1 ///===-- FastISel.cpp - Implementation of the FastISel class --------------===//
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 contains the implementation of the FastISel class.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Instructions.h"
15 #include "llvm/CodeGen/FastISel.h"
16 #include "llvm/CodeGen/MachineInstrBuilder.h"
17 #include "llvm/CodeGen/MachineRegisterInfo.h"
18 #include "llvm/Target/TargetData.h"
19 #include "llvm/Target/TargetInstrInfo.h"
20 #include "llvm/Target/TargetLowering.h"
21 #include "llvm/Target/TargetMachine.h"
24 unsigned FastISel::getRegForValue(Value *V) {
25 // Look up the value to see if we already have a register for it. We
26 // cache values defined by Instructions across blocks, and other values
27 // only locally. This is because Instructions already have the SSA
28 // def-dominatess-use requirement enforced.
29 if (ValueMap.count(V))
31 unsigned Reg = LocalValueMap[V];
35 MVT::SimpleValueType VT = TLI.getValueType(V->getType()).getSimpleVT();
36 if (ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
37 if (CI->getValue().getActiveBits() > 64)
38 return TargetMaterializeConstant(CI,
39 MBB->getParent()->getConstantPool());
40 // Don't cache constant materializations. To do so would require
41 // tracking what uses they dominate.
42 Reg = FastEmit_i(VT, VT, ISD::Constant, CI->getZExtValue());
43 } else if (isa<GlobalValue>(V)) {
44 return TargetMaterializeConstant(dyn_cast<Constant>(V),
45 MBB->getParent()->getConstantPool());
46 } else if (isa<ConstantPointerNull>(V)) {
47 Reg = FastEmit_i(VT, VT, ISD::Constant, 0);
48 } else if (ConstantFP *CF = dyn_cast<ConstantFP>(V)) {
49 Reg = FastEmit_f(VT, VT, ISD::ConstantFP, CF);
52 const APFloat &Flt = CF->getValueAPF();
53 MVT IntVT = TLI.getPointerTy();
56 uint32_t IntBitWidth = IntVT.getSizeInBits();
57 if (Flt.convertToInteger(x, IntBitWidth, /*isSigned=*/true,
58 APFloat::rmTowardZero) != APFloat::opOK)
59 return TargetMaterializeConstant(CF,
60 MBB->getParent()->getConstantPool());
61 APInt IntVal(IntBitWidth, 2, x);
63 unsigned IntegerReg = FastEmit_i(IntVT.getSimpleVT(), IntVT.getSimpleVT(),
64 ISD::Constant, IntVal.getZExtValue());
66 return TargetMaterializeConstant(CF,
67 MBB->getParent()->getConstantPool());
68 Reg = FastEmit_r(IntVT.getSimpleVT(), VT, ISD::SINT_TO_FP, IntegerReg);
70 return TargetMaterializeConstant(CF,
71 MBB->getParent()->getConstantPool());;
73 } else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
74 if (!SelectOperator(CE, CE->getOpcode())) return 0;
75 Reg = LocalValueMap[CE];
76 } else if (isa<UndefValue>(V)) {
77 Reg = createResultReg(TLI.getRegClassFor(VT));
78 BuildMI(MBB, TII.get(TargetInstrInfo::IMPLICIT_DEF), Reg);
83 if (!Reg && isa<Constant>(V))
84 return TargetMaterializeConstant(cast<Constant>(V),
85 MBB->getParent()->getConstantPool());
87 LocalValueMap[V] = Reg;
91 unsigned FastISel::lookUpRegForValue(Value *V) {
92 // Look up the value to see if we already have a register for it. We
93 // cache values defined by Instructions across blocks, and other values
94 // only locally. This is because Instructions already have the SSA
95 // def-dominatess-use requirement enforced.
96 if (ValueMap.count(V))
98 return LocalValueMap[V];
101 /// UpdateValueMap - Update the value map to include the new mapping for this
102 /// instruction, or insert an extra copy to get the result in a previous
103 /// determined register.
104 /// NOTE: This is only necessary because we might select a block that uses
105 /// a value before we select the block that defines the value. It might be
106 /// possible to fix this by selecting blocks in reverse postorder.
107 void FastISel::UpdateValueMap(Value* I, unsigned Reg) {
108 if (!isa<Instruction>(I)) {
109 LocalValueMap[I] = Reg;
112 if (!ValueMap.count(I))
115 TII.copyRegToReg(*MBB, MBB->end(), ValueMap[I],
116 Reg, MRI.getRegClass(Reg), MRI.getRegClass(Reg));
119 /// SelectBinaryOp - Select and emit code for a binary operator instruction,
120 /// which has an opcode which directly corresponds to the given ISD opcode.
122 bool FastISel::SelectBinaryOp(User *I, ISD::NodeType ISDOpcode) {
123 MVT VT = MVT::getMVT(I->getType(), /*HandleUnknown=*/true);
124 if (VT == MVT::Other || !VT.isSimple())
125 // Unhandled type. Halt "fast" selection and bail.
128 // We only handle legal types. For example, on x86-32 the instruction
129 // selector contains all of the 64-bit instructions from x86-64,
130 // under the assumption that i64 won't be used if the target doesn't
132 if (!TLI.isTypeLegal(VT)) {
133 // MVT::i1 is special. Allow AND and OR (but not XOR) because they
134 // don't require additional zeroing, which makes them easy.
136 (ISDOpcode == ISD::AND || ISDOpcode == ISD::OR))
137 VT = TLI.getTypeToTransformTo(VT);
142 unsigned Op0 = getRegForValue(I->getOperand(0));
144 // Unhandled operand. Halt "fast" selection and bail.
147 // Check if the second operand is a constant and handle it appropriately.
148 if (ConstantInt *CI = dyn_cast<ConstantInt>(I->getOperand(1))) {
149 unsigned ResultReg = FastEmit_ri(VT.getSimpleVT(), VT.getSimpleVT(),
150 ISDOpcode, Op0, CI->getZExtValue());
151 if (ResultReg != 0) {
152 // We successfully emitted code for the given LLVM Instruction.
153 UpdateValueMap(I, ResultReg);
158 // Check if the second operand is a constant float.
159 if (ConstantFP *CF = dyn_cast<ConstantFP>(I->getOperand(1))) {
160 unsigned ResultReg = FastEmit_rf(VT.getSimpleVT(), VT.getSimpleVT(),
162 if (ResultReg != 0) {
163 // We successfully emitted code for the given LLVM Instruction.
164 UpdateValueMap(I, ResultReg);
169 unsigned Op1 = getRegForValue(I->getOperand(1));
171 // Unhandled operand. Halt "fast" selection and bail.
174 // Now we have both operands in registers. Emit the instruction.
175 unsigned ResultReg = FastEmit_rr(VT.getSimpleVT(), VT.getSimpleVT(),
176 ISDOpcode, Op0, Op1);
178 // Target-specific code wasn't able to find a machine opcode for
179 // the given ISD opcode and type. Halt "fast" selection and bail.
182 // We successfully emitted code for the given LLVM Instruction.
183 UpdateValueMap(I, ResultReg);
187 bool FastISel::SelectGetElementPtr(User *I) {
188 unsigned N = getRegForValue(I->getOperand(0));
190 // Unhandled operand. Halt "fast" selection and bail.
193 const Type *Ty = I->getOperand(0)->getType();
194 MVT::SimpleValueType VT = TLI.getPointerTy().getSimpleVT();
195 for (GetElementPtrInst::op_iterator OI = I->op_begin()+1, E = I->op_end();
198 if (const StructType *StTy = dyn_cast<StructType>(Ty)) {
199 unsigned Field = cast<ConstantInt>(Idx)->getZExtValue();
202 uint64_t Offs = TD.getStructLayout(StTy)->getElementOffset(Field);
203 // FIXME: This can be optimized by combining the add with a
205 N = FastEmit_ri_(VT, ISD::ADD, N, Offs, VT);
207 // Unhandled operand. Halt "fast" selection and bail.
210 Ty = StTy->getElementType(Field);
212 Ty = cast<SequentialType>(Ty)->getElementType();
214 // If this is a constant subscript, handle it quickly.
215 if (ConstantInt *CI = dyn_cast<ConstantInt>(Idx)) {
216 if (CI->getZExtValue() == 0) continue;
218 TD.getABITypeSize(Ty)*cast<ConstantInt>(CI)->getSExtValue();
219 N = FastEmit_ri_(VT, ISD::ADD, N, Offs, VT);
221 // Unhandled operand. Halt "fast" selection and bail.
226 // N = N + Idx * ElementSize;
227 uint64_t ElementSize = TD.getABITypeSize(Ty);
228 unsigned IdxN = getRegForValue(Idx);
230 // Unhandled operand. Halt "fast" selection and bail.
233 // If the index is smaller or larger than intptr_t, truncate or extend
235 MVT IdxVT = MVT::getMVT(Idx->getType(), /*HandleUnknown=*/false);
236 if (IdxVT.bitsLT(VT))
237 IdxN = FastEmit_r(IdxVT.getSimpleVT(), VT, ISD::SIGN_EXTEND, IdxN);
238 else if (IdxVT.bitsGT(VT))
239 IdxN = FastEmit_r(IdxVT.getSimpleVT(), VT, ISD::TRUNCATE, IdxN);
241 // Unhandled operand. Halt "fast" selection and bail.
244 if (ElementSize != 1) {
245 IdxN = FastEmit_ri_(VT, ISD::MUL, IdxN, ElementSize, VT);
247 // Unhandled operand. Halt "fast" selection and bail.
250 N = FastEmit_rr(VT, VT, ISD::ADD, N, IdxN);
252 // Unhandled operand. Halt "fast" selection and bail.
257 // We successfully emitted code for the given LLVM Instruction.
258 UpdateValueMap(I, N);
262 bool FastISel::SelectCast(User *I, ISD::NodeType Opcode) {
263 MVT SrcVT = TLI.getValueType(I->getOperand(0)->getType());
264 MVT DstVT = TLI.getValueType(I->getType());
266 if (SrcVT == MVT::Other || !SrcVT.isSimple() ||
267 DstVT == MVT::Other || !DstVT.isSimple() ||
268 !TLI.isTypeLegal(SrcVT) || !TLI.isTypeLegal(DstVT))
269 // Unhandled type. Halt "fast" selection and bail.
272 unsigned InputReg = getRegForValue(I->getOperand(0));
274 // Unhandled operand. Halt "fast" selection and bail.
277 unsigned ResultReg = FastEmit_r(SrcVT.getSimpleVT(),
284 UpdateValueMap(I, ResultReg);
288 bool FastISel::SelectBitCast(User *I) {
289 // If the bitcast doesn't change the type, just use the operand value.
290 if (I->getType() == I->getOperand(0)->getType()) {
291 unsigned Reg = getRegForValue(I->getOperand(0));
294 UpdateValueMap(I, Reg);
298 // Bitcasts of other values become reg-reg copies or BIT_CONVERT operators.
299 MVT SrcVT = TLI.getValueType(I->getOperand(0)->getType());
300 MVT DstVT = TLI.getValueType(I->getType());
302 if (SrcVT == MVT::Other || !SrcVT.isSimple() ||
303 DstVT == MVT::Other || !DstVT.isSimple() ||
304 !TLI.isTypeLegal(SrcVT) || !TLI.isTypeLegal(DstVT))
305 // Unhandled type. Halt "fast" selection and bail.
308 unsigned Op0 = getRegForValue(I->getOperand(0));
310 // Unhandled operand. Halt "fast" selection and bail.
313 // First, try to perform the bitcast by inserting a reg-reg copy.
314 unsigned ResultReg = 0;
315 if (SrcVT.getSimpleVT() == DstVT.getSimpleVT()) {
316 TargetRegisterClass* SrcClass = TLI.getRegClassFor(SrcVT);
317 TargetRegisterClass* DstClass = TLI.getRegClassFor(DstVT);
318 ResultReg = createResultReg(DstClass);
320 bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg,
321 Op0, DstClass, SrcClass);
326 // If the reg-reg copy failed, select a BIT_CONVERT opcode.
328 ResultReg = FastEmit_r(SrcVT.getSimpleVT(), DstVT.getSimpleVT(),
329 ISD::BIT_CONVERT, Op0);
334 UpdateValueMap(I, ResultReg);
339 FastISel::SelectInstruction(Instruction *I) {
340 return SelectOperator(I, I->getOpcode());
344 FastISel::SelectOperator(User *I, unsigned Opcode) {
346 case Instruction::Add: {
347 ISD::NodeType Opc = I->getType()->isFPOrFPVector() ? ISD::FADD : ISD::ADD;
348 return SelectBinaryOp(I, Opc);
350 case Instruction::Sub: {
351 ISD::NodeType Opc = I->getType()->isFPOrFPVector() ? ISD::FSUB : ISD::SUB;
352 return SelectBinaryOp(I, Opc);
354 case Instruction::Mul: {
355 ISD::NodeType Opc = I->getType()->isFPOrFPVector() ? ISD::FMUL : ISD::MUL;
356 return SelectBinaryOp(I, Opc);
358 case Instruction::SDiv:
359 return SelectBinaryOp(I, ISD::SDIV);
360 case Instruction::UDiv:
361 return SelectBinaryOp(I, ISD::UDIV);
362 case Instruction::FDiv:
363 return SelectBinaryOp(I, ISD::FDIV);
364 case Instruction::SRem:
365 return SelectBinaryOp(I, ISD::SREM);
366 case Instruction::URem:
367 return SelectBinaryOp(I, ISD::UREM);
368 case Instruction::FRem:
369 return SelectBinaryOp(I, ISD::FREM);
370 case Instruction::Shl:
371 return SelectBinaryOp(I, ISD::SHL);
372 case Instruction::LShr:
373 return SelectBinaryOp(I, ISD::SRL);
374 case Instruction::AShr:
375 return SelectBinaryOp(I, ISD::SRA);
376 case Instruction::And:
377 return SelectBinaryOp(I, ISD::AND);
378 case Instruction::Or:
379 return SelectBinaryOp(I, ISD::OR);
380 case Instruction::Xor:
381 return SelectBinaryOp(I, ISD::XOR);
383 case Instruction::GetElementPtr:
384 return SelectGetElementPtr(I);
386 case Instruction::Br: {
387 BranchInst *BI = cast<BranchInst>(I);
389 if (BI->isUnconditional()) {
390 MachineFunction::iterator NextMBB =
391 next(MachineFunction::iterator(MBB));
392 BasicBlock *LLVMSucc = BI->getSuccessor(0);
393 MachineBasicBlock *MSucc = MBBMap[LLVMSucc];
395 if (NextMBB != MF.end() && MSucc == NextMBB) {
396 // The unconditional fall-through case, which needs no instructions.
398 // The unconditional branch case.
399 TII.InsertBranch(*MBB, MSucc, NULL, SmallVector<MachineOperand, 0>());
401 MBB->addSuccessor(MSucc);
405 // Conditional branches are not handed yet.
406 // Halt "fast" selection and bail.
410 case Instruction::Unreachable:
414 case Instruction::PHI:
415 // PHI nodes are already emitted.
418 case Instruction::BitCast:
419 return SelectBitCast(I);
421 case Instruction::FPToSI:
422 return SelectCast(I, ISD::FP_TO_SINT);
423 case Instruction::ZExt:
424 return SelectCast(I, ISD::ZERO_EXTEND);
425 case Instruction::SExt:
426 return SelectCast(I, ISD::SIGN_EXTEND);
427 case Instruction::Trunc:
428 return SelectCast(I, ISD::TRUNCATE);
429 case Instruction::SIToFP:
430 return SelectCast(I, ISD::SINT_TO_FP);
432 case Instruction::IntToPtr: // Deliberate fall-through.
433 case Instruction::PtrToInt: {
434 MVT SrcVT = TLI.getValueType(I->getOperand(0)->getType());
435 MVT DstVT = TLI.getValueType(I->getType());
436 if (DstVT.bitsGT(SrcVT))
437 return SelectCast(I, ISD::ZERO_EXTEND);
438 if (DstVT.bitsLT(SrcVT))
439 return SelectCast(I, ISD::TRUNCATE);
440 unsigned Reg = getRegForValue(I->getOperand(0));
441 if (Reg == 0) return false;
442 UpdateValueMap(I, Reg);
447 // Unhandled instruction. Halt "fast" selection and bail.
452 FastISel::FastISel(MachineFunction &mf,
453 DenseMap<const Value *, unsigned> &vm,
454 DenseMap<const BasicBlock *, MachineBasicBlock *> &bm)
459 MRI(MF.getRegInfo()),
461 TD(*TM.getTargetData()),
462 TII(*TM.getInstrInfo()),
463 TLI(*TM.getTargetLowering()) {
466 FastISel::~FastISel() {}
468 unsigned FastISel::FastEmit_(MVT::SimpleValueType, MVT::SimpleValueType,
473 unsigned FastISel::FastEmit_r(MVT::SimpleValueType, MVT::SimpleValueType,
474 ISD::NodeType, unsigned /*Op0*/) {
478 unsigned FastISel::FastEmit_rr(MVT::SimpleValueType, MVT::SimpleValueType,
479 ISD::NodeType, unsigned /*Op0*/,
484 unsigned FastISel::FastEmit_i(MVT::SimpleValueType, MVT::SimpleValueType,
485 ISD::NodeType, uint64_t /*Imm*/) {
489 unsigned FastISel::FastEmit_f(MVT::SimpleValueType, MVT::SimpleValueType,
490 ISD::NodeType, ConstantFP * /*FPImm*/) {
494 unsigned FastISel::FastEmit_ri(MVT::SimpleValueType, MVT::SimpleValueType,
495 ISD::NodeType, unsigned /*Op0*/,
500 unsigned FastISel::FastEmit_rf(MVT::SimpleValueType, MVT::SimpleValueType,
501 ISD::NodeType, unsigned /*Op0*/,
502 ConstantFP * /*FPImm*/) {
506 unsigned FastISel::FastEmit_rri(MVT::SimpleValueType, MVT::SimpleValueType,
508 unsigned /*Op0*/, unsigned /*Op1*/,
513 /// FastEmit_ri_ - This method is a wrapper of FastEmit_ri. It first tries
514 /// to emit an instruction with an immediate operand using FastEmit_ri.
515 /// If that fails, it materializes the immediate into a register and try
516 /// FastEmit_rr instead.
517 unsigned FastISel::FastEmit_ri_(MVT::SimpleValueType VT, ISD::NodeType Opcode,
518 unsigned Op0, uint64_t Imm,
519 MVT::SimpleValueType ImmType) {
520 // First check if immediate type is legal. If not, we can't use the ri form.
521 unsigned ResultReg = FastEmit_ri(VT, VT, Opcode, Op0, Imm);
524 unsigned MaterialReg = FastEmit_i(ImmType, ImmType, ISD::Constant, Imm);
525 if (MaterialReg == 0)
527 return FastEmit_rr(VT, VT, Opcode, Op0, MaterialReg);
530 /// FastEmit_rf_ - This method is a wrapper of FastEmit_ri. It first tries
531 /// to emit an instruction with a floating-point immediate operand using
532 /// FastEmit_rf. If that fails, it materializes the immediate into a register
533 /// and try FastEmit_rr instead.
534 unsigned FastISel::FastEmit_rf_(MVT::SimpleValueType VT, ISD::NodeType Opcode,
535 unsigned Op0, ConstantFP *FPImm,
536 MVT::SimpleValueType ImmType) {
537 // First check if immediate type is legal. If not, we can't use the rf form.
538 unsigned ResultReg = FastEmit_rf(VT, VT, Opcode, Op0, FPImm);
542 // Materialize the constant in a register.
543 unsigned MaterialReg = FastEmit_f(ImmType, ImmType, ISD::ConstantFP, FPImm);
544 if (MaterialReg == 0) {
545 // If the target doesn't have a way to directly enter a floating-point
546 // value into a register, use an alternate approach.
547 // TODO: The current approach only supports floating-point constants
548 // that can be constructed by conversion from integer values. This should
549 // be replaced by code that creates a load from a constant-pool entry,
550 // which will require some target-specific work.
551 const APFloat &Flt = FPImm->getValueAPF();
552 MVT IntVT = TLI.getPointerTy();
555 uint32_t IntBitWidth = IntVT.getSizeInBits();
556 if (Flt.convertToInteger(x, IntBitWidth, /*isSigned=*/true,
557 APFloat::rmTowardZero) != APFloat::opOK)
559 APInt IntVal(IntBitWidth, 2, x);
561 unsigned IntegerReg = FastEmit_i(IntVT.getSimpleVT(), IntVT.getSimpleVT(),
562 ISD::Constant, IntVal.getZExtValue());
565 MaterialReg = FastEmit_r(IntVT.getSimpleVT(), VT,
566 ISD::SINT_TO_FP, IntegerReg);
567 if (MaterialReg == 0)
570 return FastEmit_rr(VT, VT, Opcode, Op0, MaterialReg);
573 unsigned FastISel::createResultReg(const TargetRegisterClass* RC) {
574 return MRI.createVirtualRegister(RC);
577 unsigned FastISel::FastEmitInst_(unsigned MachineInstOpcode,
578 const TargetRegisterClass* RC) {
579 unsigned ResultReg = createResultReg(RC);
580 const TargetInstrDesc &II = TII.get(MachineInstOpcode);
582 BuildMI(MBB, II, ResultReg);
586 unsigned FastISel::FastEmitInst_r(unsigned MachineInstOpcode,
587 const TargetRegisterClass *RC,
589 unsigned ResultReg = createResultReg(RC);
590 const TargetInstrDesc &II = TII.get(MachineInstOpcode);
592 if (II.getNumDefs() >= 1)
593 BuildMI(MBB, II, ResultReg).addReg(Op0);
595 BuildMI(MBB, II).addReg(Op0);
596 bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg,
597 II.ImplicitDefs[0], RC, RC);
605 unsigned FastISel::FastEmitInst_rr(unsigned MachineInstOpcode,
606 const TargetRegisterClass *RC,
607 unsigned Op0, unsigned Op1) {
608 unsigned ResultReg = createResultReg(RC);
609 const TargetInstrDesc &II = TII.get(MachineInstOpcode);
611 if (II.getNumDefs() >= 1)
612 BuildMI(MBB, II, ResultReg).addReg(Op0).addReg(Op1);
614 BuildMI(MBB, II).addReg(Op0).addReg(Op1);
615 bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg,
616 II.ImplicitDefs[0], RC, RC);
623 unsigned FastISel::FastEmitInst_ri(unsigned MachineInstOpcode,
624 const TargetRegisterClass *RC,
625 unsigned Op0, uint64_t Imm) {
626 unsigned ResultReg = createResultReg(RC);
627 const TargetInstrDesc &II = TII.get(MachineInstOpcode);
629 if (II.getNumDefs() >= 1)
630 BuildMI(MBB, II, ResultReg).addReg(Op0).addImm(Imm);
632 BuildMI(MBB, II).addReg(Op0).addImm(Imm);
633 bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg,
634 II.ImplicitDefs[0], RC, RC);
641 unsigned FastISel::FastEmitInst_rf(unsigned MachineInstOpcode,
642 const TargetRegisterClass *RC,
643 unsigned Op0, ConstantFP *FPImm) {
644 unsigned ResultReg = createResultReg(RC);
645 const TargetInstrDesc &II = TII.get(MachineInstOpcode);
647 if (II.getNumDefs() >= 1)
648 BuildMI(MBB, II, ResultReg).addReg(Op0).addFPImm(FPImm);
650 BuildMI(MBB, II).addReg(Op0).addFPImm(FPImm);
651 bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg,
652 II.ImplicitDefs[0], RC, RC);
659 unsigned FastISel::FastEmitInst_rri(unsigned MachineInstOpcode,
660 const TargetRegisterClass *RC,
661 unsigned Op0, unsigned Op1, uint64_t Imm) {
662 unsigned ResultReg = createResultReg(RC);
663 const TargetInstrDesc &II = TII.get(MachineInstOpcode);
665 if (II.getNumDefs() >= 1)
666 BuildMI(MBB, II, ResultReg).addReg(Op0).addReg(Op1).addImm(Imm);
668 BuildMI(MBB, II).addReg(Op0).addReg(Op1).addImm(Imm);
669 bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg,
670 II.ImplicitDefs[0], RC, RC);
677 unsigned FastISel::FastEmitInst_i(unsigned MachineInstOpcode,
678 const TargetRegisterClass *RC,
680 unsigned ResultReg = createResultReg(RC);
681 const TargetInstrDesc &II = TII.get(MachineInstOpcode);
683 if (II.getNumDefs() >= 1)
684 BuildMI(MBB, II, ResultReg).addImm(Imm);
686 BuildMI(MBB, II).addImm(Imm);
687 bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg,
688 II.ImplicitDefs[0], RC, RC);
695 unsigned FastISel::FastEmitInst_extractsubreg(unsigned Op0, uint32_t Idx) {
696 const TargetRegisterClass* RC = MRI.getRegClass(Op0);
697 const TargetRegisterClass* SRC = *(RC->subregclasses_begin()+Idx-1);
699 unsigned ResultReg = createResultReg(SRC);
700 const TargetInstrDesc &II = TII.get(TargetInstrInfo::EXTRACT_SUBREG);
702 if (II.getNumDefs() >= 1)
703 BuildMI(MBB, II, ResultReg).addReg(Op0).addImm(Idx);
705 BuildMI(MBB, II).addReg(Op0).addImm(Idx);
706 bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg,
707 II.ImplicitDefs[0], RC, RC);