1 //===-- llvm/CodeGen/GlobalISel/MachineIRBuilder.cpp - MIBuilder--*- C++ -*-==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 /// This file implements the MachineIRBuidler class.
11 //===----------------------------------------------------------------------===//
12 #include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
14 #include "llvm/CodeGen/MachineFunction.h"
15 #include "llvm/CodeGen/MachineInstr.h"
16 #include "llvm/CodeGen/MachineInstrBuilder.h"
17 #include "llvm/CodeGen/MachineRegisterInfo.h"
18 #include "llvm/IR/DebugInfo.h"
19 #include "llvm/Target/TargetInstrInfo.h"
20 #include "llvm/Target/TargetOpcodes.h"
21 #include "llvm/Target/TargetSubtargetInfo.h"
25 void MachineIRBuilder::setMF(MachineFunction &MF) {
28 this->MRI = &MF.getRegInfo();
29 this->TII = MF.getSubtarget().getInstrInfo();
30 this->DL = DebugLoc();
31 this->II = MachineBasicBlock::iterator();
32 this->InsertedInstr = nullptr;
35 void MachineIRBuilder::setMBB(MachineBasicBlock &MBB) {
38 assert(&getMF() == MBB.getParent() &&
39 "Basic block is in a different function");
42 void MachineIRBuilder::setInstr(MachineInstr &MI) {
43 assert(MI.getParent() && "Instruction is not part of a basic block");
44 setMBB(*MI.getParent());
45 this->II = MI.getIterator();
48 void MachineIRBuilder::setInsertPt(MachineBasicBlock &MBB,
49 MachineBasicBlock::iterator II) {
50 assert(MBB.getParent() == &getMF() &&
51 "Basic block is in a different function");
56 void MachineIRBuilder::recordInsertions(
57 std::function<void(MachineInstr *)> Inserted) {
58 InsertedInstr = std::move(Inserted);
61 void MachineIRBuilder::stopRecordingInsertions() {
62 InsertedInstr = nullptr;
65 //------------------------------------------------------------------------------
66 // Build instruction variants.
67 //------------------------------------------------------------------------------
69 MachineInstrBuilder MachineIRBuilder::buildInstr(unsigned Opcode) {
70 return insertInstr(buildInstrNoInsert(Opcode));
73 MachineInstrBuilder MachineIRBuilder::buildInstrNoInsert(unsigned Opcode) {
74 MachineInstrBuilder MIB = BuildMI(getMF(), DL, getTII().get(Opcode));
79 MachineInstrBuilder MachineIRBuilder::insertInstr(MachineInstrBuilder MIB) {
80 getMBB().insert(getInsertPt(), MIB);
86 MachineInstrBuilder MachineIRBuilder::buildDirectDbgValue(
87 unsigned Reg, const MDNode *Variable, const MDNode *Expr) {
88 assert(isa<DILocalVariable>(Variable) && "not a variable");
89 assert(cast<DIExpression>(Expr)->isValid() && "not an expression");
90 assert(cast<DILocalVariable>(Variable)->isValidLocationForIntrinsic(DL) &&
91 "Expected inlined-at fields to agree");
92 return buildInstr(TargetOpcode::DBG_VALUE)
93 .addReg(Reg, RegState::Debug)
94 .addReg(0, RegState::Debug)
95 .addMetadata(Variable)
99 MachineInstrBuilder MachineIRBuilder::buildIndirectDbgValue(
100 unsigned Reg, unsigned Offset, const MDNode *Variable, const MDNode *Expr) {
101 assert(isa<DILocalVariable>(Variable) && "not a variable");
102 assert(cast<DIExpression>(Expr)->isValid() && "not an expression");
103 assert(cast<DILocalVariable>(Variable)->isValidLocationForIntrinsic(DL) &&
104 "Expected inlined-at fields to agree");
105 return buildInstr(TargetOpcode::DBG_VALUE)
106 .addReg(Reg, RegState::Debug)
108 .addMetadata(Variable)
112 MachineInstrBuilder MachineIRBuilder::buildFIDbgValue(int FI,
113 const MDNode *Variable,
114 const MDNode *Expr) {
115 assert(isa<DILocalVariable>(Variable) && "not a variable");
116 assert(cast<DIExpression>(Expr)->isValid() && "not an expression");
117 assert(cast<DILocalVariable>(Variable)->isValidLocationForIntrinsic(DL) &&
118 "Expected inlined-at fields to agree");
119 return buildInstr(TargetOpcode::DBG_VALUE)
122 .addMetadata(Variable)
126 MachineInstrBuilder MachineIRBuilder::buildConstDbgValue(const Constant &C,
128 const MDNode *Variable,
129 const MDNode *Expr) {
130 assert(isa<DILocalVariable>(Variable) && "not a variable");
131 assert(cast<DIExpression>(Expr)->isValid() && "not an expression");
132 assert(cast<DILocalVariable>(Variable)->isValidLocationForIntrinsic(DL) &&
133 "Expected inlined-at fields to agree");
134 auto MIB = buildInstr(TargetOpcode::DBG_VALUE);
135 if (auto *CI = dyn_cast<ConstantInt>(&C)) {
136 if (CI->getBitWidth() > 64)
139 MIB.addImm(CI->getZExtValue());
140 } else if (auto *CFP = dyn_cast<ConstantFP>(&C)) {
143 // Insert %noreg if we didn't find a usable constant and had to drop it.
147 return MIB.addImm(Offset).addMetadata(Variable).addMetadata(Expr);
150 MachineInstrBuilder MachineIRBuilder::buildFrameIndex(unsigned Res, int Idx) {
151 assert(MRI->getType(Res).isPointer() && "invalid operand type");
152 return buildInstr(TargetOpcode::G_FRAME_INDEX)
157 MachineInstrBuilder MachineIRBuilder::buildGlobalValue(unsigned Res,
158 const GlobalValue *GV) {
159 assert(MRI->getType(Res).isPointer() && "invalid operand type");
160 assert(MRI->getType(Res).getAddressSpace() ==
161 GV->getType()->getAddressSpace() &&
162 "address space mismatch");
164 return buildInstr(TargetOpcode::G_GLOBAL_VALUE)
166 .addGlobalAddress(GV);
169 MachineInstrBuilder MachineIRBuilder::buildAdd(unsigned Res, unsigned Op0,
171 assert((MRI->getType(Res).isScalar() || MRI->getType(Res).isVector()) &&
172 "invalid operand type");
173 assert(MRI->getType(Res) == MRI->getType(Op0) &&
174 MRI->getType(Res) == MRI->getType(Op1) && "type mismatch");
176 return buildInstr(TargetOpcode::G_ADD)
182 MachineInstrBuilder MachineIRBuilder::buildGEP(unsigned Res, unsigned Op0,
184 assert(MRI->getType(Res).isPointer() &&
185 MRI->getType(Res) == MRI->getType(Op0) && "type mismatch");
186 assert(MRI->getType(Op1).isScalar() && "invalid offset type");
188 return buildInstr(TargetOpcode::G_GEP)
194 Optional<MachineInstrBuilder>
195 MachineIRBuilder::materializeGEP(unsigned &Res, unsigned Op0,
196 const LLT &ValueTy, uint64_t Value) {
197 assert(Res == 0 && "Res is a result argument");
198 assert(ValueTy.isScalar() && "invalid offset type");
205 Res = MRI->createGenericVirtualRegister(MRI->getType(Op0));
206 unsigned TmpReg = MRI->createGenericVirtualRegister(ValueTy);
208 buildConstant(TmpReg, Value);
209 return buildGEP(Res, Op0, TmpReg);
212 MachineInstrBuilder MachineIRBuilder::buildPtrMask(unsigned Res, unsigned Op0,
214 assert(MRI->getType(Res).isPointer() &&
215 MRI->getType(Res) == MRI->getType(Op0) && "type mismatch");
217 return buildInstr(TargetOpcode::G_PTR_MASK)
223 MachineInstrBuilder MachineIRBuilder::buildSub(unsigned Res, unsigned Op0,
225 assert((MRI->getType(Res).isScalar() || MRI->getType(Res).isVector()) &&
226 "invalid operand type");
227 assert(MRI->getType(Res) == MRI->getType(Op0) &&
228 MRI->getType(Res) == MRI->getType(Op1) && "type mismatch");
230 return buildInstr(TargetOpcode::G_SUB)
236 MachineInstrBuilder MachineIRBuilder::buildMul(unsigned Res, unsigned Op0,
238 assert((MRI->getType(Res).isScalar() || MRI->getType(Res).isVector()) &&
239 "invalid operand type");
240 assert(MRI->getType(Res) == MRI->getType(Op0) &&
241 MRI->getType(Res) == MRI->getType(Op1) && "type mismatch");
243 return buildInstr(TargetOpcode::G_MUL)
249 MachineInstrBuilder MachineIRBuilder::buildAnd(unsigned Res, unsigned Op0,
251 assert((MRI->getType(Res).isScalar() || MRI->getType(Res).isVector()) &&
252 "invalid operand type");
253 assert(MRI->getType(Res) == MRI->getType(Op0) &&
254 MRI->getType(Res) == MRI->getType(Op1) && "type mismatch");
256 return buildInstr(TargetOpcode::G_AND)
262 MachineInstrBuilder MachineIRBuilder::buildBr(MachineBasicBlock &Dest) {
263 return buildInstr(TargetOpcode::G_BR).addMBB(&Dest);
266 MachineInstrBuilder MachineIRBuilder::buildBrIndirect(unsigned Tgt) {
267 assert(MRI->getType(Tgt).isPointer() && "invalid branch destination");
268 return buildInstr(TargetOpcode::G_BRINDIRECT).addUse(Tgt);
271 MachineInstrBuilder MachineIRBuilder::buildCopy(unsigned Res, unsigned Op) {
272 assert(MRI->getType(Res) == LLT() || MRI->getType(Op) == LLT() ||
273 MRI->getType(Res) == MRI->getType(Op));
274 return buildInstr(TargetOpcode::COPY).addDef(Res).addUse(Op);
277 MachineInstrBuilder MachineIRBuilder::buildConstant(unsigned Res,
278 const ConstantInt &Val) {
279 LLT Ty = MRI->getType(Res);
281 assert((Ty.isScalar() || Ty.isPointer()) && "invalid operand type");
283 const ConstantInt *NewVal = &Val;
284 if (Ty.getSizeInBits() != Val.getBitWidth())
285 NewVal = ConstantInt::get(MF->getFunction()->getContext(),
286 Val.getValue().sextOrTrunc(Ty.getSizeInBits()));
288 return buildInstr(TargetOpcode::G_CONSTANT).addDef(Res).addCImm(NewVal);
291 MachineInstrBuilder MachineIRBuilder::buildConstant(unsigned Res,
293 auto IntN = IntegerType::get(MF->getFunction()->getContext(),
294 MRI->getType(Res).getSizeInBits());
295 ConstantInt *CI = ConstantInt::get(IntN, Val, true);
296 return buildConstant(Res, *CI);
299 MachineInstrBuilder MachineIRBuilder::buildFConstant(unsigned Res,
300 const ConstantFP &Val) {
301 assert(MRI->getType(Res).isScalar() && "invalid operand type");
303 return buildInstr(TargetOpcode::G_FCONSTANT).addDef(Res).addFPImm(&Val);
306 MachineInstrBuilder MachineIRBuilder::buildBrCond(unsigned Tst,
307 MachineBasicBlock &Dest) {
308 assert(MRI->getType(Tst).isScalar() && "invalid operand type");
310 return buildInstr(TargetOpcode::G_BRCOND).addUse(Tst).addMBB(&Dest);
313 MachineInstrBuilder MachineIRBuilder::buildLoad(unsigned Res, unsigned Addr,
314 MachineMemOperand &MMO) {
315 assert(MRI->getType(Res).isValid() && "invalid operand type");
316 assert(MRI->getType(Addr).isPointer() && "invalid operand type");
318 return buildInstr(TargetOpcode::G_LOAD)
321 .addMemOperand(&MMO);
324 MachineInstrBuilder MachineIRBuilder::buildStore(unsigned Val, unsigned Addr,
325 MachineMemOperand &MMO) {
326 assert(MRI->getType(Val).isValid() && "invalid operand type");
327 assert(MRI->getType(Addr).isPointer() && "invalid operand type");
329 return buildInstr(TargetOpcode::G_STORE)
332 .addMemOperand(&MMO);
335 MachineInstrBuilder MachineIRBuilder::buildUAdde(unsigned Res,
337 unsigned Op0, unsigned Op1,
339 assert(MRI->getType(Res).isScalar() && "invalid operand type");
340 assert(MRI->getType(Res) == MRI->getType(Op0) &&
341 MRI->getType(Res) == MRI->getType(Op1) && "type mismatch");
342 assert(MRI->getType(CarryOut).isScalar() && "invalid operand type");
343 assert(MRI->getType(CarryOut) == MRI->getType(CarryIn) && "type mismatch");
345 return buildInstr(TargetOpcode::G_UADDE)
353 MachineInstrBuilder MachineIRBuilder::buildAnyExt(unsigned Res, unsigned Op) {
354 validateTruncExt(Res, Op, true);
355 return buildInstr(TargetOpcode::G_ANYEXT).addDef(Res).addUse(Op);
358 MachineInstrBuilder MachineIRBuilder::buildSExt(unsigned Res, unsigned Op) {
359 validateTruncExt(Res, Op, true);
360 return buildInstr(TargetOpcode::G_SEXT).addDef(Res).addUse(Op);
363 MachineInstrBuilder MachineIRBuilder::buildZExt(unsigned Res, unsigned Op) {
364 validateTruncExt(Res, Op, true);
365 return buildInstr(TargetOpcode::G_ZEXT).addDef(Res).addUse(Op);
368 MachineInstrBuilder MachineIRBuilder::buildSExtOrTrunc(unsigned Res,
370 assert(MRI->getType(Res).isScalar() || MRI->getType(Res).isVector());
371 assert(MRI->getType(Res).isScalar() == MRI->getType(Op).isScalar());
373 unsigned Opcode = TargetOpcode::COPY;
374 if (MRI->getType(Res).getSizeInBits() > MRI->getType(Op).getSizeInBits())
375 Opcode = TargetOpcode::G_SEXT;
376 else if (MRI->getType(Res).getSizeInBits() < MRI->getType(Op).getSizeInBits())
377 Opcode = TargetOpcode::G_TRUNC;
379 assert(MRI->getType(Res) == MRI->getType(Op));
381 return buildInstr(Opcode).addDef(Res).addUse(Op);
384 MachineInstrBuilder MachineIRBuilder::buildZExtOrTrunc(unsigned Res,
386 assert(MRI->getType(Res).isScalar() || MRI->getType(Res).isVector());
387 assert(MRI->getType(Res).isScalar() == MRI->getType(Op).isScalar());
389 unsigned Opcode = TargetOpcode::COPY;
390 if (MRI->getType(Res).getSizeInBits() > MRI->getType(Op).getSizeInBits())
391 Opcode = TargetOpcode::G_ZEXT;
392 else if (MRI->getType(Res).getSizeInBits() < MRI->getType(Op).getSizeInBits())
393 Opcode = TargetOpcode::G_TRUNC;
395 assert(MRI->getType(Res) == MRI->getType(Op));
397 return buildInstr(Opcode).addDef(Res).addUse(Op);
400 MachineInstrBuilder MachineIRBuilder::buildCast(unsigned Dst, unsigned Src) {
401 LLT SrcTy = MRI->getType(Src);
402 LLT DstTy = MRI->getType(Dst);
404 return buildCopy(Dst, Src);
407 if (SrcTy.isPointer() && DstTy.isScalar())
408 Opcode = TargetOpcode::G_PTRTOINT;
409 else if (DstTy.isPointer() && SrcTy.isScalar())
410 Opcode = TargetOpcode::G_INTTOPTR;
412 assert(!SrcTy.isPointer() && !DstTy.isPointer() && "n G_ADDRCAST yet");
413 Opcode = TargetOpcode::G_BITCAST;
416 return buildInstr(Opcode).addDef(Dst).addUse(Src);
419 MachineInstrBuilder MachineIRBuilder::buildExtract(unsigned Res, unsigned Src,
422 assert(MRI->getType(Src).isValid() && "invalid operand type");
423 assert(MRI->getType(Res).isValid() && "invalid operand type");
424 assert(Index + MRI->getType(Res).getSizeInBits() <=
425 MRI->getType(Src).getSizeInBits() &&
426 "extracting off end of register");
429 if (MRI->getType(Res).getSizeInBits() == MRI->getType(Src).getSizeInBits()) {
430 assert(Index == 0 && "insertion past the end of a register");
431 return buildCast(Res, Src);
434 return buildInstr(TargetOpcode::G_EXTRACT)
440 void MachineIRBuilder::buildSequence(unsigned Res, ArrayRef<unsigned> Ops,
441 ArrayRef<uint64_t> Indices) {
443 assert(Ops.size() == Indices.size() && "incompatible args");
444 assert(!Ops.empty() && "invalid trivial sequence");
445 assert(std::is_sorted(Indices.begin(), Indices.end()) &&
446 "sequence offsets must be in ascending order");
448 assert(MRI->getType(Res).isValid() && "invalid operand type");
450 assert(MRI->getType(Op).isValid() && "invalid operand type");
453 LLT ResTy = MRI->getType(Res);
454 LLT OpTy = MRI->getType(Ops[0]);
455 unsigned OpSize = OpTy.getSizeInBits();
456 bool MaybeMerge = true;
457 for (unsigned i = 0; i < Ops.size(); ++i) {
458 if (MRI->getType(Ops[i]) != OpTy || Indices[i] != i * OpSize) {
464 if (MaybeMerge && Ops.size() * OpSize == ResTy.getSizeInBits()) {
465 buildMerge(Res, Ops);
469 unsigned ResIn = MRI->createGenericVirtualRegister(ResTy);
472 for (unsigned i = 0; i < Ops.size(); ++i) {
474 i + 1 == Ops.size() ? Res : MRI->createGenericVirtualRegister(ResTy);
475 buildInsert(ResOut, ResIn, Ops[i], Indices[i]);
480 MachineInstrBuilder MachineIRBuilder::buildUndef(unsigned Res) {
481 return buildInstr(TargetOpcode::G_IMPLICIT_DEF).addDef(Res);
484 MachineInstrBuilder MachineIRBuilder::buildMerge(unsigned Res,
485 ArrayRef<unsigned> Ops) {
488 assert(!Ops.empty() && "invalid trivial sequence");
489 LLT Ty = MRI->getType(Ops[0]);
491 assert(MRI->getType(Reg) == Ty && "type mismatch in input list");
492 assert(Ops.size() * MRI->getType(Ops[0]).getSizeInBits() ==
493 MRI->getType(Res).getSizeInBits() &&
494 "input operands do not cover output register");
498 return buildCast(Res, Ops[0]);
500 MachineInstrBuilder MIB = buildInstr(TargetOpcode::G_MERGE_VALUES);
502 for (unsigned i = 0; i < Ops.size(); ++i)
507 MachineInstrBuilder MachineIRBuilder::buildUnmerge(ArrayRef<unsigned> Res,
511 assert(!Res.empty() && "invalid trivial sequence");
512 LLT Ty = MRI->getType(Res[0]);
514 assert(MRI->getType(Reg) == Ty && "type mismatch in input list");
515 assert(Res.size() * MRI->getType(Res[0]).getSizeInBits() ==
516 MRI->getType(Op).getSizeInBits() &&
517 "input operands do not cover output register");
520 MachineInstrBuilder MIB = buildInstr(TargetOpcode::G_UNMERGE_VALUES);
521 for (unsigned i = 0; i < Res.size(); ++i)
527 MachineInstrBuilder MachineIRBuilder::buildInsert(unsigned Res, unsigned Src,
528 unsigned Op, unsigned Index) {
529 assert(Index + MRI->getType(Op).getSizeInBits() <=
530 MRI->getType(Res).getSizeInBits() &&
531 "insertion past the end of a register");
533 if (MRI->getType(Res).getSizeInBits() == MRI->getType(Op).getSizeInBits()) {
534 return buildCast(Res, Op);
537 return buildInstr(TargetOpcode::G_INSERT)
544 MachineInstrBuilder MachineIRBuilder::buildIntrinsic(Intrinsic::ID ID,
546 bool HasSideEffects) {
548 buildInstr(HasSideEffects ? TargetOpcode::G_INTRINSIC_W_SIDE_EFFECTS
549 : TargetOpcode::G_INTRINSIC);
552 MIB.addIntrinsicID(ID);
556 MachineInstrBuilder MachineIRBuilder::buildTrunc(unsigned Res, unsigned Op) {
557 validateTruncExt(Res, Op, false);
558 return buildInstr(TargetOpcode::G_TRUNC).addDef(Res).addUse(Op);
561 MachineInstrBuilder MachineIRBuilder::buildFPTrunc(unsigned Res, unsigned Op) {
562 validateTruncExt(Res, Op, false);
563 return buildInstr(TargetOpcode::G_FPTRUNC).addDef(Res).addUse(Op);
566 MachineInstrBuilder MachineIRBuilder::buildICmp(CmpInst::Predicate Pred,
567 unsigned Res, unsigned Op0,
570 assert(MRI->getType(Op0) == MRI->getType(Op0) && "type mismatch");
571 assert(CmpInst::isIntPredicate(Pred) && "invalid predicate");
572 if (MRI->getType(Op0).isScalar() || MRI->getType(Op0).isPointer())
573 assert(MRI->getType(Res).isScalar() && "type mismatch");
575 assert(MRI->getType(Res).isVector() &&
576 MRI->getType(Res).getNumElements() ==
577 MRI->getType(Op0).getNumElements() &&
581 return buildInstr(TargetOpcode::G_ICMP)
588 MachineInstrBuilder MachineIRBuilder::buildFCmp(CmpInst::Predicate Pred,
589 unsigned Res, unsigned Op0,
592 assert((MRI->getType(Op0).isScalar() || MRI->getType(Op0).isVector()) &&
593 "invalid operand type");
594 assert(MRI->getType(Op0) == MRI->getType(Op1) && "type mismatch");
595 assert(CmpInst::isFPPredicate(Pred) && "invalid predicate");
596 if (MRI->getType(Op0).isScalar())
597 assert(MRI->getType(Res).isScalar() && "type mismatch");
599 assert(MRI->getType(Res).isVector() &&
600 MRI->getType(Res).getNumElements() ==
601 MRI->getType(Op0).getNumElements() &&
605 return buildInstr(TargetOpcode::G_FCMP)
612 MachineInstrBuilder MachineIRBuilder::buildSelect(unsigned Res, unsigned Tst,
613 unsigned Op0, unsigned Op1) {
615 LLT ResTy = MRI->getType(Res);
616 assert((ResTy.isScalar() || ResTy.isVector() || ResTy.isPointer()) &&
617 "invalid operand type");
618 assert(ResTy == MRI->getType(Op0) && ResTy == MRI->getType(Op1) &&
620 if (ResTy.isScalar() || ResTy.isPointer())
621 assert(MRI->getType(Tst).isScalar() && "type mismatch");
623 assert((MRI->getType(Tst).isScalar() ||
624 (MRI->getType(Tst).isVector() &&
625 MRI->getType(Tst).getNumElements() ==
626 MRI->getType(Op0).getNumElements())) &&
630 return buildInstr(TargetOpcode::G_SELECT)
637 MachineInstrBuilder MachineIRBuilder::buildInsertVectorElement(unsigned Res,
642 LLT ResTy = MRI->getType(Res);
643 LLT ValTy = MRI->getType(Val);
644 LLT EltTy = MRI->getType(Elt);
645 LLT IdxTy = MRI->getType(Idx);
646 assert(ResTy.isVector() && ValTy.isVector() && "invalid operand type");
647 assert(IdxTy.isScalar() && "invalid operand type");
648 assert(ResTy.getNumElements() == ValTy.getNumElements() && "type mismatch");
649 assert(ResTy.getElementType() == EltTy && "type mismatch");
652 return buildInstr(TargetOpcode::G_INSERT_VECTOR_ELT)
659 MachineInstrBuilder MachineIRBuilder::buildExtractVectorElement(unsigned Res,
663 LLT ResTy = MRI->getType(Res);
664 LLT ValTy = MRI->getType(Val);
665 LLT IdxTy = MRI->getType(Idx);
666 assert(ValTy.isVector() && "invalid operand type");
667 assert((ResTy.isScalar() || ResTy.isPointer()) && "invalid operand type");
668 assert(IdxTy.isScalar() && "invalid operand type");
669 assert(ValTy.getElementType() == ResTy && "type mismatch");
672 return buildInstr(TargetOpcode::G_EXTRACT_VECTOR_ELT)
678 void MachineIRBuilder::validateTruncExt(unsigned Dst, unsigned Src,
681 LLT SrcTy = MRI->getType(Src);
682 LLT DstTy = MRI->getType(Dst);
684 if (DstTy.isVector()) {
685 assert(SrcTy.isVector() && "mismatched cast between vecot and non-vector");
686 assert(SrcTy.getNumElements() == DstTy.getNumElements() &&
687 "different number of elements in a trunc/ext");
689 assert(DstTy.isScalar() && SrcTy.isScalar() && "invalid extend/trunc");
692 assert(DstTy.getSizeInBits() > SrcTy.getSizeInBits() &&
693 "invalid narrowing extend");
695 assert(DstTy.getSizeInBits() < SrcTy.getSizeInBits() &&
696 "invalid widening trunc");