1 //===-- llvm/CodeGen/GlobalISel/MachineIRBuilder.cpp - MIBuilder--*- C++ -*-==//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 /// \file
9 /// This file implements the MachineIRBuidler class.
10 //===----------------------------------------------------------------------===//
11 #include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
12 #include "llvm/CodeGen/GlobalISel/GISelChangeObserver.h"
13 
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/CodeGen/TargetInstrInfo.h"
19 #include "llvm/CodeGen/TargetLowering.h"
20 #include "llvm/CodeGen/TargetOpcodes.h"
21 #include "llvm/CodeGen/TargetSubtargetInfo.h"
22 #include "llvm/IR/DebugInfo.h"
23 
24 using namespace llvm;
25 
26 void MachineIRBuilder::setMF(MachineFunction &MF) {
27   State.MF = &MF;
28   State.MBB = nullptr;
29   State.MRI = &MF.getRegInfo();
30   State.TII = MF.getSubtarget().getInstrInfo();
31   State.DL = DebugLoc();
32   State.II = MachineBasicBlock::iterator();
33   State.Observer = nullptr;
34 }
35 
36 void MachineIRBuilder::setMBB(MachineBasicBlock &MBB) {
37   State.MBB = &MBB;
38   State.II = MBB.end();
39   assert(&getMF() == MBB.getParent() &&
40          "Basic block is in a different function");
41 }
42 
43 void MachineIRBuilder::setInstr(MachineInstr &MI) {
44   assert(MI.getParent() && "Instruction is not part of a basic block");
45   setMBB(*MI.getParent());
46   State.II = MI.getIterator();
47 }
48 
49 void MachineIRBuilder::setCSEInfo(GISelCSEInfo *Info) { State.CSEInfo = Info; }
50 
51 void MachineIRBuilder::setInsertPt(MachineBasicBlock &MBB,
52                                    MachineBasicBlock::iterator II) {
53   assert(MBB.getParent() == &getMF() &&
54          "Basic block is in a different function");
55   State.MBB = &MBB;
56   State.II = II;
57 }
58 
59 void MachineIRBuilder::recordInsertion(MachineInstr *InsertedInstr) const {
60   if (State.Observer)
61     State.Observer->createdInstr(*InsertedInstr);
62 }
63 
64 void MachineIRBuilder::setChangeObserver(GISelChangeObserver &Observer) {
65   State.Observer = &Observer;
66 }
67 
68 void MachineIRBuilder::stopObservingChanges() { State.Observer = nullptr; }
69 
70 //------------------------------------------------------------------------------
71 // Build instruction variants.
72 //------------------------------------------------------------------------------
73 
74 MachineInstrBuilder MachineIRBuilder::buildInstr(unsigned Opcode) {
75   return insertInstr(buildInstrNoInsert(Opcode));
76 }
77 
78 MachineInstrBuilder MachineIRBuilder::buildInstrNoInsert(unsigned Opcode) {
79   MachineInstrBuilder MIB = BuildMI(getMF(), getDL(), getTII().get(Opcode));
80   return MIB;
81 }
82 
83 MachineInstrBuilder MachineIRBuilder::insertInstr(MachineInstrBuilder MIB) {
84   getMBB().insert(getInsertPt(), MIB);
85   recordInsertion(MIB);
86   return MIB;
87 }
88 
89 MachineInstrBuilder
90 MachineIRBuilder::buildDirectDbgValue(Register Reg, const MDNode *Variable,
91                                       const MDNode *Expr) {
92   assert(isa<DILocalVariable>(Variable) && "not a variable");
93   assert(cast<DIExpression>(Expr)->isValid() && "not an expression");
94   assert(
95       cast<DILocalVariable>(Variable)->isValidLocationForIntrinsic(getDL()) &&
96       "Expected inlined-at fields to agree");
97   return insertInstr(BuildMI(getMF(), getDL(),
98                              getTII().get(TargetOpcode::DBG_VALUE),
99                              /*IsIndirect*/ false, Reg, Variable, Expr));
100 }
101 
102 MachineInstrBuilder
103 MachineIRBuilder::buildIndirectDbgValue(Register Reg, const MDNode *Variable,
104                                         const MDNode *Expr) {
105   assert(isa<DILocalVariable>(Variable) && "not a variable");
106   assert(cast<DIExpression>(Expr)->isValid() && "not an expression");
107   assert(
108       cast<DILocalVariable>(Variable)->isValidLocationForIntrinsic(getDL()) &&
109       "Expected inlined-at fields to agree");
110   return insertInstr(BuildMI(getMF(), getDL(),
111                              getTII().get(TargetOpcode::DBG_VALUE),
112                              /*IsIndirect*/ true, Reg, Variable, Expr));
113 }
114 
115 MachineInstrBuilder MachineIRBuilder::buildFIDbgValue(int FI,
116                                                       const MDNode *Variable,
117                                                       const MDNode *Expr) {
118   assert(isa<DILocalVariable>(Variable) && "not a variable");
119   assert(cast<DIExpression>(Expr)->isValid() && "not an expression");
120   assert(
121       cast<DILocalVariable>(Variable)->isValidLocationForIntrinsic(getDL()) &&
122       "Expected inlined-at fields to agree");
123   return buildInstr(TargetOpcode::DBG_VALUE)
124       .addFrameIndex(FI)
125       .addImm(0)
126       .addMetadata(Variable)
127       .addMetadata(Expr);
128 }
129 
130 MachineInstrBuilder MachineIRBuilder::buildConstDbgValue(const Constant &C,
131                                                          const MDNode *Variable,
132                                                          const MDNode *Expr) {
133   assert(isa<DILocalVariable>(Variable) && "not a variable");
134   assert(cast<DIExpression>(Expr)->isValid() && "not an expression");
135   assert(
136       cast<DILocalVariable>(Variable)->isValidLocationForIntrinsic(getDL()) &&
137       "Expected inlined-at fields to agree");
138   auto MIB = buildInstr(TargetOpcode::DBG_VALUE);
139   if (auto *CI = dyn_cast<ConstantInt>(&C)) {
140     if (CI->getBitWidth() > 64)
141       MIB.addCImm(CI);
142     else
143       MIB.addImm(CI->getZExtValue());
144   } else if (auto *CFP = dyn_cast<ConstantFP>(&C)) {
145     MIB.addFPImm(CFP);
146   } else {
147     // Insert %noreg if we didn't find a usable constant and had to drop it.
148     MIB.addReg(0U);
149   }
150 
151   return MIB.addImm(0).addMetadata(Variable).addMetadata(Expr);
152 }
153 
154 MachineInstrBuilder MachineIRBuilder::buildDbgLabel(const MDNode *Label) {
155   assert(isa<DILabel>(Label) && "not a label");
156   assert(cast<DILabel>(Label)->isValidLocationForIntrinsic(State.DL) &&
157          "Expected inlined-at fields to agree");
158   auto MIB = buildInstr(TargetOpcode::DBG_LABEL);
159 
160   return MIB.addMetadata(Label);
161 }
162 
163 MachineInstrBuilder MachineIRBuilder::buildDynStackAlloc(const DstOp &Res,
164                                                          const SrcOp &Size,
165                                                          unsigned Align) {
166   assert(Res.getLLTTy(*getMRI()).isPointer() && "expected ptr dst type");
167   auto MIB = buildInstr(TargetOpcode::G_DYN_STACKALLOC);
168   Res.addDefToMIB(*getMRI(), MIB);
169   Size.addSrcToMIB(MIB);
170   MIB.addImm(Align);
171   return MIB;
172 }
173 
174 MachineInstrBuilder MachineIRBuilder::buildFrameIndex(const DstOp &Res,
175                                                       int Idx) {
176   assert(Res.getLLTTy(*getMRI()).isPointer() && "invalid operand type");
177   auto MIB = buildInstr(TargetOpcode::G_FRAME_INDEX);
178   Res.addDefToMIB(*getMRI(), MIB);
179   MIB.addFrameIndex(Idx);
180   return MIB;
181 }
182 
183 MachineInstrBuilder MachineIRBuilder::buildGlobalValue(const DstOp &Res,
184                                                        const GlobalValue *GV) {
185   assert(Res.getLLTTy(*getMRI()).isPointer() && "invalid operand type");
186   assert(Res.getLLTTy(*getMRI()).getAddressSpace() ==
187              GV->getType()->getAddressSpace() &&
188          "address space mismatch");
189 
190   auto MIB = buildInstr(TargetOpcode::G_GLOBAL_VALUE);
191   Res.addDefToMIB(*getMRI(), MIB);
192   MIB.addGlobalAddress(GV);
193   return MIB;
194 }
195 
196 MachineInstrBuilder MachineIRBuilder::buildJumpTable(const LLT PtrTy,
197                                                      unsigned JTI) {
198   return buildInstr(TargetOpcode::G_JUMP_TABLE, {PtrTy}, {})
199       .addJumpTableIndex(JTI);
200 }
201 
202 void MachineIRBuilder::validateBinaryOp(const LLT &Res, const LLT &Op0,
203                                         const LLT &Op1) {
204   assert((Res.isScalar() || Res.isVector()) && "invalid operand type");
205   assert((Res == Op0 && Res == Op1) && "type mismatch");
206 }
207 
208 void MachineIRBuilder::validateShiftOp(const LLT &Res, const LLT &Op0,
209                                        const LLT &Op1) {
210   assert((Res.isScalar() || Res.isVector()) && "invalid operand type");
211   assert((Res == Op0) && "type mismatch");
212 }
213 
214 MachineInstrBuilder MachineIRBuilder::buildPtrAdd(const DstOp &Res,
215                                                   const SrcOp &Op0,
216                                                   const SrcOp &Op1) {
217   assert(Res.getLLTTy(*getMRI()).getScalarType().isPointer() &&
218          Res.getLLTTy(*getMRI()) == Op0.getLLTTy(*getMRI()) && "type mismatch");
219   assert(Op1.getLLTTy(*getMRI()).getScalarType().isScalar() && "invalid offset type");
220 
221   return buildInstr(TargetOpcode::G_PTR_ADD, {Res}, {Op0, Op1});
222 }
223 
224 Optional<MachineInstrBuilder>
225 MachineIRBuilder::materializePtrAdd(Register &Res, Register Op0,
226                                     const LLT &ValueTy, uint64_t Value) {
227   assert(Res == 0 && "Res is a result argument");
228   assert(ValueTy.isScalar()  && "invalid offset type");
229 
230   if (Value == 0) {
231     Res = Op0;
232     return None;
233   }
234 
235   Res = getMRI()->createGenericVirtualRegister(getMRI()->getType(Op0));
236   auto Cst = buildConstant(ValueTy, Value);
237   return buildPtrAdd(Res, Op0, Cst.getReg(0));
238 }
239 
240 MachineInstrBuilder MachineIRBuilder::buildPtrMask(const DstOp &Res,
241                                                    const SrcOp &Op0,
242                                                    uint32_t NumBits) {
243   assert(Res.getLLTTy(*getMRI()).isPointer() &&
244          Res.getLLTTy(*getMRI()) == Op0.getLLTTy(*getMRI()) && "type mismatch");
245 
246   auto MIB = buildInstr(TargetOpcode::G_PTR_MASK);
247   Res.addDefToMIB(*getMRI(), MIB);
248   Op0.addSrcToMIB(MIB);
249   MIB.addImm(NumBits);
250   return MIB;
251 }
252 
253 MachineInstrBuilder MachineIRBuilder::buildBr(MachineBasicBlock &Dest) {
254   return buildInstr(TargetOpcode::G_BR).addMBB(&Dest);
255 }
256 
257 MachineInstrBuilder MachineIRBuilder::buildBrIndirect(Register Tgt) {
258   assert(getMRI()->getType(Tgt).isPointer() && "invalid branch destination");
259   return buildInstr(TargetOpcode::G_BRINDIRECT).addUse(Tgt);
260 }
261 
262 MachineInstrBuilder MachineIRBuilder::buildBrJT(Register TablePtr,
263                                                 unsigned JTI,
264                                                 Register IndexReg) {
265   assert(getMRI()->getType(TablePtr).isPointer() &&
266          "Table reg must be a pointer");
267   return buildInstr(TargetOpcode::G_BRJT)
268       .addUse(TablePtr)
269       .addJumpTableIndex(JTI)
270       .addUse(IndexReg);
271 }
272 
273 MachineInstrBuilder MachineIRBuilder::buildCopy(const DstOp &Res,
274                                                 const SrcOp &Op) {
275   return buildInstr(TargetOpcode::COPY, Res, Op);
276 }
277 
278 MachineInstrBuilder MachineIRBuilder::buildConstant(const DstOp &Res,
279                                                     const ConstantInt &Val) {
280   LLT Ty = Res.getLLTTy(*getMRI());
281   LLT EltTy = Ty.getScalarType();
282   assert(EltTy.getScalarSizeInBits() == Val.getBitWidth() &&
283          "creating constant with the wrong size");
284 
285   if (Ty.isVector()) {
286     auto Const = buildInstr(TargetOpcode::G_CONSTANT)
287     .addDef(getMRI()->createGenericVirtualRegister(EltTy))
288     .addCImm(&Val);
289     return buildSplatVector(Res, Const);
290   }
291 
292   auto Const = buildInstr(TargetOpcode::G_CONSTANT);
293   Res.addDefToMIB(*getMRI(), Const);
294   Const.addCImm(&Val);
295   return Const;
296 }
297 
298 MachineInstrBuilder MachineIRBuilder::buildConstant(const DstOp &Res,
299                                                     int64_t Val) {
300   auto IntN = IntegerType::get(getMF().getFunction().getContext(),
301                                Res.getLLTTy(*getMRI()).getScalarSizeInBits());
302   ConstantInt *CI = ConstantInt::get(IntN, Val, true);
303   return buildConstant(Res, *CI);
304 }
305 
306 MachineInstrBuilder MachineIRBuilder::buildFConstant(const DstOp &Res,
307                                                      const ConstantFP &Val) {
308   LLT Ty = Res.getLLTTy(*getMRI());
309   LLT EltTy = Ty.getScalarType();
310 
311   assert(APFloat::getSizeInBits(Val.getValueAPF().getSemantics())
312          == EltTy.getSizeInBits() &&
313          "creating fconstant with the wrong size");
314 
315   assert(!Ty.isPointer() && "invalid operand type");
316 
317   if (Ty.isVector()) {
318     auto Const = buildInstr(TargetOpcode::G_FCONSTANT)
319     .addDef(getMRI()->createGenericVirtualRegister(EltTy))
320     .addFPImm(&Val);
321 
322     return buildSplatVector(Res, Const);
323   }
324 
325   auto Const = buildInstr(TargetOpcode::G_FCONSTANT);
326   Res.addDefToMIB(*getMRI(), Const);
327   Const.addFPImm(&Val);
328   return Const;
329 }
330 
331 MachineInstrBuilder MachineIRBuilder::buildConstant(const DstOp &Res,
332                                                     const APInt &Val) {
333   ConstantInt *CI = ConstantInt::get(getMF().getFunction().getContext(), Val);
334   return buildConstant(Res, *CI);
335 }
336 
337 MachineInstrBuilder MachineIRBuilder::buildFConstant(const DstOp &Res,
338                                                      double Val) {
339   LLT DstTy = Res.getLLTTy(*getMRI());
340   auto &Ctx = getMF().getFunction().getContext();
341   auto *CFP =
342       ConstantFP::get(Ctx, getAPFloatFromSize(Val, DstTy.getScalarSizeInBits()));
343   return buildFConstant(Res, *CFP);
344 }
345 
346 MachineInstrBuilder MachineIRBuilder::buildFConstant(const DstOp &Res,
347                                                      const APFloat &Val) {
348   auto &Ctx = getMF().getFunction().getContext();
349   auto *CFP = ConstantFP::get(Ctx, Val);
350   return buildFConstant(Res, *CFP);
351 }
352 
353 MachineInstrBuilder MachineIRBuilder::buildBrCond(Register Tst,
354                                                   MachineBasicBlock &Dest) {
355   assert(getMRI()->getType(Tst).isScalar() && "invalid operand type");
356 
357   return buildInstr(TargetOpcode::G_BRCOND).addUse(Tst).addMBB(&Dest);
358 }
359 
360 MachineInstrBuilder MachineIRBuilder::buildLoad(const DstOp &Res,
361                                                 const SrcOp &Addr,
362                                                 MachineMemOperand &MMO) {
363   return buildLoadInstr(TargetOpcode::G_LOAD, Res, Addr, MMO);
364 }
365 
366 MachineInstrBuilder MachineIRBuilder::buildLoadInstr(unsigned Opcode,
367                                                      const DstOp &Res,
368                                                      const SrcOp &Addr,
369                                                      MachineMemOperand &MMO) {
370   assert(Res.getLLTTy(*getMRI()).isValid() && "invalid operand type");
371   assert(Addr.getLLTTy(*getMRI()).isPointer() && "invalid operand type");
372 
373   auto MIB = buildInstr(Opcode);
374   Res.addDefToMIB(*getMRI(), MIB);
375   Addr.addSrcToMIB(MIB);
376   MIB.addMemOperand(&MMO);
377   return MIB;
378 }
379 
380 MachineInstrBuilder MachineIRBuilder::buildStore(const SrcOp &Val,
381                                                  const SrcOp &Addr,
382                                                  MachineMemOperand &MMO) {
383   assert(Val.getLLTTy(*getMRI()).isValid() && "invalid operand type");
384   assert(Addr.getLLTTy(*getMRI()).isPointer() && "invalid operand type");
385 
386   auto MIB = buildInstr(TargetOpcode::G_STORE);
387   Val.addSrcToMIB(MIB);
388   Addr.addSrcToMIB(MIB);
389   MIB.addMemOperand(&MMO);
390   return MIB;
391 }
392 
393 MachineInstrBuilder MachineIRBuilder::buildUAddo(const DstOp &Res,
394                                                  const DstOp &CarryOut,
395                                                  const SrcOp &Op0,
396                                                  const SrcOp &Op1) {
397   return buildInstr(TargetOpcode::G_UADDO, {Res, CarryOut}, {Op0, Op1});
398 }
399 
400 MachineInstrBuilder MachineIRBuilder::buildUAdde(const DstOp &Res,
401                                                  const DstOp &CarryOut,
402                                                  const SrcOp &Op0,
403                                                  const SrcOp &Op1,
404                                                  const SrcOp &CarryIn) {
405   return buildInstr(TargetOpcode::G_UADDE, {Res, CarryOut},
406                     {Op0, Op1, CarryIn});
407 }
408 
409 MachineInstrBuilder MachineIRBuilder::buildAnyExt(const DstOp &Res,
410                                                   const SrcOp &Op) {
411   return buildInstr(TargetOpcode::G_ANYEXT, Res, Op);
412 }
413 
414 MachineInstrBuilder MachineIRBuilder::buildSExt(const DstOp &Res,
415                                                 const SrcOp &Op) {
416   return buildInstr(TargetOpcode::G_SEXT, Res, Op);
417 }
418 
419 MachineInstrBuilder MachineIRBuilder::buildZExt(const DstOp &Res,
420                                                 const SrcOp &Op) {
421   return buildInstr(TargetOpcode::G_ZEXT, Res, Op);
422 }
423 
424 unsigned MachineIRBuilder::getBoolExtOp(bool IsVec, bool IsFP) const {
425   const auto *TLI = getMF().getSubtarget().getTargetLowering();
426   switch (TLI->getBooleanContents(IsVec, IsFP)) {
427   case TargetLoweringBase::ZeroOrNegativeOneBooleanContent:
428     return TargetOpcode::G_SEXT;
429   case TargetLoweringBase::ZeroOrOneBooleanContent:
430     return TargetOpcode::G_ZEXT;
431   default:
432     return TargetOpcode::G_ANYEXT;
433   }
434 }
435 
436 MachineInstrBuilder MachineIRBuilder::buildBoolExt(const DstOp &Res,
437                                                    const SrcOp &Op,
438                                                    bool IsFP) {
439   unsigned ExtOp = getBoolExtOp(getMRI()->getType(Op.getReg()).isVector(), IsFP);
440   return buildInstr(ExtOp, Res, Op);
441 }
442 
443 MachineInstrBuilder MachineIRBuilder::buildExtOrTrunc(unsigned ExtOpc,
444                                                       const DstOp &Res,
445                                                       const SrcOp &Op) {
446   assert((TargetOpcode::G_ANYEXT == ExtOpc || TargetOpcode::G_ZEXT == ExtOpc ||
447           TargetOpcode::G_SEXT == ExtOpc) &&
448          "Expecting Extending Opc");
449   assert(Res.getLLTTy(*getMRI()).isScalar() ||
450          Res.getLLTTy(*getMRI()).isVector());
451   assert(Res.getLLTTy(*getMRI()).isScalar() ==
452          Op.getLLTTy(*getMRI()).isScalar());
453 
454   unsigned Opcode = TargetOpcode::COPY;
455   if (Res.getLLTTy(*getMRI()).getSizeInBits() >
456       Op.getLLTTy(*getMRI()).getSizeInBits())
457     Opcode = ExtOpc;
458   else if (Res.getLLTTy(*getMRI()).getSizeInBits() <
459            Op.getLLTTy(*getMRI()).getSizeInBits())
460     Opcode = TargetOpcode::G_TRUNC;
461   else
462     assert(Res.getLLTTy(*getMRI()) == Op.getLLTTy(*getMRI()));
463 
464   return buildInstr(Opcode, Res, Op);
465 }
466 
467 MachineInstrBuilder MachineIRBuilder::buildSExtOrTrunc(const DstOp &Res,
468                                                        const SrcOp &Op) {
469   return buildExtOrTrunc(TargetOpcode::G_SEXT, Res, Op);
470 }
471 
472 MachineInstrBuilder MachineIRBuilder::buildZExtOrTrunc(const DstOp &Res,
473                                                        const SrcOp &Op) {
474   return buildExtOrTrunc(TargetOpcode::G_ZEXT, Res, Op);
475 }
476 
477 MachineInstrBuilder MachineIRBuilder::buildAnyExtOrTrunc(const DstOp &Res,
478                                                          const SrcOp &Op) {
479   return buildExtOrTrunc(TargetOpcode::G_ANYEXT, Res, Op);
480 }
481 
482 MachineInstrBuilder MachineIRBuilder::buildCast(const DstOp &Dst,
483                                                 const SrcOp &Src) {
484   LLT SrcTy = Src.getLLTTy(*getMRI());
485   LLT DstTy = Dst.getLLTTy(*getMRI());
486   if (SrcTy == DstTy)
487     return buildCopy(Dst, Src);
488 
489   unsigned Opcode;
490   if (SrcTy.isPointer() && DstTy.isScalar())
491     Opcode = TargetOpcode::G_PTRTOINT;
492   else if (DstTy.isPointer() && SrcTy.isScalar())
493     Opcode = TargetOpcode::G_INTTOPTR;
494   else {
495     assert(!SrcTy.isPointer() && !DstTy.isPointer() && "n G_ADDRCAST yet");
496     Opcode = TargetOpcode::G_BITCAST;
497   }
498 
499   return buildInstr(Opcode, Dst, Src);
500 }
501 
502 MachineInstrBuilder MachineIRBuilder::buildExtract(const DstOp &Dst,
503                                                    const SrcOp &Src,
504                                                    uint64_t Index) {
505   LLT SrcTy = Src.getLLTTy(*getMRI());
506   LLT DstTy = Dst.getLLTTy(*getMRI());
507 
508 #ifndef NDEBUG
509   assert(SrcTy.isValid() && "invalid operand type");
510   assert(DstTy.isValid() && "invalid operand type");
511   assert(Index + DstTy.getSizeInBits() <= SrcTy.getSizeInBits() &&
512          "extracting off end of register");
513 #endif
514 
515   if (DstTy.getSizeInBits() == SrcTy.getSizeInBits()) {
516     assert(Index == 0 && "insertion past the end of a register");
517     return buildCast(Dst, Src);
518   }
519 
520   auto Extract = buildInstr(TargetOpcode::G_EXTRACT);
521   Dst.addDefToMIB(*getMRI(), Extract);
522   Src.addSrcToMIB(Extract);
523   Extract.addImm(Index);
524   return Extract;
525 }
526 
527 void MachineIRBuilder::buildSequence(Register Res, ArrayRef<Register> Ops,
528                                      ArrayRef<uint64_t> Indices) {
529 #ifndef NDEBUG
530   assert(Ops.size() == Indices.size() && "incompatible args");
531   assert(!Ops.empty() && "invalid trivial sequence");
532   assert(std::is_sorted(Indices.begin(), Indices.end()) &&
533          "sequence offsets must be in ascending order");
534 
535   assert(getMRI()->getType(Res).isValid() && "invalid operand type");
536   for (auto Op : Ops)
537     assert(getMRI()->getType(Op).isValid() && "invalid operand type");
538 #endif
539 
540   LLT ResTy = getMRI()->getType(Res);
541   LLT OpTy = getMRI()->getType(Ops[0]);
542   unsigned OpSize = OpTy.getSizeInBits();
543   bool MaybeMerge = true;
544   for (unsigned i = 0; i < Ops.size(); ++i) {
545     if (getMRI()->getType(Ops[i]) != OpTy || Indices[i] != i * OpSize) {
546       MaybeMerge = false;
547       break;
548     }
549   }
550 
551   if (MaybeMerge && Ops.size() * OpSize == ResTy.getSizeInBits()) {
552     buildMerge(Res, Ops);
553     return;
554   }
555 
556   Register ResIn = getMRI()->createGenericVirtualRegister(ResTy);
557   buildUndef(ResIn);
558 
559   for (unsigned i = 0; i < Ops.size(); ++i) {
560     Register ResOut = i + 1 == Ops.size()
561                           ? Res
562                           : getMRI()->createGenericVirtualRegister(ResTy);
563     buildInsert(ResOut, ResIn, Ops[i], Indices[i]);
564     ResIn = ResOut;
565   }
566 }
567 
568 MachineInstrBuilder MachineIRBuilder::buildUndef(const DstOp &Res) {
569   return buildInstr(TargetOpcode::G_IMPLICIT_DEF, {Res}, {});
570 }
571 
572 MachineInstrBuilder MachineIRBuilder::buildMerge(const DstOp &Res,
573                                                  ArrayRef<Register> Ops) {
574   // Unfortunately to convert from ArrayRef<LLT> to ArrayRef<SrcOp>,
575   // we need some temporary storage for the DstOp objects. Here we use a
576   // sufficiently large SmallVector to not go through the heap.
577   SmallVector<SrcOp, 8> TmpVec(Ops.begin(), Ops.end());
578   assert(TmpVec.size() > 1);
579   return buildInstr(TargetOpcode::G_MERGE_VALUES, Res, TmpVec);
580 }
581 
582 MachineInstrBuilder MachineIRBuilder::buildUnmerge(ArrayRef<LLT> Res,
583                                                    const SrcOp &Op) {
584   // Unfortunately to convert from ArrayRef<LLT> to ArrayRef<DstOp>,
585   // we need some temporary storage for the DstOp objects. Here we use a
586   // sufficiently large SmallVector to not go through the heap.
587   SmallVector<DstOp, 8> TmpVec(Res.begin(), Res.end());
588   assert(TmpVec.size() > 1);
589   return buildInstr(TargetOpcode::G_UNMERGE_VALUES, TmpVec, Op);
590 }
591 
592 MachineInstrBuilder MachineIRBuilder::buildUnmerge(LLT Res,
593                                                    const SrcOp &Op) {
594   unsigned NumReg = Op.getLLTTy(*getMRI()).getSizeInBits() / Res.getSizeInBits();
595   SmallVector<Register, 8> TmpVec;
596   for (unsigned I = 0; I != NumReg; ++I)
597     TmpVec.push_back(getMRI()->createGenericVirtualRegister(Res));
598   return buildUnmerge(TmpVec, Op);
599 }
600 
601 MachineInstrBuilder MachineIRBuilder::buildUnmerge(ArrayRef<Register> Res,
602                                                    const SrcOp &Op) {
603   // Unfortunately to convert from ArrayRef<Register> to ArrayRef<DstOp>,
604   // we need some temporary storage for the DstOp objects. Here we use a
605   // sufficiently large SmallVector to not go through the heap.
606   SmallVector<DstOp, 8> TmpVec(Res.begin(), Res.end());
607   assert(TmpVec.size() > 1);
608   return buildInstr(TargetOpcode::G_UNMERGE_VALUES, TmpVec, Op);
609 }
610 
611 MachineInstrBuilder MachineIRBuilder::buildBuildVector(const DstOp &Res,
612                                                        ArrayRef<Register> Ops) {
613   // Unfortunately to convert from ArrayRef<Register> to ArrayRef<SrcOp>,
614   // we need some temporary storage for the DstOp objects. Here we use a
615   // sufficiently large SmallVector to not go through the heap.
616   SmallVector<SrcOp, 8> TmpVec(Ops.begin(), Ops.end());
617   return buildInstr(TargetOpcode::G_BUILD_VECTOR, Res, TmpVec);
618 }
619 
620 MachineInstrBuilder MachineIRBuilder::buildSplatVector(const DstOp &Res,
621                                                        const SrcOp &Src) {
622   SmallVector<SrcOp, 8> TmpVec(Res.getLLTTy(*getMRI()).getNumElements(), Src);
623   return buildInstr(TargetOpcode::G_BUILD_VECTOR, Res, TmpVec);
624 }
625 
626 MachineInstrBuilder
627 MachineIRBuilder::buildBuildVectorTrunc(const DstOp &Res,
628                                         ArrayRef<Register> Ops) {
629   // Unfortunately to convert from ArrayRef<Register> to ArrayRef<SrcOp>,
630   // we need some temporary storage for the DstOp objects. Here we use a
631   // sufficiently large SmallVector to not go through the heap.
632   SmallVector<SrcOp, 8> TmpVec(Ops.begin(), Ops.end());
633   return buildInstr(TargetOpcode::G_BUILD_VECTOR_TRUNC, Res, TmpVec);
634 }
635 
636 MachineInstrBuilder
637 MachineIRBuilder::buildConcatVectors(const DstOp &Res, ArrayRef<Register> Ops) {
638   // Unfortunately to convert from ArrayRef<Register> to ArrayRef<SrcOp>,
639   // we need some temporary storage for the DstOp objects. Here we use a
640   // sufficiently large SmallVector to not go through the heap.
641   SmallVector<SrcOp, 8> TmpVec(Ops.begin(), Ops.end());
642   return buildInstr(TargetOpcode::G_CONCAT_VECTORS, Res, TmpVec);
643 }
644 
645 MachineInstrBuilder MachineIRBuilder::buildInsert(const DstOp &Res,
646                                                   const SrcOp &Src,
647                                                   const SrcOp &Op,
648                                                   unsigned Index) {
649   assert(Index + Op.getLLTTy(*getMRI()).getSizeInBits() <=
650              Res.getLLTTy(*getMRI()).getSizeInBits() &&
651          "insertion past the end of a register");
652 
653   if (Res.getLLTTy(*getMRI()).getSizeInBits() ==
654       Op.getLLTTy(*getMRI()).getSizeInBits()) {
655     return buildCast(Res, Op);
656   }
657 
658   return buildInstr(TargetOpcode::G_INSERT, Res, {Src, Op, uint64_t(Index)});
659 }
660 
661 MachineInstrBuilder MachineIRBuilder::buildIntrinsic(Intrinsic::ID ID,
662                                                      ArrayRef<Register> ResultRegs,
663                                                      bool HasSideEffects) {
664   auto MIB =
665       buildInstr(HasSideEffects ? TargetOpcode::G_INTRINSIC_W_SIDE_EFFECTS
666                                 : TargetOpcode::G_INTRINSIC);
667   for (unsigned ResultReg : ResultRegs)
668     MIB.addDef(ResultReg);
669   MIB.addIntrinsicID(ID);
670   return MIB;
671 }
672 
673 MachineInstrBuilder MachineIRBuilder::buildIntrinsic(Intrinsic::ID ID,
674                                                      ArrayRef<DstOp> Results,
675                                                      bool HasSideEffects) {
676   auto MIB =
677       buildInstr(HasSideEffects ? TargetOpcode::G_INTRINSIC_W_SIDE_EFFECTS
678                                 : TargetOpcode::G_INTRINSIC);
679   for (DstOp Result : Results)
680     Result.addDefToMIB(*getMRI(), MIB);
681   MIB.addIntrinsicID(ID);
682   return MIB;
683 }
684 
685 MachineInstrBuilder MachineIRBuilder::buildTrunc(const DstOp &Res,
686                                                  const SrcOp &Op) {
687   return buildInstr(TargetOpcode::G_TRUNC, Res, Op);
688 }
689 
690 MachineInstrBuilder MachineIRBuilder::buildFPTrunc(const DstOp &Res,
691                                                    const SrcOp &Op,
692                                                    Optional<unsigned> Flags) {
693   return buildInstr(TargetOpcode::G_FPTRUNC, Res, Op, Flags);
694 }
695 
696 MachineInstrBuilder MachineIRBuilder::buildICmp(CmpInst::Predicate Pred,
697                                                 const DstOp &Res,
698                                                 const SrcOp &Op0,
699                                                 const SrcOp &Op1) {
700   return buildInstr(TargetOpcode::G_ICMP, Res, {Pred, Op0, Op1});
701 }
702 
703 MachineInstrBuilder MachineIRBuilder::buildFCmp(CmpInst::Predicate Pred,
704                                                 const DstOp &Res,
705                                                 const SrcOp &Op0,
706                                                 const SrcOp &Op1,
707                                                 Optional<unsigned> Flags) {
708 
709   return buildInstr(TargetOpcode::G_FCMP, Res, {Pred, Op0, Op1}, Flags);
710 }
711 
712 MachineInstrBuilder MachineIRBuilder::buildSelect(const DstOp &Res,
713                                                   const SrcOp &Tst,
714                                                   const SrcOp &Op0,
715                                                   const SrcOp &Op1,
716                                                   Optional<unsigned> Flags) {
717 
718   return buildInstr(TargetOpcode::G_SELECT, {Res}, {Tst, Op0, Op1}, Flags);
719 }
720 
721 MachineInstrBuilder
722 MachineIRBuilder::buildInsertVectorElement(const DstOp &Res, const SrcOp &Val,
723                                            const SrcOp &Elt, const SrcOp &Idx) {
724   return buildInstr(TargetOpcode::G_INSERT_VECTOR_ELT, Res, {Val, Elt, Idx});
725 }
726 
727 MachineInstrBuilder
728 MachineIRBuilder::buildExtractVectorElement(const DstOp &Res, const SrcOp &Val,
729                                             const SrcOp &Idx) {
730   return buildInstr(TargetOpcode::G_EXTRACT_VECTOR_ELT, Res, {Val, Idx});
731 }
732 
733 MachineInstrBuilder MachineIRBuilder::buildAtomicCmpXchgWithSuccess(
734     Register OldValRes, Register SuccessRes, Register Addr, Register CmpVal,
735     Register NewVal, MachineMemOperand &MMO) {
736 #ifndef NDEBUG
737   LLT OldValResTy = getMRI()->getType(OldValRes);
738   LLT SuccessResTy = getMRI()->getType(SuccessRes);
739   LLT AddrTy = getMRI()->getType(Addr);
740   LLT CmpValTy = getMRI()->getType(CmpVal);
741   LLT NewValTy = getMRI()->getType(NewVal);
742   assert(OldValResTy.isScalar() && "invalid operand type");
743   assert(SuccessResTy.isScalar() && "invalid operand type");
744   assert(AddrTy.isPointer() && "invalid operand type");
745   assert(CmpValTy.isValid() && "invalid operand type");
746   assert(NewValTy.isValid() && "invalid operand type");
747   assert(OldValResTy == CmpValTy && "type mismatch");
748   assert(OldValResTy == NewValTy && "type mismatch");
749 #endif
750 
751   return buildInstr(TargetOpcode::G_ATOMIC_CMPXCHG_WITH_SUCCESS)
752       .addDef(OldValRes)
753       .addDef(SuccessRes)
754       .addUse(Addr)
755       .addUse(CmpVal)
756       .addUse(NewVal)
757       .addMemOperand(&MMO);
758 }
759 
760 MachineInstrBuilder
761 MachineIRBuilder::buildAtomicCmpXchg(Register OldValRes, Register Addr,
762                                      Register CmpVal, Register NewVal,
763                                      MachineMemOperand &MMO) {
764 #ifndef NDEBUG
765   LLT OldValResTy = getMRI()->getType(OldValRes);
766   LLT AddrTy = getMRI()->getType(Addr);
767   LLT CmpValTy = getMRI()->getType(CmpVal);
768   LLT NewValTy = getMRI()->getType(NewVal);
769   assert(OldValResTy.isScalar() && "invalid operand type");
770   assert(AddrTy.isPointer() && "invalid operand type");
771   assert(CmpValTy.isValid() && "invalid operand type");
772   assert(NewValTy.isValid() && "invalid operand type");
773   assert(OldValResTy == CmpValTy && "type mismatch");
774   assert(OldValResTy == NewValTy && "type mismatch");
775 #endif
776 
777   return buildInstr(TargetOpcode::G_ATOMIC_CMPXCHG)
778       .addDef(OldValRes)
779       .addUse(Addr)
780       .addUse(CmpVal)
781       .addUse(NewVal)
782       .addMemOperand(&MMO);
783 }
784 
785 MachineInstrBuilder MachineIRBuilder::buildAtomicRMW(
786   unsigned Opcode, const DstOp &OldValRes,
787   const SrcOp &Addr, const SrcOp &Val,
788   MachineMemOperand &MMO) {
789 
790 #ifndef NDEBUG
791   LLT OldValResTy = OldValRes.getLLTTy(*getMRI());
792   LLT AddrTy = Addr.getLLTTy(*getMRI());
793   LLT ValTy = Val.getLLTTy(*getMRI());
794   assert(OldValResTy.isScalar() && "invalid operand type");
795   assert(AddrTy.isPointer() && "invalid operand type");
796   assert(ValTy.isValid() && "invalid operand type");
797   assert(OldValResTy == ValTy && "type mismatch");
798   assert(MMO.isAtomic() && "not atomic mem operand");
799 #endif
800 
801   auto MIB = buildInstr(Opcode);
802   OldValRes.addDefToMIB(*getMRI(), MIB);
803   Addr.addSrcToMIB(MIB);
804   Val.addSrcToMIB(MIB);
805   MIB.addMemOperand(&MMO);
806   return MIB;
807 }
808 
809 MachineInstrBuilder
810 MachineIRBuilder::buildAtomicRMWXchg(Register OldValRes, Register Addr,
811                                      Register Val, MachineMemOperand &MMO) {
812   return buildAtomicRMW(TargetOpcode::G_ATOMICRMW_XCHG, OldValRes, Addr, Val,
813                         MMO);
814 }
815 MachineInstrBuilder
816 MachineIRBuilder::buildAtomicRMWAdd(Register OldValRes, Register Addr,
817                                     Register Val, MachineMemOperand &MMO) {
818   return buildAtomicRMW(TargetOpcode::G_ATOMICRMW_ADD, OldValRes, Addr, Val,
819                         MMO);
820 }
821 MachineInstrBuilder
822 MachineIRBuilder::buildAtomicRMWSub(Register OldValRes, Register Addr,
823                                     Register Val, MachineMemOperand &MMO) {
824   return buildAtomicRMW(TargetOpcode::G_ATOMICRMW_SUB, OldValRes, Addr, Val,
825                         MMO);
826 }
827 MachineInstrBuilder
828 MachineIRBuilder::buildAtomicRMWAnd(Register OldValRes, Register Addr,
829                                     Register Val, MachineMemOperand &MMO) {
830   return buildAtomicRMW(TargetOpcode::G_ATOMICRMW_AND, OldValRes, Addr, Val,
831                         MMO);
832 }
833 MachineInstrBuilder
834 MachineIRBuilder::buildAtomicRMWNand(Register OldValRes, Register Addr,
835                                      Register Val, MachineMemOperand &MMO) {
836   return buildAtomicRMW(TargetOpcode::G_ATOMICRMW_NAND, OldValRes, Addr, Val,
837                         MMO);
838 }
839 MachineInstrBuilder MachineIRBuilder::buildAtomicRMWOr(Register OldValRes,
840                                                        Register Addr,
841                                                        Register Val,
842                                                        MachineMemOperand &MMO) {
843   return buildAtomicRMW(TargetOpcode::G_ATOMICRMW_OR, OldValRes, Addr, Val,
844                         MMO);
845 }
846 MachineInstrBuilder
847 MachineIRBuilder::buildAtomicRMWXor(Register OldValRes, Register Addr,
848                                     Register Val, MachineMemOperand &MMO) {
849   return buildAtomicRMW(TargetOpcode::G_ATOMICRMW_XOR, OldValRes, Addr, Val,
850                         MMO);
851 }
852 MachineInstrBuilder
853 MachineIRBuilder::buildAtomicRMWMax(Register OldValRes, Register Addr,
854                                     Register Val, MachineMemOperand &MMO) {
855   return buildAtomicRMW(TargetOpcode::G_ATOMICRMW_MAX, OldValRes, Addr, Val,
856                         MMO);
857 }
858 MachineInstrBuilder
859 MachineIRBuilder::buildAtomicRMWMin(Register OldValRes, Register Addr,
860                                     Register Val, MachineMemOperand &MMO) {
861   return buildAtomicRMW(TargetOpcode::G_ATOMICRMW_MIN, OldValRes, Addr, Val,
862                         MMO);
863 }
864 MachineInstrBuilder
865 MachineIRBuilder::buildAtomicRMWUmax(Register OldValRes, Register Addr,
866                                      Register Val, MachineMemOperand &MMO) {
867   return buildAtomicRMW(TargetOpcode::G_ATOMICRMW_UMAX, OldValRes, Addr, Val,
868                         MMO);
869 }
870 MachineInstrBuilder
871 MachineIRBuilder::buildAtomicRMWUmin(Register OldValRes, Register Addr,
872                                      Register Val, MachineMemOperand &MMO) {
873   return buildAtomicRMW(TargetOpcode::G_ATOMICRMW_UMIN, OldValRes, Addr, Val,
874                         MMO);
875 }
876 
877 MachineInstrBuilder
878 MachineIRBuilder::buildAtomicRMWFAdd(
879   const DstOp &OldValRes, const SrcOp &Addr, const SrcOp &Val,
880   MachineMemOperand &MMO) {
881   return buildAtomicRMW(TargetOpcode::G_ATOMICRMW_FADD, OldValRes, Addr, Val,
882                         MMO);
883 }
884 
885 MachineInstrBuilder
886 MachineIRBuilder::buildAtomicRMWFSub(const DstOp &OldValRes, const SrcOp &Addr, const SrcOp &Val,
887                                      MachineMemOperand &MMO) {
888   return buildAtomicRMW(TargetOpcode::G_ATOMICRMW_FSUB, OldValRes, Addr, Val,
889                         MMO);
890 }
891 
892 MachineInstrBuilder
893 MachineIRBuilder::buildFence(unsigned Ordering, unsigned Scope) {
894   return buildInstr(TargetOpcode::G_FENCE)
895     .addImm(Ordering)
896     .addImm(Scope);
897 }
898 
899 MachineInstrBuilder
900 MachineIRBuilder::buildBlockAddress(Register Res, const BlockAddress *BA) {
901 #ifndef NDEBUG
902   assert(getMRI()->getType(Res).isPointer() && "invalid res type");
903 #endif
904 
905   return buildInstr(TargetOpcode::G_BLOCK_ADDR).addDef(Res).addBlockAddress(BA);
906 }
907 
908 void MachineIRBuilder::validateTruncExt(const LLT &DstTy, const LLT &SrcTy,
909                                         bool IsExtend) {
910 #ifndef NDEBUG
911   if (DstTy.isVector()) {
912     assert(SrcTy.isVector() && "mismatched cast between vector and non-vector");
913     assert(SrcTy.getNumElements() == DstTy.getNumElements() &&
914            "different number of elements in a trunc/ext");
915   } else
916     assert(DstTy.isScalar() && SrcTy.isScalar() && "invalid extend/trunc");
917 
918   if (IsExtend)
919     assert(DstTy.getSizeInBits() > SrcTy.getSizeInBits() &&
920            "invalid narrowing extend");
921   else
922     assert(DstTy.getSizeInBits() < SrcTy.getSizeInBits() &&
923            "invalid widening trunc");
924 #endif
925 }
926 
927 void MachineIRBuilder::validateSelectOp(const LLT &ResTy, const LLT &TstTy,
928                                         const LLT &Op0Ty, const LLT &Op1Ty) {
929 #ifndef NDEBUG
930   assert((ResTy.isScalar() || ResTy.isVector() || ResTy.isPointer()) &&
931          "invalid operand type");
932   assert((ResTy == Op0Ty && ResTy == Op1Ty) && "type mismatch");
933   if (ResTy.isScalar() || ResTy.isPointer())
934     assert(TstTy.isScalar() && "type mismatch");
935   else
936     assert((TstTy.isScalar() ||
937             (TstTy.isVector() &&
938              TstTy.getNumElements() == Op0Ty.getNumElements())) &&
939            "type mismatch");
940 #endif
941 }
942 
943 MachineInstrBuilder MachineIRBuilder::buildInstr(unsigned Opc,
944                                                  ArrayRef<DstOp> DstOps,
945                                                  ArrayRef<SrcOp> SrcOps,
946                                                  Optional<unsigned> Flags) {
947   switch (Opc) {
948   default:
949     break;
950   case TargetOpcode::G_SELECT: {
951     assert(DstOps.size() == 1 && "Invalid select");
952     assert(SrcOps.size() == 3 && "Invalid select");
953     validateSelectOp(
954         DstOps[0].getLLTTy(*getMRI()), SrcOps[0].getLLTTy(*getMRI()),
955         SrcOps[1].getLLTTy(*getMRI()), SrcOps[2].getLLTTy(*getMRI()));
956     break;
957   }
958   case TargetOpcode::G_ADD:
959   case TargetOpcode::G_AND:
960   case TargetOpcode::G_MUL:
961   case TargetOpcode::G_OR:
962   case TargetOpcode::G_SUB:
963   case TargetOpcode::G_XOR:
964   case TargetOpcode::G_UDIV:
965   case TargetOpcode::G_SDIV:
966   case TargetOpcode::G_UREM:
967   case TargetOpcode::G_SREM:
968   case TargetOpcode::G_SMIN:
969   case TargetOpcode::G_SMAX:
970   case TargetOpcode::G_UMIN:
971   case TargetOpcode::G_UMAX: {
972     // All these are binary ops.
973     assert(DstOps.size() == 1 && "Invalid Dst");
974     assert(SrcOps.size() == 2 && "Invalid Srcs");
975     validateBinaryOp(DstOps[0].getLLTTy(*getMRI()),
976                      SrcOps[0].getLLTTy(*getMRI()),
977                      SrcOps[1].getLLTTy(*getMRI()));
978     break;
979   }
980   case TargetOpcode::G_SHL:
981   case TargetOpcode::G_ASHR:
982   case TargetOpcode::G_LSHR: {
983     assert(DstOps.size() == 1 && "Invalid Dst");
984     assert(SrcOps.size() == 2 && "Invalid Srcs");
985     validateShiftOp(DstOps[0].getLLTTy(*getMRI()),
986                     SrcOps[0].getLLTTy(*getMRI()),
987                     SrcOps[1].getLLTTy(*getMRI()));
988     break;
989   }
990   case TargetOpcode::G_SEXT:
991   case TargetOpcode::G_ZEXT:
992   case TargetOpcode::G_ANYEXT:
993     assert(DstOps.size() == 1 && "Invalid Dst");
994     assert(SrcOps.size() == 1 && "Invalid Srcs");
995     validateTruncExt(DstOps[0].getLLTTy(*getMRI()),
996                      SrcOps[0].getLLTTy(*getMRI()), true);
997     break;
998   case TargetOpcode::G_TRUNC:
999   case TargetOpcode::G_FPTRUNC: {
1000     assert(DstOps.size() == 1 && "Invalid Dst");
1001     assert(SrcOps.size() == 1 && "Invalid Srcs");
1002     validateTruncExt(DstOps[0].getLLTTy(*getMRI()),
1003                      SrcOps[0].getLLTTy(*getMRI()), false);
1004     break;
1005   }
1006   case TargetOpcode::G_BITCAST: {
1007     assert(DstOps.size() == 1 && "Invalid Dst");
1008     assert(SrcOps.size() == 1 && "Invalid Srcs");
1009     assert(DstOps[0].getLLTTy(*getMRI()).getSizeInBits() ==
1010            SrcOps[0].getLLTTy(*getMRI()).getSizeInBits() && "invalid bitcast");
1011     break;
1012   }
1013   case TargetOpcode::COPY:
1014     assert(DstOps.size() == 1 && "Invalid Dst");
1015     // If the caller wants to add a subreg source it has to be done separately
1016     // so we may not have any SrcOps at this point yet.
1017     break;
1018   case TargetOpcode::G_FCMP:
1019   case TargetOpcode::G_ICMP: {
1020     assert(DstOps.size() == 1 && "Invalid Dst Operands");
1021     assert(SrcOps.size() == 3 && "Invalid Src Operands");
1022     // For F/ICMP, the first src operand is the predicate, followed by
1023     // the two comparands.
1024     assert(SrcOps[0].getSrcOpKind() == SrcOp::SrcType::Ty_Predicate &&
1025            "Expecting predicate");
1026     assert([&]() -> bool {
1027       CmpInst::Predicate Pred = SrcOps[0].getPredicate();
1028       return Opc == TargetOpcode::G_ICMP ? CmpInst::isIntPredicate(Pred)
1029                                          : CmpInst::isFPPredicate(Pred);
1030     }() && "Invalid predicate");
1031     assert(SrcOps[1].getLLTTy(*getMRI()) == SrcOps[2].getLLTTy(*getMRI()) &&
1032            "Type mismatch");
1033     assert([&]() -> bool {
1034       LLT Op0Ty = SrcOps[1].getLLTTy(*getMRI());
1035       LLT DstTy = DstOps[0].getLLTTy(*getMRI());
1036       if (Op0Ty.isScalar() || Op0Ty.isPointer())
1037         return DstTy.isScalar();
1038       else
1039         return DstTy.isVector() &&
1040                DstTy.getNumElements() == Op0Ty.getNumElements();
1041     }() && "Type Mismatch");
1042     break;
1043   }
1044   case TargetOpcode::G_UNMERGE_VALUES: {
1045     assert(!DstOps.empty() && "Invalid trivial sequence");
1046     assert(SrcOps.size() == 1 && "Invalid src for Unmerge");
1047     assert(std::all_of(DstOps.begin(), DstOps.end(),
1048                        [&, this](const DstOp &Op) {
1049                          return Op.getLLTTy(*getMRI()) ==
1050                                 DstOps[0].getLLTTy(*getMRI());
1051                        }) &&
1052            "type mismatch in output list");
1053     assert(DstOps.size() * DstOps[0].getLLTTy(*getMRI()).getSizeInBits() ==
1054                SrcOps[0].getLLTTy(*getMRI()).getSizeInBits() &&
1055            "input operands do not cover output register");
1056     break;
1057   }
1058   case TargetOpcode::G_MERGE_VALUES: {
1059     assert(!SrcOps.empty() && "invalid trivial sequence");
1060     assert(DstOps.size() == 1 && "Invalid Dst");
1061     assert(std::all_of(SrcOps.begin(), SrcOps.end(),
1062                        [&, this](const SrcOp &Op) {
1063                          return Op.getLLTTy(*getMRI()) ==
1064                                 SrcOps[0].getLLTTy(*getMRI());
1065                        }) &&
1066            "type mismatch in input list");
1067     assert(SrcOps.size() * SrcOps[0].getLLTTy(*getMRI()).getSizeInBits() ==
1068                DstOps[0].getLLTTy(*getMRI()).getSizeInBits() &&
1069            "input operands do not cover output register");
1070     if (SrcOps.size() == 1)
1071       return buildCast(DstOps[0], SrcOps[0]);
1072     if (DstOps[0].getLLTTy(*getMRI()).isVector()) {
1073       if (SrcOps[0].getLLTTy(*getMRI()).isVector())
1074         return buildInstr(TargetOpcode::G_CONCAT_VECTORS, DstOps, SrcOps);
1075       return buildInstr(TargetOpcode::G_BUILD_VECTOR, DstOps, SrcOps);
1076     }
1077     break;
1078   }
1079   case TargetOpcode::G_EXTRACT_VECTOR_ELT: {
1080     assert(DstOps.size() == 1 && "Invalid Dst size");
1081     assert(SrcOps.size() == 2 && "Invalid Src size");
1082     assert(SrcOps[0].getLLTTy(*getMRI()).isVector() && "Invalid operand type");
1083     assert((DstOps[0].getLLTTy(*getMRI()).isScalar() ||
1084             DstOps[0].getLLTTy(*getMRI()).isPointer()) &&
1085            "Invalid operand type");
1086     assert(SrcOps[1].getLLTTy(*getMRI()).isScalar() && "Invalid operand type");
1087     assert(SrcOps[0].getLLTTy(*getMRI()).getElementType() ==
1088                DstOps[0].getLLTTy(*getMRI()) &&
1089            "Type mismatch");
1090     break;
1091   }
1092   case TargetOpcode::G_INSERT_VECTOR_ELT: {
1093     assert(DstOps.size() == 1 && "Invalid dst size");
1094     assert(SrcOps.size() == 3 && "Invalid src size");
1095     assert(DstOps[0].getLLTTy(*getMRI()).isVector() &&
1096            SrcOps[0].getLLTTy(*getMRI()).isVector() && "Invalid operand type");
1097     assert(DstOps[0].getLLTTy(*getMRI()).getElementType() ==
1098                SrcOps[1].getLLTTy(*getMRI()) &&
1099            "Type mismatch");
1100     assert(SrcOps[2].getLLTTy(*getMRI()).isScalar() && "Invalid index");
1101     assert(DstOps[0].getLLTTy(*getMRI()).getNumElements() ==
1102                SrcOps[0].getLLTTy(*getMRI()).getNumElements() &&
1103            "Type mismatch");
1104     break;
1105   }
1106   case TargetOpcode::G_BUILD_VECTOR: {
1107     assert((!SrcOps.empty() || SrcOps.size() < 2) &&
1108            "Must have at least 2 operands");
1109     assert(DstOps.size() == 1 && "Invalid DstOps");
1110     assert(DstOps[0].getLLTTy(*getMRI()).isVector() &&
1111            "Res type must be a vector");
1112     assert(std::all_of(SrcOps.begin(), SrcOps.end(),
1113                        [&, this](const SrcOp &Op) {
1114                          return Op.getLLTTy(*getMRI()) ==
1115                                 SrcOps[0].getLLTTy(*getMRI());
1116                        }) &&
1117            "type mismatch in input list");
1118     assert(SrcOps.size() * SrcOps[0].getLLTTy(*getMRI()).getSizeInBits() ==
1119                DstOps[0].getLLTTy(*getMRI()).getSizeInBits() &&
1120            "input scalars do not exactly cover the output vector register");
1121     break;
1122   }
1123   case TargetOpcode::G_BUILD_VECTOR_TRUNC: {
1124     assert((!SrcOps.empty() || SrcOps.size() < 2) &&
1125            "Must have at least 2 operands");
1126     assert(DstOps.size() == 1 && "Invalid DstOps");
1127     assert(DstOps[0].getLLTTy(*getMRI()).isVector() &&
1128            "Res type must be a vector");
1129     assert(std::all_of(SrcOps.begin(), SrcOps.end(),
1130                        [&, this](const SrcOp &Op) {
1131                          return Op.getLLTTy(*getMRI()) ==
1132                                 SrcOps[0].getLLTTy(*getMRI());
1133                        }) &&
1134            "type mismatch in input list");
1135     if (SrcOps[0].getLLTTy(*getMRI()).getSizeInBits() ==
1136         DstOps[0].getLLTTy(*getMRI()).getElementType().getSizeInBits())
1137       return buildInstr(TargetOpcode::G_BUILD_VECTOR, DstOps, SrcOps);
1138     break;
1139   }
1140   case TargetOpcode::G_CONCAT_VECTORS: {
1141     assert(DstOps.size() == 1 && "Invalid DstOps");
1142     assert((!SrcOps.empty() || SrcOps.size() < 2) &&
1143            "Must have at least 2 operands");
1144     assert(std::all_of(SrcOps.begin(), SrcOps.end(),
1145                        [&, this](const SrcOp &Op) {
1146                          return (Op.getLLTTy(*getMRI()).isVector() &&
1147                                  Op.getLLTTy(*getMRI()) ==
1148                                      SrcOps[0].getLLTTy(*getMRI()));
1149                        }) &&
1150            "type mismatch in input list");
1151     assert(SrcOps.size() * SrcOps[0].getLLTTy(*getMRI()).getSizeInBits() ==
1152                DstOps[0].getLLTTy(*getMRI()).getSizeInBits() &&
1153            "input vectors do not exactly cover the output vector register");
1154     break;
1155   }
1156   case TargetOpcode::G_UADDE: {
1157     assert(DstOps.size() == 2 && "Invalid no of dst operands");
1158     assert(SrcOps.size() == 3 && "Invalid no of src operands");
1159     assert(DstOps[0].getLLTTy(*getMRI()).isScalar() && "Invalid operand");
1160     assert((DstOps[0].getLLTTy(*getMRI()) == SrcOps[0].getLLTTy(*getMRI())) &&
1161            (DstOps[0].getLLTTy(*getMRI()) == SrcOps[1].getLLTTy(*getMRI())) &&
1162            "Invalid operand");
1163     assert(DstOps[1].getLLTTy(*getMRI()).isScalar() && "Invalid operand");
1164     assert(DstOps[1].getLLTTy(*getMRI()) == SrcOps[2].getLLTTy(*getMRI()) &&
1165            "type mismatch");
1166     break;
1167   }
1168   }
1169 
1170   auto MIB = buildInstr(Opc);
1171   for (const DstOp &Op : DstOps)
1172     Op.addDefToMIB(*getMRI(), MIB);
1173   for (const SrcOp &Op : SrcOps)
1174     Op.addSrcToMIB(MIB);
1175   if (Flags)
1176     MIB->setFlags(*Flags);
1177   return MIB;
1178 }
1179