1 //===-- MipsISelLowering.cpp - Mips 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 Mips uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
15 #define DEBUG_TYPE "mips-lower"
16 #include "MipsISelLowering.h"
17 #include "MipsMachineFunction.h"
18 #include "MipsTargetMachine.h"
19 #include "MipsTargetObjectFile.h"
20 #include "MipsSubtarget.h"
21 #include "InstPrinter/MipsInstPrinter.h"
22 #include "MCTargetDesc/MipsBaseInfo.h"
23 #include "llvm/DerivedTypes.h"
24 #include "llvm/Function.h"
25 #include "llvm/GlobalVariable.h"
26 #include "llvm/Intrinsics.h"
27 #include "llvm/CallingConv.h"
28 #include "llvm/CodeGen/CallingConvLower.h"
29 #include "llvm/CodeGen/MachineFrameInfo.h"
30 #include "llvm/CodeGen/MachineFunction.h"
31 #include "llvm/CodeGen/MachineInstrBuilder.h"
32 #include "llvm/CodeGen/MachineRegisterInfo.h"
33 #include "llvm/CodeGen/SelectionDAGISel.h"
34 #include "llvm/CodeGen/ValueTypes.h"
35 #include "llvm/Support/Debug.h"
36 #include "llvm/Support/ErrorHandling.h"
37 #include "llvm/Support/raw_ostream.h"
41 // If I is a shifted mask, set the size (Size) and the first bit of the
42 // mask (Pos), and return true.
43 // For example, if I is 0x003ff800, (Pos, Size) = (11, 11).
44 static bool IsShiftedMask(uint64_t I, uint64_t &Pos, uint64_t &Size) {
45 if (!isShiftedMask_64(I))
48 Size = CountPopulation_64(I);
49 Pos = CountTrailingZeros_64(I);
53 static SDValue GetGlobalReg(SelectionDAG &DAG, EVT Ty) {
54 MipsFunctionInfo *FI = DAG.getMachineFunction().getInfo<MipsFunctionInfo>();
55 return DAG.getRegister(FI->getGlobalBaseReg(), Ty);
58 const char *MipsTargetLowering::getTargetNodeName(unsigned Opcode) const {
60 case MipsISD::JmpLink: return "MipsISD::JmpLink";
61 case MipsISD::Hi: return "MipsISD::Hi";
62 case MipsISD::Lo: return "MipsISD::Lo";
63 case MipsISD::GPRel: return "MipsISD::GPRel";
64 case MipsISD::ThreadPointer: return "MipsISD::ThreadPointer";
65 case MipsISD::Ret: return "MipsISD::Ret";
66 case MipsISD::FPBrcond: return "MipsISD::FPBrcond";
67 case MipsISD::FPCmp: return "MipsISD::FPCmp";
68 case MipsISD::CMovFP_T: return "MipsISD::CMovFP_T";
69 case MipsISD::CMovFP_F: return "MipsISD::CMovFP_F";
70 case MipsISD::FPRound: return "MipsISD::FPRound";
71 case MipsISD::MAdd: return "MipsISD::MAdd";
72 case MipsISD::MAddu: return "MipsISD::MAddu";
73 case MipsISD::MSub: return "MipsISD::MSub";
74 case MipsISD::MSubu: return "MipsISD::MSubu";
75 case MipsISD::DivRem: return "MipsISD::DivRem";
76 case MipsISD::DivRemU: return "MipsISD::DivRemU";
77 case MipsISD::BuildPairF64: return "MipsISD::BuildPairF64";
78 case MipsISD::ExtractElementF64: return "MipsISD::ExtractElementF64";
79 case MipsISD::Wrapper: return "MipsISD::Wrapper";
80 case MipsISD::DynAlloc: return "MipsISD::DynAlloc";
81 case MipsISD::Sync: return "MipsISD::Sync";
82 case MipsISD::Ext: return "MipsISD::Ext";
83 case MipsISD::Ins: return "MipsISD::Ins";
84 case MipsISD::LWL: return "MipsISD::LWL";
85 case MipsISD::LWR: return "MipsISD::LWR";
86 case MipsISD::SWL: return "MipsISD::SWL";
87 case MipsISD::SWR: return "MipsISD::SWR";
88 case MipsISD::LDL: return "MipsISD::LDL";
89 case MipsISD::LDR: return "MipsISD::LDR";
90 case MipsISD::SDL: return "MipsISD::SDL";
91 case MipsISD::SDR: return "MipsISD::SDR";
92 case MipsISD::EXTP: return "MipsISD::EXTP";
93 case MipsISD::EXTPDP: return "MipsISD::EXTPDP";
94 case MipsISD::EXTR_S_H: return "MipsISD::EXTR_S_H";
95 case MipsISD::EXTR_W: return "MipsISD::EXTR_W";
96 case MipsISD::EXTR_R_W: return "MipsISD::EXTR_R_W";
97 case MipsISD::EXTR_RS_W: return "MipsISD::EXTR_RS_W";
98 case MipsISD::SHILO: return "MipsISD::SHILO";
99 case MipsISD::MTHLIP: return "MipsISD::MTHLIP";
100 case MipsISD::MULT: return "MipsISD::MULT";
101 case MipsISD::MULTU: return "MipsISD::MULTU";
102 case MipsISD::MADD_DSP: return "MipsISD::MADD_DSPDSP";
103 case MipsISD::MADDU_DSP: return "MipsISD::MADDU_DSP";
104 case MipsISD::MSUB_DSP: return "MipsISD::MSUB_DSP";
105 case MipsISD::MSUBU_DSP: return "MipsISD::MSUBU_DSP";
106 default: return NULL;
111 MipsTargetLowering(MipsTargetMachine &TM)
112 : TargetLowering(TM, new MipsTargetObjectFile()),
113 Subtarget(&TM.getSubtarget<MipsSubtarget>()),
114 HasMips64(Subtarget->hasMips64()), IsN64(Subtarget->isABI_N64()),
115 IsO32(Subtarget->isABI_O32()) {
117 // Mips does not have i1 type, so use i32 for
118 // setcc operations results (slt, sgt, ...).
119 setBooleanContents(ZeroOrOneBooleanContent);
120 setBooleanVectorContents(ZeroOrOneBooleanContent); // FIXME: Is this correct?
122 // Set up the register classes
123 addRegisterClass(MVT::i32, &Mips::CPURegsRegClass);
126 addRegisterClass(MVT::i64, &Mips::CPU64RegsRegClass);
128 if (Subtarget->inMips16Mode()) {
129 addRegisterClass(MVT::i32, &Mips::CPU16RegsRegClass);
132 if (Subtarget->hasDSP()) {
133 MVT::SimpleValueType VecTys[2] = {MVT::v2i16, MVT::v4i8};
135 for (unsigned i = 0; i < array_lengthof(VecTys); ++i) {
136 addRegisterClass(VecTys[i], &Mips::DSPRegsRegClass);
138 // Expand all builtin opcodes.
139 for (unsigned Opc = 0; Opc < ISD::BUILTIN_OP_END; ++Opc)
140 setOperationAction(Opc, VecTys[i], Expand);
142 setOperationAction(ISD::LOAD, VecTys[i], Legal);
143 setOperationAction(ISD::STORE, VecTys[i], Legal);
144 setOperationAction(ISD::BITCAST, VecTys[i], Legal);
148 if (!TM.Options.UseSoftFloat) {
149 addRegisterClass(MVT::f32, &Mips::FGR32RegClass);
151 // When dealing with single precision only, use libcalls
152 if (!Subtarget->isSingleFloat()) {
154 addRegisterClass(MVT::f64, &Mips::FGR64RegClass);
156 addRegisterClass(MVT::f64, &Mips::AFGR64RegClass);
160 // Load extented operations for i1 types must be promoted
161 setLoadExtAction(ISD::EXTLOAD, MVT::i1, Promote);
162 setLoadExtAction(ISD::ZEXTLOAD, MVT::i1, Promote);
163 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
165 // MIPS doesn't have extending float->double load/store
166 setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
167 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
169 // Used by legalize types to correctly generate the setcc result.
170 // Without this, every float setcc comes with a AND/OR with the result,
171 // we don't want this, since the fpcmp result goes to a flag register,
172 // which is used implicitly by brcond and select operations.
173 AddPromotedToType(ISD::SETCC, MVT::i1, MVT::i32);
175 // Mips Custom Operations
176 setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
177 setOperationAction(ISD::BlockAddress, MVT::i32, Custom);
178 setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
179 setOperationAction(ISD::JumpTable, MVT::i32, Custom);
180 setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
181 setOperationAction(ISD::SELECT, MVT::f32, Custom);
182 setOperationAction(ISD::SELECT, MVT::f64, Custom);
183 setOperationAction(ISD::SELECT, MVT::i32, Custom);
184 setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
185 setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
186 setOperationAction(ISD::SETCC, MVT::f32, Custom);
187 setOperationAction(ISD::SETCC, MVT::f64, Custom);
188 setOperationAction(ISD::BRCOND, MVT::Other, Custom);
189 setOperationAction(ISD::VASTART, MVT::Other, Custom);
190 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
191 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
192 setOperationAction(ISD::MEMBARRIER, MVT::Other, Custom);
193 setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Custom);
194 if (!Subtarget->inMips16Mode()) {
195 setOperationAction(ISD::LOAD, MVT::i32, Custom);
196 setOperationAction(ISD::STORE, MVT::i32, Custom);
199 if (!TM.Options.NoNaNsFPMath) {
200 setOperationAction(ISD::FABS, MVT::f32, Custom);
201 setOperationAction(ISD::FABS, MVT::f64, Custom);
205 setOperationAction(ISD::GlobalAddress, MVT::i64, Custom);
206 setOperationAction(ISD::BlockAddress, MVT::i64, Custom);
207 setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
208 setOperationAction(ISD::JumpTable, MVT::i64, Custom);
209 setOperationAction(ISD::ConstantPool, MVT::i64, Custom);
210 setOperationAction(ISD::SELECT, MVT::i64, Custom);
211 setOperationAction(ISD::LOAD, MVT::i64, Custom);
212 setOperationAction(ISD::STORE, MVT::i64, Custom);
216 setOperationAction(ISD::SHL_PARTS, MVT::i32, Custom);
217 setOperationAction(ISD::SRA_PARTS, MVT::i32, Custom);
218 setOperationAction(ISD::SRL_PARTS, MVT::i32, Custom);
221 setOperationAction(ISD::SDIV, MVT::i32, Expand);
222 setOperationAction(ISD::SREM, MVT::i32, Expand);
223 setOperationAction(ISD::UDIV, MVT::i32, Expand);
224 setOperationAction(ISD::UREM, MVT::i32, Expand);
225 setOperationAction(ISD::SDIV, MVT::i64, Expand);
226 setOperationAction(ISD::SREM, MVT::i64, Expand);
227 setOperationAction(ISD::UDIV, MVT::i64, Expand);
228 setOperationAction(ISD::UREM, MVT::i64, Expand);
230 // Operations not directly supported by Mips.
231 setOperationAction(ISD::BR_JT, MVT::Other, Expand);
232 setOperationAction(ISD::BR_CC, MVT::Other, Expand);
233 setOperationAction(ISD::SELECT_CC, MVT::Other, Expand);
234 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Expand);
235 setOperationAction(ISD::UINT_TO_FP, MVT::i64, Expand);
236 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Expand);
237 setOperationAction(ISD::FP_TO_UINT, MVT::i64, Expand);
238 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
239 setOperationAction(ISD::CTPOP, MVT::i32, Expand);
240 setOperationAction(ISD::CTPOP, MVT::i64, Expand);
241 setOperationAction(ISD::CTTZ, MVT::i32, Expand);
242 setOperationAction(ISD::CTTZ, MVT::i64, Expand);
243 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i32, Expand);
244 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i64, Expand);
245 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32, Expand);
246 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Expand);
247 setOperationAction(ISD::ROTL, MVT::i32, Expand);
248 setOperationAction(ISD::ROTL, MVT::i64, Expand);
249 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand);
250 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Expand);
252 if (!Subtarget->hasMips32r2())
253 setOperationAction(ISD::ROTR, MVT::i32, Expand);
255 if (!Subtarget->hasMips64r2())
256 setOperationAction(ISD::ROTR, MVT::i64, Expand);
258 setOperationAction(ISD::FSIN, MVT::f32, Expand);
259 setOperationAction(ISD::FSIN, MVT::f64, Expand);
260 setOperationAction(ISD::FCOS, MVT::f32, Expand);
261 setOperationAction(ISD::FCOS, MVT::f64, Expand);
262 setOperationAction(ISD::FPOWI, MVT::f32, Expand);
263 setOperationAction(ISD::FPOW, MVT::f32, Expand);
264 setOperationAction(ISD::FPOW, MVT::f64, Expand);
265 setOperationAction(ISD::FLOG, MVT::f32, Expand);
266 setOperationAction(ISD::FLOG2, MVT::f32, Expand);
267 setOperationAction(ISD::FLOG10, MVT::f32, Expand);
268 setOperationAction(ISD::FEXP, MVT::f32, Expand);
269 setOperationAction(ISD::FMA, MVT::f32, Expand);
270 setOperationAction(ISD::FMA, MVT::f64, Expand);
271 setOperationAction(ISD::FREM, MVT::f32, Expand);
272 setOperationAction(ISD::FREM, MVT::f64, Expand);
274 if (!TM.Options.NoNaNsFPMath) {
275 setOperationAction(ISD::FNEG, MVT::f32, Expand);
276 setOperationAction(ISD::FNEG, MVT::f64, Expand);
279 setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
280 setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
281 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
282 setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
284 setOperationAction(ISD::VAARG, MVT::Other, Expand);
285 setOperationAction(ISD::VACOPY, MVT::Other, Expand);
286 setOperationAction(ISD::VAEND, MVT::Other, Expand);
288 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::i64, Custom);
289 setOperationAction(ISD::INTRINSIC_W_CHAIN, MVT::i64, Custom);
291 // Use the default for now
292 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
293 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
295 setOperationAction(ISD::ATOMIC_LOAD, MVT::i32, Expand);
296 setOperationAction(ISD::ATOMIC_LOAD, MVT::i64, Expand);
297 setOperationAction(ISD::ATOMIC_STORE, MVT::i32, Expand);
298 setOperationAction(ISD::ATOMIC_STORE, MVT::i64, Expand);
300 setInsertFencesForAtomic(true);
302 if (!Subtarget->hasSEInReg()) {
303 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8, Expand);
304 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
307 if (!Subtarget->hasBitCount()) {
308 setOperationAction(ISD::CTLZ, MVT::i32, Expand);
309 setOperationAction(ISD::CTLZ, MVT::i64, Expand);
312 if (!Subtarget->hasSwap()) {
313 setOperationAction(ISD::BSWAP, MVT::i32, Expand);
314 setOperationAction(ISD::BSWAP, MVT::i64, Expand);
318 setLoadExtAction(ISD::SEXTLOAD, MVT::i32, Custom);
319 setLoadExtAction(ISD::ZEXTLOAD, MVT::i32, Custom);
320 setLoadExtAction(ISD::EXTLOAD, MVT::i32, Custom);
321 setTruncStoreAction(MVT::i64, MVT::i32, Custom);
324 setTargetDAGCombine(ISD::ADDE);
325 setTargetDAGCombine(ISD::SUBE);
326 setTargetDAGCombine(ISD::SDIVREM);
327 setTargetDAGCombine(ISD::UDIVREM);
328 setTargetDAGCombine(ISD::SELECT);
329 setTargetDAGCombine(ISD::AND);
330 setTargetDAGCombine(ISD::OR);
331 setTargetDAGCombine(ISD::ADD);
333 setMinFunctionAlignment(HasMips64 ? 3 : 2);
335 setStackPointerRegisterToSaveRestore(IsN64 ? Mips::SP_64 : Mips::SP);
336 computeRegisterProperties();
338 setExceptionPointerRegister(IsN64 ? Mips::A0_64 : Mips::A0);
339 setExceptionSelectorRegister(IsN64 ? Mips::A1_64 : Mips::A1);
341 maxStoresPerMemcpy = 16;
344 bool MipsTargetLowering::allowsUnalignedMemoryAccesses(EVT VT) const {
345 MVT::SimpleValueType SVT = VT.getSimpleVT().SimpleTy;
347 if (Subtarget->inMips16Mode())
359 EVT MipsTargetLowering::getSetCCResultType(EVT VT) const {
364 // Transforms a subgraph in CurDAG if the following pattern is found:
365 // (addc multLo, Lo0), (adde multHi, Hi0),
367 // multHi/Lo: product of multiplication
368 // Lo0: initial value of Lo register
369 // Hi0: initial value of Hi register
370 // Return true if pattern matching was successful.
371 static bool SelectMadd(SDNode *ADDENode, SelectionDAG *CurDAG) {
372 // ADDENode's second operand must be a flag output of an ADDC node in order
373 // for the matching to be successful.
374 SDNode *ADDCNode = ADDENode->getOperand(2).getNode();
376 if (ADDCNode->getOpcode() != ISD::ADDC)
379 SDValue MultHi = ADDENode->getOperand(0);
380 SDValue MultLo = ADDCNode->getOperand(0);
381 SDNode *MultNode = MultHi.getNode();
382 unsigned MultOpc = MultHi.getOpcode();
384 // MultHi and MultLo must be generated by the same node,
385 if (MultLo.getNode() != MultNode)
388 // and it must be a multiplication.
389 if (MultOpc != ISD::SMUL_LOHI && MultOpc != ISD::UMUL_LOHI)
392 // MultLo amd MultHi must be the first and second output of MultNode
394 if (MultHi.getResNo() != 1 || MultLo.getResNo() != 0)
397 // Transform this to a MADD only if ADDENode and ADDCNode are the only users
398 // of the values of MultNode, in which case MultNode will be removed in later
400 // If there exist users other than ADDENode or ADDCNode, this function returns
401 // here, which will result in MultNode being mapped to a single MULT
402 // instruction node rather than a pair of MULT and MADD instructions being
404 if (!MultHi.hasOneUse() || !MultLo.hasOneUse())
407 SDValue Chain = CurDAG->getEntryNode();
408 DebugLoc dl = ADDENode->getDebugLoc();
410 // create MipsMAdd(u) node
411 MultOpc = MultOpc == ISD::UMUL_LOHI ? MipsISD::MAddu : MipsISD::MAdd;
413 SDValue MAdd = CurDAG->getNode(MultOpc, dl, MVT::Glue,
414 MultNode->getOperand(0),// Factor 0
415 MultNode->getOperand(1),// Factor 1
416 ADDCNode->getOperand(1),// Lo0
417 ADDENode->getOperand(1));// Hi0
419 // create CopyFromReg nodes
420 SDValue CopyFromLo = CurDAG->getCopyFromReg(Chain, dl, Mips::LO, MVT::i32,
422 SDValue CopyFromHi = CurDAG->getCopyFromReg(CopyFromLo.getValue(1), dl,
424 CopyFromLo.getValue(2));
426 // replace uses of adde and addc here
427 if (!SDValue(ADDCNode, 0).use_empty())
428 CurDAG->ReplaceAllUsesOfValueWith(SDValue(ADDCNode, 0), CopyFromLo);
430 if (!SDValue(ADDENode, 0).use_empty())
431 CurDAG->ReplaceAllUsesOfValueWith(SDValue(ADDENode, 0), CopyFromHi);
437 // Transforms a subgraph in CurDAG if the following pattern is found:
438 // (addc Lo0, multLo), (sube Hi0, multHi),
440 // multHi/Lo: product of multiplication
441 // Lo0: initial value of Lo register
442 // Hi0: initial value of Hi register
443 // Return true if pattern matching was successful.
444 static bool SelectMsub(SDNode *SUBENode, SelectionDAG *CurDAG) {
445 // SUBENode's second operand must be a flag output of an SUBC node in order
446 // for the matching to be successful.
447 SDNode *SUBCNode = SUBENode->getOperand(2).getNode();
449 if (SUBCNode->getOpcode() != ISD::SUBC)
452 SDValue MultHi = SUBENode->getOperand(1);
453 SDValue MultLo = SUBCNode->getOperand(1);
454 SDNode *MultNode = MultHi.getNode();
455 unsigned MultOpc = MultHi.getOpcode();
457 // MultHi and MultLo must be generated by the same node,
458 if (MultLo.getNode() != MultNode)
461 // and it must be a multiplication.
462 if (MultOpc != ISD::SMUL_LOHI && MultOpc != ISD::UMUL_LOHI)
465 // MultLo amd MultHi must be the first and second output of MultNode
467 if (MultHi.getResNo() != 1 || MultLo.getResNo() != 0)
470 // Transform this to a MSUB only if SUBENode and SUBCNode are the only users
471 // of the values of MultNode, in which case MultNode will be removed in later
473 // If there exist users other than SUBENode or SUBCNode, this function returns
474 // here, which will result in MultNode being mapped to a single MULT
475 // instruction node rather than a pair of MULT and MSUB instructions being
477 if (!MultHi.hasOneUse() || !MultLo.hasOneUse())
480 SDValue Chain = CurDAG->getEntryNode();
481 DebugLoc dl = SUBENode->getDebugLoc();
483 // create MipsSub(u) node
484 MultOpc = MultOpc == ISD::UMUL_LOHI ? MipsISD::MSubu : MipsISD::MSub;
486 SDValue MSub = CurDAG->getNode(MultOpc, dl, MVT::Glue,
487 MultNode->getOperand(0),// Factor 0
488 MultNode->getOperand(1),// Factor 1
489 SUBCNode->getOperand(0),// Lo0
490 SUBENode->getOperand(0));// Hi0
492 // create CopyFromReg nodes
493 SDValue CopyFromLo = CurDAG->getCopyFromReg(Chain, dl, Mips::LO, MVT::i32,
495 SDValue CopyFromHi = CurDAG->getCopyFromReg(CopyFromLo.getValue(1), dl,
497 CopyFromLo.getValue(2));
499 // replace uses of sube and subc here
500 if (!SDValue(SUBCNode, 0).use_empty())
501 CurDAG->ReplaceAllUsesOfValueWith(SDValue(SUBCNode, 0), CopyFromLo);
503 if (!SDValue(SUBENode, 0).use_empty())
504 CurDAG->ReplaceAllUsesOfValueWith(SDValue(SUBENode, 0), CopyFromHi);
509 static SDValue PerformADDECombine(SDNode *N, SelectionDAG &DAG,
510 TargetLowering::DAGCombinerInfo &DCI,
511 const MipsSubtarget *Subtarget) {
512 if (DCI.isBeforeLegalize())
515 if (Subtarget->hasMips32() && N->getValueType(0) == MVT::i32 &&
517 return SDValue(N, 0);
522 static SDValue PerformSUBECombine(SDNode *N, SelectionDAG &DAG,
523 TargetLowering::DAGCombinerInfo &DCI,
524 const MipsSubtarget *Subtarget) {
525 if (DCI.isBeforeLegalize())
528 if (Subtarget->hasMips32() && N->getValueType(0) == MVT::i32 &&
530 return SDValue(N, 0);
535 static SDValue PerformDivRemCombine(SDNode *N, SelectionDAG &DAG,
536 TargetLowering::DAGCombinerInfo &DCI,
537 const MipsSubtarget *Subtarget) {
538 if (DCI.isBeforeLegalizeOps())
541 EVT Ty = N->getValueType(0);
542 unsigned LO = (Ty == MVT::i32) ? Mips::LO : Mips::LO64;
543 unsigned HI = (Ty == MVT::i32) ? Mips::HI : Mips::HI64;
544 unsigned opc = N->getOpcode() == ISD::SDIVREM ? MipsISD::DivRem :
546 DebugLoc dl = N->getDebugLoc();
548 SDValue DivRem = DAG.getNode(opc, dl, MVT::Glue,
549 N->getOperand(0), N->getOperand(1));
550 SDValue InChain = DAG.getEntryNode();
551 SDValue InGlue = DivRem;
554 if (N->hasAnyUseOfValue(0)) {
555 SDValue CopyFromLo = DAG.getCopyFromReg(InChain, dl, LO, Ty,
557 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 0), CopyFromLo);
558 InChain = CopyFromLo.getValue(1);
559 InGlue = CopyFromLo.getValue(2);
563 if (N->hasAnyUseOfValue(1)) {
564 SDValue CopyFromHi = DAG.getCopyFromReg(InChain, dl,
566 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1), CopyFromHi);
572 static Mips::CondCode FPCondCCodeToFCC(ISD::CondCode CC) {
574 default: llvm_unreachable("Unknown fp condition code!");
576 case ISD::SETOEQ: return Mips::FCOND_OEQ;
577 case ISD::SETUNE: return Mips::FCOND_UNE;
579 case ISD::SETOLT: return Mips::FCOND_OLT;
581 case ISD::SETOGT: return Mips::FCOND_OGT;
583 case ISD::SETOLE: return Mips::FCOND_OLE;
585 case ISD::SETOGE: return Mips::FCOND_OGE;
586 case ISD::SETULT: return Mips::FCOND_ULT;
587 case ISD::SETULE: return Mips::FCOND_ULE;
588 case ISD::SETUGT: return Mips::FCOND_UGT;
589 case ISD::SETUGE: return Mips::FCOND_UGE;
590 case ISD::SETUO: return Mips::FCOND_UN;
591 case ISD::SETO: return Mips::FCOND_OR;
593 case ISD::SETONE: return Mips::FCOND_ONE;
594 case ISD::SETUEQ: return Mips::FCOND_UEQ;
599 // Returns true if condition code has to be inverted.
600 static bool InvertFPCondCode(Mips::CondCode CC) {
601 if (CC >= Mips::FCOND_F && CC <= Mips::FCOND_NGT)
604 assert((CC >= Mips::FCOND_T && CC <= Mips::FCOND_GT) &&
605 "Illegal Condition Code");
610 // Creates and returns an FPCmp node from a setcc node.
611 // Returns Op if setcc is not a floating point comparison.
612 static SDValue CreateFPCmp(SelectionDAG &DAG, const SDValue &Op) {
613 // must be a SETCC node
614 if (Op.getOpcode() != ISD::SETCC)
617 SDValue LHS = Op.getOperand(0);
619 if (!LHS.getValueType().isFloatingPoint())
622 SDValue RHS = Op.getOperand(1);
623 DebugLoc dl = Op.getDebugLoc();
625 // Assume the 3rd operand is a CondCodeSDNode. Add code to check the type of
626 // node if necessary.
627 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
629 return DAG.getNode(MipsISD::FPCmp, dl, MVT::Glue, LHS, RHS,
630 DAG.getConstant(FPCondCCodeToFCC(CC), MVT::i32));
633 // Creates and returns a CMovFPT/F node.
634 static SDValue CreateCMovFP(SelectionDAG &DAG, SDValue Cond, SDValue True,
635 SDValue False, DebugLoc DL) {
636 bool invert = InvertFPCondCode((Mips::CondCode)
637 cast<ConstantSDNode>(Cond.getOperand(2))
640 return DAG.getNode((invert ? MipsISD::CMovFP_F : MipsISD::CMovFP_T), DL,
641 True.getValueType(), True, False, Cond);
644 static SDValue PerformSELECTCombine(SDNode *N, SelectionDAG &DAG,
645 TargetLowering::DAGCombinerInfo &DCI,
646 const MipsSubtarget *Subtarget) {
647 if (DCI.isBeforeLegalizeOps())
650 SDValue SetCC = N->getOperand(0);
652 if ((SetCC.getOpcode() != ISD::SETCC) ||
653 !SetCC.getOperand(0).getValueType().isInteger())
656 SDValue False = N->getOperand(2);
657 EVT FalseTy = False.getValueType();
659 if (!FalseTy.isInteger())
662 ConstantSDNode *CN = dyn_cast<ConstantSDNode>(False);
664 if (!CN || CN->getZExtValue())
667 const DebugLoc DL = N->getDebugLoc();
668 ISD::CondCode CC = cast<CondCodeSDNode>(SetCC.getOperand(2))->get();
669 SDValue True = N->getOperand(1);
671 SetCC = DAG.getSetCC(DL, SetCC.getValueType(), SetCC.getOperand(0),
672 SetCC.getOperand(1), ISD::getSetCCInverse(CC, true));
674 return DAG.getNode(ISD::SELECT, DL, FalseTy, SetCC, False, True);
677 static SDValue PerformANDCombine(SDNode *N, SelectionDAG &DAG,
678 TargetLowering::DAGCombinerInfo &DCI,
679 const MipsSubtarget *Subtarget) {
680 // Pattern match EXT.
681 // $dst = and ((sra or srl) $src , pos), (2**size - 1)
682 // => ext $dst, $src, size, pos
683 if (DCI.isBeforeLegalizeOps() || !Subtarget->hasMips32r2())
686 SDValue ShiftRight = N->getOperand(0), Mask = N->getOperand(1);
687 unsigned ShiftRightOpc = ShiftRight.getOpcode();
689 // Op's first operand must be a shift right.
690 if (ShiftRightOpc != ISD::SRA && ShiftRightOpc != ISD::SRL)
693 // The second operand of the shift must be an immediate.
695 if (!(CN = dyn_cast<ConstantSDNode>(ShiftRight.getOperand(1))))
698 uint64_t Pos = CN->getZExtValue();
699 uint64_t SMPos, SMSize;
701 // Op's second operand must be a shifted mask.
702 if (!(CN = dyn_cast<ConstantSDNode>(Mask)) ||
703 !IsShiftedMask(CN->getZExtValue(), SMPos, SMSize))
706 // Return if the shifted mask does not start at bit 0 or the sum of its size
707 // and Pos exceeds the word's size.
708 EVT ValTy = N->getValueType(0);
709 if (SMPos != 0 || Pos + SMSize > ValTy.getSizeInBits())
712 return DAG.getNode(MipsISD::Ext, N->getDebugLoc(), ValTy,
713 ShiftRight.getOperand(0), DAG.getConstant(Pos, MVT::i32),
714 DAG.getConstant(SMSize, MVT::i32));
717 static SDValue PerformORCombine(SDNode *N, SelectionDAG &DAG,
718 TargetLowering::DAGCombinerInfo &DCI,
719 const MipsSubtarget *Subtarget) {
720 // Pattern match INS.
721 // $dst = or (and $src1 , mask0), (and (shl $src, pos), mask1),
722 // where mask1 = (2**size - 1) << pos, mask0 = ~mask1
723 // => ins $dst, $src, size, pos, $src1
724 if (DCI.isBeforeLegalizeOps() || !Subtarget->hasMips32r2())
727 SDValue And0 = N->getOperand(0), And1 = N->getOperand(1);
728 uint64_t SMPos0, SMSize0, SMPos1, SMSize1;
731 // See if Op's first operand matches (and $src1 , mask0).
732 if (And0.getOpcode() != ISD::AND)
735 if (!(CN = dyn_cast<ConstantSDNode>(And0.getOperand(1))) ||
736 !IsShiftedMask(~CN->getSExtValue(), SMPos0, SMSize0))
739 // See if Op's second operand matches (and (shl $src, pos), mask1).
740 if (And1.getOpcode() != ISD::AND)
743 if (!(CN = dyn_cast<ConstantSDNode>(And1.getOperand(1))) ||
744 !IsShiftedMask(CN->getZExtValue(), SMPos1, SMSize1))
747 // The shift masks must have the same position and size.
748 if (SMPos0 != SMPos1 || SMSize0 != SMSize1)
751 SDValue Shl = And1.getOperand(0);
752 if (Shl.getOpcode() != ISD::SHL)
755 if (!(CN = dyn_cast<ConstantSDNode>(Shl.getOperand(1))))
758 unsigned Shamt = CN->getZExtValue();
760 // Return if the shift amount and the first bit position of mask are not the
762 EVT ValTy = N->getValueType(0);
763 if ((Shamt != SMPos0) || (SMPos0 + SMSize0 > ValTy.getSizeInBits()))
766 return DAG.getNode(MipsISD::Ins, N->getDebugLoc(), ValTy, Shl.getOperand(0),
767 DAG.getConstant(SMPos0, MVT::i32),
768 DAG.getConstant(SMSize0, MVT::i32), And0.getOperand(0));
771 static SDValue PerformADDCombine(SDNode *N, SelectionDAG &DAG,
772 TargetLowering::DAGCombinerInfo &DCI,
773 const MipsSubtarget *Subtarget) {
774 // (add v0, (add v1, abs_lo(tjt))) => (add (add v0, v1), abs_lo(tjt))
776 if (DCI.isBeforeLegalizeOps())
779 SDValue Add = N->getOperand(1);
781 if (Add.getOpcode() != ISD::ADD)
784 SDValue Lo = Add.getOperand(1);
786 if ((Lo.getOpcode() != MipsISD::Lo) ||
787 (Lo.getOperand(0).getOpcode() != ISD::TargetJumpTable))
790 EVT ValTy = N->getValueType(0);
791 DebugLoc DL = N->getDebugLoc();
793 SDValue Add1 = DAG.getNode(ISD::ADD, DL, ValTy, N->getOperand(0),
795 return DAG.getNode(ISD::ADD, DL, ValTy, Add1, Lo);
798 SDValue MipsTargetLowering::PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI)
800 SelectionDAG &DAG = DCI.DAG;
801 unsigned opc = N->getOpcode();
806 return PerformADDECombine(N, DAG, DCI, Subtarget);
808 return PerformSUBECombine(N, DAG, DCI, Subtarget);
811 return PerformDivRemCombine(N, DAG, DCI, Subtarget);
813 return PerformSELECTCombine(N, DAG, DCI, Subtarget);
815 return PerformANDCombine(N, DAG, DCI, Subtarget);
817 return PerformORCombine(N, DAG, DCI, Subtarget);
819 return PerformADDCombine(N, DAG, DCI, Subtarget);
826 MipsTargetLowering::LowerOperationWrapper(SDNode *N,
827 SmallVectorImpl<SDValue> &Results,
828 SelectionDAG &DAG) const {
829 SDValue Res = LowerOperation(SDValue(N, 0), DAG);
831 for (unsigned I = 0, E = Res->getNumValues(); I != E; ++I)
832 Results.push_back(Res.getValue(I));
836 MipsTargetLowering::ReplaceNodeResults(SDNode *N,
837 SmallVectorImpl<SDValue> &Results,
838 SelectionDAG &DAG) const {
839 SDValue Res = LowerOperation(SDValue(N, 0), DAG);
841 for (unsigned I = 0, E = Res->getNumValues(); I != E; ++I)
842 Results.push_back(Res.getValue(I));
845 SDValue MipsTargetLowering::
846 LowerOperation(SDValue Op, SelectionDAG &DAG) const
848 switch (Op.getOpcode())
850 case ISD::BRCOND: return LowerBRCOND(Op, DAG);
851 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
852 case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
853 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
854 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
855 case ISD::JumpTable: return LowerJumpTable(Op, DAG);
856 case ISD::SELECT: return LowerSELECT(Op, DAG);
857 case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
858 case ISD::SETCC: return LowerSETCC(Op, DAG);
859 case ISD::VASTART: return LowerVASTART(Op, DAG);
860 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
861 case ISD::FABS: return LowerFABS(Op, DAG);
862 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
863 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
864 case ISD::MEMBARRIER: return LowerMEMBARRIER(Op, DAG);
865 case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op, DAG);
866 case ISD::SHL_PARTS: return LowerShiftLeftParts(Op, DAG);
867 case ISD::SRA_PARTS: return LowerShiftRightParts(Op, DAG, true);
868 case ISD::SRL_PARTS: return LowerShiftRightParts(Op, DAG, false);
869 case ISD::LOAD: return LowerLOAD(Op, DAG);
870 case ISD::STORE: return LowerSTORE(Op, DAG);
875 //===----------------------------------------------------------------------===//
876 // Lower helper functions
877 //===----------------------------------------------------------------------===//
879 // AddLiveIn - This helper function adds the specified physical register to the
880 // MachineFunction as a live in value. It also creates a corresponding
881 // virtual register for it.
883 AddLiveIn(MachineFunction &MF, unsigned PReg, const TargetRegisterClass *RC)
885 assert(RC->contains(PReg) && "Not the correct regclass!");
886 unsigned VReg = MF.getRegInfo().createVirtualRegister(RC);
887 MF.getRegInfo().addLiveIn(PReg, VReg);
891 // Get fp branch code (not opcode) from condition code.
892 static Mips::FPBranchCode GetFPBranchCodeFromCond(Mips::CondCode CC) {
893 if (CC >= Mips::FCOND_F && CC <= Mips::FCOND_NGT)
894 return Mips::BRANCH_T;
896 assert((CC >= Mips::FCOND_T && CC <= Mips::FCOND_GT) &&
897 "Invalid CondCode.");
899 return Mips::BRANCH_F;
903 static MachineBasicBlock* ExpandCondMov(MachineInstr *MI, MachineBasicBlock *BB,
905 const MipsSubtarget *Subtarget,
906 const TargetInstrInfo *TII,
907 bool isFPCmp, unsigned Opc) {
908 // There is no need to expand CMov instructions if target has
909 // conditional moves.
910 if (Subtarget->hasCondMov())
913 // To "insert" a SELECT_CC instruction, we actually have to insert the
914 // diamond control-flow pattern. The incoming instruction knows the
915 // destination vreg to set, the condition code register to branch on, the
916 // true/false values to select between, and a branch opcode to use.
917 const BasicBlock *LLVM_BB = BB->getBasicBlock();
918 MachineFunction::iterator It = BB;
925 // bNE r1, r0, copy1MBB
926 // fallthrough --> copy0MBB
927 MachineBasicBlock *thisMBB = BB;
928 MachineFunction *F = BB->getParent();
929 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
930 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
931 F->insert(It, copy0MBB);
932 F->insert(It, sinkMBB);
934 // Transfer the remainder of BB and its successor edges to sinkMBB.
935 sinkMBB->splice(sinkMBB->begin(), BB,
936 llvm::next(MachineBasicBlock::iterator(MI)),
938 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
940 // Next, add the true and fallthrough blocks as its successors.
941 BB->addSuccessor(copy0MBB);
942 BB->addSuccessor(sinkMBB);
944 // Emit the right instruction according to the type of the operands compared
946 BuildMI(BB, dl, TII->get(Opc)).addMBB(sinkMBB);
948 BuildMI(BB, dl, TII->get(Opc)).addReg(MI->getOperand(2).getReg())
949 .addReg(Mips::ZERO).addMBB(sinkMBB);
953 // # fallthrough to sinkMBB
956 // Update machine-CFG edges
957 BB->addSuccessor(sinkMBB);
960 // %Result = phi [ %TrueValue, thisMBB ], [ %FalseValue, copy0MBB ]
965 BuildMI(*BB, BB->begin(), dl,
966 TII->get(Mips::PHI), MI->getOperand(0).getReg())
967 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB)
968 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB);
970 BuildMI(*BB, BB->begin(), dl,
971 TII->get(Mips::PHI), MI->getOperand(0).getReg())
972 .addReg(MI->getOperand(3).getReg()).addMBB(thisMBB)
973 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB);
975 MI->eraseFromParent(); // The pseudo instruction is gone now.
980 MipsTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
981 MachineBasicBlock *BB) const {
982 switch (MI->getOpcode()) {
983 default: llvm_unreachable("Unexpected instr type to insert");
984 case Mips::ATOMIC_LOAD_ADD_I8:
985 case Mips::ATOMIC_LOAD_ADD_I8_P8:
986 return EmitAtomicBinaryPartword(MI, BB, 1, Mips::ADDu);
987 case Mips::ATOMIC_LOAD_ADD_I16:
988 case Mips::ATOMIC_LOAD_ADD_I16_P8:
989 return EmitAtomicBinaryPartword(MI, BB, 2, Mips::ADDu);
990 case Mips::ATOMIC_LOAD_ADD_I32:
991 case Mips::ATOMIC_LOAD_ADD_I32_P8:
992 return EmitAtomicBinary(MI, BB, 4, Mips::ADDu);
993 case Mips::ATOMIC_LOAD_ADD_I64:
994 case Mips::ATOMIC_LOAD_ADD_I64_P8:
995 return EmitAtomicBinary(MI, BB, 8, Mips::DADDu);
997 case Mips::ATOMIC_LOAD_AND_I8:
998 case Mips::ATOMIC_LOAD_AND_I8_P8:
999 return EmitAtomicBinaryPartword(MI, BB, 1, Mips::AND);
1000 case Mips::ATOMIC_LOAD_AND_I16:
1001 case Mips::ATOMIC_LOAD_AND_I16_P8:
1002 return EmitAtomicBinaryPartword(MI, BB, 2, Mips::AND);
1003 case Mips::ATOMIC_LOAD_AND_I32:
1004 case Mips::ATOMIC_LOAD_AND_I32_P8:
1005 return EmitAtomicBinary(MI, BB, 4, Mips::AND);
1006 case Mips::ATOMIC_LOAD_AND_I64:
1007 case Mips::ATOMIC_LOAD_AND_I64_P8:
1008 return EmitAtomicBinary(MI, BB, 8, Mips::AND64);
1010 case Mips::ATOMIC_LOAD_OR_I8:
1011 case Mips::ATOMIC_LOAD_OR_I8_P8:
1012 return EmitAtomicBinaryPartword(MI, BB, 1, Mips::OR);
1013 case Mips::ATOMIC_LOAD_OR_I16:
1014 case Mips::ATOMIC_LOAD_OR_I16_P8:
1015 return EmitAtomicBinaryPartword(MI, BB, 2, Mips::OR);
1016 case Mips::ATOMIC_LOAD_OR_I32:
1017 case Mips::ATOMIC_LOAD_OR_I32_P8:
1018 return EmitAtomicBinary(MI, BB, 4, Mips::OR);
1019 case Mips::ATOMIC_LOAD_OR_I64:
1020 case Mips::ATOMIC_LOAD_OR_I64_P8:
1021 return EmitAtomicBinary(MI, BB, 8, Mips::OR64);
1023 case Mips::ATOMIC_LOAD_XOR_I8:
1024 case Mips::ATOMIC_LOAD_XOR_I8_P8:
1025 return EmitAtomicBinaryPartword(MI, BB, 1, Mips::XOR);
1026 case Mips::ATOMIC_LOAD_XOR_I16:
1027 case Mips::ATOMIC_LOAD_XOR_I16_P8:
1028 return EmitAtomicBinaryPartword(MI, BB, 2, Mips::XOR);
1029 case Mips::ATOMIC_LOAD_XOR_I32:
1030 case Mips::ATOMIC_LOAD_XOR_I32_P8:
1031 return EmitAtomicBinary(MI, BB, 4, Mips::XOR);
1032 case Mips::ATOMIC_LOAD_XOR_I64:
1033 case Mips::ATOMIC_LOAD_XOR_I64_P8:
1034 return EmitAtomicBinary(MI, BB, 8, Mips::XOR64);
1036 case Mips::ATOMIC_LOAD_NAND_I8:
1037 case Mips::ATOMIC_LOAD_NAND_I8_P8:
1038 return EmitAtomicBinaryPartword(MI, BB, 1, 0, true);
1039 case Mips::ATOMIC_LOAD_NAND_I16:
1040 case Mips::ATOMIC_LOAD_NAND_I16_P8:
1041 return EmitAtomicBinaryPartword(MI, BB, 2, 0, true);
1042 case Mips::ATOMIC_LOAD_NAND_I32:
1043 case Mips::ATOMIC_LOAD_NAND_I32_P8:
1044 return EmitAtomicBinary(MI, BB, 4, 0, true);
1045 case Mips::ATOMIC_LOAD_NAND_I64:
1046 case Mips::ATOMIC_LOAD_NAND_I64_P8:
1047 return EmitAtomicBinary(MI, BB, 8, 0, true);
1049 case Mips::ATOMIC_LOAD_SUB_I8:
1050 case Mips::ATOMIC_LOAD_SUB_I8_P8:
1051 return EmitAtomicBinaryPartword(MI, BB, 1, Mips::SUBu);
1052 case Mips::ATOMIC_LOAD_SUB_I16:
1053 case Mips::ATOMIC_LOAD_SUB_I16_P8:
1054 return EmitAtomicBinaryPartword(MI, BB, 2, Mips::SUBu);
1055 case Mips::ATOMIC_LOAD_SUB_I32:
1056 case Mips::ATOMIC_LOAD_SUB_I32_P8:
1057 return EmitAtomicBinary(MI, BB, 4, Mips::SUBu);
1058 case Mips::ATOMIC_LOAD_SUB_I64:
1059 case Mips::ATOMIC_LOAD_SUB_I64_P8:
1060 return EmitAtomicBinary(MI, BB, 8, Mips::DSUBu);
1062 case Mips::ATOMIC_SWAP_I8:
1063 case Mips::ATOMIC_SWAP_I8_P8:
1064 return EmitAtomicBinaryPartword(MI, BB, 1, 0);
1065 case Mips::ATOMIC_SWAP_I16:
1066 case Mips::ATOMIC_SWAP_I16_P8:
1067 return EmitAtomicBinaryPartword(MI, BB, 2, 0);
1068 case Mips::ATOMIC_SWAP_I32:
1069 case Mips::ATOMIC_SWAP_I32_P8:
1070 return EmitAtomicBinary(MI, BB, 4, 0);
1071 case Mips::ATOMIC_SWAP_I64:
1072 case Mips::ATOMIC_SWAP_I64_P8:
1073 return EmitAtomicBinary(MI, BB, 8, 0);
1075 case Mips::ATOMIC_CMP_SWAP_I8:
1076 case Mips::ATOMIC_CMP_SWAP_I8_P8:
1077 return EmitAtomicCmpSwapPartword(MI, BB, 1);
1078 case Mips::ATOMIC_CMP_SWAP_I16:
1079 case Mips::ATOMIC_CMP_SWAP_I16_P8:
1080 return EmitAtomicCmpSwapPartword(MI, BB, 2);
1081 case Mips::ATOMIC_CMP_SWAP_I32:
1082 case Mips::ATOMIC_CMP_SWAP_I32_P8:
1083 return EmitAtomicCmpSwap(MI, BB, 4);
1084 case Mips::ATOMIC_CMP_SWAP_I64:
1085 case Mips::ATOMIC_CMP_SWAP_I64_P8:
1086 return EmitAtomicCmpSwap(MI, BB, 8);
1090 // This function also handles Mips::ATOMIC_SWAP_I32 (when BinOpcode == 0), and
1091 // Mips::ATOMIC_LOAD_NAND_I32 (when Nand == true)
1093 MipsTargetLowering::EmitAtomicBinary(MachineInstr *MI, MachineBasicBlock *BB,
1094 unsigned Size, unsigned BinOpcode,
1096 assert((Size == 4 || Size == 8) && "Unsupported size for EmitAtomicBinary.");
1098 MachineFunction *MF = BB->getParent();
1099 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1100 const TargetRegisterClass *RC = getRegClassFor(MVT::getIntegerVT(Size * 8));
1101 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1102 DebugLoc dl = MI->getDebugLoc();
1103 unsigned LL, SC, AND, NOR, ZERO, BEQ;
1106 LL = IsN64 ? Mips::LL_P8 : Mips::LL;
1107 SC = IsN64 ? Mips::SC_P8 : Mips::SC;
1114 LL = IsN64 ? Mips::LLD_P8 : Mips::LLD;
1115 SC = IsN64 ? Mips::SCD_P8 : Mips::SCD;
1118 ZERO = Mips::ZERO_64;
1122 unsigned OldVal = MI->getOperand(0).getReg();
1123 unsigned Ptr = MI->getOperand(1).getReg();
1124 unsigned Incr = MI->getOperand(2).getReg();
1126 unsigned StoreVal = RegInfo.createVirtualRegister(RC);
1127 unsigned AndRes = RegInfo.createVirtualRegister(RC);
1128 unsigned Success = RegInfo.createVirtualRegister(RC);
1130 // insert new blocks after the current block
1131 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1132 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1133 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1134 MachineFunction::iterator It = BB;
1136 MF->insert(It, loopMBB);
1137 MF->insert(It, exitMBB);
1139 // Transfer the remainder of BB and its successor edges to exitMBB.
1140 exitMBB->splice(exitMBB->begin(), BB,
1141 llvm::next(MachineBasicBlock::iterator(MI)),
1143 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1147 // fallthrough --> loopMBB
1148 BB->addSuccessor(loopMBB);
1149 loopMBB->addSuccessor(loopMBB);
1150 loopMBB->addSuccessor(exitMBB);
1153 // ll oldval, 0(ptr)
1154 // <binop> storeval, oldval, incr
1155 // sc success, storeval, 0(ptr)
1156 // beq success, $0, loopMBB
1158 BuildMI(BB, dl, TII->get(LL), OldVal).addReg(Ptr).addImm(0);
1160 // and andres, oldval, incr
1161 // nor storeval, $0, andres
1162 BuildMI(BB, dl, TII->get(AND), AndRes).addReg(OldVal).addReg(Incr);
1163 BuildMI(BB, dl, TII->get(NOR), StoreVal).addReg(ZERO).addReg(AndRes);
1164 } else if (BinOpcode) {
1165 // <binop> storeval, oldval, incr
1166 BuildMI(BB, dl, TII->get(BinOpcode), StoreVal).addReg(OldVal).addReg(Incr);
1170 BuildMI(BB, dl, TII->get(SC), Success).addReg(StoreVal).addReg(Ptr).addImm(0);
1171 BuildMI(BB, dl, TII->get(BEQ)).addReg(Success).addReg(ZERO).addMBB(loopMBB);
1173 MI->eraseFromParent(); // The instruction is gone now.
1179 MipsTargetLowering::EmitAtomicBinaryPartword(MachineInstr *MI,
1180 MachineBasicBlock *BB,
1181 unsigned Size, unsigned BinOpcode,
1183 assert((Size == 1 || Size == 2) &&
1184 "Unsupported size for EmitAtomicBinaryPartial.");
1186 MachineFunction *MF = BB->getParent();
1187 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1188 const TargetRegisterClass *RC = getRegClassFor(MVT::i32);
1189 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1190 DebugLoc dl = MI->getDebugLoc();
1191 unsigned LL = IsN64 ? Mips::LL_P8 : Mips::LL;
1192 unsigned SC = IsN64 ? Mips::SC_P8 : Mips::SC;
1194 unsigned Dest = MI->getOperand(0).getReg();
1195 unsigned Ptr = MI->getOperand(1).getReg();
1196 unsigned Incr = MI->getOperand(2).getReg();
1198 unsigned AlignedAddr = RegInfo.createVirtualRegister(RC);
1199 unsigned ShiftAmt = RegInfo.createVirtualRegister(RC);
1200 unsigned Mask = RegInfo.createVirtualRegister(RC);
1201 unsigned Mask2 = RegInfo.createVirtualRegister(RC);
1202 unsigned NewVal = RegInfo.createVirtualRegister(RC);
1203 unsigned OldVal = RegInfo.createVirtualRegister(RC);
1204 unsigned Incr2 = RegInfo.createVirtualRegister(RC);
1205 unsigned MaskLSB2 = RegInfo.createVirtualRegister(RC);
1206 unsigned PtrLSB2 = RegInfo.createVirtualRegister(RC);
1207 unsigned MaskUpper = RegInfo.createVirtualRegister(RC);
1208 unsigned AndRes = RegInfo.createVirtualRegister(RC);
1209 unsigned BinOpRes = RegInfo.createVirtualRegister(RC);
1210 unsigned MaskedOldVal0 = RegInfo.createVirtualRegister(RC);
1211 unsigned StoreVal = RegInfo.createVirtualRegister(RC);
1212 unsigned MaskedOldVal1 = RegInfo.createVirtualRegister(RC);
1213 unsigned SrlRes = RegInfo.createVirtualRegister(RC);
1214 unsigned SllRes = RegInfo.createVirtualRegister(RC);
1215 unsigned Success = RegInfo.createVirtualRegister(RC);
1217 // insert new blocks after the current block
1218 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1219 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1220 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1221 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1222 MachineFunction::iterator It = BB;
1224 MF->insert(It, loopMBB);
1225 MF->insert(It, sinkMBB);
1226 MF->insert(It, exitMBB);
1228 // Transfer the remainder of BB and its successor edges to exitMBB.
1229 exitMBB->splice(exitMBB->begin(), BB,
1230 llvm::next(MachineBasicBlock::iterator(MI)), BB->end());
1231 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1233 BB->addSuccessor(loopMBB);
1234 loopMBB->addSuccessor(loopMBB);
1235 loopMBB->addSuccessor(sinkMBB);
1236 sinkMBB->addSuccessor(exitMBB);
1239 // addiu masklsb2,$0,-4 # 0xfffffffc
1240 // and alignedaddr,ptr,masklsb2
1241 // andi ptrlsb2,ptr,3
1242 // sll shiftamt,ptrlsb2,3
1243 // ori maskupper,$0,255 # 0xff
1244 // sll mask,maskupper,shiftamt
1245 // nor mask2,$0,mask
1246 // sll incr2,incr,shiftamt
1248 int64_t MaskImm = (Size == 1) ? 255 : 65535;
1249 BuildMI(BB, dl, TII->get(Mips::ADDiu), MaskLSB2)
1250 .addReg(Mips::ZERO).addImm(-4);
1251 BuildMI(BB, dl, TII->get(Mips::AND), AlignedAddr)
1252 .addReg(Ptr).addReg(MaskLSB2);
1253 BuildMI(BB, dl, TII->get(Mips::ANDi), PtrLSB2).addReg(Ptr).addImm(3);
1254 BuildMI(BB, dl, TII->get(Mips::SLL), ShiftAmt).addReg(PtrLSB2).addImm(3);
1255 BuildMI(BB, dl, TII->get(Mips::ORi), MaskUpper)
1256 .addReg(Mips::ZERO).addImm(MaskImm);
1257 BuildMI(BB, dl, TII->get(Mips::SLLV), Mask)
1258 .addReg(ShiftAmt).addReg(MaskUpper);
1259 BuildMI(BB, dl, TII->get(Mips::NOR), Mask2).addReg(Mips::ZERO).addReg(Mask);
1260 BuildMI(BB, dl, TII->get(Mips::SLLV), Incr2).addReg(ShiftAmt).addReg(Incr);
1262 // atomic.load.binop
1264 // ll oldval,0(alignedaddr)
1265 // binop binopres,oldval,incr2
1266 // and newval,binopres,mask
1267 // and maskedoldval0,oldval,mask2
1268 // or storeval,maskedoldval0,newval
1269 // sc success,storeval,0(alignedaddr)
1270 // beq success,$0,loopMBB
1274 // ll oldval,0(alignedaddr)
1275 // and newval,incr2,mask
1276 // and maskedoldval0,oldval,mask2
1277 // or storeval,maskedoldval0,newval
1278 // sc success,storeval,0(alignedaddr)
1279 // beq success,$0,loopMBB
1282 BuildMI(BB, dl, TII->get(LL), OldVal).addReg(AlignedAddr).addImm(0);
1284 // and andres, oldval, incr2
1285 // nor binopres, $0, andres
1286 // and newval, binopres, mask
1287 BuildMI(BB, dl, TII->get(Mips::AND), AndRes).addReg(OldVal).addReg(Incr2);
1288 BuildMI(BB, dl, TII->get(Mips::NOR), BinOpRes)
1289 .addReg(Mips::ZERO).addReg(AndRes);
1290 BuildMI(BB, dl, TII->get(Mips::AND), NewVal).addReg(BinOpRes).addReg(Mask);
1291 } else if (BinOpcode) {
1292 // <binop> binopres, oldval, incr2
1293 // and newval, binopres, mask
1294 BuildMI(BB, dl, TII->get(BinOpcode), BinOpRes).addReg(OldVal).addReg(Incr2);
1295 BuildMI(BB, dl, TII->get(Mips::AND), NewVal).addReg(BinOpRes).addReg(Mask);
1296 } else {// atomic.swap
1297 // and newval, incr2, mask
1298 BuildMI(BB, dl, TII->get(Mips::AND), NewVal).addReg(Incr2).addReg(Mask);
1301 BuildMI(BB, dl, TII->get(Mips::AND), MaskedOldVal0)
1302 .addReg(OldVal).addReg(Mask2);
1303 BuildMI(BB, dl, TII->get(Mips::OR), StoreVal)
1304 .addReg(MaskedOldVal0).addReg(NewVal);
1305 BuildMI(BB, dl, TII->get(SC), Success)
1306 .addReg(StoreVal).addReg(AlignedAddr).addImm(0);
1307 BuildMI(BB, dl, TII->get(Mips::BEQ))
1308 .addReg(Success).addReg(Mips::ZERO).addMBB(loopMBB);
1311 // and maskedoldval1,oldval,mask
1312 // srl srlres,maskedoldval1,shiftamt
1313 // sll sllres,srlres,24
1314 // sra dest,sllres,24
1316 int64_t ShiftImm = (Size == 1) ? 24 : 16;
1318 BuildMI(BB, dl, TII->get(Mips::AND), MaskedOldVal1)
1319 .addReg(OldVal).addReg(Mask);
1320 BuildMI(BB, dl, TII->get(Mips::SRLV), SrlRes)
1321 .addReg(ShiftAmt).addReg(MaskedOldVal1);
1322 BuildMI(BB, dl, TII->get(Mips::SLL), SllRes)
1323 .addReg(SrlRes).addImm(ShiftImm);
1324 BuildMI(BB, dl, TII->get(Mips::SRA), Dest)
1325 .addReg(SllRes).addImm(ShiftImm);
1327 MI->eraseFromParent(); // The instruction is gone now.
1333 MipsTargetLowering::EmitAtomicCmpSwap(MachineInstr *MI,
1334 MachineBasicBlock *BB,
1335 unsigned Size) const {
1336 assert((Size == 4 || Size == 8) && "Unsupported size for EmitAtomicCmpSwap.");
1338 MachineFunction *MF = BB->getParent();
1339 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1340 const TargetRegisterClass *RC = getRegClassFor(MVT::getIntegerVT(Size * 8));
1341 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1342 DebugLoc dl = MI->getDebugLoc();
1343 unsigned LL, SC, ZERO, BNE, BEQ;
1346 LL = IsN64 ? Mips::LL_P8 : Mips::LL;
1347 SC = IsN64 ? Mips::SC_P8 : Mips::SC;
1353 LL = IsN64 ? Mips::LLD_P8 : Mips::LLD;
1354 SC = IsN64 ? Mips::SCD_P8 : Mips::SCD;
1355 ZERO = Mips::ZERO_64;
1360 unsigned Dest = MI->getOperand(0).getReg();
1361 unsigned Ptr = MI->getOperand(1).getReg();
1362 unsigned OldVal = MI->getOperand(2).getReg();
1363 unsigned NewVal = MI->getOperand(3).getReg();
1365 unsigned Success = RegInfo.createVirtualRegister(RC);
1367 // insert new blocks after the current block
1368 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1369 MachineBasicBlock *loop1MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1370 MachineBasicBlock *loop2MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1371 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1372 MachineFunction::iterator It = BB;
1374 MF->insert(It, loop1MBB);
1375 MF->insert(It, loop2MBB);
1376 MF->insert(It, exitMBB);
1378 // Transfer the remainder of BB and its successor edges to exitMBB.
1379 exitMBB->splice(exitMBB->begin(), BB,
1380 llvm::next(MachineBasicBlock::iterator(MI)), BB->end());
1381 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1385 // fallthrough --> loop1MBB
1386 BB->addSuccessor(loop1MBB);
1387 loop1MBB->addSuccessor(exitMBB);
1388 loop1MBB->addSuccessor(loop2MBB);
1389 loop2MBB->addSuccessor(loop1MBB);
1390 loop2MBB->addSuccessor(exitMBB);
1394 // bne dest, oldval, exitMBB
1396 BuildMI(BB, dl, TII->get(LL), Dest).addReg(Ptr).addImm(0);
1397 BuildMI(BB, dl, TII->get(BNE))
1398 .addReg(Dest).addReg(OldVal).addMBB(exitMBB);
1401 // sc success, newval, 0(ptr)
1402 // beq success, $0, loop1MBB
1404 BuildMI(BB, dl, TII->get(SC), Success)
1405 .addReg(NewVal).addReg(Ptr).addImm(0);
1406 BuildMI(BB, dl, TII->get(BEQ))
1407 .addReg(Success).addReg(ZERO).addMBB(loop1MBB);
1409 MI->eraseFromParent(); // The instruction is gone now.
1415 MipsTargetLowering::EmitAtomicCmpSwapPartword(MachineInstr *MI,
1416 MachineBasicBlock *BB,
1417 unsigned Size) const {
1418 assert((Size == 1 || Size == 2) &&
1419 "Unsupported size for EmitAtomicCmpSwapPartial.");
1421 MachineFunction *MF = BB->getParent();
1422 MachineRegisterInfo &RegInfo = MF->getRegInfo();
1423 const TargetRegisterClass *RC = getRegClassFor(MVT::i32);
1424 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1425 DebugLoc dl = MI->getDebugLoc();
1426 unsigned LL = IsN64 ? Mips::LL_P8 : Mips::LL;
1427 unsigned SC = IsN64 ? Mips::SC_P8 : Mips::SC;
1429 unsigned Dest = MI->getOperand(0).getReg();
1430 unsigned Ptr = MI->getOperand(1).getReg();
1431 unsigned CmpVal = MI->getOperand(2).getReg();
1432 unsigned NewVal = MI->getOperand(3).getReg();
1434 unsigned AlignedAddr = RegInfo.createVirtualRegister(RC);
1435 unsigned ShiftAmt = RegInfo.createVirtualRegister(RC);
1436 unsigned Mask = RegInfo.createVirtualRegister(RC);
1437 unsigned Mask2 = RegInfo.createVirtualRegister(RC);
1438 unsigned ShiftedCmpVal = RegInfo.createVirtualRegister(RC);
1439 unsigned OldVal = RegInfo.createVirtualRegister(RC);
1440 unsigned MaskedOldVal0 = RegInfo.createVirtualRegister(RC);
1441 unsigned ShiftedNewVal = RegInfo.createVirtualRegister(RC);
1442 unsigned MaskLSB2 = RegInfo.createVirtualRegister(RC);
1443 unsigned PtrLSB2 = RegInfo.createVirtualRegister(RC);
1444 unsigned MaskUpper = RegInfo.createVirtualRegister(RC);
1445 unsigned MaskedCmpVal = RegInfo.createVirtualRegister(RC);
1446 unsigned MaskedNewVal = RegInfo.createVirtualRegister(RC);
1447 unsigned MaskedOldVal1 = RegInfo.createVirtualRegister(RC);
1448 unsigned StoreVal = RegInfo.createVirtualRegister(RC);
1449 unsigned SrlRes = RegInfo.createVirtualRegister(RC);
1450 unsigned SllRes = RegInfo.createVirtualRegister(RC);
1451 unsigned Success = RegInfo.createVirtualRegister(RC);
1453 // insert new blocks after the current block
1454 const BasicBlock *LLVM_BB = BB->getBasicBlock();
1455 MachineBasicBlock *loop1MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1456 MachineBasicBlock *loop2MBB = MF->CreateMachineBasicBlock(LLVM_BB);
1457 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1458 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
1459 MachineFunction::iterator It = BB;
1461 MF->insert(It, loop1MBB);
1462 MF->insert(It, loop2MBB);
1463 MF->insert(It, sinkMBB);
1464 MF->insert(It, exitMBB);
1466 // Transfer the remainder of BB and its successor edges to exitMBB.
1467 exitMBB->splice(exitMBB->begin(), BB,
1468 llvm::next(MachineBasicBlock::iterator(MI)), BB->end());
1469 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
1471 BB->addSuccessor(loop1MBB);
1472 loop1MBB->addSuccessor(sinkMBB);
1473 loop1MBB->addSuccessor(loop2MBB);
1474 loop2MBB->addSuccessor(loop1MBB);
1475 loop2MBB->addSuccessor(sinkMBB);
1476 sinkMBB->addSuccessor(exitMBB);
1478 // FIXME: computation of newval2 can be moved to loop2MBB.
1480 // addiu masklsb2,$0,-4 # 0xfffffffc
1481 // and alignedaddr,ptr,masklsb2
1482 // andi ptrlsb2,ptr,3
1483 // sll shiftamt,ptrlsb2,3
1484 // ori maskupper,$0,255 # 0xff
1485 // sll mask,maskupper,shiftamt
1486 // nor mask2,$0,mask
1487 // andi maskedcmpval,cmpval,255
1488 // sll shiftedcmpval,maskedcmpval,shiftamt
1489 // andi maskednewval,newval,255
1490 // sll shiftednewval,maskednewval,shiftamt
1491 int64_t MaskImm = (Size == 1) ? 255 : 65535;
1492 BuildMI(BB, dl, TII->get(Mips::ADDiu), MaskLSB2)
1493 .addReg(Mips::ZERO).addImm(-4);
1494 BuildMI(BB, dl, TII->get(Mips::AND), AlignedAddr)
1495 .addReg(Ptr).addReg(MaskLSB2);
1496 BuildMI(BB, dl, TII->get(Mips::ANDi), PtrLSB2).addReg(Ptr).addImm(3);
1497 BuildMI(BB, dl, TII->get(Mips::SLL), ShiftAmt).addReg(PtrLSB2).addImm(3);
1498 BuildMI(BB, dl, TII->get(Mips::ORi), MaskUpper)
1499 .addReg(Mips::ZERO).addImm(MaskImm);
1500 BuildMI(BB, dl, TII->get(Mips::SLLV), Mask)
1501 .addReg(ShiftAmt).addReg(MaskUpper);
1502 BuildMI(BB, dl, TII->get(Mips::NOR), Mask2).addReg(Mips::ZERO).addReg(Mask);
1503 BuildMI(BB, dl, TII->get(Mips::ANDi), MaskedCmpVal)
1504 .addReg(CmpVal).addImm(MaskImm);
1505 BuildMI(BB, dl, TII->get(Mips::SLLV), ShiftedCmpVal)
1506 .addReg(ShiftAmt).addReg(MaskedCmpVal);
1507 BuildMI(BB, dl, TII->get(Mips::ANDi), MaskedNewVal)
1508 .addReg(NewVal).addImm(MaskImm);
1509 BuildMI(BB, dl, TII->get(Mips::SLLV), ShiftedNewVal)
1510 .addReg(ShiftAmt).addReg(MaskedNewVal);
1513 // ll oldval,0(alginedaddr)
1514 // and maskedoldval0,oldval,mask
1515 // bne maskedoldval0,shiftedcmpval,sinkMBB
1517 BuildMI(BB, dl, TII->get(LL), OldVal).addReg(AlignedAddr).addImm(0);
1518 BuildMI(BB, dl, TII->get(Mips::AND), MaskedOldVal0)
1519 .addReg(OldVal).addReg(Mask);
1520 BuildMI(BB, dl, TII->get(Mips::BNE))
1521 .addReg(MaskedOldVal0).addReg(ShiftedCmpVal).addMBB(sinkMBB);
1524 // and maskedoldval1,oldval,mask2
1525 // or storeval,maskedoldval1,shiftednewval
1526 // sc success,storeval,0(alignedaddr)
1527 // beq success,$0,loop1MBB
1529 BuildMI(BB, dl, TII->get(Mips::AND), MaskedOldVal1)
1530 .addReg(OldVal).addReg(Mask2);
1531 BuildMI(BB, dl, TII->get(Mips::OR), StoreVal)
1532 .addReg(MaskedOldVal1).addReg(ShiftedNewVal);
1533 BuildMI(BB, dl, TII->get(SC), Success)
1534 .addReg(StoreVal).addReg(AlignedAddr).addImm(0);
1535 BuildMI(BB, dl, TII->get(Mips::BEQ))
1536 .addReg(Success).addReg(Mips::ZERO).addMBB(loop1MBB);
1539 // srl srlres,maskedoldval0,shiftamt
1540 // sll sllres,srlres,24
1541 // sra dest,sllres,24
1543 int64_t ShiftImm = (Size == 1) ? 24 : 16;
1545 BuildMI(BB, dl, TII->get(Mips::SRLV), SrlRes)
1546 .addReg(ShiftAmt).addReg(MaskedOldVal0);
1547 BuildMI(BB, dl, TII->get(Mips::SLL), SllRes)
1548 .addReg(SrlRes).addImm(ShiftImm);
1549 BuildMI(BB, dl, TII->get(Mips::SRA), Dest)
1550 .addReg(SllRes).addImm(ShiftImm);
1552 MI->eraseFromParent(); // The instruction is gone now.
1557 //===----------------------------------------------------------------------===//
1558 // Misc Lower Operation implementation
1559 //===----------------------------------------------------------------------===//
1560 SDValue MipsTargetLowering::
1561 LowerBRCOND(SDValue Op, SelectionDAG &DAG) const
1563 // The first operand is the chain, the second is the condition, the third is
1564 // the block to branch to if the condition is true.
1565 SDValue Chain = Op.getOperand(0);
1566 SDValue Dest = Op.getOperand(2);
1567 DebugLoc dl = Op.getDebugLoc();
1569 SDValue CondRes = CreateFPCmp(DAG, Op.getOperand(1));
1571 // Return if flag is not set by a floating point comparison.
1572 if (CondRes.getOpcode() != MipsISD::FPCmp)
1575 SDValue CCNode = CondRes.getOperand(2);
1577 (Mips::CondCode)cast<ConstantSDNode>(CCNode)->getZExtValue();
1578 SDValue BrCode = DAG.getConstant(GetFPBranchCodeFromCond(CC), MVT::i32);
1580 return DAG.getNode(MipsISD::FPBrcond, dl, Op.getValueType(), Chain, BrCode,
1584 SDValue MipsTargetLowering::
1585 LowerSELECT(SDValue Op, SelectionDAG &DAG) const
1587 SDValue Cond = CreateFPCmp(DAG, Op.getOperand(0));
1589 // Return if flag is not set by a floating point comparison.
1590 if (Cond.getOpcode() != MipsISD::FPCmp)
1593 return CreateCMovFP(DAG, Cond, Op.getOperand(1), Op.getOperand(2),
1597 SDValue MipsTargetLowering::
1598 LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const
1600 DebugLoc DL = Op.getDebugLoc();
1601 EVT Ty = Op.getOperand(0).getValueType();
1602 SDValue Cond = DAG.getNode(ISD::SETCC, DL, getSetCCResultType(Ty),
1603 Op.getOperand(0), Op.getOperand(1),
1606 return DAG.getNode(ISD::SELECT, DL, Op.getValueType(), Cond, Op.getOperand(2),
1610 SDValue MipsTargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
1611 SDValue Cond = CreateFPCmp(DAG, Op);
1613 assert(Cond.getOpcode() == MipsISD::FPCmp &&
1614 "Floating point operand expected.");
1616 SDValue True = DAG.getConstant(1, MVT::i32);
1617 SDValue False = DAG.getConstant(0, MVT::i32);
1619 return CreateCMovFP(DAG, Cond, True, False, Op.getDebugLoc());
1622 SDValue MipsTargetLowering::LowerGlobalAddress(SDValue Op,
1623 SelectionDAG &DAG) const {
1624 // FIXME there isn't actually debug info here
1625 DebugLoc dl = Op.getDebugLoc();
1626 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
1628 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !IsN64) {
1629 SDVTList VTs = DAG.getVTList(MVT::i32);
1631 const MipsTargetObjectFile &TLOF =
1632 (const MipsTargetObjectFile&)getObjFileLowering();
1634 // %gp_rel relocation
1635 if (TLOF.IsGlobalInSmallSection(GV, getTargetMachine())) {
1636 SDValue GA = DAG.getTargetGlobalAddress(GV, dl, MVT::i32, 0,
1638 SDValue GPRelNode = DAG.getNode(MipsISD::GPRel, dl, VTs, &GA, 1);
1639 SDValue GPReg = DAG.getRegister(Mips::GP, MVT::i32);
1640 return DAG.getNode(ISD::ADD, dl, MVT::i32, GPReg, GPRelNode);
1642 // %hi/%lo relocation
1643 SDValue GAHi = DAG.getTargetGlobalAddress(GV, dl, MVT::i32, 0,
1645 SDValue GALo = DAG.getTargetGlobalAddress(GV, dl, MVT::i32, 0,
1647 SDValue HiPart = DAG.getNode(MipsISD::Hi, dl, VTs, &GAHi, 1);
1648 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, MVT::i32, GALo);
1649 return DAG.getNode(ISD::ADD, dl, MVT::i32, HiPart, Lo);
1652 EVT ValTy = Op.getValueType();
1653 bool HasGotOfst = (GV->hasInternalLinkage() ||
1654 (GV->hasLocalLinkage() && !isa<Function>(GV)));
1655 unsigned GotFlag = HasMips64 ?
1656 (HasGotOfst ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT_DISP) :
1657 (HasGotOfst ? MipsII::MO_GOT : MipsII::MO_GOT16);
1658 SDValue GA = DAG.getTargetGlobalAddress(GV, dl, ValTy, 0, GotFlag);
1659 GA = DAG.getNode(MipsISD::Wrapper, dl, ValTy, GetGlobalReg(DAG, ValTy), GA);
1660 SDValue ResNode = DAG.getLoad(ValTy, dl, DAG.getEntryNode(), GA,
1661 MachinePointerInfo(), false, false, false, 0);
1662 // On functions and global targets not internal linked only
1663 // a load from got/GP is necessary for PIC to work.
1666 SDValue GALo = DAG.getTargetGlobalAddress(GV, dl, ValTy, 0,
1667 HasMips64 ? MipsII::MO_GOT_OFST :
1669 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, ValTy, GALo);
1670 return DAG.getNode(ISD::ADD, dl, ValTy, ResNode, Lo);
1673 SDValue MipsTargetLowering::LowerBlockAddress(SDValue Op,
1674 SelectionDAG &DAG) const {
1675 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
1676 // FIXME there isn't actually debug info here
1677 DebugLoc dl = Op.getDebugLoc();
1679 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !IsN64) {
1680 // %hi/%lo relocation
1681 SDValue BAHi = DAG.getTargetBlockAddress(BA, MVT::i32, 0, MipsII::MO_ABS_HI);
1682 SDValue BALo = DAG.getTargetBlockAddress(BA, MVT::i32, 0, MipsII::MO_ABS_LO);
1683 SDValue Hi = DAG.getNode(MipsISD::Hi, dl, MVT::i32, BAHi);
1684 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, MVT::i32, BALo);
1685 return DAG.getNode(ISD::ADD, dl, MVT::i32, Hi, Lo);
1688 EVT ValTy = Op.getValueType();
1689 unsigned GOTFlag = HasMips64 ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT;
1690 unsigned OFSTFlag = HasMips64 ? MipsII::MO_GOT_OFST : MipsII::MO_ABS_LO;
1691 SDValue BAGOTOffset = DAG.getTargetBlockAddress(BA, ValTy, 0, GOTFlag);
1692 BAGOTOffset = DAG.getNode(MipsISD::Wrapper, dl, ValTy,
1693 GetGlobalReg(DAG, ValTy), BAGOTOffset);
1694 SDValue BALOOffset = DAG.getTargetBlockAddress(BA, ValTy, 0, OFSTFlag);
1695 SDValue Load = DAG.getLoad(ValTy, dl, DAG.getEntryNode(), BAGOTOffset,
1696 MachinePointerInfo(), false, false, false, 0);
1697 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, ValTy, BALOOffset);
1698 return DAG.getNode(ISD::ADD, dl, ValTy, Load, Lo);
1701 SDValue MipsTargetLowering::
1702 LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const
1704 // If the relocation model is PIC, use the General Dynamic TLS Model or
1705 // Local Dynamic TLS model, otherwise use the Initial Exec or
1706 // Local Exec TLS Model.
1708 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
1709 DebugLoc dl = GA->getDebugLoc();
1710 const GlobalValue *GV = GA->getGlobal();
1711 EVT PtrVT = getPointerTy();
1713 TLSModel::Model model = getTargetMachine().getTLSModel(GV);
1715 if (model == TLSModel::GeneralDynamic || model == TLSModel::LocalDynamic) {
1716 // General Dynamic and Local Dynamic TLS Model.
1717 unsigned Flag = (model == TLSModel::LocalDynamic) ? MipsII::MO_TLSLDM
1720 SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, Flag);
1721 SDValue Argument = DAG.getNode(MipsISD::Wrapper, dl, PtrVT,
1722 GetGlobalReg(DAG, PtrVT), TGA);
1723 unsigned PtrSize = PtrVT.getSizeInBits();
1724 IntegerType *PtrTy = Type::getIntNTy(*DAG.getContext(), PtrSize);
1726 SDValue TlsGetAddr = DAG.getExternalSymbol("__tls_get_addr", PtrVT);
1730 Entry.Node = Argument;
1732 Args.push_back(Entry);
1734 TargetLowering::CallLoweringInfo CLI(DAG.getEntryNode(), PtrTy,
1735 false, false, false, false, 0, CallingConv::C,
1736 /*isTailCall=*/false, /*doesNotRet=*/false,
1737 /*isReturnValueUsed=*/true,
1738 TlsGetAddr, Args, DAG, dl);
1739 std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI);
1741 SDValue Ret = CallResult.first;
1743 if (model != TLSModel::LocalDynamic)
1746 SDValue TGAHi = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1747 MipsII::MO_DTPREL_HI);
1748 SDValue Hi = DAG.getNode(MipsISD::Hi, dl, PtrVT, TGAHi);
1749 SDValue TGALo = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1750 MipsII::MO_DTPREL_LO);
1751 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, PtrVT, TGALo);
1752 SDValue Add = DAG.getNode(ISD::ADD, dl, PtrVT, Hi, Ret);
1753 return DAG.getNode(ISD::ADD, dl, PtrVT, Add, Lo);
1757 if (model == TLSModel::InitialExec) {
1758 // Initial Exec TLS Model
1759 SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1760 MipsII::MO_GOTTPREL);
1761 TGA = DAG.getNode(MipsISD::Wrapper, dl, PtrVT, GetGlobalReg(DAG, PtrVT),
1763 Offset = DAG.getLoad(PtrVT, dl,
1764 DAG.getEntryNode(), TGA, MachinePointerInfo(),
1765 false, false, false, 0);
1767 // Local Exec TLS Model
1768 assert(model == TLSModel::LocalExec);
1769 SDValue TGAHi = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1770 MipsII::MO_TPREL_HI);
1771 SDValue TGALo = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
1772 MipsII::MO_TPREL_LO);
1773 SDValue Hi = DAG.getNode(MipsISD::Hi, dl, PtrVT, TGAHi);
1774 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, PtrVT, TGALo);
1775 Offset = DAG.getNode(ISD::ADD, dl, PtrVT, Hi, Lo);
1778 SDValue ThreadPointer = DAG.getNode(MipsISD::ThreadPointer, dl, PtrVT);
1779 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
1782 SDValue MipsTargetLowering::
1783 LowerJumpTable(SDValue Op, SelectionDAG &DAG) const
1785 SDValue HiPart, JTI, JTILo;
1786 // FIXME there isn't actually debug info here
1787 DebugLoc dl = Op.getDebugLoc();
1788 bool IsPIC = getTargetMachine().getRelocationModel() == Reloc::PIC_;
1789 EVT PtrVT = Op.getValueType();
1790 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
1792 if (!IsPIC && !IsN64) {
1793 JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MipsII::MO_ABS_HI);
1794 HiPart = DAG.getNode(MipsISD::Hi, dl, PtrVT, JTI);
1795 JTILo = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MipsII::MO_ABS_LO);
1796 } else {// Emit Load from Global Pointer
1797 unsigned GOTFlag = HasMips64 ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT;
1798 unsigned OfstFlag = HasMips64 ? MipsII::MO_GOT_OFST : MipsII::MO_ABS_LO;
1799 JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, GOTFlag);
1800 JTI = DAG.getNode(MipsISD::Wrapper, dl, PtrVT, GetGlobalReg(DAG, PtrVT),
1802 HiPart = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), JTI,
1803 MachinePointerInfo(), false, false, false, 0);
1804 JTILo = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, OfstFlag);
1807 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, PtrVT, JTILo);
1808 return DAG.getNode(ISD::ADD, dl, PtrVT, HiPart, Lo);
1811 SDValue MipsTargetLowering::
1812 LowerConstantPool(SDValue Op, SelectionDAG &DAG) const
1815 ConstantPoolSDNode *N = cast<ConstantPoolSDNode>(Op);
1816 const Constant *C = N->getConstVal();
1817 // FIXME there isn't actually debug info here
1818 DebugLoc dl = Op.getDebugLoc();
1820 // gp_rel relocation
1821 // FIXME: we should reference the constant pool using small data sections,
1822 // but the asm printer currently doesn't support this feature without
1823 // hacking it. This feature should come soon so we can uncomment the
1825 //if (IsInSmallSection(C->getType())) {
1826 // SDValue GPRelNode = DAG.getNode(MipsISD::GPRel, MVT::i32, CP);
1827 // SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(MVT::i32);
1828 // ResNode = DAG.getNode(ISD::ADD, MVT::i32, GOT, GPRelNode);
1830 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ && !IsN64) {
1831 SDValue CPHi = DAG.getTargetConstantPool(C, MVT::i32, N->getAlignment(),
1832 N->getOffset(), MipsII::MO_ABS_HI);
1833 SDValue CPLo = DAG.getTargetConstantPool(C, MVT::i32, N->getAlignment(),
1834 N->getOffset(), MipsII::MO_ABS_LO);
1835 SDValue HiPart = DAG.getNode(MipsISD::Hi, dl, MVT::i32, CPHi);
1836 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, MVT::i32, CPLo);
1837 ResNode = DAG.getNode(ISD::ADD, dl, MVT::i32, HiPart, Lo);
1839 EVT ValTy = Op.getValueType();
1840 unsigned GOTFlag = HasMips64 ? MipsII::MO_GOT_PAGE : MipsII::MO_GOT;
1841 unsigned OFSTFlag = HasMips64 ? MipsII::MO_GOT_OFST : MipsII::MO_ABS_LO;
1842 SDValue CP = DAG.getTargetConstantPool(C, ValTy, N->getAlignment(),
1843 N->getOffset(), GOTFlag);
1844 CP = DAG.getNode(MipsISD::Wrapper, dl, ValTy, GetGlobalReg(DAG, ValTy), CP);
1845 SDValue Load = DAG.getLoad(ValTy, dl, DAG.getEntryNode(), CP,
1846 MachinePointerInfo::getConstantPool(), false,
1848 SDValue CPLo = DAG.getTargetConstantPool(C, ValTy, N->getAlignment(),
1849 N->getOffset(), OFSTFlag);
1850 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, ValTy, CPLo);
1851 ResNode = DAG.getNode(ISD::ADD, dl, ValTy, Load, Lo);
1857 SDValue MipsTargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const {
1858 MachineFunction &MF = DAG.getMachineFunction();
1859 MipsFunctionInfo *FuncInfo = MF.getInfo<MipsFunctionInfo>();
1861 DebugLoc dl = Op.getDebugLoc();
1862 SDValue FI = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
1865 // vastart just stores the address of the VarArgsFrameIndex slot into the
1866 // memory location argument.
1867 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
1868 return DAG.getStore(Op.getOperand(0), dl, FI, Op.getOperand(1),
1869 MachinePointerInfo(SV), false, false, 0);
1872 static SDValue LowerFCOPYSIGN32(SDValue Op, SelectionDAG &DAG, bool HasR2) {
1873 EVT TyX = Op.getOperand(0).getValueType();
1874 EVT TyY = Op.getOperand(1).getValueType();
1875 SDValue Const1 = DAG.getConstant(1, MVT::i32);
1876 SDValue Const31 = DAG.getConstant(31, MVT::i32);
1877 DebugLoc DL = Op.getDebugLoc();
1880 // If operand is of type f64, extract the upper 32-bit. Otherwise, bitcast it
1882 SDValue X = (TyX == MVT::f32) ?
1883 DAG.getNode(ISD::BITCAST, DL, MVT::i32, Op.getOperand(0)) :
1884 DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32, Op.getOperand(0),
1886 SDValue Y = (TyY == MVT::f32) ?
1887 DAG.getNode(ISD::BITCAST, DL, MVT::i32, Op.getOperand(1)) :
1888 DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32, Op.getOperand(1),
1892 // ext E, Y, 31, 1 ; extract bit31 of Y
1893 // ins X, E, 31, 1 ; insert extracted bit at bit31 of X
1894 SDValue E = DAG.getNode(MipsISD::Ext, DL, MVT::i32, Y, Const31, Const1);
1895 Res = DAG.getNode(MipsISD::Ins, DL, MVT::i32, E, Const31, Const1, X);
1898 // srl SrlX, SllX, 1
1900 // sll SllY, SrlX, 31
1901 // or Or, SrlX, SllY
1902 SDValue SllX = DAG.getNode(ISD::SHL, DL, MVT::i32, X, Const1);
1903 SDValue SrlX = DAG.getNode(ISD::SRL, DL, MVT::i32, SllX, Const1);
1904 SDValue SrlY = DAG.getNode(ISD::SRL, DL, MVT::i32, Y, Const31);
1905 SDValue SllY = DAG.getNode(ISD::SHL, DL, MVT::i32, SrlY, Const31);
1906 Res = DAG.getNode(ISD::OR, DL, MVT::i32, SrlX, SllY);
1909 if (TyX == MVT::f32)
1910 return DAG.getNode(ISD::BITCAST, DL, Op.getOperand(0).getValueType(), Res);
1912 SDValue LowX = DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32,
1913 Op.getOperand(0), DAG.getConstant(0, MVT::i32));
1914 return DAG.getNode(MipsISD::BuildPairF64, DL, MVT::f64, LowX, Res);
1917 static SDValue LowerFCOPYSIGN64(SDValue Op, SelectionDAG &DAG, bool HasR2) {
1918 unsigned WidthX = Op.getOperand(0).getValueSizeInBits();
1919 unsigned WidthY = Op.getOperand(1).getValueSizeInBits();
1920 EVT TyX = MVT::getIntegerVT(WidthX), TyY = MVT::getIntegerVT(WidthY);
1921 SDValue Const1 = DAG.getConstant(1, MVT::i32);
1922 DebugLoc DL = Op.getDebugLoc();
1924 // Bitcast to integer nodes.
1925 SDValue X = DAG.getNode(ISD::BITCAST, DL, TyX, Op.getOperand(0));
1926 SDValue Y = DAG.getNode(ISD::BITCAST, DL, TyY, Op.getOperand(1));
1929 // ext E, Y, width(Y) - 1, 1 ; extract bit width(Y)-1 of Y
1930 // ins X, E, width(X) - 1, 1 ; insert extracted bit at bit width(X)-1 of X
1931 SDValue E = DAG.getNode(MipsISD::Ext, DL, TyY, Y,
1932 DAG.getConstant(WidthY - 1, MVT::i32), Const1);
1934 if (WidthX > WidthY)
1935 E = DAG.getNode(ISD::ZERO_EXTEND, DL, TyX, E);
1936 else if (WidthY > WidthX)
1937 E = DAG.getNode(ISD::TRUNCATE, DL, TyX, E);
1939 SDValue I = DAG.getNode(MipsISD::Ins, DL, TyX, E,
1940 DAG.getConstant(WidthX - 1, MVT::i32), Const1, X);
1941 return DAG.getNode(ISD::BITCAST, DL, Op.getOperand(0).getValueType(), I);
1944 // (d)sll SllX, X, 1
1945 // (d)srl SrlX, SllX, 1
1946 // (d)srl SrlY, Y, width(Y)-1
1947 // (d)sll SllY, SrlX, width(Y)-1
1948 // or Or, SrlX, SllY
1949 SDValue SllX = DAG.getNode(ISD::SHL, DL, TyX, X, Const1);
1950 SDValue SrlX = DAG.getNode(ISD::SRL, DL, TyX, SllX, Const1);
1951 SDValue SrlY = DAG.getNode(ISD::SRL, DL, TyY, Y,
1952 DAG.getConstant(WidthY - 1, MVT::i32));
1954 if (WidthX > WidthY)
1955 SrlY = DAG.getNode(ISD::ZERO_EXTEND, DL, TyX, SrlY);
1956 else if (WidthY > WidthX)
1957 SrlY = DAG.getNode(ISD::TRUNCATE, DL, TyX, SrlY);
1959 SDValue SllY = DAG.getNode(ISD::SHL, DL, TyX, SrlY,
1960 DAG.getConstant(WidthX - 1, MVT::i32));
1961 SDValue Or = DAG.getNode(ISD::OR, DL, TyX, SrlX, SllY);
1962 return DAG.getNode(ISD::BITCAST, DL, Op.getOperand(0).getValueType(), Or);
1966 MipsTargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
1967 if (Subtarget->hasMips64())
1968 return LowerFCOPYSIGN64(Op, DAG, Subtarget->hasMips32r2());
1970 return LowerFCOPYSIGN32(Op, DAG, Subtarget->hasMips32r2());
1973 static SDValue LowerFABS32(SDValue Op, SelectionDAG &DAG, bool HasR2) {
1974 SDValue Res, Const1 = DAG.getConstant(1, MVT::i32);
1975 DebugLoc DL = Op.getDebugLoc();
1977 // If operand is of type f64, extract the upper 32-bit. Otherwise, bitcast it
1979 SDValue X = (Op.getValueType() == MVT::f32) ?
1980 DAG.getNode(ISD::BITCAST, DL, MVT::i32, Op.getOperand(0)) :
1981 DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32, Op.getOperand(0),
1986 Res = DAG.getNode(MipsISD::Ins, DL, MVT::i32,
1987 DAG.getRegister(Mips::ZERO, MVT::i32),
1988 DAG.getConstant(31, MVT::i32), Const1, X);
1990 SDValue SllX = DAG.getNode(ISD::SHL, DL, MVT::i32, X, Const1);
1991 Res = DAG.getNode(ISD::SRL, DL, MVT::i32, SllX, Const1);
1994 if (Op.getValueType() == MVT::f32)
1995 return DAG.getNode(ISD::BITCAST, DL, MVT::f32, Res);
1997 SDValue LowX = DAG.getNode(MipsISD::ExtractElementF64, DL, MVT::i32,
1998 Op.getOperand(0), DAG.getConstant(0, MVT::i32));
1999 return DAG.getNode(MipsISD::BuildPairF64, DL, MVT::f64, LowX, Res);
2002 static SDValue LowerFABS64(SDValue Op, SelectionDAG &DAG, bool HasR2) {
2003 SDValue Res, Const1 = DAG.getConstant(1, MVT::i32);
2004 DebugLoc DL = Op.getDebugLoc();
2006 // Bitcast to integer node.
2007 SDValue X = DAG.getNode(ISD::BITCAST, DL, MVT::i64, Op.getOperand(0));
2011 Res = DAG.getNode(MipsISD::Ins, DL, MVT::i64,
2012 DAG.getRegister(Mips::ZERO_64, MVT::i64),
2013 DAG.getConstant(63, MVT::i32), Const1, X);
2015 SDValue SllX = DAG.getNode(ISD::SHL, DL, MVT::i64, X, Const1);
2016 Res = DAG.getNode(ISD::SRL, DL, MVT::i64, SllX, Const1);
2019 return DAG.getNode(ISD::BITCAST, DL, MVT::f64, Res);
2023 MipsTargetLowering::LowerFABS(SDValue Op, SelectionDAG &DAG) const {
2024 if (Subtarget->hasMips64() && (Op.getValueType() == MVT::f64))
2025 return LowerFABS64(Op, DAG, Subtarget->hasMips32r2());
2027 return LowerFABS32(Op, DAG, Subtarget->hasMips32r2());
2030 SDValue MipsTargetLowering::
2031 LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
2033 assert((cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue() == 0) &&
2034 "Frame address can only be determined for current frame.");
2036 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
2037 MFI->setFrameAddressIsTaken(true);
2038 EVT VT = Op.getValueType();
2039 DebugLoc dl = Op.getDebugLoc();
2040 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl,
2041 IsN64 ? Mips::FP_64 : Mips::FP, VT);
2045 SDValue MipsTargetLowering::LowerRETURNADDR(SDValue Op,
2046 SelectionDAG &DAG) const {
2048 assert((cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue() == 0) &&
2049 "Return address can be determined only for current frame.");
2051 MachineFunction &MF = DAG.getMachineFunction();
2052 MachineFrameInfo *MFI = MF.getFrameInfo();
2053 EVT VT = Op.getValueType();
2054 unsigned RA = IsN64 ? Mips::RA_64 : Mips::RA;
2055 MFI->setReturnAddressIsTaken(true);
2057 // Return RA, which contains the return address. Mark it an implicit live-in.
2058 unsigned Reg = MF.addLiveIn(RA, getRegClassFor(VT));
2059 return DAG.getCopyFromReg(DAG.getEntryNode(), Op.getDebugLoc(), Reg, VT);
2062 // TODO: set SType according to the desired memory barrier behavior.
2064 MipsTargetLowering::LowerMEMBARRIER(SDValue Op, SelectionDAG &DAG) const {
2066 DebugLoc dl = Op.getDebugLoc();
2067 return DAG.getNode(MipsISD::Sync, dl, MVT::Other, Op.getOperand(0),
2068 DAG.getConstant(SType, MVT::i32));
2071 SDValue MipsTargetLowering::LowerATOMIC_FENCE(SDValue Op,
2072 SelectionDAG &DAG) const {
2073 // FIXME: Need pseudo-fence for 'singlethread' fences
2074 // FIXME: Set SType for weaker fences where supported/appropriate.
2076 DebugLoc dl = Op.getDebugLoc();
2077 return DAG.getNode(MipsISD::Sync, dl, MVT::Other, Op.getOperand(0),
2078 DAG.getConstant(SType, MVT::i32));
2081 SDValue MipsTargetLowering::LowerShiftLeftParts(SDValue Op,
2082 SelectionDAG &DAG) const {
2083 DebugLoc DL = Op.getDebugLoc();
2084 SDValue Lo = Op.getOperand(0), Hi = Op.getOperand(1);
2085 SDValue Shamt = Op.getOperand(2);
2088 // lo = (shl lo, shamt)
2089 // hi = (or (shl hi, shamt) (srl (srl lo, 1), ~shamt))
2092 // hi = (shl lo, shamt[4:0])
2093 SDValue Not = DAG.getNode(ISD::XOR, DL, MVT::i32, Shamt,
2094 DAG.getConstant(-1, MVT::i32));
2095 SDValue ShiftRight1Lo = DAG.getNode(ISD::SRL, DL, MVT::i32, Lo,
2096 DAG.getConstant(1, MVT::i32));
2097 SDValue ShiftRightLo = DAG.getNode(ISD::SRL, DL, MVT::i32, ShiftRight1Lo,
2099 SDValue ShiftLeftHi = DAG.getNode(ISD::SHL, DL, MVT::i32, Hi, Shamt);
2100 SDValue Or = DAG.getNode(ISD::OR, DL, MVT::i32, ShiftLeftHi, ShiftRightLo);
2101 SDValue ShiftLeftLo = DAG.getNode(ISD::SHL, DL, MVT::i32, Lo, Shamt);
2102 SDValue Cond = DAG.getNode(ISD::AND, DL, MVT::i32, Shamt,
2103 DAG.getConstant(0x20, MVT::i32));
2104 Lo = DAG.getNode(ISD::SELECT, DL, MVT::i32, Cond,
2105 DAG.getConstant(0, MVT::i32), ShiftLeftLo);
2106 Hi = DAG.getNode(ISD::SELECT, DL, MVT::i32, Cond, ShiftLeftLo, Or);
2108 SDValue Ops[2] = {Lo, Hi};
2109 return DAG.getMergeValues(Ops, 2, DL);
2112 SDValue MipsTargetLowering::LowerShiftRightParts(SDValue Op, SelectionDAG &DAG,
2114 DebugLoc DL = Op.getDebugLoc();
2115 SDValue Lo = Op.getOperand(0), Hi = Op.getOperand(1);
2116 SDValue Shamt = Op.getOperand(2);
2119 // lo = (or (shl (shl hi, 1), ~shamt) (srl lo, shamt))
2121 // hi = (sra hi, shamt)
2123 // hi = (srl hi, shamt)
2126 // lo = (sra hi, shamt[4:0])
2127 // hi = (sra hi, 31)
2129 // lo = (srl hi, shamt[4:0])
2131 SDValue Not = DAG.getNode(ISD::XOR, DL, MVT::i32, Shamt,
2132 DAG.getConstant(-1, MVT::i32));
2133 SDValue ShiftLeft1Hi = DAG.getNode(ISD::SHL, DL, MVT::i32, Hi,
2134 DAG.getConstant(1, MVT::i32));
2135 SDValue ShiftLeftHi = DAG.getNode(ISD::SHL, DL, MVT::i32, ShiftLeft1Hi, Not);
2136 SDValue ShiftRightLo = DAG.getNode(ISD::SRL, DL, MVT::i32, Lo, Shamt);
2137 SDValue Or = DAG.getNode(ISD::OR, DL, MVT::i32, ShiftLeftHi, ShiftRightLo);
2138 SDValue ShiftRightHi = DAG.getNode(IsSRA ? ISD::SRA : ISD::SRL, DL, MVT::i32,
2140 SDValue Cond = DAG.getNode(ISD::AND, DL, MVT::i32, Shamt,
2141 DAG.getConstant(0x20, MVT::i32));
2142 SDValue Shift31 = DAG.getNode(ISD::SRA, DL, MVT::i32, Hi,
2143 DAG.getConstant(31, MVT::i32));
2144 Lo = DAG.getNode(ISD::SELECT, DL, MVT::i32, Cond, ShiftRightHi, Or);
2145 Hi = DAG.getNode(ISD::SELECT, DL, MVT::i32, Cond,
2146 IsSRA ? Shift31 : DAG.getConstant(0, MVT::i32),
2149 SDValue Ops[2] = {Lo, Hi};
2150 return DAG.getMergeValues(Ops, 2, DL);
2153 static SDValue CreateLoadLR(unsigned Opc, SelectionDAG &DAG, LoadSDNode *LD,
2154 SDValue Chain, SDValue Src, unsigned Offset) {
2155 SDValue Ptr = LD->getBasePtr();
2156 EVT VT = LD->getValueType(0), MemVT = LD->getMemoryVT();
2157 EVT BasePtrVT = Ptr.getValueType();
2158 DebugLoc DL = LD->getDebugLoc();
2159 SDVTList VTList = DAG.getVTList(VT, MVT::Other);
2162 Ptr = DAG.getNode(ISD::ADD, DL, BasePtrVT, Ptr,
2163 DAG.getConstant(Offset, BasePtrVT));
2165 SDValue Ops[] = { Chain, Ptr, Src };
2166 return DAG.getMemIntrinsicNode(Opc, DL, VTList, Ops, 3, MemVT,
2167 LD->getMemOperand());
2170 // Expand an unaligned 32 or 64-bit integer load node.
2171 SDValue MipsTargetLowering::LowerLOAD(SDValue Op, SelectionDAG &DAG) const {
2172 LoadSDNode *LD = cast<LoadSDNode>(Op);
2173 EVT MemVT = LD->getMemoryVT();
2175 // Return if load is aligned or if MemVT is neither i32 nor i64.
2176 if ((LD->getAlignment() >= MemVT.getSizeInBits() / 8) ||
2177 ((MemVT != MVT::i32) && (MemVT != MVT::i64)))
2180 bool IsLittle = Subtarget->isLittle();
2181 EVT VT = Op.getValueType();
2182 ISD::LoadExtType ExtType = LD->getExtensionType();
2183 SDValue Chain = LD->getChain(), Undef = DAG.getUNDEF(VT);
2185 assert((VT == MVT::i32) || (VT == MVT::i64));
2188 // (set dst, (i64 (load baseptr)))
2190 // (set tmp, (ldl (add baseptr, 7), undef))
2191 // (set dst, (ldr baseptr, tmp))
2192 if ((VT == MVT::i64) && (ExtType == ISD::NON_EXTLOAD)) {
2193 SDValue LDL = CreateLoadLR(MipsISD::LDL, DAG, LD, Chain, Undef,
2195 return CreateLoadLR(MipsISD::LDR, DAG, LD, LDL.getValue(1), LDL,
2199 SDValue LWL = CreateLoadLR(MipsISD::LWL, DAG, LD, Chain, Undef,
2201 SDValue LWR = CreateLoadLR(MipsISD::LWR, DAG, LD, LWL.getValue(1), LWL,
2205 // (set dst, (i32 (load baseptr))) or
2206 // (set dst, (i64 (sextload baseptr))) or
2207 // (set dst, (i64 (extload baseptr)))
2209 // (set tmp, (lwl (add baseptr, 3), undef))
2210 // (set dst, (lwr baseptr, tmp))
2211 if ((VT == MVT::i32) || (ExtType == ISD::SEXTLOAD) ||
2212 (ExtType == ISD::EXTLOAD))
2215 assert((VT == MVT::i64) && (ExtType == ISD::ZEXTLOAD));
2218 // (set dst, (i64 (zextload baseptr)))
2220 // (set tmp0, (lwl (add baseptr, 3), undef))
2221 // (set tmp1, (lwr baseptr, tmp0))
2222 // (set tmp2, (shl tmp1, 32))
2223 // (set dst, (srl tmp2, 32))
2224 DebugLoc DL = LD->getDebugLoc();
2225 SDValue Const32 = DAG.getConstant(32, MVT::i32);
2226 SDValue SLL = DAG.getNode(ISD::SHL, DL, MVT::i64, LWR, Const32);
2227 SDValue SRL = DAG.getNode(ISD::SRL, DL, MVT::i64, SLL, Const32);
2228 SDValue Ops[] = { SRL, LWR.getValue(1) };
2229 return DAG.getMergeValues(Ops, 2, DL);
2232 static SDValue CreateStoreLR(unsigned Opc, SelectionDAG &DAG, StoreSDNode *SD,
2233 SDValue Chain, unsigned Offset) {
2234 SDValue Ptr = SD->getBasePtr(), Value = SD->getValue();
2235 EVT MemVT = SD->getMemoryVT(), BasePtrVT = Ptr.getValueType();
2236 DebugLoc DL = SD->getDebugLoc();
2237 SDVTList VTList = DAG.getVTList(MVT::Other);
2240 Ptr = DAG.getNode(ISD::ADD, DL, BasePtrVT, Ptr,
2241 DAG.getConstant(Offset, BasePtrVT));
2243 SDValue Ops[] = { Chain, Value, Ptr };
2244 return DAG.getMemIntrinsicNode(Opc, DL, VTList, Ops, 3, MemVT,
2245 SD->getMemOperand());
2248 // Expand an unaligned 32 or 64-bit integer store node.
2249 SDValue MipsTargetLowering::LowerSTORE(SDValue Op, SelectionDAG &DAG) const {
2250 StoreSDNode *SD = cast<StoreSDNode>(Op);
2251 EVT MemVT = SD->getMemoryVT();
2253 // Return if store is aligned or if MemVT is neither i32 nor i64.
2254 if ((SD->getAlignment() >= MemVT.getSizeInBits() / 8) ||
2255 ((MemVT != MVT::i32) && (MemVT != MVT::i64)))
2258 bool IsLittle = Subtarget->isLittle();
2259 SDValue Value = SD->getValue(), Chain = SD->getChain();
2260 EVT VT = Value.getValueType();
2263 // (store val, baseptr) or
2264 // (truncstore val, baseptr)
2266 // (swl val, (add baseptr, 3))
2267 // (swr val, baseptr)
2268 if ((VT == MVT::i32) || SD->isTruncatingStore()) {
2269 SDValue SWL = CreateStoreLR(MipsISD::SWL, DAG, SD, Chain,
2271 return CreateStoreLR(MipsISD::SWR, DAG, SD, SWL, IsLittle ? 0 : 3);
2274 assert(VT == MVT::i64);
2277 // (store val, baseptr)
2279 // (sdl val, (add baseptr, 7))
2280 // (sdr val, baseptr)
2281 SDValue SDL = CreateStoreLR(MipsISD::SDL, DAG, SD, Chain, IsLittle ? 7 : 0);
2282 return CreateStoreLR(MipsISD::SDR, DAG, SD, SDL, IsLittle ? 0 : 7);
2285 //===----------------------------------------------------------------------===//
2286 // Calling Convention Implementation
2287 //===----------------------------------------------------------------------===//
2289 //===----------------------------------------------------------------------===//
2290 // TODO: Implement a generic logic using tblgen that can support this.
2291 // Mips O32 ABI rules:
2293 // i32 - Passed in A0, A1, A2, A3 and stack
2294 // f32 - Only passed in f32 registers if no int reg has been used yet to hold
2295 // an argument. Otherwise, passed in A1, A2, A3 and stack.
2296 // f64 - Only passed in two aliased f32 registers if no int reg has been used
2297 // yet to hold an argument. Otherwise, use A2, A3 and stack. If A1 is
2298 // not used, it must be shadowed. If only A3 is avaiable, shadow it and
2301 // For vararg functions, all arguments are passed in A0, A1, A2, A3 and stack.
2302 //===----------------------------------------------------------------------===//
2304 static bool CC_MipsO32(unsigned ValNo, MVT ValVT,
2305 MVT LocVT, CCValAssign::LocInfo LocInfo,
2306 ISD::ArgFlagsTy ArgFlags, CCState &State) {
2308 static const unsigned IntRegsSize=4, FloatRegsSize=2;
2310 static const uint16_t IntRegs[] = {
2311 Mips::A0, Mips::A1, Mips::A2, Mips::A3
2313 static const uint16_t F32Regs[] = {
2314 Mips::F12, Mips::F14
2316 static const uint16_t F64Regs[] = {
2321 if (ArgFlags.isByVal()) {
2322 State.HandleByVal(ValNo, ValVT, LocVT, LocInfo,
2323 1 /*MinSize*/, 4 /*MinAlign*/, ArgFlags);
2324 unsigned NextReg = (State.getNextStackOffset() + 3) / 4;
2325 for (unsigned r = State.getFirstUnallocated(IntRegs, IntRegsSize);
2326 r < std::min(IntRegsSize, NextReg); ++r)
2327 State.AllocateReg(IntRegs[r]);
2331 // Promote i8 and i16
2332 if (LocVT == MVT::i8 || LocVT == MVT::i16) {
2334 if (ArgFlags.isSExt())
2335 LocInfo = CCValAssign::SExt;
2336 else if (ArgFlags.isZExt())
2337 LocInfo = CCValAssign::ZExt;
2339 LocInfo = CCValAssign::AExt;
2344 // f32 and f64 are allocated in A0, A1, A2, A3 when either of the following
2345 // is true: function is vararg, argument is 3rd or higher, there is previous
2346 // argument which is not f32 or f64.
2347 bool AllocateFloatsInIntReg = State.isVarArg() || ValNo > 1
2348 || State.getFirstUnallocated(F32Regs, FloatRegsSize) != ValNo;
2349 unsigned OrigAlign = ArgFlags.getOrigAlign();
2350 bool isI64 = (ValVT == MVT::i32 && OrigAlign == 8);
2352 if (ValVT == MVT::i32 || (ValVT == MVT::f32 && AllocateFloatsInIntReg)) {
2353 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2354 // If this is the first part of an i64 arg,
2355 // the allocated register must be either A0 or A2.
2356 if (isI64 && (Reg == Mips::A1 || Reg == Mips::A3))
2357 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2359 } else if (ValVT == MVT::f64 && AllocateFloatsInIntReg) {
2360 // Allocate int register and shadow next int register. If first
2361 // available register is Mips::A1 or Mips::A3, shadow it too.
2362 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2363 if (Reg == Mips::A1 || Reg == Mips::A3)
2364 Reg = State.AllocateReg(IntRegs, IntRegsSize);
2365 State.AllocateReg(IntRegs, IntRegsSize);
2367 } else if (ValVT.isFloatingPoint() && !AllocateFloatsInIntReg) {
2368 // we are guaranteed to find an available float register
2369 if (ValVT == MVT::f32) {
2370 Reg = State.AllocateReg(F32Regs, FloatRegsSize);
2371 // Shadow int register
2372 State.AllocateReg(IntRegs, IntRegsSize);
2374 Reg = State.AllocateReg(F64Regs, FloatRegsSize);
2375 // Shadow int registers
2376 unsigned Reg2 = State.AllocateReg(IntRegs, IntRegsSize);
2377 if (Reg2 == Mips::A1 || Reg2 == Mips::A3)
2378 State.AllocateReg(IntRegs, IntRegsSize);
2379 State.AllocateReg(IntRegs, IntRegsSize);
2382 llvm_unreachable("Cannot handle this ValVT.");
2384 unsigned SizeInBytes = ValVT.getSizeInBits() >> 3;
2385 unsigned Offset = State.AllocateStack(SizeInBytes, OrigAlign);
2388 State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
2390 State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, LocVT, LocInfo));
2392 return false; // CC must always match
2395 static const uint16_t Mips64IntRegs[8] =
2396 {Mips::A0_64, Mips::A1_64, Mips::A2_64, Mips::A3_64,
2397 Mips::T0_64, Mips::T1_64, Mips::T2_64, Mips::T3_64};
2398 static const uint16_t Mips64DPRegs[8] =
2399 {Mips::D12_64, Mips::D13_64, Mips::D14_64, Mips::D15_64,
2400 Mips::D16_64, Mips::D17_64, Mips::D18_64, Mips::D19_64};
2402 static bool CC_Mips64Byval(unsigned ValNo, MVT ValVT, MVT LocVT,
2403 CCValAssign::LocInfo LocInfo,
2404 ISD::ArgFlagsTy ArgFlags, CCState &State) {
2405 unsigned Align = std::max(ArgFlags.getByValAlign(), (unsigned)8);
2406 unsigned Size = (ArgFlags.getByValSize() + 7) / 8 * 8;
2407 unsigned FirstIdx = State.getFirstUnallocated(Mips64IntRegs, 8);
2409 assert(Align <= 16 && "Cannot handle alignments larger than 16.");
2411 // If byval is 16-byte aligned, the first arg register must be even.
2412 if ((Align == 16) && (FirstIdx % 2)) {
2413 State.AllocateReg(Mips64IntRegs[FirstIdx], Mips64DPRegs[FirstIdx]);
2417 // Mark the registers allocated.
2418 for (unsigned I = FirstIdx; Size && (I < 8); Size -= 8, ++I)
2419 State.AllocateReg(Mips64IntRegs[I], Mips64DPRegs[I]);
2421 // Allocate space on caller's stack.
2422 unsigned Offset = State.AllocateStack(Size, Align);
2425 State.addLoc(CCValAssign::getReg(ValNo, ValVT, Mips64IntRegs[FirstIdx],
2428 State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
2433 #include "MipsGenCallingConv.inc"
2436 AnalyzeMips64CallOperands(CCState &CCInfo,
2437 const SmallVectorImpl<ISD::OutputArg> &Outs) {
2438 unsigned NumOps = Outs.size();
2439 for (unsigned i = 0; i != NumOps; ++i) {
2440 MVT ArgVT = Outs[i].VT;
2441 ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
2444 if (Outs[i].IsFixed)
2445 R = CC_MipsN(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, CCInfo);
2447 R = CC_MipsN_VarArg(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, CCInfo);
2451 dbgs() << "Call operand #" << i << " has unhandled type "
2452 << EVT(ArgVT).getEVTString();
2454 llvm_unreachable(0);
2459 //===----------------------------------------------------------------------===//
2460 // Call Calling Convention Implementation
2461 //===----------------------------------------------------------------------===//
2463 static const unsigned O32IntRegsSize = 4;
2465 static const uint16_t O32IntRegs[] = {
2466 Mips::A0, Mips::A1, Mips::A2, Mips::A3
2469 // Return next O32 integer argument register.
2470 static unsigned getNextIntArgReg(unsigned Reg) {
2471 assert((Reg == Mips::A0) || (Reg == Mips::A2));
2472 return (Reg == Mips::A0) ? Mips::A1 : Mips::A3;
2475 // Write ByVal Arg to arg registers and stack.
2477 WriteByValArg(SDValue Chain, DebugLoc dl,
2478 SmallVector<std::pair<unsigned, SDValue>, 16> &RegsToPass,
2479 SmallVector<SDValue, 8> &MemOpChains, SDValue StackPtr,
2480 MachineFrameInfo *MFI, SelectionDAG &DAG, SDValue Arg,
2481 const CCValAssign &VA, const ISD::ArgFlagsTy &Flags,
2482 MVT PtrType, bool isLittle) {
2483 unsigned LocMemOffset = VA.getLocMemOffset();
2484 unsigned Offset = 0;
2485 uint32_t RemainingSize = Flags.getByValSize();
2486 unsigned ByValAlign = Flags.getByValAlign();
2488 // Copy the first 4 words of byval arg to registers A0 - A3.
2489 // FIXME: Use a stricter alignment if it enables better optimization in passes
2491 for (; RemainingSize >= 4 && LocMemOffset < 4 * 4;
2492 Offset += 4, RemainingSize -= 4, LocMemOffset += 4) {
2493 SDValue LoadPtr = DAG.getNode(ISD::ADD, dl, MVT::i32, Arg,
2494 DAG.getConstant(Offset, MVT::i32));
2495 SDValue LoadVal = DAG.getLoad(MVT::i32, dl, Chain, LoadPtr,
2496 MachinePointerInfo(), false, false, false,
2497 std::min(ByValAlign, (unsigned )4));
2498 MemOpChains.push_back(LoadVal.getValue(1));
2499 unsigned DstReg = O32IntRegs[LocMemOffset / 4];
2500 RegsToPass.push_back(std::make_pair(DstReg, LoadVal));
2503 if (RemainingSize == 0)
2506 // If there still is a register available for argument passing, write the
2507 // remaining part of the structure to it using subword loads and shifts.
2508 if (LocMemOffset < 4 * 4) {
2509 assert(RemainingSize <= 3 && RemainingSize >= 1 &&
2510 "There must be one to three bytes remaining.");
2511 unsigned LoadSize = (RemainingSize == 3 ? 2 : RemainingSize);
2512 SDValue LoadPtr = DAG.getNode(ISD::ADD, dl, MVT::i32, Arg,
2513 DAG.getConstant(Offset, MVT::i32));
2514 unsigned Alignment = std::min(ByValAlign, (unsigned )4);
2515 SDValue LoadVal = DAG.getExtLoad(ISD::ZEXTLOAD, dl, MVT::i32, Chain,
2516 LoadPtr, MachinePointerInfo(),
2517 MVT::getIntegerVT(LoadSize * 8), false,
2519 MemOpChains.push_back(LoadVal.getValue(1));
2521 // If target is big endian, shift it to the most significant half-word or
2524 LoadVal = DAG.getNode(ISD::SHL, dl, MVT::i32, LoadVal,
2525 DAG.getConstant(32 - LoadSize * 8, MVT::i32));
2528 RemainingSize -= LoadSize;
2530 // Read second subword if necessary.
2531 if (RemainingSize != 0) {
2532 assert(RemainingSize == 1 && "There must be one byte remaining.");
2533 LoadPtr = DAG.getNode(ISD::ADD, dl, MVT::i32, Arg,
2534 DAG.getConstant(Offset, MVT::i32));
2535 unsigned Alignment = std::min(ByValAlign, (unsigned )2);
2536 SDValue Subword = DAG.getExtLoad(ISD::ZEXTLOAD, dl, MVT::i32, Chain,
2537 LoadPtr, MachinePointerInfo(),
2538 MVT::i8, false, false, Alignment);
2539 MemOpChains.push_back(Subword.getValue(1));
2540 // Insert the loaded byte to LoadVal.
2541 // FIXME: Use INS if supported by target.
2542 unsigned ShiftAmt = isLittle ? 16 : 8;
2543 SDValue Shift = DAG.getNode(ISD::SHL, dl, MVT::i32, Subword,
2544 DAG.getConstant(ShiftAmt, MVT::i32));
2545 LoadVal = DAG.getNode(ISD::OR, dl, MVT::i32, LoadVal, Shift);
2548 unsigned DstReg = O32IntRegs[LocMemOffset / 4];
2549 RegsToPass.push_back(std::make_pair(DstReg, LoadVal));
2553 // Copy remaining part of byval arg using memcpy.
2554 SDValue Src = DAG.getNode(ISD::ADD, dl, MVT::i32, Arg,
2555 DAG.getConstant(Offset, MVT::i32));
2556 SDValue Dst = DAG.getNode(ISD::ADD, dl, MVT::i32, StackPtr,
2557 DAG.getIntPtrConstant(LocMemOffset));
2558 Chain = DAG.getMemcpy(Chain, dl, Dst, Src,
2559 DAG.getConstant(RemainingSize, MVT::i32),
2560 std::min(ByValAlign, (unsigned)4),
2561 /*isVolatile=*/false, /*AlwaysInline=*/false,
2562 MachinePointerInfo(0), MachinePointerInfo(0));
2563 MemOpChains.push_back(Chain);
2566 // Copy Mips64 byVal arg to registers and stack.
2568 PassByValArg64(SDValue Chain, DebugLoc dl,
2569 SmallVector<std::pair<unsigned, SDValue>, 16> &RegsToPass,
2570 SmallVector<SDValue, 8> &MemOpChains, SDValue StackPtr,
2571 MachineFrameInfo *MFI, SelectionDAG &DAG, SDValue Arg,
2572 const CCValAssign &VA, const ISD::ArgFlagsTy &Flags,
2573 EVT PtrTy, bool isLittle) {
2574 unsigned ByValSize = Flags.getByValSize();
2575 unsigned Alignment = std::min(Flags.getByValAlign(), (unsigned)8);
2576 bool IsRegLoc = VA.isRegLoc();
2577 unsigned Offset = 0; // Offset in # of bytes from the beginning of struct.
2578 unsigned LocMemOffset = 0;
2579 unsigned MemCpySize = ByValSize;
2582 LocMemOffset = VA.getLocMemOffset();
2584 const uint16_t *Reg = std::find(Mips64IntRegs, Mips64IntRegs + 8,
2586 const uint16_t *RegEnd = Mips64IntRegs + 8;
2588 // Copy double words to registers.
2589 for (; (Reg != RegEnd) && (ByValSize >= Offset + 8); ++Reg, Offset += 8) {
2590 SDValue LoadPtr = DAG.getNode(ISD::ADD, dl, PtrTy, Arg,
2591 DAG.getConstant(Offset, PtrTy));
2592 SDValue LoadVal = DAG.getLoad(MVT::i64, dl, Chain, LoadPtr,
2593 MachinePointerInfo(), false, false, false,
2595 MemOpChains.push_back(LoadVal.getValue(1));
2596 RegsToPass.push_back(std::make_pair(*Reg, LoadVal));
2599 // Return if the struct has been fully copied.
2600 if (!(MemCpySize = ByValSize - Offset))
2603 // If there is an argument register available, copy the remainder of the
2604 // byval argument with sub-doubleword loads and shifts.
2605 if (Reg != RegEnd) {
2606 assert((ByValSize < Offset + 8) &&
2607 "Size of the remainder should be smaller than 8-byte.");
2609 for (unsigned LoadSize = 4; Offset < ByValSize; LoadSize /= 2) {
2610 unsigned RemSize = ByValSize - Offset;
2612 if (RemSize < LoadSize)
2615 SDValue LoadPtr = DAG.getNode(ISD::ADD, dl, PtrTy, Arg,
2616 DAG.getConstant(Offset, PtrTy));
2618 DAG.getExtLoad(ISD::ZEXTLOAD, dl, MVT::i64, Chain, LoadPtr,
2619 MachinePointerInfo(), MVT::getIntegerVT(LoadSize * 8),
2620 false, false, Alignment);
2621 MemOpChains.push_back(LoadVal.getValue(1));
2623 // Offset in number of bits from double word boundary.
2624 unsigned OffsetDW = (Offset % 8) * 8;
2625 unsigned Shamt = isLittle ? OffsetDW : 64 - (OffsetDW + LoadSize * 8);
2626 SDValue Shift = DAG.getNode(ISD::SHL, dl, MVT::i64, LoadVal,
2627 DAG.getConstant(Shamt, MVT::i32));
2629 Val = Val.getNode() ? DAG.getNode(ISD::OR, dl, MVT::i64, Val, Shift) :
2632 Alignment = std::min(Alignment, LoadSize);
2635 RegsToPass.push_back(std::make_pair(*Reg, Val));
2640 assert(MemCpySize && "MemCpySize must not be zero.");
2642 // Copy remainder of byval arg to it with memcpy.
2643 SDValue Src = DAG.getNode(ISD::ADD, dl, PtrTy, Arg,
2644 DAG.getConstant(Offset, PtrTy));
2645 SDValue Dst = DAG.getNode(ISD::ADD, dl, MVT::i64, StackPtr,
2646 DAG.getIntPtrConstant(LocMemOffset));
2647 Chain = DAG.getMemcpy(Chain, dl, Dst, Src,
2648 DAG.getConstant(MemCpySize, PtrTy), Alignment,
2649 /*isVolatile=*/false, /*AlwaysInline=*/false,
2650 MachinePointerInfo(0), MachinePointerInfo(0));
2651 MemOpChains.push_back(Chain);
2654 /// LowerCall - functions arguments are copied from virtual regs to
2655 /// (physical regs)/(stack frame), CALLSEQ_START and CALLSEQ_END are emitted.
2656 /// TODO: isTailCall.
2658 MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
2659 SmallVectorImpl<SDValue> &InVals) const {
2660 SelectionDAG &DAG = CLI.DAG;
2661 DebugLoc &dl = CLI.DL;
2662 SmallVector<ISD::OutputArg, 32> &Outs = CLI.Outs;
2663 SmallVector<SDValue, 32> &OutVals = CLI.OutVals;
2664 SmallVector<ISD::InputArg, 32> &Ins = CLI.Ins;
2665 SDValue Chain = CLI.Chain;
2666 SDValue Callee = CLI.Callee;
2667 bool &isTailCall = CLI.IsTailCall;
2668 CallingConv::ID CallConv = CLI.CallConv;
2669 bool isVarArg = CLI.IsVarArg;
2671 // MIPs target does not yet support tail call optimization.
2674 MachineFunction &MF = DAG.getMachineFunction();
2675 MachineFrameInfo *MFI = MF.getFrameInfo();
2676 const TargetFrameLowering *TFL = MF.getTarget().getFrameLowering();
2677 bool IsPIC = getTargetMachine().getRelocationModel() == Reloc::PIC_;
2678 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
2680 // Analyze operands of the call, assigning locations to each operand.
2681 SmallVector<CCValAssign, 16> ArgLocs;
2682 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2683 getTargetMachine(), ArgLocs, *DAG.getContext());
2685 if (CallConv == CallingConv::Fast)
2686 CCInfo.AnalyzeCallOperands(Outs, CC_Mips_FastCC);
2688 CCInfo.AnalyzeCallOperands(Outs, CC_MipsO32);
2690 AnalyzeMips64CallOperands(CCInfo, Outs);
2692 CCInfo.AnalyzeCallOperands(Outs, CC_Mips);
2694 // Get a count of how many bytes are to be pushed on the stack.
2695 unsigned NextStackOffset = CCInfo.getNextStackOffset();
2696 unsigned StackAlignment = TFL->getStackAlignment();
2697 NextStackOffset = RoundUpToAlignment(NextStackOffset, StackAlignment);
2699 // Update size of the maximum argument space.
2700 // For O32, a minimum of four words (16 bytes) of argument space is
2702 if (IsO32 && (CallConv != CallingConv::Fast))
2703 NextStackOffset = std::max(NextStackOffset, (unsigned)16);
2705 // Chain is the output chain of the last Load/Store or CopyToReg node.
2706 // ByValChain is the output chain of the last Memcpy node created for copying
2707 // byval arguments to the stack.
2708 SDValue NextStackOffsetVal = DAG.getIntPtrConstant(NextStackOffset, true);
2709 Chain = DAG.getCALLSEQ_START(Chain, NextStackOffsetVal);
2711 SDValue StackPtr = DAG.getCopyFromReg(Chain, dl,
2712 IsN64 ? Mips::SP_64 : Mips::SP,
2715 if (MipsFI->getMaxCallFrameSize() < NextStackOffset)
2716 MipsFI->setMaxCallFrameSize(NextStackOffset);
2718 // With EABI is it possible to have 16 args on registers.
2719 SmallVector<std::pair<unsigned, SDValue>, 16> RegsToPass;
2720 SmallVector<SDValue, 8> MemOpChains;
2722 // Walk the register/memloc assignments, inserting copies/loads.
2723 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2724 SDValue Arg = OutVals[i];
2725 CCValAssign &VA = ArgLocs[i];
2726 MVT ValVT = VA.getValVT(), LocVT = VA.getLocVT();
2727 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2730 if (Flags.isByVal()) {
2731 assert(Flags.getByValSize() &&
2732 "ByVal args of size 0 should have been ignored by front-end.");
2734 WriteByValArg(Chain, dl, RegsToPass, MemOpChains, StackPtr,
2735 MFI, DAG, Arg, VA, Flags, getPointerTy(),
2736 Subtarget->isLittle());
2738 PassByValArg64(Chain, dl, RegsToPass, MemOpChains, StackPtr,
2739 MFI, DAG, Arg, VA, Flags, getPointerTy(),
2740 Subtarget->isLittle());
2744 // Promote the value if needed.
2745 switch (VA.getLocInfo()) {
2746 default: llvm_unreachable("Unknown loc info!");
2747 case CCValAssign::Full:
2748 if (VA.isRegLoc()) {
2749 if ((ValVT == MVT::f32 && LocVT == MVT::i32) ||
2750 (ValVT == MVT::f64 && LocVT == MVT::i64))
2751 Arg = DAG.getNode(ISD::BITCAST, dl, LocVT, Arg);
2752 else if (ValVT == MVT::f64 && LocVT == MVT::i32) {
2753 SDValue Lo = DAG.getNode(MipsISD::ExtractElementF64, dl, MVT::i32,
2754 Arg, DAG.getConstant(0, MVT::i32));
2755 SDValue Hi = DAG.getNode(MipsISD::ExtractElementF64, dl, MVT::i32,
2756 Arg, DAG.getConstant(1, MVT::i32));
2757 if (!Subtarget->isLittle())
2759 unsigned LocRegLo = VA.getLocReg();
2760 unsigned LocRegHigh = getNextIntArgReg(LocRegLo);
2761 RegsToPass.push_back(std::make_pair(LocRegLo, Lo));
2762 RegsToPass.push_back(std::make_pair(LocRegHigh, Hi));
2767 case CCValAssign::SExt:
2768 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, LocVT, Arg);
2770 case CCValAssign::ZExt:
2771 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, LocVT, Arg);
2773 case CCValAssign::AExt:
2774 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, LocVT, Arg);
2778 // Arguments that can be passed on register must be kept at
2779 // RegsToPass vector
2780 if (VA.isRegLoc()) {
2781 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
2785 // Register can't get to this point...
2786 assert(VA.isMemLoc());
2788 // emit ISD::STORE whichs stores the
2789 // parameter value to a stack Location
2790 SDValue PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr,
2791 DAG.getIntPtrConstant(VA.getLocMemOffset()));
2792 MemOpChains.push_back(DAG.getStore(Chain, dl, Arg, PtrOff,
2793 MachinePointerInfo(), false, false, 0));
2796 // Transform all store nodes into one single node because all store
2797 // nodes are independent of each other.
2798 if (!MemOpChains.empty())
2799 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2800 &MemOpChains[0], MemOpChains.size());
2802 // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
2803 // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
2804 // node so that legalize doesn't hack it.
2805 unsigned char OpFlag;
2806 bool IsPICCall = (IsN64 || IsPIC); // true if calls are translated to jalr $25
2807 bool GlobalOrExternal = false;
2810 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
2811 if (IsPICCall && G->getGlobal()->hasInternalLinkage()) {
2812 OpFlag = IsO32 ? MipsII::MO_GOT : MipsII::MO_GOT_PAGE;
2813 unsigned char LoFlag = IsO32 ? MipsII::MO_ABS_LO : MipsII::MO_GOT_OFST;
2814 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl, getPointerTy(), 0,
2816 CalleeLo = DAG.getTargetGlobalAddress(G->getGlobal(), dl, getPointerTy(),
2819 OpFlag = IsPICCall ? MipsII::MO_GOT_CALL : MipsII::MO_NO_FLAG;
2820 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl,
2821 getPointerTy(), 0, OpFlag);
2824 GlobalOrExternal = true;
2826 else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
2827 if (IsN64 || (!IsO32 && IsPIC))
2828 OpFlag = MipsII::MO_GOT_DISP;
2829 else if (!IsPIC) // !N64 && static
2830 OpFlag = MipsII::MO_NO_FLAG;
2832 OpFlag = MipsII::MO_GOT_CALL;
2833 Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy(),
2835 GlobalOrExternal = true;
2840 // Create nodes that load address of callee and copy it to T9
2842 if (GlobalOrExternal) {
2843 // Load callee address
2844 Callee = DAG.getNode(MipsISD::Wrapper, dl, getPointerTy(),
2845 GetGlobalReg(DAG, getPointerTy()), Callee);
2846 SDValue LoadValue = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
2847 Callee, MachinePointerInfo::getGOT(),
2848 false, false, false, 0);
2850 // Use GOT+LO if callee has internal linkage.
2851 if (CalleeLo.getNode()) {
2852 SDValue Lo = DAG.getNode(MipsISD::Lo, dl, getPointerTy(), CalleeLo);
2853 Callee = DAG.getNode(ISD::ADD, dl, getPointerTy(), LoadValue, Lo);
2859 // T9 register operand.
2862 // T9 should contain the address of the callee function if
2863 // -reloction-model=pic or it is an indirect call.
2864 if (IsPICCall || !GlobalOrExternal) {
2866 unsigned T9Reg = IsN64 ? Mips::T9_64 : Mips::T9;
2867 Chain = DAG.getCopyToReg(Chain, dl, T9Reg, Callee, SDValue(0, 0));
2868 InFlag = Chain.getValue(1);
2870 if (Subtarget->inMips16Mode())
2871 T9 = DAG.getRegister(T9Reg, getPointerTy());
2873 Callee = DAG.getRegister(T9Reg, getPointerTy());
2876 // Insert node "GP copy globalreg" before call to function.
2877 // Lazy-binding stubs require GP to point to the GOT.
2879 unsigned GPReg = IsN64 ? Mips::GP_64 : Mips::GP;
2880 EVT Ty = IsN64 ? MVT::i64 : MVT::i32;
2881 RegsToPass.push_back(std::make_pair(GPReg, GetGlobalReg(DAG, Ty)));
2884 // Build a sequence of copy-to-reg nodes chained together with token
2885 // chain and flag operands which copy the outgoing args into registers.
2886 // The InFlag in necessary since all emitted instructions must be
2888 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2889 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
2890 RegsToPass[i].second, InFlag);
2891 InFlag = Chain.getValue(1);
2894 // MipsJmpLink = #chain, #target_address, #opt_in_flags...
2895 // = Chain, Callee, Reg#1, Reg#2, ...
2897 // Returns a chain & a flag for retval copy to use.
2898 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
2899 SmallVector<SDValue, 8> Ops;
2900 Ops.push_back(Chain);
2901 Ops.push_back(Callee);
2903 // Add argument registers to the end of the list so that they are
2904 // known live into the call.
2905 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
2906 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
2907 RegsToPass[i].second.getValueType()));
2909 // Add T9 register operand.
2913 // Add a register mask operand representing the call-preserved registers.
2914 const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
2915 const uint32_t *Mask = TRI->getCallPreservedMask(CallConv);
2916 assert(Mask && "Missing call preserved mask for calling convention");
2917 Ops.push_back(DAG.getRegisterMask(Mask));
2919 if (InFlag.getNode())
2920 Ops.push_back(InFlag);
2922 Chain = DAG.getNode(MipsISD::JmpLink, dl, NodeTys, &Ops[0], Ops.size());
2923 InFlag = Chain.getValue(1);
2925 // Create the CALLSEQ_END node.
2926 Chain = DAG.getCALLSEQ_END(Chain, NextStackOffsetVal,
2927 DAG.getIntPtrConstant(0, true), InFlag);
2928 InFlag = Chain.getValue(1);
2930 // Handle result values, copying them out of physregs into vregs that we
2932 return LowerCallResult(Chain, InFlag, CallConv, isVarArg,
2933 Ins, dl, DAG, InVals);
2936 /// LowerCallResult - Lower the result values of a call into the
2937 /// appropriate copies out of appropriate physical registers.
2939 MipsTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
2940 CallingConv::ID CallConv, bool isVarArg,
2941 const SmallVectorImpl<ISD::InputArg> &Ins,
2942 DebugLoc dl, SelectionDAG &DAG,
2943 SmallVectorImpl<SDValue> &InVals) const {
2944 // Assign locations to each value returned by this call.
2945 SmallVector<CCValAssign, 16> RVLocs;
2946 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2947 getTargetMachine(), RVLocs, *DAG.getContext());
2949 CCInfo.AnalyzeCallResult(Ins, RetCC_Mips);
2951 // Copy all of the result registers out of their specified physreg.
2952 for (unsigned i = 0; i != RVLocs.size(); ++i) {
2953 Chain = DAG.getCopyFromReg(Chain, dl, RVLocs[i].getLocReg(),
2954 RVLocs[i].getValVT(), InFlag).getValue(1);
2955 InFlag = Chain.getValue(2);
2956 InVals.push_back(Chain.getValue(0));
2962 //===----------------------------------------------------------------------===//
2963 // Formal Arguments Calling Convention Implementation
2964 //===----------------------------------------------------------------------===//
2965 static void ReadByValArg(MachineFunction &MF, SDValue Chain, DebugLoc dl,
2966 std::vector<SDValue> &OutChains,
2967 SelectionDAG &DAG, unsigned NumWords, SDValue FIN,
2968 const CCValAssign &VA, const ISD::ArgFlagsTy &Flags,
2969 const Argument *FuncArg) {
2970 unsigned LocMem = VA.getLocMemOffset();
2971 unsigned FirstWord = LocMem / 4;
2973 // copy register A0 - A3 to frame object
2974 for (unsigned i = 0; i < NumWords; ++i) {
2975 unsigned CurWord = FirstWord + i;
2976 if (CurWord >= O32IntRegsSize)
2979 unsigned SrcReg = O32IntRegs[CurWord];
2980 unsigned Reg = AddLiveIn(MF, SrcReg, &Mips::CPURegsRegClass);
2981 SDValue StorePtr = DAG.getNode(ISD::ADD, dl, MVT::i32, FIN,
2982 DAG.getConstant(i * 4, MVT::i32));
2983 SDValue Store = DAG.getStore(Chain, dl, DAG.getRegister(Reg, MVT::i32),
2984 StorePtr, MachinePointerInfo(FuncArg, i * 4),
2986 OutChains.push_back(Store);
2990 // Create frame object on stack and copy registers used for byval passing to it.
2992 CopyMips64ByValRegs(MachineFunction &MF, SDValue Chain, DebugLoc dl,
2993 std::vector<SDValue> &OutChains, SelectionDAG &DAG,
2994 const CCValAssign &VA, const ISD::ArgFlagsTy &Flags,
2995 MachineFrameInfo *MFI, bool IsRegLoc,
2996 SmallVectorImpl<SDValue> &InVals, MipsFunctionInfo *MipsFI,
2997 EVT PtrTy, const Argument *FuncArg) {
2998 const uint16_t *Reg = Mips64IntRegs + 8;
2999 int FOOffset; // Frame object offset from virtual frame pointer.
3002 Reg = std::find(Mips64IntRegs, Mips64IntRegs + 8, VA.getLocReg());
3003 FOOffset = (Reg - Mips64IntRegs) * 8 - 8 * 8;
3006 FOOffset = VA.getLocMemOffset();
3008 // Create frame object.
3009 unsigned NumRegs = (Flags.getByValSize() + 7) / 8;
3010 unsigned LastFI = MFI->CreateFixedObject(NumRegs * 8, FOOffset, true);
3011 SDValue FIN = DAG.getFrameIndex(LastFI, PtrTy);
3012 InVals.push_back(FIN);
3014 // Copy arg registers.
3015 for (unsigned I = 0; (Reg != Mips64IntRegs + 8) && (I < NumRegs);
3017 unsigned VReg = AddLiveIn(MF, *Reg, &Mips::CPU64RegsRegClass);
3018 SDValue StorePtr = DAG.getNode(ISD::ADD, dl, PtrTy, FIN,
3019 DAG.getConstant(I * 8, PtrTy));
3020 SDValue Store = DAG.getStore(Chain, dl, DAG.getRegister(VReg, MVT::i64),
3021 StorePtr, MachinePointerInfo(FuncArg, I * 8),
3023 OutChains.push_back(Store);
3029 /// LowerFormalArguments - transform physical registers into virtual registers
3030 /// and generate load operations for arguments places on the stack.
3032 MipsTargetLowering::LowerFormalArguments(SDValue Chain,
3033 CallingConv::ID CallConv,
3035 const SmallVectorImpl<ISD::InputArg> &Ins,
3036 DebugLoc dl, SelectionDAG &DAG,
3037 SmallVectorImpl<SDValue> &InVals)
3039 MachineFunction &MF = DAG.getMachineFunction();
3040 MachineFrameInfo *MFI = MF.getFrameInfo();
3041 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
3043 MipsFI->setVarArgsFrameIndex(0);
3045 // Used with vargs to acumulate store chains.
3046 std::vector<SDValue> OutChains;
3048 // Assign locations to all of the incoming arguments.
3049 SmallVector<CCValAssign, 16> ArgLocs;
3050 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
3051 getTargetMachine(), ArgLocs, *DAG.getContext());
3053 if (CallConv == CallingConv::Fast)
3054 CCInfo.AnalyzeFormalArguments(Ins, CC_Mips_FastCC);
3056 CCInfo.AnalyzeFormalArguments(Ins, CC_MipsO32);
3058 CCInfo.AnalyzeFormalArguments(Ins, CC_Mips);
3060 Function::const_arg_iterator FuncArg =
3061 DAG.getMachineFunction().getFunction()->arg_begin();
3062 int LastFI = 0;// MipsFI->LastInArgFI is 0 at the entry of this function.
3064 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i, ++FuncArg) {
3065 CCValAssign &VA = ArgLocs[i];
3066 EVT ValVT = VA.getValVT();
3067 ISD::ArgFlagsTy Flags = Ins[i].Flags;
3068 bool IsRegLoc = VA.isRegLoc();
3070 if (Flags.isByVal()) {
3071 assert(Flags.getByValSize() &&
3072 "ByVal args of size 0 should have been ignored by front-end.");
3074 unsigned NumWords = (Flags.getByValSize() + 3) / 4;
3075 LastFI = MFI->CreateFixedObject(NumWords * 4, VA.getLocMemOffset(),
3077 SDValue FIN = DAG.getFrameIndex(LastFI, getPointerTy());
3078 InVals.push_back(FIN);
3079 ReadByValArg(MF, Chain, dl, OutChains, DAG, NumWords, FIN, VA, Flags,
3082 LastFI = CopyMips64ByValRegs(MF, Chain, dl, OutChains, DAG, VA, Flags,
3083 MFI, IsRegLoc, InVals, MipsFI,
3084 getPointerTy(), &*FuncArg);
3088 // Arguments stored on registers
3090 EVT RegVT = VA.getLocVT();
3091 unsigned ArgReg = VA.getLocReg();
3092 const TargetRegisterClass *RC;
3094 if (RegVT == MVT::i32)
3095 RC = &Mips::CPURegsRegClass;
3096 else if (RegVT == MVT::i64)
3097 RC = &Mips::CPU64RegsRegClass;
3098 else if (RegVT == MVT::f32)
3099 RC = &Mips::FGR32RegClass;
3100 else if (RegVT == MVT::f64)
3101 RC = HasMips64 ? &Mips::FGR64RegClass : &Mips::AFGR64RegClass;
3103 llvm_unreachable("RegVT not supported by FormalArguments Lowering");
3105 // Transform the arguments stored on
3106 // physical registers into virtual ones
3107 unsigned Reg = AddLiveIn(DAG.getMachineFunction(), ArgReg, RC);
3108 SDValue ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
3110 // If this is an 8 or 16-bit value, it has been passed promoted
3111 // to 32 bits. Insert an assert[sz]ext to capture this, then
3112 // truncate to the right size.
3113 if (VA.getLocInfo() != CCValAssign::Full) {
3114 unsigned Opcode = 0;
3115 if (VA.getLocInfo() == CCValAssign::SExt)
3116 Opcode = ISD::AssertSext;
3117 else if (VA.getLocInfo() == CCValAssign::ZExt)
3118 Opcode = ISD::AssertZext;
3120 ArgValue = DAG.getNode(Opcode, dl, RegVT, ArgValue,
3121 DAG.getValueType(ValVT));
3122 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, ValVT, ArgValue);
3125 // Handle floating point arguments passed in integer registers.
3126 if ((RegVT == MVT::i32 && ValVT == MVT::f32) ||
3127 (RegVT == MVT::i64 && ValVT == MVT::f64))
3128 ArgValue = DAG.getNode(ISD::BITCAST, dl, ValVT, ArgValue);
3129 else if (IsO32 && RegVT == MVT::i32 && ValVT == MVT::f64) {
3130 unsigned Reg2 = AddLiveIn(DAG.getMachineFunction(),
3131 getNextIntArgReg(ArgReg), RC);
3132 SDValue ArgValue2 = DAG.getCopyFromReg(Chain, dl, Reg2, RegVT);
3133 if (!Subtarget->isLittle())
3134 std::swap(ArgValue, ArgValue2);
3135 ArgValue = DAG.getNode(MipsISD::BuildPairF64, dl, MVT::f64,
3136 ArgValue, ArgValue2);
3139 InVals.push_back(ArgValue);
3140 } else { // VA.isRegLoc()
3143 assert(VA.isMemLoc());
3145 // The stack pointer offset is relative to the caller stack frame.
3146 LastFI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,
3147 VA.getLocMemOffset(), true);
3149 // Create load nodes to retrieve arguments from the stack
3150 SDValue FIN = DAG.getFrameIndex(LastFI, getPointerTy());
3151 InVals.push_back(DAG.getLoad(ValVT, dl, Chain, FIN,
3152 MachinePointerInfo::getFixedStack(LastFI),
3153 false, false, false, 0));
3157 // The mips ABIs for returning structs by value requires that we copy
3158 // the sret argument into $v0 for the return. Save the argument into
3159 // a virtual register so that we can access it from the return points.
3160 if (DAG.getMachineFunction().getFunction()->hasStructRetAttr()) {
3161 unsigned Reg = MipsFI->getSRetReturnReg();
3163 Reg = MF.getRegInfo().createVirtualRegister(getRegClassFor(MVT::i32));
3164 MipsFI->setSRetReturnReg(Reg);
3166 SDValue Copy = DAG.getCopyToReg(DAG.getEntryNode(), dl, Reg, InVals[0]);
3167 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Copy, Chain);
3171 unsigned NumOfRegs = IsO32 ? 4 : 8;
3172 const uint16_t *ArgRegs = IsO32 ? O32IntRegs : Mips64IntRegs;
3173 unsigned Idx = CCInfo.getFirstUnallocated(ArgRegs, NumOfRegs);
3174 int FirstRegSlotOffset = IsO32 ? 0 : -64 ; // offset of $a0's slot.
3175 const TargetRegisterClass *RC = IsO32 ?
3176 (const TargetRegisterClass*)&Mips::CPURegsRegClass :
3177 (const TargetRegisterClass*)&Mips::CPU64RegsRegClass;
3178 unsigned RegSize = RC->getSize();
3179 int RegSlotOffset = FirstRegSlotOffset + Idx * RegSize;
3181 // Offset of the first variable argument from stack pointer.
3182 int FirstVaArgOffset;
3184 if (IsO32 || (Idx == NumOfRegs)) {
3186 (CCInfo.getNextStackOffset() + RegSize - 1) / RegSize * RegSize;
3188 FirstVaArgOffset = RegSlotOffset;
3190 // Record the frame index of the first variable argument
3191 // which is a value necessary to VASTART.
3192 LastFI = MFI->CreateFixedObject(RegSize, FirstVaArgOffset, true);
3193 MipsFI->setVarArgsFrameIndex(LastFI);
3195 // Copy the integer registers that have not been used for argument passing
3196 // to the argument register save area. For O32, the save area is allocated
3197 // in the caller's stack frame, while for N32/64, it is allocated in the
3198 // callee's stack frame.
3199 for (int StackOffset = RegSlotOffset;
3200 Idx < NumOfRegs; ++Idx, StackOffset += RegSize) {
3201 unsigned Reg = AddLiveIn(DAG.getMachineFunction(), ArgRegs[Idx], RC);
3202 SDValue ArgValue = DAG.getCopyFromReg(Chain, dl, Reg,
3203 MVT::getIntegerVT(RegSize * 8));
3204 LastFI = MFI->CreateFixedObject(RegSize, StackOffset, true);
3205 SDValue PtrOff = DAG.getFrameIndex(LastFI, getPointerTy());
3206 OutChains.push_back(DAG.getStore(Chain, dl, ArgValue, PtrOff,
3207 MachinePointerInfo(), false, false, 0));
3211 MipsFI->setLastInArgFI(LastFI);
3213 // All stores are grouped in one node to allow the matching between
3214 // the size of Ins and InVals. This only happens when on varg functions
3215 if (!OutChains.empty()) {
3216 OutChains.push_back(Chain);
3217 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
3218 &OutChains[0], OutChains.size());
3224 //===----------------------------------------------------------------------===//
3225 // Return Value Calling Convention Implementation
3226 //===----------------------------------------------------------------------===//
3229 MipsTargetLowering::LowerReturn(SDValue Chain,
3230 CallingConv::ID CallConv, bool isVarArg,
3231 const SmallVectorImpl<ISD::OutputArg> &Outs,
3232 const SmallVectorImpl<SDValue> &OutVals,
3233 DebugLoc dl, SelectionDAG &DAG) const {
3235 // CCValAssign - represent the assignment of
3236 // the return value to a location
3237 SmallVector<CCValAssign, 16> RVLocs;
3239 // CCState - Info about the registers and stack slot.
3240 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
3241 getTargetMachine(), RVLocs, *DAG.getContext());
3243 // Analize return values.
3244 CCInfo.AnalyzeReturn(Outs, RetCC_Mips);
3246 // If this is the first return lowered for this function, add
3247 // the regs to the liveout set for the function.
3248 if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
3249 for (unsigned i = 0; i != RVLocs.size(); ++i)
3250 if (RVLocs[i].isRegLoc())
3251 DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
3256 // Copy the result values into the output registers.
3257 for (unsigned i = 0; i != RVLocs.size(); ++i) {
3258 CCValAssign &VA = RVLocs[i];
3259 assert(VA.isRegLoc() && "Can only return in registers!");
3261 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), OutVals[i], Flag);
3263 // guarantee that all emitted copies are
3264 // stuck together, avoiding something bad
3265 Flag = Chain.getValue(1);
3268 // The mips ABIs for returning structs by value requires that we copy
3269 // the sret argument into $v0 for the return. We saved the argument into
3270 // a virtual register in the entry block, so now we copy the value out
3272 if (DAG.getMachineFunction().getFunction()->hasStructRetAttr()) {
3273 MachineFunction &MF = DAG.getMachineFunction();
3274 MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
3275 unsigned Reg = MipsFI->getSRetReturnReg();
3278 llvm_unreachable("sret virtual register not created in the entry block");
3279 SDValue Val = DAG.getCopyFromReg(Chain, dl, Reg, getPointerTy());
3281 Chain = DAG.getCopyToReg(Chain, dl, Mips::V0, Val, Flag);
3282 Flag = Chain.getValue(1);
3285 // Return on Mips is always a "jr $ra"
3287 return DAG.getNode(MipsISD::Ret, dl, MVT::Other, Chain, Flag);
3290 return DAG.getNode(MipsISD::Ret, dl, MVT::Other, Chain);
3293 //===----------------------------------------------------------------------===//
3294 // Mips Inline Assembly Support
3295 //===----------------------------------------------------------------------===//
3297 /// getConstraintType - Given a constraint letter, return the type of
3298 /// constraint it is for this target.
3299 MipsTargetLowering::ConstraintType MipsTargetLowering::
3300 getConstraintType(const std::string &Constraint) const
3302 // Mips specific constrainy
3303 // GCC config/mips/constraints.md
3305 // 'd' : An address register. Equivalent to r
3306 // unless generating MIPS16 code.
3307 // 'y' : Equivalent to r; retained for
3308 // backwards compatibility.
3309 // 'c' : A register suitable for use in an indirect
3310 // jump. This will always be $25 for -mabicalls.
3311 // 'l' : The lo register. 1 word storage.
3312 // 'x' : The hilo register pair. Double word storage.
3313 if (Constraint.size() == 1) {
3314 switch (Constraint[0]) {
3322 return C_RegisterClass;
3325 return TargetLowering::getConstraintType(Constraint);
3328 /// Examine constraint type and operand type and determine a weight value.
3329 /// This object must already have been set up with the operand type
3330 /// and the current alternative constraint selected.
3331 TargetLowering::ConstraintWeight
3332 MipsTargetLowering::getSingleConstraintMatchWeight(
3333 AsmOperandInfo &info, const char *constraint) const {
3334 ConstraintWeight weight = CW_Invalid;
3335 Value *CallOperandVal = info.CallOperandVal;
3336 // If we don't have a value, we can't do a match,
3337 // but allow it at the lowest weight.
3338 if (CallOperandVal == NULL)
3340 Type *type = CallOperandVal->getType();
3341 // Look at the constraint type.
3342 switch (*constraint) {
3344 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
3348 if (type->isIntegerTy())
3349 weight = CW_Register;
3352 if (type->isFloatTy())
3353 weight = CW_Register;
3355 case 'c': // $25 for indirect jumps
3356 case 'l': // lo register
3357 case 'x': // hilo register pair
3358 if (type->isIntegerTy())
3359 weight = CW_SpecificReg;
3361 case 'I': // signed 16 bit immediate
3362 case 'J': // integer zero
3363 case 'K': // unsigned 16 bit immediate
3364 case 'L': // signed 32 bit immediate where lower 16 bits are 0
3365 case 'N': // immediate in the range of -65535 to -1 (inclusive)
3366 case 'O': // signed 15 bit immediate (+- 16383)
3367 case 'P': // immediate in the range of 65535 to 1 (inclusive)
3368 if (isa<ConstantInt>(CallOperandVal))
3369 weight = CW_Constant;
3375 /// Given a register class constraint, like 'r', if this corresponds directly
3376 /// to an LLVM register class, return a register of 0 and the register class
3378 std::pair<unsigned, const TargetRegisterClass*> MipsTargetLowering::
3379 getRegForInlineAsmConstraint(const std::string &Constraint, EVT VT) const
3381 if (Constraint.size() == 1) {
3382 switch (Constraint[0]) {
3383 case 'd': // Address register. Same as 'r' unless generating MIPS16 code.
3384 case 'y': // Same as 'r'. Exists for compatibility.
3386 if (VT == MVT::i32 || VT == MVT::i16 || VT == MVT::i8) {
3387 if (Subtarget->inMips16Mode())
3388 return std::make_pair(0U, &Mips::CPU16RegsRegClass);
3389 return std::make_pair(0U, &Mips::CPURegsRegClass);
3391 if (VT == MVT::i64 && !HasMips64)
3392 return std::make_pair(0U, &Mips::CPURegsRegClass);
3393 if (VT == MVT::i64 && HasMips64)
3394 return std::make_pair(0U, &Mips::CPU64RegsRegClass);
3395 // This will generate an error message
3396 return std::make_pair(0u, static_cast<const TargetRegisterClass*>(0));
3399 return std::make_pair(0U, &Mips::FGR32RegClass);
3400 if ((VT == MVT::f64) && (!Subtarget->isSingleFloat())) {
3401 if (Subtarget->isFP64bit())
3402 return std::make_pair(0U, &Mips::FGR64RegClass);
3403 return std::make_pair(0U, &Mips::AFGR64RegClass);
3406 case 'c': // register suitable for indirect jump
3408 return std::make_pair((unsigned)Mips::T9, &Mips::CPURegsRegClass);
3409 assert(VT == MVT::i64 && "Unexpected type.");
3410 return std::make_pair((unsigned)Mips::T9_64, &Mips::CPU64RegsRegClass);
3411 case 'l': // register suitable for indirect jump
3413 return std::make_pair((unsigned)Mips::LO, &Mips::HILORegClass);
3414 return std::make_pair((unsigned)Mips::LO64, &Mips::HILO64RegClass);
3415 case 'x': // register suitable for indirect jump
3416 // Fixme: Not triggering the use of both hi and low
3417 // This will generate an error message
3418 return std::make_pair(0u, static_cast<const TargetRegisterClass*>(0));
3421 return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
3424 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
3425 /// vector. If it is invalid, don't add anything to Ops.
3426 void MipsTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
3427 std::string &Constraint,
3428 std::vector<SDValue>&Ops,
3429 SelectionDAG &DAG) const {
3430 SDValue Result(0, 0);
3432 // Only support length 1 constraints for now.
3433 if (Constraint.length() > 1) return;
3435 char ConstraintLetter = Constraint[0];
3436 switch (ConstraintLetter) {
3437 default: break; // This will fall through to the generic implementation
3438 case 'I': // Signed 16 bit constant
3439 // If this fails, the parent routine will give an error
3440 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3441 EVT Type = Op.getValueType();
3442 int64_t Val = C->getSExtValue();
3443 if (isInt<16>(Val)) {
3444 Result = DAG.getTargetConstant(Val, Type);
3449 case 'J': // integer zero
3450 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3451 EVT Type = Op.getValueType();
3452 int64_t Val = C->getZExtValue();
3454 Result = DAG.getTargetConstant(0, Type);
3459 case 'K': // unsigned 16 bit immediate
3460 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3461 EVT Type = Op.getValueType();
3462 uint64_t Val = (uint64_t)C->getZExtValue();
3463 if (isUInt<16>(Val)) {
3464 Result = DAG.getTargetConstant(Val, Type);
3469 case 'L': // signed 32 bit immediate where lower 16 bits are 0
3470 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3471 EVT Type = Op.getValueType();
3472 int64_t Val = C->getSExtValue();
3473 if ((isInt<32>(Val)) && ((Val & 0xffff) == 0)){
3474 Result = DAG.getTargetConstant(Val, Type);
3479 case 'N': // immediate in the range of -65535 to -1 (inclusive)
3480 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3481 EVT Type = Op.getValueType();
3482 int64_t Val = C->getSExtValue();
3483 if ((Val >= -65535) && (Val <= -1)) {
3484 Result = DAG.getTargetConstant(Val, Type);
3489 case 'O': // signed 15 bit immediate
3490 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3491 EVT Type = Op.getValueType();
3492 int64_t Val = C->getSExtValue();
3493 if ((isInt<15>(Val))) {
3494 Result = DAG.getTargetConstant(Val, Type);
3499 case 'P': // immediate in the range of 1 to 65535 (inclusive)
3500 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
3501 EVT Type = Op.getValueType();
3502 int64_t Val = C->getSExtValue();
3503 if ((Val <= 65535) && (Val >= 1)) {
3504 Result = DAG.getTargetConstant(Val, Type);
3511 if (Result.getNode()) {
3512 Ops.push_back(Result);
3516 TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
3520 MipsTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
3521 // The Mips target isn't yet aware of offsets.
3525 EVT MipsTargetLowering::getOptimalMemOpType(uint64_t Size, unsigned DstAlign,
3526 unsigned SrcAlign, bool IsZeroVal,
3528 MachineFunction &MF) const {
3529 if (Subtarget->hasMips64())
3535 bool MipsTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
3536 if (VT != MVT::f32 && VT != MVT::f64)
3538 if (Imm.isNegZero())
3540 return Imm.isZero();
3543 unsigned MipsTargetLowering::getJumpTableEncoding() const {
3545 return MachineJumpTableInfo::EK_GPRel64BlockAddress;
3547 return TargetLowering::getJumpTableEncoding();