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::buildBinaryOp(unsigned Opcode, 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(Opcode)
182 MachineInstrBuilder MachineIRBuilder::buildAdd(unsigned Res, unsigned Op0,
184 return buildBinaryOp(TargetOpcode::G_ADD, Res, Op0, Op1);
187 MachineInstrBuilder MachineIRBuilder::buildGEP(unsigned Res, unsigned Op0,
189 assert(MRI->getType(Res).isPointer() &&
190 MRI->getType(Res) == MRI->getType(Op0) && "type mismatch");
191 assert(MRI->getType(Op1).isScalar() && "invalid offset type");
193 return buildInstr(TargetOpcode::G_GEP)
199 Optional<MachineInstrBuilder>
200 MachineIRBuilder::materializeGEP(unsigned &Res, unsigned Op0,
201 const LLT &ValueTy, uint64_t Value) {
202 assert(Res == 0 && "Res is a result argument");
203 assert(ValueTy.isScalar() && "invalid offset type");
210 Res = MRI->createGenericVirtualRegister(MRI->getType(Op0));
211 unsigned TmpReg = MRI->createGenericVirtualRegister(ValueTy);
213 buildConstant(TmpReg, Value);
214 return buildGEP(Res, Op0, TmpReg);
217 MachineInstrBuilder MachineIRBuilder::buildPtrMask(unsigned Res, unsigned Op0,
219 assert(MRI->getType(Res).isPointer() &&
220 MRI->getType(Res) == MRI->getType(Op0) && "type mismatch");
222 return buildInstr(TargetOpcode::G_PTR_MASK)
228 MachineInstrBuilder MachineIRBuilder::buildSub(unsigned Res, unsigned Op0,
230 return buildBinaryOp(TargetOpcode::G_SUB, Res, Op0, Op1);
233 MachineInstrBuilder MachineIRBuilder::buildMul(unsigned Res, unsigned Op0,
235 return buildBinaryOp(TargetOpcode::G_MUL, Res, Op0, Op1);
238 MachineInstrBuilder MachineIRBuilder::buildAnd(unsigned Res, unsigned Op0,
240 return buildBinaryOp(TargetOpcode::G_AND, Res, Op0, Op1);
243 MachineInstrBuilder MachineIRBuilder::buildOr(unsigned Res, unsigned Op0,
245 return buildBinaryOp(TargetOpcode::G_OR, Res, Op0, Op1);
248 MachineInstrBuilder MachineIRBuilder::buildBr(MachineBasicBlock &Dest) {
249 return buildInstr(TargetOpcode::G_BR).addMBB(&Dest);
252 MachineInstrBuilder MachineIRBuilder::buildBrIndirect(unsigned Tgt) {
253 assert(MRI->getType(Tgt).isPointer() && "invalid branch destination");
254 return buildInstr(TargetOpcode::G_BRINDIRECT).addUse(Tgt);
257 MachineInstrBuilder MachineIRBuilder::buildCopy(unsigned Res, unsigned Op) {
258 assert(MRI->getType(Res) == LLT() || MRI->getType(Op) == LLT() ||
259 MRI->getType(Res) == MRI->getType(Op));
260 return buildInstr(TargetOpcode::COPY).addDef(Res).addUse(Op);
263 MachineInstrBuilder MachineIRBuilder::buildConstant(unsigned Res,
264 const ConstantInt &Val) {
265 LLT Ty = MRI->getType(Res);
267 assert((Ty.isScalar() || Ty.isPointer()) && "invalid operand type");
269 const ConstantInt *NewVal = &Val;
270 if (Ty.getSizeInBits() != Val.getBitWidth())
271 NewVal = ConstantInt::get(MF->getFunction()->getContext(),
272 Val.getValue().sextOrTrunc(Ty.getSizeInBits()));
274 return buildInstr(TargetOpcode::G_CONSTANT).addDef(Res).addCImm(NewVal);
277 MachineInstrBuilder MachineIRBuilder::buildConstant(unsigned Res,
279 auto IntN = IntegerType::get(MF->getFunction()->getContext(),
280 MRI->getType(Res).getSizeInBits());
281 ConstantInt *CI = ConstantInt::get(IntN, Val, true);
282 return buildConstant(Res, *CI);
285 MachineInstrBuilder MachineIRBuilder::buildFConstant(unsigned Res,
286 const ConstantFP &Val) {
287 assert(MRI->getType(Res).isScalar() && "invalid operand type");
289 return buildInstr(TargetOpcode::G_FCONSTANT).addDef(Res).addFPImm(&Val);
292 MachineInstrBuilder MachineIRBuilder::buildBrCond(unsigned Tst,
293 MachineBasicBlock &Dest) {
294 assert(MRI->getType(Tst).isScalar() && "invalid operand type");
296 return buildInstr(TargetOpcode::G_BRCOND).addUse(Tst).addMBB(&Dest);
299 MachineInstrBuilder MachineIRBuilder::buildLoad(unsigned Res, unsigned Addr,
300 MachineMemOperand &MMO) {
301 assert(MRI->getType(Res).isValid() && "invalid operand type");
302 assert(MRI->getType(Addr).isPointer() && "invalid operand type");
304 return buildInstr(TargetOpcode::G_LOAD)
307 .addMemOperand(&MMO);
310 MachineInstrBuilder MachineIRBuilder::buildStore(unsigned Val, unsigned Addr,
311 MachineMemOperand &MMO) {
312 assert(MRI->getType(Val).isValid() && "invalid operand type");
313 assert(MRI->getType(Addr).isPointer() && "invalid operand type");
315 return buildInstr(TargetOpcode::G_STORE)
318 .addMemOperand(&MMO);
321 MachineInstrBuilder MachineIRBuilder::buildUAdde(unsigned Res,
323 unsigned Op0, unsigned Op1,
325 assert(MRI->getType(Res).isScalar() && "invalid operand type");
326 assert(MRI->getType(Res) == MRI->getType(Op0) &&
327 MRI->getType(Res) == MRI->getType(Op1) && "type mismatch");
328 assert(MRI->getType(CarryOut).isScalar() && "invalid operand type");
329 assert(MRI->getType(CarryOut) == MRI->getType(CarryIn) && "type mismatch");
331 return buildInstr(TargetOpcode::G_UADDE)
339 MachineInstrBuilder MachineIRBuilder::buildAnyExt(unsigned Res, unsigned Op) {
340 validateTruncExt(Res, Op, true);
341 return buildInstr(TargetOpcode::G_ANYEXT).addDef(Res).addUse(Op);
344 MachineInstrBuilder MachineIRBuilder::buildSExt(unsigned Res, unsigned Op) {
345 validateTruncExt(Res, Op, true);
346 return buildInstr(TargetOpcode::G_SEXT).addDef(Res).addUse(Op);
349 MachineInstrBuilder MachineIRBuilder::buildZExt(unsigned Res, unsigned Op) {
350 validateTruncExt(Res, Op, true);
351 return buildInstr(TargetOpcode::G_ZEXT).addDef(Res).addUse(Op);
354 MachineInstrBuilder MachineIRBuilder::buildSExtOrTrunc(unsigned Res,
356 assert(MRI->getType(Res).isScalar() || MRI->getType(Res).isVector());
357 assert(MRI->getType(Res).isScalar() == MRI->getType(Op).isScalar());
359 unsigned Opcode = TargetOpcode::COPY;
360 if (MRI->getType(Res).getSizeInBits() > MRI->getType(Op).getSizeInBits())
361 Opcode = TargetOpcode::G_SEXT;
362 else if (MRI->getType(Res).getSizeInBits() < MRI->getType(Op).getSizeInBits())
363 Opcode = TargetOpcode::G_TRUNC;
365 assert(MRI->getType(Res) == MRI->getType(Op));
367 return buildInstr(Opcode).addDef(Res).addUse(Op);
370 MachineInstrBuilder MachineIRBuilder::buildZExtOrTrunc(unsigned Res,
372 assert(MRI->getType(Res).isScalar() || MRI->getType(Res).isVector());
373 assert(MRI->getType(Res).isScalar() == MRI->getType(Op).isScalar());
375 unsigned Opcode = TargetOpcode::COPY;
376 if (MRI->getType(Res).getSizeInBits() > MRI->getType(Op).getSizeInBits())
377 Opcode = TargetOpcode::G_ZEXT;
378 else if (MRI->getType(Res).getSizeInBits() < MRI->getType(Op).getSizeInBits())
379 Opcode = TargetOpcode::G_TRUNC;
381 assert(MRI->getType(Res) == MRI->getType(Op));
383 return buildInstr(Opcode).addDef(Res).addUse(Op);
386 MachineInstrBuilder MachineIRBuilder::buildCast(unsigned Dst, unsigned Src) {
387 LLT SrcTy = MRI->getType(Src);
388 LLT DstTy = MRI->getType(Dst);
390 return buildCopy(Dst, Src);
393 if (SrcTy.isPointer() && DstTy.isScalar())
394 Opcode = TargetOpcode::G_PTRTOINT;
395 else if (DstTy.isPointer() && SrcTy.isScalar())
396 Opcode = TargetOpcode::G_INTTOPTR;
398 assert(!SrcTy.isPointer() && !DstTy.isPointer() && "n G_ADDRCAST yet");
399 Opcode = TargetOpcode::G_BITCAST;
402 return buildInstr(Opcode).addDef(Dst).addUse(Src);
405 MachineInstrBuilder MachineIRBuilder::buildExtract(unsigned Res, unsigned Src,
408 assert(MRI->getType(Src).isValid() && "invalid operand type");
409 assert(MRI->getType(Res).isValid() && "invalid operand type");
410 assert(Index + MRI->getType(Res).getSizeInBits() <=
411 MRI->getType(Src).getSizeInBits() &&
412 "extracting off end of register");
415 if (MRI->getType(Res).getSizeInBits() == MRI->getType(Src).getSizeInBits()) {
416 assert(Index == 0 && "insertion past the end of a register");
417 return buildCast(Res, Src);
420 return buildInstr(TargetOpcode::G_EXTRACT)
426 void MachineIRBuilder::buildSequence(unsigned Res, ArrayRef<unsigned> Ops,
427 ArrayRef<uint64_t> Indices) {
429 assert(Ops.size() == Indices.size() && "incompatible args");
430 assert(!Ops.empty() && "invalid trivial sequence");
431 assert(std::is_sorted(Indices.begin(), Indices.end()) &&
432 "sequence offsets must be in ascending order");
434 assert(MRI->getType(Res).isValid() && "invalid operand type");
436 assert(MRI->getType(Op).isValid() && "invalid operand type");
439 LLT ResTy = MRI->getType(Res);
440 LLT OpTy = MRI->getType(Ops[0]);
441 unsigned OpSize = OpTy.getSizeInBits();
442 bool MaybeMerge = true;
443 for (unsigned i = 0; i < Ops.size(); ++i) {
444 if (MRI->getType(Ops[i]) != OpTy || Indices[i] != i * OpSize) {
450 if (MaybeMerge && Ops.size() * OpSize == ResTy.getSizeInBits()) {
451 buildMerge(Res, Ops);
455 unsigned ResIn = MRI->createGenericVirtualRegister(ResTy);
458 for (unsigned i = 0; i < Ops.size(); ++i) {
460 i + 1 == Ops.size() ? Res : MRI->createGenericVirtualRegister(ResTy);
461 buildInsert(ResOut, ResIn, Ops[i], Indices[i]);
466 MachineInstrBuilder MachineIRBuilder::buildUndef(unsigned Res) {
467 return buildInstr(TargetOpcode::G_IMPLICIT_DEF).addDef(Res);
470 MachineInstrBuilder MachineIRBuilder::buildMerge(unsigned Res,
471 ArrayRef<unsigned> Ops) {
474 assert(!Ops.empty() && "invalid trivial sequence");
475 LLT Ty = MRI->getType(Ops[0]);
477 assert(MRI->getType(Reg) == Ty && "type mismatch in input list");
478 assert(Ops.size() * MRI->getType(Ops[0]).getSizeInBits() ==
479 MRI->getType(Res).getSizeInBits() &&
480 "input operands do not cover output register");
484 return buildCast(Res, Ops[0]);
486 MachineInstrBuilder MIB = buildInstr(TargetOpcode::G_MERGE_VALUES);
488 for (unsigned i = 0; i < Ops.size(); ++i)
493 MachineInstrBuilder MachineIRBuilder::buildUnmerge(ArrayRef<unsigned> Res,
497 assert(!Res.empty() && "invalid trivial sequence");
498 LLT Ty = MRI->getType(Res[0]);
500 assert(MRI->getType(Reg) == Ty && "type mismatch in input list");
501 assert(Res.size() * MRI->getType(Res[0]).getSizeInBits() ==
502 MRI->getType(Op).getSizeInBits() &&
503 "input operands do not cover output register");
506 MachineInstrBuilder MIB = buildInstr(TargetOpcode::G_UNMERGE_VALUES);
507 for (unsigned i = 0; i < Res.size(); ++i)
513 MachineInstrBuilder MachineIRBuilder::buildInsert(unsigned Res, unsigned Src,
514 unsigned Op, unsigned Index) {
515 assert(Index + MRI->getType(Op).getSizeInBits() <=
516 MRI->getType(Res).getSizeInBits() &&
517 "insertion past the end of a register");
519 if (MRI->getType(Res).getSizeInBits() == MRI->getType(Op).getSizeInBits()) {
520 return buildCast(Res, Op);
523 return buildInstr(TargetOpcode::G_INSERT)
530 MachineInstrBuilder MachineIRBuilder::buildIntrinsic(Intrinsic::ID ID,
532 bool HasSideEffects) {
534 buildInstr(HasSideEffects ? TargetOpcode::G_INTRINSIC_W_SIDE_EFFECTS
535 : TargetOpcode::G_INTRINSIC);
538 MIB.addIntrinsicID(ID);
542 MachineInstrBuilder MachineIRBuilder::buildTrunc(unsigned Res, unsigned Op) {
543 validateTruncExt(Res, Op, false);
544 return buildInstr(TargetOpcode::G_TRUNC).addDef(Res).addUse(Op);
547 MachineInstrBuilder MachineIRBuilder::buildFPTrunc(unsigned Res, unsigned Op) {
548 validateTruncExt(Res, Op, false);
549 return buildInstr(TargetOpcode::G_FPTRUNC).addDef(Res).addUse(Op);
552 MachineInstrBuilder MachineIRBuilder::buildICmp(CmpInst::Predicate Pred,
553 unsigned Res, unsigned Op0,
556 assert(MRI->getType(Op0) == MRI->getType(Op0) && "type mismatch");
557 assert(CmpInst::isIntPredicate(Pred) && "invalid predicate");
558 if (MRI->getType(Op0).isScalar() || MRI->getType(Op0).isPointer())
559 assert(MRI->getType(Res).isScalar() && "type mismatch");
561 assert(MRI->getType(Res).isVector() &&
562 MRI->getType(Res).getNumElements() ==
563 MRI->getType(Op0).getNumElements() &&
567 return buildInstr(TargetOpcode::G_ICMP)
574 MachineInstrBuilder MachineIRBuilder::buildFCmp(CmpInst::Predicate Pred,
575 unsigned Res, unsigned Op0,
578 assert((MRI->getType(Op0).isScalar() || MRI->getType(Op0).isVector()) &&
579 "invalid operand type");
580 assert(MRI->getType(Op0) == MRI->getType(Op1) && "type mismatch");
581 assert(CmpInst::isFPPredicate(Pred) && "invalid predicate");
582 if (MRI->getType(Op0).isScalar())
583 assert(MRI->getType(Res).isScalar() && "type mismatch");
585 assert(MRI->getType(Res).isVector() &&
586 MRI->getType(Res).getNumElements() ==
587 MRI->getType(Op0).getNumElements() &&
591 return buildInstr(TargetOpcode::G_FCMP)
598 MachineInstrBuilder MachineIRBuilder::buildSelect(unsigned Res, unsigned Tst,
599 unsigned Op0, unsigned Op1) {
601 LLT ResTy = MRI->getType(Res);
602 assert((ResTy.isScalar() || ResTy.isVector() || ResTy.isPointer()) &&
603 "invalid operand type");
604 assert(ResTy == MRI->getType(Op0) && ResTy == MRI->getType(Op1) &&
606 if (ResTy.isScalar() || ResTy.isPointer())
607 assert(MRI->getType(Tst).isScalar() && "type mismatch");
609 assert((MRI->getType(Tst).isScalar() ||
610 (MRI->getType(Tst).isVector() &&
611 MRI->getType(Tst).getNumElements() ==
612 MRI->getType(Op0).getNumElements())) &&
616 return buildInstr(TargetOpcode::G_SELECT)
623 MachineInstrBuilder MachineIRBuilder::buildInsertVectorElement(unsigned Res,
628 LLT ResTy = MRI->getType(Res);
629 LLT ValTy = MRI->getType(Val);
630 LLT EltTy = MRI->getType(Elt);
631 LLT IdxTy = MRI->getType(Idx);
632 assert(ResTy.isVector() && ValTy.isVector() && "invalid operand type");
633 assert(IdxTy.isScalar() && "invalid operand type");
634 assert(ResTy.getNumElements() == ValTy.getNumElements() && "type mismatch");
635 assert(ResTy.getElementType() == EltTy && "type mismatch");
638 return buildInstr(TargetOpcode::G_INSERT_VECTOR_ELT)
645 MachineInstrBuilder MachineIRBuilder::buildExtractVectorElement(unsigned Res,
649 LLT ResTy = MRI->getType(Res);
650 LLT ValTy = MRI->getType(Val);
651 LLT IdxTy = MRI->getType(Idx);
652 assert(ValTy.isVector() && "invalid operand type");
653 assert((ResTy.isScalar() || ResTy.isPointer()) && "invalid operand type");
654 assert(IdxTy.isScalar() && "invalid operand type");
655 assert(ValTy.getElementType() == ResTy && "type mismatch");
658 return buildInstr(TargetOpcode::G_EXTRACT_VECTOR_ELT)
664 void MachineIRBuilder::validateTruncExt(unsigned Dst, unsigned Src,
667 LLT SrcTy = MRI->getType(Src);
668 LLT DstTy = MRI->getType(Dst);
670 if (DstTy.isVector()) {
671 assert(SrcTy.isVector() && "mismatched cast between vecot and non-vector");
672 assert(SrcTy.getNumElements() == DstTy.getNumElements() &&
673 "different number of elements in a trunc/ext");
675 assert(DstTy.isScalar() && SrcTy.isScalar() && "invalid extend/trunc");
678 assert(DstTy.getSizeInBits() > SrcTy.getSizeInBits() &&
679 "invalid narrowing extend");
681 assert(DstTy.getSizeInBits() < SrcTy.getSizeInBits() &&
682 "invalid widening trunc");