1 //===-- ARMISelLowering.cpp - ARM 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 defines the interfaces that ARM uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
15 #define DEBUG_TYPE "arm-isel"
17 #include "ARMAddressingModes.h"
18 #include "ARMCallingConv.h"
19 #include "ARMConstantPoolValue.h"
20 #include "ARMISelLowering.h"
21 #include "ARMMachineFunctionInfo.h"
22 #include "ARMPerfectShuffle.h"
23 #include "ARMRegisterInfo.h"
24 #include "ARMSubtarget.h"
25 #include "ARMTargetMachine.h"
26 #include "ARMTargetObjectFile.h"
27 #include "llvm/CallingConv.h"
28 #include "llvm/Constants.h"
29 #include "llvm/Function.h"
30 #include "llvm/GlobalValue.h"
31 #include "llvm/Instruction.h"
32 #include "llvm/Instructions.h"
33 #include "llvm/Intrinsics.h"
34 #include "llvm/Type.h"
35 #include "llvm/CodeGen/CallingConvLower.h"
36 #include "llvm/CodeGen/MachineBasicBlock.h"
37 #include "llvm/CodeGen/MachineFrameInfo.h"
38 #include "llvm/CodeGen/MachineFunction.h"
39 #include "llvm/CodeGen/MachineInstrBuilder.h"
40 #include "llvm/CodeGen/MachineRegisterInfo.h"
41 #include "llvm/CodeGen/PseudoSourceValue.h"
42 #include "llvm/CodeGen/SelectionDAG.h"
43 #include "llvm/MC/MCSectionMachO.h"
44 #include "llvm/Target/TargetOptions.h"
45 #include "llvm/ADT/VectorExtras.h"
46 #include "llvm/ADT/Statistic.h"
47 #include "llvm/Support/CommandLine.h"
48 #include "llvm/Support/ErrorHandling.h"
49 #include "llvm/Support/MathExtras.h"
50 #include "llvm/Support/raw_ostream.h"
54 STATISTIC(NumTailCalls, "Number of tail calls");
56 // This option should go away when tail calls fully work.
58 EnableARMTailCalls("arm-tail-calls", cl::Hidden,
59 cl::desc("Generate tail calls (TEMPORARY OPTION)."),
63 EnableARMLongCalls("arm-long-calls", cl::Hidden,
64 cl::desc("Generate calls via indirect call instructions"),
68 ARMInterworking("arm-interworking", cl::Hidden,
69 cl::desc("Enable / disable ARM interworking (for debugging only)"),
72 void ARMTargetLowering::addTypeForNEON(EVT VT, EVT PromotedLdStVT,
73 EVT PromotedBitwiseVT) {
74 if (VT != PromotedLdStVT) {
75 setOperationAction(ISD::LOAD, VT.getSimpleVT(), Promote);
76 AddPromotedToType (ISD::LOAD, VT.getSimpleVT(),
77 PromotedLdStVT.getSimpleVT());
79 setOperationAction(ISD::STORE, VT.getSimpleVT(), Promote);
80 AddPromotedToType (ISD::STORE, VT.getSimpleVT(),
81 PromotedLdStVT.getSimpleVT());
84 EVT ElemTy = VT.getVectorElementType();
85 if (ElemTy != MVT::i64 && ElemTy != MVT::f64)
86 setOperationAction(ISD::VSETCC, VT.getSimpleVT(), Custom);
87 if (ElemTy == MVT::i8 || ElemTy == MVT::i16)
88 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT.getSimpleVT(), Custom);
89 if (ElemTy != MVT::i32) {
90 setOperationAction(ISD::SINT_TO_FP, VT.getSimpleVT(), Expand);
91 setOperationAction(ISD::UINT_TO_FP, VT.getSimpleVT(), Expand);
92 setOperationAction(ISD::FP_TO_SINT, VT.getSimpleVT(), Expand);
93 setOperationAction(ISD::FP_TO_UINT, VT.getSimpleVT(), Expand);
95 setOperationAction(ISD::BUILD_VECTOR, VT.getSimpleVT(), Custom);
96 setOperationAction(ISD::VECTOR_SHUFFLE, VT.getSimpleVT(), Custom);
97 setOperationAction(ISD::CONCAT_VECTORS, VT.getSimpleVT(), Legal);
98 setOperationAction(ISD::EXTRACT_SUBVECTOR, VT.getSimpleVT(), Expand);
99 setOperationAction(ISD::SELECT, VT.getSimpleVT(), Expand);
100 setOperationAction(ISD::SELECT_CC, VT.getSimpleVT(), Expand);
101 if (VT.isInteger()) {
102 setOperationAction(ISD::SHL, VT.getSimpleVT(), Custom);
103 setOperationAction(ISD::SRA, VT.getSimpleVT(), Custom);
104 setOperationAction(ISD::SRL, VT.getSimpleVT(), Custom);
105 setLoadExtAction(ISD::SEXTLOAD, VT.getSimpleVT(), Expand);
106 setLoadExtAction(ISD::ZEXTLOAD, VT.getSimpleVT(), Expand);
108 setLoadExtAction(ISD::EXTLOAD, VT.getSimpleVT(), Expand);
110 // Promote all bit-wise operations.
111 if (VT.isInteger() && VT != PromotedBitwiseVT) {
112 setOperationAction(ISD::AND, VT.getSimpleVT(), Promote);
113 AddPromotedToType (ISD::AND, VT.getSimpleVT(),
114 PromotedBitwiseVT.getSimpleVT());
115 setOperationAction(ISD::OR, VT.getSimpleVT(), Promote);
116 AddPromotedToType (ISD::OR, VT.getSimpleVT(),
117 PromotedBitwiseVT.getSimpleVT());
118 setOperationAction(ISD::XOR, VT.getSimpleVT(), Promote);
119 AddPromotedToType (ISD::XOR, VT.getSimpleVT(),
120 PromotedBitwiseVT.getSimpleVT());
123 // Neon does not support vector divide/remainder operations.
124 setOperationAction(ISD::SDIV, VT.getSimpleVT(), Expand);
125 setOperationAction(ISD::UDIV, VT.getSimpleVT(), Expand);
126 setOperationAction(ISD::FDIV, VT.getSimpleVT(), Expand);
127 setOperationAction(ISD::SREM, VT.getSimpleVT(), Expand);
128 setOperationAction(ISD::UREM, VT.getSimpleVT(), Expand);
129 setOperationAction(ISD::FREM, VT.getSimpleVT(), Expand);
132 void ARMTargetLowering::addDRTypeForNEON(EVT VT) {
133 addRegisterClass(VT, ARM::DPRRegisterClass);
134 addTypeForNEON(VT, MVT::f64, MVT::v2i32);
137 void ARMTargetLowering::addQRTypeForNEON(EVT VT) {
138 addRegisterClass(VT, ARM::QPRRegisterClass);
139 addTypeForNEON(VT, MVT::v2f64, MVT::v4i32);
142 static TargetLoweringObjectFile *createTLOF(TargetMachine &TM) {
143 if (TM.getSubtarget<ARMSubtarget>().isTargetDarwin())
144 return new TargetLoweringObjectFileMachO();
146 return new ARMElfTargetObjectFile();
149 ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
150 : TargetLowering(TM, createTLOF(TM)) {
151 Subtarget = &TM.getSubtarget<ARMSubtarget>();
152 RegInfo = TM.getRegisterInfo();
153 Itins = TM.getInstrItineraryData();
155 if (Subtarget->isTargetDarwin()) {
156 // Uses VFP for Thumb libfuncs if available.
157 if (Subtarget->isThumb() && Subtarget->hasVFP2()) {
158 // Single-precision floating-point arithmetic.
159 setLibcallName(RTLIB::ADD_F32, "__addsf3vfp");
160 setLibcallName(RTLIB::SUB_F32, "__subsf3vfp");
161 setLibcallName(RTLIB::MUL_F32, "__mulsf3vfp");
162 setLibcallName(RTLIB::DIV_F32, "__divsf3vfp");
164 // Double-precision floating-point arithmetic.
165 setLibcallName(RTLIB::ADD_F64, "__adddf3vfp");
166 setLibcallName(RTLIB::SUB_F64, "__subdf3vfp");
167 setLibcallName(RTLIB::MUL_F64, "__muldf3vfp");
168 setLibcallName(RTLIB::DIV_F64, "__divdf3vfp");
170 // Single-precision comparisons.
171 setLibcallName(RTLIB::OEQ_F32, "__eqsf2vfp");
172 setLibcallName(RTLIB::UNE_F32, "__nesf2vfp");
173 setLibcallName(RTLIB::OLT_F32, "__ltsf2vfp");
174 setLibcallName(RTLIB::OLE_F32, "__lesf2vfp");
175 setLibcallName(RTLIB::OGE_F32, "__gesf2vfp");
176 setLibcallName(RTLIB::OGT_F32, "__gtsf2vfp");
177 setLibcallName(RTLIB::UO_F32, "__unordsf2vfp");
178 setLibcallName(RTLIB::O_F32, "__unordsf2vfp");
180 setCmpLibcallCC(RTLIB::OEQ_F32, ISD::SETNE);
181 setCmpLibcallCC(RTLIB::UNE_F32, ISD::SETNE);
182 setCmpLibcallCC(RTLIB::OLT_F32, ISD::SETNE);
183 setCmpLibcallCC(RTLIB::OLE_F32, ISD::SETNE);
184 setCmpLibcallCC(RTLIB::OGE_F32, ISD::SETNE);
185 setCmpLibcallCC(RTLIB::OGT_F32, ISD::SETNE);
186 setCmpLibcallCC(RTLIB::UO_F32, ISD::SETNE);
187 setCmpLibcallCC(RTLIB::O_F32, ISD::SETEQ);
189 // Double-precision comparisons.
190 setLibcallName(RTLIB::OEQ_F64, "__eqdf2vfp");
191 setLibcallName(RTLIB::UNE_F64, "__nedf2vfp");
192 setLibcallName(RTLIB::OLT_F64, "__ltdf2vfp");
193 setLibcallName(RTLIB::OLE_F64, "__ledf2vfp");
194 setLibcallName(RTLIB::OGE_F64, "__gedf2vfp");
195 setLibcallName(RTLIB::OGT_F64, "__gtdf2vfp");
196 setLibcallName(RTLIB::UO_F64, "__unorddf2vfp");
197 setLibcallName(RTLIB::O_F64, "__unorddf2vfp");
199 setCmpLibcallCC(RTLIB::OEQ_F64, ISD::SETNE);
200 setCmpLibcallCC(RTLIB::UNE_F64, ISD::SETNE);
201 setCmpLibcallCC(RTLIB::OLT_F64, ISD::SETNE);
202 setCmpLibcallCC(RTLIB::OLE_F64, ISD::SETNE);
203 setCmpLibcallCC(RTLIB::OGE_F64, ISD::SETNE);
204 setCmpLibcallCC(RTLIB::OGT_F64, ISD::SETNE);
205 setCmpLibcallCC(RTLIB::UO_F64, ISD::SETNE);
206 setCmpLibcallCC(RTLIB::O_F64, ISD::SETEQ);
208 // Floating-point to integer conversions.
209 // i64 conversions are done via library routines even when generating VFP
210 // instructions, so use the same ones.
211 setLibcallName(RTLIB::FPTOSINT_F64_I32, "__fixdfsivfp");
212 setLibcallName(RTLIB::FPTOUINT_F64_I32, "__fixunsdfsivfp");
213 setLibcallName(RTLIB::FPTOSINT_F32_I32, "__fixsfsivfp");
214 setLibcallName(RTLIB::FPTOUINT_F32_I32, "__fixunssfsivfp");
216 // Conversions between floating types.
217 setLibcallName(RTLIB::FPROUND_F64_F32, "__truncdfsf2vfp");
218 setLibcallName(RTLIB::FPEXT_F32_F64, "__extendsfdf2vfp");
220 // Integer to floating-point conversions.
221 // i64 conversions are done via library routines even when generating VFP
222 // instructions, so use the same ones.
223 // FIXME: There appears to be some naming inconsistency in ARM libgcc:
224 // e.g., __floatunsidf vs. __floatunssidfvfp.
225 setLibcallName(RTLIB::SINTTOFP_I32_F64, "__floatsidfvfp");
226 setLibcallName(RTLIB::UINTTOFP_I32_F64, "__floatunssidfvfp");
227 setLibcallName(RTLIB::SINTTOFP_I32_F32, "__floatsisfvfp");
228 setLibcallName(RTLIB::UINTTOFP_I32_F32, "__floatunssisfvfp");
232 // These libcalls are not available in 32-bit.
233 setLibcallName(RTLIB::SHL_I128, 0);
234 setLibcallName(RTLIB::SRL_I128, 0);
235 setLibcallName(RTLIB::SRA_I128, 0);
237 if (Subtarget->isAAPCS_ABI()) {
238 // Double-precision floating-point arithmetic helper functions
239 // RTABI chapter 4.1.2, Table 2
240 setLibcallName(RTLIB::ADD_F64, "__aeabi_dadd");
241 setLibcallName(RTLIB::DIV_F64, "__aeabi_ddiv");
242 setLibcallName(RTLIB::MUL_F64, "__aeabi_dmul");
243 setLibcallName(RTLIB::SUB_F64, "__aeabi_dsub");
244 setLibcallCallingConv(RTLIB::ADD_F64, CallingConv::ARM_AAPCS);
245 setLibcallCallingConv(RTLIB::DIV_F64, CallingConv::ARM_AAPCS);
246 setLibcallCallingConv(RTLIB::MUL_F64, CallingConv::ARM_AAPCS);
247 setLibcallCallingConv(RTLIB::SUB_F64, CallingConv::ARM_AAPCS);
249 // Double-precision floating-point comparison helper functions
250 // RTABI chapter 4.1.2, Table 3
251 setLibcallName(RTLIB::OEQ_F64, "__aeabi_dcmpeq");
252 setCmpLibcallCC(RTLIB::OEQ_F64, ISD::SETNE);
253 setLibcallName(RTLIB::UNE_F64, "__aeabi_dcmpeq");
254 setCmpLibcallCC(RTLIB::UNE_F64, ISD::SETEQ);
255 setLibcallName(RTLIB::OLT_F64, "__aeabi_dcmplt");
256 setCmpLibcallCC(RTLIB::OLT_F64, ISD::SETNE);
257 setLibcallName(RTLIB::OLE_F64, "__aeabi_dcmple");
258 setCmpLibcallCC(RTLIB::OLE_F64, ISD::SETNE);
259 setLibcallName(RTLIB::OGE_F64, "__aeabi_dcmpge");
260 setCmpLibcallCC(RTLIB::OGE_F64, ISD::SETNE);
261 setLibcallName(RTLIB::OGT_F64, "__aeabi_dcmpgt");
262 setCmpLibcallCC(RTLIB::OGT_F64, ISD::SETNE);
263 setLibcallName(RTLIB::UO_F64, "__aeabi_dcmpun");
264 setCmpLibcallCC(RTLIB::UO_F64, ISD::SETNE);
265 setLibcallName(RTLIB::O_F64, "__aeabi_dcmpun");
266 setCmpLibcallCC(RTLIB::O_F64, ISD::SETEQ);
267 setLibcallCallingConv(RTLIB::OEQ_F64, CallingConv::ARM_AAPCS);
268 setLibcallCallingConv(RTLIB::UNE_F64, CallingConv::ARM_AAPCS);
269 setLibcallCallingConv(RTLIB::OLT_F64, CallingConv::ARM_AAPCS);
270 setLibcallCallingConv(RTLIB::OLE_F64, CallingConv::ARM_AAPCS);
271 setLibcallCallingConv(RTLIB::OGE_F64, CallingConv::ARM_AAPCS);
272 setLibcallCallingConv(RTLIB::OGT_F64, CallingConv::ARM_AAPCS);
273 setLibcallCallingConv(RTLIB::UO_F64, CallingConv::ARM_AAPCS);
274 setLibcallCallingConv(RTLIB::O_F64, CallingConv::ARM_AAPCS);
276 // Single-precision floating-point arithmetic helper functions
277 // RTABI chapter 4.1.2, Table 4
278 setLibcallName(RTLIB::ADD_F32, "__aeabi_fadd");
279 setLibcallName(RTLIB::DIV_F32, "__aeabi_fdiv");
280 setLibcallName(RTLIB::MUL_F32, "__aeabi_fmul");
281 setLibcallName(RTLIB::SUB_F32, "__aeabi_fsub");
282 setLibcallCallingConv(RTLIB::ADD_F32, CallingConv::ARM_AAPCS);
283 setLibcallCallingConv(RTLIB::DIV_F32, CallingConv::ARM_AAPCS);
284 setLibcallCallingConv(RTLIB::MUL_F32, CallingConv::ARM_AAPCS);
285 setLibcallCallingConv(RTLIB::SUB_F32, CallingConv::ARM_AAPCS);
287 // Single-precision floating-point comparison helper functions
288 // RTABI chapter 4.1.2, Table 5
289 setLibcallName(RTLIB::OEQ_F32, "__aeabi_fcmpeq");
290 setCmpLibcallCC(RTLIB::OEQ_F32, ISD::SETNE);
291 setLibcallName(RTLIB::UNE_F32, "__aeabi_fcmpeq");
292 setCmpLibcallCC(RTLIB::UNE_F32, ISD::SETEQ);
293 setLibcallName(RTLIB::OLT_F32, "__aeabi_fcmplt");
294 setCmpLibcallCC(RTLIB::OLT_F32, ISD::SETNE);
295 setLibcallName(RTLIB::OLE_F32, "__aeabi_fcmple");
296 setCmpLibcallCC(RTLIB::OLE_F32, ISD::SETNE);
297 setLibcallName(RTLIB::OGE_F32, "__aeabi_fcmpge");
298 setCmpLibcallCC(RTLIB::OGE_F32, ISD::SETNE);
299 setLibcallName(RTLIB::OGT_F32, "__aeabi_fcmpgt");
300 setCmpLibcallCC(RTLIB::OGT_F32, ISD::SETNE);
301 setLibcallName(RTLIB::UO_F32, "__aeabi_fcmpun");
302 setCmpLibcallCC(RTLIB::UO_F32, ISD::SETNE);
303 setLibcallName(RTLIB::O_F32, "__aeabi_fcmpun");
304 setCmpLibcallCC(RTLIB::O_F32, ISD::SETEQ);
305 setLibcallCallingConv(RTLIB::OEQ_F32, CallingConv::ARM_AAPCS);
306 setLibcallCallingConv(RTLIB::UNE_F32, CallingConv::ARM_AAPCS);
307 setLibcallCallingConv(RTLIB::OLT_F32, CallingConv::ARM_AAPCS);
308 setLibcallCallingConv(RTLIB::OLE_F32, CallingConv::ARM_AAPCS);
309 setLibcallCallingConv(RTLIB::OGE_F32, CallingConv::ARM_AAPCS);
310 setLibcallCallingConv(RTLIB::OGT_F32, CallingConv::ARM_AAPCS);
311 setLibcallCallingConv(RTLIB::UO_F32, CallingConv::ARM_AAPCS);
312 setLibcallCallingConv(RTLIB::O_F32, CallingConv::ARM_AAPCS);
314 // Floating-point to integer conversions.
315 // RTABI chapter 4.1.2, Table 6
316 setLibcallName(RTLIB::FPTOSINT_F64_I32, "__aeabi_d2iz");
317 setLibcallName(RTLIB::FPTOUINT_F64_I32, "__aeabi_d2uiz");
318 setLibcallName(RTLIB::FPTOSINT_F64_I64, "__aeabi_d2lz");
319 setLibcallName(RTLIB::FPTOUINT_F64_I64, "__aeabi_d2ulz");
320 setLibcallName(RTLIB::FPTOSINT_F32_I32, "__aeabi_f2iz");
321 setLibcallName(RTLIB::FPTOUINT_F32_I32, "__aeabi_f2uiz");
322 setLibcallName(RTLIB::FPTOSINT_F32_I64, "__aeabi_f2lz");
323 setLibcallName(RTLIB::FPTOUINT_F32_I64, "__aeabi_f2ulz");
324 setLibcallCallingConv(RTLIB::FPTOSINT_F64_I32, CallingConv::ARM_AAPCS);
325 setLibcallCallingConv(RTLIB::FPTOUINT_F64_I32, CallingConv::ARM_AAPCS);
326 setLibcallCallingConv(RTLIB::FPTOSINT_F64_I64, CallingConv::ARM_AAPCS);
327 setLibcallCallingConv(RTLIB::FPTOUINT_F64_I64, CallingConv::ARM_AAPCS);
328 setLibcallCallingConv(RTLIB::FPTOSINT_F32_I32, CallingConv::ARM_AAPCS);
329 setLibcallCallingConv(RTLIB::FPTOUINT_F32_I32, CallingConv::ARM_AAPCS);
330 setLibcallCallingConv(RTLIB::FPTOSINT_F32_I64, CallingConv::ARM_AAPCS);
331 setLibcallCallingConv(RTLIB::FPTOUINT_F32_I64, CallingConv::ARM_AAPCS);
333 // Conversions between floating types.
334 // RTABI chapter 4.1.2, Table 7
335 setLibcallName(RTLIB::FPROUND_F64_F32, "__aeabi_d2f");
336 setLibcallName(RTLIB::FPEXT_F32_F64, "__aeabi_f2d");
337 setLibcallCallingConv(RTLIB::FPROUND_F64_F32, CallingConv::ARM_AAPCS);
338 setLibcallCallingConv(RTLIB::FPEXT_F32_F64, CallingConv::ARM_AAPCS);
340 // Integer to floating-point conversions.
341 // RTABI chapter 4.1.2, Table 8
342 setLibcallName(RTLIB::SINTTOFP_I32_F64, "__aeabi_i2d");
343 setLibcallName(RTLIB::UINTTOFP_I32_F64, "__aeabi_ui2d");
344 setLibcallName(RTLIB::SINTTOFP_I64_F64, "__aeabi_l2d");
345 setLibcallName(RTLIB::UINTTOFP_I64_F64, "__aeabi_ul2d");
346 setLibcallName(RTLIB::SINTTOFP_I32_F32, "__aeabi_i2f");
347 setLibcallName(RTLIB::UINTTOFP_I32_F32, "__aeabi_ui2f");
348 setLibcallName(RTLIB::SINTTOFP_I64_F32, "__aeabi_l2f");
349 setLibcallName(RTLIB::UINTTOFP_I64_F32, "__aeabi_ul2f");
350 setLibcallCallingConv(RTLIB::SINTTOFP_I32_F64, CallingConv::ARM_AAPCS);
351 setLibcallCallingConv(RTLIB::UINTTOFP_I32_F64, CallingConv::ARM_AAPCS);
352 setLibcallCallingConv(RTLIB::SINTTOFP_I64_F64, CallingConv::ARM_AAPCS);
353 setLibcallCallingConv(RTLIB::UINTTOFP_I64_F64, CallingConv::ARM_AAPCS);
354 setLibcallCallingConv(RTLIB::SINTTOFP_I32_F32, CallingConv::ARM_AAPCS);
355 setLibcallCallingConv(RTLIB::UINTTOFP_I32_F32, CallingConv::ARM_AAPCS);
356 setLibcallCallingConv(RTLIB::SINTTOFP_I64_F32, CallingConv::ARM_AAPCS);
357 setLibcallCallingConv(RTLIB::UINTTOFP_I64_F32, CallingConv::ARM_AAPCS);
359 // Long long helper functions
360 // RTABI chapter 4.2, Table 9
361 setLibcallName(RTLIB::MUL_I64, "__aeabi_lmul");
362 setLibcallName(RTLIB::SDIV_I64, "__aeabi_ldivmod");
363 setLibcallName(RTLIB::UDIV_I64, "__aeabi_uldivmod");
364 setLibcallName(RTLIB::SHL_I64, "__aeabi_llsl");
365 setLibcallName(RTLIB::SRL_I64, "__aeabi_llsr");
366 setLibcallName(RTLIB::SRA_I64, "__aeabi_lasr");
367 setLibcallCallingConv(RTLIB::MUL_I64, CallingConv::ARM_AAPCS);
368 setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::ARM_AAPCS);
369 setLibcallCallingConv(RTLIB::UDIV_I64, CallingConv::ARM_AAPCS);
370 setLibcallCallingConv(RTLIB::SHL_I64, CallingConv::ARM_AAPCS);
371 setLibcallCallingConv(RTLIB::SRL_I64, CallingConv::ARM_AAPCS);
372 setLibcallCallingConv(RTLIB::SRA_I64, CallingConv::ARM_AAPCS);
374 // Integer division functions
375 // RTABI chapter 4.3.1
376 setLibcallName(RTLIB::SDIV_I8, "__aeabi_idiv");
377 setLibcallName(RTLIB::SDIV_I16, "__aeabi_idiv");
378 setLibcallName(RTLIB::SDIV_I32, "__aeabi_idiv");
379 setLibcallName(RTLIB::UDIV_I8, "__aeabi_uidiv");
380 setLibcallName(RTLIB::UDIV_I16, "__aeabi_uidiv");
381 setLibcallName(RTLIB::UDIV_I32, "__aeabi_uidiv");
382 setLibcallCallingConv(RTLIB::SDIV_I8, CallingConv::ARM_AAPCS);
383 setLibcallCallingConv(RTLIB::SDIV_I16, CallingConv::ARM_AAPCS);
384 setLibcallCallingConv(RTLIB::SDIV_I32, CallingConv::ARM_AAPCS);
385 setLibcallCallingConv(RTLIB::UDIV_I8, CallingConv::ARM_AAPCS);
386 setLibcallCallingConv(RTLIB::UDIV_I16, CallingConv::ARM_AAPCS);
387 setLibcallCallingConv(RTLIB::UDIV_I32, CallingConv::ARM_AAPCS);
390 if (Subtarget->isThumb1Only())
391 addRegisterClass(MVT::i32, ARM::tGPRRegisterClass);
393 addRegisterClass(MVT::i32, ARM::GPRRegisterClass);
394 if (!UseSoftFloat && Subtarget->hasVFP2() && !Subtarget->isThumb1Only()) {
395 addRegisterClass(MVT::f32, ARM::SPRRegisterClass);
396 if (!Subtarget->isFPOnlySP())
397 addRegisterClass(MVT::f64, ARM::DPRRegisterClass);
399 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
402 if (Subtarget->hasNEON()) {
403 addDRTypeForNEON(MVT::v2f32);
404 addDRTypeForNEON(MVT::v8i8);
405 addDRTypeForNEON(MVT::v4i16);
406 addDRTypeForNEON(MVT::v2i32);
407 addDRTypeForNEON(MVT::v1i64);
409 addQRTypeForNEON(MVT::v4f32);
410 addQRTypeForNEON(MVT::v2f64);
411 addQRTypeForNEON(MVT::v16i8);
412 addQRTypeForNEON(MVT::v8i16);
413 addQRTypeForNEON(MVT::v4i32);
414 addQRTypeForNEON(MVT::v2i64);
416 // v2f64 is legal so that QR subregs can be extracted as f64 elements, but
417 // neither Neon nor VFP support any arithmetic operations on it.
418 setOperationAction(ISD::FADD, MVT::v2f64, Expand);
419 setOperationAction(ISD::FSUB, MVT::v2f64, Expand);
420 setOperationAction(ISD::FMUL, MVT::v2f64, Expand);
421 setOperationAction(ISD::FDIV, MVT::v2f64, Expand);
422 setOperationAction(ISD::FREM, MVT::v2f64, Expand);
423 setOperationAction(ISD::FCOPYSIGN, MVT::v2f64, Expand);
424 setOperationAction(ISD::VSETCC, MVT::v2f64, Expand);
425 setOperationAction(ISD::FNEG, MVT::v2f64, Expand);
426 setOperationAction(ISD::FABS, MVT::v2f64, Expand);
427 setOperationAction(ISD::FSQRT, MVT::v2f64, Expand);
428 setOperationAction(ISD::FSIN, MVT::v2f64, Expand);
429 setOperationAction(ISD::FCOS, MVT::v2f64, Expand);
430 setOperationAction(ISD::FPOWI, MVT::v2f64, Expand);
431 setOperationAction(ISD::FPOW, MVT::v2f64, Expand);
432 setOperationAction(ISD::FLOG, MVT::v2f64, Expand);
433 setOperationAction(ISD::FLOG2, MVT::v2f64, Expand);
434 setOperationAction(ISD::FLOG10, MVT::v2f64, Expand);
435 setOperationAction(ISD::FEXP, MVT::v2f64, Expand);
436 setOperationAction(ISD::FEXP2, MVT::v2f64, Expand);
437 setOperationAction(ISD::FCEIL, MVT::v2f64, Expand);
438 setOperationAction(ISD::FTRUNC, MVT::v2f64, Expand);
439 setOperationAction(ISD::FRINT, MVT::v2f64, Expand);
440 setOperationAction(ISD::FNEARBYINT, MVT::v2f64, Expand);
441 setOperationAction(ISD::FFLOOR, MVT::v2f64, Expand);
443 setTruncStoreAction(MVT::v2f64, MVT::v2f32, Expand);
445 // Neon does not support some operations on v1i64 and v2i64 types.
446 setOperationAction(ISD::MUL, MVT::v1i64, Expand);
447 // Custom handling for some quad-vector types to detect VMULL.
448 setOperationAction(ISD::MUL, MVT::v8i16, Custom);
449 setOperationAction(ISD::MUL, MVT::v4i32, Custom);
450 setOperationAction(ISD::MUL, MVT::v2i64, Custom);
451 setOperationAction(ISD::VSETCC, MVT::v1i64, Expand);
452 setOperationAction(ISD::VSETCC, MVT::v2i64, Expand);
454 setTargetDAGCombine(ISD::INTRINSIC_WO_CHAIN);
455 setTargetDAGCombine(ISD::SHL);
456 setTargetDAGCombine(ISD::SRL);
457 setTargetDAGCombine(ISD::SRA);
458 setTargetDAGCombine(ISD::SIGN_EXTEND);
459 setTargetDAGCombine(ISD::ZERO_EXTEND);
460 setTargetDAGCombine(ISD::ANY_EXTEND);
461 setTargetDAGCombine(ISD::SELECT_CC);
462 setTargetDAGCombine(ISD::BUILD_VECTOR);
463 setTargetDAGCombine(ISD::VECTOR_SHUFFLE);
466 computeRegisterProperties();
468 // ARM does not have f32 extending load.
469 setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
471 // ARM does not have i1 sign extending load.
472 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
474 // ARM supports all 4 flavors of integer indexed load / store.
475 if (!Subtarget->isThumb1Only()) {
476 for (unsigned im = (unsigned)ISD::PRE_INC;
477 im != (unsigned)ISD::LAST_INDEXED_MODE; ++im) {
478 setIndexedLoadAction(im, MVT::i1, Legal);
479 setIndexedLoadAction(im, MVT::i8, Legal);
480 setIndexedLoadAction(im, MVT::i16, Legal);
481 setIndexedLoadAction(im, MVT::i32, Legal);
482 setIndexedStoreAction(im, MVT::i1, Legal);
483 setIndexedStoreAction(im, MVT::i8, Legal);
484 setIndexedStoreAction(im, MVT::i16, Legal);
485 setIndexedStoreAction(im, MVT::i32, Legal);
489 // i64 operation support.
490 if (Subtarget->isThumb1Only()) {
491 setOperationAction(ISD::MUL, MVT::i64, Expand);
492 setOperationAction(ISD::MULHU, MVT::i32, Expand);
493 setOperationAction(ISD::MULHS, MVT::i32, Expand);
494 setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
495 setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
497 setOperationAction(ISD::MUL, MVT::i64, Expand);
498 setOperationAction(ISD::MULHU, MVT::i32, Expand);
499 if (!Subtarget->hasV6Ops())
500 setOperationAction(ISD::MULHS, MVT::i32, Expand);
502 setOperationAction(ISD::SHL_PARTS, MVT::i32, Custom);
503 setOperationAction(ISD::SRA_PARTS, MVT::i32, Custom);
504 setOperationAction(ISD::SRL_PARTS, MVT::i32, Custom);
505 setOperationAction(ISD::SRL, MVT::i64, Custom);
506 setOperationAction(ISD::SRA, MVT::i64, Custom);
508 // ARM does not have ROTL.
509 setOperationAction(ISD::ROTL, MVT::i32, Expand);
510 setOperationAction(ISD::CTTZ, MVT::i32, Custom);
511 setOperationAction(ISD::CTPOP, MVT::i32, Expand);
512 if (!Subtarget->hasV5TOps() || Subtarget->isThumb1Only())
513 setOperationAction(ISD::CTLZ, MVT::i32, Expand);
515 // Only ARMv6 has BSWAP.
516 if (!Subtarget->hasV6Ops())
517 setOperationAction(ISD::BSWAP, MVT::i32, Expand);
519 // These are expanded into libcalls.
520 if (!Subtarget->hasDivide()) {
521 // v7M has a hardware divider
522 setOperationAction(ISD::SDIV, MVT::i32, Expand);
523 setOperationAction(ISD::UDIV, MVT::i32, Expand);
525 setOperationAction(ISD::SREM, MVT::i32, Expand);
526 setOperationAction(ISD::UREM, MVT::i32, Expand);
527 setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
528 setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
530 setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
531 setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
532 setOperationAction(ISD::GLOBAL_OFFSET_TABLE, MVT::i32, Custom);
533 setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
534 setOperationAction(ISD::BlockAddress, MVT::i32, Custom);
536 setOperationAction(ISD::TRAP, MVT::Other, Legal);
538 // Use the default implementation.
539 setOperationAction(ISD::VASTART, MVT::Other, Custom);
540 setOperationAction(ISD::VAARG, MVT::Other, Expand);
541 setOperationAction(ISD::VACOPY, MVT::Other, Expand);
542 setOperationAction(ISD::VAEND, MVT::Other, Expand);
543 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
544 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
545 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
546 // FIXME: Shouldn't need this, since no register is used, but the legalizer
547 // doesn't yet know how to not do that for SjLj.
548 setExceptionSelectorRegister(ARM::R0);
549 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand);
550 // ARMv6 Thumb1 (except for CPUs that support dmb / dsb) and earlier use
551 // the default expansion.
552 if (Subtarget->hasDataBarrier() ||
553 (Subtarget->hasV6Ops() && !Subtarget->isThumb1Only())) {
554 // membarrier needs custom lowering; the rest are legal and handled
556 setOperationAction(ISD::MEMBARRIER, MVT::Other, Custom);
558 // Set them all for expansion, which will force libcalls.
559 setOperationAction(ISD::MEMBARRIER, MVT::Other, Expand);
560 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i8, Expand);
561 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i16, Expand);
562 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i32, Expand);
563 setOperationAction(ISD::ATOMIC_SWAP, MVT::i8, Expand);
564 setOperationAction(ISD::ATOMIC_SWAP, MVT::i16, Expand);
565 setOperationAction(ISD::ATOMIC_SWAP, MVT::i32, Expand);
566 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i8, Expand);
567 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i16, Expand);
568 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i32, Expand);
569 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i8, Expand);
570 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i16, Expand);
571 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i32, Expand);
572 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i8, Expand);
573 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i16, Expand);
574 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i32, Expand);
575 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i8, Expand);
576 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i16, Expand);
577 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i32, Expand);
578 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i8, Expand);
579 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i16, Expand);
580 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i32, Expand);
581 setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i8, Expand);
582 setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i16, Expand);
583 setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i32, Expand);
584 // Since the libcalls include locking, fold in the fences
585 setShouldFoldAtomicFences(true);
587 // 64-bit versions are always libcalls (for now)
588 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i64, Expand);
589 setOperationAction(ISD::ATOMIC_SWAP, MVT::i64, Expand);
590 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i64, Expand);
591 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i64, Expand);
592 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i64, Expand);
593 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i64, Expand);
594 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i64, Expand);
595 setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i64, Expand);
597 // Requires SXTB/SXTH, available on v6 and up in both ARM and Thumb modes.
598 if (!Subtarget->hasV6Ops()) {
599 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
600 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8, Expand);
602 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
604 if (!UseSoftFloat && Subtarget->hasVFP2() && !Subtarget->isThumb1Only()) {
605 // Turn f64->i64 into VMOVRRD, i64 -> f64 to VMOVDRR
606 // iff target supports vfp2.
607 setOperationAction(ISD::BIT_CONVERT, MVT::i64, Custom);
608 setOperationAction(ISD::FLT_ROUNDS_, MVT::i32, Custom);
611 // We want to custom lower some of our intrinsics.
612 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
613 if (Subtarget->isTargetDarwin()) {
614 setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom);
615 setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom);
616 setOperationAction(ISD::EH_SJLJ_DISPATCHSETUP, MVT::Other, Custom);
619 setOperationAction(ISD::SETCC, MVT::i32, Expand);
620 setOperationAction(ISD::SETCC, MVT::f32, Expand);
621 setOperationAction(ISD::SETCC, MVT::f64, Expand);
622 setOperationAction(ISD::SELECT, MVT::i32, Custom);
623 setOperationAction(ISD::SELECT, MVT::f32, Custom);
624 setOperationAction(ISD::SELECT, MVT::f64, Custom);
625 setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
626 setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
627 setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
629 setOperationAction(ISD::BRCOND, MVT::Other, Expand);
630 setOperationAction(ISD::BR_CC, MVT::i32, Custom);
631 setOperationAction(ISD::BR_CC, MVT::f32, Custom);
632 setOperationAction(ISD::BR_CC, MVT::f64, Custom);
633 setOperationAction(ISD::BR_JT, MVT::Other, Custom);
635 // We don't support sin/cos/fmod/copysign/pow
636 setOperationAction(ISD::FSIN, MVT::f64, Expand);
637 setOperationAction(ISD::FSIN, MVT::f32, Expand);
638 setOperationAction(ISD::FCOS, MVT::f32, Expand);
639 setOperationAction(ISD::FCOS, MVT::f64, Expand);
640 setOperationAction(ISD::FREM, MVT::f64, Expand);
641 setOperationAction(ISD::FREM, MVT::f32, Expand);
642 if (!UseSoftFloat && Subtarget->hasVFP2() && !Subtarget->isThumb1Only()) {
643 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
644 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
646 setOperationAction(ISD::FPOW, MVT::f64, Expand);
647 setOperationAction(ISD::FPOW, MVT::f32, Expand);
649 // Various VFP goodness
650 if (!UseSoftFloat && !Subtarget->isThumb1Only()) {
651 // int <-> fp are custom expanded into bit_convert + ARMISD ops.
652 if (Subtarget->hasVFP2()) {
653 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
654 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Custom);
655 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom);
656 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
658 // Special handling for half-precision FP.
659 if (!Subtarget->hasFP16()) {
660 setOperationAction(ISD::FP16_TO_FP32, MVT::f32, Expand);
661 setOperationAction(ISD::FP32_TO_FP16, MVT::i32, Expand);
665 // We have target-specific dag combine patterns for the following nodes:
666 // ARMISD::VMOVRRD - No need to call setTargetDAGCombine
667 setTargetDAGCombine(ISD::ADD);
668 setTargetDAGCombine(ISD::SUB);
669 setTargetDAGCombine(ISD::MUL);
671 if (Subtarget->hasV6T2Ops())
672 setTargetDAGCombine(ISD::OR);
674 setStackPointerRegisterToSaveRestore(ARM::SP);
676 if (UseSoftFloat || Subtarget->isThumb1Only() || !Subtarget->hasVFP2())
677 setSchedulingPreference(Sched::RegPressure);
679 setSchedulingPreference(Sched::Hybrid);
681 maxStoresPerMemcpy = 1; //// temporary - rewrite interface to use type
683 // On ARM arguments smaller than 4 bytes are extended, so all arguments
684 // are at least 4 bytes aligned.
685 setMinStackArgumentAlignment(4);
687 benefitFromCodePlacementOpt = true;
690 std::pair<const TargetRegisterClass*, uint8_t>
691 ARMTargetLowering::findRepresentativeClass(EVT VT) const{
692 const TargetRegisterClass *RRC = 0;
694 switch (VT.getSimpleVT().SimpleTy) {
696 return TargetLowering::findRepresentativeClass(VT);
697 // Use DPR as representative register class for all floating point
698 // and vector types. Since there are 32 SPR registers and 32 DPR registers so
699 // the cost is 1 for both f32 and f64.
700 case MVT::f32: case MVT::f64: case MVT::v8i8: case MVT::v4i16:
701 case MVT::v2i32: case MVT::v1i64: case MVT::v2f32:
702 RRC = ARM::DPRRegisterClass;
704 case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64:
705 case MVT::v4f32: case MVT::v2f64:
706 RRC = ARM::DPRRegisterClass;
710 RRC = ARM::DPRRegisterClass;
714 RRC = ARM::DPRRegisterClass;
718 return std::make_pair(RRC, Cost);
721 const char *ARMTargetLowering::getTargetNodeName(unsigned Opcode) const {
724 case ARMISD::Wrapper: return "ARMISD::Wrapper";
725 case ARMISD::WrapperJT: return "ARMISD::WrapperJT";
726 case ARMISD::CALL: return "ARMISD::CALL";
727 case ARMISD::CALL_PRED: return "ARMISD::CALL_PRED";
728 case ARMISD::CALL_NOLINK: return "ARMISD::CALL_NOLINK";
729 case ARMISD::tCALL: return "ARMISD::tCALL";
730 case ARMISD::BRCOND: return "ARMISD::BRCOND";
731 case ARMISD::BR_JT: return "ARMISD::BR_JT";
732 case ARMISD::BR2_JT: return "ARMISD::BR2_JT";
733 case ARMISD::RET_FLAG: return "ARMISD::RET_FLAG";
734 case ARMISD::PIC_ADD: return "ARMISD::PIC_ADD";
735 case ARMISD::CMP: return "ARMISD::CMP";
736 case ARMISD::CMPZ: return "ARMISD::CMPZ";
737 case ARMISD::CMPFP: return "ARMISD::CMPFP";
738 case ARMISD::CMPFPw0: return "ARMISD::CMPFPw0";
739 case ARMISD::BCC_i64: return "ARMISD::BCC_i64";
740 case ARMISD::FMSTAT: return "ARMISD::FMSTAT";
741 case ARMISD::CMOV: return "ARMISD::CMOV";
742 case ARMISD::CNEG: return "ARMISD::CNEG";
744 case ARMISD::RBIT: return "ARMISD::RBIT";
746 case ARMISD::FTOSI: return "ARMISD::FTOSI";
747 case ARMISD::FTOUI: return "ARMISD::FTOUI";
748 case ARMISD::SITOF: return "ARMISD::SITOF";
749 case ARMISD::UITOF: return "ARMISD::UITOF";
751 case ARMISD::SRL_FLAG: return "ARMISD::SRL_FLAG";
752 case ARMISD::SRA_FLAG: return "ARMISD::SRA_FLAG";
753 case ARMISD::RRX: return "ARMISD::RRX";
755 case ARMISD::VMOVRRD: return "ARMISD::VMOVRRD";
756 case ARMISD::VMOVDRR: return "ARMISD::VMOVDRR";
758 case ARMISD::EH_SJLJ_SETJMP: return "ARMISD::EH_SJLJ_SETJMP";
759 case ARMISD::EH_SJLJ_LONGJMP:return "ARMISD::EH_SJLJ_LONGJMP";
760 case ARMISD::EH_SJLJ_DISPATCHSETUP:return "ARMISD::EH_SJLJ_DISPATCHSETUP";
762 case ARMISD::TC_RETURN: return "ARMISD::TC_RETURN";
764 case ARMISD::THREAD_POINTER:return "ARMISD::THREAD_POINTER";
766 case ARMISD::DYN_ALLOC: return "ARMISD::DYN_ALLOC";
768 case ARMISD::MEMBARRIER: return "ARMISD::MEMBARRIER";
769 case ARMISD::SYNCBARRIER: return "ARMISD::SYNCBARRIER";
771 case ARMISD::VCEQ: return "ARMISD::VCEQ";
772 case ARMISD::VCGE: return "ARMISD::VCGE";
773 case ARMISD::VCGEU: return "ARMISD::VCGEU";
774 case ARMISD::VCGT: return "ARMISD::VCGT";
775 case ARMISD::VCGTU: return "ARMISD::VCGTU";
776 case ARMISD::VTST: return "ARMISD::VTST";
778 case ARMISD::VSHL: return "ARMISD::VSHL";
779 case ARMISD::VSHRs: return "ARMISD::VSHRs";
780 case ARMISD::VSHRu: return "ARMISD::VSHRu";
781 case ARMISD::VSHLLs: return "ARMISD::VSHLLs";
782 case ARMISD::VSHLLu: return "ARMISD::VSHLLu";
783 case ARMISD::VSHLLi: return "ARMISD::VSHLLi";
784 case ARMISD::VSHRN: return "ARMISD::VSHRN";
785 case ARMISD::VRSHRs: return "ARMISD::VRSHRs";
786 case ARMISD::VRSHRu: return "ARMISD::VRSHRu";
787 case ARMISD::VRSHRN: return "ARMISD::VRSHRN";
788 case ARMISD::VQSHLs: return "ARMISD::VQSHLs";
789 case ARMISD::VQSHLu: return "ARMISD::VQSHLu";
790 case ARMISD::VQSHLsu: return "ARMISD::VQSHLsu";
791 case ARMISD::VQSHRNs: return "ARMISD::VQSHRNs";
792 case ARMISD::VQSHRNu: return "ARMISD::VQSHRNu";
793 case ARMISD::VQSHRNsu: return "ARMISD::VQSHRNsu";
794 case ARMISD::VQRSHRNs: return "ARMISD::VQRSHRNs";
795 case ARMISD::VQRSHRNu: return "ARMISD::VQRSHRNu";
796 case ARMISD::VQRSHRNsu: return "ARMISD::VQRSHRNsu";
797 case ARMISD::VGETLANEu: return "ARMISD::VGETLANEu";
798 case ARMISD::VGETLANEs: return "ARMISD::VGETLANEs";
799 case ARMISD::VMOVIMM: return "ARMISD::VMOVIMM";
800 case ARMISD::VMVNIMM: return "ARMISD::VMVNIMM";
801 case ARMISD::VDUP: return "ARMISD::VDUP";
802 case ARMISD::VDUPLANE: return "ARMISD::VDUPLANE";
803 case ARMISD::VEXT: return "ARMISD::VEXT";
804 case ARMISD::VREV64: return "ARMISD::VREV64";
805 case ARMISD::VREV32: return "ARMISD::VREV32";
806 case ARMISD::VREV16: return "ARMISD::VREV16";
807 case ARMISD::VZIP: return "ARMISD::VZIP";
808 case ARMISD::VUZP: return "ARMISD::VUZP";
809 case ARMISD::VTRN: return "ARMISD::VTRN";
810 case ARMISD::VMULLs: return "ARMISD::VMULLs";
811 case ARMISD::VMULLu: return "ARMISD::VMULLu";
812 case ARMISD::BUILD_VECTOR: return "ARMISD::BUILD_VECTOR";
813 case ARMISD::FMAX: return "ARMISD::FMAX";
814 case ARMISD::FMIN: return "ARMISD::FMIN";
815 case ARMISD::BFI: return "ARMISD::BFI";
819 /// getRegClassFor - Return the register class that should be used for the
820 /// specified value type.
821 TargetRegisterClass *ARMTargetLowering::getRegClassFor(EVT VT) const {
822 // Map v4i64 to QQ registers but do not make the type legal. Similarly map
823 // v8i64 to QQQQ registers. v4i64 and v8i64 are only used for REG_SEQUENCE to
824 // load / store 4 to 8 consecutive D registers.
825 if (Subtarget->hasNEON()) {
826 if (VT == MVT::v4i64)
827 return ARM::QQPRRegisterClass;
828 else if (VT == MVT::v8i64)
829 return ARM::QQQQPRRegisterClass;
831 return TargetLowering::getRegClassFor(VT);
834 // Create a fast isel object.
836 ARMTargetLowering::createFastISel(FunctionLoweringInfo &funcInfo) const {
837 return ARM::createFastISel(funcInfo);
840 /// getFunctionAlignment - Return the Log2 alignment of this function.
841 unsigned ARMTargetLowering::getFunctionAlignment(const Function *F) const {
842 return getTargetMachine().getSubtarget<ARMSubtarget>().isThumb() ? 1 : 2;
845 /// getMaximalGlobalOffset - Returns the maximal possible offset which can
846 /// be used for loads / stores from the global.
847 unsigned ARMTargetLowering::getMaximalGlobalOffset() const {
848 return (Subtarget->isThumb1Only() ? 127 : 4095);
851 Sched::Preference ARMTargetLowering::getSchedulingPreference(SDNode *N) const {
852 unsigned NumVals = N->getNumValues();
854 return Sched::RegPressure;
856 for (unsigned i = 0; i != NumVals; ++i) {
857 EVT VT = N->getValueType(i);
858 if (VT == MVT::Flag || VT == MVT::Other)
860 if (VT.isFloatingPoint() || VT.isVector())
861 return Sched::Latency;
864 if (!N->isMachineOpcode())
865 return Sched::RegPressure;
867 // Load are scheduled for latency even if there instruction itinerary
869 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
870 const TargetInstrDesc &TID = TII->get(N->getMachineOpcode());
872 if (TID.getNumDefs() == 0)
873 return Sched::RegPressure;
874 if (!Itins->isEmpty() &&
875 Itins->getOperandCycle(TID.getSchedClass(), 0) > 2)
876 return Sched::Latency;
878 return Sched::RegPressure;
882 ARMTargetLowering::getRegPressureLimit(const TargetRegisterClass *RC,
883 MachineFunction &MF) const {
884 switch (RC->getID()) {
887 case ARM::tGPRRegClassID:
888 return RegInfo->hasFP(MF) ? 4 : 5;
889 case ARM::GPRRegClassID: {
890 unsigned FP = RegInfo->hasFP(MF) ? 1 : 0;
891 return 10 - FP - (Subtarget->isR9Reserved() ? 1 : 0);
893 case ARM::SPRRegClassID: // Currently not used as 'rep' register class.
894 case ARM::DPRRegClassID:
899 //===----------------------------------------------------------------------===//
901 //===----------------------------------------------------------------------===//
903 /// IntCCToARMCC - Convert a DAG integer condition code to an ARM CC
904 static ARMCC::CondCodes IntCCToARMCC(ISD::CondCode CC) {
906 default: llvm_unreachable("Unknown condition code!");
907 case ISD::SETNE: return ARMCC::NE;
908 case ISD::SETEQ: return ARMCC::EQ;
909 case ISD::SETGT: return ARMCC::GT;
910 case ISD::SETGE: return ARMCC::GE;
911 case ISD::SETLT: return ARMCC::LT;
912 case ISD::SETLE: return ARMCC::LE;
913 case ISD::SETUGT: return ARMCC::HI;
914 case ISD::SETUGE: return ARMCC::HS;
915 case ISD::SETULT: return ARMCC::LO;
916 case ISD::SETULE: return ARMCC::LS;
920 /// FPCCToARMCC - Convert a DAG fp condition code to an ARM CC.
921 static void FPCCToARMCC(ISD::CondCode CC, ARMCC::CondCodes &CondCode,
922 ARMCC::CondCodes &CondCode2) {
923 CondCode2 = ARMCC::AL;
925 default: llvm_unreachable("Unknown FP condition!");
927 case ISD::SETOEQ: CondCode = ARMCC::EQ; break;
929 case ISD::SETOGT: CondCode = ARMCC::GT; break;
931 case ISD::SETOGE: CondCode = ARMCC::GE; break;
932 case ISD::SETOLT: CondCode = ARMCC::MI; break;
933 case ISD::SETOLE: CondCode = ARMCC::LS; break;
934 case ISD::SETONE: CondCode = ARMCC::MI; CondCode2 = ARMCC::GT; break;
935 case ISD::SETO: CondCode = ARMCC::VC; break;
936 case ISD::SETUO: CondCode = ARMCC::VS; break;
937 case ISD::SETUEQ: CondCode = ARMCC::EQ; CondCode2 = ARMCC::VS; break;
938 case ISD::SETUGT: CondCode = ARMCC::HI; break;
939 case ISD::SETUGE: CondCode = ARMCC::PL; break;
941 case ISD::SETULT: CondCode = ARMCC::LT; break;
943 case ISD::SETULE: CondCode = ARMCC::LE; break;
945 case ISD::SETUNE: CondCode = ARMCC::NE; break;
949 //===----------------------------------------------------------------------===//
950 // Calling Convention Implementation
951 //===----------------------------------------------------------------------===//
953 #include "ARMGenCallingConv.inc"
955 /// CCAssignFnForNode - Selects the correct CCAssignFn for a the
956 /// given CallingConvention value.
957 CCAssignFn *ARMTargetLowering::CCAssignFnForNode(CallingConv::ID CC,
959 bool isVarArg) const {
962 llvm_unreachable("Unsupported calling convention");
963 case CallingConv::Fast:
964 if (Subtarget->hasVFP2() && !isVarArg) {
965 if (!Subtarget->isAAPCS_ABI())
966 return (Return ? RetFastCC_ARM_APCS : FastCC_ARM_APCS);
967 // For AAPCS ABI targets, just use VFP variant of the calling convention.
968 return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
971 case CallingConv::C: {
972 // Use target triple & subtarget features to do actual dispatch.
973 if (!Subtarget->isAAPCS_ABI())
974 return (Return ? RetCC_ARM_APCS : CC_ARM_APCS);
975 else if (Subtarget->hasVFP2() &&
976 FloatABIType == FloatABI::Hard && !isVarArg)
977 return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
978 return (Return ? RetCC_ARM_AAPCS : CC_ARM_AAPCS);
980 case CallingConv::ARM_AAPCS_VFP:
981 return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
982 case CallingConv::ARM_AAPCS:
983 return (Return ? RetCC_ARM_AAPCS : CC_ARM_AAPCS);
984 case CallingConv::ARM_APCS:
985 return (Return ? RetCC_ARM_APCS : CC_ARM_APCS);
989 /// LowerCallResult - Lower the result values of a call into the
990 /// appropriate copies out of appropriate physical registers.
992 ARMTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
993 CallingConv::ID CallConv, bool isVarArg,
994 const SmallVectorImpl<ISD::InputArg> &Ins,
995 DebugLoc dl, SelectionDAG &DAG,
996 SmallVectorImpl<SDValue> &InVals) const {
998 // Assign locations to each value returned by this call.
999 SmallVector<CCValAssign, 16> RVLocs;
1000 CCState CCInfo(CallConv, isVarArg, getTargetMachine(),
1001 RVLocs, *DAG.getContext());
1002 CCInfo.AnalyzeCallResult(Ins,
1003 CCAssignFnForNode(CallConv, /* Return*/ true,
1006 // Copy all of the result registers out of their specified physreg.
1007 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1008 CCValAssign VA = RVLocs[i];
1011 if (VA.needsCustom()) {
1012 // Handle f64 or half of a v2f64.
1013 SDValue Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32,
1015 Chain = Lo.getValue(1);
1016 InFlag = Lo.getValue(2);
1017 VA = RVLocs[++i]; // skip ahead to next loc
1018 SDValue Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32,
1020 Chain = Hi.getValue(1);
1021 InFlag = Hi.getValue(2);
1022 Val = DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
1024 if (VA.getLocVT() == MVT::v2f64) {
1025 SDValue Vec = DAG.getNode(ISD::UNDEF, dl, MVT::v2f64);
1026 Vec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Vec, Val,
1027 DAG.getConstant(0, MVT::i32));
1029 VA = RVLocs[++i]; // skip ahead to next loc
1030 Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, InFlag);
1031 Chain = Lo.getValue(1);
1032 InFlag = Lo.getValue(2);
1033 VA = RVLocs[++i]; // skip ahead to next loc
1034 Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, InFlag);
1035 Chain = Hi.getValue(1);
1036 InFlag = Hi.getValue(2);
1037 Val = DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
1038 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Vec, Val,
1039 DAG.getConstant(1, MVT::i32));
1042 Val = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), VA.getLocVT(),
1044 Chain = Val.getValue(1);
1045 InFlag = Val.getValue(2);
1048 switch (VA.getLocInfo()) {
1049 default: llvm_unreachable("Unknown loc info!");
1050 case CCValAssign::Full: break;
1051 case CCValAssign::BCvt:
1052 Val = DAG.getNode(ISD::BIT_CONVERT, dl, VA.getValVT(), Val);
1056 InVals.push_back(Val);
1062 /// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
1063 /// by "Src" to address "Dst" of size "Size". Alignment information is
1064 /// specified by the specific parameter attribute. The copy will be passed as
1065 /// a byval function parameter.
1066 /// Sometimes what we are copying is the end of a larger object, the part that
1067 /// does not fit in registers.
1069 CreateCopyOfByValArgument(SDValue Src, SDValue Dst, SDValue Chain,
1070 ISD::ArgFlagsTy Flags, SelectionDAG &DAG,
1072 SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), MVT::i32);
1073 return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
1074 /*isVolatile=*/false, /*AlwaysInline=*/false,
1075 MachinePointerInfo(0), MachinePointerInfo(0));
1078 /// LowerMemOpCallTo - Store the argument to the stack.
1080 ARMTargetLowering::LowerMemOpCallTo(SDValue Chain,
1081 SDValue StackPtr, SDValue Arg,
1082 DebugLoc dl, SelectionDAG &DAG,
1083 const CCValAssign &VA,
1084 ISD::ArgFlagsTy Flags) const {
1085 unsigned LocMemOffset = VA.getLocMemOffset();
1086 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
1087 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
1088 if (Flags.isByVal())
1089 return CreateCopyOfByValArgument(Arg, PtrOff, Chain, Flags, DAG, dl);
1091 return DAG.getStore(Chain, dl, Arg, PtrOff,
1092 MachinePointerInfo::getStack(LocMemOffset),
1096 void ARMTargetLowering::PassF64ArgInRegs(DebugLoc dl, SelectionDAG &DAG,
1097 SDValue Chain, SDValue &Arg,
1098 RegsToPassVector &RegsToPass,
1099 CCValAssign &VA, CCValAssign &NextVA,
1101 SmallVector<SDValue, 8> &MemOpChains,
1102 ISD::ArgFlagsTy Flags) const {
1104 SDValue fmrrd = DAG.getNode(ARMISD::VMOVRRD, dl,
1105 DAG.getVTList(MVT::i32, MVT::i32), Arg);
1106 RegsToPass.push_back(std::make_pair(VA.getLocReg(), fmrrd));
1108 if (NextVA.isRegLoc())
1109 RegsToPass.push_back(std::make_pair(NextVA.getLocReg(), fmrrd.getValue(1)));
1111 assert(NextVA.isMemLoc());
1112 if (StackPtr.getNode() == 0)
1113 StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy());
1115 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, fmrrd.getValue(1),
1121 /// LowerCall - Lowering a call into a callseq_start <-
1122 /// ARMISD:CALL <- callseq_end chain. Also add input and output parameter
1125 ARMTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
1126 CallingConv::ID CallConv, bool isVarArg,
1128 const SmallVectorImpl<ISD::OutputArg> &Outs,
1129 const SmallVectorImpl<SDValue> &OutVals,
1130 const SmallVectorImpl<ISD::InputArg> &Ins,
1131 DebugLoc dl, SelectionDAG &DAG,
1132 SmallVectorImpl<SDValue> &InVals) const {
1133 MachineFunction &MF = DAG.getMachineFunction();
1134 bool IsStructRet = (Outs.empty()) ? false : Outs[0].Flags.isSRet();
1135 bool IsSibCall = false;
1136 // Temporarily disable tail calls so things don't break.
1137 if (!EnableARMTailCalls)
1140 // Check if it's really possible to do a tail call.
1141 isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv,
1142 isVarArg, IsStructRet, MF.getFunction()->hasStructRetAttr(),
1143 Outs, OutVals, Ins, DAG);
1144 // We don't support GuaranteedTailCallOpt for ARM, only automatically
1145 // detected sibcalls.
1152 // Analyze operands of the call, assigning locations to each operand.
1153 SmallVector<CCValAssign, 16> ArgLocs;
1154 CCState CCInfo(CallConv, isVarArg, getTargetMachine(), ArgLocs,
1156 CCInfo.AnalyzeCallOperands(Outs,
1157 CCAssignFnForNode(CallConv, /* Return*/ false,
1160 // Get a count of how many bytes are to be pushed on the stack.
1161 unsigned NumBytes = CCInfo.getNextStackOffset();
1163 // For tail calls, memory operands are available in our caller's stack.
1167 // Adjust the stack pointer for the new arguments...
1168 // These operations are automatically eliminated by the prolog/epilog pass
1170 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
1172 SDValue StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy());
1174 RegsToPassVector RegsToPass;
1175 SmallVector<SDValue, 8> MemOpChains;
1177 // Walk the register/memloc assignments, inserting copies/loads. In the case
1178 // of tail call optimization, arguments are handled later.
1179 for (unsigned i = 0, realArgIdx = 0, e = ArgLocs.size();
1181 ++i, ++realArgIdx) {
1182 CCValAssign &VA = ArgLocs[i];
1183 SDValue Arg = OutVals[realArgIdx];
1184 ISD::ArgFlagsTy Flags = Outs[realArgIdx].Flags;
1186 // Promote the value if needed.
1187 switch (VA.getLocInfo()) {
1188 default: llvm_unreachable("Unknown loc info!");
1189 case CCValAssign::Full: break;
1190 case CCValAssign::SExt:
1191 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), Arg);
1193 case CCValAssign::ZExt:
1194 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), Arg);
1196 case CCValAssign::AExt:
1197 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), Arg);
1199 case CCValAssign::BCvt:
1200 Arg = DAG.getNode(ISD::BIT_CONVERT, dl, VA.getLocVT(), Arg);
1204 // f64 and v2f64 might be passed in i32 pairs and must be split into pieces
1205 if (VA.needsCustom()) {
1206 if (VA.getLocVT() == MVT::v2f64) {
1207 SDValue Op0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1208 DAG.getConstant(0, MVT::i32));
1209 SDValue Op1 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1210 DAG.getConstant(1, MVT::i32));
1212 PassF64ArgInRegs(dl, DAG, Chain, Op0, RegsToPass,
1213 VA, ArgLocs[++i], StackPtr, MemOpChains, Flags);
1215 VA = ArgLocs[++i]; // skip ahead to next loc
1216 if (VA.isRegLoc()) {
1217 PassF64ArgInRegs(dl, DAG, Chain, Op1, RegsToPass,
1218 VA, ArgLocs[++i], StackPtr, MemOpChains, Flags);
1220 assert(VA.isMemLoc());
1222 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Op1,
1223 dl, DAG, VA, Flags));
1226 PassF64ArgInRegs(dl, DAG, Chain, Arg, RegsToPass, VA, ArgLocs[++i],
1227 StackPtr, MemOpChains, Flags);
1229 } else if (VA.isRegLoc()) {
1230 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
1231 } else if (!IsSibCall) {
1232 assert(VA.isMemLoc());
1234 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg,
1235 dl, DAG, VA, Flags));
1239 if (!MemOpChains.empty())
1240 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
1241 &MemOpChains[0], MemOpChains.size());
1243 // Build a sequence of copy-to-reg nodes chained together with token chain
1244 // and flag operands which copy the outgoing args into the appropriate regs.
1246 // Tail call byval lowering might overwrite argument registers so in case of
1247 // tail call optimization the copies to registers are lowered later.
1249 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
1250 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
1251 RegsToPass[i].second, InFlag);
1252 InFlag = Chain.getValue(1);
1255 // For tail calls lower the arguments to the 'real' stack slot.
1257 // Force all the incoming stack arguments to be loaded from the stack
1258 // before any new outgoing arguments are stored to the stack, because the
1259 // outgoing stack slots may alias the incoming argument stack slots, and
1260 // the alias isn't otherwise explicit. This is slightly more conservative
1261 // than necessary, because it means that each store effectively depends
1262 // on every argument instead of just those arguments it would clobber.
1264 // Do not flag preceeding copytoreg stuff together with the following stuff.
1266 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
1267 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
1268 RegsToPass[i].second, InFlag);
1269 InFlag = Chain.getValue(1);
1274 // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
1275 // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
1276 // node so that legalize doesn't hack it.
1277 bool isDirect = false;
1278 bool isARMFunc = false;
1279 bool isLocalARMFunc = false;
1280 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1282 if (EnableARMLongCalls) {
1283 assert (getTargetMachine().getRelocationModel() == Reloc::Static
1284 && "long-calls with non-static relocation model!");
1285 // Handle a global address or an external symbol. If it's not one of
1286 // those, the target's already in a register, so we don't need to do
1288 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1289 const GlobalValue *GV = G->getGlobal();
1290 // Create a constant pool entry for the callee address
1291 unsigned ARMPCLabelIndex = AFI->createConstPoolEntryUId();
1292 ARMConstantPoolValue *CPV = new ARMConstantPoolValue(GV,
1295 // Get the address of the callee into a register
1296 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1297 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1298 Callee = DAG.getLoad(getPointerTy(), dl,
1299 DAG.getEntryNode(), CPAddr,
1300 MachinePointerInfo::getConstantPool(),
1302 } else if (ExternalSymbolSDNode *S=dyn_cast<ExternalSymbolSDNode>(Callee)) {
1303 const char *Sym = S->getSymbol();
1305 // Create a constant pool entry for the callee address
1306 unsigned ARMPCLabelIndex = AFI->createConstPoolEntryUId();
1307 ARMConstantPoolValue *CPV = new ARMConstantPoolValue(*DAG.getContext(),
1308 Sym, ARMPCLabelIndex, 0);
1309 // Get the address of the callee into a register
1310 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1311 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1312 Callee = DAG.getLoad(getPointerTy(), dl,
1313 DAG.getEntryNode(), CPAddr,
1314 MachinePointerInfo::getConstantPool(),
1317 } else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1318 const GlobalValue *GV = G->getGlobal();
1320 bool isExt = GV->isDeclaration() || GV->isWeakForLinker();
1321 bool isStub = (isExt && Subtarget->isTargetDarwin()) &&
1322 getTargetMachine().getRelocationModel() != Reloc::Static;
1323 isARMFunc = !Subtarget->isThumb() || isStub;
1324 // ARM call to a local ARM function is predicable.
1325 isLocalARMFunc = !Subtarget->isThumb() && (!isExt || !ARMInterworking);
1326 // tBX takes a register source operand.
1327 if (isARMFunc && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
1328 unsigned ARMPCLabelIndex = AFI->createConstPoolEntryUId();
1329 ARMConstantPoolValue *CPV = new ARMConstantPoolValue(GV,
1332 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1333 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1334 Callee = DAG.getLoad(getPointerTy(), dl,
1335 DAG.getEntryNode(), CPAddr,
1336 MachinePointerInfo::getConstantPool(),
1338 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1339 Callee = DAG.getNode(ARMISD::PIC_ADD, dl,
1340 getPointerTy(), Callee, PICLabel);
1342 // On ELF targets for PIC code, direct calls should go through the PLT
1343 unsigned OpFlags = 0;
1344 if (Subtarget->isTargetELF() &&
1345 getTargetMachine().getRelocationModel() == Reloc::PIC_)
1346 OpFlags = ARMII::MO_PLT;
1347 Callee = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), 0, OpFlags);
1349 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
1351 bool isStub = Subtarget->isTargetDarwin() &&
1352 getTargetMachine().getRelocationModel() != Reloc::Static;
1353 isARMFunc = !Subtarget->isThumb() || isStub;
1354 // tBX takes a register source operand.
1355 const char *Sym = S->getSymbol();
1356 if (isARMFunc && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
1357 unsigned ARMPCLabelIndex = AFI->createConstPoolEntryUId();
1358 ARMConstantPoolValue *CPV = new ARMConstantPoolValue(*DAG.getContext(),
1359 Sym, ARMPCLabelIndex, 4);
1360 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1361 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1362 Callee = DAG.getLoad(getPointerTy(), dl,
1363 DAG.getEntryNode(), CPAddr,
1364 MachinePointerInfo::getConstantPool(),
1366 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1367 Callee = DAG.getNode(ARMISD::PIC_ADD, dl,
1368 getPointerTy(), Callee, PICLabel);
1370 unsigned OpFlags = 0;
1371 // On ELF targets for PIC code, direct calls should go through the PLT
1372 if (Subtarget->isTargetELF() &&
1373 getTargetMachine().getRelocationModel() == Reloc::PIC_)
1374 OpFlags = ARMII::MO_PLT;
1375 Callee = DAG.getTargetExternalSymbol(Sym, getPointerTy(), OpFlags);
1379 // FIXME: handle tail calls differently.
1381 if (Subtarget->isThumb()) {
1382 if ((!isDirect || isARMFunc) && !Subtarget->hasV5TOps())
1383 CallOpc = ARMISD::CALL_NOLINK;
1385 CallOpc = isARMFunc ? ARMISD::CALL : ARMISD::tCALL;
1387 CallOpc = (isDirect || Subtarget->hasV5TOps())
1388 ? (isLocalARMFunc ? ARMISD::CALL_PRED : ARMISD::CALL)
1389 : ARMISD::CALL_NOLINK;
1392 std::vector<SDValue> Ops;
1393 Ops.push_back(Chain);
1394 Ops.push_back(Callee);
1396 // Add argument registers to the end of the list so that they are known live
1398 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
1399 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
1400 RegsToPass[i].second.getValueType()));
1402 if (InFlag.getNode())
1403 Ops.push_back(InFlag);
1405 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
1407 return DAG.getNode(ARMISD::TC_RETURN, dl, NodeTys, &Ops[0], Ops.size());
1409 // Returns a chain and a flag for retval copy to use.
1410 Chain = DAG.getNode(CallOpc, dl, NodeTys, &Ops[0], Ops.size());
1411 InFlag = Chain.getValue(1);
1413 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
1414 DAG.getIntPtrConstant(0, true), InFlag);
1416 InFlag = Chain.getValue(1);
1418 // Handle result values, copying them out of physregs into vregs that we
1420 return LowerCallResult(Chain, InFlag, CallConv, isVarArg, Ins,
1424 /// MatchingStackOffset - Return true if the given stack call argument is
1425 /// already available in the same position (relatively) of the caller's
1426 /// incoming argument stack.
1428 bool MatchingStackOffset(SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags,
1429 MachineFrameInfo *MFI, const MachineRegisterInfo *MRI,
1430 const ARMInstrInfo *TII) {
1431 unsigned Bytes = Arg.getValueType().getSizeInBits() / 8;
1433 if (Arg.getOpcode() == ISD::CopyFromReg) {
1434 unsigned VR = cast<RegisterSDNode>(Arg.getOperand(1))->getReg();
1435 if (!VR || TargetRegisterInfo::isPhysicalRegister(VR))
1437 MachineInstr *Def = MRI->getVRegDef(VR);
1440 if (!Flags.isByVal()) {
1441 if (!TII->isLoadFromStackSlot(Def, FI))
1446 } else if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Arg)) {
1447 if (Flags.isByVal())
1448 // ByVal argument is passed in as a pointer but it's now being
1449 // dereferenced. e.g.
1450 // define @foo(%struct.X* %A) {
1451 // tail call @bar(%struct.X* byval %A)
1454 SDValue Ptr = Ld->getBasePtr();
1455 FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr);
1458 FI = FINode->getIndex();
1462 assert(FI != INT_MAX);
1463 if (!MFI->isFixedObjectIndex(FI))
1465 return Offset == MFI->getObjectOffset(FI) && Bytes == MFI->getObjectSize(FI);
1468 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
1469 /// for tail call optimization. Targets which want to do tail call
1470 /// optimization should implement this function.
1472 ARMTargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
1473 CallingConv::ID CalleeCC,
1475 bool isCalleeStructRet,
1476 bool isCallerStructRet,
1477 const SmallVectorImpl<ISD::OutputArg> &Outs,
1478 const SmallVectorImpl<SDValue> &OutVals,
1479 const SmallVectorImpl<ISD::InputArg> &Ins,
1480 SelectionDAG& DAG) const {
1481 const Function *CallerF = DAG.getMachineFunction().getFunction();
1482 CallingConv::ID CallerCC = CallerF->getCallingConv();
1483 bool CCMatch = CallerCC == CalleeCC;
1485 // Look for obvious safe cases to perform tail call optimization that do not
1486 // require ABI changes. This is what gcc calls sibcall.
1488 // Do not sibcall optimize vararg calls unless the call site is not passing
1490 if (isVarArg && !Outs.empty())
1493 // Also avoid sibcall optimization if either caller or callee uses struct
1494 // return semantics.
1495 if (isCalleeStructRet || isCallerStructRet)
1498 // FIXME: Completely disable sibcall for Thumb1 since Thumb1RegisterInfo::
1499 // emitEpilogue is not ready for them.
1500 // Doing this is tricky, since the LDM/POP instruction on Thumb doesn't take
1501 // LR. This means if we need to reload LR, it takes an extra instructions,
1502 // which outweighs the value of the tail call; but here we don't know yet
1503 // whether LR is going to be used. Probably the right approach is to
1504 // generate the tail call here and turn it back into CALL/RET in
1505 // emitEpilogue if LR is used.
1506 if (Subtarget->isThumb1Only())
1509 // For the moment, we can only do this to functions defined in this
1510 // compilation, or to indirect calls. A Thumb B to an ARM function,
1511 // or vice versa, is not easily fixed up in the linker unlike BL.
1512 // (We could do this by loading the address of the callee into a register;
1513 // that is an extra instruction over the direct call and burns a register
1514 // as well, so is not likely to be a win.)
1516 // It might be safe to remove this restriction on non-Darwin.
1518 // Thumb1 PIC calls to external symbols use BX, so they can be tail calls,
1519 // but we need to make sure there are enough registers; the only valid
1520 // registers are the 4 used for parameters. We don't currently do this
1522 if (isa<ExternalSymbolSDNode>(Callee))
1525 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1526 const GlobalValue *GV = G->getGlobal();
1527 if (GV->isDeclaration() || GV->isWeakForLinker())
1531 // If the calling conventions do not match, then we'd better make sure the
1532 // results are returned in the same way as what the caller expects.
1534 SmallVector<CCValAssign, 16> RVLocs1;
1535 CCState CCInfo1(CalleeCC, false, getTargetMachine(),
1536 RVLocs1, *DAG.getContext());
1537 CCInfo1.AnalyzeCallResult(Ins, CCAssignFnForNode(CalleeCC, true, isVarArg));
1539 SmallVector<CCValAssign, 16> RVLocs2;
1540 CCState CCInfo2(CallerCC, false, getTargetMachine(),
1541 RVLocs2, *DAG.getContext());
1542 CCInfo2.AnalyzeCallResult(Ins, CCAssignFnForNode(CallerCC, true, isVarArg));
1544 if (RVLocs1.size() != RVLocs2.size())
1546 for (unsigned i = 0, e = RVLocs1.size(); i != e; ++i) {
1547 if (RVLocs1[i].isRegLoc() != RVLocs2[i].isRegLoc())
1549 if (RVLocs1[i].getLocInfo() != RVLocs2[i].getLocInfo())
1551 if (RVLocs1[i].isRegLoc()) {
1552 if (RVLocs1[i].getLocReg() != RVLocs2[i].getLocReg())
1555 if (RVLocs1[i].getLocMemOffset() != RVLocs2[i].getLocMemOffset())
1561 // If the callee takes no arguments then go on to check the results of the
1563 if (!Outs.empty()) {
1564 // Check if stack adjustment is needed. For now, do not do this if any
1565 // argument is passed on the stack.
1566 SmallVector<CCValAssign, 16> ArgLocs;
1567 CCState CCInfo(CalleeCC, isVarArg, getTargetMachine(),
1568 ArgLocs, *DAG.getContext());
1569 CCInfo.AnalyzeCallOperands(Outs,
1570 CCAssignFnForNode(CalleeCC, false, isVarArg));
1571 if (CCInfo.getNextStackOffset()) {
1572 MachineFunction &MF = DAG.getMachineFunction();
1574 // Check if the arguments are already laid out in the right way as
1575 // the caller's fixed stack objects.
1576 MachineFrameInfo *MFI = MF.getFrameInfo();
1577 const MachineRegisterInfo *MRI = &MF.getRegInfo();
1578 const ARMInstrInfo *TII =
1579 ((ARMTargetMachine&)getTargetMachine()).getInstrInfo();
1580 for (unsigned i = 0, realArgIdx = 0, e = ArgLocs.size();
1582 ++i, ++realArgIdx) {
1583 CCValAssign &VA = ArgLocs[i];
1584 EVT RegVT = VA.getLocVT();
1585 SDValue Arg = OutVals[realArgIdx];
1586 ISD::ArgFlagsTy Flags = Outs[realArgIdx].Flags;
1587 if (VA.getLocInfo() == CCValAssign::Indirect)
1589 if (VA.needsCustom()) {
1590 // f64 and vector types are split into multiple registers or
1591 // register/stack-slot combinations. The types will not match
1592 // the registers; give up on memory f64 refs until we figure
1593 // out what to do about this.
1596 if (!ArgLocs[++i].isRegLoc())
1598 if (RegVT == MVT::v2f64) {
1599 if (!ArgLocs[++i].isRegLoc())
1601 if (!ArgLocs[++i].isRegLoc())
1604 } else if (!VA.isRegLoc()) {
1605 if (!MatchingStackOffset(Arg, VA.getLocMemOffset(), Flags,
1617 ARMTargetLowering::LowerReturn(SDValue Chain,
1618 CallingConv::ID CallConv, bool isVarArg,
1619 const SmallVectorImpl<ISD::OutputArg> &Outs,
1620 const SmallVectorImpl<SDValue> &OutVals,
1621 DebugLoc dl, SelectionDAG &DAG) const {
1623 // CCValAssign - represent the assignment of the return value to a location.
1624 SmallVector<CCValAssign, 16> RVLocs;
1626 // CCState - Info about the registers and stack slots.
1627 CCState CCInfo(CallConv, isVarArg, getTargetMachine(), RVLocs,
1630 // Analyze outgoing return values.
1631 CCInfo.AnalyzeReturn(Outs, CCAssignFnForNode(CallConv, /* Return */ true,
1634 // If this is the first return lowered for this function, add
1635 // the regs to the liveout set for the function.
1636 if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
1637 for (unsigned i = 0; i != RVLocs.size(); ++i)
1638 if (RVLocs[i].isRegLoc())
1639 DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
1644 // Copy the result values into the output registers.
1645 for (unsigned i = 0, realRVLocIdx = 0;
1647 ++i, ++realRVLocIdx) {
1648 CCValAssign &VA = RVLocs[i];
1649 assert(VA.isRegLoc() && "Can only return in registers!");
1651 SDValue Arg = OutVals[realRVLocIdx];
1653 switch (VA.getLocInfo()) {
1654 default: llvm_unreachable("Unknown loc info!");
1655 case CCValAssign::Full: break;
1656 case CCValAssign::BCvt:
1657 Arg = DAG.getNode(ISD::BIT_CONVERT, dl, VA.getLocVT(), Arg);
1661 if (VA.needsCustom()) {
1662 if (VA.getLocVT() == MVT::v2f64) {
1663 // Extract the first half and return it in two registers.
1664 SDValue Half = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1665 DAG.getConstant(0, MVT::i32));
1666 SDValue HalfGPRs = DAG.getNode(ARMISD::VMOVRRD, dl,
1667 DAG.getVTList(MVT::i32, MVT::i32), Half);
1669 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), HalfGPRs, Flag);
1670 Flag = Chain.getValue(1);
1671 VA = RVLocs[++i]; // skip ahead to next loc
1672 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
1673 HalfGPRs.getValue(1), Flag);
1674 Flag = Chain.getValue(1);
1675 VA = RVLocs[++i]; // skip ahead to next loc
1677 // Extract the 2nd half and fall through to handle it as an f64 value.
1678 Arg = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1679 DAG.getConstant(1, MVT::i32));
1681 // Legalize ret f64 -> ret 2 x i32. We always have fmrrd if f64 is
1683 SDValue fmrrd = DAG.getNode(ARMISD::VMOVRRD, dl,
1684 DAG.getVTList(MVT::i32, MVT::i32), &Arg, 1);
1685 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), fmrrd, Flag);
1686 Flag = Chain.getValue(1);
1687 VA = RVLocs[++i]; // skip ahead to next loc
1688 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), fmrrd.getValue(1),
1691 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), Arg, Flag);
1693 // Guarantee that all emitted copies are
1694 // stuck together, avoiding something bad.
1695 Flag = Chain.getValue(1);
1700 result = DAG.getNode(ARMISD::RET_FLAG, dl, MVT::Other, Chain, Flag);
1702 result = DAG.getNode(ARMISD::RET_FLAG, dl, MVT::Other, Chain);
1707 // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
1708 // their target counterpart wrapped in the ARMISD::Wrapper node. Suppose N is
1709 // one of the above mentioned nodes. It has to be wrapped because otherwise
1710 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
1711 // be used to form addressing mode. These wrapped nodes will be selected
1713 static SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) {
1714 EVT PtrVT = Op.getValueType();
1715 // FIXME there is no actual debug info here
1716 DebugLoc dl = Op.getDebugLoc();
1717 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
1719 if (CP->isMachineConstantPoolEntry())
1720 Res = DAG.getTargetConstantPool(CP->getMachineCPVal(), PtrVT,
1721 CP->getAlignment());
1723 Res = DAG.getTargetConstantPool(CP->getConstVal(), PtrVT,
1724 CP->getAlignment());
1725 return DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Res);
1728 unsigned ARMTargetLowering::getJumpTableEncoding() const {
1729 return MachineJumpTableInfo::EK_Inline;
1732 SDValue ARMTargetLowering::LowerBlockAddress(SDValue Op,
1733 SelectionDAG &DAG) const {
1734 MachineFunction &MF = DAG.getMachineFunction();
1735 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1736 unsigned ARMPCLabelIndex = 0;
1737 DebugLoc DL = Op.getDebugLoc();
1738 EVT PtrVT = getPointerTy();
1739 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
1740 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
1742 if (RelocM == Reloc::Static) {
1743 CPAddr = DAG.getTargetConstantPool(BA, PtrVT, 4);
1745 unsigned PCAdj = Subtarget->isThumb() ? 4 : 8;
1746 ARMPCLabelIndex = AFI->createConstPoolEntryUId();
1747 ARMConstantPoolValue *CPV = new ARMConstantPoolValue(BA, ARMPCLabelIndex,
1748 ARMCP::CPBlockAddress,
1750 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
1752 CPAddr = DAG.getNode(ARMISD::Wrapper, DL, PtrVT, CPAddr);
1753 SDValue Result = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(), CPAddr,
1754 MachinePointerInfo::getConstantPool(),
1756 if (RelocM == Reloc::Static)
1758 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1759 return DAG.getNode(ARMISD::PIC_ADD, DL, PtrVT, Result, PICLabel);
1762 // Lower ISD::GlobalTLSAddress using the "general dynamic" model
1764 ARMTargetLowering::LowerToTLSGeneralDynamicModel(GlobalAddressSDNode *GA,
1765 SelectionDAG &DAG) const {
1766 DebugLoc dl = GA->getDebugLoc();
1767 EVT PtrVT = getPointerTy();
1768 unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8;
1769 MachineFunction &MF = DAG.getMachineFunction();
1770 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1771 unsigned ARMPCLabelIndex = AFI->createConstPoolEntryUId();
1772 ARMConstantPoolValue *CPV =
1773 new ARMConstantPoolValue(GA->getGlobal(), ARMPCLabelIndex,
1774 ARMCP::CPValue, PCAdj, "tlsgd", true);
1775 SDValue Argument = DAG.getTargetConstantPool(CPV, PtrVT, 4);
1776 Argument = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Argument);
1777 Argument = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Argument,
1778 MachinePointerInfo::getConstantPool(),
1780 SDValue Chain = Argument.getValue(1);
1782 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1783 Argument = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Argument, PICLabel);
1785 // call __tls_get_addr.
1788 Entry.Node = Argument;
1789 Entry.Ty = (const Type *) Type::getInt32Ty(*DAG.getContext());
1790 Args.push_back(Entry);
1791 // FIXME: is there useful debug info available here?
1792 std::pair<SDValue, SDValue> CallResult =
1793 LowerCallTo(Chain, (const Type *) Type::getInt32Ty(*DAG.getContext()),
1794 false, false, false, false,
1795 0, CallingConv::C, false, /*isReturnValueUsed=*/true,
1796 DAG.getExternalSymbol("__tls_get_addr", PtrVT), Args, DAG, dl);
1797 return CallResult.first;
1800 // Lower ISD::GlobalTLSAddress using the "initial exec" or
1801 // "local exec" model.
1803 ARMTargetLowering::LowerToTLSExecModels(GlobalAddressSDNode *GA,
1804 SelectionDAG &DAG) const {
1805 const GlobalValue *GV = GA->getGlobal();
1806 DebugLoc dl = GA->getDebugLoc();
1808 SDValue Chain = DAG.getEntryNode();
1809 EVT PtrVT = getPointerTy();
1810 // Get the Thread Pointer
1811 SDValue ThreadPointer = DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT);
1813 if (GV->isDeclaration()) {
1814 MachineFunction &MF = DAG.getMachineFunction();
1815 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1816 unsigned ARMPCLabelIndex = AFI->createConstPoolEntryUId();
1817 // Initial exec model.
1818 unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8;
1819 ARMConstantPoolValue *CPV =
1820 new ARMConstantPoolValue(GA->getGlobal(), ARMPCLabelIndex,
1821 ARMCP::CPValue, PCAdj, "gottpoff", true);
1822 Offset = DAG.getTargetConstantPool(CPV, PtrVT, 4);
1823 Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset);
1824 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
1825 MachinePointerInfo::getConstantPool(),
1827 Chain = Offset.getValue(1);
1829 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1830 Offset = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Offset, PICLabel);
1832 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
1833 MachinePointerInfo::getConstantPool(),
1837 ARMConstantPoolValue *CPV = new ARMConstantPoolValue(GV, "tpoff");
1838 Offset = DAG.getTargetConstantPool(CPV, PtrVT, 4);
1839 Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset);
1840 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
1841 MachinePointerInfo::getConstantPool(),
1845 // The address of the thread local variable is the add of the thread
1846 // pointer with the offset of the variable.
1847 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
1851 ARMTargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const {
1852 // TODO: implement the "local dynamic" model
1853 assert(Subtarget->isTargetELF() &&
1854 "TLS not implemented for non-ELF targets");
1855 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
1856 // If the relocation model is PIC, use the "General Dynamic" TLS Model,
1857 // otherwise use the "Local Exec" TLS Model
1858 if (getTargetMachine().getRelocationModel() == Reloc::PIC_)
1859 return LowerToTLSGeneralDynamicModel(GA, DAG);
1861 return LowerToTLSExecModels(GA, DAG);
1864 SDValue ARMTargetLowering::LowerGlobalAddressELF(SDValue Op,
1865 SelectionDAG &DAG) const {
1866 EVT PtrVT = getPointerTy();
1867 DebugLoc dl = Op.getDebugLoc();
1868 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
1869 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
1870 if (RelocM == Reloc::PIC_) {
1871 bool UseGOTOFF = GV->hasLocalLinkage() || GV->hasHiddenVisibility();
1872 ARMConstantPoolValue *CPV =
1873 new ARMConstantPoolValue(GV, UseGOTOFF ? "GOTOFF" : "GOT");
1874 SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
1875 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1876 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
1878 MachinePointerInfo::getConstantPool(),
1880 SDValue Chain = Result.getValue(1);
1881 SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(PtrVT);
1882 Result = DAG.getNode(ISD::ADD, dl, PtrVT, Result, GOT);
1884 Result = DAG.getLoad(PtrVT, dl, Chain, Result,
1885 MachinePointerInfo::getGOT(), false, false, 0);
1888 // If we have T2 ops, we can materialize the address directly via movt/movw
1889 // pair. This is always cheaper.
1890 if (Subtarget->useMovt()) {
1891 return DAG.getNode(ARMISD::Wrapper, dl, PtrVT,
1892 DAG.getTargetGlobalAddress(GV, dl, PtrVT));
1894 SDValue CPAddr = DAG.getTargetConstantPool(GV, PtrVT, 4);
1895 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1896 return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
1897 MachinePointerInfo::getConstantPool(),
1903 SDValue ARMTargetLowering::LowerGlobalAddressDarwin(SDValue Op,
1904 SelectionDAG &DAG) const {
1905 MachineFunction &MF = DAG.getMachineFunction();
1906 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1907 unsigned ARMPCLabelIndex = 0;
1908 EVT PtrVT = getPointerTy();
1909 DebugLoc dl = Op.getDebugLoc();
1910 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
1911 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
1913 if (RelocM == Reloc::Static)
1914 CPAddr = DAG.getTargetConstantPool(GV, PtrVT, 4);
1916 ARMPCLabelIndex = AFI->createConstPoolEntryUId();
1917 unsigned PCAdj = (RelocM != Reloc::PIC_) ? 0 : (Subtarget->isThumb()?4:8);
1918 ARMConstantPoolValue *CPV =
1919 new ARMConstantPoolValue(GV, ARMPCLabelIndex, ARMCP::CPValue, PCAdj);
1920 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
1922 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1924 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
1925 MachinePointerInfo::getConstantPool(),
1927 SDValue Chain = Result.getValue(1);
1929 if (RelocM == Reloc::PIC_) {
1930 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1931 Result = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
1934 if (Subtarget->GVIsIndirectSymbol(GV, RelocM))
1935 Result = DAG.getLoad(PtrVT, dl, Chain, Result, MachinePointerInfo::getGOT(),
1941 SDValue ARMTargetLowering::LowerGLOBAL_OFFSET_TABLE(SDValue Op,
1942 SelectionDAG &DAG) const {
1943 assert(Subtarget->isTargetELF() &&
1944 "GLOBAL OFFSET TABLE not implemented for non-ELF targets");
1945 MachineFunction &MF = DAG.getMachineFunction();
1946 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1947 unsigned ARMPCLabelIndex = AFI->createConstPoolEntryUId();
1948 EVT PtrVT = getPointerTy();
1949 DebugLoc dl = Op.getDebugLoc();
1950 unsigned PCAdj = Subtarget->isThumb() ? 4 : 8;
1951 ARMConstantPoolValue *CPV = new ARMConstantPoolValue(*DAG.getContext(),
1952 "_GLOBAL_OFFSET_TABLE_",
1953 ARMPCLabelIndex, PCAdj);
1954 SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
1955 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1956 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
1957 MachinePointerInfo::getConstantPool(),
1959 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1960 return DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
1964 ARMTargetLowering::LowerEH_SJLJ_DISPATCHSETUP(SDValue Op, SelectionDAG &DAG)
1966 DebugLoc dl = Op.getDebugLoc();
1967 return DAG.getNode(ARMISD::EH_SJLJ_DISPATCHSETUP, dl, MVT::Other,
1968 Op.getOperand(0), Op.getOperand(1));
1972 ARMTargetLowering::LowerEH_SJLJ_SETJMP(SDValue Op, SelectionDAG &DAG) const {
1973 DebugLoc dl = Op.getDebugLoc();
1974 SDValue Val = DAG.getConstant(0, MVT::i32);
1975 return DAG.getNode(ARMISD::EH_SJLJ_SETJMP, dl, MVT::i32, Op.getOperand(0),
1976 Op.getOperand(1), Val);
1980 ARMTargetLowering::LowerEH_SJLJ_LONGJMP(SDValue Op, SelectionDAG &DAG) const {
1981 DebugLoc dl = Op.getDebugLoc();
1982 return DAG.getNode(ARMISD::EH_SJLJ_LONGJMP, dl, MVT::Other, Op.getOperand(0),
1983 Op.getOperand(1), DAG.getConstant(0, MVT::i32));
1987 ARMTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG,
1988 const ARMSubtarget *Subtarget) const {
1989 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
1990 DebugLoc dl = Op.getDebugLoc();
1992 default: return SDValue(); // Don't custom lower most intrinsics.
1993 case Intrinsic::arm_thread_pointer: {
1994 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1995 return DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT);
1997 case Intrinsic::eh_sjlj_lsda: {
1998 MachineFunction &MF = DAG.getMachineFunction();
1999 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2000 unsigned ARMPCLabelIndex = AFI->createConstPoolEntryUId();
2001 EVT PtrVT = getPointerTy();
2002 DebugLoc dl = Op.getDebugLoc();
2003 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2005 unsigned PCAdj = (RelocM != Reloc::PIC_)
2006 ? 0 : (Subtarget->isThumb() ? 4 : 8);
2007 ARMConstantPoolValue *CPV =
2008 new ARMConstantPoolValue(MF.getFunction(), ARMPCLabelIndex,
2009 ARMCP::CPLSDA, PCAdj);
2010 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2011 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2013 DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2014 MachinePointerInfo::getConstantPool(),
2017 if (RelocM == Reloc::PIC_) {
2018 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2019 Result = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
2026 static SDValue LowerMEMBARRIER(SDValue Op, SelectionDAG &DAG,
2027 const ARMSubtarget *Subtarget) {
2028 DebugLoc dl = Op.getDebugLoc();
2029 SDValue Op5 = Op.getOperand(5);
2030 unsigned isDeviceBarrier = cast<ConstantSDNode>(Op5)->getZExtValue();
2031 // Some subtargets which have dmb and dsb instructions can handle barriers
2032 // directly. Some ARMv6 cpus can support them with the help of mcr
2033 // instruction. Thumb1 and pre-v6 ARM mode use a libcall instead and should
2035 unsigned Opc = isDeviceBarrier ? ARMISD::SYNCBARRIER : ARMISD::MEMBARRIER;
2036 if (Subtarget->hasDataBarrier())
2037 return DAG.getNode(Opc, dl, MVT::Other, Op.getOperand(0));
2039 assert(Subtarget->hasV6Ops() && !Subtarget->isThumb1Only() &&
2040 "Unexpected ISD::MEMBARRIER encountered. Should be libcall!");
2041 return DAG.getNode(Opc, dl, MVT::Other, Op.getOperand(0),
2042 DAG.getConstant(0, MVT::i32));
2046 static SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) {
2047 MachineFunction &MF = DAG.getMachineFunction();
2048 ARMFunctionInfo *FuncInfo = MF.getInfo<ARMFunctionInfo>();
2050 // vastart just stores the address of the VarArgsFrameIndex slot into the
2051 // memory location argument.
2052 DebugLoc dl = Op.getDebugLoc();
2053 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2054 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);
2055 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
2056 return DAG.getStore(Op.getOperand(0), dl, FR, Op.getOperand(1),
2057 MachinePointerInfo(SV), false, false, 0);
2061 ARMTargetLowering::GetF64FormalArgument(CCValAssign &VA, CCValAssign &NextVA,
2062 SDValue &Root, SelectionDAG &DAG,
2063 DebugLoc dl) const {
2064 MachineFunction &MF = DAG.getMachineFunction();
2065 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2067 TargetRegisterClass *RC;
2068 if (AFI->isThumb1OnlyFunction())
2069 RC = ARM::tGPRRegisterClass;
2071 RC = ARM::GPRRegisterClass;
2073 // Transform the arguments stored in physical registers into virtual ones.
2074 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
2075 SDValue ArgValue = DAG.getCopyFromReg(Root, dl, Reg, MVT::i32);
2078 if (NextVA.isMemLoc()) {
2079 MachineFrameInfo *MFI = MF.getFrameInfo();
2080 int FI = MFI->CreateFixedObject(4, NextVA.getLocMemOffset(), true);
2082 // Create load node to retrieve arguments from the stack.
2083 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2084 ArgValue2 = DAG.getLoad(MVT::i32, dl, Root, FIN,
2085 MachinePointerInfo::getFixedStack(FI),
2088 Reg = MF.addLiveIn(NextVA.getLocReg(), RC);
2089 ArgValue2 = DAG.getCopyFromReg(Root, dl, Reg, MVT::i32);
2092 return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, ArgValue, ArgValue2);
2096 ARMTargetLowering::LowerFormalArguments(SDValue Chain,
2097 CallingConv::ID CallConv, bool isVarArg,
2098 const SmallVectorImpl<ISD::InputArg>
2100 DebugLoc dl, SelectionDAG &DAG,
2101 SmallVectorImpl<SDValue> &InVals)
2104 MachineFunction &MF = DAG.getMachineFunction();
2105 MachineFrameInfo *MFI = MF.getFrameInfo();
2107 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2109 // Assign locations to all of the incoming arguments.
2110 SmallVector<CCValAssign, 16> ArgLocs;
2111 CCState CCInfo(CallConv, isVarArg, getTargetMachine(), ArgLocs,
2113 CCInfo.AnalyzeFormalArguments(Ins,
2114 CCAssignFnForNode(CallConv, /* Return*/ false,
2117 SmallVector<SDValue, 16> ArgValues;
2119 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2120 CCValAssign &VA = ArgLocs[i];
2122 // Arguments stored in registers.
2123 if (VA.isRegLoc()) {
2124 EVT RegVT = VA.getLocVT();
2127 if (VA.needsCustom()) {
2128 // f64 and vector types are split up into multiple registers or
2129 // combinations of registers and stack slots.
2130 if (VA.getLocVT() == MVT::v2f64) {
2131 SDValue ArgValue1 = GetF64FormalArgument(VA, ArgLocs[++i],
2133 VA = ArgLocs[++i]; // skip ahead to next loc
2135 if (VA.isMemLoc()) {
2136 int FI = MFI->CreateFixedObject(8, VA.getLocMemOffset(), true);
2137 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2138 ArgValue2 = DAG.getLoad(MVT::f64, dl, Chain, FIN,
2139 MachinePointerInfo::getFixedStack(FI),
2142 ArgValue2 = GetF64FormalArgument(VA, ArgLocs[++i],
2145 ArgValue = DAG.getNode(ISD::UNDEF, dl, MVT::v2f64);
2146 ArgValue = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64,
2147 ArgValue, ArgValue1, DAG.getIntPtrConstant(0));
2148 ArgValue = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64,
2149 ArgValue, ArgValue2, DAG.getIntPtrConstant(1));
2151 ArgValue = GetF64FormalArgument(VA, ArgLocs[++i], Chain, DAG, dl);
2154 TargetRegisterClass *RC;
2156 if (RegVT == MVT::f32)
2157 RC = ARM::SPRRegisterClass;
2158 else if (RegVT == MVT::f64)
2159 RC = ARM::DPRRegisterClass;
2160 else if (RegVT == MVT::v2f64)
2161 RC = ARM::QPRRegisterClass;
2162 else if (RegVT == MVT::i32)
2163 RC = (AFI->isThumb1OnlyFunction() ?
2164 ARM::tGPRRegisterClass : ARM::GPRRegisterClass);
2166 llvm_unreachable("RegVT not supported by FORMAL_ARGUMENTS Lowering");
2168 // Transform the arguments in physical registers into virtual ones.
2169 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
2170 ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
2173 // If this is an 8 or 16-bit value, it is really passed promoted
2174 // to 32 bits. Insert an assert[sz]ext to capture this, then
2175 // truncate to the right size.
2176 switch (VA.getLocInfo()) {
2177 default: llvm_unreachable("Unknown loc info!");
2178 case CCValAssign::Full: break;
2179 case CCValAssign::BCvt:
2180 ArgValue = DAG.getNode(ISD::BIT_CONVERT, dl, VA.getValVT(), ArgValue);
2182 case CCValAssign::SExt:
2183 ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue,
2184 DAG.getValueType(VA.getValVT()));
2185 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
2187 case CCValAssign::ZExt:
2188 ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue,
2189 DAG.getValueType(VA.getValVT()));
2190 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
2194 InVals.push_back(ArgValue);
2196 } else { // VA.isRegLoc()
2199 assert(VA.isMemLoc());
2200 assert(VA.getValVT() != MVT::i64 && "i64 should already be lowered");
2202 unsigned ArgSize = VA.getLocVT().getSizeInBits()/8;
2203 int FI = MFI->CreateFixedObject(ArgSize, VA.getLocMemOffset(), true);
2205 // Create load nodes to retrieve arguments from the stack.
2206 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2207 InVals.push_back(DAG.getLoad(VA.getValVT(), dl, Chain, FIN,
2208 MachinePointerInfo::getFixedStack(FI),
2215 static const unsigned GPRArgRegs[] = {
2216 ARM::R0, ARM::R1, ARM::R2, ARM::R3
2219 unsigned NumGPRs = CCInfo.getFirstUnallocated
2220 (GPRArgRegs, sizeof(GPRArgRegs) / sizeof(GPRArgRegs[0]));
2222 unsigned Align = MF.getTarget().getFrameInfo()->getStackAlignment();
2223 unsigned VARegSize = (4 - NumGPRs) * 4;
2224 unsigned VARegSaveSize = (VARegSize + Align - 1) & ~(Align - 1);
2225 unsigned ArgOffset = CCInfo.getNextStackOffset();
2226 if (VARegSaveSize) {
2227 // If this function is vararg, store any remaining integer argument regs
2228 // to their spots on the stack so that they may be loaded by deferencing
2229 // the result of va_next.
2230 AFI->setVarArgsRegSaveSize(VARegSaveSize);
2231 AFI->setVarArgsFrameIndex(
2232 MFI->CreateFixedObject(VARegSaveSize,
2233 ArgOffset + VARegSaveSize - VARegSize,
2235 SDValue FIN = DAG.getFrameIndex(AFI->getVarArgsFrameIndex(),
2238 SmallVector<SDValue, 4> MemOps;
2239 for (; NumGPRs < 4; ++NumGPRs) {
2240 TargetRegisterClass *RC;
2241 if (AFI->isThumb1OnlyFunction())
2242 RC = ARM::tGPRRegisterClass;
2244 RC = ARM::GPRRegisterClass;
2246 unsigned VReg = MF.addLiveIn(GPRArgRegs[NumGPRs], RC);
2247 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i32);
2249 DAG.getStore(Val.getValue(1), dl, Val, FIN,
2250 MachinePointerInfo::getFixedStack(AFI->getVarArgsFrameIndex()),
2252 MemOps.push_back(Store);
2253 FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), FIN,
2254 DAG.getConstant(4, getPointerTy()));
2256 if (!MemOps.empty())
2257 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2258 &MemOps[0], MemOps.size());
2260 // This will point to the next argument passed via stack.
2261 AFI->setVarArgsFrameIndex(MFI->CreateFixedObject(4, ArgOffset, true));
2267 /// isFloatingPointZero - Return true if this is +0.0.
2268 static bool isFloatingPointZero(SDValue Op) {
2269 if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Op))
2270 return CFP->getValueAPF().isPosZero();
2271 else if (ISD::isEXTLoad(Op.getNode()) || ISD::isNON_EXTLoad(Op.getNode())) {
2272 // Maybe this has already been legalized into the constant pool?
2273 if (Op.getOperand(1).getOpcode() == ARMISD::Wrapper) {
2274 SDValue WrapperOp = Op.getOperand(1).getOperand(0);
2275 if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(WrapperOp))
2276 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CP->getConstVal()))
2277 return CFP->getValueAPF().isPosZero();
2283 /// Returns appropriate ARM CMP (cmp) and corresponding condition code for
2284 /// the given operands.
2286 ARMTargetLowering::getARMCmp(SDValue LHS, SDValue RHS, ISD::CondCode CC,
2287 SDValue &ARMcc, SelectionDAG &DAG,
2288 DebugLoc dl) const {
2289 if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS.getNode())) {
2290 unsigned C = RHSC->getZExtValue();
2291 if (!isLegalICmpImmediate(C)) {
2292 // Constant does not fit, try adjusting it by one?
2297 if (C != 0x80000000 && isLegalICmpImmediate(C-1)) {
2298 CC = (CC == ISD::SETLT) ? ISD::SETLE : ISD::SETGT;
2299 RHS = DAG.getConstant(C-1, MVT::i32);
2304 if (C != 0 && isLegalICmpImmediate(C-1)) {
2305 CC = (CC == ISD::SETULT) ? ISD::SETULE : ISD::SETUGT;
2306 RHS = DAG.getConstant(C-1, MVT::i32);
2311 if (C != 0x7fffffff && isLegalICmpImmediate(C+1)) {
2312 CC = (CC == ISD::SETLE) ? ISD::SETLT : ISD::SETGE;
2313 RHS = DAG.getConstant(C+1, MVT::i32);
2318 if (C != 0xffffffff && isLegalICmpImmediate(C+1)) {
2319 CC = (CC == ISD::SETULE) ? ISD::SETULT : ISD::SETUGE;
2320 RHS = DAG.getConstant(C+1, MVT::i32);
2327 ARMCC::CondCodes CondCode = IntCCToARMCC(CC);
2328 ARMISD::NodeType CompareType;
2331 CompareType = ARMISD::CMP;
2336 CompareType = ARMISD::CMPZ;
2339 ARMcc = DAG.getConstant(CondCode, MVT::i32);
2340 return DAG.getNode(CompareType, dl, MVT::Flag, LHS, RHS);
2343 /// Returns a appropriate VFP CMP (fcmp{s|d}+fmstat) for the given operands.
2345 ARMTargetLowering::getVFPCmp(SDValue LHS, SDValue RHS, SelectionDAG &DAG,
2346 DebugLoc dl) const {
2348 if (!isFloatingPointZero(RHS))
2349 Cmp = DAG.getNode(ARMISD::CMPFP, dl, MVT::Flag, LHS, RHS);
2351 Cmp = DAG.getNode(ARMISD::CMPFPw0, dl, MVT::Flag, LHS);
2352 return DAG.getNode(ARMISD::FMSTAT, dl, MVT::Flag, Cmp);
2355 SDValue ARMTargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
2356 SDValue Cond = Op.getOperand(0);
2357 SDValue SelectTrue = Op.getOperand(1);
2358 SDValue SelectFalse = Op.getOperand(2);
2359 DebugLoc dl = Op.getDebugLoc();
2363 // (select (cmov 1, 0, cond), t, f) -> (cmov t, f, cond)
2364 // (select (cmov 0, 1, cond), t, f) -> (cmov f, t, cond)
2366 if (Cond.getOpcode() == ARMISD::CMOV && Cond.hasOneUse()) {
2367 const ConstantSDNode *CMOVTrue =
2368 dyn_cast<ConstantSDNode>(Cond.getOperand(0));
2369 const ConstantSDNode *CMOVFalse =
2370 dyn_cast<ConstantSDNode>(Cond.getOperand(1));
2372 if (CMOVTrue && CMOVFalse) {
2373 unsigned CMOVTrueVal = CMOVTrue->getZExtValue();
2374 unsigned CMOVFalseVal = CMOVFalse->getZExtValue();
2378 if (CMOVTrueVal == 1 && CMOVFalseVal == 0) {
2380 False = SelectFalse;
2381 } else if (CMOVTrueVal == 0 && CMOVFalseVal == 1) {
2386 if (True.getNode() && False.getNode()) {
2387 EVT VT = Cond.getValueType();
2388 SDValue ARMcc = Cond.getOperand(2);
2389 SDValue CCR = Cond.getOperand(3);
2390 SDValue Cmp = Cond.getOperand(4);
2391 return DAG.getNode(ARMISD::CMOV, dl, VT, True, False, ARMcc, CCR, Cmp);
2396 return DAG.getSelectCC(dl, Cond,
2397 DAG.getConstant(0, Cond.getValueType()),
2398 SelectTrue, SelectFalse, ISD::SETNE);
2401 SDValue ARMTargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const {
2402 EVT VT = Op.getValueType();
2403 SDValue LHS = Op.getOperand(0);
2404 SDValue RHS = Op.getOperand(1);
2405 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
2406 SDValue TrueVal = Op.getOperand(2);
2407 SDValue FalseVal = Op.getOperand(3);
2408 DebugLoc dl = Op.getDebugLoc();
2410 if (LHS.getValueType() == MVT::i32) {
2412 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2413 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
2414 return DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal, ARMcc, CCR,Cmp);
2417 ARMCC::CondCodes CondCode, CondCode2;
2418 FPCCToARMCC(CC, CondCode, CondCode2);
2420 SDValue ARMcc = DAG.getConstant(CondCode, MVT::i32);
2421 SDValue Cmp = getVFPCmp(LHS, RHS, DAG, dl);
2422 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2423 SDValue Result = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal,
2425 if (CondCode2 != ARMCC::AL) {
2426 SDValue ARMcc2 = DAG.getConstant(CondCode2, MVT::i32);
2427 // FIXME: Needs another CMP because flag can have but one use.
2428 SDValue Cmp2 = getVFPCmp(LHS, RHS, DAG, dl);
2429 Result = DAG.getNode(ARMISD::CMOV, dl, VT,
2430 Result, TrueVal, ARMcc2, CCR, Cmp2);
2435 /// canChangeToInt - Given the fp compare operand, return true if it is suitable
2436 /// to morph to an integer compare sequence.
2437 static bool canChangeToInt(SDValue Op, bool &SeenZero,
2438 const ARMSubtarget *Subtarget) {
2439 SDNode *N = Op.getNode();
2440 if (!N->hasOneUse())
2441 // Otherwise it requires moving the value from fp to integer registers.
2443 if (!N->getNumValues())
2445 EVT VT = Op.getValueType();
2446 if (VT != MVT::f32 && !Subtarget->isFPBrccSlow())
2447 // f32 case is generally profitable. f64 case only makes sense when vcmpe +
2448 // vmrs are very slow, e.g. cortex-a8.
2451 if (isFloatingPointZero(Op)) {
2455 return ISD::isNormalLoad(N);
2458 static SDValue bitcastf32Toi32(SDValue Op, SelectionDAG &DAG) {
2459 if (isFloatingPointZero(Op))
2460 return DAG.getConstant(0, MVT::i32);
2462 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Op))
2463 return DAG.getLoad(MVT::i32, Op.getDebugLoc(),
2464 Ld->getChain(), Ld->getBasePtr(), Ld->getPointerInfo(),
2465 Ld->isVolatile(), Ld->isNonTemporal(),
2466 Ld->getAlignment());
2468 llvm_unreachable("Unknown VFP cmp argument!");
2471 static void expandf64Toi32(SDValue Op, SelectionDAG &DAG,
2472 SDValue &RetVal1, SDValue &RetVal2) {
2473 if (isFloatingPointZero(Op)) {
2474 RetVal1 = DAG.getConstant(0, MVT::i32);
2475 RetVal2 = DAG.getConstant(0, MVT::i32);
2479 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Op)) {
2480 SDValue Ptr = Ld->getBasePtr();
2481 RetVal1 = DAG.getLoad(MVT::i32, Op.getDebugLoc(),
2482 Ld->getChain(), Ptr,
2483 Ld->getPointerInfo(),
2484 Ld->isVolatile(), Ld->isNonTemporal(),
2485 Ld->getAlignment());
2487 EVT PtrType = Ptr.getValueType();
2488 unsigned NewAlign = MinAlign(Ld->getAlignment(), 4);
2489 SDValue NewPtr = DAG.getNode(ISD::ADD, Op.getDebugLoc(),
2490 PtrType, Ptr, DAG.getConstant(4, PtrType));
2491 RetVal2 = DAG.getLoad(MVT::i32, Op.getDebugLoc(),
2492 Ld->getChain(), NewPtr,
2493 Ld->getPointerInfo().getWithOffset(4),
2494 Ld->isVolatile(), Ld->isNonTemporal(),
2499 llvm_unreachable("Unknown VFP cmp argument!");
2502 /// OptimizeVFPBrcond - With -enable-unsafe-fp-math, it's legal to optimize some
2503 /// f32 and even f64 comparisons to integer ones.
2505 ARMTargetLowering::OptimizeVFPBrcond(SDValue Op, SelectionDAG &DAG) const {
2506 SDValue Chain = Op.getOperand(0);
2507 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
2508 SDValue LHS = Op.getOperand(2);
2509 SDValue RHS = Op.getOperand(3);
2510 SDValue Dest = Op.getOperand(4);
2511 DebugLoc dl = Op.getDebugLoc();
2513 bool SeenZero = false;
2514 if (canChangeToInt(LHS, SeenZero, Subtarget) &&
2515 canChangeToInt(RHS, SeenZero, Subtarget) &&
2516 // If one of the operand is zero, it's safe to ignore the NaN case since
2517 // we only care about equality comparisons.
2518 (SeenZero || (DAG.isKnownNeverNaN(LHS) && DAG.isKnownNeverNaN(RHS)))) {
2519 // If unsafe fp math optimization is enabled and there are no othter uses of
2520 // the CMP operands, and the condition code is EQ oe NE, we can optimize it
2521 // to an integer comparison.
2522 if (CC == ISD::SETOEQ)
2524 else if (CC == ISD::SETUNE)
2528 if (LHS.getValueType() == MVT::f32) {
2529 LHS = bitcastf32Toi32(LHS, DAG);
2530 RHS = bitcastf32Toi32(RHS, DAG);
2531 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
2532 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2533 return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other,
2534 Chain, Dest, ARMcc, CCR, Cmp);
2539 expandf64Toi32(LHS, DAG, LHS1, LHS2);
2540 expandf64Toi32(RHS, DAG, RHS1, RHS2);
2541 ARMCC::CondCodes CondCode = IntCCToARMCC(CC);
2542 ARMcc = DAG.getConstant(CondCode, MVT::i32);
2543 SDVTList VTList = DAG.getVTList(MVT::Other, MVT::Flag);
2544 SDValue Ops[] = { Chain, ARMcc, LHS1, LHS2, RHS1, RHS2, Dest };
2545 return DAG.getNode(ARMISD::BCC_i64, dl, VTList, Ops, 7);
2551 SDValue ARMTargetLowering::LowerBR_CC(SDValue Op, SelectionDAG &DAG) const {
2552 SDValue Chain = Op.getOperand(0);
2553 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
2554 SDValue LHS = Op.getOperand(2);
2555 SDValue RHS = Op.getOperand(3);
2556 SDValue Dest = Op.getOperand(4);
2557 DebugLoc dl = Op.getDebugLoc();
2559 if (LHS.getValueType() == MVT::i32) {
2561 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
2562 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2563 return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other,
2564 Chain, Dest, ARMcc, CCR, Cmp);
2567 assert(LHS.getValueType() == MVT::f32 || LHS.getValueType() == MVT::f64);
2570 (CC == ISD::SETEQ || CC == ISD::SETOEQ ||
2571 CC == ISD::SETNE || CC == ISD::SETUNE)) {
2572 SDValue Result = OptimizeVFPBrcond(Op, DAG);
2573 if (Result.getNode())
2577 ARMCC::CondCodes CondCode, CondCode2;
2578 FPCCToARMCC(CC, CondCode, CondCode2);
2580 SDValue ARMcc = DAG.getConstant(CondCode, MVT::i32);
2581 SDValue Cmp = getVFPCmp(LHS, RHS, DAG, dl);
2582 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2583 SDVTList VTList = DAG.getVTList(MVT::Other, MVT::Flag);
2584 SDValue Ops[] = { Chain, Dest, ARMcc, CCR, Cmp };
2585 SDValue Res = DAG.getNode(ARMISD::BRCOND, dl, VTList, Ops, 5);
2586 if (CondCode2 != ARMCC::AL) {
2587 ARMcc = DAG.getConstant(CondCode2, MVT::i32);
2588 SDValue Ops[] = { Res, Dest, ARMcc, CCR, Res.getValue(1) };
2589 Res = DAG.getNode(ARMISD::BRCOND, dl, VTList, Ops, 5);
2594 SDValue ARMTargetLowering::LowerBR_JT(SDValue Op, SelectionDAG &DAG) const {
2595 SDValue Chain = Op.getOperand(0);
2596 SDValue Table = Op.getOperand(1);
2597 SDValue Index = Op.getOperand(2);
2598 DebugLoc dl = Op.getDebugLoc();
2600 EVT PTy = getPointerTy();
2601 JumpTableSDNode *JT = cast<JumpTableSDNode>(Table);
2602 ARMFunctionInfo *AFI = DAG.getMachineFunction().getInfo<ARMFunctionInfo>();
2603 SDValue UId = DAG.getConstant(AFI->createJumpTableUId(), PTy);
2604 SDValue JTI = DAG.getTargetJumpTable(JT->getIndex(), PTy);
2605 Table = DAG.getNode(ARMISD::WrapperJT, dl, MVT::i32, JTI, UId);
2606 Index = DAG.getNode(ISD::MUL, dl, PTy, Index, DAG.getConstant(4, PTy));
2607 SDValue Addr = DAG.getNode(ISD::ADD, dl, PTy, Index, Table);
2608 if (Subtarget->isThumb2()) {
2609 // Thumb2 uses a two-level jump. That is, it jumps into the jump table
2610 // which does another jump to the destination. This also makes it easier
2611 // to translate it to TBB / TBH later.
2612 // FIXME: This might not work if the function is extremely large.
2613 return DAG.getNode(ARMISD::BR2_JT, dl, MVT::Other, Chain,
2614 Addr, Op.getOperand(2), JTI, UId);
2616 if (getTargetMachine().getRelocationModel() == Reloc::PIC_) {
2617 Addr = DAG.getLoad((EVT)MVT::i32, dl, Chain, Addr,
2618 MachinePointerInfo::getJumpTable(),
2620 Chain = Addr.getValue(1);
2621 Addr = DAG.getNode(ISD::ADD, dl, PTy, Addr, Table);
2622 return DAG.getNode(ARMISD::BR_JT, dl, MVT::Other, Chain, Addr, JTI, UId);
2624 Addr = DAG.getLoad(PTy, dl, Chain, Addr,
2625 MachinePointerInfo::getJumpTable(), false, false, 0);
2626 Chain = Addr.getValue(1);
2627 return DAG.getNode(ARMISD::BR_JT, dl, MVT::Other, Chain, Addr, JTI, UId);
2631 static SDValue LowerFP_TO_INT(SDValue Op, SelectionDAG &DAG) {
2632 DebugLoc dl = Op.getDebugLoc();
2635 switch (Op.getOpcode()) {
2637 assert(0 && "Invalid opcode!");
2638 case ISD::FP_TO_SINT:
2639 Opc = ARMISD::FTOSI;
2641 case ISD::FP_TO_UINT:
2642 Opc = ARMISD::FTOUI;
2645 Op = DAG.getNode(Opc, dl, MVT::f32, Op.getOperand(0));
2646 return DAG.getNode(ISD::BIT_CONVERT, dl, MVT::i32, Op);
2649 static SDValue LowerINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
2650 EVT VT = Op.getValueType();
2651 DebugLoc dl = Op.getDebugLoc();
2654 switch (Op.getOpcode()) {
2656 assert(0 && "Invalid opcode!");
2657 case ISD::SINT_TO_FP:
2658 Opc = ARMISD::SITOF;
2660 case ISD::UINT_TO_FP:
2661 Opc = ARMISD::UITOF;
2665 Op = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::f32, Op.getOperand(0));
2666 return DAG.getNode(Opc, dl, VT, Op);
2669 SDValue ARMTargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
2670 // Implement fcopysign with a fabs and a conditional fneg.
2671 SDValue Tmp0 = Op.getOperand(0);
2672 SDValue Tmp1 = Op.getOperand(1);
2673 DebugLoc dl = Op.getDebugLoc();
2674 EVT VT = Op.getValueType();
2675 EVT SrcVT = Tmp1.getValueType();
2676 SDValue AbsVal = DAG.getNode(ISD::FABS, dl, VT, Tmp0);
2677 SDValue ARMcc = DAG.getConstant(ARMCC::LT, MVT::i32);
2678 SDValue FP0 = DAG.getConstantFP(0.0, SrcVT);
2679 SDValue Cmp = getVFPCmp(Tmp1, FP0, DAG, dl);
2680 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2681 return DAG.getNode(ARMISD::CNEG, dl, VT, AbsVal, AbsVal, ARMcc, CCR, Cmp);
2684 SDValue ARMTargetLowering::LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const{
2685 MachineFunction &MF = DAG.getMachineFunction();
2686 MachineFrameInfo *MFI = MF.getFrameInfo();
2687 MFI->setReturnAddressIsTaken(true);
2689 EVT VT = Op.getValueType();
2690 DebugLoc dl = Op.getDebugLoc();
2691 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
2693 SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
2694 SDValue Offset = DAG.getConstant(4, MVT::i32);
2695 return DAG.getLoad(VT, dl, DAG.getEntryNode(),
2696 DAG.getNode(ISD::ADD, dl, VT, FrameAddr, Offset),
2697 MachinePointerInfo(), false, false, 0);
2700 // Return LR, which contains the return address. Mark it an implicit live-in.
2701 unsigned Reg = MF.addLiveIn(ARM::LR, getRegClassFor(MVT::i32));
2702 return DAG.getCopyFromReg(DAG.getEntryNode(), dl, Reg, VT);
2705 SDValue ARMTargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
2706 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
2707 MFI->setFrameAddressIsTaken(true);
2709 EVT VT = Op.getValueType();
2710 DebugLoc dl = Op.getDebugLoc(); // FIXME probably not meaningful
2711 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
2712 unsigned FrameReg = (Subtarget->isThumb() || Subtarget->isTargetDarwin())
2713 ? ARM::R7 : ARM::R11;
2714 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
2716 FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr,
2717 MachinePointerInfo(),
2722 /// ExpandBIT_CONVERT - If the target supports VFP, this function is called to
2723 /// expand a bit convert where either the source or destination type is i64 to
2724 /// use a VMOVDRR or VMOVRRD node. This should not be done when the non-i64
2725 /// operand type is illegal (e.g., v2f32 for a target that doesn't support
2726 /// vectors), since the legalizer won't know what to do with that.
2727 static SDValue ExpandBIT_CONVERT(SDNode *N, SelectionDAG &DAG) {
2728 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
2729 DebugLoc dl = N->getDebugLoc();
2730 SDValue Op = N->getOperand(0);
2732 // This function is only supposed to be called for i64 types, either as the
2733 // source or destination of the bit convert.
2734 EVT SrcVT = Op.getValueType();
2735 EVT DstVT = N->getValueType(0);
2736 assert((SrcVT == MVT::i64 || DstVT == MVT::i64) &&
2737 "ExpandBIT_CONVERT called for non-i64 type");
2739 // Turn i64->f64 into VMOVDRR.
2740 if (SrcVT == MVT::i64 && TLI.isTypeLegal(DstVT)) {
2741 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Op,
2742 DAG.getConstant(0, MVT::i32));
2743 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Op,
2744 DAG.getConstant(1, MVT::i32));
2745 return DAG.getNode(ISD::BIT_CONVERT, dl, DstVT,
2746 DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi));
2749 // Turn f64->i64 into VMOVRRD.
2750 if (DstVT == MVT::i64 && TLI.isTypeLegal(SrcVT)) {
2751 SDValue Cvt = DAG.getNode(ARMISD::VMOVRRD, dl,
2752 DAG.getVTList(MVT::i32, MVT::i32), &Op, 1);
2753 // Merge the pieces into a single i64 value.
2754 return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Cvt, Cvt.getValue(1));
2760 /// getZeroVector - Returns a vector of specified type with all zero elements.
2761 /// Zero vectors are used to represent vector negation and in those cases
2762 /// will be implemented with the NEON VNEG instruction. However, VNEG does
2763 /// not support i64 elements, so sometimes the zero vectors will need to be
2764 /// explicitly constructed. Regardless, use a canonical VMOV to create the
2766 static SDValue getZeroVector(EVT VT, SelectionDAG &DAG, DebugLoc dl) {
2767 assert(VT.isVector() && "Expected a vector type");
2768 // The canonical modified immediate encoding of a zero vector is....0!
2769 SDValue EncodedVal = DAG.getTargetConstant(0, MVT::i32);
2770 EVT VmovVT = VT.is128BitVector() ? MVT::v4i32 : MVT::v2i32;
2771 SDValue Vmov = DAG.getNode(ARMISD::VMOVIMM, dl, VmovVT, EncodedVal);
2772 return DAG.getNode(ISD::BIT_CONVERT, dl, VT, Vmov);
2775 /// LowerShiftRightParts - Lower SRA_PARTS, which returns two
2776 /// i32 values and take a 2 x i32 value to shift plus a shift amount.
2777 SDValue ARMTargetLowering::LowerShiftRightParts(SDValue Op,
2778 SelectionDAG &DAG) const {
2779 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
2780 EVT VT = Op.getValueType();
2781 unsigned VTBits = VT.getSizeInBits();
2782 DebugLoc dl = Op.getDebugLoc();
2783 SDValue ShOpLo = Op.getOperand(0);
2784 SDValue ShOpHi = Op.getOperand(1);
2785 SDValue ShAmt = Op.getOperand(2);
2787 unsigned Opc = (Op.getOpcode() == ISD::SRA_PARTS) ? ISD::SRA : ISD::SRL;
2789 assert(Op.getOpcode() == ISD::SRA_PARTS || Op.getOpcode() == ISD::SRL_PARTS);
2791 SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32,
2792 DAG.getConstant(VTBits, MVT::i32), ShAmt);
2793 SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, ShAmt);
2794 SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, ShAmt,
2795 DAG.getConstant(VTBits, MVT::i32));
2796 SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, RevShAmt);
2797 SDValue FalseVal = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2);
2798 SDValue TrueVal = DAG.getNode(Opc, dl, VT, ShOpHi, ExtraShAmt);
2800 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2801 SDValue Cmp = getARMCmp(ExtraShAmt, DAG.getConstant(0, MVT::i32), ISD::SETGE,
2803 SDValue Hi = DAG.getNode(Opc, dl, VT, ShOpHi, ShAmt);
2804 SDValue Lo = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal, ARMcc,
2807 SDValue Ops[2] = { Lo, Hi };
2808 return DAG.getMergeValues(Ops, 2, dl);
2811 /// LowerShiftLeftParts - Lower SHL_PARTS, which returns two
2812 /// i32 values and take a 2 x i32 value to shift plus a shift amount.
2813 SDValue ARMTargetLowering::LowerShiftLeftParts(SDValue Op,
2814 SelectionDAG &DAG) const {
2815 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
2816 EVT VT = Op.getValueType();
2817 unsigned VTBits = VT.getSizeInBits();
2818 DebugLoc dl = Op.getDebugLoc();
2819 SDValue ShOpLo = Op.getOperand(0);
2820 SDValue ShOpHi = Op.getOperand(1);
2821 SDValue ShAmt = Op.getOperand(2);
2824 assert(Op.getOpcode() == ISD::SHL_PARTS);
2825 SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32,
2826 DAG.getConstant(VTBits, MVT::i32), ShAmt);
2827 SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, RevShAmt);
2828 SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, ShAmt,
2829 DAG.getConstant(VTBits, MVT::i32));
2830 SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, ShAmt);
2831 SDValue Tmp3 = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ExtraShAmt);
2833 SDValue FalseVal = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2);
2834 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2835 SDValue Cmp = getARMCmp(ExtraShAmt, DAG.getConstant(0, MVT::i32), ISD::SETGE,
2837 SDValue Lo = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ShAmt);
2838 SDValue Hi = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, Tmp3, ARMcc,
2841 SDValue Ops[2] = { Lo, Hi };
2842 return DAG.getMergeValues(Ops, 2, dl);
2845 SDValue ARMTargetLowering::LowerFLT_ROUNDS_(SDValue Op,
2846 SelectionDAG &DAG) const {
2847 // The rounding mode is in bits 23:22 of the FPSCR.
2848 // The ARM rounding mode value to FLT_ROUNDS mapping is 0->1, 1->2, 2->3, 3->0
2849 // The formula we use to implement this is (((FPSCR + 1 << 22) >> 22) & 3)
2850 // so that the shift + and get folded into a bitfield extract.
2851 DebugLoc dl = Op.getDebugLoc();
2852 SDValue FPSCR = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::i32,
2853 DAG.getConstant(Intrinsic::arm_get_fpscr,
2855 SDValue FltRounds = DAG.getNode(ISD::ADD, dl, MVT::i32, FPSCR,
2856 DAG.getConstant(1U << 22, MVT::i32));
2857 SDValue RMODE = DAG.getNode(ISD::SRL, dl, MVT::i32, FltRounds,
2858 DAG.getConstant(22, MVT::i32));
2859 return DAG.getNode(ISD::AND, dl, MVT::i32, RMODE,
2860 DAG.getConstant(3, MVT::i32));
2863 static SDValue LowerCTTZ(SDNode *N, SelectionDAG &DAG,
2864 const ARMSubtarget *ST) {
2865 EVT VT = N->getValueType(0);
2866 DebugLoc dl = N->getDebugLoc();
2868 if (!ST->hasV6T2Ops())
2871 SDValue rbit = DAG.getNode(ARMISD::RBIT, dl, VT, N->getOperand(0));
2872 return DAG.getNode(ISD::CTLZ, dl, VT, rbit);
2875 static SDValue LowerShift(SDNode *N, SelectionDAG &DAG,
2876 const ARMSubtarget *ST) {
2877 EVT VT = N->getValueType(0);
2878 DebugLoc dl = N->getDebugLoc();
2880 // Lower vector shifts on NEON to use VSHL.
2881 if (VT.isVector()) {
2882 assert(ST->hasNEON() && "unexpected vector shift");
2884 // Left shifts translate directly to the vshiftu intrinsic.
2885 if (N->getOpcode() == ISD::SHL)
2886 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
2887 DAG.getConstant(Intrinsic::arm_neon_vshiftu, MVT::i32),
2888 N->getOperand(0), N->getOperand(1));
2890 assert((N->getOpcode() == ISD::SRA ||
2891 N->getOpcode() == ISD::SRL) && "unexpected vector shift opcode");
2893 // NEON uses the same intrinsics for both left and right shifts. For
2894 // right shifts, the shift amounts are negative, so negate the vector of
2896 EVT ShiftVT = N->getOperand(1).getValueType();
2897 SDValue NegatedCount = DAG.getNode(ISD::SUB, dl, ShiftVT,
2898 getZeroVector(ShiftVT, DAG, dl),
2900 Intrinsic::ID vshiftInt = (N->getOpcode() == ISD::SRA ?
2901 Intrinsic::arm_neon_vshifts :
2902 Intrinsic::arm_neon_vshiftu);
2903 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
2904 DAG.getConstant(vshiftInt, MVT::i32),
2905 N->getOperand(0), NegatedCount);
2908 // We can get here for a node like i32 = ISD::SHL i32, i64
2912 assert((N->getOpcode() == ISD::SRL || N->getOpcode() == ISD::SRA) &&
2913 "Unknown shift to lower!");
2915 // We only lower SRA, SRL of 1 here, all others use generic lowering.
2916 if (!isa<ConstantSDNode>(N->getOperand(1)) ||
2917 cast<ConstantSDNode>(N->getOperand(1))->getZExtValue() != 1)
2920 // If we are in thumb mode, we don't have RRX.
2921 if (ST->isThumb1Only()) return SDValue();
2923 // Okay, we have a 64-bit SRA or SRL of 1. Lower this to an RRX expr.
2924 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0),
2925 DAG.getConstant(0, MVT::i32));
2926 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0),
2927 DAG.getConstant(1, MVT::i32));
2929 // First, build a SRA_FLAG/SRL_FLAG op, which shifts the top part by one and
2930 // captures the result into a carry flag.
2931 unsigned Opc = N->getOpcode() == ISD::SRL ? ARMISD::SRL_FLAG:ARMISD::SRA_FLAG;
2932 Hi = DAG.getNode(Opc, dl, DAG.getVTList(MVT::i32, MVT::Flag), &Hi, 1);
2934 // The low part is an ARMISD::RRX operand, which shifts the carry in.
2935 Lo = DAG.getNode(ARMISD::RRX, dl, MVT::i32, Lo, Hi.getValue(1));
2937 // Merge the pieces into a single i64 value.
2938 return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Lo, Hi);
2941 static SDValue LowerVSETCC(SDValue Op, SelectionDAG &DAG) {
2942 SDValue TmpOp0, TmpOp1;
2943 bool Invert = false;
2947 SDValue Op0 = Op.getOperand(0);
2948 SDValue Op1 = Op.getOperand(1);
2949 SDValue CC = Op.getOperand(2);
2950 EVT VT = Op.getValueType();
2951 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
2952 DebugLoc dl = Op.getDebugLoc();
2954 if (Op.getOperand(1).getValueType().isFloatingPoint()) {
2955 switch (SetCCOpcode) {
2956 default: llvm_unreachable("Illegal FP comparison"); break;
2958 case ISD::SETNE: Invert = true; // Fallthrough
2960 case ISD::SETEQ: Opc = ARMISD::VCEQ; break;
2962 case ISD::SETLT: Swap = true; // Fallthrough
2964 case ISD::SETGT: Opc = ARMISD::VCGT; break;
2966 case ISD::SETLE: Swap = true; // Fallthrough
2968 case ISD::SETGE: Opc = ARMISD::VCGE; break;
2969 case ISD::SETUGE: Swap = true; // Fallthrough
2970 case ISD::SETULE: Invert = true; Opc = ARMISD::VCGT; break;
2971 case ISD::SETUGT: Swap = true; // Fallthrough
2972 case ISD::SETULT: Invert = true; Opc = ARMISD::VCGE; break;
2973 case ISD::SETUEQ: Invert = true; // Fallthrough
2975 // Expand this to (OLT | OGT).
2979 Op0 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp1, TmpOp0);
2980 Op1 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp0, TmpOp1);
2982 case ISD::SETUO: Invert = true; // Fallthrough
2984 // Expand this to (OLT | OGE).
2988 Op0 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp1, TmpOp0);
2989 Op1 = DAG.getNode(ARMISD::VCGE, dl, VT, TmpOp0, TmpOp1);
2993 // Integer comparisons.
2994 switch (SetCCOpcode) {
2995 default: llvm_unreachable("Illegal integer comparison"); break;
2996 case ISD::SETNE: Invert = true;
2997 case ISD::SETEQ: Opc = ARMISD::VCEQ; break;
2998 case ISD::SETLT: Swap = true;
2999 case ISD::SETGT: Opc = ARMISD::VCGT; break;
3000 case ISD::SETLE: Swap = true;
3001 case ISD::SETGE: Opc = ARMISD::VCGE; break;
3002 case ISD::SETULT: Swap = true;
3003 case ISD::SETUGT: Opc = ARMISD::VCGTU; break;
3004 case ISD::SETULE: Swap = true;
3005 case ISD::SETUGE: Opc = ARMISD::VCGEU; break;
3008 // Detect VTST (Vector Test Bits) = icmp ne (and (op0, op1), zero).
3009 if (Opc == ARMISD::VCEQ) {
3012 if (ISD::isBuildVectorAllZeros(Op1.getNode()))
3014 else if (ISD::isBuildVectorAllZeros(Op0.getNode()))
3017 // Ignore bitconvert.
3018 if (AndOp.getNode() && AndOp.getOpcode() == ISD::BIT_CONVERT)
3019 AndOp = AndOp.getOperand(0);
3021 if (AndOp.getNode() && AndOp.getOpcode() == ISD::AND) {
3023 Op0 = DAG.getNode(ISD::BIT_CONVERT, dl, VT, AndOp.getOperand(0));
3024 Op1 = DAG.getNode(ISD::BIT_CONVERT, dl, VT, AndOp.getOperand(1));
3031 std::swap(Op0, Op1);
3033 SDValue Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
3036 Result = DAG.getNOT(dl, Result, VT);
3041 /// isNEONModifiedImm - Check if the specified splat value corresponds to a
3042 /// valid vector constant for a NEON instruction with a "modified immediate"
3043 /// operand (e.g., VMOV). If so, return the encoded value.
3044 static SDValue isNEONModifiedImm(uint64_t SplatBits, uint64_t SplatUndef,
3045 unsigned SplatBitSize, SelectionDAG &DAG,
3046 EVT &VT, bool is128Bits, bool isVMOV) {
3047 unsigned OpCmode, Imm;
3049 // SplatBitSize is set to the smallest size that splats the vector, so a
3050 // zero vector will always have SplatBitSize == 8. However, NEON modified
3051 // immediate instructions others than VMOV do not support the 8-bit encoding
3052 // of a zero vector, and the default encoding of zero is supposed to be the
3057 switch (SplatBitSize) {
3061 // Any 1-byte value is OK. Op=0, Cmode=1110.
3062 assert((SplatBits & ~0xff) == 0 && "one byte splat value is too big");
3065 VT = is128Bits ? MVT::v16i8 : MVT::v8i8;
3069 // NEON's 16-bit VMOV supports splat values where only one byte is nonzero.
3070 VT = is128Bits ? MVT::v8i16 : MVT::v4i16;
3071 if ((SplatBits & ~0xff) == 0) {
3072 // Value = 0x00nn: Op=x, Cmode=100x.
3077 if ((SplatBits & ~0xff00) == 0) {
3078 // Value = 0xnn00: Op=x, Cmode=101x.
3080 Imm = SplatBits >> 8;
3086 // NEON's 32-bit VMOV supports splat values where:
3087 // * only one byte is nonzero, or
3088 // * the least significant byte is 0xff and the second byte is nonzero, or
3089 // * the least significant 2 bytes are 0xff and the third is nonzero.
3090 VT = is128Bits ? MVT::v4i32 : MVT::v2i32;
3091 if ((SplatBits & ~0xff) == 0) {
3092 // Value = 0x000000nn: Op=x, Cmode=000x.
3097 if ((SplatBits & ~0xff00) == 0) {
3098 // Value = 0x0000nn00: Op=x, Cmode=001x.
3100 Imm = SplatBits >> 8;
3103 if ((SplatBits & ~0xff0000) == 0) {
3104 // Value = 0x00nn0000: Op=x, Cmode=010x.
3106 Imm = SplatBits >> 16;
3109 if ((SplatBits & ~0xff000000) == 0) {
3110 // Value = 0xnn000000: Op=x, Cmode=011x.
3112 Imm = SplatBits >> 24;
3116 if ((SplatBits & ~0xffff) == 0 &&
3117 ((SplatBits | SplatUndef) & 0xff) == 0xff) {
3118 // Value = 0x0000nnff: Op=x, Cmode=1100.
3120 Imm = SplatBits >> 8;
3125 if ((SplatBits & ~0xffffff) == 0 &&
3126 ((SplatBits | SplatUndef) & 0xffff) == 0xffff) {
3127 // Value = 0x00nnffff: Op=x, Cmode=1101.
3129 Imm = SplatBits >> 16;
3130 SplatBits |= 0xffff;
3134 // Note: there are a few 32-bit splat values (specifically: 00ffff00,
3135 // ff000000, ff0000ff, and ffff00ff) that are valid for VMOV.I64 but not
3136 // VMOV.I32. A (very) minor optimization would be to replicate the value
3137 // and fall through here to test for a valid 64-bit splat. But, then the
3138 // caller would also need to check and handle the change in size.
3144 // NEON has a 64-bit VMOV splat where each byte is either 0 or 0xff.
3145 uint64_t BitMask = 0xff;
3147 unsigned ImmMask = 1;
3149 for (int ByteNum = 0; ByteNum < 8; ++ByteNum) {
3150 if (((SplatBits | SplatUndef) & BitMask) == BitMask) {
3153 } else if ((SplatBits & BitMask) != 0) {
3159 // Op=1, Cmode=1110.
3162 VT = is128Bits ? MVT::v2i64 : MVT::v1i64;
3167 llvm_unreachable("unexpected size for isNEONModifiedImm");
3171 unsigned EncodedVal = ARM_AM::createNEONModImm(OpCmode, Imm);
3172 return DAG.getTargetConstant(EncodedVal, MVT::i32);
3175 static bool isVEXTMask(const SmallVectorImpl<int> &M, EVT VT,
3176 bool &ReverseVEXT, unsigned &Imm) {
3177 unsigned NumElts = VT.getVectorNumElements();
3178 ReverseVEXT = false;
3180 // Assume that the first shuffle index is not UNDEF. Fail if it is.
3186 // If this is a VEXT shuffle, the immediate value is the index of the first
3187 // element. The other shuffle indices must be the successive elements after
3189 unsigned ExpectedElt = Imm;
3190 for (unsigned i = 1; i < NumElts; ++i) {
3191 // Increment the expected index. If it wraps around, it may still be
3192 // a VEXT but the source vectors must be swapped.
3194 if (ExpectedElt == NumElts * 2) {
3199 if (M[i] < 0) continue; // ignore UNDEF indices
3200 if (ExpectedElt != static_cast<unsigned>(M[i]))
3204 // Adjust the index value if the source operands will be swapped.
3211 /// isVREVMask - Check if a vector shuffle corresponds to a VREV
3212 /// instruction with the specified blocksize. (The order of the elements
3213 /// within each block of the vector is reversed.)
3214 static bool isVREVMask(const SmallVectorImpl<int> &M, EVT VT,
3215 unsigned BlockSize) {
3216 assert((BlockSize==16 || BlockSize==32 || BlockSize==64) &&
3217 "Only possible block sizes for VREV are: 16, 32, 64");
3219 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3223 unsigned NumElts = VT.getVectorNumElements();
3224 unsigned BlockElts = M[0] + 1;
3225 // If the first shuffle index is UNDEF, be optimistic.
3227 BlockElts = BlockSize / EltSz;
3229 if (BlockSize <= EltSz || BlockSize != BlockElts * EltSz)
3232 for (unsigned i = 0; i < NumElts; ++i) {
3233 if (M[i] < 0) continue; // ignore UNDEF indices
3234 if ((unsigned) M[i] != (i - i%BlockElts) + (BlockElts - 1 - i%BlockElts))
3241 static bool isVTRNMask(const SmallVectorImpl<int> &M, EVT VT,
3242 unsigned &WhichResult) {
3243 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3247 unsigned NumElts = VT.getVectorNumElements();
3248 WhichResult = (M[0] == 0 ? 0 : 1);
3249 for (unsigned i = 0; i < NumElts; i += 2) {
3250 if ((M[i] >= 0 && (unsigned) M[i] != i + WhichResult) ||
3251 (M[i+1] >= 0 && (unsigned) M[i+1] != i + NumElts + WhichResult))
3257 /// isVTRN_v_undef_Mask - Special case of isVTRNMask for canonical form of
3258 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
3259 /// Mask is e.g., <0, 0, 2, 2> instead of <0, 4, 2, 6>.
3260 static bool isVTRN_v_undef_Mask(const SmallVectorImpl<int> &M, EVT VT,
3261 unsigned &WhichResult) {
3262 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3266 unsigned NumElts = VT.getVectorNumElements();
3267 WhichResult = (M[0] == 0 ? 0 : 1);
3268 for (unsigned i = 0; i < NumElts; i += 2) {
3269 if ((M[i] >= 0 && (unsigned) M[i] != i + WhichResult) ||
3270 (M[i+1] >= 0 && (unsigned) M[i+1] != i + WhichResult))
3276 static bool isVUZPMask(const SmallVectorImpl<int> &M, EVT VT,
3277 unsigned &WhichResult) {
3278 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3282 unsigned NumElts = VT.getVectorNumElements();
3283 WhichResult = (M[0] == 0 ? 0 : 1);
3284 for (unsigned i = 0; i != NumElts; ++i) {
3285 if (M[i] < 0) continue; // ignore UNDEF indices
3286 if ((unsigned) M[i] != 2 * i + WhichResult)
3290 // VUZP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
3291 if (VT.is64BitVector() && EltSz == 32)
3297 /// isVUZP_v_undef_Mask - Special case of isVUZPMask for canonical form of
3298 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
3299 /// Mask is e.g., <0, 2, 0, 2> instead of <0, 2, 4, 6>,
3300 static bool isVUZP_v_undef_Mask(const SmallVectorImpl<int> &M, EVT VT,
3301 unsigned &WhichResult) {
3302 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3306 unsigned Half = VT.getVectorNumElements() / 2;
3307 WhichResult = (M[0] == 0 ? 0 : 1);
3308 for (unsigned j = 0; j != 2; ++j) {
3309 unsigned Idx = WhichResult;
3310 for (unsigned i = 0; i != Half; ++i) {
3311 int MIdx = M[i + j * Half];
3312 if (MIdx >= 0 && (unsigned) MIdx != Idx)
3318 // VUZP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
3319 if (VT.is64BitVector() && EltSz == 32)
3325 static bool isVZIPMask(const SmallVectorImpl<int> &M, EVT VT,
3326 unsigned &WhichResult) {
3327 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3331 unsigned NumElts = VT.getVectorNumElements();
3332 WhichResult = (M[0] == 0 ? 0 : 1);
3333 unsigned Idx = WhichResult * NumElts / 2;
3334 for (unsigned i = 0; i != NumElts; i += 2) {
3335 if ((M[i] >= 0 && (unsigned) M[i] != Idx) ||
3336 (M[i+1] >= 0 && (unsigned) M[i+1] != Idx + NumElts))
3341 // VZIP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
3342 if (VT.is64BitVector() && EltSz == 32)
3348 /// isVZIP_v_undef_Mask - Special case of isVZIPMask for canonical form of
3349 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
3350 /// Mask is e.g., <0, 0, 1, 1> instead of <0, 4, 1, 5>.
3351 static bool isVZIP_v_undef_Mask(const SmallVectorImpl<int> &M, EVT VT,
3352 unsigned &WhichResult) {
3353 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3357 unsigned NumElts = VT.getVectorNumElements();
3358 WhichResult = (M[0] == 0 ? 0 : 1);
3359 unsigned Idx = WhichResult * NumElts / 2;
3360 for (unsigned i = 0; i != NumElts; i += 2) {
3361 if ((M[i] >= 0 && (unsigned) M[i] != Idx) ||
3362 (M[i+1] >= 0 && (unsigned) M[i+1] != Idx))
3367 // VZIP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
3368 if (VT.is64BitVector() && EltSz == 32)
3374 // If N is an integer constant that can be moved into a register in one
3375 // instruction, return an SDValue of such a constant (will become a MOV
3376 // instruction). Otherwise return null.
3377 static SDValue IsSingleInstrConstant(SDValue N, SelectionDAG &DAG,
3378 const ARMSubtarget *ST, DebugLoc dl) {
3380 if (!isa<ConstantSDNode>(N))
3382 Val = cast<ConstantSDNode>(N)->getZExtValue();
3384 if (ST->isThumb1Only()) {
3385 if (Val <= 255 || ~Val <= 255)
3386 return DAG.getConstant(Val, MVT::i32);
3388 if (ARM_AM::getSOImmVal(Val) != -1 || ARM_AM::getSOImmVal(~Val) != -1)
3389 return DAG.getConstant(Val, MVT::i32);
3394 // If this is a case we can't handle, return null and let the default
3395 // expansion code take care of it.
3396 static SDValue LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG,
3397 const ARMSubtarget *ST) {
3398 BuildVectorSDNode *BVN = cast<BuildVectorSDNode>(Op.getNode());
3399 DebugLoc dl = Op.getDebugLoc();
3400 EVT VT = Op.getValueType();
3402 APInt SplatBits, SplatUndef;
3403 unsigned SplatBitSize;
3405 if (BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
3406 if (SplatBitSize <= 64) {
3407 // Check if an immediate VMOV works.
3409 SDValue Val = isNEONModifiedImm(SplatBits.getZExtValue(),
3410 SplatUndef.getZExtValue(), SplatBitSize,
3411 DAG, VmovVT, VT.is128BitVector(), true);
3412 if (Val.getNode()) {
3413 SDValue Vmov = DAG.getNode(ARMISD::VMOVIMM, dl, VmovVT, Val);
3414 return DAG.getNode(ISD::BIT_CONVERT, dl, VT, Vmov);
3417 // Try an immediate VMVN.
3418 uint64_t NegatedImm = (SplatBits.getZExtValue() ^
3419 ((1LL << SplatBitSize) - 1));
3420 Val = isNEONModifiedImm(NegatedImm,
3421 SplatUndef.getZExtValue(), SplatBitSize,
3422 DAG, VmovVT, VT.is128BitVector(), false);
3423 if (Val.getNode()) {
3424 SDValue Vmov = DAG.getNode(ARMISD::VMVNIMM, dl, VmovVT, Val);
3425 return DAG.getNode(ISD::BIT_CONVERT, dl, VT, Vmov);
3430 // Scan through the operands to see if only one value is used.
3431 unsigned NumElts = VT.getVectorNumElements();
3432 bool isOnlyLowElement = true;
3433 bool usesOnlyOneValue = true;
3434 bool isConstant = true;
3436 for (unsigned i = 0; i < NumElts; ++i) {
3437 SDValue V = Op.getOperand(i);
3438 if (V.getOpcode() == ISD::UNDEF)
3441 isOnlyLowElement = false;
3442 if (!isa<ConstantFPSDNode>(V) && !isa<ConstantSDNode>(V))
3445 if (!Value.getNode())
3447 else if (V != Value)
3448 usesOnlyOneValue = false;
3451 if (!Value.getNode())
3452 return DAG.getUNDEF(VT);
3454 if (isOnlyLowElement)
3455 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Value);
3457 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
3459 // Use VDUP for non-constant splats. For f32 constant splats, reduce to
3460 // i32 and try again.
3461 if (usesOnlyOneValue && EltSize <= 32) {
3463 return DAG.getNode(ARMISD::VDUP, dl, VT, Value);
3464 if (VT.getVectorElementType().isFloatingPoint()) {
3465 SmallVector<SDValue, 8> Ops;
3466 for (unsigned i = 0; i < NumElts; ++i)
3467 Ops.push_back(DAG.getNode(ISD::BIT_CONVERT, dl, MVT::i32,
3469 SDValue Val = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, &Ops[0],
3471 Val = LowerBUILD_VECTOR(Val, DAG, ST);
3473 return DAG.getNode(ISD::BIT_CONVERT, dl, VT, Val);
3475 SDValue Val = IsSingleInstrConstant(Value, DAG, ST, dl);
3477 return DAG.getNode(ARMISD::VDUP, dl, VT, Val);
3480 // If all elements are constants and the case above didn't get hit, fall back
3481 // to the default expansion, which will generate a load from the constant
3486 // Vectors with 32- or 64-bit elements can be built by directly assigning
3487 // the subregisters. Lower it to an ARMISD::BUILD_VECTOR so the operands
3488 // will be legalized.
3489 if (EltSize >= 32) {
3490 // Do the expansion with floating-point types, since that is what the VFP
3491 // registers are defined to use, and since i64 is not legal.
3492 EVT EltVT = EVT::getFloatingPointVT(EltSize);
3493 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), EltVT, NumElts);
3494 SmallVector<SDValue, 8> Ops;
3495 for (unsigned i = 0; i < NumElts; ++i)
3496 Ops.push_back(DAG.getNode(ISD::BIT_CONVERT, dl, EltVT, Op.getOperand(i)));
3497 SDValue Val = DAG.getNode(ARMISD::BUILD_VECTOR, dl, VecVT, &Ops[0],NumElts);
3498 return DAG.getNode(ISD::BIT_CONVERT, dl, VT, Val);
3504 /// isShuffleMaskLegal - Targets can use this to indicate that they only
3505 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
3506 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
3507 /// are assumed to be legal.
3509 ARMTargetLowering::isShuffleMaskLegal(const SmallVectorImpl<int> &M,
3511 if (VT.getVectorNumElements() == 4 &&
3512 (VT.is128BitVector() || VT.is64BitVector())) {
3513 unsigned PFIndexes[4];
3514 for (unsigned i = 0; i != 4; ++i) {
3518 PFIndexes[i] = M[i];
3521 // Compute the index in the perfect shuffle table.
3522 unsigned PFTableIndex =
3523 PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3];
3524 unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
3525 unsigned Cost = (PFEntry >> 30);
3532 unsigned Imm, WhichResult;
3534 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
3535 return (EltSize >= 32 ||
3536 ShuffleVectorSDNode::isSplatMask(&M[0], VT) ||
3537 isVREVMask(M, VT, 64) ||
3538 isVREVMask(M, VT, 32) ||
3539 isVREVMask(M, VT, 16) ||
3540 isVEXTMask(M, VT, ReverseVEXT, Imm) ||
3541 isVTRNMask(M, VT, WhichResult) ||
3542 isVUZPMask(M, VT, WhichResult) ||
3543 isVZIPMask(M, VT, WhichResult) ||
3544 isVTRN_v_undef_Mask(M, VT, WhichResult) ||
3545 isVUZP_v_undef_Mask(M, VT, WhichResult) ||
3546 isVZIP_v_undef_Mask(M, VT, WhichResult));
3549 /// GeneratePerfectShuffle - Given an entry in the perfect-shuffle table, emit
3550 /// the specified operations to build the shuffle.
3551 static SDValue GeneratePerfectShuffle(unsigned PFEntry, SDValue LHS,
3552 SDValue RHS, SelectionDAG &DAG,
3554 unsigned OpNum = (PFEntry >> 26) & 0x0F;
3555 unsigned LHSID = (PFEntry >> 13) & ((1 << 13)-1);
3556 unsigned RHSID = (PFEntry >> 0) & ((1 << 13)-1);
3559 OP_COPY = 0, // Copy, used for things like <u,u,u,3> to say it is <0,1,2,3>
3568 OP_VUZPL, // VUZP, left result
3569 OP_VUZPR, // VUZP, right result
3570 OP_VZIPL, // VZIP, left result
3571 OP_VZIPR, // VZIP, right result
3572 OP_VTRNL, // VTRN, left result
3573 OP_VTRNR // VTRN, right result
3576 if (OpNum == OP_COPY) {
3577 if (LHSID == (1*9+2)*9+3) return LHS;
3578 assert(LHSID == ((4*9+5)*9+6)*9+7 && "Illegal OP_COPY!");
3582 SDValue OpLHS, OpRHS;
3583 OpLHS = GeneratePerfectShuffle(PerfectShuffleTable[LHSID], LHS, RHS, DAG, dl);
3584 OpRHS = GeneratePerfectShuffle(PerfectShuffleTable[RHSID], LHS, RHS, DAG, dl);
3585 EVT VT = OpLHS.getValueType();
3588 default: llvm_unreachable("Unknown shuffle opcode!");
3590 return DAG.getNode(ARMISD::VREV64, dl, VT, OpLHS);
3595 return DAG.getNode(ARMISD::VDUPLANE, dl, VT,
3596 OpLHS, DAG.getConstant(OpNum-OP_VDUP0, MVT::i32));
3600 return DAG.getNode(ARMISD::VEXT, dl, VT,
3602 DAG.getConstant(OpNum-OP_VEXT1+1, MVT::i32));
3605 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
3606 OpLHS, OpRHS).getValue(OpNum-OP_VUZPL);
3609 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
3610 OpLHS, OpRHS).getValue(OpNum-OP_VZIPL);
3613 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
3614 OpLHS, OpRHS).getValue(OpNum-OP_VTRNL);
3618 static SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) {
3619 SDValue V1 = Op.getOperand(0);
3620 SDValue V2 = Op.getOperand(1);
3621 DebugLoc dl = Op.getDebugLoc();
3622 EVT VT = Op.getValueType();
3623 ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(Op.getNode());
3624 SmallVector<int, 8> ShuffleMask;
3626 // Convert shuffles that are directly supported on NEON to target-specific
3627 // DAG nodes, instead of keeping them as shuffles and matching them again
3628 // during code selection. This is more efficient and avoids the possibility
3629 // of inconsistencies between legalization and selection.
3630 // FIXME: floating-point vectors should be canonicalized to integer vectors
3631 // of the same time so that they get CSEd properly.
3632 SVN->getMask(ShuffleMask);
3634 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
3635 if (EltSize <= 32) {
3636 if (ShuffleVectorSDNode::isSplatMask(&ShuffleMask[0], VT)) {
3637 int Lane = SVN->getSplatIndex();
3638 // If this is undef splat, generate it via "just" vdup, if possible.
3639 if (Lane == -1) Lane = 0;
3641 if (Lane == 0 && V1.getOpcode() == ISD::SCALAR_TO_VECTOR) {
3642 return DAG.getNode(ARMISD::VDUP, dl, VT, V1.getOperand(0));
3644 return DAG.getNode(ARMISD::VDUPLANE, dl, VT, V1,
3645 DAG.getConstant(Lane, MVT::i32));
3650 if (isVEXTMask(ShuffleMask, VT, ReverseVEXT, Imm)) {
3653 return DAG.getNode(ARMISD::VEXT, dl, VT, V1, V2,
3654 DAG.getConstant(Imm, MVT::i32));
3657 if (isVREVMask(ShuffleMask, VT, 64))
3658 return DAG.getNode(ARMISD::VREV64, dl, VT, V1);
3659 if (isVREVMask(ShuffleMask, VT, 32))
3660 return DAG.getNode(ARMISD::VREV32, dl, VT, V1);
3661 if (isVREVMask(ShuffleMask, VT, 16))
3662 return DAG.getNode(ARMISD::VREV16, dl, VT, V1);
3664 // Check for Neon shuffles that modify both input vectors in place.
3665 // If both results are used, i.e., if there are two shuffles with the same
3666 // source operands and with masks corresponding to both results of one of
3667 // these operations, DAG memoization will ensure that a single node is
3668 // used for both shuffles.
3669 unsigned WhichResult;
3670 if (isVTRNMask(ShuffleMask, VT, WhichResult))
3671 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
3672 V1, V2).getValue(WhichResult);
3673 if (isVUZPMask(ShuffleMask, VT, WhichResult))
3674 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
3675 V1, V2).getValue(WhichResult);
3676 if (isVZIPMask(ShuffleMask, VT, WhichResult))
3677 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
3678 V1, V2).getValue(WhichResult);
3680 if (isVTRN_v_undef_Mask(ShuffleMask, VT, WhichResult))
3681 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
3682 V1, V1).getValue(WhichResult);
3683 if (isVUZP_v_undef_Mask(ShuffleMask, VT, WhichResult))
3684 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
3685 V1, V1).getValue(WhichResult);
3686 if (isVZIP_v_undef_Mask(ShuffleMask, VT, WhichResult))
3687 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
3688 V1, V1).getValue(WhichResult);
3691 // If the shuffle is not directly supported and it has 4 elements, use
3692 // the PerfectShuffle-generated table to synthesize it from other shuffles.
3693 unsigned NumElts = VT.getVectorNumElements();
3695 unsigned PFIndexes[4];
3696 for (unsigned i = 0; i != 4; ++i) {
3697 if (ShuffleMask[i] < 0)
3700 PFIndexes[i] = ShuffleMask[i];
3703 // Compute the index in the perfect shuffle table.
3704 unsigned PFTableIndex =
3705 PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3];
3706 unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
3707 unsigned Cost = (PFEntry >> 30);
3710 return GeneratePerfectShuffle(PFEntry, V1, V2, DAG, dl);
3713 // Implement shuffles with 32- or 64-bit elements as ARMISD::BUILD_VECTORs.
3714 if (EltSize >= 32) {
3715 // Do the expansion with floating-point types, since that is what the VFP
3716 // registers are defined to use, and since i64 is not legal.
3717 EVT EltVT = EVT::getFloatingPointVT(EltSize);
3718 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), EltVT, NumElts);
3719 V1 = DAG.getNode(ISD::BIT_CONVERT, dl, VecVT, V1);
3720 V2 = DAG.getNode(ISD::BIT_CONVERT, dl, VecVT, V2);
3721 SmallVector<SDValue, 8> Ops;
3722 for (unsigned i = 0; i < NumElts; ++i) {
3723 if (ShuffleMask[i] < 0)
3724 Ops.push_back(DAG.getUNDEF(EltVT));
3726 Ops.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT,
3727 ShuffleMask[i] < (int)NumElts ? V1 : V2,
3728 DAG.getConstant(ShuffleMask[i] & (NumElts-1),
3731 SDValue Val = DAG.getNode(ARMISD::BUILD_VECTOR, dl, VecVT, &Ops[0],NumElts);
3732 return DAG.getNode(ISD::BIT_CONVERT, dl, VT, Val);
3738 static SDValue LowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) {
3739 EVT VT = Op.getValueType();
3740 DebugLoc dl = Op.getDebugLoc();
3741 SDValue Vec = Op.getOperand(0);
3742 SDValue Lane = Op.getOperand(1);
3743 assert(VT == MVT::i32 &&
3744 Vec.getValueType().getVectorElementType().getSizeInBits() < 32 &&
3745 "unexpected type for custom-lowering vector extract");
3746 return DAG.getNode(ARMISD::VGETLANEu, dl, MVT::i32, Vec, Lane);
3749 static SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
3750 // The only time a CONCAT_VECTORS operation can have legal types is when
3751 // two 64-bit vectors are concatenated to a 128-bit vector.
3752 assert(Op.getValueType().is128BitVector() && Op.getNumOperands() == 2 &&
3753 "unexpected CONCAT_VECTORS");
3754 DebugLoc dl = Op.getDebugLoc();
3755 SDValue Val = DAG.getUNDEF(MVT::v2f64);
3756 SDValue Op0 = Op.getOperand(0);
3757 SDValue Op1 = Op.getOperand(1);
3758 if (Op0.getOpcode() != ISD::UNDEF)
3759 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Val,
3760 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::f64, Op0),
3761 DAG.getIntPtrConstant(0));
3762 if (Op1.getOpcode() != ISD::UNDEF)
3763 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Val,
3764 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::f64, Op1),
3765 DAG.getIntPtrConstant(1));
3766 return DAG.getNode(ISD::BIT_CONVERT, dl, Op.getValueType(), Val);
3769 /// SkipExtension - For a node that is either a SIGN_EXTEND, ZERO_EXTEND, or
3770 /// an extending load, return the unextended value.
3771 static SDValue SkipExtension(SDNode *N, SelectionDAG &DAG) {
3772 if (N->getOpcode() == ISD::SIGN_EXTEND || N->getOpcode() == ISD::ZERO_EXTEND)
3773 return N->getOperand(0);
3774 LoadSDNode *LD = cast<LoadSDNode>(N);
3775 return DAG.getLoad(LD->getMemoryVT(), N->getDebugLoc(), LD->getChain(),
3776 LD->getBasePtr(), LD->getPointerInfo(), LD->isVolatile(),
3777 LD->isNonTemporal(), LD->getAlignment());
3780 static SDValue LowerMUL(SDValue Op, SelectionDAG &DAG) {
3781 // Multiplications are only custom-lowered for 128-bit vectors so that
3782 // VMULL can be detected. Otherwise v2i64 multiplications are not legal.
3783 EVT VT = Op.getValueType();
3784 assert(VT.is128BitVector() && "unexpected type for custom-lowering ISD::MUL");
3785 SDNode *N0 = Op.getOperand(0).getNode();
3786 SDNode *N1 = Op.getOperand(1).getNode();
3787 unsigned NewOpc = 0;
3788 if ((N0->getOpcode() == ISD::SIGN_EXTEND || ISD::isSEXTLoad(N0)) &&
3789 (N1->getOpcode() == ISD::SIGN_EXTEND || ISD::isSEXTLoad(N1))) {
3790 NewOpc = ARMISD::VMULLs;
3791 } else if ((N0->getOpcode() == ISD::ZERO_EXTEND || ISD::isZEXTLoad(N0)) &&
3792 (N1->getOpcode() == ISD::ZERO_EXTEND || ISD::isZEXTLoad(N1))) {
3793 NewOpc = ARMISD::VMULLu;
3794 } else if (VT.getSimpleVT().SimpleTy == MVT::v2i64) {
3795 // Fall through to expand this. It is not legal.
3798 // Other vector multiplications are legal.
3802 // Legalize to a VMULL instruction.
3803 DebugLoc DL = Op.getDebugLoc();
3804 SDValue Op0 = SkipExtension(N0, DAG);
3805 SDValue Op1 = SkipExtension(N1, DAG);
3807 assert(Op0.getValueType().is64BitVector() &&
3808 Op1.getValueType().is64BitVector() &&
3809 "unexpected types for extended operands to VMULL");
3810 return DAG.getNode(NewOpc, DL, VT, Op0, Op1);
3813 SDValue ARMTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
3814 switch (Op.getOpcode()) {
3815 default: llvm_unreachable("Don't know how to custom lower this!");
3816 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
3817 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
3818 case ISD::GlobalAddress:
3819 return Subtarget->isTargetDarwin() ? LowerGlobalAddressDarwin(Op, DAG) :
3820 LowerGlobalAddressELF(Op, DAG);
3821 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
3822 case ISD::SELECT: return LowerSELECT(Op, DAG);
3823 case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
3824 case ISD::BR_CC: return LowerBR_CC(Op, DAG);
3825 case ISD::BR_JT: return LowerBR_JT(Op, DAG);
3826 case ISD::VASTART: return LowerVASTART(Op, DAG);
3827 case ISD::MEMBARRIER: return LowerMEMBARRIER(Op, DAG, Subtarget);
3828 case ISD::SINT_TO_FP:
3829 case ISD::UINT_TO_FP: return LowerINT_TO_FP(Op, DAG);
3830 case ISD::FP_TO_SINT:
3831 case ISD::FP_TO_UINT: return LowerFP_TO_INT(Op, DAG);
3832 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
3833 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
3834 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
3835 case ISD::GLOBAL_OFFSET_TABLE: return LowerGLOBAL_OFFSET_TABLE(Op, DAG);
3836 case ISD::EH_SJLJ_SETJMP: return LowerEH_SJLJ_SETJMP(Op, DAG);
3837 case ISD::EH_SJLJ_LONGJMP: return LowerEH_SJLJ_LONGJMP(Op, DAG);
3838 case ISD::EH_SJLJ_DISPATCHSETUP: return LowerEH_SJLJ_DISPATCHSETUP(Op, DAG);
3839 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG,
3841 case ISD::BIT_CONVERT: return ExpandBIT_CONVERT(Op.getNode(), DAG);
3844 case ISD::SRA: return LowerShift(Op.getNode(), DAG, Subtarget);
3845 case ISD::SHL_PARTS: return LowerShiftLeftParts(Op, DAG);
3846 case ISD::SRL_PARTS:
3847 case ISD::SRA_PARTS: return LowerShiftRightParts(Op, DAG);
3848 case ISD::CTTZ: return LowerCTTZ(Op.getNode(), DAG, Subtarget);
3849 case ISD::VSETCC: return LowerVSETCC(Op, DAG);
3850 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG, Subtarget);
3851 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
3852 case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
3853 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
3854 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
3855 case ISD::MUL: return LowerMUL(Op, DAG);
3860 /// ReplaceNodeResults - Replace the results of node with an illegal result
3861 /// type with new values built out of custom code.
3862 void ARMTargetLowering::ReplaceNodeResults(SDNode *N,
3863 SmallVectorImpl<SDValue>&Results,
3864 SelectionDAG &DAG) const {
3866 switch (N->getOpcode()) {
3868 llvm_unreachable("Don't know how to custom expand this!");
3870 case ISD::BIT_CONVERT:
3871 Res = ExpandBIT_CONVERT(N, DAG);
3875 Res = LowerShift(N, DAG, Subtarget);
3879 Results.push_back(Res);
3882 //===----------------------------------------------------------------------===//
3883 // ARM Scheduler Hooks
3884 //===----------------------------------------------------------------------===//
3887 ARMTargetLowering::EmitAtomicCmpSwap(MachineInstr *MI,
3888 MachineBasicBlock *BB,
3889 unsigned Size) const {
3890 unsigned dest = MI->getOperand(0).getReg();
3891 unsigned ptr = MI->getOperand(1).getReg();
3892 unsigned oldval = MI->getOperand(2).getReg();
3893 unsigned newval = MI->getOperand(3).getReg();
3894 unsigned scratch = BB->getParent()->getRegInfo()
3895 .createVirtualRegister(ARM::GPRRegisterClass);
3896 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
3897 DebugLoc dl = MI->getDebugLoc();
3898 bool isThumb2 = Subtarget->isThumb2();
3900 unsigned ldrOpc, strOpc;
3902 default: llvm_unreachable("unsupported size for AtomicCmpSwap!");
3904 ldrOpc = isThumb2 ? ARM::t2LDREXB : ARM::LDREXB;
3905 strOpc = isThumb2 ? ARM::t2LDREXB : ARM::STREXB;
3908 ldrOpc = isThumb2 ? ARM::t2LDREXH : ARM::LDREXH;
3909 strOpc = isThumb2 ? ARM::t2STREXH : ARM::STREXH;
3912 ldrOpc = isThumb2 ? ARM::t2LDREX : ARM::LDREX;
3913 strOpc = isThumb2 ? ARM::t2STREX : ARM::STREX;
3917 MachineFunction *MF = BB->getParent();
3918 const BasicBlock *LLVM_BB = BB->getBasicBlock();
3919 MachineFunction::iterator It = BB;
3920 ++It; // insert the new blocks after the current block
3922 MachineBasicBlock *loop1MBB = MF->CreateMachineBasicBlock(LLVM_BB);
3923 MachineBasicBlock *loop2MBB = MF->CreateMachineBasicBlock(LLVM_BB);
3924 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
3925 MF->insert(It, loop1MBB);
3926 MF->insert(It, loop2MBB);
3927 MF->insert(It, exitMBB);
3929 // Transfer the remainder of BB and its successor edges to exitMBB.
3930 exitMBB->splice(exitMBB->begin(), BB,
3931 llvm::next(MachineBasicBlock::iterator(MI)),
3933 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
3937 // fallthrough --> loop1MBB
3938 BB->addSuccessor(loop1MBB);
3941 // ldrex dest, [ptr]
3945 AddDefaultPred(BuildMI(BB, dl, TII->get(ldrOpc), dest).addReg(ptr));
3946 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
3947 .addReg(dest).addReg(oldval));
3948 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
3949 .addMBB(exitMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
3950 BB->addSuccessor(loop2MBB);
3951 BB->addSuccessor(exitMBB);
3954 // strex scratch, newval, [ptr]
3958 AddDefaultPred(BuildMI(BB, dl, TII->get(strOpc), scratch).addReg(newval)
3960 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
3961 .addReg(scratch).addImm(0));
3962 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
3963 .addMBB(loop1MBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
3964 BB->addSuccessor(loop1MBB);
3965 BB->addSuccessor(exitMBB);
3971 MI->eraseFromParent(); // The instruction is gone now.
3977 ARMTargetLowering::EmitAtomicBinary(MachineInstr *MI, MachineBasicBlock *BB,
3978 unsigned Size, unsigned BinOpcode) const {
3979 // This also handles ATOMIC_SWAP, indicated by BinOpcode==0.
3980 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
3982 const BasicBlock *LLVM_BB = BB->getBasicBlock();
3983 MachineFunction *MF = BB->getParent();
3984 MachineFunction::iterator It = BB;
3987 unsigned dest = MI->getOperand(0).getReg();
3988 unsigned ptr = MI->getOperand(1).getReg();
3989 unsigned incr = MI->getOperand(2).getReg();
3990 DebugLoc dl = MI->getDebugLoc();
3992 bool isThumb2 = Subtarget->isThumb2();
3993 unsigned ldrOpc, strOpc;
3995 default: llvm_unreachable("unsupported size for AtomicCmpSwap!");
3997 ldrOpc = isThumb2 ? ARM::t2LDREXB : ARM::LDREXB;
3998 strOpc = isThumb2 ? ARM::t2STREXB : ARM::STREXB;
4001 ldrOpc = isThumb2 ? ARM::t2LDREXH : ARM::LDREXH;
4002 strOpc = isThumb2 ? ARM::t2STREXH : ARM::STREXH;
4005 ldrOpc = isThumb2 ? ARM::t2LDREX : ARM::LDREX;
4006 strOpc = isThumb2 ? ARM::t2STREX : ARM::STREX;
4010 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
4011 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
4012 MF->insert(It, loopMBB);
4013 MF->insert(It, exitMBB);
4015 // Transfer the remainder of BB and its successor edges to exitMBB.
4016 exitMBB->splice(exitMBB->begin(), BB,
4017 llvm::next(MachineBasicBlock::iterator(MI)),
4019 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
4021 MachineRegisterInfo &RegInfo = MF->getRegInfo();
4022 unsigned scratch = RegInfo.createVirtualRegister(ARM::GPRRegisterClass);
4023 unsigned scratch2 = (!BinOpcode) ? incr :
4024 RegInfo.createVirtualRegister(ARM::GPRRegisterClass);
4028 // fallthrough --> loopMBB
4029 BB->addSuccessor(loopMBB);
4033 // <binop> scratch2, dest, incr
4034 // strex scratch, scratch2, ptr
4037 // fallthrough --> exitMBB
4039 AddDefaultPred(BuildMI(BB, dl, TII->get(ldrOpc), dest).addReg(ptr));
4041 // operand order needs to go the other way for NAND
4042 if (BinOpcode == ARM::BICrr || BinOpcode == ARM::t2BICrr)
4043 AddDefaultPred(BuildMI(BB, dl, TII->get(BinOpcode), scratch2).
4044 addReg(incr).addReg(dest)).addReg(0);
4046 AddDefaultPred(BuildMI(BB, dl, TII->get(BinOpcode), scratch2).
4047 addReg(dest).addReg(incr)).addReg(0);
4050 AddDefaultPred(BuildMI(BB, dl, TII->get(strOpc), scratch).addReg(scratch2)
4052 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
4053 .addReg(scratch).addImm(0));
4054 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
4055 .addMBB(loopMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
4057 BB->addSuccessor(loopMBB);
4058 BB->addSuccessor(exitMBB);
4064 MI->eraseFromParent(); // The instruction is gone now.
4070 MachineBasicBlock *OtherSucc(MachineBasicBlock *MBB, MachineBasicBlock *Succ) {
4071 for (MachineBasicBlock::succ_iterator I = MBB->succ_begin(),
4072 E = MBB->succ_end(); I != E; ++I)
4075 llvm_unreachable("Expecting a BB with two successors!");
4079 ARMTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
4080 MachineBasicBlock *BB) const {
4081 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
4082 DebugLoc dl = MI->getDebugLoc();
4083 bool isThumb2 = Subtarget->isThumb2();
4084 switch (MI->getOpcode()) {
4087 llvm_unreachable("Unexpected instr type to insert");
4089 case ARM::ATOMIC_LOAD_ADD_I8:
4090 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr);
4091 case ARM::ATOMIC_LOAD_ADD_I16:
4092 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr);
4093 case ARM::ATOMIC_LOAD_ADD_I32:
4094 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr);
4096 case ARM::ATOMIC_LOAD_AND_I8:
4097 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
4098 case ARM::ATOMIC_LOAD_AND_I16:
4099 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
4100 case ARM::ATOMIC_LOAD_AND_I32:
4101 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
4103 case ARM::ATOMIC_LOAD_OR_I8:
4104 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
4105 case ARM::ATOMIC_LOAD_OR_I16:
4106 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
4107 case ARM::ATOMIC_LOAD_OR_I32:
4108 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
4110 case ARM::ATOMIC_LOAD_XOR_I8:
4111 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2EORrr : ARM::EORrr);
4112 case ARM::ATOMIC_LOAD_XOR_I16:
4113 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2EORrr : ARM::EORrr);
4114 case ARM::ATOMIC_LOAD_XOR_I32:
4115 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2EORrr : ARM::EORrr);
4117 case ARM::ATOMIC_LOAD_NAND_I8:
4118 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2BICrr : ARM::BICrr);
4119 case ARM::ATOMIC_LOAD_NAND_I16:
4120 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2BICrr : ARM::BICrr);
4121 case ARM::ATOMIC_LOAD_NAND_I32:
4122 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2BICrr : ARM::BICrr);
4124 case ARM::ATOMIC_LOAD_SUB_I8:
4125 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr);
4126 case ARM::ATOMIC_LOAD_SUB_I16:
4127 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr);
4128 case ARM::ATOMIC_LOAD_SUB_I32:
4129 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr);
4131 case ARM::ATOMIC_SWAP_I8: return EmitAtomicBinary(MI, BB, 1, 0);
4132 case ARM::ATOMIC_SWAP_I16: return EmitAtomicBinary(MI, BB, 2, 0);
4133 case ARM::ATOMIC_SWAP_I32: return EmitAtomicBinary(MI, BB, 4, 0);
4135 case ARM::ATOMIC_CMP_SWAP_I8: return EmitAtomicCmpSwap(MI, BB, 1);
4136 case ARM::ATOMIC_CMP_SWAP_I16: return EmitAtomicCmpSwap(MI, BB, 2);
4137 case ARM::ATOMIC_CMP_SWAP_I32: return EmitAtomicCmpSwap(MI, BB, 4);
4139 case ARM::tMOVCCr_pseudo: {
4140 // To "insert" a SELECT_CC instruction, we actually have to insert the
4141 // diamond control-flow pattern. The incoming instruction knows the
4142 // destination vreg to set, the condition code register to branch on, the
4143 // true/false values to select between, and a branch opcode to use.
4144 const BasicBlock *LLVM_BB = BB->getBasicBlock();
4145 MachineFunction::iterator It = BB;
4151 // cmpTY ccX, r1, r2
4153 // fallthrough --> copy0MBB
4154 MachineBasicBlock *thisMBB = BB;
4155 MachineFunction *F = BB->getParent();
4156 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
4157 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
4158 F->insert(It, copy0MBB);
4159 F->insert(It, sinkMBB);
4161 // Transfer the remainder of BB and its successor edges to sinkMBB.
4162 sinkMBB->splice(sinkMBB->begin(), BB,
4163 llvm::next(MachineBasicBlock::iterator(MI)),
4165 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
4167 BB->addSuccessor(copy0MBB);
4168 BB->addSuccessor(sinkMBB);
4170 BuildMI(BB, dl, TII->get(ARM::tBcc)).addMBB(sinkMBB)
4171 .addImm(MI->getOperand(3).getImm()).addReg(MI->getOperand(4).getReg());
4174 // %FalseValue = ...
4175 // # fallthrough to sinkMBB
4178 // Update machine-CFG edges
4179 BB->addSuccessor(sinkMBB);
4182 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
4185 BuildMI(*BB, BB->begin(), dl,
4186 TII->get(ARM::PHI), MI->getOperand(0).getReg())
4187 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
4188 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
4190 MI->eraseFromParent(); // The pseudo instruction is gone now.
4195 case ARM::BCCZi64: {
4196 // Compare both parts that make up the double comparison separately for
4198 bool RHSisZero = MI->getOpcode() == ARM::BCCZi64;
4200 unsigned LHS1 = MI->getOperand(1).getReg();
4201 unsigned LHS2 = MI->getOperand(2).getReg();
4203 AddDefaultPred(BuildMI(BB, dl,
4204 TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
4205 .addReg(LHS1).addImm(0));
4206 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
4207 .addReg(LHS2).addImm(0)
4208 .addImm(ARMCC::EQ).addReg(ARM::CPSR);
4210 unsigned RHS1 = MI->getOperand(3).getReg();
4211 unsigned RHS2 = MI->getOperand(4).getReg();
4212 AddDefaultPred(BuildMI(BB, dl,
4213 TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
4214 .addReg(LHS1).addReg(RHS1));
4215 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
4216 .addReg(LHS2).addReg(RHS2)
4217 .addImm(ARMCC::EQ).addReg(ARM::CPSR);
4220 MachineBasicBlock *destMBB = MI->getOperand(RHSisZero ? 3 : 5).getMBB();
4221 MachineBasicBlock *exitMBB = OtherSucc(BB, destMBB);
4222 if (MI->getOperand(0).getImm() == ARMCC::NE)
4223 std::swap(destMBB, exitMBB);
4225 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
4226 .addMBB(destMBB).addImm(ARMCC::EQ).addReg(ARM::CPSR);
4227 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2B : ARM::B))
4230 MI->eraseFromParent(); // The pseudo instruction is gone now.
4236 //===----------------------------------------------------------------------===//
4237 // ARM Optimization Hooks
4238 //===----------------------------------------------------------------------===//
4241 SDValue combineSelectAndUse(SDNode *N, SDValue Slct, SDValue OtherOp,
4242 TargetLowering::DAGCombinerInfo &DCI) {
4243 SelectionDAG &DAG = DCI.DAG;
4244 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
4245 EVT VT = N->getValueType(0);
4246 unsigned Opc = N->getOpcode();
4247 bool isSlctCC = Slct.getOpcode() == ISD::SELECT_CC;
4248 SDValue LHS = isSlctCC ? Slct.getOperand(2) : Slct.getOperand(1);
4249 SDValue RHS = isSlctCC ? Slct.getOperand(3) : Slct.getOperand(2);
4250 ISD::CondCode CC = ISD::SETCC_INVALID;
4253 CC = cast<CondCodeSDNode>(Slct.getOperand(4))->get();
4255 SDValue CCOp = Slct.getOperand(0);
4256 if (CCOp.getOpcode() == ISD::SETCC)
4257 CC = cast<CondCodeSDNode>(CCOp.getOperand(2))->get();
4260 bool DoXform = false;
4262 assert ((Opc == ISD::ADD || (Opc == ISD::SUB && Slct == N->getOperand(1))) &&
4265 if (LHS.getOpcode() == ISD::Constant &&
4266 cast<ConstantSDNode>(LHS)->isNullValue()) {
4268 } else if (CC != ISD::SETCC_INVALID &&
4269 RHS.getOpcode() == ISD::Constant &&
4270 cast<ConstantSDNode>(RHS)->isNullValue()) {
4271 std::swap(LHS, RHS);
4272 SDValue Op0 = Slct.getOperand(0);
4273 EVT OpVT = isSlctCC ? Op0.getValueType() :
4274 Op0.getOperand(0).getValueType();
4275 bool isInt = OpVT.isInteger();
4276 CC = ISD::getSetCCInverse(CC, isInt);
4278 if (!TLI.isCondCodeLegal(CC, OpVT))
4279 return SDValue(); // Inverse operator isn't legal.
4286 SDValue Result = DAG.getNode(Opc, RHS.getDebugLoc(), VT, OtherOp, RHS);
4288 return DAG.getSelectCC(N->getDebugLoc(), OtherOp, Result,
4289 Slct.getOperand(0), Slct.getOperand(1), CC);
4290 SDValue CCOp = Slct.getOperand(0);
4292 CCOp = DAG.getSetCC(Slct.getDebugLoc(), CCOp.getValueType(),
4293 CCOp.getOperand(0), CCOp.getOperand(1), CC);
4294 return DAG.getNode(ISD::SELECT, N->getDebugLoc(), VT,
4295 CCOp, OtherOp, Result);
4300 /// PerformADDCombineWithOperands - Try DAG combinations for an ADD with
4301 /// operands N0 and N1. This is a helper for PerformADDCombine that is
4302 /// called with the default operands, and if that fails, with commuted
4304 static SDValue PerformADDCombineWithOperands(SDNode *N, SDValue N0, SDValue N1,
4305 TargetLowering::DAGCombinerInfo &DCI) {
4306 // fold (add (select cc, 0, c), x) -> (select cc, x, (add, x, c))
4307 if (N0.getOpcode() == ISD::SELECT && N0.getNode()->hasOneUse()) {
4308 SDValue Result = combineSelectAndUse(N, N0, N1, DCI);
4309 if (Result.getNode()) return Result;
4314 /// PerformADDCombine - Target-specific dag combine xforms for ISD::ADD.
4316 static SDValue PerformADDCombine(SDNode *N,
4317 TargetLowering::DAGCombinerInfo &DCI) {
4318 SDValue N0 = N->getOperand(0);
4319 SDValue N1 = N->getOperand(1);
4321 // First try with the default operand order.
4322 SDValue Result = PerformADDCombineWithOperands(N, N0, N1, DCI);
4323 if (Result.getNode())
4326 // If that didn't work, try again with the operands commuted.
4327 return PerformADDCombineWithOperands(N, N1, N0, DCI);
4330 /// PerformSUBCombine - Target-specific dag combine xforms for ISD::SUB.
4332 static SDValue PerformSUBCombine(SDNode *N,
4333 TargetLowering::DAGCombinerInfo &DCI) {
4334 SDValue N0 = N->getOperand(0);
4335 SDValue N1 = N->getOperand(1);
4337 // fold (sub x, (select cc, 0, c)) -> (select cc, x, (sub, x, c))
4338 if (N1.getOpcode() == ISD::SELECT && N1.getNode()->hasOneUse()) {
4339 SDValue Result = combineSelectAndUse(N, N1, N0, DCI);
4340 if (Result.getNode()) return Result;
4346 static SDValue PerformMULCombine(SDNode *N,
4347 TargetLowering::DAGCombinerInfo &DCI,
4348 const ARMSubtarget *Subtarget) {
4349 SelectionDAG &DAG = DCI.DAG;
4351 if (Subtarget->isThumb1Only())
4354 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
4357 EVT VT = N->getValueType(0);
4361 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1));
4365 uint64_t MulAmt = C->getZExtValue();
4366 unsigned ShiftAmt = CountTrailingZeros_64(MulAmt);
4367 ShiftAmt = ShiftAmt & (32 - 1);
4368 SDValue V = N->getOperand(0);
4369 DebugLoc DL = N->getDebugLoc();
4372 MulAmt >>= ShiftAmt;
4373 if (isPowerOf2_32(MulAmt - 1)) {
4374 // (mul x, 2^N + 1) => (add (shl x, N), x)
4375 Res = DAG.getNode(ISD::ADD, DL, VT,
4376 V, DAG.getNode(ISD::SHL, DL, VT,
4377 V, DAG.getConstant(Log2_32(MulAmt-1),
4379 } else if (isPowerOf2_32(MulAmt + 1)) {
4380 // (mul x, 2^N - 1) => (sub (shl x, N), x)
4381 Res = DAG.getNode(ISD::SUB, DL, VT,
4382 DAG.getNode(ISD::SHL, DL, VT,
4383 V, DAG.getConstant(Log2_32(MulAmt+1),
4390 Res = DAG.getNode(ISD::SHL, DL, VT, Res,
4391 DAG.getConstant(ShiftAmt, MVT::i32));
4393 // Do not add new nodes to DAG combiner worklist.
4394 DCI.CombineTo(N, Res, false);
4398 /// PerformORCombine - Target-specific dag combine xforms for ISD::OR
4399 static SDValue PerformORCombine(SDNode *N,
4400 TargetLowering::DAGCombinerInfo &DCI,
4401 const ARMSubtarget *Subtarget) {
4402 // Try to use the ARM/Thumb2 BFI (bitfield insert) instruction when
4405 // BFI is only available on V6T2+
4406 if (Subtarget->isThumb1Only() || !Subtarget->hasV6T2Ops())
4409 SelectionDAG &DAG = DCI.DAG;
4410 SDValue N0 = N->getOperand(0), N1 = N->getOperand(1);
4411 DebugLoc DL = N->getDebugLoc();
4412 // 1) or (and A, mask), val => ARMbfi A, val, mask
4413 // iff (val & mask) == val
4415 // 2) or (and A, mask), (and B, mask2) => ARMbfi A, (lsr B, amt), mask
4416 // 2a) iff isBitFieldInvertedMask(mask) && isBitFieldInvertedMask(~mask2)
4417 // && CountPopulation_32(mask) == CountPopulation_32(~mask2)
4418 // 2b) iff isBitFieldInvertedMask(~mask) && isBitFieldInvertedMask(mask2)
4419 // && CountPopulation_32(mask) == CountPopulation_32(~mask2)
4420 // (i.e., copy a bitfield value into another bitfield of the same width)
4421 if (N0.getOpcode() != ISD::AND)
4424 EVT VT = N->getValueType(0);
4429 // The value and the mask need to be constants so we can verify this is
4430 // actually a bitfield set. If the mask is 0xffff, we can do better
4431 // via a movt instruction, so don't use BFI in that case.
4432 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N0.getOperand(1));
4435 unsigned Mask = C->getZExtValue();
4439 // Case (1): or (and A, mask), val => ARMbfi A, val, mask
4440 if ((C = dyn_cast<ConstantSDNode>(N1))) {
4441 unsigned Val = C->getZExtValue();
4442 if (!ARM::isBitFieldInvertedMask(Mask) || (Val & ~Mask) != Val)
4444 Val >>= CountTrailingZeros_32(~Mask);
4446 Res = DAG.getNode(ARMISD::BFI, DL, VT, N0.getOperand(0),
4447 DAG.getConstant(Val, MVT::i32),
4448 DAG.getConstant(Mask, MVT::i32));
4450 // Do not add new nodes to DAG combiner worklist.
4451 DCI.CombineTo(N, Res, false);
4452 } else if (N1.getOpcode() == ISD::AND) {
4453 // case (2) or (and A, mask), (and B, mask2) => ARMbfi A, (lsr B, amt), mask
4454 C = dyn_cast<ConstantSDNode>(N1.getOperand(1));
4457 unsigned Mask2 = C->getZExtValue();
4459 if (ARM::isBitFieldInvertedMask(Mask) &&
4460 ARM::isBitFieldInvertedMask(~Mask2) &&
4461 (CountPopulation_32(Mask) == CountPopulation_32(~Mask2))) {
4462 // The pack halfword instruction works better for masks that fit it,
4463 // so use that when it's available.
4464 if (Subtarget->hasT2ExtractPack() &&
4465 (Mask == 0xffff || Mask == 0xffff0000))
4468 unsigned lsb = CountTrailingZeros_32(Mask2);
4469 Res = DAG.getNode(ISD::SRL, DL, VT, N1.getOperand(0),
4470 DAG.getConstant(lsb, MVT::i32));
4471 Res = DAG.getNode(ARMISD::BFI, DL, VT, N0.getOperand(0), Res,
4472 DAG.getConstant(Mask, MVT::i32));
4473 // Do not add new nodes to DAG combiner worklist.
4474 DCI.CombineTo(N, Res, false);
4475 } else if (ARM::isBitFieldInvertedMask(~Mask) &&
4476 ARM::isBitFieldInvertedMask(Mask2) &&
4477 (CountPopulation_32(~Mask) == CountPopulation_32(Mask2))) {
4478 // The pack halfword instruction works better for masks that fit it,
4479 // so use that when it's available.
4480 if (Subtarget->hasT2ExtractPack() &&
4481 (Mask2 == 0xffff || Mask2 == 0xffff0000))
4484 unsigned lsb = CountTrailingZeros_32(Mask);
4485 Res = DAG.getNode(ISD::SRL, DL, VT, N0.getOperand(0),
4486 DAG.getConstant(lsb, MVT::i32));
4487 Res = DAG.getNode(ARMISD::BFI, DL, VT, N1.getOperand(0), Res,
4488 DAG.getConstant(Mask2, MVT::i32));
4489 // Do not add new nodes to DAG combiner worklist.
4490 DCI.CombineTo(N, Res, false);
4497 /// PerformVMOVRRDCombine - Target-specific dag combine xforms for
4498 /// ARMISD::VMOVRRD.
4499 static SDValue PerformVMOVRRDCombine(SDNode *N,
4500 TargetLowering::DAGCombinerInfo &DCI) {
4501 // vmovrrd(vmovdrr x, y) -> x,y
4502 SDValue InDouble = N->getOperand(0);
4503 if (InDouble.getOpcode() == ARMISD::VMOVDRR)
4504 return DCI.CombineTo(N, InDouble.getOperand(0), InDouble.getOperand(1));
4508 /// PerformVMOVDRRCombine - Target-specific dag combine xforms for
4509 /// ARMISD::VMOVDRR. This is also used for BUILD_VECTORs with 2 operands.
4510 static SDValue PerformVMOVDRRCombine(SDNode *N, SelectionDAG &DAG) {
4511 // N=vmovrrd(X); vmovdrr(N:0, N:1) -> bit_convert(X)
4512 SDValue Op0 = N->getOperand(0);
4513 SDValue Op1 = N->getOperand(1);
4514 if (Op0.getOpcode() == ISD::BIT_CONVERT)
4515 Op0 = Op0.getOperand(0);
4516 if (Op1.getOpcode() == ISD::BIT_CONVERT)
4517 Op1 = Op1.getOperand(0);
4518 if (Op0.getOpcode() == ARMISD::VMOVRRD &&
4519 Op0.getNode() == Op1.getNode() &&
4520 Op0.getResNo() == 0 && Op1.getResNo() == 1)
4521 return DAG.getNode(ISD::BIT_CONVERT, N->getDebugLoc(),
4522 N->getValueType(0), Op0.getOperand(0));
4526 /// PerformBUILD_VECTORCombine - Target-specific dag combine xforms for
4527 /// ISD::BUILD_VECTOR.
4528 static SDValue PerformBUILD_VECTORCombine(SDNode *N, SelectionDAG &DAG) {
4529 // build_vector(N=ARMISD::VMOVRRD(X), N:1) -> bit_convert(X):
4530 // VMOVRRD is introduced when legalizing i64 types. It forces the i64 value
4531 // into a pair of GPRs, which is fine when the value is used as a scalar,
4532 // but if the i64 value is converted to a vector, we need to undo the VMOVRRD.
4533 if (N->getNumOperands() == 2)
4534 return PerformVMOVDRRCombine(N, DAG);
4539 /// PerformVECTOR_SHUFFLECombine - Target-specific dag combine xforms for
4540 /// ISD::VECTOR_SHUFFLE.
4541 static SDValue PerformVECTOR_SHUFFLECombine(SDNode *N, SelectionDAG &DAG) {
4542 // The LLVM shufflevector instruction does not require the shuffle mask
4543 // length to match the operand vector length, but ISD::VECTOR_SHUFFLE does
4544 // have that requirement. When translating to ISD::VECTOR_SHUFFLE, if the
4545 // operands do not match the mask length, they are extended by concatenating
4546 // them with undef vectors. That is probably the right thing for other
4547 // targets, but for NEON it is better to concatenate two double-register
4548 // size vector operands into a single quad-register size vector. Do that
4549 // transformation here:
4550 // shuffle(concat(v1, undef), concat(v2, undef)) ->
4551 // shuffle(concat(v1, v2), undef)
4552 SDValue Op0 = N->getOperand(0);
4553 SDValue Op1 = N->getOperand(1);
4554 if (Op0.getOpcode() != ISD::CONCAT_VECTORS ||
4555 Op1.getOpcode() != ISD::CONCAT_VECTORS ||
4556 Op0.getNumOperands() != 2 ||
4557 Op1.getNumOperands() != 2)
4559 SDValue Concat0Op1 = Op0.getOperand(1);
4560 SDValue Concat1Op1 = Op1.getOperand(1);
4561 if (Concat0Op1.getOpcode() != ISD::UNDEF ||
4562 Concat1Op1.getOpcode() != ISD::UNDEF)
4564 // Skip the transformation if any of the types are illegal.
4565 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
4566 EVT VT = N->getValueType(0);
4567 if (!TLI.isTypeLegal(VT) ||
4568 !TLI.isTypeLegal(Concat0Op1.getValueType()) ||
4569 !TLI.isTypeLegal(Concat1Op1.getValueType()))
4572 SDValue NewConcat = DAG.getNode(ISD::CONCAT_VECTORS, N->getDebugLoc(), VT,
4573 Op0.getOperand(0), Op1.getOperand(0));
4574 // Translate the shuffle mask.
4575 SmallVector<int, 16> NewMask;
4576 unsigned NumElts = VT.getVectorNumElements();
4577 unsigned HalfElts = NumElts/2;
4578 ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(N);
4579 for (unsigned n = 0; n < NumElts; ++n) {
4580 int MaskElt = SVN->getMaskElt(n);
4582 if (MaskElt < (int)HalfElts)
4584 else if (MaskElt >= (int)NumElts && MaskElt < (int)(NumElts + HalfElts))
4585 NewElt = HalfElts + MaskElt - NumElts;
4586 NewMask.push_back(NewElt);
4588 return DAG.getVectorShuffle(VT, N->getDebugLoc(), NewConcat,
4589 DAG.getUNDEF(VT), NewMask.data());
4592 /// PerformVDUPLANECombine - Target-specific dag combine xforms for
4593 /// ARMISD::VDUPLANE.
4594 static SDValue PerformVDUPLANECombine(SDNode *N, SelectionDAG &DAG) {
4595 // If the source is already a VMOVIMM or VMVNIMM splat, the VDUPLANE is
4597 SDValue Op = N->getOperand(0);
4598 EVT VT = N->getValueType(0);
4600 // Ignore bit_converts.
4601 while (Op.getOpcode() == ISD::BIT_CONVERT)
4602 Op = Op.getOperand(0);
4603 if (Op.getOpcode() != ARMISD::VMOVIMM && Op.getOpcode() != ARMISD::VMVNIMM)
4606 // Make sure the VMOV element size is not bigger than the VDUPLANE elements.
4607 unsigned EltSize = Op.getValueType().getVectorElementType().getSizeInBits();
4608 // The canonical VMOV for a zero vector uses a 32-bit element size.
4609 unsigned Imm = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
4611 if (ARM_AM::decodeNEONModImm(Imm, EltBits) == 0)
4613 if (EltSize > VT.getVectorElementType().getSizeInBits())
4616 return DAG.getNode(ISD::BIT_CONVERT, N->getDebugLoc(), VT, Op);
4619 /// getVShiftImm - Check if this is a valid build_vector for the immediate
4620 /// operand of a vector shift operation, where all the elements of the
4621 /// build_vector must have the same constant integer value.
4622 static bool getVShiftImm(SDValue Op, unsigned ElementBits, int64_t &Cnt) {
4623 // Ignore bit_converts.
4624 while (Op.getOpcode() == ISD::BIT_CONVERT)
4625 Op = Op.getOperand(0);
4626 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(Op.getNode());
4627 APInt SplatBits, SplatUndef;
4628 unsigned SplatBitSize;
4630 if (! BVN || ! BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize,
4631 HasAnyUndefs, ElementBits) ||
4632 SplatBitSize > ElementBits)
4634 Cnt = SplatBits.getSExtValue();
4638 /// isVShiftLImm - Check if this is a valid build_vector for the immediate
4639 /// operand of a vector shift left operation. That value must be in the range:
4640 /// 0 <= Value < ElementBits for a left shift; or
4641 /// 0 <= Value <= ElementBits for a long left shift.
4642 static bool isVShiftLImm(SDValue Op, EVT VT, bool isLong, int64_t &Cnt) {
4643 assert(VT.isVector() && "vector shift count is not a vector type");
4644 unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
4645 if (! getVShiftImm(Op, ElementBits, Cnt))
4647 return (Cnt >= 0 && (isLong ? Cnt-1 : Cnt) < ElementBits);
4650 /// isVShiftRImm - Check if this is a valid build_vector for the immediate
4651 /// operand of a vector shift right operation. For a shift opcode, the value
4652 /// is positive, but for an intrinsic the value count must be negative. The
4653 /// absolute value must be in the range:
4654 /// 1 <= |Value| <= ElementBits for a right shift; or
4655 /// 1 <= |Value| <= ElementBits/2 for a narrow right shift.
4656 static bool isVShiftRImm(SDValue Op, EVT VT, bool isNarrow, bool isIntrinsic,
4658 assert(VT.isVector() && "vector shift count is not a vector type");
4659 unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
4660 if (! getVShiftImm(Op, ElementBits, Cnt))
4664 return (Cnt >= 1 && Cnt <= (isNarrow ? ElementBits/2 : ElementBits));
4667 /// PerformIntrinsicCombine - ARM-specific DAG combining for intrinsics.
4668 static SDValue PerformIntrinsicCombine(SDNode *N, SelectionDAG &DAG) {
4669 unsigned IntNo = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue();
4672 // Don't do anything for most intrinsics.
4675 // Vector shifts: check for immediate versions and lower them.
4676 // Note: This is done during DAG combining instead of DAG legalizing because
4677 // the build_vectors for 64-bit vector element shift counts are generally
4678 // not legal, and it is hard to see their values after they get legalized to
4679 // loads from a constant pool.
4680 case Intrinsic::arm_neon_vshifts:
4681 case Intrinsic::arm_neon_vshiftu:
4682 case Intrinsic::arm_neon_vshiftls:
4683 case Intrinsic::arm_neon_vshiftlu:
4684 case Intrinsic::arm_neon_vshiftn:
4685 case Intrinsic::arm_neon_vrshifts:
4686 case Intrinsic::arm_neon_vrshiftu:
4687 case Intrinsic::arm_neon_vrshiftn:
4688 case Intrinsic::arm_neon_vqshifts:
4689 case Intrinsic::arm_neon_vqshiftu:
4690 case Intrinsic::arm_neon_vqshiftsu:
4691 case Intrinsic::arm_neon_vqshiftns:
4692 case Intrinsic::arm_neon_vqshiftnu:
4693 case Intrinsic::arm_neon_vqshiftnsu:
4694 case Intrinsic::arm_neon_vqrshiftns:
4695 case Intrinsic::arm_neon_vqrshiftnu:
4696 case Intrinsic::arm_neon_vqrshiftnsu: {
4697 EVT VT = N->getOperand(1).getValueType();
4699 unsigned VShiftOpc = 0;
4702 case Intrinsic::arm_neon_vshifts:
4703 case Intrinsic::arm_neon_vshiftu:
4704 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt)) {
4705 VShiftOpc = ARMISD::VSHL;
4708 if (isVShiftRImm(N->getOperand(2), VT, false, true, Cnt)) {
4709 VShiftOpc = (IntNo == Intrinsic::arm_neon_vshifts ?
4710 ARMISD::VSHRs : ARMISD::VSHRu);
4715 case Intrinsic::arm_neon_vshiftls:
4716 case Intrinsic::arm_neon_vshiftlu:
4717 if (isVShiftLImm(N->getOperand(2), VT, true, Cnt))
4719 llvm_unreachable("invalid shift count for vshll intrinsic");
4721 case Intrinsic::arm_neon_vrshifts:
4722 case Intrinsic::arm_neon_vrshiftu:
4723 if (isVShiftRImm(N->getOperand(2), VT, false, true, Cnt))
4727 case Intrinsic::arm_neon_vqshifts:
4728 case Intrinsic::arm_neon_vqshiftu:
4729 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt))
4733 case Intrinsic::arm_neon_vqshiftsu:
4734 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt))
4736 llvm_unreachable("invalid shift count for vqshlu intrinsic");
4738 case Intrinsic::arm_neon_vshiftn:
4739 case Intrinsic::arm_neon_vrshiftn:
4740 case Intrinsic::arm_neon_vqshiftns:
4741 case Intrinsic::arm_neon_vqshiftnu:
4742 case Intrinsic::arm_neon_vqshiftnsu:
4743 case Intrinsic::arm_neon_vqrshiftns:
4744 case Intrinsic::arm_neon_vqrshiftnu:
4745 case Intrinsic::arm_neon_vqrshiftnsu:
4746 // Narrowing shifts require an immediate right shift.
4747 if (isVShiftRImm(N->getOperand(2), VT, true, true, Cnt))
4749 llvm_unreachable("invalid shift count for narrowing vector shift "
4753 llvm_unreachable("unhandled vector shift");
4757 case Intrinsic::arm_neon_vshifts:
4758 case Intrinsic::arm_neon_vshiftu:
4759 // Opcode already set above.
4761 case Intrinsic::arm_neon_vshiftls:
4762 case Intrinsic::arm_neon_vshiftlu:
4763 if (Cnt == VT.getVectorElementType().getSizeInBits())
4764 VShiftOpc = ARMISD::VSHLLi;
4766 VShiftOpc = (IntNo == Intrinsic::arm_neon_vshiftls ?
4767 ARMISD::VSHLLs : ARMISD::VSHLLu);
4769 case Intrinsic::arm_neon_vshiftn:
4770 VShiftOpc = ARMISD::VSHRN; break;
4771 case Intrinsic::arm_neon_vrshifts:
4772 VShiftOpc = ARMISD::VRSHRs; break;
4773 case Intrinsic::arm_neon_vrshiftu:
4774 VShiftOpc = ARMISD::VRSHRu; break;
4775 case Intrinsic::arm_neon_vrshiftn:
4776 VShiftOpc = ARMISD::VRSHRN; break;
4777 case Intrinsic::arm_neon_vqshifts:
4778 VShiftOpc = ARMISD::VQSHLs; break;
4779 case Intrinsic::arm_neon_vqshiftu:
4780 VShiftOpc = ARMISD::VQSHLu; break;
4781 case Intrinsic::arm_neon_vqshiftsu:
4782 VShiftOpc = ARMISD::VQSHLsu; break;
4783 case Intrinsic::arm_neon_vqshiftns:
4784 VShiftOpc = ARMISD::VQSHRNs; break;
4785 case Intrinsic::arm_neon_vqshiftnu:
4786 VShiftOpc = ARMISD::VQSHRNu; break;
4787 case Intrinsic::arm_neon_vqshiftnsu:
4788 VShiftOpc = ARMISD::VQSHRNsu; break;
4789 case Intrinsic::arm_neon_vqrshiftns:
4790 VShiftOpc = ARMISD::VQRSHRNs; break;
4791 case Intrinsic::arm_neon_vqrshiftnu:
4792 VShiftOpc = ARMISD::VQRSHRNu; break;
4793 case Intrinsic::arm_neon_vqrshiftnsu:
4794 VShiftOpc = ARMISD::VQRSHRNsu; break;
4797 return DAG.getNode(VShiftOpc, N->getDebugLoc(), N->getValueType(0),
4798 N->getOperand(1), DAG.getConstant(Cnt, MVT::i32));
4801 case Intrinsic::arm_neon_vshiftins: {
4802 EVT VT = N->getOperand(1).getValueType();
4804 unsigned VShiftOpc = 0;
4806 if (isVShiftLImm(N->getOperand(3), VT, false, Cnt))
4807 VShiftOpc = ARMISD::VSLI;
4808 else if (isVShiftRImm(N->getOperand(3), VT, false, true, Cnt))
4809 VShiftOpc = ARMISD::VSRI;
4811 llvm_unreachable("invalid shift count for vsli/vsri intrinsic");
4814 return DAG.getNode(VShiftOpc, N->getDebugLoc(), N->getValueType(0),
4815 N->getOperand(1), N->getOperand(2),
4816 DAG.getConstant(Cnt, MVT::i32));
4819 case Intrinsic::arm_neon_vqrshifts:
4820 case Intrinsic::arm_neon_vqrshiftu:
4821 // No immediate versions of these to check for.
4828 /// PerformShiftCombine - Checks for immediate versions of vector shifts and
4829 /// lowers them. As with the vector shift intrinsics, this is done during DAG
4830 /// combining instead of DAG legalizing because the build_vectors for 64-bit
4831 /// vector element shift counts are generally not legal, and it is hard to see
4832 /// their values after they get legalized to loads from a constant pool.
4833 static SDValue PerformShiftCombine(SDNode *N, SelectionDAG &DAG,
4834 const ARMSubtarget *ST) {
4835 EVT VT = N->getValueType(0);
4837 // Nothing to be done for scalar shifts.
4838 if (! VT.isVector())
4841 assert(ST->hasNEON() && "unexpected vector shift");
4844 switch (N->getOpcode()) {
4845 default: llvm_unreachable("unexpected shift opcode");
4848 if (isVShiftLImm(N->getOperand(1), VT, false, Cnt))
4849 return DAG.getNode(ARMISD::VSHL, N->getDebugLoc(), VT, N->getOperand(0),
4850 DAG.getConstant(Cnt, MVT::i32));
4855 if (isVShiftRImm(N->getOperand(1), VT, false, false, Cnt)) {
4856 unsigned VShiftOpc = (N->getOpcode() == ISD::SRA ?
4857 ARMISD::VSHRs : ARMISD::VSHRu);
4858 return DAG.getNode(VShiftOpc, N->getDebugLoc(), VT, N->getOperand(0),
4859 DAG.getConstant(Cnt, MVT::i32));
4865 /// PerformExtendCombine - Target-specific DAG combining for ISD::SIGN_EXTEND,
4866 /// ISD::ZERO_EXTEND, and ISD::ANY_EXTEND.
4867 static SDValue PerformExtendCombine(SDNode *N, SelectionDAG &DAG,
4868 const ARMSubtarget *ST) {
4869 SDValue N0 = N->getOperand(0);
4871 // Check for sign- and zero-extensions of vector extract operations of 8-
4872 // and 16-bit vector elements. NEON supports these directly. They are
4873 // handled during DAG combining because type legalization will promote them
4874 // to 32-bit types and it is messy to recognize the operations after that.
4875 if (ST->hasNEON() && N0.getOpcode() == ISD::EXTRACT_VECTOR_ELT) {
4876 SDValue Vec = N0.getOperand(0);
4877 SDValue Lane = N0.getOperand(1);
4878 EVT VT = N->getValueType(0);
4879 EVT EltVT = N0.getValueType();
4880 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
4882 if (VT == MVT::i32 &&
4883 (EltVT == MVT::i8 || EltVT == MVT::i16) &&
4884 TLI.isTypeLegal(Vec.getValueType())) {
4887 switch (N->getOpcode()) {
4888 default: llvm_unreachable("unexpected opcode");
4889 case ISD::SIGN_EXTEND:
4890 Opc = ARMISD::VGETLANEs;
4892 case ISD::ZERO_EXTEND:
4893 case ISD::ANY_EXTEND:
4894 Opc = ARMISD::VGETLANEu;
4897 return DAG.getNode(Opc, N->getDebugLoc(), VT, Vec, Lane);
4904 /// PerformSELECT_CCCombine - Target-specific DAG combining for ISD::SELECT_CC
4905 /// to match f32 max/min patterns to use NEON vmax/vmin instructions.
4906 static SDValue PerformSELECT_CCCombine(SDNode *N, SelectionDAG &DAG,
4907 const ARMSubtarget *ST) {
4908 // If the target supports NEON, try to use vmax/vmin instructions for f32
4909 // selects like "x < y ? x : y". Unless the NoNaNsFPMath option is set,
4910 // be careful about NaNs: NEON's vmax/vmin return NaN if either operand is
4911 // a NaN; only do the transformation when it matches that behavior.
4913 // For now only do this when using NEON for FP operations; if using VFP, it
4914 // is not obvious that the benefit outweighs the cost of switching to the
4916 if (!ST->hasNEON() || !ST->useNEONForSinglePrecisionFP() ||
4917 N->getValueType(0) != MVT::f32)
4920 SDValue CondLHS = N->getOperand(0);
4921 SDValue CondRHS = N->getOperand(1);
4922 SDValue LHS = N->getOperand(2);
4923 SDValue RHS = N->getOperand(3);
4924 ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(4))->get();
4926 unsigned Opcode = 0;
4928 if (DAG.isEqualTo(LHS, CondLHS) && DAG.isEqualTo(RHS, CondRHS)) {
4929 IsReversed = false; // x CC y ? x : y
4930 } else if (DAG.isEqualTo(LHS, CondRHS) && DAG.isEqualTo(RHS, CondLHS)) {
4931 IsReversed = true ; // x CC y ? y : x
4945 // If LHS is NaN, an ordered comparison will be false and the result will
4946 // be the RHS, but vmin(NaN, RHS) = NaN. Avoid this by checking that LHS
4947 // != NaN. Likewise, for unordered comparisons, check for RHS != NaN.
4948 IsUnordered = (CC == ISD::SETULT || CC == ISD::SETULE);
4949 if (!DAG.isKnownNeverNaN(IsUnordered ? RHS : LHS))
4951 // For less-than-or-equal comparisons, "+0 <= -0" will be true but vmin
4952 // will return -0, so vmin can only be used for unsafe math or if one of
4953 // the operands is known to be nonzero.
4954 if ((CC == ISD::SETLE || CC == ISD::SETOLE || CC == ISD::SETULE) &&
4956 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
4958 Opcode = IsReversed ? ARMISD::FMAX : ARMISD::FMIN;
4967 // If LHS is NaN, an ordered comparison will be false and the result will
4968 // be the RHS, but vmax(NaN, RHS) = NaN. Avoid this by checking that LHS
4969 // != NaN. Likewise, for unordered comparisons, check for RHS != NaN.
4970 IsUnordered = (CC == ISD::SETUGT || CC == ISD::SETUGE);
4971 if (!DAG.isKnownNeverNaN(IsUnordered ? RHS : LHS))
4973 // For greater-than-or-equal comparisons, "-0 >= +0" will be true but vmax
4974 // will return +0, so vmax can only be used for unsafe math or if one of
4975 // the operands is known to be nonzero.
4976 if ((CC == ISD::SETGE || CC == ISD::SETOGE || CC == ISD::SETUGE) &&
4978 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
4980 Opcode = IsReversed ? ARMISD::FMIN : ARMISD::FMAX;
4986 return DAG.getNode(Opcode, N->getDebugLoc(), N->getValueType(0), LHS, RHS);
4989 SDValue ARMTargetLowering::PerformDAGCombine(SDNode *N,
4990 DAGCombinerInfo &DCI) const {
4991 switch (N->getOpcode()) {
4993 case ISD::ADD: return PerformADDCombine(N, DCI);
4994 case ISD::SUB: return PerformSUBCombine(N, DCI);
4995 case ISD::MUL: return PerformMULCombine(N, DCI, Subtarget);
4996 case ISD::OR: return PerformORCombine(N, DCI, Subtarget);
4997 case ARMISD::VMOVRRD: return PerformVMOVRRDCombine(N, DCI);
4998 case ARMISD::VMOVDRR: return PerformVMOVDRRCombine(N, DCI.DAG);
4999 case ISD::BUILD_VECTOR: return PerformBUILD_VECTORCombine(N, DCI.DAG);
5000 case ISD::VECTOR_SHUFFLE: return PerformVECTOR_SHUFFLECombine(N, DCI.DAG);
5001 case ARMISD::VDUPLANE: return PerformVDUPLANECombine(N, DCI.DAG);
5002 case ISD::INTRINSIC_WO_CHAIN: return PerformIntrinsicCombine(N, DCI.DAG);
5005 case ISD::SRL: return PerformShiftCombine(N, DCI.DAG, Subtarget);
5006 case ISD::SIGN_EXTEND:
5007 case ISD::ZERO_EXTEND:
5008 case ISD::ANY_EXTEND: return PerformExtendCombine(N, DCI.DAG, Subtarget);
5009 case ISD::SELECT_CC: return PerformSELECT_CCCombine(N, DCI.DAG, Subtarget);
5014 bool ARMTargetLowering::allowsUnalignedMemoryAccesses(EVT VT) const {
5015 if (!Subtarget->allowsUnalignedMem())
5018 switch (VT.getSimpleVT().SimpleTy) {
5025 // FIXME: VLD1 etc with standard alignment is legal.
5029 static bool isLegalT1AddressImmediate(int64_t V, EVT VT) {
5034 switch (VT.getSimpleVT().SimpleTy) {
5035 default: return false;
5050 if ((V & (Scale - 1)) != 0)
5053 return V == (V & ((1LL << 5) - 1));
5056 static bool isLegalT2AddressImmediate(int64_t V, EVT VT,
5057 const ARMSubtarget *Subtarget) {
5064 switch (VT.getSimpleVT().SimpleTy) {
5065 default: return false;
5070 // + imm12 or - imm8
5072 return V == (V & ((1LL << 8) - 1));
5073 return V == (V & ((1LL << 12) - 1));
5076 // Same as ARM mode. FIXME: NEON?
5077 if (!Subtarget->hasVFP2())
5082 return V == (V & ((1LL << 8) - 1));
5086 /// isLegalAddressImmediate - Return true if the integer value can be used
5087 /// as the offset of the target addressing mode for load / store of the
5089 static bool isLegalAddressImmediate(int64_t V, EVT VT,
5090 const ARMSubtarget *Subtarget) {
5097 if (Subtarget->isThumb1Only())
5098 return isLegalT1AddressImmediate(V, VT);
5099 else if (Subtarget->isThumb2())
5100 return isLegalT2AddressImmediate(V, VT, Subtarget);
5105 switch (VT.getSimpleVT().SimpleTy) {
5106 default: return false;
5111 return V == (V & ((1LL << 12) - 1));
5114 return V == (V & ((1LL << 8) - 1));
5117 if (!Subtarget->hasVFP2()) // FIXME: NEON?
5122 return V == (V & ((1LL << 8) - 1));
5126 bool ARMTargetLowering::isLegalT2ScaledAddressingMode(const AddrMode &AM,
5128 int Scale = AM.Scale;
5132 switch (VT.getSimpleVT().SimpleTy) {
5133 default: return false;
5142 return Scale == 2 || Scale == 4 || Scale == 8;
5145 if (((unsigned)AM.HasBaseReg + Scale) <= 2)
5149 // Note, we allow "void" uses (basically, uses that aren't loads or
5150 // stores), because arm allows folding a scale into many arithmetic
5151 // operations. This should be made more precise and revisited later.
5153 // Allow r << imm, but the imm has to be a multiple of two.
5154 if (Scale & 1) return false;
5155 return isPowerOf2_32(Scale);
5159 /// isLegalAddressingMode - Return true if the addressing mode represented
5160 /// by AM is legal for this target, for a load/store of the specified type.
5161 bool ARMTargetLowering::isLegalAddressingMode(const AddrMode &AM,
5162 const Type *Ty) const {
5163 EVT VT = getValueType(Ty, true);
5164 if (!isLegalAddressImmediate(AM.BaseOffs, VT, Subtarget))
5167 // Can never fold addr of global into load/store.
5172 case 0: // no scale reg, must be "r+i" or "r", or "i".
5175 if (Subtarget->isThumb1Only())
5179 // ARM doesn't support any R+R*scale+imm addr modes.
5186 if (Subtarget->isThumb2())
5187 return isLegalT2ScaledAddressingMode(AM, VT);
5189 int Scale = AM.Scale;
5190 switch (VT.getSimpleVT().SimpleTy) {
5191 default: return false;
5195 if (Scale < 0) Scale = -Scale;
5199 return isPowerOf2_32(Scale & ~1);
5203 if (((unsigned)AM.HasBaseReg + Scale) <= 2)
5208 // Note, we allow "void" uses (basically, uses that aren't loads or
5209 // stores), because arm allows folding a scale into many arithmetic
5210 // operations. This should be made more precise and revisited later.
5212 // Allow r << imm, but the imm has to be a multiple of two.
5213 if (Scale & 1) return false;
5214 return isPowerOf2_32(Scale);
5221 /// isLegalICmpImmediate - Return true if the specified immediate is legal
5222 /// icmp immediate, that is the target has icmp instructions which can compare
5223 /// a register against the immediate without having to materialize the
5224 /// immediate into a register.
5225 bool ARMTargetLowering::isLegalICmpImmediate(int64_t Imm) const {
5226 if (!Subtarget->isThumb())
5227 return ARM_AM::getSOImmVal(Imm) != -1;
5228 if (Subtarget->isThumb2())
5229 return ARM_AM::getT2SOImmVal(Imm) != -1;
5230 return Imm >= 0 && Imm <= 255;
5233 static bool getARMIndexedAddressParts(SDNode *Ptr, EVT VT,
5234 bool isSEXTLoad, SDValue &Base,
5235 SDValue &Offset, bool &isInc,
5236 SelectionDAG &DAG) {
5237 if (Ptr->getOpcode() != ISD::ADD && Ptr->getOpcode() != ISD::SUB)
5240 if (VT == MVT::i16 || ((VT == MVT::i8 || VT == MVT::i1) && isSEXTLoad)) {
5242 Base = Ptr->getOperand(0);
5243 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
5244 int RHSC = (int)RHS->getZExtValue();
5245 if (RHSC < 0 && RHSC > -256) {
5246 assert(Ptr->getOpcode() == ISD::ADD);
5248 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
5252 isInc = (Ptr->getOpcode() == ISD::ADD);
5253 Offset = Ptr->getOperand(1);
5255 } else if (VT == MVT::i32 || VT == MVT::i8 || VT == MVT::i1) {
5257 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
5258 int RHSC = (int)RHS->getZExtValue();
5259 if (RHSC < 0 && RHSC > -0x1000) {
5260 assert(Ptr->getOpcode() == ISD::ADD);
5262 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
5263 Base = Ptr->getOperand(0);
5268 if (Ptr->getOpcode() == ISD::ADD) {
5270 ARM_AM::ShiftOpc ShOpcVal= ARM_AM::getShiftOpcForNode(Ptr->getOperand(0));
5271 if (ShOpcVal != ARM_AM::no_shift) {
5272 Base = Ptr->getOperand(1);
5273 Offset = Ptr->getOperand(0);
5275 Base = Ptr->getOperand(0);
5276 Offset = Ptr->getOperand(1);
5281 isInc = (Ptr->getOpcode() == ISD::ADD);
5282 Base = Ptr->getOperand(0);
5283 Offset = Ptr->getOperand(1);
5287 // FIXME: Use VLDM / VSTM to emulate indexed FP load / store.
5291 static bool getT2IndexedAddressParts(SDNode *Ptr, EVT VT,
5292 bool isSEXTLoad, SDValue &Base,
5293 SDValue &Offset, bool &isInc,
5294 SelectionDAG &DAG) {
5295 if (Ptr->getOpcode() != ISD::ADD && Ptr->getOpcode() != ISD::SUB)
5298 Base = Ptr->getOperand(0);
5299 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
5300 int RHSC = (int)RHS->getZExtValue();
5301 if (RHSC < 0 && RHSC > -0x100) { // 8 bits.
5302 assert(Ptr->getOpcode() == ISD::ADD);
5304 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
5306 } else if (RHSC > 0 && RHSC < 0x100) { // 8 bit, no zero.
5307 isInc = Ptr->getOpcode() == ISD::ADD;
5308 Offset = DAG.getConstant(RHSC, RHS->getValueType(0));
5316 /// getPreIndexedAddressParts - returns true by value, base pointer and
5317 /// offset pointer and addressing mode by reference if the node's address
5318 /// can be legally represented as pre-indexed load / store address.
5320 ARMTargetLowering::getPreIndexedAddressParts(SDNode *N, SDValue &Base,
5322 ISD::MemIndexedMode &AM,
5323 SelectionDAG &DAG) const {
5324 if (Subtarget->isThumb1Only())
5329 bool isSEXTLoad = false;
5330 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
5331 Ptr = LD->getBasePtr();
5332 VT = LD->getMemoryVT();
5333 isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD;
5334 } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
5335 Ptr = ST->getBasePtr();
5336 VT = ST->getMemoryVT();
5341 bool isLegal = false;
5342 if (Subtarget->isThumb2())
5343 isLegal = getT2IndexedAddressParts(Ptr.getNode(), VT, isSEXTLoad, Base,
5344 Offset, isInc, DAG);
5346 isLegal = getARMIndexedAddressParts(Ptr.getNode(), VT, isSEXTLoad, Base,
5347 Offset, isInc, DAG);
5351 AM = isInc ? ISD::PRE_INC : ISD::PRE_DEC;
5355 /// getPostIndexedAddressParts - returns true by value, base pointer and
5356 /// offset pointer and addressing mode by reference if this node can be
5357 /// combined with a load / store to form a post-indexed load / store.
5358 bool ARMTargetLowering::getPostIndexedAddressParts(SDNode *N, SDNode *Op,
5361 ISD::MemIndexedMode &AM,
5362 SelectionDAG &DAG) const {
5363 if (Subtarget->isThumb1Only())
5368 bool isSEXTLoad = false;
5369 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
5370 VT = LD->getMemoryVT();
5371 Ptr = LD->getBasePtr();
5372 isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD;
5373 } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
5374 VT = ST->getMemoryVT();
5375 Ptr = ST->getBasePtr();
5380 bool isLegal = false;
5381 if (Subtarget->isThumb2())
5382 isLegal = getT2IndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset,
5385 isLegal = getARMIndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset,
5391 // Swap base ptr and offset to catch more post-index load / store when
5392 // it's legal. In Thumb2 mode, offset must be an immediate.
5393 if (Ptr == Offset && Op->getOpcode() == ISD::ADD &&
5394 !Subtarget->isThumb2())
5395 std::swap(Base, Offset);
5397 // Post-indexed load / store update the base pointer.
5402 AM = isInc ? ISD::POST_INC : ISD::POST_DEC;
5406 void ARMTargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
5410 const SelectionDAG &DAG,
5411 unsigned Depth) const {
5412 KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0);
5413 switch (Op.getOpcode()) {
5415 case ARMISD::CMOV: {
5416 // Bits are known zero/one if known on the LHS and RHS.
5417 DAG.ComputeMaskedBits(Op.getOperand(0), Mask, KnownZero, KnownOne, Depth+1);
5418 if (KnownZero == 0 && KnownOne == 0) return;
5420 APInt KnownZeroRHS, KnownOneRHS;
5421 DAG.ComputeMaskedBits(Op.getOperand(1), Mask,
5422 KnownZeroRHS, KnownOneRHS, Depth+1);
5423 KnownZero &= KnownZeroRHS;
5424 KnownOne &= KnownOneRHS;
5430 //===----------------------------------------------------------------------===//
5431 // ARM Inline Assembly Support
5432 //===----------------------------------------------------------------------===//
5434 /// getConstraintType - Given a constraint letter, return the type of
5435 /// constraint it is for this target.
5436 ARMTargetLowering::ConstraintType
5437 ARMTargetLowering::getConstraintType(const std::string &Constraint) const {
5438 if (Constraint.size() == 1) {
5439 switch (Constraint[0]) {
5441 case 'l': return C_RegisterClass;
5442 case 'w': return C_RegisterClass;
5445 return TargetLowering::getConstraintType(Constraint);
5448 /// Examine constraint type and operand type and determine a weight value.
5449 /// This object must already have been set up with the operand type
5450 /// and the current alternative constraint selected.
5451 TargetLowering::ConstraintWeight
5452 ARMTargetLowering::getSingleConstraintMatchWeight(
5453 AsmOperandInfo &info, const char *constraint) const {
5454 ConstraintWeight weight = CW_Invalid;
5455 Value *CallOperandVal = info.CallOperandVal;
5456 // If we don't have a value, we can't do a match,
5457 // but allow it at the lowest weight.
5458 if (CallOperandVal == NULL)
5460 const Type *type = CallOperandVal->getType();
5461 // Look at the constraint type.
5462 switch (*constraint) {
5464 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
5467 if (type->isIntegerTy()) {
5468 if (Subtarget->isThumb())
5469 weight = CW_SpecificReg;
5471 weight = CW_Register;
5475 if (type->isFloatingPointTy())
5476 weight = CW_Register;
5482 std::pair<unsigned, const TargetRegisterClass*>
5483 ARMTargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
5485 if (Constraint.size() == 1) {
5486 // GCC ARM Constraint Letters
5487 switch (Constraint[0]) {
5489 if (Subtarget->isThumb())
5490 return std::make_pair(0U, ARM::tGPRRegisterClass);
5492 return std::make_pair(0U, ARM::GPRRegisterClass);
5494 return std::make_pair(0U, ARM::GPRRegisterClass);
5497 return std::make_pair(0U, ARM::SPRRegisterClass);
5498 if (VT.getSizeInBits() == 64)
5499 return std::make_pair(0U, ARM::DPRRegisterClass);
5500 if (VT.getSizeInBits() == 128)
5501 return std::make_pair(0U, ARM::QPRRegisterClass);
5505 if (StringRef("{cc}").equals_lower(Constraint))
5506 return std::make_pair(unsigned(ARM::CPSR), ARM::CCRRegisterClass);
5508 return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
5511 std::vector<unsigned> ARMTargetLowering::
5512 getRegClassForInlineAsmConstraint(const std::string &Constraint,
5514 if (Constraint.size() != 1)
5515 return std::vector<unsigned>();
5517 switch (Constraint[0]) { // GCC ARM Constraint Letters
5520 return make_vector<unsigned>(ARM::R0, ARM::R1, ARM::R2, ARM::R3,
5521 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
5524 return make_vector<unsigned>(ARM::R0, ARM::R1, ARM::R2, ARM::R3,
5525 ARM::R4, ARM::R5, ARM::R6, ARM::R7,
5526 ARM::R8, ARM::R9, ARM::R10, ARM::R11,
5527 ARM::R12, ARM::LR, 0);
5530 return make_vector<unsigned>(ARM::S0, ARM::S1, ARM::S2, ARM::S3,
5531 ARM::S4, ARM::S5, ARM::S6, ARM::S7,
5532 ARM::S8, ARM::S9, ARM::S10, ARM::S11,
5533 ARM::S12,ARM::S13,ARM::S14,ARM::S15,
5534 ARM::S16,ARM::S17,ARM::S18,ARM::S19,
5535 ARM::S20,ARM::S21,ARM::S22,ARM::S23,
5536 ARM::S24,ARM::S25,ARM::S26,ARM::S27,
5537 ARM::S28,ARM::S29,ARM::S30,ARM::S31, 0);
5538 if (VT.getSizeInBits() == 64)
5539 return make_vector<unsigned>(ARM::D0, ARM::D1, ARM::D2, ARM::D3,
5540 ARM::D4, ARM::D5, ARM::D6, ARM::D7,
5541 ARM::D8, ARM::D9, ARM::D10,ARM::D11,
5542 ARM::D12,ARM::D13,ARM::D14,ARM::D15, 0);
5543 if (VT.getSizeInBits() == 128)
5544 return make_vector<unsigned>(ARM::Q0, ARM::Q1, ARM::Q2, ARM::Q3,
5545 ARM::Q4, ARM::Q5, ARM::Q6, ARM::Q7, 0);
5549 return std::vector<unsigned>();
5552 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
5553 /// vector. If it is invalid, don't add anything to Ops.
5554 void ARMTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
5556 std::vector<SDValue>&Ops,
5557 SelectionDAG &DAG) const {
5558 SDValue Result(0, 0);
5560 switch (Constraint) {
5562 case 'I': case 'J': case 'K': case 'L':
5563 case 'M': case 'N': case 'O':
5564 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op);
5568 int64_t CVal64 = C->getSExtValue();
5569 int CVal = (int) CVal64;
5570 // None of these constraints allow values larger than 32 bits. Check
5571 // that the value fits in an int.
5575 switch (Constraint) {
5577 if (Subtarget->isThumb1Only()) {
5578 // This must be a constant between 0 and 255, for ADD
5580 if (CVal >= 0 && CVal <= 255)
5582 } else if (Subtarget->isThumb2()) {
5583 // A constant that can be used as an immediate value in a
5584 // data-processing instruction.
5585 if (ARM_AM::getT2SOImmVal(CVal) != -1)
5588 // A constant that can be used as an immediate value in a
5589 // data-processing instruction.
5590 if (ARM_AM::getSOImmVal(CVal) != -1)
5596 if (Subtarget->isThumb()) { // FIXME thumb2
5597 // This must be a constant between -255 and -1, for negated ADD
5598 // immediates. This can be used in GCC with an "n" modifier that
5599 // prints the negated value, for use with SUB instructions. It is
5600 // not useful otherwise but is implemented for compatibility.
5601 if (CVal >= -255 && CVal <= -1)
5604 // This must be a constant between -4095 and 4095. It is not clear
5605 // what this constraint is intended for. Implemented for
5606 // compatibility with GCC.
5607 if (CVal >= -4095 && CVal <= 4095)
5613 if (Subtarget->isThumb1Only()) {
5614 // A 32-bit value where only one byte has a nonzero value. Exclude
5615 // zero to match GCC. This constraint is used by GCC internally for
5616 // constants that can be loaded with a move/shift combination.
5617 // It is not useful otherwise but is implemented for compatibility.
5618 if (CVal != 0 && ARM_AM::isThumbImmShiftedVal(CVal))
5620 } else if (Subtarget->isThumb2()) {
5621 // A constant whose bitwise inverse can be used as an immediate
5622 // value in a data-processing instruction. This can be used in GCC
5623 // with a "B" modifier that prints the inverted value, for use with
5624 // BIC and MVN instructions. It is not useful otherwise but is
5625 // implemented for compatibility.
5626 if (ARM_AM::getT2SOImmVal(~CVal) != -1)
5629 // A constant whose bitwise inverse can be used as an immediate
5630 // value in a data-processing instruction. This can be used in GCC
5631 // with a "B" modifier that prints the inverted value, for use with
5632 // BIC and MVN instructions. It is not useful otherwise but is
5633 // implemented for compatibility.
5634 if (ARM_AM::getSOImmVal(~CVal) != -1)
5640 if (Subtarget->isThumb1Only()) {
5641 // This must be a constant between -7 and 7,
5642 // for 3-operand ADD/SUB immediate instructions.
5643 if (CVal >= -7 && CVal < 7)
5645 } else if (Subtarget->isThumb2()) {
5646 // A constant whose negation can be used as an immediate value in a
5647 // data-processing instruction. This can be used in GCC with an "n"
5648 // modifier that prints the negated value, for use with SUB
5649 // instructions. It is not useful otherwise but is implemented for
5651 if (ARM_AM::getT2SOImmVal(-CVal) != -1)
5654 // A constant whose negation can be used as an immediate value in a
5655 // data-processing instruction. This can be used in GCC with an "n"
5656 // modifier that prints the negated value, for use with SUB
5657 // instructions. It is not useful otherwise but is implemented for
5659 if (ARM_AM::getSOImmVal(-CVal) != -1)
5665 if (Subtarget->isThumb()) { // FIXME thumb2
5666 // This must be a multiple of 4 between 0 and 1020, for
5667 // ADD sp + immediate.
5668 if ((CVal >= 0 && CVal <= 1020) && ((CVal & 3) == 0))
5671 // A power of two or a constant between 0 and 32. This is used in
5672 // GCC for the shift amount on shifted register operands, but it is
5673 // useful in general for any shift amounts.
5674 if ((CVal >= 0 && CVal <= 32) || ((CVal & (CVal - 1)) == 0))
5680 if (Subtarget->isThumb()) { // FIXME thumb2
5681 // This must be a constant between 0 and 31, for shift amounts.
5682 if (CVal >= 0 && CVal <= 31)
5688 if (Subtarget->isThumb()) { // FIXME thumb2
5689 // This must be a multiple of 4 between -508 and 508, for
5690 // ADD/SUB sp = sp + immediate.
5691 if ((CVal >= -508 && CVal <= 508) && ((CVal & 3) == 0))
5696 Result = DAG.getTargetConstant(CVal, Op.getValueType());
5700 if (Result.getNode()) {
5701 Ops.push_back(Result);
5704 return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
5708 ARMTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
5709 // The ARM target isn't yet aware of offsets.
5713 int ARM::getVFPf32Imm(const APFloat &FPImm) {
5714 APInt Imm = FPImm.bitcastToAPInt();
5715 uint32_t Sign = Imm.lshr(31).getZExtValue() & 1;
5716 int32_t Exp = (Imm.lshr(23).getSExtValue() & 0xff) - 127; // -126 to 127
5717 int64_t Mantissa = Imm.getZExtValue() & 0x7fffff; // 23 bits
5719 // We can handle 4 bits of mantissa.
5720 // mantissa = (16+UInt(e:f:g:h))/16.
5721 if (Mantissa & 0x7ffff)
5724 if ((Mantissa & 0xf) != Mantissa)
5727 // We can handle 3 bits of exponent: exp == UInt(NOT(b):c:d)-3
5728 if (Exp < -3 || Exp > 4)
5730 Exp = ((Exp+3) & 0x7) ^ 4;
5732 return ((int)Sign << 7) | (Exp << 4) | Mantissa;
5735 int ARM::getVFPf64Imm(const APFloat &FPImm) {
5736 APInt Imm = FPImm.bitcastToAPInt();
5737 uint64_t Sign = Imm.lshr(63).getZExtValue() & 1;
5738 int64_t Exp = (Imm.lshr(52).getSExtValue() & 0x7ff) - 1023; // -1022 to 1023
5739 uint64_t Mantissa = Imm.getZExtValue() & 0xfffffffffffffLL;
5741 // We can handle 4 bits of mantissa.
5742 // mantissa = (16+UInt(e:f:g:h))/16.
5743 if (Mantissa & 0xffffffffffffLL)
5746 if ((Mantissa & 0xf) != Mantissa)
5749 // We can handle 3 bits of exponent: exp == UInt(NOT(b):c:d)-3
5750 if (Exp < -3 || Exp > 4)
5752 Exp = ((Exp+3) & 0x7) ^ 4;
5754 return ((int)Sign << 7) | (Exp << 4) | Mantissa;
5757 bool ARM::isBitFieldInvertedMask(unsigned v) {
5758 if (v == 0xffffffff)
5760 // there can be 1's on either or both "outsides", all the "inside"
5762 unsigned int lsb = 0, msb = 31;
5763 while (v & (1 << msb)) --msb;
5764 while (v & (1 << lsb)) ++lsb;
5765 for (unsigned int i = lsb; i <= msb; ++i) {
5772 /// isFPImmLegal - Returns true if the target can instruction select the
5773 /// specified FP immediate natively. If false, the legalizer will
5774 /// materialize the FP immediate as a load from a constant pool.
5775 bool ARMTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
5776 if (!Subtarget->hasVFP3())
5779 return ARM::getVFPf32Imm(Imm) != -1;
5781 return ARM::getVFPf64Imm(Imm) != -1;
5785 /// getTgtMemIntrinsic - Represent NEON load and store intrinsics as
5786 /// MemIntrinsicNodes. The associated MachineMemOperands record the alignment
5787 /// specified in the intrinsic calls.
5788 bool ARMTargetLowering::getTgtMemIntrinsic(IntrinsicInfo &Info,
5790 unsigned Intrinsic) const {
5791 switch (Intrinsic) {
5792 case Intrinsic::arm_neon_vld1:
5793 case Intrinsic::arm_neon_vld2:
5794 case Intrinsic::arm_neon_vld3:
5795 case Intrinsic::arm_neon_vld4:
5796 case Intrinsic::arm_neon_vld2lane:
5797 case Intrinsic::arm_neon_vld3lane:
5798 case Intrinsic::arm_neon_vld4lane: {
5799 Info.opc = ISD::INTRINSIC_W_CHAIN;
5800 // Conservatively set memVT to the entire set of vectors loaded.
5801 uint64_t NumElts = getTargetData()->getTypeAllocSize(I.getType()) / 8;
5802 Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts);
5803 Info.ptrVal = I.getArgOperand(0);
5805 Value *AlignArg = I.getArgOperand(I.getNumArgOperands() - 1);
5806 Info.align = cast<ConstantInt>(AlignArg)->getZExtValue();
5807 Info.vol = false; // volatile loads with NEON intrinsics not supported
5808 Info.readMem = true;
5809 Info.writeMem = false;
5812 case Intrinsic::arm_neon_vst1:
5813 case Intrinsic::arm_neon_vst2:
5814 case Intrinsic::arm_neon_vst3:
5815 case Intrinsic::arm_neon_vst4:
5816 case Intrinsic::arm_neon_vst2lane:
5817 case Intrinsic::arm_neon_vst3lane:
5818 case Intrinsic::arm_neon_vst4lane: {
5819 Info.opc = ISD::INTRINSIC_VOID;
5820 // Conservatively set memVT to the entire set of vectors stored.
5821 unsigned NumElts = 0;
5822 for (unsigned ArgI = 1, ArgE = I.getNumArgOperands(); ArgI < ArgE; ++ArgI) {
5823 const Type *ArgTy = I.getArgOperand(ArgI)->getType();
5824 if (!ArgTy->isVectorTy())
5826 NumElts += getTargetData()->getTypeAllocSize(ArgTy) / 8;
5828 Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts);
5829 Info.ptrVal = I.getArgOperand(0);
5831 Value *AlignArg = I.getArgOperand(I.getNumArgOperands() - 1);
5832 Info.align = cast<ConstantInt>(AlignArg)->getZExtValue();
5833 Info.vol = false; // volatile stores with NEON intrinsics not supported
5834 Info.readMem = false;
5835 Info.writeMem = true;