1 //===-- PPCISelLowering.cpp - PPC DAG Lowering Implementation -------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the PPCISelLowering class.
12 //===----------------------------------------------------------------------===//
14 #include "PPCISelLowering.h"
15 #include "PPCMachineFunctionInfo.h"
16 #include "PPCPerfectShuffle.h"
17 #include "PPCTargetMachine.h"
18 #include "MCTargetDesc/PPCPredicates.h"
19 #include "llvm/CallingConv.h"
20 #include "llvm/Constants.h"
21 #include "llvm/DerivedTypes.h"
22 #include "llvm/Function.h"
23 #include "llvm/Intrinsics.h"
24 #include "llvm/ADT/STLExtras.h"
25 #include "llvm/CodeGen/CallingConvLower.h"
26 #include "llvm/CodeGen/MachineFrameInfo.h"
27 #include "llvm/CodeGen/MachineFunction.h"
28 #include "llvm/CodeGen/MachineInstrBuilder.h"
29 #include "llvm/CodeGen/MachineRegisterInfo.h"
30 #include "llvm/CodeGen/SelectionDAG.h"
31 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
32 #include "llvm/Support/CommandLine.h"
33 #include "llvm/Support/ErrorHandling.h"
34 #include "llvm/Support/MathExtras.h"
35 #include "llvm/Support/raw_ostream.h"
36 #include "llvm/Target/TargetOptions.h"
39 static bool CC_PPC_SVR4_Custom_Dummy(unsigned &ValNo, MVT &ValVT, MVT &LocVT,
40 CCValAssign::LocInfo &LocInfo,
41 ISD::ArgFlagsTy &ArgFlags,
43 static bool CC_PPC_SVR4_Custom_AlignArgRegs(unsigned &ValNo, MVT &ValVT,
45 CCValAssign::LocInfo &LocInfo,
46 ISD::ArgFlagsTy &ArgFlags,
48 static bool CC_PPC_SVR4_Custom_AlignFPArgRegs(unsigned &ValNo, MVT &ValVT,
50 CCValAssign::LocInfo &LocInfo,
51 ISD::ArgFlagsTy &ArgFlags,
54 static cl::opt<bool> DisablePPCPreinc("disable-ppc-preinc",
55 cl::desc("disable preincrement load/store generation on PPC"), cl::Hidden);
57 static cl::opt<bool> DisableILPPref("disable-ppc-ilp-pref",
58 cl::desc("disable setting the node scheduling preference to ILP on PPC"), cl::Hidden);
60 static TargetLoweringObjectFile *CreateTLOF(const PPCTargetMachine &TM) {
61 if (TM.getSubtargetImpl()->isDarwin())
62 return new TargetLoweringObjectFileMachO();
64 return new TargetLoweringObjectFileELF();
67 PPCTargetLowering::PPCTargetLowering(PPCTargetMachine &TM)
68 : TargetLowering(TM, CreateTLOF(TM)), PPCSubTarget(*TM.getSubtargetImpl()) {
69 const PPCSubtarget *Subtarget = &TM.getSubtarget<PPCSubtarget>();
73 // Use _setjmp/_longjmp instead of setjmp/longjmp.
74 setUseUnderscoreSetJmp(true);
75 setUseUnderscoreLongJmp(true);
77 // On PPC32/64, arguments smaller than 4/8 bytes are extended, so all
78 // arguments are at least 4/8 bytes aligned.
79 bool isPPC64 = Subtarget->isPPC64();
80 setMinStackArgumentAlignment(isPPC64 ? 8:4);
82 // Set up the register classes.
83 addRegisterClass(MVT::i32, &PPC::GPRCRegClass);
84 addRegisterClass(MVT::f32, &PPC::F4RCRegClass);
85 addRegisterClass(MVT::f64, &PPC::F8RCRegClass);
87 // PowerPC has an i16 but no i8 (or i1) SEXTLOAD
88 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
89 setLoadExtAction(ISD::SEXTLOAD, MVT::i8, Expand);
91 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
93 // PowerPC has pre-inc load and store's.
94 setIndexedLoadAction(ISD::PRE_INC, MVT::i1, Legal);
95 setIndexedLoadAction(ISD::PRE_INC, MVT::i8, Legal);
96 setIndexedLoadAction(ISD::PRE_INC, MVT::i16, Legal);
97 setIndexedLoadAction(ISD::PRE_INC, MVT::i32, Legal);
98 setIndexedLoadAction(ISD::PRE_INC, MVT::i64, Legal);
99 setIndexedStoreAction(ISD::PRE_INC, MVT::i1, Legal);
100 setIndexedStoreAction(ISD::PRE_INC, MVT::i8, Legal);
101 setIndexedStoreAction(ISD::PRE_INC, MVT::i16, Legal);
102 setIndexedStoreAction(ISD::PRE_INC, MVT::i32, Legal);
103 setIndexedStoreAction(ISD::PRE_INC, MVT::i64, Legal);
105 // This is used in the ppcf128->int sequence. Note it has different semantics
106 // from FP_ROUND: that rounds to nearest, this rounds to zero.
107 setOperationAction(ISD::FP_ROUND_INREG, MVT::ppcf128, Custom);
109 // We do not currently implement these libm ops for PowerPC.
110 setOperationAction(ISD::FFLOOR, MVT::ppcf128, Expand);
111 setOperationAction(ISD::FCEIL, MVT::ppcf128, Expand);
112 setOperationAction(ISD::FTRUNC, MVT::ppcf128, Expand);
113 setOperationAction(ISD::FRINT, MVT::ppcf128, Expand);
114 setOperationAction(ISD::FNEARBYINT, MVT::ppcf128, Expand);
116 // PowerPC has no SREM/UREM instructions
117 setOperationAction(ISD::SREM, MVT::i32, Expand);
118 setOperationAction(ISD::UREM, MVT::i32, Expand);
119 setOperationAction(ISD::SREM, MVT::i64, Expand);
120 setOperationAction(ISD::UREM, MVT::i64, Expand);
122 // Don't use SMUL_LOHI/UMUL_LOHI or SDIVREM/UDIVREM to lower SREM/UREM.
123 setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
124 setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
125 setOperationAction(ISD::UMUL_LOHI, MVT::i64, Expand);
126 setOperationAction(ISD::SMUL_LOHI, MVT::i64, Expand);
127 setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
128 setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
129 setOperationAction(ISD::UDIVREM, MVT::i64, Expand);
130 setOperationAction(ISD::SDIVREM, MVT::i64, Expand);
132 // We don't support sin/cos/sqrt/fmod/pow
133 setOperationAction(ISD::FSIN , MVT::f64, Expand);
134 setOperationAction(ISD::FCOS , MVT::f64, Expand);
135 setOperationAction(ISD::FREM , MVT::f64, Expand);
136 setOperationAction(ISD::FPOW , MVT::f64, Expand);
137 setOperationAction(ISD::FMA , MVT::f64, Legal);
138 setOperationAction(ISD::FSIN , MVT::f32, Expand);
139 setOperationAction(ISD::FCOS , MVT::f32, Expand);
140 setOperationAction(ISD::FREM , MVT::f32, Expand);
141 setOperationAction(ISD::FPOW , MVT::f32, Expand);
142 setOperationAction(ISD::FMA , MVT::f32, Legal);
144 setOperationAction(ISD::FLT_ROUNDS_, MVT::i32, Custom);
146 // If we're enabling GP optimizations, use hardware square root
147 if (!Subtarget->hasFSQRT()) {
148 setOperationAction(ISD::FSQRT, MVT::f64, Expand);
149 setOperationAction(ISD::FSQRT, MVT::f32, Expand);
152 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
153 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
155 // PowerPC does not have BSWAP, CTPOP or CTTZ
156 setOperationAction(ISD::BSWAP, MVT::i32 , Expand);
157 setOperationAction(ISD::CTPOP, MVT::i32 , Expand);
158 setOperationAction(ISD::CTTZ , MVT::i32 , Expand);
159 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i32, Expand);
160 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32, Expand);
161 setOperationAction(ISD::BSWAP, MVT::i64 , Expand);
162 setOperationAction(ISD::CTPOP, MVT::i64 , Expand);
163 setOperationAction(ISD::CTTZ , MVT::i64 , Expand);
164 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i64, Expand);
165 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Expand);
167 // PowerPC does not have ROTR
168 setOperationAction(ISD::ROTR, MVT::i32 , Expand);
169 setOperationAction(ISD::ROTR, MVT::i64 , Expand);
171 // PowerPC does not have Select
172 setOperationAction(ISD::SELECT, MVT::i32, Expand);
173 setOperationAction(ISD::SELECT, MVT::i64, Expand);
174 setOperationAction(ISD::SELECT, MVT::f32, Expand);
175 setOperationAction(ISD::SELECT, MVT::f64, Expand);
177 // PowerPC wants to turn select_cc of FP into fsel when possible.
178 setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
179 setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
181 // PowerPC wants to optimize integer setcc a bit
182 setOperationAction(ISD::SETCC, MVT::i32, Custom);
184 // PowerPC does not have BRCOND which requires SetCC
185 setOperationAction(ISD::BRCOND, MVT::Other, Expand);
187 setOperationAction(ISD::BR_JT, MVT::Other, Expand);
189 // PowerPC turns FP_TO_SINT into FCTIWZ and some load/stores.
190 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
192 // PowerPC does not have [U|S]INT_TO_FP
193 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Expand);
194 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Expand);
196 setOperationAction(ISD::BITCAST, MVT::f32, Expand);
197 setOperationAction(ISD::BITCAST, MVT::i32, Expand);
198 setOperationAction(ISD::BITCAST, MVT::i64, Expand);
199 setOperationAction(ISD::BITCAST, MVT::f64, Expand);
201 // We cannot sextinreg(i1). Expand to shifts.
202 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
204 setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
205 setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
206 setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
207 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
210 // We want to legalize GlobalAddress and ConstantPool nodes into the
211 // appropriate instructions to materialize the address.
212 setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
213 setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
214 setOperationAction(ISD::BlockAddress, MVT::i32, Custom);
215 setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
216 setOperationAction(ISD::JumpTable, MVT::i32, Custom);
217 setOperationAction(ISD::GlobalAddress, MVT::i64, Custom);
218 setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
219 setOperationAction(ISD::BlockAddress, MVT::i64, Custom);
220 setOperationAction(ISD::ConstantPool, MVT::i64, Custom);
221 setOperationAction(ISD::JumpTable, MVT::i64, Custom);
224 setOperationAction(ISD::TRAP, MVT::Other, Legal);
226 // TRAMPOLINE is custom lowered.
227 setOperationAction(ISD::INIT_TRAMPOLINE, MVT::Other, Custom);
228 setOperationAction(ISD::ADJUST_TRAMPOLINE, MVT::Other, Custom);
230 // VASTART needs to be custom lowered to use the VarArgsFrameIndex
231 setOperationAction(ISD::VASTART , MVT::Other, Custom);
233 if (Subtarget->isSVR4ABI()) {
235 // VAARG always uses double-word chunks, so promote anything smaller.
236 setOperationAction(ISD::VAARG, MVT::i1, Promote);
237 AddPromotedToType (ISD::VAARG, MVT::i1, MVT::i64);
238 setOperationAction(ISD::VAARG, MVT::i8, Promote);
239 AddPromotedToType (ISD::VAARG, MVT::i8, MVT::i64);
240 setOperationAction(ISD::VAARG, MVT::i16, Promote);
241 AddPromotedToType (ISD::VAARG, MVT::i16, MVT::i64);
242 setOperationAction(ISD::VAARG, MVT::i32, Promote);
243 AddPromotedToType (ISD::VAARG, MVT::i32, MVT::i64);
244 setOperationAction(ISD::VAARG, MVT::Other, Expand);
246 // VAARG is custom lowered with the 32-bit SVR4 ABI.
247 setOperationAction(ISD::VAARG, MVT::Other, Custom);
248 setOperationAction(ISD::VAARG, MVT::i64, Custom);
251 setOperationAction(ISD::VAARG, MVT::Other, Expand);
253 // Use the default implementation.
254 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
255 setOperationAction(ISD::VAEND , MVT::Other, Expand);
256 setOperationAction(ISD::STACKSAVE , MVT::Other, Expand);
257 setOperationAction(ISD::STACKRESTORE , MVT::Other, Custom);
258 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32 , Custom);
259 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64 , Custom);
261 // We want to custom lower some of our intrinsics.
262 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
264 // Comparisons that require checking two conditions.
265 setCondCodeAction(ISD::SETULT, MVT::f32, Expand);
266 setCondCodeAction(ISD::SETULT, MVT::f64, Expand);
267 setCondCodeAction(ISD::SETUGT, MVT::f32, Expand);
268 setCondCodeAction(ISD::SETUGT, MVT::f64, Expand);
269 setCondCodeAction(ISD::SETUEQ, MVT::f32, Expand);
270 setCondCodeAction(ISD::SETUEQ, MVT::f64, Expand);
271 setCondCodeAction(ISD::SETOGE, MVT::f32, Expand);
272 setCondCodeAction(ISD::SETOGE, MVT::f64, Expand);
273 setCondCodeAction(ISD::SETOLE, MVT::f32, Expand);
274 setCondCodeAction(ISD::SETOLE, MVT::f64, Expand);
275 setCondCodeAction(ISD::SETONE, MVT::f32, Expand);
276 setCondCodeAction(ISD::SETONE, MVT::f64, Expand);
278 if (Subtarget->has64BitSupport()) {
279 // They also have instructions for converting between i64 and fp.
280 setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
281 setOperationAction(ISD::FP_TO_UINT, MVT::i64, Expand);
282 setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom);
283 setOperationAction(ISD::UINT_TO_FP, MVT::i64, Expand);
284 // This is just the low 32 bits of a (signed) fp->i64 conversion.
285 // We cannot do this with Promote because i64 is not a legal type.
286 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom);
288 // FIXME: disable this lowered code. This generates 64-bit register values,
289 // and we don't model the fact that the top part is clobbered by calls. We
290 // need to flag these together so that the value isn't live across a call.
291 //setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
293 // PowerPC does not have FP_TO_UINT on 32-bit implementations.
294 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Expand);
297 if (Subtarget->use64BitRegs()) {
298 // 64-bit PowerPC implementations can support i64 types directly
299 addRegisterClass(MVT::i64, &PPC::G8RCRegClass);
300 // BUILD_PAIR can't be handled natively, and should be expanded to shl/or
301 setOperationAction(ISD::BUILD_PAIR, MVT::i64, Expand);
302 // 64-bit PowerPC wants to expand i128 shifts itself.
303 setOperationAction(ISD::SHL_PARTS, MVT::i64, Custom);
304 setOperationAction(ISD::SRA_PARTS, MVT::i64, Custom);
305 setOperationAction(ISD::SRL_PARTS, MVT::i64, Custom);
307 // 32-bit PowerPC wants to expand i64 shifts itself.
308 setOperationAction(ISD::SHL_PARTS, MVT::i32, Custom);
309 setOperationAction(ISD::SRA_PARTS, MVT::i32, Custom);
310 setOperationAction(ISD::SRL_PARTS, MVT::i32, Custom);
313 if (Subtarget->hasAltivec()) {
314 // First set operation action for all vector types to expand. Then we
315 // will selectively turn on ones that can be effectively codegen'd.
316 for (unsigned i = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
317 i <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++i) {
318 MVT::SimpleValueType VT = (MVT::SimpleValueType)i;
320 // add/sub are legal for all supported vector VT's.
321 setOperationAction(ISD::ADD , VT, Legal);
322 setOperationAction(ISD::SUB , VT, Legal);
324 // We promote all shuffles to v16i8.
325 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Promote);
326 AddPromotedToType (ISD::VECTOR_SHUFFLE, VT, MVT::v16i8);
328 // We promote all non-typed operations to v4i32.
329 setOperationAction(ISD::AND , VT, Promote);
330 AddPromotedToType (ISD::AND , VT, MVT::v4i32);
331 setOperationAction(ISD::OR , VT, Promote);
332 AddPromotedToType (ISD::OR , VT, MVT::v4i32);
333 setOperationAction(ISD::XOR , VT, Promote);
334 AddPromotedToType (ISD::XOR , VT, MVT::v4i32);
335 setOperationAction(ISD::LOAD , VT, Promote);
336 AddPromotedToType (ISD::LOAD , VT, MVT::v4i32);
337 setOperationAction(ISD::SELECT, VT, Promote);
338 AddPromotedToType (ISD::SELECT, VT, MVT::v4i32);
339 setOperationAction(ISD::STORE, VT, Promote);
340 AddPromotedToType (ISD::STORE, VT, MVT::v4i32);
342 // No other operations are legal.
343 setOperationAction(ISD::MUL , VT, Expand);
344 setOperationAction(ISD::SDIV, VT, Expand);
345 setOperationAction(ISD::SREM, VT, Expand);
346 setOperationAction(ISD::UDIV, VT, Expand);
347 setOperationAction(ISD::UREM, VT, Expand);
348 setOperationAction(ISD::FDIV, VT, Expand);
349 setOperationAction(ISD::FNEG, VT, Expand);
350 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Expand);
351 setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Expand);
352 setOperationAction(ISD::BUILD_VECTOR, VT, Expand);
353 setOperationAction(ISD::UMUL_LOHI, VT, Expand);
354 setOperationAction(ISD::SMUL_LOHI, VT, Expand);
355 setOperationAction(ISD::UDIVREM, VT, Expand);
356 setOperationAction(ISD::SDIVREM, VT, Expand);
357 setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Expand);
358 setOperationAction(ISD::FPOW, VT, Expand);
359 setOperationAction(ISD::CTPOP, VT, Expand);
360 setOperationAction(ISD::CTLZ, VT, Expand);
361 setOperationAction(ISD::CTLZ_ZERO_UNDEF, VT, Expand);
362 setOperationAction(ISD::CTTZ, VT, Expand);
363 setOperationAction(ISD::CTTZ_ZERO_UNDEF, VT, Expand);
366 // We can custom expand all VECTOR_SHUFFLEs to VPERM, others we can handle
367 // with merges, splats, etc.
368 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v16i8, Custom);
370 setOperationAction(ISD::AND , MVT::v4i32, Legal);
371 setOperationAction(ISD::OR , MVT::v4i32, Legal);
372 setOperationAction(ISD::XOR , MVT::v4i32, Legal);
373 setOperationAction(ISD::LOAD , MVT::v4i32, Legal);
374 setOperationAction(ISD::SELECT, MVT::v4i32, Expand);
375 setOperationAction(ISD::STORE , MVT::v4i32, Legal);
377 addRegisterClass(MVT::v4f32, &PPC::VRRCRegClass);
378 addRegisterClass(MVT::v4i32, &PPC::VRRCRegClass);
379 addRegisterClass(MVT::v8i16, &PPC::VRRCRegClass);
380 addRegisterClass(MVT::v16i8, &PPC::VRRCRegClass);
382 setOperationAction(ISD::MUL, MVT::v4f32, Legal);
383 setOperationAction(ISD::FMA, MVT::v4f32, Legal);
384 setOperationAction(ISD::MUL, MVT::v4i32, Custom);
385 setOperationAction(ISD::MUL, MVT::v8i16, Custom);
386 setOperationAction(ISD::MUL, MVT::v16i8, Custom);
388 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4f32, Custom);
389 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i32, Custom);
391 setOperationAction(ISD::BUILD_VECTOR, MVT::v16i8, Custom);
392 setOperationAction(ISD::BUILD_VECTOR, MVT::v8i16, Custom);
393 setOperationAction(ISD::BUILD_VECTOR, MVT::v4i32, Custom);
394 setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
397 if (Subtarget->has64BitSupport()) {
398 setOperationAction(ISD::PREFETCH, MVT::Other, Legal);
399 setOperationAction(ISD::READCYCLECOUNTER, MVT::i64, Legal);
402 setOperationAction(ISD::ATOMIC_LOAD, MVT::i32, Expand);
403 setOperationAction(ISD::ATOMIC_STORE, MVT::i32, Expand);
405 setBooleanContents(ZeroOrOneBooleanContent);
406 setBooleanVectorContents(ZeroOrOneBooleanContent); // FIXME: Is this correct?
409 setStackPointerRegisterToSaveRestore(PPC::X1);
410 setExceptionPointerRegister(PPC::X3);
411 setExceptionSelectorRegister(PPC::X4);
413 setStackPointerRegisterToSaveRestore(PPC::R1);
414 setExceptionPointerRegister(PPC::R3);
415 setExceptionSelectorRegister(PPC::R4);
418 // We have target-specific dag combine patterns for the following nodes:
419 setTargetDAGCombine(ISD::SINT_TO_FP);
420 setTargetDAGCombine(ISD::STORE);
421 setTargetDAGCombine(ISD::BR_CC);
422 setTargetDAGCombine(ISD::BSWAP);
424 // Darwin long double math library functions have $LDBL128 appended.
425 if (Subtarget->isDarwin()) {
426 setLibcallName(RTLIB::COS_PPCF128, "cosl$LDBL128");
427 setLibcallName(RTLIB::POW_PPCF128, "powl$LDBL128");
428 setLibcallName(RTLIB::REM_PPCF128, "fmodl$LDBL128");
429 setLibcallName(RTLIB::SIN_PPCF128, "sinl$LDBL128");
430 setLibcallName(RTLIB::SQRT_PPCF128, "sqrtl$LDBL128");
431 setLibcallName(RTLIB::LOG_PPCF128, "logl$LDBL128");
432 setLibcallName(RTLIB::LOG2_PPCF128, "log2l$LDBL128");
433 setLibcallName(RTLIB::LOG10_PPCF128, "log10l$LDBL128");
434 setLibcallName(RTLIB::EXP_PPCF128, "expl$LDBL128");
435 setLibcallName(RTLIB::EXP2_PPCF128, "exp2l$LDBL128");
438 setMinFunctionAlignment(2);
439 if (PPCSubTarget.isDarwin())
440 setPrefFunctionAlignment(4);
442 if (isPPC64 && Subtarget->isJITCodeModel())
443 // Temporary workaround for the inability of PPC64 JIT to handle jump
445 setSupportJumpTables(false);
447 setInsertFencesForAtomic(true);
449 setSchedulingPreference(Sched::Hybrid);
451 computeRegisterProperties();
453 // The Freescale cores does better with aggressive inlining of memcpy and
454 // friends. Gcc uses same threshold of 128 bytes (= 32 word stores).
455 if (Subtarget->getDarwinDirective() == PPC::DIR_E500mc ||
456 Subtarget->getDarwinDirective() == PPC::DIR_E5500) {
457 maxStoresPerMemset = 32;
458 maxStoresPerMemsetOptSize = 16;
459 maxStoresPerMemcpy = 32;
460 maxStoresPerMemcpyOptSize = 8;
461 maxStoresPerMemmove = 32;
462 maxStoresPerMemmoveOptSize = 8;
464 setPrefFunctionAlignment(4);
465 benefitFromCodePlacementOpt = true;
469 /// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
470 /// function arguments in the caller parameter area.
471 unsigned PPCTargetLowering::getByValTypeAlignment(Type *Ty) const {
472 const TargetMachine &TM = getTargetMachine();
473 // Darwin passes everything on 4 byte boundary.
474 if (TM.getSubtarget<PPCSubtarget>().isDarwin())
477 // 16byte and wider vectors are passed on 16byte boundary.
478 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
479 if (VTy->getBitWidth() >= 128)
482 // The rest is 8 on PPC64 and 4 on PPC32 boundary.
483 if (PPCSubTarget.isPPC64())
489 const char *PPCTargetLowering::getTargetNodeName(unsigned Opcode) const {
492 case PPCISD::FSEL: return "PPCISD::FSEL";
493 case PPCISD::FCFID: return "PPCISD::FCFID";
494 case PPCISD::FCTIDZ: return "PPCISD::FCTIDZ";
495 case PPCISD::FCTIWZ: return "PPCISD::FCTIWZ";
496 case PPCISD::STFIWX: return "PPCISD::STFIWX";
497 case PPCISD::VMADDFP: return "PPCISD::VMADDFP";
498 case PPCISD::VNMSUBFP: return "PPCISD::VNMSUBFP";
499 case PPCISD::VPERM: return "PPCISD::VPERM";
500 case PPCISD::Hi: return "PPCISD::Hi";
501 case PPCISD::Lo: return "PPCISD::Lo";
502 case PPCISD::TOC_ENTRY: return "PPCISD::TOC_ENTRY";
503 case PPCISD::TOC_RESTORE: return "PPCISD::TOC_RESTORE";
504 case PPCISD::LOAD: return "PPCISD::LOAD";
505 case PPCISD::LOAD_TOC: return "PPCISD::LOAD_TOC";
506 case PPCISD::DYNALLOC: return "PPCISD::DYNALLOC";
507 case PPCISD::GlobalBaseReg: return "PPCISD::GlobalBaseReg";
508 case PPCISD::SRL: return "PPCISD::SRL";
509 case PPCISD::SRA: return "PPCISD::SRA";
510 case PPCISD::SHL: return "PPCISD::SHL";
511 case PPCISD::EXTSW_32: return "PPCISD::EXTSW_32";
512 case PPCISD::STD_32: return "PPCISD::STD_32";
513 case PPCISD::CALL_SVR4: return "PPCISD::CALL_SVR4";
514 case PPCISD::CALL_NOP_SVR4: return "PPCISD::CALL_NOP_SVR4";
515 case PPCISD::CALL_Darwin: return "PPCISD::CALL_Darwin";
516 case PPCISD::NOP: return "PPCISD::NOP";
517 case PPCISD::MTCTR: return "PPCISD::MTCTR";
518 case PPCISD::BCTRL_Darwin: return "PPCISD::BCTRL_Darwin";
519 case PPCISD::BCTRL_SVR4: return "PPCISD::BCTRL_SVR4";
520 case PPCISD::RET_FLAG: return "PPCISD::RET_FLAG";
521 case PPCISD::MFCR: return "PPCISD::MFCR";
522 case PPCISD::VCMP: return "PPCISD::VCMP";
523 case PPCISD::VCMPo: return "PPCISD::VCMPo";
524 case PPCISD::LBRX: return "PPCISD::LBRX";
525 case PPCISD::STBRX: return "PPCISD::STBRX";
526 case PPCISD::LARX: return "PPCISD::LARX";
527 case PPCISD::STCX: return "PPCISD::STCX";
528 case PPCISD::COND_BRANCH: return "PPCISD::COND_BRANCH";
529 case PPCISD::MFFS: return "PPCISD::MFFS";
530 case PPCISD::MTFSB0: return "PPCISD::MTFSB0";
531 case PPCISD::MTFSB1: return "PPCISD::MTFSB1";
532 case PPCISD::FADDRTZ: return "PPCISD::FADDRTZ";
533 case PPCISD::MTFSF: return "PPCISD::MTFSF";
534 case PPCISD::TC_RETURN: return "PPCISD::TC_RETURN";
535 case PPCISD::CR6SET: return "PPCISD::CR6SET";
536 case PPCISD::CR6UNSET: return "PPCISD::CR6UNSET";
540 EVT PPCTargetLowering::getSetCCResultType(EVT VT) const {
544 //===----------------------------------------------------------------------===//
545 // Node matching predicates, for use by the tblgen matching code.
546 //===----------------------------------------------------------------------===//
548 /// isFloatingPointZero - Return true if this is 0.0 or -0.0.
549 static bool isFloatingPointZero(SDValue Op) {
550 if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Op))
551 return CFP->getValueAPF().isZero();
552 else if (ISD::isEXTLoad(Op.getNode()) || ISD::isNON_EXTLoad(Op.getNode())) {
553 // Maybe this has already been legalized into the constant pool?
554 if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(Op.getOperand(1)))
555 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CP->getConstVal()))
556 return CFP->getValueAPF().isZero();
561 /// isConstantOrUndef - Op is either an undef node or a ConstantSDNode. Return
562 /// true if Op is undef or if it matches the specified value.
563 static bool isConstantOrUndef(int Op, int Val) {
564 return Op < 0 || Op == Val;
567 /// isVPKUHUMShuffleMask - Return true if this is the shuffle mask for a
568 /// VPKUHUM instruction.
569 bool PPC::isVPKUHUMShuffleMask(ShuffleVectorSDNode *N, bool isUnary) {
571 for (unsigned i = 0; i != 16; ++i)
572 if (!isConstantOrUndef(N->getMaskElt(i), i*2+1))
575 for (unsigned i = 0; i != 8; ++i)
576 if (!isConstantOrUndef(N->getMaskElt(i), i*2+1) ||
577 !isConstantOrUndef(N->getMaskElt(i+8), i*2+1))
583 /// isVPKUWUMShuffleMask - Return true if this is the shuffle mask for a
584 /// VPKUWUM instruction.
585 bool PPC::isVPKUWUMShuffleMask(ShuffleVectorSDNode *N, bool isUnary) {
587 for (unsigned i = 0; i != 16; i += 2)
588 if (!isConstantOrUndef(N->getMaskElt(i ), i*2+2) ||
589 !isConstantOrUndef(N->getMaskElt(i+1), i*2+3))
592 for (unsigned i = 0; i != 8; i += 2)
593 if (!isConstantOrUndef(N->getMaskElt(i ), i*2+2) ||
594 !isConstantOrUndef(N->getMaskElt(i+1), i*2+3) ||
595 !isConstantOrUndef(N->getMaskElt(i+8), i*2+2) ||
596 !isConstantOrUndef(N->getMaskElt(i+9), i*2+3))
602 /// isVMerge - Common function, used to match vmrg* shuffles.
604 static bool isVMerge(ShuffleVectorSDNode *N, unsigned UnitSize,
605 unsigned LHSStart, unsigned RHSStart) {
606 assert(N->getValueType(0) == MVT::v16i8 &&
607 "PPC only supports shuffles by bytes!");
608 assert((UnitSize == 1 || UnitSize == 2 || UnitSize == 4) &&
609 "Unsupported merge size!");
611 for (unsigned i = 0; i != 8/UnitSize; ++i) // Step over units
612 for (unsigned j = 0; j != UnitSize; ++j) { // Step over bytes within unit
613 if (!isConstantOrUndef(N->getMaskElt(i*UnitSize*2+j),
614 LHSStart+j+i*UnitSize) ||
615 !isConstantOrUndef(N->getMaskElt(i*UnitSize*2+UnitSize+j),
616 RHSStart+j+i*UnitSize))
622 /// isVMRGLShuffleMask - Return true if this is a shuffle mask suitable for
623 /// a VRGL* instruction with the specified unit size (1,2 or 4 bytes).
624 bool PPC::isVMRGLShuffleMask(ShuffleVectorSDNode *N, unsigned UnitSize,
627 return isVMerge(N, UnitSize, 8, 24);
628 return isVMerge(N, UnitSize, 8, 8);
631 /// isVMRGHShuffleMask - Return true if this is a shuffle mask suitable for
632 /// a VRGH* instruction with the specified unit size (1,2 or 4 bytes).
633 bool PPC::isVMRGHShuffleMask(ShuffleVectorSDNode *N, unsigned UnitSize,
636 return isVMerge(N, UnitSize, 0, 16);
637 return isVMerge(N, UnitSize, 0, 0);
641 /// isVSLDOIShuffleMask - If this is a vsldoi shuffle mask, return the shift
642 /// amount, otherwise return -1.
643 int PPC::isVSLDOIShuffleMask(SDNode *N, bool isUnary) {
644 assert(N->getValueType(0) == MVT::v16i8 &&
645 "PPC only supports shuffles by bytes!");
647 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
649 // Find the first non-undef value in the shuffle mask.
651 for (i = 0; i != 16 && SVOp->getMaskElt(i) < 0; ++i)
654 if (i == 16) return -1; // all undef.
656 // Otherwise, check to see if the rest of the elements are consecutively
657 // numbered from this value.
658 unsigned ShiftAmt = SVOp->getMaskElt(i);
659 if (ShiftAmt < i) return -1;
663 // Check the rest of the elements to see if they are consecutive.
664 for (++i; i != 16; ++i)
665 if (!isConstantOrUndef(SVOp->getMaskElt(i), ShiftAmt+i))
668 // Check the rest of the elements to see if they are consecutive.
669 for (++i; i != 16; ++i)
670 if (!isConstantOrUndef(SVOp->getMaskElt(i), (ShiftAmt+i) & 15))
676 /// isSplatShuffleMask - Return true if the specified VECTOR_SHUFFLE operand
677 /// specifies a splat of a single element that is suitable for input to
678 /// VSPLTB/VSPLTH/VSPLTW.
679 bool PPC::isSplatShuffleMask(ShuffleVectorSDNode *N, unsigned EltSize) {
680 assert(N->getValueType(0) == MVT::v16i8 &&
681 (EltSize == 1 || EltSize == 2 || EltSize == 4));
683 // This is a splat operation if each element of the permute is the same, and
684 // if the value doesn't reference the second vector.
685 unsigned ElementBase = N->getMaskElt(0);
687 // FIXME: Handle UNDEF elements too!
688 if (ElementBase >= 16)
691 // Check that the indices are consecutive, in the case of a multi-byte element
692 // splatted with a v16i8 mask.
693 for (unsigned i = 1; i != EltSize; ++i)
694 if (N->getMaskElt(i) < 0 || N->getMaskElt(i) != (int)(i+ElementBase))
697 for (unsigned i = EltSize, e = 16; i != e; i += EltSize) {
698 if (N->getMaskElt(i) < 0) continue;
699 for (unsigned j = 0; j != EltSize; ++j)
700 if (N->getMaskElt(i+j) != N->getMaskElt(j))
706 /// isAllNegativeZeroVector - Returns true if all elements of build_vector
708 bool PPC::isAllNegativeZeroVector(SDNode *N) {
709 BuildVectorSDNode *BV = cast<BuildVectorSDNode>(N);
711 APInt APVal, APUndef;
715 if (BV->isConstantSplat(APVal, APUndef, BitSize, HasAnyUndefs, 32, true))
716 if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
717 return CFP->getValueAPF().isNegZero();
722 /// getVSPLTImmediate - Return the appropriate VSPLT* immediate to splat the
723 /// specified isSplatShuffleMask VECTOR_SHUFFLE mask.
724 unsigned PPC::getVSPLTImmediate(SDNode *N, unsigned EltSize) {
725 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
726 assert(isSplatShuffleMask(SVOp, EltSize));
727 return SVOp->getMaskElt(0) / EltSize;
730 /// get_VSPLTI_elt - If this is a build_vector of constants which can be formed
731 /// by using a vspltis[bhw] instruction of the specified element size, return
732 /// the constant being splatted. The ByteSize field indicates the number of
733 /// bytes of each element [124] -> [bhw].
734 SDValue PPC::get_VSPLTI_elt(SDNode *N, unsigned ByteSize, SelectionDAG &DAG) {
737 // If ByteSize of the splat is bigger than the element size of the
738 // build_vector, then we have a case where we are checking for a splat where
739 // multiple elements of the buildvector are folded together into a single
740 // logical element of the splat (e.g. "vsplish 1" to splat {0,1}*8).
741 unsigned EltSize = 16/N->getNumOperands();
742 if (EltSize < ByteSize) {
743 unsigned Multiple = ByteSize/EltSize; // Number of BV entries per spltval.
744 SDValue UniquedVals[4];
745 assert(Multiple > 1 && Multiple <= 4 && "How can this happen?");
747 // See if all of the elements in the buildvector agree across.
748 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
749 if (N->getOperand(i).getOpcode() == ISD::UNDEF) continue;
750 // If the element isn't a constant, bail fully out.
751 if (!isa<ConstantSDNode>(N->getOperand(i))) return SDValue();
754 if (UniquedVals[i&(Multiple-1)].getNode() == 0)
755 UniquedVals[i&(Multiple-1)] = N->getOperand(i);
756 else if (UniquedVals[i&(Multiple-1)] != N->getOperand(i))
757 return SDValue(); // no match.
760 // Okay, if we reached this point, UniquedVals[0..Multiple-1] contains
761 // either constant or undef values that are identical for each chunk. See
762 // if these chunks can form into a larger vspltis*.
764 // Check to see if all of the leading entries are either 0 or -1. If
765 // neither, then this won't fit into the immediate field.
766 bool LeadingZero = true;
767 bool LeadingOnes = true;
768 for (unsigned i = 0; i != Multiple-1; ++i) {
769 if (UniquedVals[i].getNode() == 0) continue; // Must have been undefs.
771 LeadingZero &= cast<ConstantSDNode>(UniquedVals[i])->isNullValue();
772 LeadingOnes &= cast<ConstantSDNode>(UniquedVals[i])->isAllOnesValue();
774 // Finally, check the least significant entry.
776 if (UniquedVals[Multiple-1].getNode() == 0)
777 return DAG.getTargetConstant(0, MVT::i32); // 0,0,0,undef
778 int Val = cast<ConstantSDNode>(UniquedVals[Multiple-1])->getZExtValue();
780 return DAG.getTargetConstant(Val, MVT::i32); // 0,0,0,4 -> vspltisw(4)
783 if (UniquedVals[Multiple-1].getNode() == 0)
784 return DAG.getTargetConstant(~0U, MVT::i32); // -1,-1,-1,undef
785 int Val =cast<ConstantSDNode>(UniquedVals[Multiple-1])->getSExtValue();
786 if (Val >= -16) // -1,-1,-1,-2 -> vspltisw(-2)
787 return DAG.getTargetConstant(Val, MVT::i32);
793 // Check to see if this buildvec has a single non-undef value in its elements.
794 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
795 if (N->getOperand(i).getOpcode() == ISD::UNDEF) continue;
796 if (OpVal.getNode() == 0)
797 OpVal = N->getOperand(i);
798 else if (OpVal != N->getOperand(i))
802 if (OpVal.getNode() == 0) return SDValue(); // All UNDEF: use implicit def.
804 unsigned ValSizeInBytes = EltSize;
806 if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(OpVal)) {
807 Value = CN->getZExtValue();
808 } else if (ConstantFPSDNode *CN = dyn_cast<ConstantFPSDNode>(OpVal)) {
809 assert(CN->getValueType(0) == MVT::f32 && "Only one legal FP vector type!");
810 Value = FloatToBits(CN->getValueAPF().convertToFloat());
813 // If the splat value is larger than the element value, then we can never do
814 // this splat. The only case that we could fit the replicated bits into our
815 // immediate field for would be zero, and we prefer to use vxor for it.
816 if (ValSizeInBytes < ByteSize) return SDValue();
818 // If the element value is larger than the splat value, cut it in half and
819 // check to see if the two halves are equal. Continue doing this until we
820 // get to ByteSize. This allows us to handle 0x01010101 as 0x01.
821 while (ValSizeInBytes > ByteSize) {
822 ValSizeInBytes >>= 1;
824 // If the top half equals the bottom half, we're still ok.
825 if (((Value >> (ValSizeInBytes*8)) & ((1 << (8*ValSizeInBytes))-1)) !=
826 (Value & ((1 << (8*ValSizeInBytes))-1)))
830 // Properly sign extend the value.
831 int MaskVal = SignExtend32(Value, ByteSize * 8);
833 // If this is zero, don't match, zero matches ISD::isBuildVectorAllZeros.
834 if (MaskVal == 0) return SDValue();
836 // Finally, if this value fits in a 5 bit sext field, return it
837 if (SignExtend32<5>(MaskVal) == MaskVal)
838 return DAG.getTargetConstant(MaskVal, MVT::i32);
842 //===----------------------------------------------------------------------===//
843 // Addressing Mode Selection
844 //===----------------------------------------------------------------------===//
846 /// isIntS16Immediate - This method tests to see if the node is either a 32-bit
847 /// or 64-bit immediate, and if the value can be accurately represented as a
848 /// sign extension from a 16-bit value. If so, this returns true and the
850 static bool isIntS16Immediate(SDNode *N, short &Imm) {
851 if (N->getOpcode() != ISD::Constant)
854 Imm = (short)cast<ConstantSDNode>(N)->getZExtValue();
855 if (N->getValueType(0) == MVT::i32)
856 return Imm == (int32_t)cast<ConstantSDNode>(N)->getZExtValue();
858 return Imm == (int64_t)cast<ConstantSDNode>(N)->getZExtValue();
860 static bool isIntS16Immediate(SDValue Op, short &Imm) {
861 return isIntS16Immediate(Op.getNode(), Imm);
865 /// SelectAddressRegReg - Given the specified addressed, check to see if it
866 /// can be represented as an indexed [r+r] operation. Returns false if it
867 /// can be more efficiently represented with [r+imm].
868 bool PPCTargetLowering::SelectAddressRegReg(SDValue N, SDValue &Base,
870 SelectionDAG &DAG) const {
872 if (N.getOpcode() == ISD::ADD) {
873 if (isIntS16Immediate(N.getOperand(1), imm))
875 if (N.getOperand(1).getOpcode() == PPCISD::Lo)
878 Base = N.getOperand(0);
879 Index = N.getOperand(1);
881 } else if (N.getOpcode() == ISD::OR) {
882 if (isIntS16Immediate(N.getOperand(1), imm))
883 return false; // r+i can fold it if we can.
885 // If this is an or of disjoint bitfields, we can codegen this as an add
886 // (for better address arithmetic) if the LHS and RHS of the OR are provably
888 APInt LHSKnownZero, LHSKnownOne;
889 APInt RHSKnownZero, RHSKnownOne;
890 DAG.ComputeMaskedBits(N.getOperand(0),
891 LHSKnownZero, LHSKnownOne);
893 if (LHSKnownZero.getBoolValue()) {
894 DAG.ComputeMaskedBits(N.getOperand(1),
895 RHSKnownZero, RHSKnownOne);
896 // If all of the bits are known zero on the LHS or RHS, the add won't
898 if (~(LHSKnownZero | RHSKnownZero) == 0) {
899 Base = N.getOperand(0);
900 Index = N.getOperand(1);
909 /// Returns true if the address N can be represented by a base register plus
910 /// a signed 16-bit displacement [r+imm], and if it is not better
911 /// represented as reg+reg.
912 bool PPCTargetLowering::SelectAddressRegImm(SDValue N, SDValue &Disp,
914 SelectionDAG &DAG) const {
915 // FIXME dl should come from parent load or store, not from address
916 DebugLoc dl = N.getDebugLoc();
917 // If this can be more profitably realized as r+r, fail.
918 if (SelectAddressRegReg(N, Disp, Base, DAG))
921 if (N.getOpcode() == ISD::ADD) {
923 if (isIntS16Immediate(N.getOperand(1), imm)) {
924 Disp = DAG.getTargetConstant((int)imm & 0xFFFF, MVT::i32);
925 if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N.getOperand(0))) {
926 Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType());
928 Base = N.getOperand(0);
930 return true; // [r+i]
931 } else if (N.getOperand(1).getOpcode() == PPCISD::Lo) {
932 // Match LOAD (ADD (X, Lo(G))).
933 assert(!cast<ConstantSDNode>(N.getOperand(1).getOperand(1))->getZExtValue()
934 && "Cannot handle constant offsets yet!");
935 Disp = N.getOperand(1).getOperand(0); // The global address.
936 assert(Disp.getOpcode() == ISD::TargetGlobalAddress ||
937 Disp.getOpcode() == ISD::TargetGlobalTLSAddress ||
938 Disp.getOpcode() == ISD::TargetConstantPool ||
939 Disp.getOpcode() == ISD::TargetJumpTable);
940 Base = N.getOperand(0);
941 return true; // [&g+r]
943 } else if (N.getOpcode() == ISD::OR) {
945 if (isIntS16Immediate(N.getOperand(1), imm)) {
946 // If this is an or of disjoint bitfields, we can codegen this as an add
947 // (for better address arithmetic) if the LHS and RHS of the OR are
948 // provably disjoint.
949 APInt LHSKnownZero, LHSKnownOne;
950 DAG.ComputeMaskedBits(N.getOperand(0), LHSKnownZero, LHSKnownOne);
952 if ((LHSKnownZero.getZExtValue()|~(uint64_t)imm) == ~0ULL) {
953 // If all of the bits are known zero on the LHS or RHS, the add won't
955 Base = N.getOperand(0);
956 Disp = DAG.getTargetConstant((int)imm & 0xFFFF, MVT::i32);
960 } else if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(N)) {
961 // Loading from a constant address.
963 // If this address fits entirely in a 16-bit sext immediate field, codegen
966 if (isIntS16Immediate(CN, Imm)) {
967 Disp = DAG.getTargetConstant(Imm, CN->getValueType(0));
968 Base = DAG.getRegister(PPCSubTarget.isPPC64() ? PPC::X0 : PPC::R0,
969 CN->getValueType(0));
973 // Handle 32-bit sext immediates with LIS + addr mode.
974 if (CN->getValueType(0) == MVT::i32 ||
975 (int64_t)CN->getZExtValue() == (int)CN->getZExtValue()) {
976 int Addr = (int)CN->getZExtValue();
978 // Otherwise, break this down into an LIS + disp.
979 Disp = DAG.getTargetConstant((short)Addr, MVT::i32);
981 Base = DAG.getTargetConstant((Addr - (signed short)Addr) >> 16, MVT::i32);
982 unsigned Opc = CN->getValueType(0) == MVT::i32 ? PPC::LIS : PPC::LIS8;
983 Base = SDValue(DAG.getMachineNode(Opc, dl, CN->getValueType(0), Base), 0);
988 Disp = DAG.getTargetConstant(0, getPointerTy());
989 if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N))
990 Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType());
993 return true; // [r+0]
996 /// SelectAddressRegRegOnly - Given the specified addressed, force it to be
997 /// represented as an indexed [r+r] operation.
998 bool PPCTargetLowering::SelectAddressRegRegOnly(SDValue N, SDValue &Base,
1000 SelectionDAG &DAG) const {
1001 // Check to see if we can easily represent this as an [r+r] address. This
1002 // will fail if it thinks that the address is more profitably represented as
1003 // reg+imm, e.g. where imm = 0.
1004 if (SelectAddressRegReg(N, Base, Index, DAG))
1007 // If the operand is an addition, always emit this as [r+r], since this is
1008 // better (for code size, and execution, as the memop does the add for free)
1009 // than emitting an explicit add.
1010 if (N.getOpcode() == ISD::ADD) {
1011 Base = N.getOperand(0);
1012 Index = N.getOperand(1);
1016 // Otherwise, do it the hard way, using R0 as the base register.
1017 Base = DAG.getRegister(PPCSubTarget.isPPC64() ? PPC::X0 : PPC::R0,
1023 /// SelectAddressRegImmShift - Returns true if the address N can be
1024 /// represented by a base register plus a signed 14-bit displacement
1025 /// [r+imm*4]. Suitable for use by STD and friends.
1026 bool PPCTargetLowering::SelectAddressRegImmShift(SDValue N, SDValue &Disp,
1028 SelectionDAG &DAG) const {
1029 // FIXME dl should come from the parent load or store, not the address
1030 DebugLoc dl = N.getDebugLoc();
1031 // If this can be more profitably realized as r+r, fail.
1032 if (SelectAddressRegReg(N, Disp, Base, DAG))
1035 if (N.getOpcode() == ISD::ADD) {
1037 if (isIntS16Immediate(N.getOperand(1), imm) && (imm & 3) == 0) {
1038 Disp = DAG.getTargetConstant(((int)imm & 0xFFFF) >> 2, MVT::i32);
1039 if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N.getOperand(0))) {
1040 Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType());
1042 Base = N.getOperand(0);
1044 return true; // [r+i]
1045 } else if (N.getOperand(1).getOpcode() == PPCISD::Lo) {
1046 // Match LOAD (ADD (X, Lo(G))).
1047 assert(!cast<ConstantSDNode>(N.getOperand(1).getOperand(1))->getZExtValue()
1048 && "Cannot handle constant offsets yet!");
1049 Disp = N.getOperand(1).getOperand(0); // The global address.
1050 assert(Disp.getOpcode() == ISD::TargetGlobalAddress ||
1051 Disp.getOpcode() == ISD::TargetConstantPool ||
1052 Disp.getOpcode() == ISD::TargetJumpTable);
1053 Base = N.getOperand(0);
1054 return true; // [&g+r]
1056 } else if (N.getOpcode() == ISD::OR) {
1058 if (isIntS16Immediate(N.getOperand(1), imm) && (imm & 3) == 0) {
1059 // If this is an or of disjoint bitfields, we can codegen this as an add
1060 // (for better address arithmetic) if the LHS and RHS of the OR are
1061 // provably disjoint.
1062 APInt LHSKnownZero, LHSKnownOne;
1063 DAG.ComputeMaskedBits(N.getOperand(0), LHSKnownZero, LHSKnownOne);
1064 if ((LHSKnownZero.getZExtValue()|~(uint64_t)imm) == ~0ULL) {
1065 // If all of the bits are known zero on the LHS or RHS, the add won't
1067 Base = N.getOperand(0);
1068 Disp = DAG.getTargetConstant(((int)imm & 0xFFFF) >> 2, MVT::i32);
1072 } else if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(N)) {
1073 // Loading from a constant address. Verify low two bits are clear.
1074 if ((CN->getZExtValue() & 3) == 0) {
1075 // If this address fits entirely in a 14-bit sext immediate field, codegen
1078 if (isIntS16Immediate(CN, Imm)) {
1079 Disp = DAG.getTargetConstant((unsigned short)Imm >> 2, getPointerTy());
1080 Base = DAG.getRegister(PPCSubTarget.isPPC64() ? PPC::X0 : PPC::R0,
1081 CN->getValueType(0));
1085 // Fold the low-part of 32-bit absolute addresses into addr mode.
1086 if (CN->getValueType(0) == MVT::i32 ||
1087 (int64_t)CN->getZExtValue() == (int)CN->getZExtValue()) {
1088 int Addr = (int)CN->getZExtValue();
1090 // Otherwise, break this down into an LIS + disp.
1091 Disp = DAG.getTargetConstant((short)Addr >> 2, MVT::i32);
1092 Base = DAG.getTargetConstant((Addr-(signed short)Addr) >> 16, MVT::i32);
1093 unsigned Opc = CN->getValueType(0) == MVT::i32 ? PPC::LIS : PPC::LIS8;
1094 Base = SDValue(DAG.getMachineNode(Opc, dl, CN->getValueType(0), Base),0);
1100 Disp = DAG.getTargetConstant(0, getPointerTy());
1101 if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N))
1102 Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType());
1105 return true; // [r+0]
1109 /// getPreIndexedAddressParts - returns true by value, base pointer and
1110 /// offset pointer and addressing mode by reference if the node's address
1111 /// can be legally represented as pre-indexed load / store address.
1112 bool PPCTargetLowering::getPreIndexedAddressParts(SDNode *N, SDValue &Base,
1114 ISD::MemIndexedMode &AM,
1115 SelectionDAG &DAG) const {
1116 if (DisablePPCPreinc) return false;
1120 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
1121 Ptr = LD->getBasePtr();
1122 VT = LD->getMemoryVT();
1124 } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
1125 Ptr = ST->getBasePtr();
1126 VT = ST->getMemoryVT();
1130 // PowerPC doesn't have preinc load/store instructions for vectors.
1134 if (SelectAddressRegReg(Ptr, Offset, Base, DAG)) {
1139 // LDU/STU use reg+imm*4, others use reg+imm.
1140 if (VT != MVT::i64) {
1142 if (!SelectAddressRegImm(Ptr, Offset, Base, DAG))
1146 if (!SelectAddressRegImmShift(Ptr, Offset, Base, DAG))
1150 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
1151 // PPC64 doesn't have lwau, but it does have lwaux. Reject preinc load of
1152 // sext i32 to i64 when addr mode is r+i.
1153 if (LD->getValueType(0) == MVT::i64 && LD->getMemoryVT() == MVT::i32 &&
1154 LD->getExtensionType() == ISD::SEXTLOAD &&
1155 isa<ConstantSDNode>(Offset))
1163 //===----------------------------------------------------------------------===//
1164 // LowerOperation implementation
1165 //===----------------------------------------------------------------------===//
1167 /// GetLabelAccessInfo - Return true if we should reference labels using a
1168 /// PICBase, set the HiOpFlags and LoOpFlags to the target MO flags.
1169 static bool GetLabelAccessInfo(const TargetMachine &TM, unsigned &HiOpFlags,
1170 unsigned &LoOpFlags, const GlobalValue *GV = 0) {
1171 HiOpFlags = PPCII::MO_HA16;
1172 LoOpFlags = PPCII::MO_LO16;
1174 // Don't use the pic base if not in PIC relocation model. Or if we are on a
1175 // non-darwin platform. We don't support PIC on other platforms yet.
1176 bool isPIC = TM.getRelocationModel() == Reloc::PIC_ &&
1177 TM.getSubtarget<PPCSubtarget>().isDarwin();
1179 HiOpFlags |= PPCII::MO_PIC_FLAG;
1180 LoOpFlags |= PPCII::MO_PIC_FLAG;
1183 // If this is a reference to a global value that requires a non-lazy-ptr, make
1184 // sure that instruction lowering adds it.
1185 if (GV && TM.getSubtarget<PPCSubtarget>().hasLazyResolverStub(GV, TM)) {
1186 HiOpFlags |= PPCII::MO_NLP_FLAG;
1187 LoOpFlags |= PPCII::MO_NLP_FLAG;
1189 if (GV->hasHiddenVisibility()) {
1190 HiOpFlags |= PPCII::MO_NLP_HIDDEN_FLAG;
1191 LoOpFlags |= PPCII::MO_NLP_HIDDEN_FLAG;
1198 static SDValue LowerLabelRef(SDValue HiPart, SDValue LoPart, bool isPIC,
1199 SelectionDAG &DAG) {
1200 EVT PtrVT = HiPart.getValueType();
1201 SDValue Zero = DAG.getConstant(0, PtrVT);
1202 DebugLoc DL = HiPart.getDebugLoc();
1204 SDValue Hi = DAG.getNode(PPCISD::Hi, DL, PtrVT, HiPart, Zero);
1205 SDValue Lo = DAG.getNode(PPCISD::Lo, DL, PtrVT, LoPart, Zero);
1207 // With PIC, the first instruction is actually "GR+hi(&G)".
1209 Hi = DAG.getNode(ISD::ADD, DL, PtrVT,
1210 DAG.getNode(PPCISD::GlobalBaseReg, DL, PtrVT), Hi);
1212 // Generate non-pic code that has direct accesses to the constant pool.
1213 // The address of the global is just (hi(&g)+lo(&g)).
1214 return DAG.getNode(ISD::ADD, DL, PtrVT, Hi, Lo);
1217 SDValue PPCTargetLowering::LowerConstantPool(SDValue Op,
1218 SelectionDAG &DAG) const {
1219 EVT PtrVT = Op.getValueType();
1220 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
1221 const Constant *C = CP->getConstVal();
1223 // 64-bit SVR4 ABI code is always position-independent.
1224 // The actual address of the GlobalValue is stored in the TOC.
1225 if (PPCSubTarget.isSVR4ABI() && PPCSubTarget.isPPC64()) {
1226 SDValue GA = DAG.getTargetConstantPool(C, PtrVT, CP->getAlignment(), 0);
1227 return DAG.getNode(PPCISD::TOC_ENTRY, CP->getDebugLoc(), MVT::i64, GA,
1228 DAG.getRegister(PPC::X2, MVT::i64));
1231 unsigned MOHiFlag, MOLoFlag;
1232 bool isPIC = GetLabelAccessInfo(DAG.getTarget(), MOHiFlag, MOLoFlag);
1234 DAG.getTargetConstantPool(C, PtrVT, CP->getAlignment(), 0, MOHiFlag);
1236 DAG.getTargetConstantPool(C, PtrVT, CP->getAlignment(), 0, MOLoFlag);
1237 return LowerLabelRef(CPIHi, CPILo, isPIC, DAG);
1240 SDValue PPCTargetLowering::LowerJumpTable(SDValue Op, SelectionDAG &DAG) const {
1241 EVT PtrVT = Op.getValueType();
1242 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
1244 // 64-bit SVR4 ABI code is always position-independent.
1245 // The actual address of the GlobalValue is stored in the TOC.
1246 if (PPCSubTarget.isSVR4ABI() && PPCSubTarget.isPPC64()) {
1247 SDValue GA = DAG.getTargetJumpTable(JT->getIndex(), PtrVT);
1248 return DAG.getNode(PPCISD::TOC_ENTRY, JT->getDebugLoc(), MVT::i64, GA,
1249 DAG.getRegister(PPC::X2, MVT::i64));
1252 unsigned MOHiFlag, MOLoFlag;
1253 bool isPIC = GetLabelAccessInfo(DAG.getTarget(), MOHiFlag, MOLoFlag);
1254 SDValue JTIHi = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MOHiFlag);
1255 SDValue JTILo = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MOLoFlag);
1256 return LowerLabelRef(JTIHi, JTILo, isPIC, DAG);
1259 SDValue PPCTargetLowering::LowerBlockAddress(SDValue Op,
1260 SelectionDAG &DAG) const {
1261 EVT PtrVT = Op.getValueType();
1263 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
1265 unsigned MOHiFlag, MOLoFlag;
1266 bool isPIC = GetLabelAccessInfo(DAG.getTarget(), MOHiFlag, MOLoFlag);
1267 SDValue TgtBAHi = DAG.getTargetBlockAddress(BA, PtrVT, 0, MOHiFlag);
1268 SDValue TgtBALo = DAG.getTargetBlockAddress(BA, PtrVT, 0, MOLoFlag);
1269 return LowerLabelRef(TgtBAHi, TgtBALo, isPIC, DAG);
1272 SDValue PPCTargetLowering::LowerGlobalTLSAddress(SDValue Op,
1273 SelectionDAG &DAG) const {
1275 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
1276 DebugLoc dl = GA->getDebugLoc();
1277 const GlobalValue *GV = GA->getGlobal();
1278 EVT PtrVT = getPointerTy();
1279 bool is64bit = PPCSubTarget.isPPC64();
1281 TLSModel::Model model = getTargetMachine().getTLSModel(GV);
1283 SDValue TGAHi = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1284 PPCII::MO_TPREL16_HA);
1285 SDValue TGALo = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1286 PPCII::MO_TPREL16_LO);
1288 if (model != TLSModel::LocalExec)
1289 llvm_unreachable("only local-exec TLS mode supported");
1290 SDValue TLSReg = DAG.getRegister(is64bit ? PPC::X13 : PPC::R2,
1291 is64bit ? MVT::i64 : MVT::i32);
1292 SDValue Hi = DAG.getNode(PPCISD::Hi, dl, PtrVT, TGAHi, TLSReg);
1293 return DAG.getNode(PPCISD::Lo, dl, PtrVT, TGALo, Hi);
1296 SDValue PPCTargetLowering::LowerGlobalAddress(SDValue Op,
1297 SelectionDAG &DAG) const {
1298 EVT PtrVT = Op.getValueType();
1299 GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op);
1300 DebugLoc DL = GSDN->getDebugLoc();
1301 const GlobalValue *GV = GSDN->getGlobal();
1303 // 64-bit SVR4 ABI code is always position-independent.
1304 // The actual address of the GlobalValue is stored in the TOC.
1305 if (PPCSubTarget.isSVR4ABI() && PPCSubTarget.isPPC64()) {
1306 SDValue GA = DAG.getTargetGlobalAddress(GV, DL, PtrVT, GSDN->getOffset());
1307 return DAG.getNode(PPCISD::TOC_ENTRY, DL, MVT::i64, GA,
1308 DAG.getRegister(PPC::X2, MVT::i64));
1311 unsigned MOHiFlag, MOLoFlag;
1312 bool isPIC = GetLabelAccessInfo(DAG.getTarget(), MOHiFlag, MOLoFlag, GV);
1315 DAG.getTargetGlobalAddress(GV, DL, PtrVT, GSDN->getOffset(), MOHiFlag);
1317 DAG.getTargetGlobalAddress(GV, DL, PtrVT, GSDN->getOffset(), MOLoFlag);
1319 SDValue Ptr = LowerLabelRef(GAHi, GALo, isPIC, DAG);
1321 // If the global reference is actually to a non-lazy-pointer, we have to do an
1322 // extra load to get the address of the global.
1323 if (MOHiFlag & PPCII::MO_NLP_FLAG)
1324 Ptr = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(), Ptr, MachinePointerInfo(),
1325 false, false, false, 0);
1329 SDValue PPCTargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
1330 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
1331 DebugLoc dl = Op.getDebugLoc();
1333 // If we're comparing for equality to zero, expose the fact that this is
1334 // implented as a ctlz/srl pair on ppc, so that the dag combiner can
1335 // fold the new nodes.
1336 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
1337 if (C->isNullValue() && CC == ISD::SETEQ) {
1338 EVT VT = Op.getOperand(0).getValueType();
1339 SDValue Zext = Op.getOperand(0);
1340 if (VT.bitsLT(MVT::i32)) {
1342 Zext = DAG.getNode(ISD::ZERO_EXTEND, dl, VT, Op.getOperand(0));
1344 unsigned Log2b = Log2_32(VT.getSizeInBits());
1345 SDValue Clz = DAG.getNode(ISD::CTLZ, dl, VT, Zext);
1346 SDValue Scc = DAG.getNode(ISD::SRL, dl, VT, Clz,
1347 DAG.getConstant(Log2b, MVT::i32));
1348 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, Scc);
1350 // Leave comparisons against 0 and -1 alone for now, since they're usually
1351 // optimized. FIXME: revisit this when we can custom lower all setcc
1353 if (C->isAllOnesValue() || C->isNullValue())
1357 // If we have an integer seteq/setne, turn it into a compare against zero
1358 // by xor'ing the rhs with the lhs, which is faster than setting a
1359 // condition register, reading it back out, and masking the correct bit. The
1360 // normal approach here uses sub to do this instead of xor. Using xor exposes
1361 // the result to other bit-twiddling opportunities.
1362 EVT LHSVT = Op.getOperand(0).getValueType();
1363 if (LHSVT.isInteger() && (CC == ISD::SETEQ || CC == ISD::SETNE)) {
1364 EVT VT = Op.getValueType();
1365 SDValue Sub = DAG.getNode(ISD::XOR, dl, LHSVT, Op.getOperand(0),
1367 return DAG.getSetCC(dl, VT, Sub, DAG.getConstant(0, LHSVT), CC);
1372 SDValue PPCTargetLowering::LowerVAARG(SDValue Op, SelectionDAG &DAG,
1373 const PPCSubtarget &Subtarget) const {
1374 SDNode *Node = Op.getNode();
1375 EVT VT = Node->getValueType(0);
1376 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1377 SDValue InChain = Node->getOperand(0);
1378 SDValue VAListPtr = Node->getOperand(1);
1379 const Value *SV = cast<SrcValueSDNode>(Node->getOperand(2))->getValue();
1380 DebugLoc dl = Node->getDebugLoc();
1382 assert(!Subtarget.isPPC64() && "LowerVAARG is PPC32 only");
1385 SDValue GprIndex = DAG.getExtLoad(ISD::ZEXTLOAD, dl, MVT::i32, InChain,
1386 VAListPtr, MachinePointerInfo(SV), MVT::i8,
1388 InChain = GprIndex.getValue(1);
1390 if (VT == MVT::i64) {
1391 // Check if GprIndex is even
1392 SDValue GprAnd = DAG.getNode(ISD::AND, dl, MVT::i32, GprIndex,
1393 DAG.getConstant(1, MVT::i32));
1394 SDValue CC64 = DAG.getSetCC(dl, MVT::i32, GprAnd,
1395 DAG.getConstant(0, MVT::i32), ISD::SETNE);
1396 SDValue GprIndexPlusOne = DAG.getNode(ISD::ADD, dl, MVT::i32, GprIndex,
1397 DAG.getConstant(1, MVT::i32));
1398 // Align GprIndex to be even if it isn't
1399 GprIndex = DAG.getNode(ISD::SELECT, dl, MVT::i32, CC64, GprIndexPlusOne,
1403 // fpr index is 1 byte after gpr
1404 SDValue FprPtr = DAG.getNode(ISD::ADD, dl, PtrVT, VAListPtr,
1405 DAG.getConstant(1, MVT::i32));
1408 SDValue FprIndex = DAG.getExtLoad(ISD::ZEXTLOAD, dl, MVT::i32, InChain,
1409 FprPtr, MachinePointerInfo(SV), MVT::i8,
1411 InChain = FprIndex.getValue(1);
1413 SDValue RegSaveAreaPtr = DAG.getNode(ISD::ADD, dl, PtrVT, VAListPtr,
1414 DAG.getConstant(8, MVT::i32));
1416 SDValue OverflowAreaPtr = DAG.getNode(ISD::ADD, dl, PtrVT, VAListPtr,
1417 DAG.getConstant(4, MVT::i32));
1420 SDValue OverflowArea = DAG.getLoad(MVT::i32, dl, InChain, OverflowAreaPtr,
1421 MachinePointerInfo(), false, false,
1423 InChain = OverflowArea.getValue(1);
1425 SDValue RegSaveArea = DAG.getLoad(MVT::i32, dl, InChain, RegSaveAreaPtr,
1426 MachinePointerInfo(), false, false,
1428 InChain = RegSaveArea.getValue(1);
1430 // select overflow_area if index > 8
1431 SDValue CC = DAG.getSetCC(dl, MVT::i32, VT.isInteger() ? GprIndex : FprIndex,
1432 DAG.getConstant(8, MVT::i32), ISD::SETLT);
1434 // adjustment constant gpr_index * 4/8
1435 SDValue RegConstant = DAG.getNode(ISD::MUL, dl, MVT::i32,
1436 VT.isInteger() ? GprIndex : FprIndex,
1437 DAG.getConstant(VT.isInteger() ? 4 : 8,
1440 // OurReg = RegSaveArea + RegConstant
1441 SDValue OurReg = DAG.getNode(ISD::ADD, dl, PtrVT, RegSaveArea,
1444 // Floating types are 32 bytes into RegSaveArea
1445 if (VT.isFloatingPoint())
1446 OurReg = DAG.getNode(ISD::ADD, dl, PtrVT, OurReg,
1447 DAG.getConstant(32, MVT::i32));
1449 // increase {f,g}pr_index by 1 (or 2 if VT is i64)
1450 SDValue IndexPlus1 = DAG.getNode(ISD::ADD, dl, MVT::i32,
1451 VT.isInteger() ? GprIndex : FprIndex,
1452 DAG.getConstant(VT == MVT::i64 ? 2 : 1,
1455 InChain = DAG.getTruncStore(InChain, dl, IndexPlus1,
1456 VT.isInteger() ? VAListPtr : FprPtr,
1457 MachinePointerInfo(SV),
1458 MVT::i8, false, false, 0);
1460 // determine if we should load from reg_save_area or overflow_area
1461 SDValue Result = DAG.getNode(ISD::SELECT, dl, PtrVT, CC, OurReg, OverflowArea);
1463 // increase overflow_area by 4/8 if gpr/fpr > 8
1464 SDValue OverflowAreaPlusN = DAG.getNode(ISD::ADD, dl, PtrVT, OverflowArea,
1465 DAG.getConstant(VT.isInteger() ? 4 : 8,
1468 OverflowArea = DAG.getNode(ISD::SELECT, dl, MVT::i32, CC, OverflowArea,
1471 InChain = DAG.getTruncStore(InChain, dl, OverflowArea,
1473 MachinePointerInfo(),
1474 MVT::i32, false, false, 0);
1476 return DAG.getLoad(VT, dl, InChain, Result, MachinePointerInfo(),
1477 false, false, false, 0);
1480 SDValue PPCTargetLowering::LowerADJUST_TRAMPOLINE(SDValue Op,
1481 SelectionDAG &DAG) const {
1482 return Op.getOperand(0);
1485 SDValue PPCTargetLowering::LowerINIT_TRAMPOLINE(SDValue Op,
1486 SelectionDAG &DAG) const {
1487 SDValue Chain = Op.getOperand(0);
1488 SDValue Trmp = Op.getOperand(1); // trampoline
1489 SDValue FPtr = Op.getOperand(2); // nested function
1490 SDValue Nest = Op.getOperand(3); // 'nest' parameter value
1491 DebugLoc dl = Op.getDebugLoc();
1493 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1494 bool isPPC64 = (PtrVT == MVT::i64);
1496 DAG.getTargetLoweringInfo().getTargetData()->getIntPtrType(
1499 TargetLowering::ArgListTy Args;
1500 TargetLowering::ArgListEntry Entry;
1502 Entry.Ty = IntPtrTy;
1503 Entry.Node = Trmp; Args.push_back(Entry);
1505 // TrampSize == (isPPC64 ? 48 : 40);
1506 Entry.Node = DAG.getConstant(isPPC64 ? 48 : 40,
1507 isPPC64 ? MVT::i64 : MVT::i32);
1508 Args.push_back(Entry);
1510 Entry.Node = FPtr; Args.push_back(Entry);
1511 Entry.Node = Nest; Args.push_back(Entry);
1513 // Lower to a call to __trampoline_setup(Trmp, TrampSize, FPtr, ctx_reg)
1514 TargetLowering::CallLoweringInfo CLI(Chain,
1515 Type::getVoidTy(*DAG.getContext()),
1516 false, false, false, false, 0,
1518 /*isTailCall=*/false,
1519 /*doesNotRet=*/false,
1520 /*isReturnValueUsed=*/true,
1521 DAG.getExternalSymbol("__trampoline_setup", PtrVT),
1523 std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI);
1525 return CallResult.second;
1528 SDValue PPCTargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG,
1529 const PPCSubtarget &Subtarget) const {
1530 MachineFunction &MF = DAG.getMachineFunction();
1531 PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
1533 DebugLoc dl = Op.getDebugLoc();
1535 if (Subtarget.isDarwinABI() || Subtarget.isPPC64()) {
1536 // vastart just stores the address of the VarArgsFrameIndex slot into the
1537 // memory location argument.
1538 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1539 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);
1540 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
1541 return DAG.getStore(Op.getOperand(0), dl, FR, Op.getOperand(1),
1542 MachinePointerInfo(SV),
1546 // For the 32-bit SVR4 ABI we follow the layout of the va_list struct.
1547 // We suppose the given va_list is already allocated.
1550 // char gpr; /* index into the array of 8 GPRs
1551 // * stored in the register save area
1552 // * gpr=0 corresponds to r3,
1553 // * gpr=1 to r4, etc.
1555 // char fpr; /* index into the array of 8 FPRs
1556 // * stored in the register save area
1557 // * fpr=0 corresponds to f1,
1558 // * fpr=1 to f2, etc.
1560 // char *overflow_arg_area;
1561 // /* location on stack that holds
1562 // * the next overflow argument
1564 // char *reg_save_area;
1565 // /* where r3:r10 and f1:f8 (if saved)
1571 SDValue ArgGPR = DAG.getConstant(FuncInfo->getVarArgsNumGPR(), MVT::i32);
1572 SDValue ArgFPR = DAG.getConstant(FuncInfo->getVarArgsNumFPR(), MVT::i32);
1575 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1577 SDValue StackOffsetFI = DAG.getFrameIndex(FuncInfo->getVarArgsStackOffset(),
1579 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
1582 uint64_t FrameOffset = PtrVT.getSizeInBits()/8;
1583 SDValue ConstFrameOffset = DAG.getConstant(FrameOffset, PtrVT);
1585 uint64_t StackOffset = PtrVT.getSizeInBits()/8 - 1;
1586 SDValue ConstStackOffset = DAG.getConstant(StackOffset, PtrVT);
1588 uint64_t FPROffset = 1;
1589 SDValue ConstFPROffset = DAG.getConstant(FPROffset, PtrVT);
1591 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
1593 // Store first byte : number of int regs
1594 SDValue firstStore = DAG.getTruncStore(Op.getOperand(0), dl, ArgGPR,
1596 MachinePointerInfo(SV),
1597 MVT::i8, false, false, 0);
1598 uint64_t nextOffset = FPROffset;
1599 SDValue nextPtr = DAG.getNode(ISD::ADD, dl, PtrVT, Op.getOperand(1),
1602 // Store second byte : number of float regs
1603 SDValue secondStore =
1604 DAG.getTruncStore(firstStore, dl, ArgFPR, nextPtr,
1605 MachinePointerInfo(SV, nextOffset), MVT::i8,
1607 nextOffset += StackOffset;
1608 nextPtr = DAG.getNode(ISD::ADD, dl, PtrVT, nextPtr, ConstStackOffset);
1610 // Store second word : arguments given on stack
1611 SDValue thirdStore =
1612 DAG.getStore(secondStore, dl, StackOffsetFI, nextPtr,
1613 MachinePointerInfo(SV, nextOffset),
1615 nextOffset += FrameOffset;
1616 nextPtr = DAG.getNode(ISD::ADD, dl, PtrVT, nextPtr, ConstFrameOffset);
1618 // Store third word : arguments given in registers
1619 return DAG.getStore(thirdStore, dl, FR, nextPtr,
1620 MachinePointerInfo(SV, nextOffset),
1625 #include "PPCGenCallingConv.inc"
1627 static bool CC_PPC_SVR4_Custom_Dummy(unsigned &ValNo, MVT &ValVT, MVT &LocVT,
1628 CCValAssign::LocInfo &LocInfo,
1629 ISD::ArgFlagsTy &ArgFlags,
1634 static bool CC_PPC_SVR4_Custom_AlignArgRegs(unsigned &ValNo, MVT &ValVT,
1636 CCValAssign::LocInfo &LocInfo,
1637 ISD::ArgFlagsTy &ArgFlags,
1639 static const uint16_t ArgRegs[] = {
1640 PPC::R3, PPC::R4, PPC::R5, PPC::R6,
1641 PPC::R7, PPC::R8, PPC::R9, PPC::R10,
1643 const unsigned NumArgRegs = array_lengthof(ArgRegs);
1645 unsigned RegNum = State.getFirstUnallocated(ArgRegs, NumArgRegs);
1647 // Skip one register if the first unallocated register has an even register
1648 // number and there are still argument registers available which have not been
1649 // allocated yet. RegNum is actually an index into ArgRegs, which means we
1650 // need to skip a register if RegNum is odd.
1651 if (RegNum != NumArgRegs && RegNum % 2 == 1) {
1652 State.AllocateReg(ArgRegs[RegNum]);
1655 // Always return false here, as this function only makes sure that the first
1656 // unallocated register has an odd register number and does not actually
1657 // allocate a register for the current argument.
1661 static bool CC_PPC_SVR4_Custom_AlignFPArgRegs(unsigned &ValNo, MVT &ValVT,
1663 CCValAssign::LocInfo &LocInfo,
1664 ISD::ArgFlagsTy &ArgFlags,
1666 static const uint16_t ArgRegs[] = {
1667 PPC::F1, PPC::F2, PPC::F3, PPC::F4, PPC::F5, PPC::F6, PPC::F7,
1671 const unsigned NumArgRegs = array_lengthof(ArgRegs);
1673 unsigned RegNum = State.getFirstUnallocated(ArgRegs, NumArgRegs);
1675 // If there is only one Floating-point register left we need to put both f64
1676 // values of a split ppc_fp128 value on the stack.
1677 if (RegNum != NumArgRegs && ArgRegs[RegNum] == PPC::F8) {
1678 State.AllocateReg(ArgRegs[RegNum]);
1681 // Always return false here, as this function only makes sure that the two f64
1682 // values a ppc_fp128 value is split into are both passed in registers or both
1683 // passed on the stack and does not actually allocate a register for the
1684 // current argument.
1688 /// GetFPR - Get the set of FP registers that should be allocated for arguments,
1690 static const uint16_t *GetFPR() {
1691 static const uint16_t FPR[] = {
1692 PPC::F1, PPC::F2, PPC::F3, PPC::F4, PPC::F5, PPC::F6, PPC::F7,
1693 PPC::F8, PPC::F9, PPC::F10, PPC::F11, PPC::F12, PPC::F13
1699 /// CalculateStackSlotSize - Calculates the size reserved for this argument on
1701 static unsigned CalculateStackSlotSize(EVT ArgVT, ISD::ArgFlagsTy Flags,
1702 unsigned PtrByteSize) {
1703 unsigned ArgSize = ArgVT.getSizeInBits()/8;
1704 if (Flags.isByVal())
1705 ArgSize = Flags.getByValSize();
1706 ArgSize = ((ArgSize + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
1712 PPCTargetLowering::LowerFormalArguments(SDValue Chain,
1713 CallingConv::ID CallConv, bool isVarArg,
1714 const SmallVectorImpl<ISD::InputArg>
1716 DebugLoc dl, SelectionDAG &DAG,
1717 SmallVectorImpl<SDValue> &InVals)
1719 if (PPCSubTarget.isSVR4ABI() && !PPCSubTarget.isPPC64()) {
1720 return LowerFormalArguments_32SVR4(Chain, CallConv, isVarArg, Ins,
1723 return LowerFormalArguments_Darwin_Or_64SVR4(Chain, CallConv, isVarArg, Ins,
1729 PPCTargetLowering::LowerFormalArguments_32SVR4(
1731 CallingConv::ID CallConv, bool isVarArg,
1732 const SmallVectorImpl<ISD::InputArg>
1734 DebugLoc dl, SelectionDAG &DAG,
1735 SmallVectorImpl<SDValue> &InVals) const {
1737 // 32-bit SVR4 ABI Stack Frame Layout:
1738 // +-----------------------------------+
1739 // +--> | Back chain |
1740 // | +-----------------------------------+
1741 // | | Floating-point register save area |
1742 // | +-----------------------------------+
1743 // | | General register save area |
1744 // | +-----------------------------------+
1745 // | | CR save word |
1746 // | +-----------------------------------+
1747 // | | VRSAVE save word |
1748 // | +-----------------------------------+
1749 // | | Alignment padding |
1750 // | +-----------------------------------+
1751 // | | Vector register save area |
1752 // | +-----------------------------------+
1753 // | | Local variable space |
1754 // | +-----------------------------------+
1755 // | | Parameter list area |
1756 // | +-----------------------------------+
1757 // | | LR save word |
1758 // | +-----------------------------------+
1759 // SP--> +--- | Back chain |
1760 // +-----------------------------------+
1763 // System V Application Binary Interface PowerPC Processor Supplement
1764 // AltiVec Technology Programming Interface Manual
1766 MachineFunction &MF = DAG.getMachineFunction();
1767 MachineFrameInfo *MFI = MF.getFrameInfo();
1768 PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
1770 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1771 // Potential tail calls could cause overwriting of argument stack slots.
1772 bool isImmutable = !(getTargetMachine().Options.GuaranteedTailCallOpt &&
1773 (CallConv == CallingConv::Fast));
1774 unsigned PtrByteSize = 4;
1776 // Assign locations to all of the incoming arguments.
1777 SmallVector<CCValAssign, 16> ArgLocs;
1778 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1779 getTargetMachine(), ArgLocs, *DAG.getContext());
1781 // Reserve space for the linkage area on the stack.
1782 CCInfo.AllocateStack(PPCFrameLowering::getLinkageSize(false, false), PtrByteSize);
1784 CCInfo.AnalyzeFormalArguments(Ins, CC_PPC_SVR4);
1786 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
1787 CCValAssign &VA = ArgLocs[i];
1789 // Arguments stored in registers.
1790 if (VA.isRegLoc()) {
1791 const TargetRegisterClass *RC;
1792 EVT ValVT = VA.getValVT();
1794 switch (ValVT.getSimpleVT().SimpleTy) {
1796 llvm_unreachable("ValVT not supported by formal arguments Lowering");
1798 RC = &PPC::GPRCRegClass;
1801 RC = &PPC::F4RCRegClass;
1804 RC = &PPC::F8RCRegClass;
1810 RC = &PPC::VRRCRegClass;
1814 // Transform the arguments stored in physical registers into virtual ones.
1815 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
1816 SDValue ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, ValVT);
1818 InVals.push_back(ArgValue);
1820 // Argument stored in memory.
1821 assert(VA.isMemLoc());
1823 unsigned ArgSize = VA.getLocVT().getSizeInBits() / 8;
1824 int FI = MFI->CreateFixedObject(ArgSize, VA.getLocMemOffset(),
1827 // Create load nodes to retrieve arguments from the stack.
1828 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
1829 InVals.push_back(DAG.getLoad(VA.getValVT(), dl, Chain, FIN,
1830 MachinePointerInfo(),
1831 false, false, false, 0));
1835 // Assign locations to all of the incoming aggregate by value arguments.
1836 // Aggregates passed by value are stored in the local variable space of the
1837 // caller's stack frame, right above the parameter list area.
1838 SmallVector<CCValAssign, 16> ByValArgLocs;
1839 CCState CCByValInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1840 getTargetMachine(), ByValArgLocs, *DAG.getContext());
1842 // Reserve stack space for the allocations in CCInfo.
1843 CCByValInfo.AllocateStack(CCInfo.getNextStackOffset(), PtrByteSize);
1845 CCByValInfo.AnalyzeFormalArguments(Ins, CC_PPC_SVR4_ByVal);
1847 // Area that is at least reserved in the caller of this function.
1848 unsigned MinReservedArea = CCByValInfo.getNextStackOffset();
1850 // Set the size that is at least reserved in caller of this function. Tail
1851 // call optimized function's reserved stack space needs to be aligned so that
1852 // taking the difference between two stack areas will result in an aligned
1854 PPCFunctionInfo *FI = MF.getInfo<PPCFunctionInfo>();
1857 std::max(MinReservedArea,
1858 PPCFrameLowering::getMinCallFrameSize(false, false));
1860 unsigned TargetAlign = DAG.getMachineFunction().getTarget().getFrameLowering()->
1861 getStackAlignment();
1862 unsigned AlignMask = TargetAlign-1;
1863 MinReservedArea = (MinReservedArea + AlignMask) & ~AlignMask;
1865 FI->setMinReservedArea(MinReservedArea);
1867 SmallVector<SDValue, 8> MemOps;
1869 // If the function takes variable number of arguments, make a frame index for
1870 // the start of the first vararg value... for expansion of llvm.va_start.
1872 static const uint16_t GPArgRegs[] = {
1873 PPC::R3, PPC::R4, PPC::R5, PPC::R6,
1874 PPC::R7, PPC::R8, PPC::R9, PPC::R10,
1876 const unsigned NumGPArgRegs = array_lengthof(GPArgRegs);
1878 static const uint16_t FPArgRegs[] = {
1879 PPC::F1, PPC::F2, PPC::F3, PPC::F4, PPC::F5, PPC::F6, PPC::F7,
1882 const unsigned NumFPArgRegs = array_lengthof(FPArgRegs);
1884 FuncInfo->setVarArgsNumGPR(CCInfo.getFirstUnallocated(GPArgRegs,
1886 FuncInfo->setVarArgsNumFPR(CCInfo.getFirstUnallocated(FPArgRegs,
1889 // Make room for NumGPArgRegs and NumFPArgRegs.
1890 int Depth = NumGPArgRegs * PtrVT.getSizeInBits()/8 +
1891 NumFPArgRegs * EVT(MVT::f64).getSizeInBits()/8;
1893 FuncInfo->setVarArgsStackOffset(
1894 MFI->CreateFixedObject(PtrVT.getSizeInBits()/8,
1895 CCInfo.getNextStackOffset(), true));
1897 FuncInfo->setVarArgsFrameIndex(MFI->CreateStackObject(Depth, 8, false));
1898 SDValue FIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);
1900 // The fixed integer arguments of a variadic function are stored to the
1901 // VarArgsFrameIndex on the stack so that they may be loaded by deferencing
1902 // the result of va_next.
1903 for (unsigned GPRIndex = 0; GPRIndex != NumGPArgRegs; ++GPRIndex) {
1904 // Get an existing live-in vreg, or add a new one.
1905 unsigned VReg = MF.getRegInfo().getLiveInVirtReg(GPArgRegs[GPRIndex]);
1907 VReg = MF.addLiveIn(GPArgRegs[GPRIndex], &PPC::GPRCRegClass);
1909 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
1910 SDValue Store = DAG.getStore(Val.getValue(1), dl, Val, FIN,
1911 MachinePointerInfo(), false, false, 0);
1912 MemOps.push_back(Store);
1913 // Increment the address by four for the next argument to store
1914 SDValue PtrOff = DAG.getConstant(PtrVT.getSizeInBits()/8, PtrVT);
1915 FIN = DAG.getNode(ISD::ADD, dl, PtrOff.getValueType(), FIN, PtrOff);
1918 // FIXME 32-bit SVR4: We only need to save FP argument registers if CR bit 6
1920 // The double arguments are stored to the VarArgsFrameIndex
1922 for (unsigned FPRIndex = 0; FPRIndex != NumFPArgRegs; ++FPRIndex) {
1923 // Get an existing live-in vreg, or add a new one.
1924 unsigned VReg = MF.getRegInfo().getLiveInVirtReg(FPArgRegs[FPRIndex]);
1926 VReg = MF.addLiveIn(FPArgRegs[FPRIndex], &PPC::F8RCRegClass);
1928 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::f64);
1929 SDValue Store = DAG.getStore(Val.getValue(1), dl, Val, FIN,
1930 MachinePointerInfo(), false, false, 0);
1931 MemOps.push_back(Store);
1932 // Increment the address by eight for the next argument to store
1933 SDValue PtrOff = DAG.getConstant(EVT(MVT::f64).getSizeInBits()/8,
1935 FIN = DAG.getNode(ISD::ADD, dl, PtrOff.getValueType(), FIN, PtrOff);
1939 if (!MemOps.empty())
1940 Chain = DAG.getNode(ISD::TokenFactor, dl,
1941 MVT::Other, &MemOps[0], MemOps.size());
1947 PPCTargetLowering::LowerFormalArguments_Darwin_Or_64SVR4(
1949 CallingConv::ID CallConv, bool isVarArg,
1950 const SmallVectorImpl<ISD::InputArg>
1952 DebugLoc dl, SelectionDAG &DAG,
1953 SmallVectorImpl<SDValue> &InVals) const {
1954 // TODO: add description of PPC stack frame format, or at least some docs.
1956 MachineFunction &MF = DAG.getMachineFunction();
1957 MachineFrameInfo *MFI = MF.getFrameInfo();
1958 PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
1960 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1961 bool isPPC64 = PtrVT == MVT::i64;
1962 bool isSVR4ABI = PPCSubTarget.isSVR4ABI();
1963 // Potential tail calls could cause overwriting of argument stack slots.
1964 bool isImmutable = !(getTargetMachine().Options.GuaranteedTailCallOpt &&
1965 (CallConv == CallingConv::Fast));
1966 unsigned PtrByteSize = isPPC64 ? 8 : 4;
1968 unsigned ArgOffset = PPCFrameLowering::getLinkageSize(isPPC64, true);
1969 // Area that is at least reserved in caller of this function.
1970 unsigned MinReservedArea = ArgOffset;
1972 static const uint16_t GPR_32[] = { // 32-bit registers.
1973 PPC::R3, PPC::R4, PPC::R5, PPC::R6,
1974 PPC::R7, PPC::R8, PPC::R9, PPC::R10,
1976 static const uint16_t GPR_64[] = { // 64-bit registers.
1977 PPC::X3, PPC::X4, PPC::X5, PPC::X6,
1978 PPC::X7, PPC::X8, PPC::X9, PPC::X10,
1981 static const uint16_t *FPR = GetFPR();
1983 static const uint16_t VR[] = {
1984 PPC::V2, PPC::V3, PPC::V4, PPC::V5, PPC::V6, PPC::V7, PPC::V8,
1985 PPC::V9, PPC::V10, PPC::V11, PPC::V12, PPC::V13
1988 const unsigned Num_GPR_Regs = array_lengthof(GPR_32);
1989 const unsigned Num_FPR_Regs = 13;
1990 const unsigned Num_VR_Regs = array_lengthof( VR);
1992 unsigned GPR_idx = 0, FPR_idx = 0, VR_idx = 0;
1994 const uint16_t *GPR = isPPC64 ? GPR_64 : GPR_32;
1996 // In 32-bit non-varargs functions, the stack space for vectors is after the
1997 // stack space for non-vectors. We do not use this space unless we have
1998 // too many vectors to fit in registers, something that only occurs in
1999 // constructed examples:), but we have to walk the arglist to figure
2000 // that out...for the pathological case, compute VecArgOffset as the
2001 // start of the vector parameter area. Computing VecArgOffset is the
2002 // entire point of the following loop.
2003 unsigned VecArgOffset = ArgOffset;
2004 if (!isVarArg && !isPPC64) {
2005 for (unsigned ArgNo = 0, e = Ins.size(); ArgNo != e;
2007 EVT ObjectVT = Ins[ArgNo].VT;
2008 ISD::ArgFlagsTy Flags = Ins[ArgNo].Flags;
2010 if (Flags.isByVal()) {
2011 // ObjSize is the true size, ArgSize rounded up to multiple of regs.
2012 unsigned ObjSize = Flags.getByValSize();
2014 ((ObjSize + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
2015 VecArgOffset += ArgSize;
2019 switch(ObjectVT.getSimpleVT().SimpleTy) {
2020 default: llvm_unreachable("Unhandled argument type!");
2025 case MVT::i64: // PPC64
2027 // FIXME: We are guaranteed to be !isPPC64 at this point.
2028 // Does MVT::i64 apply?
2035 // Nothing to do, we're only looking at Nonvector args here.
2040 // We've found where the vector parameter area in memory is. Skip the
2041 // first 12 parameters; these don't use that memory.
2042 VecArgOffset = ((VecArgOffset+15)/16)*16;
2043 VecArgOffset += 12*16;
2045 // Add DAG nodes to load the arguments or copy them out of registers. On
2046 // entry to a function on PPC, the arguments start after the linkage area,
2047 // although the first ones are often in registers.
2049 SmallVector<SDValue, 8> MemOps;
2050 unsigned nAltivecParamsAtEnd = 0;
2051 Function::const_arg_iterator FuncArg = MF.getFunction()->arg_begin();
2052 for (unsigned ArgNo = 0, e = Ins.size(); ArgNo != e; ++ArgNo, ++FuncArg) {
2054 bool needsLoad = false;
2055 EVT ObjectVT = Ins[ArgNo].VT;
2056 unsigned ObjSize = ObjectVT.getSizeInBits()/8;
2057 unsigned ArgSize = ObjSize;
2058 ISD::ArgFlagsTy Flags = Ins[ArgNo].Flags;
2060 unsigned CurArgOffset = ArgOffset;
2062 // Varargs or 64 bit Altivec parameters are padded to a 16 byte boundary.
2063 if (ObjectVT==MVT::v4f32 || ObjectVT==MVT::v4i32 ||
2064 ObjectVT==MVT::v8i16 || ObjectVT==MVT::v16i8) {
2065 if (isVarArg || isPPC64) {
2066 MinReservedArea = ((MinReservedArea+15)/16)*16;
2067 MinReservedArea += CalculateStackSlotSize(ObjectVT,
2070 } else nAltivecParamsAtEnd++;
2072 // Calculate min reserved area.
2073 MinReservedArea += CalculateStackSlotSize(Ins[ArgNo].VT,
2077 // FIXME the codegen can be much improved in some cases.
2078 // We do not have to keep everything in memory.
2079 if (Flags.isByVal()) {
2080 // ObjSize is the true size, ArgSize rounded up to multiple of registers.
2081 ObjSize = Flags.getByValSize();
2082 ArgSize = ((ObjSize + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
2083 // FOR DARWIN: Objects of size 1 and 2 are right justified, everything
2084 // else is left justified. This means the memory address is adjusted
2086 // FOR 64-BIT SVR4: All aggregates smaller than 8 bytes must be passed
2088 if (ObjSize==1 || ObjSize==2) {
2089 CurArgOffset = CurArgOffset + (4 - ObjSize);
2091 // The value of the object is its address.
2092 int FI = MFI->CreateFixedObject(ObjSize, CurArgOffset, true);
2093 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
2094 InVals.push_back(FIN);
2095 if (ObjSize==1 || ObjSize==2 ||
2096 (ObjSize==4 && isSVR4ABI)) {
2097 if (GPR_idx != Num_GPR_Regs) {
2100 VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
2102 VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::GPRCRegClass);
2103 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
2104 EVT ObjType = (ObjSize == 1 ? MVT::i8 :
2105 (ObjSize == 2 ? MVT::i16 : MVT::i32));
2106 SDValue Store = DAG.getTruncStore(Val.getValue(1), dl, Val, FIN,
2107 MachinePointerInfo(FuncArg,
2109 ObjType, false, false, 0);
2110 MemOps.push_back(Store);
2114 ArgOffset += PtrByteSize;
2118 for (unsigned j = 0; j < ArgSize; j += PtrByteSize) {
2119 // Store whatever pieces of the object are in registers
2120 // to memory. ArgOffset will be the address of the beginning
2122 if (GPR_idx != Num_GPR_Regs) {
2125 VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
2127 VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::GPRCRegClass);
2128 int FI = MFI->CreateFixedObject(PtrByteSize, ArgOffset, true);
2129 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
2130 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
2131 SDValue Shifted = Val;
2133 // For 64-bit SVR4, small structs come in right-adjusted.
2134 // Shift them left so the following logic works as expected.
2135 if (ObjSize < 8 && isSVR4ABI) {
2136 SDValue ShiftAmt = DAG.getConstant(64 - 8 * ObjSize, PtrVT);
2137 Shifted = DAG.getNode(ISD::SHL, dl, PtrVT, Val, ShiftAmt);
2140 SDValue Store = DAG.getStore(Val.getValue(1), dl, Shifted, FIN,
2141 MachinePointerInfo(FuncArg, ArgOffset),
2143 MemOps.push_back(Store);
2145 ArgOffset += PtrByteSize;
2147 ArgOffset += ArgSize - (ArgOffset-CurArgOffset);
2154 switch (ObjectVT.getSimpleVT().SimpleTy) {
2155 default: llvm_unreachable("Unhandled argument type!");
2158 if (GPR_idx != Num_GPR_Regs) {
2159 unsigned VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::GPRCRegClass);
2160 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i32);
2164 ArgSize = PtrByteSize;
2166 // All int arguments reserve stack space in the Darwin ABI.
2167 ArgOffset += PtrByteSize;
2171 case MVT::i64: // PPC64
2172 if (GPR_idx != Num_GPR_Regs) {
2173 unsigned VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
2174 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);
2176 if (ObjectVT == MVT::i32) {
2177 // PPC64 passes i8, i16, and i32 values in i64 registers. Promote
2178 // value to MVT::i64 and then truncate to the correct register size.
2180 ArgVal = DAG.getNode(ISD::AssertSext, dl, MVT::i64, ArgVal,
2181 DAG.getValueType(ObjectVT));
2182 else if (Flags.isZExt())
2183 ArgVal = DAG.getNode(ISD::AssertZext, dl, MVT::i64, ArgVal,
2184 DAG.getValueType(ObjectVT));
2186 ArgVal = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, ArgVal);
2192 ArgSize = PtrByteSize;
2194 // All int arguments reserve stack space in the Darwin ABI.
2200 // Every 4 bytes of argument space consumes one of the GPRs available for
2201 // argument passing.
2202 if (GPR_idx != Num_GPR_Regs) {
2204 if (ObjSize == 8 && GPR_idx != Num_GPR_Regs && !isPPC64)
2207 if (FPR_idx != Num_FPR_Regs) {
2210 if (ObjectVT == MVT::f32)
2211 VReg = MF.addLiveIn(FPR[FPR_idx], &PPC::F4RCRegClass);
2213 VReg = MF.addLiveIn(FPR[FPR_idx], &PPC::F8RCRegClass);
2215 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, ObjectVT);
2221 // All FP arguments reserve stack space in the Darwin ABI.
2222 ArgOffset += isPPC64 ? 8 : ObjSize;
2228 // Note that vector arguments in registers don't reserve stack space,
2229 // except in varargs functions.
2230 if (VR_idx != Num_VR_Regs) {
2231 unsigned VReg = MF.addLiveIn(VR[VR_idx], &PPC::VRRCRegClass);
2232 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, ObjectVT);
2234 while ((ArgOffset % 16) != 0) {
2235 ArgOffset += PtrByteSize;
2236 if (GPR_idx != Num_GPR_Regs)
2240 GPR_idx = std::min(GPR_idx+4, Num_GPR_Regs); // FIXME correct for ppc64?
2244 if (!isVarArg && !isPPC64) {
2245 // Vectors go after all the nonvectors.
2246 CurArgOffset = VecArgOffset;
2249 // Vectors are aligned.
2250 ArgOffset = ((ArgOffset+15)/16)*16;
2251 CurArgOffset = ArgOffset;
2259 // We need to load the argument to a virtual register if we determined above
2260 // that we ran out of physical registers of the appropriate type.
2262 int FI = MFI->CreateFixedObject(ObjSize,
2263 CurArgOffset + (ArgSize - ObjSize),
2265 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
2266 ArgVal = DAG.getLoad(ObjectVT, dl, Chain, FIN, MachinePointerInfo(),
2267 false, false, false, 0);
2270 InVals.push_back(ArgVal);
2273 // Set the size that is at least reserved in caller of this function. Tail
2274 // call optimized function's reserved stack space needs to be aligned so that
2275 // taking the difference between two stack areas will result in an aligned
2277 PPCFunctionInfo *FI = MF.getInfo<PPCFunctionInfo>();
2278 // Add the Altivec parameters at the end, if needed.
2279 if (nAltivecParamsAtEnd) {
2280 MinReservedArea = ((MinReservedArea+15)/16)*16;
2281 MinReservedArea += 16*nAltivecParamsAtEnd;
2284 std::max(MinReservedArea,
2285 PPCFrameLowering::getMinCallFrameSize(isPPC64, true));
2286 unsigned TargetAlign = DAG.getMachineFunction().getTarget().getFrameLowering()->
2287 getStackAlignment();
2288 unsigned AlignMask = TargetAlign-1;
2289 MinReservedArea = (MinReservedArea + AlignMask) & ~AlignMask;
2290 FI->setMinReservedArea(MinReservedArea);
2292 // If the function takes variable number of arguments, make a frame index for
2293 // the start of the first vararg value... for expansion of llvm.va_start.
2295 int Depth = ArgOffset;
2297 FuncInfo->setVarArgsFrameIndex(
2298 MFI->CreateFixedObject(PtrVT.getSizeInBits()/8,
2300 SDValue FIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);
2302 // If this function is vararg, store any remaining integer argument regs
2303 // to their spots on the stack so that they may be loaded by deferencing the
2304 // result of va_next.
2305 for (; GPR_idx != Num_GPR_Regs; ++GPR_idx) {
2309 VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
2311 VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::GPRCRegClass);
2313 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
2314 SDValue Store = DAG.getStore(Val.getValue(1), dl, Val, FIN,
2315 MachinePointerInfo(), false, false, 0);
2316 MemOps.push_back(Store);
2317 // Increment the address by four for the next argument to store
2318 SDValue PtrOff = DAG.getConstant(PtrVT.getSizeInBits()/8, PtrVT);
2319 FIN = DAG.getNode(ISD::ADD, dl, PtrOff.getValueType(), FIN, PtrOff);
2323 if (!MemOps.empty())
2324 Chain = DAG.getNode(ISD::TokenFactor, dl,
2325 MVT::Other, &MemOps[0], MemOps.size());
2330 /// CalculateParameterAndLinkageAreaSize - Get the size of the parameter plus
2331 /// linkage area for the Darwin ABI, or the 64-bit SVR4 ABI.
2333 CalculateParameterAndLinkageAreaSize(SelectionDAG &DAG,
2337 const SmallVectorImpl<ISD::OutputArg>
2339 const SmallVectorImpl<SDValue> &OutVals,
2340 unsigned &nAltivecParamsAtEnd) {
2341 // Count how many bytes are to be pushed on the stack, including the linkage
2342 // area, and parameter passing area. We start with 24/48 bytes, which is
2343 // prereserved space for [SP][CR][LR][3 x unused].
2344 unsigned NumBytes = PPCFrameLowering::getLinkageSize(isPPC64, true);
2345 unsigned NumOps = Outs.size();
2346 unsigned PtrByteSize = isPPC64 ? 8 : 4;
2348 // Add up all the space actually used.
2349 // In 32-bit non-varargs calls, Altivec parameters all go at the end; usually
2350 // they all go in registers, but we must reserve stack space for them for
2351 // possible use by the caller. In varargs or 64-bit calls, parameters are
2352 // assigned stack space in order, with padding so Altivec parameters are
2354 nAltivecParamsAtEnd = 0;
2355 for (unsigned i = 0; i != NumOps; ++i) {
2356 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2357 EVT ArgVT = Outs[i].VT;
2358 // Varargs Altivec parameters are padded to a 16 byte boundary.
2359 if (ArgVT==MVT::v4f32 || ArgVT==MVT::v4i32 ||
2360 ArgVT==MVT::v8i16 || ArgVT==MVT::v16i8) {
2361 if (!isVarArg && !isPPC64) {
2362 // Non-varargs Altivec parameters go after all the non-Altivec
2363 // parameters; handle those later so we know how much padding we need.
2364 nAltivecParamsAtEnd++;
2367 // Varargs and 64-bit Altivec parameters are padded to 16 byte boundary.
2368 NumBytes = ((NumBytes+15)/16)*16;
2370 NumBytes += CalculateStackSlotSize(ArgVT, Flags, PtrByteSize);
2373 // Allow for Altivec parameters at the end, if needed.
2374 if (nAltivecParamsAtEnd) {
2375 NumBytes = ((NumBytes+15)/16)*16;
2376 NumBytes += 16*nAltivecParamsAtEnd;
2379 // The prolog code of the callee may store up to 8 GPR argument registers to
2380 // the stack, allowing va_start to index over them in memory if its varargs.
2381 // Because we cannot tell if this is needed on the caller side, we have to
2382 // conservatively assume that it is needed. As such, make sure we have at
2383 // least enough stack space for the caller to store the 8 GPRs.
2384 NumBytes = std::max(NumBytes,
2385 PPCFrameLowering::getMinCallFrameSize(isPPC64, true));
2387 // Tail call needs the stack to be aligned.
2388 if (CC == CallingConv::Fast && DAG.getTarget().Options.GuaranteedTailCallOpt){
2389 unsigned TargetAlign = DAG.getMachineFunction().getTarget().
2390 getFrameLowering()->getStackAlignment();
2391 unsigned AlignMask = TargetAlign-1;
2392 NumBytes = (NumBytes + AlignMask) & ~AlignMask;
2398 /// CalculateTailCallSPDiff - Get the amount the stack pointer has to be
2399 /// adjusted to accommodate the arguments for the tailcall.
2400 static int CalculateTailCallSPDiff(SelectionDAG& DAG, bool isTailCall,
2401 unsigned ParamSize) {
2403 if (!isTailCall) return 0;
2405 PPCFunctionInfo *FI = DAG.getMachineFunction().getInfo<PPCFunctionInfo>();
2406 unsigned CallerMinReservedArea = FI->getMinReservedArea();
2407 int SPDiff = (int)CallerMinReservedArea - (int)ParamSize;
2408 // Remember only if the new adjustement is bigger.
2409 if (SPDiff < FI->getTailCallSPDelta())
2410 FI->setTailCallSPDelta(SPDiff);
2415 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
2416 /// for tail call optimization. Targets which want to do tail call
2417 /// optimization should implement this function.
2419 PPCTargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
2420 CallingConv::ID CalleeCC,
2422 const SmallVectorImpl<ISD::InputArg> &Ins,
2423 SelectionDAG& DAG) const {
2424 if (!getTargetMachine().Options.GuaranteedTailCallOpt)
2427 // Variable argument functions are not supported.
2431 MachineFunction &MF = DAG.getMachineFunction();
2432 CallingConv::ID CallerCC = MF.getFunction()->getCallingConv();
2433 if (CalleeCC == CallingConv::Fast && CallerCC == CalleeCC) {
2434 // Functions containing by val parameters are not supported.
2435 for (unsigned i = 0; i != Ins.size(); i++) {
2436 ISD::ArgFlagsTy Flags = Ins[i].Flags;
2437 if (Flags.isByVal()) return false;
2440 // Non PIC/GOT tail calls are supported.
2441 if (getTargetMachine().getRelocationModel() != Reloc::PIC_)
2444 // At the moment we can only do local tail calls (in same module, hidden
2445 // or protected) if we are generating PIC.
2446 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
2447 return G->getGlobal()->hasHiddenVisibility()
2448 || G->getGlobal()->hasProtectedVisibility();
2454 /// isCallCompatibleAddress - Return the immediate to use if the specified
2455 /// 32-bit value is representable in the immediate field of a BxA instruction.
2456 static SDNode *isBLACompatibleAddress(SDValue Op, SelectionDAG &DAG) {
2457 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op);
2460 int Addr = C->getZExtValue();
2461 if ((Addr & 3) != 0 || // Low 2 bits are implicitly zero.
2462 SignExtend32<26>(Addr) != Addr)
2463 return 0; // Top 6 bits have to be sext of immediate.
2465 return DAG.getConstant((int)C->getZExtValue() >> 2,
2466 DAG.getTargetLoweringInfo().getPointerTy()).getNode();
2471 struct TailCallArgumentInfo {
2476 TailCallArgumentInfo() : FrameIdx(0) {}
2481 /// StoreTailCallArgumentsToStackSlot - Stores arguments to their stack slot.
2483 StoreTailCallArgumentsToStackSlot(SelectionDAG &DAG,
2485 const SmallVector<TailCallArgumentInfo, 8> &TailCallArgs,
2486 SmallVector<SDValue, 8> &MemOpChains,
2488 for (unsigned i = 0, e = TailCallArgs.size(); i != e; ++i) {
2489 SDValue Arg = TailCallArgs[i].Arg;
2490 SDValue FIN = TailCallArgs[i].FrameIdxOp;
2491 int FI = TailCallArgs[i].FrameIdx;
2492 // Store relative to framepointer.
2493 MemOpChains.push_back(DAG.getStore(Chain, dl, Arg, FIN,
2494 MachinePointerInfo::getFixedStack(FI),
2499 /// EmitTailCallStoreFPAndRetAddr - Move the frame pointer and return address to
2500 /// the appropriate stack slot for the tail call optimized function call.
2501 static SDValue EmitTailCallStoreFPAndRetAddr(SelectionDAG &DAG,
2502 MachineFunction &MF,
2511 // Calculate the new stack slot for the return address.
2512 int SlotSize = isPPC64 ? 8 : 4;
2513 int NewRetAddrLoc = SPDiff + PPCFrameLowering::getReturnSaveOffset(isPPC64,
2515 int NewRetAddr = MF.getFrameInfo()->CreateFixedObject(SlotSize,
2516 NewRetAddrLoc, true);
2517 EVT VT = isPPC64 ? MVT::i64 : MVT::i32;
2518 SDValue NewRetAddrFrIdx = DAG.getFrameIndex(NewRetAddr, VT);
2519 Chain = DAG.getStore(Chain, dl, OldRetAddr, NewRetAddrFrIdx,
2520 MachinePointerInfo::getFixedStack(NewRetAddr),
2523 // When using the 32/64-bit SVR4 ABI there is no need to move the FP stack
2524 // slot as the FP is never overwritten.
2527 SPDiff + PPCFrameLowering::getFramePointerSaveOffset(isPPC64, isDarwinABI);
2528 int NewFPIdx = MF.getFrameInfo()->CreateFixedObject(SlotSize, NewFPLoc,
2530 SDValue NewFramePtrIdx = DAG.getFrameIndex(NewFPIdx, VT);
2531 Chain = DAG.getStore(Chain, dl, OldFP, NewFramePtrIdx,
2532 MachinePointerInfo::getFixedStack(NewFPIdx),
2539 /// CalculateTailCallArgDest - Remember Argument for later processing. Calculate
2540 /// the position of the argument.
2542 CalculateTailCallArgDest(SelectionDAG &DAG, MachineFunction &MF, bool isPPC64,
2543 SDValue Arg, int SPDiff, unsigned ArgOffset,
2544 SmallVector<TailCallArgumentInfo, 8>& TailCallArguments) {
2545 int Offset = ArgOffset + SPDiff;
2546 uint32_t OpSize = (Arg.getValueType().getSizeInBits()+7)/8;
2547 int FI = MF.getFrameInfo()->CreateFixedObject(OpSize, Offset, true);
2548 EVT VT = isPPC64 ? MVT::i64 : MVT::i32;
2549 SDValue FIN = DAG.getFrameIndex(FI, VT);
2550 TailCallArgumentInfo Info;
2552 Info.FrameIdxOp = FIN;
2554 TailCallArguments.push_back(Info);
2557 /// EmitTCFPAndRetAddrLoad - Emit load from frame pointer and return address
2558 /// stack slot. Returns the chain as result and the loaded frame pointers in
2559 /// LROpOut/FPOpout. Used when tail calling.
2560 SDValue PPCTargetLowering::EmitTailCallLoadFPAndRetAddr(SelectionDAG & DAG,
2566 DebugLoc dl) const {
2568 // Load the LR and FP stack slot for later adjusting.
2569 EVT VT = PPCSubTarget.isPPC64() ? MVT::i64 : MVT::i32;
2570 LROpOut = getReturnAddrFrameIndex(DAG);
2571 LROpOut = DAG.getLoad(VT, dl, Chain, LROpOut, MachinePointerInfo(),
2572 false, false, false, 0);
2573 Chain = SDValue(LROpOut.getNode(), 1);
2575 // When using the 32/64-bit SVR4 ABI there is no need to load the FP stack
2576 // slot as the FP is never overwritten.
2578 FPOpOut = getFramePointerFrameIndex(DAG);
2579 FPOpOut = DAG.getLoad(VT, dl, Chain, FPOpOut, MachinePointerInfo(),
2580 false, false, false, 0);
2581 Chain = SDValue(FPOpOut.getNode(), 1);
2587 /// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
2588 /// by "Src" to address "Dst" of size "Size". Alignment information is
2589 /// specified by the specific parameter attribute. The copy will be passed as
2590 /// a byval function parameter.
2591 /// Sometimes what we are copying is the end of a larger object, the part that
2592 /// does not fit in registers.
2594 CreateCopyOfByValArgument(SDValue Src, SDValue Dst, SDValue Chain,
2595 ISD::ArgFlagsTy Flags, SelectionDAG &DAG,
2597 SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), MVT::i32);
2598 return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
2599 false, false, MachinePointerInfo(0),
2600 MachinePointerInfo(0));
2603 /// LowerMemOpCallTo - Store the argument to the stack or remember it in case of
2606 LowerMemOpCallTo(SelectionDAG &DAG, MachineFunction &MF, SDValue Chain,
2607 SDValue Arg, SDValue PtrOff, int SPDiff,
2608 unsigned ArgOffset, bool isPPC64, bool isTailCall,
2609 bool isVector, SmallVector<SDValue, 8> &MemOpChains,
2610 SmallVector<TailCallArgumentInfo, 8> &TailCallArguments,
2612 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2617 StackPtr = DAG.getRegister(PPC::X1, MVT::i64);
2619 StackPtr = DAG.getRegister(PPC::R1, MVT::i32);
2620 PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr,
2621 DAG.getConstant(ArgOffset, PtrVT));
2623 MemOpChains.push_back(DAG.getStore(Chain, dl, Arg, PtrOff,
2624 MachinePointerInfo(), false, false, 0));
2625 // Calculate and remember argument location.
2626 } else CalculateTailCallArgDest(DAG, MF, isPPC64, Arg, SPDiff, ArgOffset,
2631 void PrepareTailCall(SelectionDAG &DAG, SDValue &InFlag, SDValue &Chain,
2632 DebugLoc dl, bool isPPC64, int SPDiff, unsigned NumBytes,
2633 SDValue LROp, SDValue FPOp, bool isDarwinABI,
2634 SmallVector<TailCallArgumentInfo, 8> &TailCallArguments) {
2635 MachineFunction &MF = DAG.getMachineFunction();
2637 // Emit a sequence of copyto/copyfrom virtual registers for arguments that
2638 // might overwrite each other in case of tail call optimization.
2639 SmallVector<SDValue, 8> MemOpChains2;
2640 // Do not flag preceding copytoreg stuff together with the following stuff.
2642 StoreTailCallArgumentsToStackSlot(DAG, Chain, TailCallArguments,
2644 if (!MemOpChains2.empty())
2645 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2646 &MemOpChains2[0], MemOpChains2.size());
2648 // Store the return address to the appropriate stack slot.
2649 Chain = EmitTailCallStoreFPAndRetAddr(DAG, MF, Chain, LROp, FPOp, SPDiff,
2650 isPPC64, isDarwinABI, dl);
2652 // Emit callseq_end just before tailcall node.
2653 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
2654 DAG.getIntPtrConstant(0, true), InFlag);
2655 InFlag = Chain.getValue(1);
2659 unsigned PrepareCall(SelectionDAG &DAG, SDValue &Callee, SDValue &InFlag,
2660 SDValue &Chain, DebugLoc dl, int SPDiff, bool isTailCall,
2661 SmallVector<std::pair<unsigned, SDValue>, 8> &RegsToPass,
2662 SmallVector<SDValue, 8> &Ops, std::vector<EVT> &NodeTys,
2663 const PPCSubtarget &PPCSubTarget) {
2665 bool isPPC64 = PPCSubTarget.isPPC64();
2666 bool isSVR4ABI = PPCSubTarget.isSVR4ABI();
2668 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2669 NodeTys.push_back(MVT::Other); // Returns a chain
2670 NodeTys.push_back(MVT::Glue); // Returns a flag for retval copy to use.
2672 unsigned CallOpc = isSVR4ABI ? PPCISD::CALL_SVR4 : PPCISD::CALL_Darwin;
2674 bool needIndirectCall = true;
2675 if (SDNode *Dest = isBLACompatibleAddress(Callee, DAG)) {
2676 // If this is an absolute destination address, use the munged value.
2677 Callee = SDValue(Dest, 0);
2678 needIndirectCall = false;
2681 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
2682 // XXX Work around for http://llvm.org/bugs/show_bug.cgi?id=5201
2683 // Use indirect calls for ALL functions calls in JIT mode, since the
2684 // far-call stubs may be outside relocation limits for a BL instruction.
2685 if (!DAG.getTarget().getSubtarget<PPCSubtarget>().isJITCodeModel()) {
2686 unsigned OpFlags = 0;
2687 if (DAG.getTarget().getRelocationModel() != Reloc::Static &&
2688 (PPCSubTarget.getTargetTriple().isMacOSX() &&
2689 PPCSubTarget.getTargetTriple().isMacOSXVersionLT(10, 5)) &&
2690 (G->getGlobal()->isDeclaration() ||
2691 G->getGlobal()->isWeakForLinker())) {
2692 // PC-relative references to external symbols should go through $stub,
2693 // unless we're building with the leopard linker or later, which
2694 // automatically synthesizes these stubs.
2695 OpFlags = PPCII::MO_DARWIN_STUB;
2698 // If the callee is a GlobalAddress/ExternalSymbol node (quite common,
2699 // every direct call is) turn it into a TargetGlobalAddress /
2700 // TargetExternalSymbol node so that legalize doesn't hack it.
2701 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl,
2702 Callee.getValueType(),
2704 needIndirectCall = false;
2708 if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
2709 unsigned char OpFlags = 0;
2711 if (DAG.getTarget().getRelocationModel() != Reloc::Static &&
2712 (PPCSubTarget.getTargetTriple().isMacOSX() &&
2713 PPCSubTarget.getTargetTriple().isMacOSXVersionLT(10, 5))) {
2714 // PC-relative references to external symbols should go through $stub,
2715 // unless we're building with the leopard linker or later, which
2716 // automatically synthesizes these stubs.
2717 OpFlags = PPCII::MO_DARWIN_STUB;
2720 Callee = DAG.getTargetExternalSymbol(S->getSymbol(), Callee.getValueType(),
2722 needIndirectCall = false;
2725 if (needIndirectCall) {
2726 // Otherwise, this is an indirect call. We have to use a MTCTR/BCTRL pair
2727 // to do the call, we can't use PPCISD::CALL.
2728 SDValue MTCTROps[] = {Chain, Callee, InFlag};
2730 if (isSVR4ABI && isPPC64) {
2731 // Function pointers in the 64-bit SVR4 ABI do not point to the function
2732 // entry point, but to the function descriptor (the function entry point
2733 // address is part of the function descriptor though).
2734 // The function descriptor is a three doubleword structure with the
2735 // following fields: function entry point, TOC base address and
2736 // environment pointer.
2737 // Thus for a call through a function pointer, the following actions need
2739 // 1. Save the TOC of the caller in the TOC save area of its stack
2740 // frame (this is done in LowerCall_Darwin_Or_64SVR4()).
2741 // 2. Load the address of the function entry point from the function
2743 // 3. Load the TOC of the callee from the function descriptor into r2.
2744 // 4. Load the environment pointer from the function descriptor into
2746 // 5. Branch to the function entry point address.
2747 // 6. On return of the callee, the TOC of the caller needs to be
2748 // restored (this is done in FinishCall()).
2750 // All those operations are flagged together to ensure that no other
2751 // operations can be scheduled in between. E.g. without flagging the
2752 // operations together, a TOC access in the caller could be scheduled
2753 // between the load of the callee TOC and the branch to the callee, which
2754 // results in the TOC access going through the TOC of the callee instead
2755 // of going through the TOC of the caller, which leads to incorrect code.
2757 // Load the address of the function entry point from the function
2759 SDVTList VTs = DAG.getVTList(MVT::i64, MVT::Other, MVT::Glue);
2760 SDValue LoadFuncPtr = DAG.getNode(PPCISD::LOAD, dl, VTs, MTCTROps,
2761 InFlag.getNode() ? 3 : 2);
2762 Chain = LoadFuncPtr.getValue(1);
2763 InFlag = LoadFuncPtr.getValue(2);
2765 // Load environment pointer into r11.
2766 // Offset of the environment pointer within the function descriptor.
2767 SDValue PtrOff = DAG.getIntPtrConstant(16);
2769 SDValue AddPtr = DAG.getNode(ISD::ADD, dl, MVT::i64, Callee, PtrOff);
2770 SDValue LoadEnvPtr = DAG.getNode(PPCISD::LOAD, dl, VTs, Chain, AddPtr,
2772 Chain = LoadEnvPtr.getValue(1);
2773 InFlag = LoadEnvPtr.getValue(2);
2775 SDValue EnvVal = DAG.getCopyToReg(Chain, dl, PPC::X11, LoadEnvPtr,
2777 Chain = EnvVal.getValue(0);
2778 InFlag = EnvVal.getValue(1);
2780 // Load TOC of the callee into r2. We are using a target-specific load
2781 // with r2 hard coded, because the result of a target-independent load
2782 // would never go directly into r2, since r2 is a reserved register (which
2783 // prevents the register allocator from allocating it), resulting in an
2784 // additional register being allocated and an unnecessary move instruction
2786 VTs = DAG.getVTList(MVT::Other, MVT::Glue);
2787 SDValue LoadTOCPtr = DAG.getNode(PPCISD::LOAD_TOC, dl, VTs, Chain,
2789 Chain = LoadTOCPtr.getValue(0);
2790 InFlag = LoadTOCPtr.getValue(1);
2792 MTCTROps[0] = Chain;
2793 MTCTROps[1] = LoadFuncPtr;
2794 MTCTROps[2] = InFlag;
2797 Chain = DAG.getNode(PPCISD::MTCTR, dl, NodeTys, MTCTROps,
2798 2 + (InFlag.getNode() != 0));
2799 InFlag = Chain.getValue(1);
2802 NodeTys.push_back(MVT::Other);
2803 NodeTys.push_back(MVT::Glue);
2804 Ops.push_back(Chain);
2805 CallOpc = isSVR4ABI ? PPCISD::BCTRL_SVR4 : PPCISD::BCTRL_Darwin;
2807 // Add CTR register as callee so a bctr can be emitted later.
2809 Ops.push_back(DAG.getRegister(isPPC64 ? PPC::CTR8 : PPC::CTR, PtrVT));
2812 // If this is a direct call, pass the chain and the callee.
2813 if (Callee.getNode()) {
2814 Ops.push_back(Chain);
2815 Ops.push_back(Callee);
2817 // If this is a tail call add stack pointer delta.
2819 Ops.push_back(DAG.getConstant(SPDiff, MVT::i32));
2821 // Add argument registers to the end of the list so that they are known live
2823 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
2824 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
2825 RegsToPass[i].second.getValueType()));
2831 bool isLocalCall(const SDValue &Callee)
2833 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
2834 return !G->getGlobal()->isDeclaration() &&
2835 !G->getGlobal()->isWeakForLinker();
2840 PPCTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
2841 CallingConv::ID CallConv, bool isVarArg,
2842 const SmallVectorImpl<ISD::InputArg> &Ins,
2843 DebugLoc dl, SelectionDAG &DAG,
2844 SmallVectorImpl<SDValue> &InVals) const {
2846 SmallVector<CCValAssign, 16> RVLocs;
2847 CCState CCRetInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2848 getTargetMachine(), RVLocs, *DAG.getContext());
2849 CCRetInfo.AnalyzeCallResult(Ins, RetCC_PPC);
2851 // Copy all of the result registers out of their specified physreg.
2852 for (unsigned i = 0, e = RVLocs.size(); i != e; ++i) {
2853 CCValAssign &VA = RVLocs[i];
2854 EVT VT = VA.getValVT();
2855 assert(VA.isRegLoc() && "Can only return in registers!");
2856 Chain = DAG.getCopyFromReg(Chain, dl,
2857 VA.getLocReg(), VT, InFlag).getValue(1);
2858 InVals.push_back(Chain.getValue(0));
2859 InFlag = Chain.getValue(2);
2866 PPCTargetLowering::FinishCall(CallingConv::ID CallConv, DebugLoc dl,
2867 bool isTailCall, bool isVarArg,
2869 SmallVector<std::pair<unsigned, SDValue>, 8>
2871 SDValue InFlag, SDValue Chain,
2873 int SPDiff, unsigned NumBytes,
2874 const SmallVectorImpl<ISD::InputArg> &Ins,
2875 SmallVectorImpl<SDValue> &InVals) const {
2876 std::vector<EVT> NodeTys;
2877 SmallVector<SDValue, 8> Ops;
2878 unsigned CallOpc = PrepareCall(DAG, Callee, InFlag, Chain, dl, SPDiff,
2879 isTailCall, RegsToPass, Ops, NodeTys,
2882 // Add implicit use of CR bit 6 for 32-bit SVR4 vararg calls
2883 if (isVarArg && PPCSubTarget.isSVR4ABI() && !PPCSubTarget.isPPC64())
2884 Ops.push_back(DAG.getRegister(PPC::CR1EQ, MVT::i32));
2886 // When performing tail call optimization the callee pops its arguments off
2887 // the stack. Account for this here so these bytes can be pushed back on in
2888 // PPCRegisterInfo::eliminateCallFramePseudoInstr.
2889 int BytesCalleePops =
2890 (CallConv == CallingConv::Fast &&
2891 getTargetMachine().Options.GuaranteedTailCallOpt) ? NumBytes : 0;
2893 // Add a register mask operand representing the call-preserved registers.
2894 const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
2895 const uint32_t *Mask = TRI->getCallPreservedMask(CallConv);
2896 assert(Mask && "Missing call preserved mask for calling convention");
2897 Ops.push_back(DAG.getRegisterMask(Mask));
2899 if (InFlag.getNode())
2900 Ops.push_back(InFlag);
2904 // If this is the first return lowered for this function, add the regs
2905 // to the liveout set for the function.
2906 if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
2907 SmallVector<CCValAssign, 16> RVLocs;
2908 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2909 getTargetMachine(), RVLocs, *DAG.getContext());
2910 CCInfo.AnalyzeCallResult(Ins, RetCC_PPC);
2911 for (unsigned i = 0; i != RVLocs.size(); ++i)
2912 DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
2915 assert(((Callee.getOpcode() == ISD::Register &&
2916 cast<RegisterSDNode>(Callee)->getReg() == PPC::CTR) ||
2917 Callee.getOpcode() == ISD::TargetExternalSymbol ||
2918 Callee.getOpcode() == ISD::TargetGlobalAddress ||
2919 isa<ConstantSDNode>(Callee)) &&
2920 "Expecting an global address, external symbol, absolute value or register");
2922 return DAG.getNode(PPCISD::TC_RETURN, dl, MVT::Other, &Ops[0], Ops.size());
2925 // Add a NOP immediately after the branch instruction when using the 64-bit
2926 // SVR4 ABI. At link time, if caller and callee are in a different module and
2927 // thus have a different TOC, the call will be replaced with a call to a stub
2928 // function which saves the current TOC, loads the TOC of the callee and
2929 // branches to the callee. The NOP will be replaced with a load instruction
2930 // which restores the TOC of the caller from the TOC save slot of the current
2931 // stack frame. If caller and callee belong to the same module (and have the
2932 // same TOC), the NOP will remain unchanged.
2934 bool needsTOCRestore = false;
2935 if (!isTailCall && PPCSubTarget.isSVR4ABI()&& PPCSubTarget.isPPC64()) {
2936 if (CallOpc == PPCISD::BCTRL_SVR4) {
2937 // This is a call through a function pointer.
2938 // Restore the caller TOC from the save area into R2.
2939 // See PrepareCall() for more information about calls through function
2940 // pointers in the 64-bit SVR4 ABI.
2941 // We are using a target-specific load with r2 hard coded, because the
2942 // result of a target-independent load would never go directly into r2,
2943 // since r2 is a reserved register (which prevents the register allocator
2944 // from allocating it), resulting in an additional register being
2945 // allocated and an unnecessary move instruction being generated.
2946 needsTOCRestore = true;
2947 } else if ((CallOpc == PPCISD::CALL_SVR4) && !isLocalCall(Callee)) {
2948 // Otherwise insert NOP for non-local calls.
2949 CallOpc = PPCISD::CALL_NOP_SVR4;
2953 Chain = DAG.getNode(CallOpc, dl, NodeTys, &Ops[0], Ops.size());
2954 InFlag = Chain.getValue(1);
2956 if (needsTOCRestore) {
2957 SDVTList VTs = DAG.getVTList(MVT::Other, MVT::Glue);
2958 Chain = DAG.getNode(PPCISD::TOC_RESTORE, dl, VTs, Chain, InFlag);
2959 InFlag = Chain.getValue(1);
2962 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
2963 DAG.getIntPtrConstant(BytesCalleePops, true),
2966 InFlag = Chain.getValue(1);
2968 return LowerCallResult(Chain, InFlag, CallConv, isVarArg,
2969 Ins, dl, DAG, InVals);
2973 PPCTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
2974 SmallVectorImpl<SDValue> &InVals) const {
2975 SelectionDAG &DAG = CLI.DAG;
2976 DebugLoc &dl = CLI.DL;
2977 SmallVector<ISD::OutputArg, 32> &Outs = CLI.Outs;
2978 SmallVector<SDValue, 32> &OutVals = CLI.OutVals;
2979 SmallVector<ISD::InputArg, 32> &Ins = CLI.Ins;
2980 SDValue Chain = CLI.Chain;
2981 SDValue Callee = CLI.Callee;
2982 bool &isTailCall = CLI.IsTailCall;
2983 CallingConv::ID CallConv = CLI.CallConv;
2984 bool isVarArg = CLI.IsVarArg;
2987 isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv, isVarArg,
2990 if (PPCSubTarget.isSVR4ABI() && !PPCSubTarget.isPPC64())
2991 return LowerCall_32SVR4(Chain, Callee, CallConv, isVarArg,
2992 isTailCall, Outs, OutVals, Ins,
2995 return LowerCall_Darwin_Or_64SVR4(Chain, Callee, CallConv, isVarArg,
2996 isTailCall, Outs, OutVals, Ins,
3001 PPCTargetLowering::LowerCall_32SVR4(SDValue Chain, SDValue Callee,
3002 CallingConv::ID CallConv, bool isVarArg,
3004 const SmallVectorImpl<ISD::OutputArg> &Outs,
3005 const SmallVectorImpl<SDValue> &OutVals,
3006 const SmallVectorImpl<ISD::InputArg> &Ins,
3007 DebugLoc dl, SelectionDAG &DAG,
3008 SmallVectorImpl<SDValue> &InVals) const {
3009 // See PPCTargetLowering::LowerFormalArguments_32SVR4() for a description
3010 // of the 32-bit SVR4 ABI stack frame layout.
3012 assert((CallConv == CallingConv::C ||
3013 CallConv == CallingConv::Fast) && "Unknown calling convention!");
3015 unsigned PtrByteSize = 4;
3017 MachineFunction &MF = DAG.getMachineFunction();
3019 // Mark this function as potentially containing a function that contains a
3020 // tail call. As a consequence the frame pointer will be used for dynamicalloc
3021 // and restoring the callers stack pointer in this functions epilog. This is
3022 // done because by tail calling the called function might overwrite the value
3023 // in this function's (MF) stack pointer stack slot 0(SP).
3024 if (getTargetMachine().Options.GuaranteedTailCallOpt &&
3025 CallConv == CallingConv::Fast)
3026 MF.getInfo<PPCFunctionInfo>()->setHasFastCall();
3028 // Count how many bytes are to be pushed on the stack, including the linkage
3029 // area, parameter list area and the part of the local variable space which
3030 // contains copies of aggregates which are passed by value.
3032 // Assign locations to all of the outgoing arguments.
3033 SmallVector<CCValAssign, 16> ArgLocs;
3034 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
3035 getTargetMachine(), ArgLocs, *DAG.getContext());
3037 // Reserve space for the linkage area on the stack.
3038 CCInfo.AllocateStack(PPCFrameLowering::getLinkageSize(false, false), PtrByteSize);
3041 // Handle fixed and variable vector arguments differently.
3042 // Fixed vector arguments go into registers as long as registers are
3043 // available. Variable vector arguments always go into memory.
3044 unsigned NumArgs = Outs.size();
3046 for (unsigned i = 0; i != NumArgs; ++i) {
3047 MVT ArgVT = Outs[i].VT;
3048 ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
3051 if (Outs[i].IsFixed) {
3052 Result = CC_PPC_SVR4(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags,
3055 Result = CC_PPC_SVR4_VarArg(i, ArgVT, ArgVT, CCValAssign::Full,
3061 errs() << "Call operand #" << i << " has unhandled type "
3062 << EVT(ArgVT).getEVTString() << "\n";
3064 llvm_unreachable(0);
3068 // All arguments are treated the same.
3069 CCInfo.AnalyzeCallOperands(Outs, CC_PPC_SVR4);
3072 // Assign locations to all of the outgoing aggregate by value arguments.
3073 SmallVector<CCValAssign, 16> ByValArgLocs;
3074 CCState CCByValInfo(CallConv, isVarArg, DAG.getMachineFunction(),
3075 getTargetMachine(), ByValArgLocs, *DAG.getContext());
3077 // Reserve stack space for the allocations in CCInfo.
3078 CCByValInfo.AllocateStack(CCInfo.getNextStackOffset(), PtrByteSize);
3080 CCByValInfo.AnalyzeCallOperands(Outs, CC_PPC_SVR4_ByVal);
3082 // Size of the linkage area, parameter list area and the part of the local
3083 // space variable where copies of aggregates which are passed by value are
3085 unsigned NumBytes = CCByValInfo.getNextStackOffset();
3087 // Calculate by how many bytes the stack has to be adjusted in case of tail
3088 // call optimization.
3089 int SPDiff = CalculateTailCallSPDiff(DAG, isTailCall, NumBytes);
3091 // Adjust the stack pointer for the new arguments...
3092 // These operations are automatically eliminated by the prolog/epilog pass
3093 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
3094 SDValue CallSeqStart = Chain;
3096 // Load the return address and frame pointer so it can be moved somewhere else
3099 Chain = EmitTailCallLoadFPAndRetAddr(DAG, SPDiff, Chain, LROp, FPOp, false,
3102 // Set up a copy of the stack pointer for use loading and storing any
3103 // arguments that may not fit in the registers available for argument
3105 SDValue StackPtr = DAG.getRegister(PPC::R1, MVT::i32);
3107 SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
3108 SmallVector<TailCallArgumentInfo, 8> TailCallArguments;
3109 SmallVector<SDValue, 8> MemOpChains;
3111 bool seenFloatArg = false;
3112 // Walk the register/memloc assignments, inserting copies/loads.
3113 for (unsigned i = 0, j = 0, e = ArgLocs.size();
3116 CCValAssign &VA = ArgLocs[i];
3117 SDValue Arg = OutVals[i];
3118 ISD::ArgFlagsTy Flags = Outs[i].Flags;
3120 if (Flags.isByVal()) {
3121 // Argument is an aggregate which is passed by value, thus we need to
3122 // create a copy of it in the local variable space of the current stack
3123 // frame (which is the stack frame of the caller) and pass the address of
3124 // this copy to the callee.
3125 assert((j < ByValArgLocs.size()) && "Index out of bounds!");
3126 CCValAssign &ByValVA = ByValArgLocs[j++];
3127 assert((VA.getValNo() == ByValVA.getValNo()) && "ValNo mismatch!");
3129 // Memory reserved in the local variable space of the callers stack frame.
3130 unsigned LocMemOffset = ByValVA.getLocMemOffset();
3132 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
3133 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
3135 // Create a copy of the argument in the local area of the current
3137 SDValue MemcpyCall =
3138 CreateCopyOfByValArgument(Arg, PtrOff,
3139 CallSeqStart.getNode()->getOperand(0),
3142 // This must go outside the CALLSEQ_START..END.
3143 SDValue NewCallSeqStart = DAG.getCALLSEQ_START(MemcpyCall,
3144 CallSeqStart.getNode()->getOperand(1));
3145 DAG.ReplaceAllUsesWith(CallSeqStart.getNode(),
3146 NewCallSeqStart.getNode());
3147 Chain = CallSeqStart = NewCallSeqStart;
3149 // Pass the address of the aggregate copy on the stack either in a
3150 // physical register or in the parameter list area of the current stack
3151 // frame to the callee.
3155 if (VA.isRegLoc()) {
3156 seenFloatArg |= VA.getLocVT().isFloatingPoint();
3157 // Put argument in a physical register.
3158 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
3160 // Put argument in the parameter list area of the current stack frame.
3161 assert(VA.isMemLoc());
3162 unsigned LocMemOffset = VA.getLocMemOffset();
3165 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
3166 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
3168 MemOpChains.push_back(DAG.getStore(Chain, dl, Arg, PtrOff,
3169 MachinePointerInfo(),
3172 // Calculate and remember argument location.
3173 CalculateTailCallArgDest(DAG, MF, false, Arg, SPDiff, LocMemOffset,
3179 if (!MemOpChains.empty())
3180 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
3181 &MemOpChains[0], MemOpChains.size());
3183 // Build a sequence of copy-to-reg nodes chained together with token chain
3184 // and flag operands which copy the outgoing args into the appropriate regs.
3186 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
3187 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
3188 RegsToPass[i].second, InFlag);
3189 InFlag = Chain.getValue(1);
3192 // Set CR bit 6 to true if this is a vararg call with floating args passed in
3195 SDVTList VTs = DAG.getVTList(MVT::Other, MVT::Glue);
3196 SDValue Ops[] = { Chain, InFlag };
3198 Chain = DAG.getNode(seenFloatArg ? PPCISD::CR6SET : PPCISD::CR6UNSET,
3199 dl, VTs, Ops, InFlag.getNode() ? 2 : 1);
3201 InFlag = Chain.getValue(1);
3205 PrepareTailCall(DAG, InFlag, Chain, dl, false, SPDiff, NumBytes, LROp, FPOp,
3206 false, TailCallArguments);
3208 return FinishCall(CallConv, dl, isTailCall, isVarArg, DAG,
3209 RegsToPass, InFlag, Chain, Callee, SPDiff, NumBytes,
3214 PPCTargetLowering::LowerCall_Darwin_Or_64SVR4(SDValue Chain, SDValue Callee,
3215 CallingConv::ID CallConv, bool isVarArg,
3217 const SmallVectorImpl<ISD::OutputArg> &Outs,
3218 const SmallVectorImpl<SDValue> &OutVals,
3219 const SmallVectorImpl<ISD::InputArg> &Ins,
3220 DebugLoc dl, SelectionDAG &DAG,
3221 SmallVectorImpl<SDValue> &InVals) const {
3223 bool isSVR4ABI = PPCSubTarget.isSVR4ABI();
3225 unsigned NumOps = Outs.size();
3227 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
3228 bool isPPC64 = PtrVT == MVT::i64;
3229 unsigned PtrByteSize = isPPC64 ? 8 : 4;
3231 MachineFunction &MF = DAG.getMachineFunction();
3233 // Mark this function as potentially containing a function that contains a
3234 // tail call. As a consequence the frame pointer will be used for dynamicalloc
3235 // and restoring the callers stack pointer in this functions epilog. This is
3236 // done because by tail calling the called function might overwrite the value
3237 // in this function's (MF) stack pointer stack slot 0(SP).
3238 if (getTargetMachine().Options.GuaranteedTailCallOpt &&
3239 CallConv == CallingConv::Fast)
3240 MF.getInfo<PPCFunctionInfo>()->setHasFastCall();
3242 unsigned nAltivecParamsAtEnd = 0;
3244 // Count how many bytes are to be pushed on the stack, including the linkage
3245 // area, and parameter passing area. We start with 24/48 bytes, which is
3246 // prereserved space for [SP][CR][LR][3 x unused].
3248 CalculateParameterAndLinkageAreaSize(DAG, isPPC64, isVarArg, CallConv,
3250 nAltivecParamsAtEnd);
3252 // Calculate by how many bytes the stack has to be adjusted in case of tail
3253 // call optimization.
3254 int SPDiff = CalculateTailCallSPDiff(DAG, isTailCall, NumBytes);
3256 // To protect arguments on the stack from being clobbered in a tail call,
3257 // force all the loads to happen before doing any other lowering.
3259 Chain = DAG.getStackArgumentTokenFactor(Chain);
3261 // Adjust the stack pointer for the new arguments...
3262 // These operations are automatically eliminated by the prolog/epilog pass
3263 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
3264 SDValue CallSeqStart = Chain;
3266 // Load the return address and frame pointer so it can be move somewhere else
3269 Chain = EmitTailCallLoadFPAndRetAddr(DAG, SPDiff, Chain, LROp, FPOp, true,
3272 // Set up a copy of the stack pointer for use loading and storing any
3273 // arguments that may not fit in the registers available for argument
3277 StackPtr = DAG.getRegister(PPC::X1, MVT::i64);
3279 StackPtr = DAG.getRegister(PPC::R1, MVT::i32);
3281 // Figure out which arguments are going to go in registers, and which in
3282 // memory. Also, if this is a vararg function, floating point operations
3283 // must be stored to our stack, and loaded into integer regs as well, if
3284 // any integer regs are available for argument passing.
3285 unsigned ArgOffset = PPCFrameLowering::getLinkageSize(isPPC64, true);
3286 unsigned GPR_idx = 0, FPR_idx = 0, VR_idx = 0;
3288 static const uint16_t GPR_32[] = { // 32-bit registers.
3289 PPC::R3, PPC::R4, PPC::R5, PPC::R6,
3290 PPC::R7, PPC::R8, PPC::R9, PPC::R10,
3292 static const uint16_t GPR_64[] = { // 64-bit registers.
3293 PPC::X3, PPC::X4, PPC::X5, PPC::X6,
3294 PPC::X7, PPC::X8, PPC::X9, PPC::X10,
3296 static const uint16_t *FPR = GetFPR();
3298 static const uint16_t VR[] = {
3299 PPC::V2, PPC::V3, PPC::V4, PPC::V5, PPC::V6, PPC::V7, PPC::V8,
3300 PPC::V9, PPC::V10, PPC::V11, PPC::V12, PPC::V13
3302 const unsigned NumGPRs = array_lengthof(GPR_32);
3303 const unsigned NumFPRs = 13;
3304 const unsigned NumVRs = array_lengthof(VR);
3306 const uint16_t *GPR = isPPC64 ? GPR_64 : GPR_32;
3308 SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
3309 SmallVector<TailCallArgumentInfo, 8> TailCallArguments;
3311 SmallVector<SDValue, 8> MemOpChains;
3312 for (unsigned i = 0; i != NumOps; ++i) {
3313 SDValue Arg = OutVals[i];
3314 ISD::ArgFlagsTy Flags = Outs[i].Flags;
3316 // PtrOff will be used to store the current argument to the stack if a
3317 // register cannot be found for it.
3320 PtrOff = DAG.getConstant(ArgOffset, StackPtr.getValueType());
3322 PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr, PtrOff);
3324 // On PPC64, promote integers to 64-bit values.
3325 if (isPPC64 && Arg.getValueType() == MVT::i32) {
3326 // FIXME: Should this use ANY_EXTEND if neither sext nor zext?
3327 unsigned ExtOp = Flags.isSExt() ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND;
3328 Arg = DAG.getNode(ExtOp, dl, MVT::i64, Arg);
3331 // FIXME memcpy is used way more than necessary. Correctness first.
3332 // Note: "by value" is code for passing a structure by value, not
3334 if (Flags.isByVal()) {
3335 // Note: Size includes alignment padding, so
3336 // struct x { short a; char b; }
3337 // will have Size = 4. With #pragma pack(1), it will have Size = 3.
3338 // These are the proper values we need for right-justifying the
3339 // aggregate in a parameter register for 64-bit SVR4.
3340 unsigned Size = Flags.getByValSize();
3341 // FOR DARWIN ONLY: Very small objects are passed right-justified.
3342 // Everything else is passed left-justified.
3343 // FOR 64-BIT SVR4: All aggregates smaller than 8 bytes must
3344 // be passed right-justified.
3345 if (Size==1 || Size==2 ||
3346 (Size==4 && isSVR4ABI)) {
3347 EVT VT = (Size==1) ? MVT::i8 : ((Size==2) ? MVT::i16 : MVT::i32);
3348 if (GPR_idx != NumGPRs) {
3349 SDValue Load = DAG.getExtLoad(ISD::EXTLOAD, dl, PtrVT, Chain, Arg,
3350 MachinePointerInfo(), VT,
3352 MemOpChains.push_back(Load.getValue(1));
3353 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
3355 ArgOffset += PtrByteSize;
3357 SDValue Const = DAG.getConstant(4 - Size, PtrOff.getValueType());
3358 SDValue AddPtr = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff, Const);
3359 SDValue MemcpyCall = CreateCopyOfByValArgument(Arg, AddPtr,
3360 CallSeqStart.getNode()->getOperand(0),
3362 // This must go outside the CALLSEQ_START..END.
3363 SDValue NewCallSeqStart = DAG.getCALLSEQ_START(MemcpyCall,
3364 CallSeqStart.getNode()->getOperand(1));
3365 DAG.ReplaceAllUsesWith(CallSeqStart.getNode(),
3366 NewCallSeqStart.getNode());
3367 Chain = CallSeqStart = NewCallSeqStart;
3368 ArgOffset += PtrByteSize;
3372 // Copy entire object into memory. There are cases where gcc-generated
3373 // code assumes it is there, even if it could be put entirely into
3374 // registers. (This is not what the doc says.)
3376 // FIXME: The above statement is likely due to a misunderstanding of the
3377 // documents. At least for 64-bit SVR4, all arguments must be copied
3378 // into the parameter area BY THE CALLEE in the event that the callee
3379 // takes the address of any formal argument. That has not yet been
3380 // implemented. However, it is reasonable to use the stack area as a
3381 // staging area for the register load.
3383 // Skip this for small aggregates under 64-bit SVR4, as we will use
3384 // the same slot for a right-justified copy, below.
3385 if (Size >= 8 || !isSVR4ABI) {
3386 SDValue MemcpyCall = CreateCopyOfByValArgument(Arg, PtrOff,
3387 CallSeqStart.getNode()->getOperand(0),
3389 // This must go outside the CALLSEQ_START..END.
3390 SDValue NewCallSeqStart = DAG.getCALLSEQ_START(MemcpyCall,
3391 CallSeqStart.getNode()->getOperand(1));
3392 DAG.ReplaceAllUsesWith(CallSeqStart.getNode(),
3393 NewCallSeqStart.getNode());
3394 Chain = CallSeqStart = NewCallSeqStart;
3397 // FOR 64-BIT SVR4: When a register is available, pass the
3398 // aggregate right-justified.
3399 if (isSVR4ABI && Size < 8 && GPR_idx != NumGPRs) {
3400 // The easiest way to get this right-justified in a register
3401 // is to copy the structure into the rightmost portion of a
3402 // local variable slot, then load the whole slot into the
3404 // FIXME: The memcpy seems to produce pretty awful code for
3405 // small aggregates, particularly for packed ones.
3406 // FIXME: It would be preferable to use the slot in the
3407 // parameter save area instead of a new local variable.
3408 SDValue Const = DAG.getConstant(8 - Size, PtrOff.getValueType());
3409 SDValue AddPtr = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff, Const);
3410 SDValue MemcpyCall = CreateCopyOfByValArgument(Arg, AddPtr,
3411 CallSeqStart.getNode()->getOperand(0),
3414 // Place the memcpy outside the CALLSEQ_START..END.
3415 SDValue NewCallSeqStart = DAG.getCALLSEQ_START(MemcpyCall,
3416 CallSeqStart.getNode()->getOperand(1));
3417 DAG.ReplaceAllUsesWith(CallSeqStart.getNode(),
3418 NewCallSeqStart.getNode());
3419 Chain = CallSeqStart = NewCallSeqStart;
3421 // Load the slot into the register.
3422 SDValue Load = DAG.getLoad(PtrVT, dl, Chain, PtrOff,
3423 MachinePointerInfo(),
3424 false, false, false, 0);
3425 MemOpChains.push_back(Load.getValue(1));
3426 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
3428 // Done with this argument.
3429 ArgOffset += PtrByteSize;
3433 // For small aggregates (Darwin only) and aggregates >= PtrByteSize,
3434 // copy the pieces of the object that fit into registers from the
3435 // parameter save area.
3436 for (unsigned j=0; j<Size; j+=PtrByteSize) {
3437 SDValue Const = DAG.getConstant(j, PtrOff.getValueType());
3438 SDValue AddArg = DAG.getNode(ISD::ADD, dl, PtrVT, Arg, Const);
3439 if (GPR_idx != NumGPRs) {
3440 SDValue Load = DAG.getLoad(PtrVT, dl, Chain, AddArg,
3441 MachinePointerInfo(),
3442 false, false, false, 0);
3443 MemOpChains.push_back(Load.getValue(1));
3444 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
3445 ArgOffset += PtrByteSize;
3447 ArgOffset += ((Size - j + PtrByteSize-1)/PtrByteSize)*PtrByteSize;
3454 switch (Arg.getValueType().getSimpleVT().SimpleTy) {
3455 default: llvm_unreachable("Unexpected ValueType for argument!");
3458 if (GPR_idx != NumGPRs) {
3459 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Arg));
3461 LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
3462 isPPC64, isTailCall, false, MemOpChains,
3463 TailCallArguments, dl);
3465 ArgOffset += PtrByteSize;
3469 if (FPR_idx != NumFPRs) {
3470 RegsToPass.push_back(std::make_pair(FPR[FPR_idx++], Arg));
3473 SDValue Store = DAG.getStore(Chain, dl, Arg, PtrOff,
3474 MachinePointerInfo(), false, false, 0);
3475 MemOpChains.push_back(Store);
3477 // Float varargs are always shadowed in available integer registers
3478 if (GPR_idx != NumGPRs) {
3479 SDValue Load = DAG.getLoad(PtrVT, dl, Store, PtrOff,
3480 MachinePointerInfo(), false, false,
3482 MemOpChains.push_back(Load.getValue(1));
3483 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
3485 if (GPR_idx != NumGPRs && Arg.getValueType() == MVT::f64 && !isPPC64){
3486 SDValue ConstFour = DAG.getConstant(4, PtrOff.getValueType());
3487 PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff, ConstFour);
3488 SDValue Load = DAG.getLoad(PtrVT, dl, Store, PtrOff,
3489 MachinePointerInfo(),
3490 false, false, false, 0);
3491 MemOpChains.push_back(Load.getValue(1));
3492 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
3495 // If we have any FPRs remaining, we may also have GPRs remaining.
3496 // Args passed in FPRs consume either 1 (f32) or 2 (f64) available
3498 if (GPR_idx != NumGPRs)
3500 if (GPR_idx != NumGPRs && Arg.getValueType() == MVT::f64 &&
3501 !isPPC64) // PPC64 has 64-bit GPR's obviously :)
3505 LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
3506 isPPC64, isTailCall, false, MemOpChains,
3507 TailCallArguments, dl);
3512 ArgOffset += Arg.getValueType() == MVT::f32 ? 4 : 8;
3519 // These go aligned on the stack, or in the corresponding R registers
3520 // when within range. The Darwin PPC ABI doc claims they also go in
3521 // V registers; in fact gcc does this only for arguments that are
3522 // prototyped, not for those that match the ... We do it for all
3523 // arguments, seems to work.
3524 while (ArgOffset % 16 !=0) {
3525 ArgOffset += PtrByteSize;
3526 if (GPR_idx != NumGPRs)
3529 // We could elide this store in the case where the object fits
3530 // entirely in R registers. Maybe later.
3531 PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr,
3532 DAG.getConstant(ArgOffset, PtrVT));
3533 SDValue Store = DAG.getStore(Chain, dl, Arg, PtrOff,
3534 MachinePointerInfo(), false, false, 0);
3535 MemOpChains.push_back(Store);
3536 if (VR_idx != NumVRs) {
3537 SDValue Load = DAG.getLoad(MVT::v4f32, dl, Store, PtrOff,
3538 MachinePointerInfo(),
3539 false, false, false, 0);
3540 MemOpChains.push_back(Load.getValue(1));
3541 RegsToPass.push_back(std::make_pair(VR[VR_idx++], Load));
3544 for (unsigned i=0; i<16; i+=PtrByteSize) {
3545 if (GPR_idx == NumGPRs)
3547 SDValue Ix = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff,
3548 DAG.getConstant(i, PtrVT));
3549 SDValue Load = DAG.getLoad(PtrVT, dl, Store, Ix, MachinePointerInfo(),
3550 false, false, false, 0);
3551 MemOpChains.push_back(Load.getValue(1));
3552 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
3557 // Non-varargs Altivec params generally go in registers, but have
3558 // stack space allocated at the end.
3559 if (VR_idx != NumVRs) {
3560 // Doesn't have GPR space allocated.
3561 RegsToPass.push_back(std::make_pair(VR[VR_idx++], Arg));
3562 } else if (nAltivecParamsAtEnd==0) {
3563 // We are emitting Altivec params in order.
3564 LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
3565 isPPC64, isTailCall, true, MemOpChains,
3566 TailCallArguments, dl);
3572 // If all Altivec parameters fit in registers, as they usually do,
3573 // they get stack space following the non-Altivec parameters. We
3574 // don't track this here because nobody below needs it.
3575 // If there are more Altivec parameters than fit in registers emit
3577 if (!isVarArg && nAltivecParamsAtEnd > NumVRs) {
3579 // Offset is aligned; skip 1st 12 params which go in V registers.
3580 ArgOffset = ((ArgOffset+15)/16)*16;
3582 for (unsigned i = 0; i != NumOps; ++i) {
3583 SDValue Arg = OutVals[i];
3584 EVT ArgType = Outs[i].VT;
3585 if (ArgType==MVT::v4f32 || ArgType==MVT::v4i32 ||
3586 ArgType==MVT::v8i16 || ArgType==MVT::v16i8) {
3589 // We are emitting Altivec params in order.
3590 LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
3591 isPPC64, isTailCall, true, MemOpChains,
3592 TailCallArguments, dl);
3599 if (!MemOpChains.empty())
3600 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
3601 &MemOpChains[0], MemOpChains.size());
3603 // Check if this is an indirect call (MTCTR/BCTRL).
3604 // See PrepareCall() for more information about calls through function
3605 // pointers in the 64-bit SVR4 ABI.
3606 if (!isTailCall && isPPC64 && PPCSubTarget.isSVR4ABI() &&
3607 !dyn_cast<GlobalAddressSDNode>(Callee) &&
3608 !dyn_cast<ExternalSymbolSDNode>(Callee) &&
3609 !isBLACompatibleAddress(Callee, DAG)) {
3610 // Load r2 into a virtual register and store it to the TOC save area.
3611 SDValue Val = DAG.getCopyFromReg(Chain, dl, PPC::X2, MVT::i64);
3612 // TOC save area offset.
3613 SDValue PtrOff = DAG.getIntPtrConstant(40);
3614 SDValue AddPtr = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr, PtrOff);
3615 Chain = DAG.getStore(Val.getValue(1), dl, Val, AddPtr, MachinePointerInfo(),
3619 // On Darwin, R12 must contain the address of an indirect callee. This does
3620 // not mean the MTCTR instruction must use R12; it's easier to model this as
3621 // an extra parameter, so do that.
3623 !dyn_cast<GlobalAddressSDNode>(Callee) &&
3624 !dyn_cast<ExternalSymbolSDNode>(Callee) &&
3625 !isBLACompatibleAddress(Callee, DAG))
3626 RegsToPass.push_back(std::make_pair((unsigned)(isPPC64 ? PPC::X12 :
3627 PPC::R12), Callee));
3629 // Build a sequence of copy-to-reg nodes chained together with token chain
3630 // and flag operands which copy the outgoing args into the appropriate regs.
3632 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
3633 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
3634 RegsToPass[i].second, InFlag);
3635 InFlag = Chain.getValue(1);
3639 PrepareTailCall(DAG, InFlag, Chain, dl, isPPC64, SPDiff, NumBytes, LROp,
3640 FPOp, true, TailCallArguments);
3642 return FinishCall(CallConv, dl, isTailCall, isVarArg, DAG,
3643 RegsToPass, InFlag, Chain, Callee, SPDiff, NumBytes,
3648 PPCTargetLowering::CanLowerReturn(CallingConv::ID CallConv,
3649 MachineFunction &MF, bool isVarArg,
3650 const SmallVectorImpl<ISD::OutputArg> &Outs,
3651 LLVMContext &Context) const {
3652 SmallVector<CCValAssign, 16> RVLocs;
3653 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
3655 return CCInfo.CheckReturn(Outs, RetCC_PPC);
3659 PPCTargetLowering::LowerReturn(SDValue Chain,
3660 CallingConv::ID CallConv, bool isVarArg,
3661 const SmallVectorImpl<ISD::OutputArg> &Outs,
3662 const SmallVectorImpl<SDValue> &OutVals,
3663 DebugLoc dl, SelectionDAG &DAG) const {
3665 SmallVector<CCValAssign, 16> RVLocs;
3666 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
3667 getTargetMachine(), RVLocs, *DAG.getContext());
3668 CCInfo.AnalyzeReturn(Outs, RetCC_PPC);
3670 // If this is the first return lowered for this function, add the regs to the
3671 // liveout set for the function.
3672 if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
3673 for (unsigned i = 0; i != RVLocs.size(); ++i)
3674 DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
3679 // Copy the result values into the output registers.
3680 for (unsigned i = 0; i != RVLocs.size(); ++i) {
3681 CCValAssign &VA = RVLocs[i];
3682 assert(VA.isRegLoc() && "Can only return in registers!");
3683 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
3685 Flag = Chain.getValue(1);
3689 return DAG.getNode(PPCISD::RET_FLAG, dl, MVT::Other, Chain, Flag);
3691 return DAG.getNode(PPCISD::RET_FLAG, dl, MVT::Other, Chain);
3694 SDValue PPCTargetLowering::LowerSTACKRESTORE(SDValue Op, SelectionDAG &DAG,
3695 const PPCSubtarget &Subtarget) const {
3696 // When we pop the dynamic allocation we need to restore the SP link.
3697 DebugLoc dl = Op.getDebugLoc();
3699 // Get the corect type for pointers.
3700 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
3702 // Construct the stack pointer operand.
3703 bool isPPC64 = Subtarget.isPPC64();
3704 unsigned SP = isPPC64 ? PPC::X1 : PPC::R1;
3705 SDValue StackPtr = DAG.getRegister(SP, PtrVT);
3707 // Get the operands for the STACKRESTORE.
3708 SDValue Chain = Op.getOperand(0);
3709 SDValue SaveSP = Op.getOperand(1);
3711 // Load the old link SP.
3712 SDValue LoadLinkSP = DAG.getLoad(PtrVT, dl, Chain, StackPtr,
3713 MachinePointerInfo(),
3714 false, false, false, 0);
3716 // Restore the stack pointer.
3717 Chain = DAG.getCopyToReg(LoadLinkSP.getValue(1), dl, SP, SaveSP);
3719 // Store the old link SP.
3720 return DAG.getStore(Chain, dl, LoadLinkSP, StackPtr, MachinePointerInfo(),
3727 PPCTargetLowering::getReturnAddrFrameIndex(SelectionDAG & DAG) const {
3728 MachineFunction &MF = DAG.getMachineFunction();
3729 bool isPPC64 = PPCSubTarget.isPPC64();
3730 bool isDarwinABI = PPCSubTarget.isDarwinABI();
3731 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
3733 // Get current frame pointer save index. The users of this index will be
3734 // primarily DYNALLOC instructions.
3735 PPCFunctionInfo *FI = MF.getInfo<PPCFunctionInfo>();
3736 int RASI = FI->getReturnAddrSaveIndex();
3738 // If the frame pointer save index hasn't been defined yet.
3740 // Find out what the fix offset of the frame pointer save area.
3741 int LROffset = PPCFrameLowering::getReturnSaveOffset(isPPC64, isDarwinABI);
3742 // Allocate the frame index for frame pointer save area.
3743 RASI = MF.getFrameInfo()->CreateFixedObject(isPPC64? 8 : 4, LROffset, true);
3745 FI->setReturnAddrSaveIndex(RASI);
3747 return DAG.getFrameIndex(RASI, PtrVT);
3751 PPCTargetLowering::getFramePointerFrameIndex(SelectionDAG & DAG) const {
3752 MachineFunction &MF = DAG.getMachineFunction();
3753 bool isPPC64 = PPCSubTarget.isPPC64();
3754 bool isDarwinABI = PPCSubTarget.isDarwinABI();
3755 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
3757 // Get current frame pointer save index. The users of this index will be
3758 // primarily DYNALLOC instructions.
3759 PPCFunctionInfo *FI = MF.getInfo<PPCFunctionInfo>();
3760 int FPSI = FI->getFramePointerSaveIndex();
3762 // If the frame pointer save index hasn't been defined yet.
3764 // Find out what the fix offset of the frame pointer save area.
3765 int FPOffset = PPCFrameLowering::getFramePointerSaveOffset(isPPC64,
3768 // Allocate the frame index for frame pointer save area.
3769 FPSI = MF.getFrameInfo()->CreateFixedObject(isPPC64? 8 : 4, FPOffset, true);
3771 FI->setFramePointerSaveIndex(FPSI);
3773 return DAG.getFrameIndex(FPSI, PtrVT);
3776 SDValue PPCTargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
3778 const PPCSubtarget &Subtarget) const {
3780 SDValue Chain = Op.getOperand(0);
3781 SDValue Size = Op.getOperand(1);
3782 DebugLoc dl = Op.getDebugLoc();
3784 // Get the corect type for pointers.
3785 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
3787 SDValue NegSize = DAG.getNode(ISD::SUB, dl, PtrVT,
3788 DAG.getConstant(0, PtrVT), Size);
3789 // Construct a node for the frame pointer save index.
3790 SDValue FPSIdx = getFramePointerFrameIndex(DAG);
3791 // Build a DYNALLOC node.
3792 SDValue Ops[3] = { Chain, NegSize, FPSIdx };
3793 SDVTList VTs = DAG.getVTList(PtrVT, MVT::Other);
3794 return DAG.getNode(PPCISD::DYNALLOC, dl, VTs, Ops, 3);
3797 /// LowerSELECT_CC - Lower floating point select_cc's into fsel instruction when
3799 SDValue PPCTargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const {
3800 // Not FP? Not a fsel.
3801 if (!Op.getOperand(0).getValueType().isFloatingPoint() ||
3802 !Op.getOperand(2).getValueType().isFloatingPoint())
3805 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
3807 // Cannot handle SETEQ/SETNE.
3808 if (CC == ISD::SETEQ || CC == ISD::SETNE) return Op;
3810 EVT ResVT = Op.getValueType();
3811 EVT CmpVT = Op.getOperand(0).getValueType();
3812 SDValue LHS = Op.getOperand(0), RHS = Op.getOperand(1);
3813 SDValue TV = Op.getOperand(2), FV = Op.getOperand(3);
3814 DebugLoc dl = Op.getDebugLoc();
3816 // If the RHS of the comparison is a 0.0, we don't need to do the
3817 // subtraction at all.
3818 if (isFloatingPointZero(RHS))
3820 default: break; // SETUO etc aren't handled by fsel.
3823 std::swap(TV, FV); // fsel is natively setge, swap operands for setlt
3826 if (LHS.getValueType() == MVT::f32) // Comparison is always 64-bits
3827 LHS = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, LHS);
3828 return DAG.getNode(PPCISD::FSEL, dl, ResVT, LHS, TV, FV);
3831 std::swap(TV, FV); // fsel is natively setge, swap operands for setlt
3834 if (LHS.getValueType() == MVT::f32) // Comparison is always 64-bits
3835 LHS = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, LHS);
3836 return DAG.getNode(PPCISD::FSEL, dl, ResVT,
3837 DAG.getNode(ISD::FNEG, dl, MVT::f64, LHS), TV, FV);
3842 default: break; // SETUO etc aren't handled by fsel.
3845 Cmp = DAG.getNode(ISD::FSUB, dl, CmpVT, LHS, RHS);
3846 if (Cmp.getValueType() == MVT::f32) // Comparison is always 64-bits
3847 Cmp = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Cmp);
3848 return DAG.getNode(PPCISD::FSEL, dl, ResVT, Cmp, FV, TV);
3851 Cmp = DAG.getNode(ISD::FSUB, dl, CmpVT, LHS, RHS);
3852 if (Cmp.getValueType() == MVT::f32) // Comparison is always 64-bits
3853 Cmp = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Cmp);
3854 return DAG.getNode(PPCISD::FSEL, dl, ResVT, Cmp, TV, FV);
3857 Cmp = DAG.getNode(ISD::FSUB, dl, CmpVT, RHS, LHS);
3858 if (Cmp.getValueType() == MVT::f32) // Comparison is always 64-bits
3859 Cmp = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Cmp);
3860 return DAG.getNode(PPCISD::FSEL, dl, ResVT, Cmp, FV, TV);
3863 Cmp = DAG.getNode(ISD::FSUB, dl, CmpVT, RHS, LHS);
3864 if (Cmp.getValueType() == MVT::f32) // Comparison is always 64-bits
3865 Cmp = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Cmp);
3866 return DAG.getNode(PPCISD::FSEL, dl, ResVT, Cmp, TV, FV);
3871 // FIXME: Split this code up when LegalizeDAGTypes lands.
3872 SDValue PPCTargetLowering::LowerFP_TO_INT(SDValue Op, SelectionDAG &DAG,
3873 DebugLoc dl) const {
3874 assert(Op.getOperand(0).getValueType().isFloatingPoint());
3875 SDValue Src = Op.getOperand(0);
3876 if (Src.getValueType() == MVT::f32)
3877 Src = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Src);
3880 switch (Op.getValueType().getSimpleVT().SimpleTy) {
3881 default: llvm_unreachable("Unhandled FP_TO_INT type in custom expander!");
3883 Tmp = DAG.getNode(Op.getOpcode()==ISD::FP_TO_SINT ? PPCISD::FCTIWZ :
3888 Tmp = DAG.getNode(PPCISD::FCTIDZ, dl, MVT::f64, Src);
3892 // Convert the FP value to an int value through memory.
3893 SDValue FIPtr = DAG.CreateStackTemporary(MVT::f64);
3895 // Emit a store to the stack slot.
3896 SDValue Chain = DAG.getStore(DAG.getEntryNode(), dl, Tmp, FIPtr,
3897 MachinePointerInfo(), false, false, 0);
3899 // Result is a load from the stack slot. If loading 4 bytes, make sure to
3901 if (Op.getValueType() == MVT::i32)
3902 FIPtr = DAG.getNode(ISD::ADD, dl, FIPtr.getValueType(), FIPtr,
3903 DAG.getConstant(4, FIPtr.getValueType()));
3904 return DAG.getLoad(Op.getValueType(), dl, Chain, FIPtr, MachinePointerInfo(),
3905 false, false, false, 0);
3908 SDValue PPCTargetLowering::LowerSINT_TO_FP(SDValue Op,
3909 SelectionDAG &DAG) const {
3910 DebugLoc dl = Op.getDebugLoc();
3911 // Don't handle ppc_fp128 here; let it be lowered to a libcall.
3912 if (Op.getValueType() != MVT::f32 && Op.getValueType() != MVT::f64)
3915 if (Op.getOperand(0).getValueType() == MVT::i64) {
3916 SDValue Bits = DAG.getNode(ISD::BITCAST, dl, MVT::f64, Op.getOperand(0));
3917 SDValue FP = DAG.getNode(PPCISD::FCFID, dl, MVT::f64, Bits);
3918 if (Op.getValueType() == MVT::f32)
3919 FP = DAG.getNode(ISD::FP_ROUND, dl,
3920 MVT::f32, FP, DAG.getIntPtrConstant(0));
3924 assert(Op.getOperand(0).getValueType() == MVT::i32 &&
3925 "Unhandled SINT_TO_FP type in custom expander!");
3926 // Since we only generate this in 64-bit mode, we can take advantage of
3927 // 64-bit registers. In particular, sign extend the input value into the
3928 // 64-bit register with extsw, store the WHOLE 64-bit value into the stack
3929 // then lfd it and fcfid it.
3930 MachineFunction &MF = DAG.getMachineFunction();
3931 MachineFrameInfo *FrameInfo = MF.getFrameInfo();
3932 int FrameIdx = FrameInfo->CreateStackObject(8, 8, false);
3933 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
3934 SDValue FIdx = DAG.getFrameIndex(FrameIdx, PtrVT);
3936 SDValue Ext64 = DAG.getNode(PPCISD::EXTSW_32, dl, MVT::i32,
3939 // STD the extended value into the stack slot.
3940 MachineMemOperand *MMO =
3941 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(FrameIdx),
3942 MachineMemOperand::MOStore, 8, 8);
3943 SDValue Ops[] = { DAG.getEntryNode(), Ext64, FIdx };
3945 DAG.getMemIntrinsicNode(PPCISD::STD_32, dl, DAG.getVTList(MVT::Other),
3946 Ops, 4, MVT::i64, MMO);
3947 // Load the value as a double.
3948 SDValue Ld = DAG.getLoad(MVT::f64, dl, Store, FIdx, MachinePointerInfo(),
3949 false, false, false, 0);
3951 // FCFID it and return it.
3952 SDValue FP = DAG.getNode(PPCISD::FCFID, dl, MVT::f64, Ld);
3953 if (Op.getValueType() == MVT::f32)
3954 FP = DAG.getNode(ISD::FP_ROUND, dl, MVT::f32, FP, DAG.getIntPtrConstant(0));
3958 SDValue PPCTargetLowering::LowerFLT_ROUNDS_(SDValue Op,
3959 SelectionDAG &DAG) const {
3960 DebugLoc dl = Op.getDebugLoc();
3962 The rounding mode is in bits 30:31 of FPSR, and has the following
3969 FLT_ROUNDS, on the other hand, expects the following:
3976 To perform the conversion, we do:
3977 ((FPSCR & 0x3) ^ ((~FPSCR & 0x3) >> 1))
3980 MachineFunction &MF = DAG.getMachineFunction();
3981 EVT VT = Op.getValueType();
3982 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
3983 std::vector<EVT> NodeTys;
3984 SDValue MFFSreg, InFlag;
3986 // Save FP Control Word to register
3987 NodeTys.push_back(MVT::f64); // return register
3988 NodeTys.push_back(MVT::Glue); // unused in this context
3989 SDValue Chain = DAG.getNode(PPCISD::MFFS, dl, NodeTys, &InFlag, 0);
3991 // Save FP register to stack slot
3992 int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8, false);
3993 SDValue StackSlot = DAG.getFrameIndex(SSFI, PtrVT);
3994 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Chain,
3995 StackSlot, MachinePointerInfo(), false, false,0);
3997 // Load FP Control Word from low 32 bits of stack slot.
3998 SDValue Four = DAG.getConstant(4, PtrVT);
3999 SDValue Addr = DAG.getNode(ISD::ADD, dl, PtrVT, StackSlot, Four);
4000 SDValue CWD = DAG.getLoad(MVT::i32, dl, Store, Addr, MachinePointerInfo(),
4001 false, false, false, 0);
4003 // Transform as necessary
4005 DAG.getNode(ISD::AND, dl, MVT::i32,
4006 CWD, DAG.getConstant(3, MVT::i32));
4008 DAG.getNode(ISD::SRL, dl, MVT::i32,
4009 DAG.getNode(ISD::AND, dl, MVT::i32,
4010 DAG.getNode(ISD::XOR, dl, MVT::i32,
4011 CWD, DAG.getConstant(3, MVT::i32)),
4012 DAG.getConstant(3, MVT::i32)),
4013 DAG.getConstant(1, MVT::i32));
4016 DAG.getNode(ISD::XOR, dl, MVT::i32, CWD1, CWD2);
4018 return DAG.getNode((VT.getSizeInBits() < 16 ?
4019 ISD::TRUNCATE : ISD::ZERO_EXTEND), dl, VT, RetVal);
4022 SDValue PPCTargetLowering::LowerSHL_PARTS(SDValue Op, SelectionDAG &DAG) const {
4023 EVT VT = Op.getValueType();
4024 unsigned BitWidth = VT.getSizeInBits();
4025 DebugLoc dl = Op.getDebugLoc();
4026 assert(Op.getNumOperands() == 3 &&
4027 VT == Op.getOperand(1).getValueType() &&
4030 // Expand into a bunch of logical ops. Note that these ops
4031 // depend on the PPC behavior for oversized shift amounts.
4032 SDValue Lo = Op.getOperand(0);
4033 SDValue Hi = Op.getOperand(1);
4034 SDValue Amt = Op.getOperand(2);
4035 EVT AmtVT = Amt.getValueType();
4037 SDValue Tmp1 = DAG.getNode(ISD::SUB, dl, AmtVT,
4038 DAG.getConstant(BitWidth, AmtVT), Amt);
4039 SDValue Tmp2 = DAG.getNode(PPCISD::SHL, dl, VT, Hi, Amt);
4040 SDValue Tmp3 = DAG.getNode(PPCISD::SRL, dl, VT, Lo, Tmp1);
4041 SDValue Tmp4 = DAG.getNode(ISD::OR , dl, VT, Tmp2, Tmp3);
4042 SDValue Tmp5 = DAG.getNode(ISD::ADD, dl, AmtVT, Amt,
4043 DAG.getConstant(-BitWidth, AmtVT));
4044 SDValue Tmp6 = DAG.getNode(PPCISD::SHL, dl, VT, Lo, Tmp5);
4045 SDValue OutHi = DAG.getNode(ISD::OR, dl, VT, Tmp4, Tmp6);
4046 SDValue OutLo = DAG.getNode(PPCISD::SHL, dl, VT, Lo, Amt);
4047 SDValue OutOps[] = { OutLo, OutHi };
4048 return DAG.getMergeValues(OutOps, 2, dl);
4051 SDValue PPCTargetLowering::LowerSRL_PARTS(SDValue Op, SelectionDAG &DAG) const {
4052 EVT VT = Op.getValueType();
4053 DebugLoc dl = Op.getDebugLoc();
4054 unsigned BitWidth = VT.getSizeInBits();
4055 assert(Op.getNumOperands() == 3 &&
4056 VT == Op.getOperand(1).getValueType() &&
4059 // Expand into a bunch of logical ops. Note that these ops
4060 // depend on the PPC behavior for oversized shift amounts.
4061 SDValue Lo = Op.getOperand(0);
4062 SDValue Hi = Op.getOperand(1);
4063 SDValue Amt = Op.getOperand(2);
4064 EVT AmtVT = Amt.getValueType();
4066 SDValue Tmp1 = DAG.getNode(ISD::SUB, dl, AmtVT,
4067 DAG.getConstant(BitWidth, AmtVT), Amt);
4068 SDValue Tmp2 = DAG.getNode(PPCISD::SRL, dl, VT, Lo, Amt);
4069 SDValue Tmp3 = DAG.getNode(PPCISD::SHL, dl, VT, Hi, Tmp1);
4070 SDValue Tmp4 = DAG.getNode(ISD::OR, dl, VT, Tmp2, Tmp3);
4071 SDValue Tmp5 = DAG.getNode(ISD::ADD, dl, AmtVT, Amt,
4072 DAG.getConstant(-BitWidth, AmtVT));
4073 SDValue Tmp6 = DAG.getNode(PPCISD::SRL, dl, VT, Hi, Tmp5);
4074 SDValue OutLo = DAG.getNode(ISD::OR, dl, VT, Tmp4, Tmp6);
4075 SDValue OutHi = DAG.getNode(PPCISD::SRL, dl, VT, Hi, Amt);
4076 SDValue OutOps[] = { OutLo, OutHi };
4077 return DAG.getMergeValues(OutOps, 2, dl);
4080 SDValue PPCTargetLowering::LowerSRA_PARTS(SDValue Op, SelectionDAG &DAG) const {
4081 DebugLoc dl = Op.getDebugLoc();
4082 EVT VT = Op.getValueType();
4083 unsigned BitWidth = VT.getSizeInBits();
4084 assert(Op.getNumOperands() == 3 &&
4085 VT == Op.getOperand(1).getValueType() &&
4088 // Expand into a bunch of logical ops, followed by a select_cc.
4089 SDValue Lo = Op.getOperand(0);
4090 SDValue Hi = Op.getOperand(1);
4091 SDValue Amt = Op.getOperand(2);
4092 EVT AmtVT = Amt.getValueType();
4094 SDValue Tmp1 = DAG.getNode(ISD::SUB, dl, AmtVT,
4095 DAG.getConstant(BitWidth, AmtVT), Amt);
4096 SDValue Tmp2 = DAG.getNode(PPCISD::SRL, dl, VT, Lo, Amt);
4097 SDValue Tmp3 = DAG.getNode(PPCISD::SHL, dl, VT, Hi, Tmp1);
4098 SDValue Tmp4 = DAG.getNode(ISD::OR, dl, VT, Tmp2, Tmp3);
4099 SDValue Tmp5 = DAG.getNode(ISD::ADD, dl, AmtVT, Amt,
4100 DAG.getConstant(-BitWidth, AmtVT));
4101 SDValue Tmp6 = DAG.getNode(PPCISD::SRA, dl, VT, Hi, Tmp5);
4102 SDValue OutHi = DAG.getNode(PPCISD::SRA, dl, VT, Hi, Amt);
4103 SDValue OutLo = DAG.getSelectCC(dl, Tmp5, DAG.getConstant(0, AmtVT),
4104 Tmp4, Tmp6, ISD::SETLE);
4105 SDValue OutOps[] = { OutLo, OutHi };
4106 return DAG.getMergeValues(OutOps, 2, dl);
4109 //===----------------------------------------------------------------------===//
4110 // Vector related lowering.
4113 /// BuildSplatI - Build a canonical splati of Val with an element size of
4114 /// SplatSize. Cast the result to VT.
4115 static SDValue BuildSplatI(int Val, unsigned SplatSize, EVT VT,
4116 SelectionDAG &DAG, DebugLoc dl) {
4117 assert(Val >= -16 && Val <= 15 && "vsplti is out of range!");
4119 static const EVT VTys[] = { // canonical VT to use for each size.
4120 MVT::v16i8, MVT::v8i16, MVT::Other, MVT::v4i32
4123 EVT ReqVT = VT != MVT::Other ? VT : VTys[SplatSize-1];
4125 // Force vspltis[hw] -1 to vspltisb -1 to canonicalize.
4129 EVT CanonicalVT = VTys[SplatSize-1];
4131 // Build a canonical splat for this value.
4132 SDValue Elt = DAG.getConstant(Val, MVT::i32);
4133 SmallVector<SDValue, 8> Ops;
4134 Ops.assign(CanonicalVT.getVectorNumElements(), Elt);
4135 SDValue Res = DAG.getNode(ISD::BUILD_VECTOR, dl, CanonicalVT,
4136 &Ops[0], Ops.size());
4137 return DAG.getNode(ISD::BITCAST, dl, ReqVT, Res);
4140 /// BuildIntrinsicOp - Return a binary operator intrinsic node with the
4141 /// specified intrinsic ID.
4142 static SDValue BuildIntrinsicOp(unsigned IID, SDValue LHS, SDValue RHS,
4143 SelectionDAG &DAG, DebugLoc dl,
4144 EVT DestVT = MVT::Other) {
4145 if (DestVT == MVT::Other) DestVT = LHS.getValueType();
4146 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, DestVT,
4147 DAG.getConstant(IID, MVT::i32), LHS, RHS);
4150 /// BuildIntrinsicOp - Return a ternary operator intrinsic node with the
4151 /// specified intrinsic ID.
4152 static SDValue BuildIntrinsicOp(unsigned IID, SDValue Op0, SDValue Op1,
4153 SDValue Op2, SelectionDAG &DAG,
4154 DebugLoc dl, EVT DestVT = MVT::Other) {
4155 if (DestVT == MVT::Other) DestVT = Op0.getValueType();
4156 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, DestVT,
4157 DAG.getConstant(IID, MVT::i32), Op0, Op1, Op2);
4161 /// BuildVSLDOI - Return a VECTOR_SHUFFLE that is a vsldoi of the specified
4162 /// amount. The result has the specified value type.
4163 static SDValue BuildVSLDOI(SDValue LHS, SDValue RHS, unsigned Amt,
4164 EVT VT, SelectionDAG &DAG, DebugLoc dl) {
4165 // Force LHS/RHS to be the right type.
4166 LHS = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, LHS);
4167 RHS = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, RHS);
4170 for (unsigned i = 0; i != 16; ++i)
4172 SDValue T = DAG.getVectorShuffle(MVT::v16i8, dl, LHS, RHS, Ops);
4173 return DAG.getNode(ISD::BITCAST, dl, VT, T);
4176 // If this is a case we can't handle, return null and let the default
4177 // expansion code take care of it. If we CAN select this case, and if it
4178 // selects to a single instruction, return Op. Otherwise, if we can codegen
4179 // this case more efficiently than a constant pool load, lower it to the
4180 // sequence of ops that should be used.
4181 SDValue PPCTargetLowering::LowerBUILD_VECTOR(SDValue Op,
4182 SelectionDAG &DAG) const {
4183 DebugLoc dl = Op.getDebugLoc();
4184 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(Op.getNode());
4185 assert(BVN != 0 && "Expected a BuildVectorSDNode in LowerBUILD_VECTOR");
4187 // Check if this is a splat of a constant value.
4188 APInt APSplatBits, APSplatUndef;
4189 unsigned SplatBitSize;
4191 if (! BVN->isConstantSplat(APSplatBits, APSplatUndef, SplatBitSize,
4192 HasAnyUndefs, 0, true) || SplatBitSize > 32)
4195 unsigned SplatBits = APSplatBits.getZExtValue();
4196 unsigned SplatUndef = APSplatUndef.getZExtValue();
4197 unsigned SplatSize = SplatBitSize / 8;
4199 // First, handle single instruction cases.
4202 if (SplatBits == 0) {
4203 // Canonicalize all zero vectors to be v4i32.
4204 if (Op.getValueType() != MVT::v4i32 || HasAnyUndefs) {
4205 SDValue Z = DAG.getConstant(0, MVT::i32);
4206 Z = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Z, Z, Z, Z);
4207 Op = DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Z);
4212 // If the sign extended value is in the range [-16,15], use VSPLTI[bhw].
4213 int32_t SextVal= (int32_t(SplatBits << (32-SplatBitSize)) >>
4215 if (SextVal >= -16 && SextVal <= 15)
4216 return BuildSplatI(SextVal, SplatSize, Op.getValueType(), DAG, dl);
4219 // Two instruction sequences.
4221 // If this value is in the range [-32,30] and is even, use:
4222 // tmp = VSPLTI[bhw], result = add tmp, tmp
4223 if (SextVal >= -32 && SextVal <= 30 && (SextVal & 1) == 0) {
4224 SDValue Res = BuildSplatI(SextVal >> 1, SplatSize, MVT::Other, DAG, dl);
4225 Res = DAG.getNode(ISD::ADD, dl, Res.getValueType(), Res, Res);
4226 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Res);
4229 // If this is 0x8000_0000 x 4, turn into vspltisw + vslw. If it is
4230 // 0x7FFF_FFFF x 4, turn it into not(0x8000_0000). This is important
4232 if (SplatSize == 4 && SplatBits == (0x7FFFFFFF&~SplatUndef)) {
4233 // Make -1 and vspltisw -1:
4234 SDValue OnesV = BuildSplatI(-1, 4, MVT::v4i32, DAG, dl);
4236 // Make the VSLW intrinsic, computing 0x8000_0000.
4237 SDValue Res = BuildIntrinsicOp(Intrinsic::ppc_altivec_vslw, OnesV,
4240 // xor by OnesV to invert it.
4241 Res = DAG.getNode(ISD::XOR, dl, MVT::v4i32, Res, OnesV);
4242 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Res);
4245 // Check to see if this is a wide variety of vsplti*, binop self cases.
4246 static const signed char SplatCsts[] = {
4247 -1, 1, -2, 2, -3, 3, -4, 4, -5, 5, -6, 6, -7, 7,
4248 -8, 8, -9, 9, -10, 10, -11, 11, -12, 12, -13, 13, 14, -14, 15, -15, -16
4251 for (unsigned idx = 0; idx < array_lengthof(SplatCsts); ++idx) {
4252 // Indirect through the SplatCsts array so that we favor 'vsplti -1' for
4253 // cases which are ambiguous (e.g. formation of 0x8000_0000). 'vsplti -1'
4254 int i = SplatCsts[idx];
4256 // Figure out what shift amount will be used by altivec if shifted by i in
4258 unsigned TypeShiftAmt = i & (SplatBitSize-1);
4260 // vsplti + shl self.
4261 if (SextVal == (int)((unsigned)i << TypeShiftAmt)) {
4262 SDValue Res = BuildSplatI(i, SplatSize, MVT::Other, DAG, dl);
4263 static const unsigned IIDs[] = { // Intrinsic to use for each size.
4264 Intrinsic::ppc_altivec_vslb, Intrinsic::ppc_altivec_vslh, 0,
4265 Intrinsic::ppc_altivec_vslw
4267 Res = BuildIntrinsicOp(IIDs[SplatSize-1], Res, Res, DAG, dl);
4268 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Res);
4271 // vsplti + srl self.
4272 if (SextVal == (int)((unsigned)i >> TypeShiftAmt)) {
4273 SDValue Res = BuildSplatI(i, SplatSize, MVT::Other, DAG, dl);
4274 static const unsigned IIDs[] = { // Intrinsic to use for each size.
4275 Intrinsic::ppc_altivec_vsrb, Intrinsic::ppc_altivec_vsrh, 0,
4276 Intrinsic::ppc_altivec_vsrw
4278 Res = BuildIntrinsicOp(IIDs[SplatSize-1], Res, Res, DAG, dl);
4279 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Res);
4282 // vsplti + sra self.
4283 if (SextVal == (int)((unsigned)i >> TypeShiftAmt)) {
4284 SDValue Res = BuildSplatI(i, SplatSize, MVT::Other, DAG, dl);
4285 static const unsigned IIDs[] = { // Intrinsic to use for each size.
4286 Intrinsic::ppc_altivec_vsrab, Intrinsic::ppc_altivec_vsrah, 0,
4287 Intrinsic::ppc_altivec_vsraw
4289 Res = BuildIntrinsicOp(IIDs[SplatSize-1], Res, Res, DAG, dl);
4290 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Res);
4293 // vsplti + rol self.
4294 if (SextVal == (int)(((unsigned)i << TypeShiftAmt) |
4295 ((unsigned)i >> (SplatBitSize-TypeShiftAmt)))) {
4296 SDValue Res = BuildSplatI(i, SplatSize, MVT::Other, DAG, dl);
4297 static const unsigned IIDs[] = { // Intrinsic to use for each size.
4298 Intrinsic::ppc_altivec_vrlb, Intrinsic::ppc_altivec_vrlh, 0,
4299 Intrinsic::ppc_altivec_vrlw
4301 Res = BuildIntrinsicOp(IIDs[SplatSize-1], Res, Res, DAG, dl);
4302 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Res);
4305 // t = vsplti c, result = vsldoi t, t, 1
4306 if (SextVal == (int)(((unsigned)i << 8) | (i < 0 ? 0xFF : 0))) {
4307 SDValue T = BuildSplatI(i, SplatSize, MVT::v16i8, DAG, dl);
4308 return BuildVSLDOI(T, T, 1, Op.getValueType(), DAG, dl);
4310 // t = vsplti c, result = vsldoi t, t, 2
4311 if (SextVal == (int)(((unsigned)i << 16) | (i < 0 ? 0xFFFF : 0))) {
4312 SDValue T = BuildSplatI(i, SplatSize, MVT::v16i8, DAG, dl);
4313 return BuildVSLDOI(T, T, 2, Op.getValueType(), DAG, dl);
4315 // t = vsplti c, result = vsldoi t, t, 3
4316 if (SextVal == (int)(((unsigned)i << 24) | (i < 0 ? 0xFFFFFF : 0))) {
4317 SDValue T = BuildSplatI(i, SplatSize, MVT::v16i8, DAG, dl);
4318 return BuildVSLDOI(T, T, 3, Op.getValueType(), DAG, dl);
4322 // Three instruction sequences.
4324 // Odd, in range [17,31]: (vsplti C)-(vsplti -16).
4325 if (SextVal >= 0 && SextVal <= 31) {
4326 SDValue LHS = BuildSplatI(SextVal-16, SplatSize, MVT::Other, DAG, dl);
4327 SDValue RHS = BuildSplatI(-16, SplatSize, MVT::Other, DAG, dl);
4328 LHS = DAG.getNode(ISD::SUB, dl, LHS.getValueType(), LHS, RHS);
4329 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), LHS);
4331 // Odd, in range [-31,-17]: (vsplti C)+(vsplti -16).
4332 if (SextVal >= -31 && SextVal <= 0) {
4333 SDValue LHS = BuildSplatI(SextVal+16, SplatSize, MVT::Other, DAG, dl);
4334 SDValue RHS = BuildSplatI(-16, SplatSize, MVT::Other, DAG, dl);
4335 LHS = DAG.getNode(ISD::ADD, dl, LHS.getValueType(), LHS, RHS);
4336 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), LHS);
4342 /// GeneratePerfectShuffle - Given an entry in the perfect-shuffle table, emit
4343 /// the specified operations to build the shuffle.
4344 static SDValue GeneratePerfectShuffle(unsigned PFEntry, SDValue LHS,
4345 SDValue RHS, SelectionDAG &DAG,
4347 unsigned OpNum = (PFEntry >> 26) & 0x0F;
4348 unsigned LHSID = (PFEntry >> 13) & ((1 << 13)-1);
4349 unsigned RHSID = (PFEntry >> 0) & ((1 << 13)-1);
4352 OP_COPY = 0, // Copy, used for things like <u,u,u,3> to say it is <0,1,2,3>
4364 if (OpNum == OP_COPY) {
4365 if (LHSID == (1*9+2)*9+3) return LHS;
4366 assert(LHSID == ((4*9+5)*9+6)*9+7 && "Illegal OP_COPY!");
4370 SDValue OpLHS, OpRHS;
4371 OpLHS = GeneratePerfectShuffle(PerfectShuffleTable[LHSID], LHS, RHS, DAG, dl);
4372 OpRHS = GeneratePerfectShuffle(PerfectShuffleTable[RHSID], LHS, RHS, DAG, dl);
4376 default: llvm_unreachable("Unknown i32 permute!");
4378 ShufIdxs[ 0] = 0; ShufIdxs[ 1] = 1; ShufIdxs[ 2] = 2; ShufIdxs[ 3] = 3;
4379 ShufIdxs[ 4] = 16; ShufIdxs[ 5] = 17; ShufIdxs[ 6] = 18; ShufIdxs[ 7] = 19;
4380 ShufIdxs[ 8] = 4; ShufIdxs[ 9] = 5; ShufIdxs[10] = 6; ShufIdxs[11] = 7;
4381 ShufIdxs[12] = 20; ShufIdxs[13] = 21; ShufIdxs[14] = 22; ShufIdxs[15] = 23;
4384 ShufIdxs[ 0] = 8; ShufIdxs[ 1] = 9; ShufIdxs[ 2] = 10; ShufIdxs[ 3] = 11;
4385 ShufIdxs[ 4] = 24; ShufIdxs[ 5] = 25; ShufIdxs[ 6] = 26; ShufIdxs[ 7] = 27;
4386 ShufIdxs[ 8] = 12; ShufIdxs[ 9] = 13; ShufIdxs[10] = 14; ShufIdxs[11] = 15;
4387 ShufIdxs[12] = 28; ShufIdxs[13] = 29; ShufIdxs[14] = 30; ShufIdxs[15] = 31;
4390 for (unsigned i = 0; i != 16; ++i)
4391 ShufIdxs[i] = (i&3)+0;
4394 for (unsigned i = 0; i != 16; ++i)
4395 ShufIdxs[i] = (i&3)+4;
4398 for (unsigned i = 0; i != 16; ++i)
4399 ShufIdxs[i] = (i&3)+8;
4402 for (unsigned i = 0; i != 16; ++i)
4403 ShufIdxs[i] = (i&3)+12;
4406 return BuildVSLDOI(OpLHS, OpRHS, 4, OpLHS.getValueType(), DAG, dl);
4408 return BuildVSLDOI(OpLHS, OpRHS, 8, OpLHS.getValueType(), DAG, dl);
4410 return BuildVSLDOI(OpLHS, OpRHS, 12, OpLHS.getValueType(), DAG, dl);
4412 EVT VT = OpLHS.getValueType();
4413 OpLHS = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, OpLHS);
4414 OpRHS = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, OpRHS);
4415 SDValue T = DAG.getVectorShuffle(MVT::v16i8, dl, OpLHS, OpRHS, ShufIdxs);
4416 return DAG.getNode(ISD::BITCAST, dl, VT, T);
4419 /// LowerVECTOR_SHUFFLE - Return the code we lower for VECTOR_SHUFFLE. If this
4420 /// is a shuffle we can handle in a single instruction, return it. Otherwise,
4421 /// return the code it can be lowered into. Worst case, it can always be
4422 /// lowered into a vperm.
4423 SDValue PPCTargetLowering::LowerVECTOR_SHUFFLE(SDValue Op,
4424 SelectionDAG &DAG) const {
4425 DebugLoc dl = Op.getDebugLoc();
4426 SDValue V1 = Op.getOperand(0);
4427 SDValue V2 = Op.getOperand(1);
4428 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
4429 EVT VT = Op.getValueType();
4431 // Cases that are handled by instructions that take permute immediates
4432 // (such as vsplt*) should be left as VECTOR_SHUFFLE nodes so they can be
4433 // selected by the instruction selector.
4434 if (V2.getOpcode() == ISD::UNDEF) {
4435 if (PPC::isSplatShuffleMask(SVOp, 1) ||
4436 PPC::isSplatShuffleMask(SVOp, 2) ||
4437 PPC::isSplatShuffleMask(SVOp, 4) ||
4438 PPC::isVPKUWUMShuffleMask(SVOp, true) ||
4439 PPC::isVPKUHUMShuffleMask(SVOp, true) ||
4440 PPC::isVSLDOIShuffleMask(SVOp, true) != -1 ||
4441 PPC::isVMRGLShuffleMask(SVOp, 1, true) ||
4442 PPC::isVMRGLShuffleMask(SVOp, 2, true) ||
4443 PPC::isVMRGLShuffleMask(SVOp, 4, true) ||
4444 PPC::isVMRGHShuffleMask(SVOp, 1, true) ||
4445 PPC::isVMRGHShuffleMask(SVOp, 2, true) ||
4446 PPC::isVMRGHShuffleMask(SVOp, 4, true)) {
4451 // Altivec has a variety of "shuffle immediates" that take two vector inputs
4452 // and produce a fixed permutation. If any of these match, do not lower to
4454 if (PPC::isVPKUWUMShuffleMask(SVOp, false) ||
4455 PPC::isVPKUHUMShuffleMask(SVOp, false) ||
4456 PPC::isVSLDOIShuffleMask(SVOp, false) != -1 ||
4457 PPC::isVMRGLShuffleMask(SVOp, 1, false) ||
4458 PPC::isVMRGLShuffleMask(SVOp, 2, false) ||
4459 PPC::isVMRGLShuffleMask(SVOp, 4, false) ||
4460 PPC::isVMRGHShuffleMask(SVOp, 1, false) ||
4461 PPC::isVMRGHShuffleMask(SVOp, 2, false) ||
4462 PPC::isVMRGHShuffleMask(SVOp, 4, false))
4465 // Check to see if this is a shuffle of 4-byte values. If so, we can use our
4466 // perfect shuffle table to emit an optimal matching sequence.
4467 ArrayRef<int> PermMask = SVOp->getMask();
4469 unsigned PFIndexes[4];
4470 bool isFourElementShuffle = true;
4471 for (unsigned i = 0; i != 4 && isFourElementShuffle; ++i) { // Element number
4472 unsigned EltNo = 8; // Start out undef.
4473 for (unsigned j = 0; j != 4; ++j) { // Intra-element byte.
4474 if (PermMask[i*4+j] < 0)
4475 continue; // Undef, ignore it.
4477 unsigned ByteSource = PermMask[i*4+j];
4478 if ((ByteSource & 3) != j) {
4479 isFourElementShuffle = false;
4484 EltNo = ByteSource/4;
4485 } else if (EltNo != ByteSource/4) {
4486 isFourElementShuffle = false;
4490 PFIndexes[i] = EltNo;
4493 // If this shuffle can be expressed as a shuffle of 4-byte elements, use the
4494 // perfect shuffle vector to determine if it is cost effective to do this as
4495 // discrete instructions, or whether we should use a vperm.
4496 if (isFourElementShuffle) {
4497 // Compute the index in the perfect shuffle table.
4498 unsigned PFTableIndex =
4499 PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3];
4501 unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
4502 unsigned Cost = (PFEntry >> 30);
4504 // Determining when to avoid vperm is tricky. Many things affect the cost
4505 // of vperm, particularly how many times the perm mask needs to be computed.
4506 // For example, if the perm mask can be hoisted out of a loop or is already
4507 // used (perhaps because there are multiple permutes with the same shuffle
4508 // mask?) the vperm has a cost of 1. OTOH, hoisting the permute mask out of
4509 // the loop requires an extra register.
4511 // As a compromise, we only emit discrete instructions if the shuffle can be
4512 // generated in 3 or fewer operations. When we have loop information
4513 // available, if this block is within a loop, we should avoid using vperm
4514 // for 3-operation perms and use a constant pool load instead.
4516 return GeneratePerfectShuffle(PFEntry, V1, V2, DAG, dl);
4519 // Lower this to a VPERM(V1, V2, V3) expression, where V3 is a constant
4520 // vector that will get spilled to the constant pool.
4521 if (V2.getOpcode() == ISD::UNDEF) V2 = V1;
4523 // The SHUFFLE_VECTOR mask is almost exactly what we want for vperm, except
4524 // that it is in input element units, not in bytes. Convert now.
4525 EVT EltVT = V1.getValueType().getVectorElementType();
4526 unsigned BytesPerElement = EltVT.getSizeInBits()/8;
4528 SmallVector<SDValue, 16> ResultMask;
4529 for (unsigned i = 0, e = VT.getVectorNumElements(); i != e; ++i) {
4530 unsigned SrcElt = PermMask[i] < 0 ? 0 : PermMask[i];
4532 for (unsigned j = 0; j != BytesPerElement; ++j)
4533 ResultMask.push_back(DAG.getConstant(SrcElt*BytesPerElement+j,
4537 SDValue VPermMask = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v16i8,
4538 &ResultMask[0], ResultMask.size());
4539 return DAG.getNode(PPCISD::VPERM, dl, V1.getValueType(), V1, V2, VPermMask);
4542 /// getAltivecCompareInfo - Given an intrinsic, return false if it is not an
4543 /// altivec comparison. If it is, return true and fill in Opc/isDot with
4544 /// information about the intrinsic.
4545 static bool getAltivecCompareInfo(SDValue Intrin, int &CompareOpc,
4547 unsigned IntrinsicID =
4548 cast<ConstantSDNode>(Intrin.getOperand(0))->getZExtValue();
4551 switch (IntrinsicID) {
4552 default: return false;
4553 // Comparison predicates.
4554 case Intrinsic::ppc_altivec_vcmpbfp_p: CompareOpc = 966; isDot = 1; break;
4555 case Intrinsic::ppc_altivec_vcmpeqfp_p: CompareOpc = 198; isDot = 1; break;
4556 case Intrinsic::ppc_altivec_vcmpequb_p: CompareOpc = 6; isDot = 1; break;
4557 case Intrinsic::ppc_altivec_vcmpequh_p: CompareOpc = 70; isDot = 1; break;
4558 case Intrinsic::ppc_altivec_vcmpequw_p: CompareOpc = 134; isDot = 1; break;
4559 case Intrinsic::ppc_altivec_vcmpgefp_p: CompareOpc = 454; isDot = 1; break;
4560 case Intrinsic::ppc_altivec_vcmpgtfp_p: CompareOpc = 710; isDot = 1; break;
4561 case Intrinsic::ppc_altivec_vcmpgtsb_p: CompareOpc = 774; isDot = 1; break;
4562 case Intrinsic::ppc_altivec_vcmpgtsh_p: CompareOpc = 838; isDot = 1; break;
4563 case Intrinsic::ppc_altivec_vcmpgtsw_p: CompareOpc = 902; isDot = 1; break;
4564 case Intrinsic::ppc_altivec_vcmpgtub_p: CompareOpc = 518; isDot = 1; break;
4565 case Intrinsic::ppc_altivec_vcmpgtuh_p: CompareOpc = 582; isDot = 1; break;
4566 case Intrinsic::ppc_altivec_vcmpgtuw_p: CompareOpc = 646; isDot = 1; break;
4568 // Normal Comparisons.
4569 case Intrinsic::ppc_altivec_vcmpbfp: CompareOpc = 966; isDot = 0; break;
4570 case Intrinsic::ppc_altivec_vcmpeqfp: CompareOpc = 198; isDot = 0; break;
4571 case Intrinsic::ppc_altivec_vcmpequb: CompareOpc = 6; isDot = 0; break;
4572 case Intrinsic::ppc_altivec_vcmpequh: CompareOpc = 70; isDot = 0; break;
4573 case Intrinsic::ppc_altivec_vcmpequw: CompareOpc = 134; isDot = 0; break;
4574 case Intrinsic::ppc_altivec_vcmpgefp: CompareOpc = 454; isDot = 0; break;
4575 case Intrinsic::ppc_altivec_vcmpgtfp: CompareOpc = 710; isDot = 0; break;
4576 case Intrinsic::ppc_altivec_vcmpgtsb: CompareOpc = 774; isDot = 0; break;
4577 case Intrinsic::ppc_altivec_vcmpgtsh: CompareOpc = 838; isDot = 0; break;
4578 case Intrinsic::ppc_altivec_vcmpgtsw: CompareOpc = 902; isDot = 0; break;
4579 case Intrinsic::ppc_altivec_vcmpgtub: CompareOpc = 518; isDot = 0; break;
4580 case Intrinsic::ppc_altivec_vcmpgtuh: CompareOpc = 582; isDot = 0; break;
4581 case Intrinsic::ppc_altivec_vcmpgtuw: CompareOpc = 646; isDot = 0; break;
4586 /// LowerINTRINSIC_WO_CHAIN - If this is an intrinsic that we want to custom
4587 /// lower, do it, otherwise return null.
4588 SDValue PPCTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op,
4589 SelectionDAG &DAG) const {
4590 // If this is a lowered altivec predicate compare, CompareOpc is set to the
4591 // opcode number of the comparison.
4592 DebugLoc dl = Op.getDebugLoc();
4595 if (!getAltivecCompareInfo(Op, CompareOpc, isDot))
4596 return SDValue(); // Don't custom lower most intrinsics.
4598 // If this is a non-dot comparison, make the VCMP node and we are done.
4600 SDValue Tmp = DAG.getNode(PPCISD::VCMP, dl, Op.getOperand(2).getValueType(),
4601 Op.getOperand(1), Op.getOperand(2),
4602 DAG.getConstant(CompareOpc, MVT::i32));
4603 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Tmp);
4606 // Create the PPCISD altivec 'dot' comparison node.
4608 Op.getOperand(2), // LHS
4609 Op.getOperand(3), // RHS
4610 DAG.getConstant(CompareOpc, MVT::i32)
4612 std::vector<EVT> VTs;
4613 VTs.push_back(Op.getOperand(2).getValueType());
4614 VTs.push_back(MVT::Glue);
4615 SDValue CompNode = DAG.getNode(PPCISD::VCMPo, dl, VTs, Ops, 3);
4617 // Now that we have the comparison, emit a copy from the CR to a GPR.
4618 // This is flagged to the above dot comparison.
4619 SDValue Flags = DAG.getNode(PPCISD::MFCR, dl, MVT::i32,
4620 DAG.getRegister(PPC::CR6, MVT::i32),
4621 CompNode.getValue(1));
4623 // Unpack the result based on how the target uses it.
4624 unsigned BitNo; // Bit # of CR6.
4625 bool InvertBit; // Invert result?
4626 switch (cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue()) {
4627 default: // Can't happen, don't crash on invalid number though.
4628 case 0: // Return the value of the EQ bit of CR6.
4629 BitNo = 0; InvertBit = false;
4631 case 1: // Return the inverted value of the EQ bit of CR6.
4632 BitNo = 0; InvertBit = true;
4634 case 2: // Return the value of the LT bit of CR6.
4635 BitNo = 2; InvertBit = false;
4637 case 3: // Return the inverted value of the LT bit of CR6.
4638 BitNo = 2; InvertBit = true;
4642 // Shift the bit into the low position.
4643 Flags = DAG.getNode(ISD::SRL, dl, MVT::i32, Flags,
4644 DAG.getConstant(8-(3-BitNo), MVT::i32));
4646 Flags = DAG.getNode(ISD::AND, dl, MVT::i32, Flags,
4647 DAG.getConstant(1, MVT::i32));
4649 // If we are supposed to, toggle the bit.
4651 Flags = DAG.getNode(ISD::XOR, dl, MVT::i32, Flags,
4652 DAG.getConstant(1, MVT::i32));
4656 SDValue PPCTargetLowering::LowerSCALAR_TO_VECTOR(SDValue Op,
4657 SelectionDAG &DAG) const {
4658 DebugLoc dl = Op.getDebugLoc();
4659 // Create a stack slot that is 16-byte aligned.
4660 MachineFrameInfo *FrameInfo = DAG.getMachineFunction().getFrameInfo();
4661 int FrameIdx = FrameInfo->CreateStackObject(16, 16, false);
4662 EVT PtrVT = getPointerTy();
4663 SDValue FIdx = DAG.getFrameIndex(FrameIdx, PtrVT);
4665 // Store the input value into Value#0 of the stack slot.
4666 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl,
4667 Op.getOperand(0), FIdx, MachinePointerInfo(),
4670 return DAG.getLoad(Op.getValueType(), dl, Store, FIdx, MachinePointerInfo(),
4671 false, false, false, 0);
4674 SDValue PPCTargetLowering::LowerMUL(SDValue Op, SelectionDAG &DAG) const {
4675 DebugLoc dl = Op.getDebugLoc();
4676 if (Op.getValueType() == MVT::v4i32) {
4677 SDValue LHS = Op.getOperand(0), RHS = Op.getOperand(1);
4679 SDValue Zero = BuildSplatI( 0, 1, MVT::v4i32, DAG, dl);
4680 SDValue Neg16 = BuildSplatI(-16, 4, MVT::v4i32, DAG, dl);//+16 as shift amt.
4682 SDValue RHSSwap = // = vrlw RHS, 16
4683 BuildIntrinsicOp(Intrinsic::ppc_altivec_vrlw, RHS, Neg16, DAG, dl);
4685 // Shrinkify inputs to v8i16.
4686 LHS = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, LHS);
4687 RHS = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, RHS);
4688 RHSSwap = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, RHSSwap);
4690 // Low parts multiplied together, generating 32-bit results (we ignore the
4692 SDValue LoProd = BuildIntrinsicOp(Intrinsic::ppc_altivec_vmulouh,
4693 LHS, RHS, DAG, dl, MVT::v4i32);
4695 SDValue HiProd = BuildIntrinsicOp(Intrinsic::ppc_altivec_vmsumuhm,
4696 LHS, RHSSwap, Zero, DAG, dl, MVT::v4i32);
4697 // Shift the high parts up 16 bits.
4698 HiProd = BuildIntrinsicOp(Intrinsic::ppc_altivec_vslw, HiProd,
4700 return DAG.getNode(ISD::ADD, dl, MVT::v4i32, LoProd, HiProd);
4701 } else if (Op.getValueType() == MVT::v8i16) {
4702 SDValue LHS = Op.getOperand(0), RHS = Op.getOperand(1);
4704 SDValue Zero = BuildSplatI(0, 1, MVT::v8i16, DAG, dl);
4706 return BuildIntrinsicOp(Intrinsic::ppc_altivec_vmladduhm,
4707 LHS, RHS, Zero, DAG, dl);
4708 } else if (Op.getValueType() == MVT::v16i8) {
4709 SDValue LHS = Op.getOperand(0), RHS = Op.getOperand(1);
4711 // Multiply the even 8-bit parts, producing 16-bit sums.
4712 SDValue EvenParts = BuildIntrinsicOp(Intrinsic::ppc_altivec_vmuleub,
4713 LHS, RHS, DAG, dl, MVT::v8i16);
4714 EvenParts = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, EvenParts);
4716 // Multiply the odd 8-bit parts, producing 16-bit sums.
4717 SDValue OddParts = BuildIntrinsicOp(Intrinsic::ppc_altivec_vmuloub,
4718 LHS, RHS, DAG, dl, MVT::v8i16);
4719 OddParts = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, OddParts);
4721 // Merge the results together.
4723 for (unsigned i = 0; i != 8; ++i) {
4725 Ops[i*2+1] = 2*i+1+16;
4727 return DAG.getVectorShuffle(MVT::v16i8, dl, EvenParts, OddParts, Ops);
4729 llvm_unreachable("Unknown mul to lower!");
4733 /// LowerOperation - Provide custom lowering hooks for some operations.
4735 SDValue PPCTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
4736 switch (Op.getOpcode()) {
4737 default: llvm_unreachable("Wasn't expecting to be able to lower this!");
4738 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
4739 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
4740 case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
4741 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
4742 case ISD::JumpTable: return LowerJumpTable(Op, DAG);
4743 case ISD::SETCC: return LowerSETCC(Op, DAG);
4744 case ISD::INIT_TRAMPOLINE: return LowerINIT_TRAMPOLINE(Op, DAG);
4745 case ISD::ADJUST_TRAMPOLINE: return LowerADJUST_TRAMPOLINE(Op, DAG);
4747 return LowerVASTART(Op, DAG, PPCSubTarget);
4750 return LowerVAARG(Op, DAG, PPCSubTarget);
4752 case ISD::STACKRESTORE: return LowerSTACKRESTORE(Op, DAG, PPCSubTarget);
4753 case ISD::DYNAMIC_STACKALLOC:
4754 return LowerDYNAMIC_STACKALLOC(Op, DAG, PPCSubTarget);
4756 case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
4757 case ISD::FP_TO_UINT:
4758 case ISD::FP_TO_SINT: return LowerFP_TO_INT(Op, DAG,
4760 case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);
4761 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
4763 // Lower 64-bit shifts.
4764 case ISD::SHL_PARTS: return LowerSHL_PARTS(Op, DAG);
4765 case ISD::SRL_PARTS: return LowerSRL_PARTS(Op, DAG);
4766 case ISD::SRA_PARTS: return LowerSRA_PARTS(Op, DAG);
4768 // Vector-related lowering.
4769 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG);
4770 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
4771 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
4772 case ISD::SCALAR_TO_VECTOR: return LowerSCALAR_TO_VECTOR(Op, DAG);
4773 case ISD::MUL: return LowerMUL(Op, DAG);
4775 // Frame & Return address.
4776 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
4777 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
4781 void PPCTargetLowering::ReplaceNodeResults(SDNode *N,
4782 SmallVectorImpl<SDValue>&Results,
4783 SelectionDAG &DAG) const {
4784 const TargetMachine &TM = getTargetMachine();
4785 DebugLoc dl = N->getDebugLoc();
4786 switch (N->getOpcode()) {
4788 llvm_unreachable("Do not know how to custom type legalize this operation!");
4790 if (!TM.getSubtarget<PPCSubtarget>().isSVR4ABI()
4791 || TM.getSubtarget<PPCSubtarget>().isPPC64())
4794 EVT VT = N->getValueType(0);
4796 if (VT == MVT::i64) {
4797 SDValue NewNode = LowerVAARG(SDValue(N, 1), DAG, PPCSubTarget);
4799 Results.push_back(NewNode);
4800 Results.push_back(NewNode.getValue(1));
4804 case ISD::FP_ROUND_INREG: {
4805 assert(N->getValueType(0) == MVT::ppcf128);
4806 assert(N->getOperand(0).getValueType() == MVT::ppcf128);
4807 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl,
4808 MVT::f64, N->getOperand(0),
4809 DAG.getIntPtrConstant(0));
4810 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl,
4811 MVT::f64, N->getOperand(0),
4812 DAG.getIntPtrConstant(1));
4814 // This sequence changes FPSCR to do round-to-zero, adds the two halves
4815 // of the long double, and puts FPSCR back the way it was. We do not
4816 // actually model FPSCR.
4817 std::vector<EVT> NodeTys;
4818 SDValue Ops[4], Result, MFFSreg, InFlag, FPreg;
4820 NodeTys.push_back(MVT::f64); // Return register
4821 NodeTys.push_back(MVT::Glue); // Returns a flag for later insns
4822 Result = DAG.getNode(PPCISD::MFFS, dl, NodeTys, &InFlag, 0);
4823 MFFSreg = Result.getValue(0);
4824 InFlag = Result.getValue(1);
4827 NodeTys.push_back(MVT::Glue); // Returns a flag
4828 Ops[0] = DAG.getConstant(31, MVT::i32);
4830 Result = DAG.getNode(PPCISD::MTFSB1, dl, NodeTys, Ops, 2);
4831 InFlag = Result.getValue(0);
4834 NodeTys.push_back(MVT::Glue); // Returns a flag
4835 Ops[0] = DAG.getConstant(30, MVT::i32);
4837 Result = DAG.getNode(PPCISD::MTFSB0, dl, NodeTys, Ops, 2);
4838 InFlag = Result.getValue(0);
4841 NodeTys.push_back(MVT::f64); // result of add
4842 NodeTys.push_back(MVT::Glue); // Returns a flag
4846 Result = DAG.getNode(PPCISD::FADDRTZ, dl, NodeTys, Ops, 3);
4847 FPreg = Result.getValue(0);
4848 InFlag = Result.getValue(1);
4851 NodeTys.push_back(MVT::f64);
4852 Ops[0] = DAG.getConstant(1, MVT::i32);
4856 Result = DAG.getNode(PPCISD::MTFSF, dl, NodeTys, Ops, 4);
4857 FPreg = Result.getValue(0);
4859 // We know the low half is about to be thrown away, so just use something
4861 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::ppcf128,
4865 case ISD::FP_TO_SINT:
4866 Results.push_back(LowerFP_TO_INT(SDValue(N, 0), DAG, dl));
4872 //===----------------------------------------------------------------------===//
4873 // Other Lowering Code
4874 //===----------------------------------------------------------------------===//
4877 PPCTargetLowering::EmitAtomicBinary(MachineInstr *MI, MachineBasicBlock *BB,
4878 bool is64bit, unsigned BinOpcode) const {
4879 // This also handles ATOMIC_SWAP, indicated by BinOpcode==0.
4880 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
4882 const BasicBlock *LLVM_BB = BB->getBasicBlock();
4883 MachineFunction *F = BB->getParent();
4884 MachineFunction::iterator It = BB;
4887 unsigned dest = MI->getOperand(0).getReg();
4888 unsigned ptrA = MI->getOperand(1).getReg();
4889 unsigned ptrB = MI->getOperand(2).getReg();
4890 unsigned incr = MI->getOperand(3).getReg();
4891 DebugLoc dl = MI->getDebugLoc();
4893 MachineBasicBlock *loopMBB = F->CreateMachineBasicBlock(LLVM_BB);
4894 MachineBasicBlock *exitMBB = F->CreateMachineBasicBlock(LLVM_BB);
4895 F->insert(It, loopMBB);
4896 F->insert(It, exitMBB);
4897 exitMBB->splice(exitMBB->begin(), BB,
4898 llvm::next(MachineBasicBlock::iterator(MI)),
4900 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
4902 MachineRegisterInfo &RegInfo = F->getRegInfo();
4903 unsigned TmpReg = (!BinOpcode) ? incr :
4904 RegInfo.createVirtualRegister(
4905 is64bit ? (const TargetRegisterClass *) &PPC::G8RCRegClass :
4906 (const TargetRegisterClass *) &PPC::GPRCRegClass);
4910 // fallthrough --> loopMBB
4911 BB->addSuccessor(loopMBB);
4914 // l[wd]arx dest, ptr
4915 // add r0, dest, incr
4916 // st[wd]cx. r0, ptr
4918 // fallthrough --> exitMBB
4920 BuildMI(BB, dl, TII->get(is64bit ? PPC::LDARX : PPC::LWARX), dest)
4921 .addReg(ptrA).addReg(ptrB);
4923 BuildMI(BB, dl, TII->get(BinOpcode), TmpReg).addReg(incr).addReg(dest);
4924 BuildMI(BB, dl, TII->get(is64bit ? PPC::STDCX : PPC::STWCX))
4925 .addReg(TmpReg).addReg(ptrA).addReg(ptrB);
4926 BuildMI(BB, dl, TII->get(PPC::BCC))
4927 .addImm(PPC::PRED_NE).addReg(PPC::CR0).addMBB(loopMBB);
4928 BB->addSuccessor(loopMBB);
4929 BB->addSuccessor(exitMBB);
4938 PPCTargetLowering::EmitPartwordAtomicBinary(MachineInstr *MI,
4939 MachineBasicBlock *BB,
4940 bool is8bit, // operation
4941 unsigned BinOpcode) const {
4942 // This also handles ATOMIC_SWAP, indicated by BinOpcode==0.
4943 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
4944 // In 64 bit mode we have to use 64 bits for addresses, even though the
4945 // lwarx/stwcx are 32 bits. With the 32-bit atomics we can use address
4946 // registers without caring whether they're 32 or 64, but here we're
4947 // doing actual arithmetic on the addresses.
4948 bool is64bit = PPCSubTarget.isPPC64();
4949 unsigned ZeroReg = is64bit ? PPC::X0 : PPC::R0;
4951 const BasicBlock *LLVM_BB = BB->getBasicBlock();
4952 MachineFunction *F = BB->getParent();
4953 MachineFunction::iterator It = BB;
4956 unsigned dest = MI->getOperand(0).getReg();
4957 unsigned ptrA = MI->getOperand(1).getReg();
4958 unsigned ptrB = MI->getOperand(2).getReg();
4959 unsigned incr = MI->getOperand(3).getReg();
4960 DebugLoc dl = MI->getDebugLoc();
4962 MachineBasicBlock *loopMBB = F->CreateMachineBasicBlock(LLVM_BB);
4963 MachineBasicBlock *exitMBB = F->CreateMachineBasicBlock(LLVM_BB);
4964 F->insert(It, loopMBB);
4965 F->insert(It, exitMBB);
4966 exitMBB->splice(exitMBB->begin(), BB,
4967 llvm::next(MachineBasicBlock::iterator(MI)),
4969 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
4971 MachineRegisterInfo &RegInfo = F->getRegInfo();
4972 const TargetRegisterClass *RC =
4973 is64bit ? (const TargetRegisterClass *) &PPC::G8RCRegClass :
4974 (const TargetRegisterClass *) &PPC::GPRCRegClass;
4975 unsigned PtrReg = RegInfo.createVirtualRegister(RC);
4976 unsigned Shift1Reg = RegInfo.createVirtualRegister(RC);
4977 unsigned ShiftReg = RegInfo.createVirtualRegister(RC);
4978 unsigned Incr2Reg = RegInfo.createVirtualRegister(RC);
4979 unsigned MaskReg = RegInfo.createVirtualRegister(RC);
4980 unsigned Mask2Reg = RegInfo.createVirtualRegister(RC);
4981 unsigned Mask3Reg = RegInfo.createVirtualRegister(RC);
4982 unsigned Tmp2Reg = RegInfo.createVirtualRegister(RC);
4983 unsigned Tmp3Reg = RegInfo.createVirtualRegister(RC);
4984 unsigned Tmp4Reg = RegInfo.createVirtualRegister(RC);
4985 unsigned TmpDestReg = RegInfo.createVirtualRegister(RC);
4987 unsigned TmpReg = (!BinOpcode) ? Incr2Reg : RegInfo.createVirtualRegister(RC);
4991 // fallthrough --> loopMBB
4992 BB->addSuccessor(loopMBB);
4994 // The 4-byte load must be aligned, while a char or short may be
4995 // anywhere in the word. Hence all this nasty bookkeeping code.
4996 // add ptr1, ptrA, ptrB [copy if ptrA==0]
4997 // rlwinm shift1, ptr1, 3, 27, 28 [3, 27, 27]
4998 // xori shift, shift1, 24 [16]
4999 // rlwinm ptr, ptr1, 0, 0, 29
5000 // slw incr2, incr, shift
5001 // li mask2, 255 [li mask3, 0; ori mask2, mask3, 65535]
5002 // slw mask, mask2, shift
5004 // lwarx tmpDest, ptr
5005 // add tmp, tmpDest, incr2
5006 // andc tmp2, tmpDest, mask
5007 // and tmp3, tmp, mask
5008 // or tmp4, tmp3, tmp2
5011 // fallthrough --> exitMBB
5012 // srw dest, tmpDest, shift
5013 if (ptrA != ZeroReg) {
5014 Ptr1Reg = RegInfo.createVirtualRegister(RC);
5015 BuildMI(BB, dl, TII->get(is64bit ? PPC::ADD8 : PPC::ADD4), Ptr1Reg)
5016 .addReg(ptrA).addReg(ptrB);
5020 BuildMI(BB, dl, TII->get(PPC::RLWINM), Shift1Reg).addReg(Ptr1Reg)
5021 .addImm(3).addImm(27).addImm(is8bit ? 28 : 27);
5022 BuildMI(BB, dl, TII->get(is64bit ? PPC::XORI8 : PPC::XORI), ShiftReg)
5023 .addReg(Shift1Reg).addImm(is8bit ? 24 : 16);
5025 BuildMI(BB, dl, TII->get(PPC::RLDICR), PtrReg)
5026 .addReg(Ptr1Reg).addImm(0).addImm(61);
5028 BuildMI(BB, dl, TII->get(PPC::RLWINM), PtrReg)
5029 .addReg(Ptr1Reg).addImm(0).addImm(0).addImm(29);
5030 BuildMI(BB, dl, TII->get(PPC::SLW), Incr2Reg)
5031 .addReg(incr).addReg(ShiftReg);
5033 BuildMI(BB, dl, TII->get(PPC::LI), Mask2Reg).addImm(255);
5035 BuildMI(BB, dl, TII->get(PPC::LI), Mask3Reg).addImm(0);
5036 BuildMI(BB, dl, TII->get(PPC::ORI),Mask2Reg).addReg(Mask3Reg).addImm(65535);
5038 BuildMI(BB, dl, TII->get(PPC::SLW), MaskReg)
5039 .addReg(Mask2Reg).addReg(ShiftReg);
5042 BuildMI(BB, dl, TII->get(PPC::LWARX), TmpDestReg)
5043 .addReg(ZeroReg).addReg(PtrReg);
5045 BuildMI(BB, dl, TII->get(BinOpcode), TmpReg)
5046 .addReg(Incr2Reg).addReg(TmpDestReg);
5047 BuildMI(BB, dl, TII->get(is64bit ? PPC::ANDC8 : PPC::ANDC), Tmp2Reg)
5048 .addReg(TmpDestReg).addReg(MaskReg);
5049 BuildMI(BB, dl, TII->get(is64bit ? PPC::AND8 : PPC::AND), Tmp3Reg)
5050 .addReg(TmpReg).addReg(MaskReg);
5051 BuildMI(BB, dl, TII->get(is64bit ? PPC::OR8 : PPC::OR), Tmp4Reg)
5052 .addReg(Tmp3Reg).addReg(Tmp2Reg);
5053 BuildMI(BB, dl, TII->get(is64bit ? PPC::STDCX : PPC::STWCX))
5054 .addReg(Tmp4Reg).addReg(ZeroReg).addReg(PtrReg);
5055 BuildMI(BB, dl, TII->get(PPC::BCC))
5056 .addImm(PPC::PRED_NE).addReg(PPC::CR0).addMBB(loopMBB);
5057 BB->addSuccessor(loopMBB);
5058 BB->addSuccessor(exitMBB);
5063 BuildMI(*BB, BB->begin(), dl, TII->get(PPC::SRW), dest).addReg(TmpDestReg)
5069 PPCTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
5070 MachineBasicBlock *BB) const {
5071 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5073 // To "insert" these instructions we actually have to insert their
5074 // control-flow patterns.
5075 const BasicBlock *LLVM_BB = BB->getBasicBlock();
5076 MachineFunction::iterator It = BB;
5079 MachineFunction *F = BB->getParent();
5081 if (PPCSubTarget.hasISEL() && (MI->getOpcode() == PPC::SELECT_CC_I4 ||
5082 MI->getOpcode() == PPC::SELECT_CC_I8)) {
5083 unsigned OpCode = MI->getOpcode() == PPC::SELECT_CC_I8 ?
5084 PPC::ISEL8 : PPC::ISEL;
5085 unsigned SelectPred = MI->getOperand(4).getImm();
5086 DebugLoc dl = MI->getDebugLoc();
5088 // The SelectPred is ((BI << 5) | BO) for a BCC
5089 unsigned BO = SelectPred & 0xF;
5090 assert((BO == 12 || BO == 4) && "invalid predicate BO field for isel");
5092 unsigned TrueOpNo, FalseOpNo;
5099 SelectPred = PPC::InvertPredicate((PPC::Predicate)SelectPred);
5102 BuildMI(*BB, MI, dl, TII->get(OpCode), MI->getOperand(0).getReg())
5103 .addReg(MI->getOperand(TrueOpNo).getReg())
5104 .addReg(MI->getOperand(FalseOpNo).getReg())
5105 .addImm(SelectPred).addReg(MI->getOperand(1).getReg());
5106 } else if (MI->getOpcode() == PPC::SELECT_CC_I4 ||
5107 MI->getOpcode() == PPC::SELECT_CC_I8 ||
5108 MI->getOpcode() == PPC::SELECT_CC_F4 ||
5109 MI->getOpcode() == PPC::SELECT_CC_F8 ||
5110 MI->getOpcode() == PPC::SELECT_CC_VRRC) {
5113 // The incoming instruction knows the destination vreg to set, the
5114 // condition code register to branch on, the true/false values to
5115 // select between, and a branch opcode to use.
5120 // cmpTY ccX, r1, r2
5122 // fallthrough --> copy0MBB
5123 MachineBasicBlock *thisMBB = BB;
5124 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
5125 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
5126 unsigned SelectPred = MI->getOperand(4).getImm();
5127 DebugLoc dl = MI->getDebugLoc();
5128 F->insert(It, copy0MBB);
5129 F->insert(It, sinkMBB);
5131 // Transfer the remainder of BB and its successor edges to sinkMBB.
5132 sinkMBB->splice(sinkMBB->begin(), BB,
5133 llvm::next(MachineBasicBlock::iterator(MI)),
5135 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
5137 // Next, add the true and fallthrough blocks as its successors.
5138 BB->addSuccessor(copy0MBB);
5139 BB->addSuccessor(sinkMBB);
5141 BuildMI(BB, dl, TII->get(PPC::BCC))
5142 .addImm(SelectPred).addReg(MI->getOperand(1).getReg()).addMBB(sinkMBB);
5145 // %FalseValue = ...
5146 // # fallthrough to sinkMBB
5149 // Update machine-CFG edges
5150 BB->addSuccessor(sinkMBB);
5153 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
5156 BuildMI(*BB, BB->begin(), dl,
5157 TII->get(PPC::PHI), MI->getOperand(0).getReg())
5158 .addReg(MI->getOperand(3).getReg()).addMBB(copy0MBB)
5159 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
5161 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_ADD_I8)
5162 BB = EmitPartwordAtomicBinary(MI, BB, true, PPC::ADD4);
5163 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_ADD_I16)
5164 BB = EmitPartwordAtomicBinary(MI, BB, false, PPC::ADD4);
5165 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_ADD_I32)
5166 BB = EmitAtomicBinary(MI, BB, false, PPC::ADD4);
5167 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_ADD_I64)
5168 BB = EmitAtomicBinary(MI, BB, true, PPC::ADD8);
5170 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_AND_I8)
5171 BB = EmitPartwordAtomicBinary(MI, BB, true, PPC::AND);
5172 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_AND_I16)
5173 BB = EmitPartwordAtomicBinary(MI, BB, false, PPC::AND);
5174 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_AND_I32)
5175 BB = EmitAtomicBinary(MI, BB, false, PPC::AND);
5176 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_AND_I64)
5177 BB = EmitAtomicBinary(MI, BB, true, PPC::AND8);
5179 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_OR_I8)
5180 BB = EmitPartwordAtomicBinary(MI, BB, true, PPC::OR);
5181 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_OR_I16)
5182 BB = EmitPartwordAtomicBinary(MI, BB, false, PPC::OR);
5183 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_OR_I32)
5184 BB = EmitAtomicBinary(MI, BB, false, PPC::OR);
5185 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_OR_I64)
5186 BB = EmitAtomicBinary(MI, BB, true, PPC::OR8);
5188 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_XOR_I8)
5189 BB = EmitPartwordAtomicBinary(MI, BB, true, PPC::XOR);
5190 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_XOR_I16)
5191 BB = EmitPartwordAtomicBinary(MI, BB, false, PPC::XOR);
5192 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_XOR_I32)
5193 BB = EmitAtomicBinary(MI, BB, false, PPC::XOR);
5194 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_XOR_I64)
5195 BB = EmitAtomicBinary(MI, BB, true, PPC::XOR8);
5197 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_NAND_I8)
5198 BB = EmitPartwordAtomicBinary(MI, BB, true, PPC::ANDC);
5199 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_NAND_I16)
5200 BB = EmitPartwordAtomicBinary(MI, BB, false, PPC::ANDC);
5201 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_NAND_I32)
5202 BB = EmitAtomicBinary(MI, BB, false, PPC::ANDC);
5203 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_NAND_I64)
5204 BB = EmitAtomicBinary(MI, BB, true, PPC::ANDC8);
5206 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_SUB_I8)
5207 BB = EmitPartwordAtomicBinary(MI, BB, true, PPC::SUBF);
5208 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_SUB_I16)
5209 BB = EmitPartwordAtomicBinary(MI, BB, false, PPC::SUBF);
5210 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_SUB_I32)
5211 BB = EmitAtomicBinary(MI, BB, false, PPC::SUBF);
5212 else if (MI->getOpcode() == PPC::ATOMIC_LOAD_SUB_I64)
5213 BB = EmitAtomicBinary(MI, BB, true, PPC::SUBF8);
5215 else if (MI->getOpcode() == PPC::ATOMIC_SWAP_I8)
5216 BB = EmitPartwordAtomicBinary(MI, BB, true, 0);
5217 else if (MI->getOpcode() == PPC::ATOMIC_SWAP_I16)
5218 BB = EmitPartwordAtomicBinary(MI, BB, false, 0);
5219 else if (MI->getOpcode() == PPC::ATOMIC_SWAP_I32)
5220 BB = EmitAtomicBinary(MI, BB, false, 0);
5221 else if (MI->getOpcode() == PPC::ATOMIC_SWAP_I64)
5222 BB = EmitAtomicBinary(MI, BB, true, 0);
5224 else if (MI->getOpcode() == PPC::ATOMIC_CMP_SWAP_I32 ||
5225 MI->getOpcode() == PPC::ATOMIC_CMP_SWAP_I64) {
5226 bool is64bit = MI->getOpcode() == PPC::ATOMIC_CMP_SWAP_I64;
5228 unsigned dest = MI->getOperand(0).getReg();
5229 unsigned ptrA = MI->getOperand(1).getReg();
5230 unsigned ptrB = MI->getOperand(2).getReg();
5231 unsigned oldval = MI->getOperand(3).getReg();
5232 unsigned newval = MI->getOperand(4).getReg();
5233 DebugLoc dl = MI->getDebugLoc();
5235 MachineBasicBlock *loop1MBB = F->CreateMachineBasicBlock(LLVM_BB);
5236 MachineBasicBlock *loop2MBB = F->CreateMachineBasicBlock(LLVM_BB);
5237 MachineBasicBlock *midMBB = F->CreateMachineBasicBlock(LLVM_BB);
5238 MachineBasicBlock *exitMBB = F->CreateMachineBasicBlock(LLVM_BB);
5239 F->insert(It, loop1MBB);
5240 F->insert(It, loop2MBB);
5241 F->insert(It, midMBB);
5242 F->insert(It, exitMBB);
5243 exitMBB->splice(exitMBB->begin(), BB,
5244 llvm::next(MachineBasicBlock::iterator(MI)),
5246 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
5250 // fallthrough --> loopMBB
5251 BB->addSuccessor(loop1MBB);
5254 // l[wd]arx dest, ptr
5255 // cmp[wd] dest, oldval
5258 // st[wd]cx. newval, ptr
5262 // st[wd]cx. dest, ptr
5265 BuildMI(BB, dl, TII->get(is64bit ? PPC::LDARX : PPC::LWARX), dest)
5266 .addReg(ptrA).addReg(ptrB);
5267 BuildMI(BB, dl, TII->get(is64bit ? PPC::CMPD : PPC::CMPW), PPC::CR0)
5268 .addReg(oldval).addReg(dest);
5269 BuildMI(BB, dl, TII->get(PPC::BCC))
5270 .addImm(PPC::PRED_NE).addReg(PPC::CR0).addMBB(midMBB);
5271 BB->addSuccessor(loop2MBB);
5272 BB->addSuccessor(midMBB);
5275 BuildMI(BB, dl, TII->get(is64bit ? PPC::STDCX : PPC::STWCX))
5276 .addReg(newval).addReg(ptrA).addReg(ptrB);
5277 BuildMI(BB, dl, TII->get(PPC::BCC))
5278 .addImm(PPC::PRED_NE).addReg(PPC::CR0).addMBB(loop1MBB);
5279 BuildMI(BB, dl, TII->get(PPC::B)).addMBB(exitMBB);
5280 BB->addSuccessor(loop1MBB);
5281 BB->addSuccessor(exitMBB);
5284 BuildMI(BB, dl, TII->get(is64bit ? PPC::STDCX : PPC::STWCX))
5285 .addReg(dest).addReg(ptrA).addReg(ptrB);
5286 BB->addSuccessor(exitMBB);
5291 } else if (MI->getOpcode() == PPC::ATOMIC_CMP_SWAP_I8 ||
5292 MI->getOpcode() == PPC::ATOMIC_CMP_SWAP_I16) {
5293 // We must use 64-bit registers for addresses when targeting 64-bit,
5294 // since we're actually doing arithmetic on them. Other registers
5296 bool is64bit = PPCSubTarget.isPPC64();
5297 bool is8bit = MI->getOpcode() == PPC::ATOMIC_CMP_SWAP_I8;
5299 unsigned dest = MI->getOperand(0).getReg();
5300 unsigned ptrA = MI->getOperand(1).getReg();
5301 unsigned ptrB = MI->getOperand(2).getReg();
5302 unsigned oldval = MI->getOperand(3).getReg();
5303 unsigned newval = MI->getOperand(4).getReg();
5304 DebugLoc dl = MI->getDebugLoc();
5306 MachineBasicBlock *loop1MBB = F->CreateMachineBasicBlock(LLVM_BB);
5307 MachineBasicBlock *loop2MBB = F->CreateMachineBasicBlock(LLVM_BB);
5308 MachineBasicBlock *midMBB = F->CreateMachineBasicBlock(LLVM_BB);
5309 MachineBasicBlock *exitMBB = F->CreateMachineBasicBlock(LLVM_BB);
5310 F->insert(It, loop1MBB);
5311 F->insert(It, loop2MBB);
5312 F->insert(It, midMBB);
5313 F->insert(It, exitMBB);
5314 exitMBB->splice(exitMBB->begin(), BB,
5315 llvm::next(MachineBasicBlock::iterator(MI)),
5317 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
5319 MachineRegisterInfo &RegInfo = F->getRegInfo();
5320 const TargetRegisterClass *RC =
5321 is64bit ? (const TargetRegisterClass *) &PPC::G8RCRegClass :
5322 (const TargetRegisterClass *) &PPC::GPRCRegClass;
5323 unsigned PtrReg = RegInfo.createVirtualRegister(RC);
5324 unsigned Shift1Reg = RegInfo.createVirtualRegister(RC);
5325 unsigned ShiftReg = RegInfo.createVirtualRegister(RC);
5326 unsigned NewVal2Reg = RegInfo.createVirtualRegister(RC);
5327 unsigned NewVal3Reg = RegInfo.createVirtualRegister(RC);
5328 unsigned OldVal2Reg = RegInfo.createVirtualRegister(RC);
5329 unsigned OldVal3Reg = RegInfo.createVirtualRegister(RC);
5330 unsigned MaskReg = RegInfo.createVirtualRegister(RC);
5331 unsigned Mask2Reg = RegInfo.createVirtualRegister(RC);
5332 unsigned Mask3Reg = RegInfo.createVirtualRegister(RC);
5333 unsigned Tmp2Reg = RegInfo.createVirtualRegister(RC);
5334 unsigned Tmp4Reg = RegInfo.createVirtualRegister(RC);
5335 unsigned TmpDestReg = RegInfo.createVirtualRegister(RC);
5337 unsigned TmpReg = RegInfo.createVirtualRegister(RC);
5338 unsigned ZeroReg = is64bit ? PPC::X0 : PPC::R0;
5341 // fallthrough --> loopMBB
5342 BB->addSuccessor(loop1MBB);
5344 // The 4-byte load must be aligned, while a char or short may be
5345 // anywhere in the word. Hence all this nasty bookkeeping code.
5346 // add ptr1, ptrA, ptrB [copy if ptrA==0]
5347 // rlwinm shift1, ptr1, 3, 27, 28 [3, 27, 27]
5348 // xori shift, shift1, 24 [16]
5349 // rlwinm ptr, ptr1, 0, 0, 29
5350 // slw newval2, newval, shift
5351 // slw oldval2, oldval,shift
5352 // li mask2, 255 [li mask3, 0; ori mask2, mask3, 65535]
5353 // slw mask, mask2, shift
5354 // and newval3, newval2, mask
5355 // and oldval3, oldval2, mask
5357 // lwarx tmpDest, ptr
5358 // and tmp, tmpDest, mask
5359 // cmpw tmp, oldval3
5362 // andc tmp2, tmpDest, mask
5363 // or tmp4, tmp2, newval3
5368 // stwcx. tmpDest, ptr
5370 // srw dest, tmpDest, shift
5371 if (ptrA != ZeroReg) {
5372 Ptr1Reg = RegInfo.createVirtualRegister(RC);
5373 BuildMI(BB, dl, TII->get(is64bit ? PPC::ADD8 : PPC::ADD4), Ptr1Reg)
5374 .addReg(ptrA).addReg(ptrB);
5378 BuildMI(BB, dl, TII->get(PPC::RLWINM), Shift1Reg).addReg(Ptr1Reg)
5379 .addImm(3).addImm(27).addImm(is8bit ? 28 : 27);
5380 BuildMI(BB, dl, TII->get(is64bit ? PPC::XORI8 : PPC::XORI), ShiftReg)
5381 .addReg(Shift1Reg).addImm(is8bit ? 24 : 16);
5383 BuildMI(BB, dl, TII->get(PPC::RLDICR), PtrReg)
5384 .addReg(Ptr1Reg).addImm(0).addImm(61);
5386 BuildMI(BB, dl, TII->get(PPC::RLWINM), PtrReg)
5387 .addReg(Ptr1Reg).addImm(0).addImm(0).addImm(29);
5388 BuildMI(BB, dl, TII->get(PPC::SLW), NewVal2Reg)
5389 .addReg(newval).addReg(ShiftReg);
5390 BuildMI(BB, dl, TII->get(PPC::SLW), OldVal2Reg)
5391 .addReg(oldval).addReg(ShiftReg);
5393 BuildMI(BB, dl, TII->get(PPC::LI), Mask2Reg).addImm(255);
5395 BuildMI(BB, dl, TII->get(PPC::LI), Mask3Reg).addImm(0);
5396 BuildMI(BB, dl, TII->get(PPC::ORI), Mask2Reg)
5397 .addReg(Mask3Reg).addImm(65535);
5399 BuildMI(BB, dl, TII->get(PPC::SLW), MaskReg)
5400 .addReg(Mask2Reg).addReg(ShiftReg);
5401 BuildMI(BB, dl, TII->get(PPC::AND), NewVal3Reg)
5402 .addReg(NewVal2Reg).addReg(MaskReg);
5403 BuildMI(BB, dl, TII->get(PPC::AND), OldVal3Reg)
5404 .addReg(OldVal2Reg).addReg(MaskReg);
5407 BuildMI(BB, dl, TII->get(PPC::LWARX), TmpDestReg)
5408 .addReg(ZeroReg).addReg(PtrReg);
5409 BuildMI(BB, dl, TII->get(PPC::AND),TmpReg)
5410 .addReg(TmpDestReg).addReg(MaskReg);
5411 BuildMI(BB, dl, TII->get(PPC::CMPW), PPC::CR0)
5412 .addReg(TmpReg).addReg(OldVal3Reg);
5413 BuildMI(BB, dl, TII->get(PPC::BCC))
5414 .addImm(PPC::PRED_NE).addReg(PPC::CR0).addMBB(midMBB);
5415 BB->addSuccessor(loop2MBB);
5416 BB->addSuccessor(midMBB);
5419 BuildMI(BB, dl, TII->get(PPC::ANDC),Tmp2Reg)
5420 .addReg(TmpDestReg).addReg(MaskReg);
5421 BuildMI(BB, dl, TII->get(PPC::OR),Tmp4Reg)
5422 .addReg(Tmp2Reg).addReg(NewVal3Reg);
5423 BuildMI(BB, dl, TII->get(PPC::STWCX)).addReg(Tmp4Reg)
5424 .addReg(ZeroReg).addReg(PtrReg);
5425 BuildMI(BB, dl, TII->get(PPC::BCC))
5426 .addImm(PPC::PRED_NE).addReg(PPC::CR0).addMBB(loop1MBB);
5427 BuildMI(BB, dl, TII->get(PPC::B)).addMBB(exitMBB);
5428 BB->addSuccessor(loop1MBB);
5429 BB->addSuccessor(exitMBB);
5432 BuildMI(BB, dl, TII->get(PPC::STWCX)).addReg(TmpDestReg)
5433 .addReg(ZeroReg).addReg(PtrReg);
5434 BB->addSuccessor(exitMBB);
5439 BuildMI(*BB, BB->begin(), dl, TII->get(PPC::SRW),dest).addReg(TmpReg)
5442 llvm_unreachable("Unexpected instr type to insert");
5445 MI->eraseFromParent(); // The pseudo instruction is gone now.
5449 //===----------------------------------------------------------------------===//
5450 // Target Optimization Hooks
5451 //===----------------------------------------------------------------------===//
5453 SDValue PPCTargetLowering::PerformDAGCombine(SDNode *N,
5454 DAGCombinerInfo &DCI) const {
5455 const TargetMachine &TM = getTargetMachine();
5456 SelectionDAG &DAG = DCI.DAG;
5457 DebugLoc dl = N->getDebugLoc();
5458 switch (N->getOpcode()) {
5461 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(0))) {
5462 if (C->isNullValue()) // 0 << V -> 0.
5463 return N->getOperand(0);
5467 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(0))) {
5468 if (C->isNullValue()) // 0 >>u V -> 0.
5469 return N->getOperand(0);
5473 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(0))) {
5474 if (C->isNullValue() || // 0 >>s V -> 0.
5475 C->isAllOnesValue()) // -1 >>s V -> -1.
5476 return N->getOperand(0);
5480 case ISD::SINT_TO_FP:
5481 if (TM.getSubtarget<PPCSubtarget>().has64BitSupport()) {
5482 if (N->getOperand(0).getOpcode() == ISD::FP_TO_SINT) {
5483 // Turn (sint_to_fp (fp_to_sint X)) -> fctidz/fcfid without load/stores.
5484 // We allow the src/dst to be either f32/f64, but the intermediate
5485 // type must be i64.
5486 if (N->getOperand(0).getValueType() == MVT::i64 &&
5487 N->getOperand(0).getOperand(0).getValueType() != MVT::ppcf128) {
5488 SDValue Val = N->getOperand(0).getOperand(0);
5489 if (Val.getValueType() == MVT::f32) {
5490 Val = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Val);
5491 DCI.AddToWorklist(Val.getNode());
5494 Val = DAG.getNode(PPCISD::FCTIDZ, dl, MVT::f64, Val);
5495 DCI.AddToWorklist(Val.getNode());
5496 Val = DAG.getNode(PPCISD::FCFID, dl, MVT::f64, Val);
5497 DCI.AddToWorklist(Val.getNode());
5498 if (N->getValueType(0) == MVT::f32) {
5499 Val = DAG.getNode(ISD::FP_ROUND, dl, MVT::f32, Val,
5500 DAG.getIntPtrConstant(0));
5501 DCI.AddToWorklist(Val.getNode());
5504 } else if (N->getOperand(0).getValueType() == MVT::i32) {
5505 // If the intermediate type is i32, we can avoid the load/store here
5512 // Turn STORE (FP_TO_SINT F) -> STFIWX(FCTIWZ(F)).
5513 if (TM.getSubtarget<PPCSubtarget>().hasSTFIWX() &&
5514 !cast<StoreSDNode>(N)->isTruncatingStore() &&
5515 N->getOperand(1).getOpcode() == ISD::FP_TO_SINT &&
5516 N->getOperand(1).getValueType() == MVT::i32 &&
5517 N->getOperand(1).getOperand(0).getValueType() != MVT::ppcf128) {
5518 SDValue Val = N->getOperand(1).getOperand(0);
5519 if (Val.getValueType() == MVT::f32) {
5520 Val = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Val);
5521 DCI.AddToWorklist(Val.getNode());
5523 Val = DAG.getNode(PPCISD::FCTIWZ, dl, MVT::f64, Val);
5524 DCI.AddToWorklist(Val.getNode());
5526 Val = DAG.getNode(PPCISD::STFIWX, dl, MVT::Other, N->getOperand(0), Val,
5527 N->getOperand(2), N->getOperand(3));
5528 DCI.AddToWorklist(Val.getNode());
5532 // Turn STORE (BSWAP) -> sthbrx/stwbrx.
5533 if (cast<StoreSDNode>(N)->isUnindexed() &&
5534 N->getOperand(1).getOpcode() == ISD::BSWAP &&
5535 N->getOperand(1).getNode()->hasOneUse() &&
5536 (N->getOperand(1).getValueType() == MVT::i32 ||
5537 N->getOperand(1).getValueType() == MVT::i16)) {
5538 SDValue BSwapOp = N->getOperand(1).getOperand(0);
5539 // Do an any-extend to 32-bits if this is a half-word input.
5540 if (BSwapOp.getValueType() == MVT::i16)
5541 BSwapOp = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, BSwapOp);
5544 N->getOperand(0), BSwapOp, N->getOperand(2),
5545 DAG.getValueType(N->getOperand(1).getValueType())
5548 DAG.getMemIntrinsicNode(PPCISD::STBRX, dl, DAG.getVTList(MVT::Other),
5549 Ops, array_lengthof(Ops),
5550 cast<StoreSDNode>(N)->getMemoryVT(),
5551 cast<StoreSDNode>(N)->getMemOperand());
5555 // Turn BSWAP (LOAD) -> lhbrx/lwbrx.
5556 if (ISD::isNON_EXTLoad(N->getOperand(0).getNode()) &&
5557 N->getOperand(0).hasOneUse() &&
5558 (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i16)) {
5559 SDValue Load = N->getOperand(0);
5560 LoadSDNode *LD = cast<LoadSDNode>(Load);
5561 // Create the byte-swapping load.
5563 LD->getChain(), // Chain
5564 LD->getBasePtr(), // Ptr
5565 DAG.getValueType(N->getValueType(0)) // VT
5568 DAG.getMemIntrinsicNode(PPCISD::LBRX, dl,
5569 DAG.getVTList(MVT::i32, MVT::Other), Ops, 3,
5570 LD->getMemoryVT(), LD->getMemOperand());
5572 // If this is an i16 load, insert the truncate.
5573 SDValue ResVal = BSLoad;
5574 if (N->getValueType(0) == MVT::i16)
5575 ResVal = DAG.getNode(ISD::TRUNCATE, dl, MVT::i16, BSLoad);
5577 // First, combine the bswap away. This makes the value produced by the
5579 DCI.CombineTo(N, ResVal);
5581 // Next, combine the load away, we give it a bogus result value but a real
5582 // chain result. The result value is dead because the bswap is dead.
5583 DCI.CombineTo(Load.getNode(), ResVal, BSLoad.getValue(1));
5585 // Return N so it doesn't get rechecked!
5586 return SDValue(N, 0);
5590 case PPCISD::VCMP: {
5591 // If a VCMPo node already exists with exactly the same operands as this
5592 // node, use its result instead of this node (VCMPo computes both a CR6 and
5593 // a normal output).
5595 if (!N->getOperand(0).hasOneUse() &&
5596 !N->getOperand(1).hasOneUse() &&
5597 !N->getOperand(2).hasOneUse()) {
5599 // Scan all of the users of the LHS, looking for VCMPo's that match.
5600 SDNode *VCMPoNode = 0;
5602 SDNode *LHSN = N->getOperand(0).getNode();
5603 for (SDNode::use_iterator UI = LHSN->use_begin(), E = LHSN->use_end();
5605 if (UI->getOpcode() == PPCISD::VCMPo &&
5606 UI->getOperand(1) == N->getOperand(1) &&
5607 UI->getOperand(2) == N->getOperand(2) &&
5608 UI->getOperand(0) == N->getOperand(0)) {
5613 // If there is no VCMPo node, or if the flag value has a single use, don't
5615 if (!VCMPoNode || VCMPoNode->hasNUsesOfValue(0, 1))
5618 // Look at the (necessarily single) use of the flag value. If it has a
5619 // chain, this transformation is more complex. Note that multiple things
5620 // could use the value result, which we should ignore.
5621 SDNode *FlagUser = 0;
5622 for (SDNode::use_iterator UI = VCMPoNode->use_begin();
5623 FlagUser == 0; ++UI) {
5624 assert(UI != VCMPoNode->use_end() && "Didn't find user!");
5626 for (unsigned i = 0, e = User->getNumOperands(); i != e; ++i) {
5627 if (User->getOperand(i) == SDValue(VCMPoNode, 1)) {
5634 // If the user is a MFCR instruction, we know this is safe. Otherwise we
5635 // give up for right now.
5636 if (FlagUser->getOpcode() == PPCISD::MFCR)
5637 return SDValue(VCMPoNode, 0);
5642 // If this is a branch on an altivec predicate comparison, lower this so
5643 // that we don't have to do a MFCR: instead, branch directly on CR6. This
5644 // lowering is done pre-legalize, because the legalizer lowers the predicate
5645 // compare down to code that is difficult to reassemble.
5646 ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(1))->get();
5647 SDValue LHS = N->getOperand(2), RHS = N->getOperand(3);
5651 if (LHS.getOpcode() == ISD::INTRINSIC_WO_CHAIN &&
5652 isa<ConstantSDNode>(RHS) && (CC == ISD::SETEQ || CC == ISD::SETNE) &&
5653 getAltivecCompareInfo(LHS, CompareOpc, isDot)) {
5654 assert(isDot && "Can't compare against a vector result!");
5656 // If this is a comparison against something other than 0/1, then we know
5657 // that the condition is never/always true.
5658 unsigned Val = cast<ConstantSDNode>(RHS)->getZExtValue();
5659 if (Val != 0 && Val != 1) {
5660 if (CC == ISD::SETEQ) // Cond never true, remove branch.
5661 return N->getOperand(0);
5662 // Always !=, turn it into an unconditional branch.
5663 return DAG.getNode(ISD::BR, dl, MVT::Other,
5664 N->getOperand(0), N->getOperand(4));
5667 bool BranchOnWhenPredTrue = (CC == ISD::SETEQ) ^ (Val == 0);
5669 // Create the PPCISD altivec 'dot' comparison node.
5670 std::vector<EVT> VTs;
5672 LHS.getOperand(2), // LHS of compare
5673 LHS.getOperand(3), // RHS of compare
5674 DAG.getConstant(CompareOpc, MVT::i32)
5676 VTs.push_back(LHS.getOperand(2).getValueType());
5677 VTs.push_back(MVT::Glue);
5678 SDValue CompNode = DAG.getNode(PPCISD::VCMPo, dl, VTs, Ops, 3);
5680 // Unpack the result based on how the target uses it.
5681 PPC::Predicate CompOpc;
5682 switch (cast<ConstantSDNode>(LHS.getOperand(1))->getZExtValue()) {
5683 default: // Can't happen, don't crash on invalid number though.
5684 case 0: // Branch on the value of the EQ bit of CR6.
5685 CompOpc = BranchOnWhenPredTrue ? PPC::PRED_EQ : PPC::PRED_NE;
5687 case 1: // Branch on the inverted value of the EQ bit of CR6.
5688 CompOpc = BranchOnWhenPredTrue ? PPC::PRED_NE : PPC::PRED_EQ;
5690 case 2: // Branch on the value of the LT bit of CR6.
5691 CompOpc = BranchOnWhenPredTrue ? PPC::PRED_LT : PPC::PRED_GE;
5693 case 3: // Branch on the inverted value of the LT bit of CR6.
5694 CompOpc = BranchOnWhenPredTrue ? PPC::PRED_GE : PPC::PRED_LT;
5698 return DAG.getNode(PPCISD::COND_BRANCH, dl, MVT::Other, N->getOperand(0),
5699 DAG.getConstant(CompOpc, MVT::i32),
5700 DAG.getRegister(PPC::CR6, MVT::i32),
5701 N->getOperand(4), CompNode.getValue(1));
5710 //===----------------------------------------------------------------------===//
5711 // Inline Assembly Support
5712 //===----------------------------------------------------------------------===//
5714 void PPCTargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
5717 const SelectionDAG &DAG,
5718 unsigned Depth) const {
5719 KnownZero = KnownOne = APInt(KnownZero.getBitWidth(), 0);
5720 switch (Op.getOpcode()) {
5722 case PPCISD::LBRX: {
5723 // lhbrx is known to have the top bits cleared out.
5724 if (cast<VTSDNode>(Op.getOperand(2))->getVT() == MVT::i16)
5725 KnownZero = 0xFFFF0000;
5728 case ISD::INTRINSIC_WO_CHAIN: {
5729 switch (cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue()) {
5731 case Intrinsic::ppc_altivec_vcmpbfp_p:
5732 case Intrinsic::ppc_altivec_vcmpeqfp_p:
5733 case Intrinsic::ppc_altivec_vcmpequb_p:
5734 case Intrinsic::ppc_altivec_vcmpequh_p:
5735 case Intrinsic::ppc_altivec_vcmpequw_p:
5736 case Intrinsic::ppc_altivec_vcmpgefp_p:
5737 case Intrinsic::ppc_altivec_vcmpgtfp_p:
5738 case Intrinsic::ppc_altivec_vcmpgtsb_p:
5739 case Intrinsic::ppc_altivec_vcmpgtsh_p:
5740 case Intrinsic::ppc_altivec_vcmpgtsw_p:
5741 case Intrinsic::ppc_altivec_vcmpgtub_p:
5742 case Intrinsic::ppc_altivec_vcmpgtuh_p:
5743 case Intrinsic::ppc_altivec_vcmpgtuw_p:
5744 KnownZero = ~1U; // All bits but the low one are known to be zero.
5752 /// getConstraintType - Given a constraint, return the type of
5753 /// constraint it is for this target.
5754 PPCTargetLowering::ConstraintType
5755 PPCTargetLowering::getConstraintType(const std::string &Constraint) const {
5756 if (Constraint.size() == 1) {
5757 switch (Constraint[0]) {
5764 return C_RegisterClass;
5767 return TargetLowering::getConstraintType(Constraint);
5770 /// Examine constraint type and operand type and determine a weight value.
5771 /// This object must already have been set up with the operand type
5772 /// and the current alternative constraint selected.
5773 TargetLowering::ConstraintWeight
5774 PPCTargetLowering::getSingleConstraintMatchWeight(
5775 AsmOperandInfo &info, const char *constraint) const {
5776 ConstraintWeight weight = CW_Invalid;
5777 Value *CallOperandVal = info.CallOperandVal;
5778 // If we don't have a value, we can't do a match,
5779 // but allow it at the lowest weight.
5780 if (CallOperandVal == NULL)
5782 Type *type = CallOperandVal->getType();
5783 // Look at the constraint type.
5784 switch (*constraint) {
5786 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
5789 if (type->isIntegerTy())
5790 weight = CW_Register;
5793 if (type->isFloatTy())
5794 weight = CW_Register;
5797 if (type->isDoubleTy())
5798 weight = CW_Register;
5801 if (type->isVectorTy())
5802 weight = CW_Register;
5805 weight = CW_Register;
5811 std::pair<unsigned, const TargetRegisterClass*>
5812 PPCTargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
5814 if (Constraint.size() == 1) {
5815 // GCC RS6000 Constraint Letters
5816 switch (Constraint[0]) {
5819 if (VT == MVT::i64 && PPCSubTarget.isPPC64())
5820 return std::make_pair(0U, &PPC::G8RCRegClass);
5821 return std::make_pair(0U, &PPC::GPRCRegClass);
5824 return std::make_pair(0U, &PPC::F4RCRegClass);
5826 return std::make_pair(0U, &PPC::F8RCRegClass);
5829 return std::make_pair(0U, &PPC::VRRCRegClass);
5831 return std::make_pair(0U, &PPC::CRRCRegClass);
5835 return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
5839 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
5840 /// vector. If it is invalid, don't add anything to Ops.
5841 void PPCTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
5842 std::string &Constraint,
5843 std::vector<SDValue>&Ops,
5844 SelectionDAG &DAG) const {
5845 SDValue Result(0,0);
5847 // Only support length 1 constraints.
5848 if (Constraint.length() > 1) return;
5850 char Letter = Constraint[0];
5861 ConstantSDNode *CST = dyn_cast<ConstantSDNode>(Op);
5862 if (!CST) return; // Must be an immediate to match.
5863 unsigned Value = CST->getZExtValue();
5865 default: llvm_unreachable("Unknown constraint letter!");
5866 case 'I': // "I" is a signed 16-bit constant.
5867 if ((short)Value == (int)Value)
5868 Result = DAG.getTargetConstant(Value, Op.getValueType());
5870 case 'J': // "J" is a constant with only the high-order 16 bits nonzero.
5871 case 'L': // "L" is a signed 16-bit constant shifted left 16 bits.
5872 if ((short)Value == 0)
5873 Result = DAG.getTargetConstant(Value, Op.getValueType());
5875 case 'K': // "K" is a constant with only the low-order 16 bits nonzero.
5876 if ((Value >> 16) == 0)
5877 Result = DAG.getTargetConstant(Value, Op.getValueType());
5879 case 'M': // "M" is a constant that is greater than 31.
5881 Result = DAG.getTargetConstant(Value, Op.getValueType());
5883 case 'N': // "N" is a positive constant that is an exact power of two.
5884 if ((int)Value > 0 && isPowerOf2_32(Value))
5885 Result = DAG.getTargetConstant(Value, Op.getValueType());
5887 case 'O': // "O" is the constant zero.
5889 Result = DAG.getTargetConstant(Value, Op.getValueType());
5891 case 'P': // "P" is a constant whose negation is a signed 16-bit constant.
5892 if ((short)-Value == (int)-Value)
5893 Result = DAG.getTargetConstant(Value, Op.getValueType());
5900 if (Result.getNode()) {
5901 Ops.push_back(Result);
5905 // Handle standard constraint letters.
5906 TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
5909 // isLegalAddressingMode - Return true if the addressing mode represented
5910 // by AM is legal for this target, for a load/store of the specified type.
5911 bool PPCTargetLowering::isLegalAddressingMode(const AddrMode &AM,
5913 // FIXME: PPC does not allow r+i addressing modes for vectors!
5915 // PPC allows a sign-extended 16-bit immediate field.
5916 if (AM.BaseOffs <= -(1LL << 16) || AM.BaseOffs >= (1LL << 16)-1)
5919 // No global is ever allowed as a base.
5923 // PPC only support r+r,
5925 case 0: // "r+i" or just "i", depending on HasBaseReg.
5928 if (AM.HasBaseReg && AM.BaseOffs) // "r+r+i" is not allowed.
5930 // Otherwise we have r+r or r+i.
5933 if (AM.HasBaseReg || AM.BaseOffs) // 2*r+r or 2*r+i is not allowed.
5935 // Allow 2*r as r+r.
5938 // No other scales are supported.
5945 /// isLegalAddressImmediate - Return true if the integer value can be used
5946 /// as the offset of the target addressing mode for load / store of the
5948 bool PPCTargetLowering::isLegalAddressImmediate(int64_t V,Type *Ty) const{
5949 // PPC allows a sign-extended 16-bit immediate field.
5950 return (V > -(1 << 16) && V < (1 << 16)-1);
5953 bool PPCTargetLowering::isLegalAddressImmediate(GlobalValue* GV) const {
5957 SDValue PPCTargetLowering::LowerRETURNADDR(SDValue Op,
5958 SelectionDAG &DAG) const {
5959 MachineFunction &MF = DAG.getMachineFunction();
5960 MachineFrameInfo *MFI = MF.getFrameInfo();
5961 MFI->setReturnAddressIsTaken(true);
5963 DebugLoc dl = Op.getDebugLoc();
5964 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
5966 // Make sure the function does not optimize away the store of the RA to
5968 PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
5969 FuncInfo->setLRStoreRequired();
5970 bool isPPC64 = PPCSubTarget.isPPC64();
5971 bool isDarwinABI = PPCSubTarget.isDarwinABI();
5974 SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
5977 DAG.getConstant(PPCFrameLowering::getReturnSaveOffset(isPPC64, isDarwinABI),
5978 isPPC64? MVT::i64 : MVT::i32);
5979 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
5980 DAG.getNode(ISD::ADD, dl, getPointerTy(),
5982 MachinePointerInfo(), false, false, false, 0);
5985 // Just load the return address off the stack.
5986 SDValue RetAddrFI = getReturnAddrFrameIndex(DAG);
5987 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
5988 RetAddrFI, MachinePointerInfo(), false, false, false, 0);
5991 SDValue PPCTargetLowering::LowerFRAMEADDR(SDValue Op,
5992 SelectionDAG &DAG) const {
5993 DebugLoc dl = Op.getDebugLoc();
5994 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
5996 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
5997 bool isPPC64 = PtrVT == MVT::i64;
5999 MachineFunction &MF = DAG.getMachineFunction();
6000 MachineFrameInfo *MFI = MF.getFrameInfo();
6001 MFI->setFrameAddressIsTaken(true);
6002 bool is31 = (getTargetMachine().Options.DisableFramePointerElim(MF) ||
6003 MFI->hasVarSizedObjects()) &&
6004 MFI->getStackSize() &&
6005 !MF.getFunction()->getFnAttributes().hasNakedAttr();
6006 unsigned FrameReg = isPPC64 ? (is31 ? PPC::X31 : PPC::X1) :
6007 (is31 ? PPC::R31 : PPC::R1);
6008 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg,
6011 FrameAddr = DAG.getLoad(Op.getValueType(), dl, DAG.getEntryNode(),
6012 FrameAddr, MachinePointerInfo(), false, false,
6018 PPCTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
6019 // The PowerPC target isn't yet aware of offsets.
6023 /// getOptimalMemOpType - Returns the target specific optimal type for load
6024 /// and store operations as a result of memset, memcpy, and memmove
6025 /// lowering. If DstAlign is zero that means it's safe to destination
6026 /// alignment can satisfy any constraint. Similarly if SrcAlign is zero it
6027 /// means there isn't a need to check it against alignment requirement,
6028 /// probably because the source does not need to be loaded. If
6029 /// 'IsZeroVal' is true, that means it's safe to return a
6030 /// non-scalar-integer type, e.g. empty string source, constant, or loaded
6031 /// from memory. 'MemcpyStrSrc' indicates whether the memcpy source is
6032 /// constant so it does not need to be loaded.
6033 /// It returns EVT::Other if the type should be determined using generic
6034 /// target-independent logic.
6035 EVT PPCTargetLowering::getOptimalMemOpType(uint64_t Size,
6036 unsigned DstAlign, unsigned SrcAlign,
6039 MachineFunction &MF) const {
6040 if (this->PPCSubTarget.isPPC64()) {
6047 /// isFMAFasterThanMulAndAdd - Return true if an FMA operation is faster than
6048 /// a pair of mul and add instructions. fmuladd intrinsics will be expanded to
6049 /// FMAs when this method returns true (and FMAs are legal), otherwise fmuladd
6050 /// is expanded to mul + add.
6051 bool PPCTargetLowering::isFMAFasterThanMulAndAdd(EVT VT) const {
6055 switch (VT.getSimpleVT().SimpleTy) {
6067 Sched::Preference PPCTargetLowering::getSchedulingPreference(SDNode *N) const {
6069 return TargetLowering::getSchedulingPreference(N);