1 //===-- llvm/CodeGen/GlobalISel/MachineIRBuilder.cpp - MIBuilder--*- C++ -*-==//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 /// \file
10 /// This file implements the MachineIRBuidler class.
11 //===----------------------------------------------------------------------===//
12 #include "llvm/CodeGen/GlobalISel/MachineIRBuilder.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/IR/DebugInfo.h"
19 #include "llvm/Target/TargetInstrInfo.h"
20 #include "llvm/Target/TargetOpcodes.h"
21 #include "llvm/Target/TargetSubtargetInfo.h"
22 
23 using namespace llvm;
24 
25 void MachineIRBuilder::setMF(MachineFunction &MF) {
26   this->MF = &MF;
27   this->MBB = nullptr;
28   this->MRI = &MF.getRegInfo();
29   this->TII = MF.getSubtarget().getInstrInfo();
30   this->DL = DebugLoc();
31   this->II = MachineBasicBlock::iterator();
32   this->InsertedInstr = nullptr;
33 }
34 
35 void MachineIRBuilder::setMBB(MachineBasicBlock &MBB) {
36   this->MBB = &MBB;
37   this->II = MBB.end();
38   assert(&getMF() == MBB.getParent() &&
39          "Basic block is in a different function");
40 }
41 
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();
46 }
47 
48 void MachineIRBuilder::setInsertPt(MachineBasicBlock &MBB,
49                                    MachineBasicBlock::iterator II) {
50   assert(MBB.getParent() == &getMF() &&
51          "Basic block is in a different function");
52   this->MBB = &MBB;
53   this->II = II;
54 }
55 
56 void MachineIRBuilder::recordInsertions(
57     std::function<void(MachineInstr *)> Inserted) {
58   InsertedInstr = std::move(Inserted);
59 }
60 
61 void MachineIRBuilder::stopRecordingInsertions() {
62   InsertedInstr = nullptr;
63 }
64 
65 //------------------------------------------------------------------------------
66 // Build instruction variants.
67 //------------------------------------------------------------------------------
68 
69 MachineInstrBuilder MachineIRBuilder::buildInstr(unsigned Opcode) {
70   return insertInstr(buildInstrNoInsert(Opcode));
71 }
72 
73 MachineInstrBuilder MachineIRBuilder::buildInstrNoInsert(unsigned Opcode) {
74   MachineInstrBuilder MIB = BuildMI(getMF(), DL, getTII().get(Opcode));
75   return MIB;
76 }
77 
78 
79 MachineInstrBuilder MachineIRBuilder::insertInstr(MachineInstrBuilder MIB) {
80   getMBB().insert(getInsertPt(), MIB);
81   if (InsertedInstr)
82     InsertedInstr(MIB);
83   return MIB;
84 }
85 
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)
96       .addMetadata(Expr);
97 }
98 
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)
107       .addImm(Offset)
108       .addMetadata(Variable)
109       .addMetadata(Expr);
110 }
111 
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)
120       .addFrameIndex(FI)
121       .addImm(0)
122       .addMetadata(Variable)
123       .addMetadata(Expr);
124 }
125 
126 MachineInstrBuilder MachineIRBuilder::buildConstDbgValue(const Constant &C,
127                                                          unsigned Offset,
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)
137       MIB.addCImm(CI);
138     else
139       MIB.addImm(CI->getZExtValue());
140   } else if (auto *CFP = dyn_cast<ConstantFP>(&C)) {
141     MIB.addFPImm(CFP);
142   } else {
143     // Insert %noreg if we didn't find a usable constant and had to drop it.
144     MIB.addReg(0U);
145   }
146 
147   return MIB.addImm(Offset).addMetadata(Variable).addMetadata(Expr);
148 }
149 
150 MachineInstrBuilder MachineIRBuilder::buildFrameIndex(unsigned Res, int Idx) {
151   assert(MRI->getType(Res).isPointer() && "invalid operand type");
152   return buildInstr(TargetOpcode::G_FRAME_INDEX)
153       .addDef(Res)
154       .addFrameIndex(Idx);
155 }
156 
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");
163 
164   return buildInstr(TargetOpcode::G_GLOBAL_VALUE)
165       .addDef(Res)
166       .addGlobalAddress(GV);
167 }
168 
169 MachineInstrBuilder MachineIRBuilder::buildAdd(unsigned Res, unsigned Op0,
170                                                unsigned Op1) {
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");
175 
176   return buildInstr(TargetOpcode::G_ADD)
177       .addDef(Res)
178       .addUse(Op0)
179       .addUse(Op1);
180 }
181 
182 MachineInstrBuilder MachineIRBuilder::buildGEP(unsigned Res, unsigned Op0,
183                                                unsigned Op1) {
184   assert(MRI->getType(Res).isPointer() &&
185          MRI->getType(Res) == MRI->getType(Op0) && "type mismatch");
186   assert(MRI->getType(Op1).isScalar()  && "invalid offset type");
187 
188   return buildInstr(TargetOpcode::G_GEP)
189       .addDef(Res)
190       .addUse(Op0)
191       .addUse(Op1);
192 }
193 
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");
199 
200   if (Value == 0) {
201     Res = Op0;
202     return None;
203   }
204 
205   Res = MRI->createGenericVirtualRegister(MRI->getType(Op0));
206   unsigned TmpReg = MRI->createGenericVirtualRegister(ValueTy);
207 
208   buildConstant(TmpReg, Value);
209   return buildGEP(Res, Op0, TmpReg);
210 }
211 
212 MachineInstrBuilder MachineIRBuilder::buildPtrMask(unsigned Res, unsigned Op0,
213                                                    uint32_t NumBits) {
214   assert(MRI->getType(Res).isPointer() &&
215          MRI->getType(Res) == MRI->getType(Op0) && "type mismatch");
216 
217   return buildInstr(TargetOpcode::G_PTR_MASK)
218       .addDef(Res)
219       .addUse(Op0)
220       .addImm(NumBits);
221 }
222 
223 MachineInstrBuilder MachineIRBuilder::buildSub(unsigned Res, unsigned Op0,
224                                                unsigned Op1) {
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");
229 
230   return buildInstr(TargetOpcode::G_SUB)
231       .addDef(Res)
232       .addUse(Op0)
233       .addUse(Op1);
234 }
235 
236 MachineInstrBuilder MachineIRBuilder::buildMul(unsigned Res, unsigned Op0,
237                                                unsigned Op1) {
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");
242 
243   return buildInstr(TargetOpcode::G_MUL)
244       .addDef(Res)
245       .addUse(Op0)
246       .addUse(Op1);
247 }
248 
249 MachineInstrBuilder MachineIRBuilder::buildAnd(unsigned Res, unsigned Op0,
250                                                unsigned Op1) {
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");
255 
256   return buildInstr(TargetOpcode::G_AND)
257       .addDef(Res)
258       .addUse(Op0)
259       .addUse(Op1);
260 }
261 
262 MachineInstrBuilder MachineIRBuilder::buildBr(MachineBasicBlock &Dest) {
263   return buildInstr(TargetOpcode::G_BR).addMBB(&Dest);
264 }
265 
266 MachineInstrBuilder MachineIRBuilder::buildBrIndirect(unsigned Tgt) {
267   return buildInstr(TargetOpcode::G_BRINDIRECT).addUse(Tgt);
268 }
269 
270 MachineInstrBuilder MachineIRBuilder::buildCopy(unsigned Res, unsigned Op) {
271   return buildInstr(TargetOpcode::COPY).addDef(Res).addUse(Op);
272 }
273 
274 MachineInstrBuilder MachineIRBuilder::buildConstant(unsigned Res,
275                                                     const ConstantInt &Val) {
276   LLT Ty = MRI->getType(Res);
277 
278   assert((Ty.isScalar() || Ty.isPointer()) && "invalid operand type");
279 
280   const ConstantInt *NewVal = &Val;
281   if (Ty.getSizeInBits() != Val.getBitWidth())
282     NewVal = ConstantInt::get(MF->getFunction()->getContext(),
283                               Val.getValue().sextOrTrunc(Ty.getSizeInBits()));
284 
285   return buildInstr(TargetOpcode::G_CONSTANT).addDef(Res).addCImm(NewVal);
286 }
287 
288 MachineInstrBuilder MachineIRBuilder::buildConstant(unsigned Res,
289                                                     int64_t Val) {
290   auto IntN = IntegerType::get(MF->getFunction()->getContext(),
291                                MRI->getType(Res).getSizeInBits());
292   ConstantInt *CI = ConstantInt::get(IntN, Val, true);
293   return buildConstant(Res, *CI);
294 }
295 
296 MachineInstrBuilder MachineIRBuilder::buildFConstant(unsigned Res,
297                                                      const ConstantFP &Val) {
298   assert(MRI->getType(Res).isScalar() && "invalid operand type");
299 
300   return buildInstr(TargetOpcode::G_FCONSTANT).addDef(Res).addFPImm(&Val);
301 }
302 
303 MachineInstrBuilder MachineIRBuilder::buildBrCond(unsigned Tst,
304                                                   MachineBasicBlock &Dest) {
305   assert(MRI->getType(Tst).isScalar() && "invalid operand type");
306 
307   return buildInstr(TargetOpcode::G_BRCOND).addUse(Tst).addMBB(&Dest);
308 }
309 
310 MachineInstrBuilder MachineIRBuilder::buildLoad(unsigned Res, unsigned Addr,
311                                                 MachineMemOperand &MMO) {
312   assert(MRI->getType(Res).isValid() && "invalid operand type");
313   assert(MRI->getType(Addr).isPointer() && "invalid operand type");
314 
315   return buildInstr(TargetOpcode::G_LOAD)
316       .addDef(Res)
317       .addUse(Addr)
318       .addMemOperand(&MMO);
319 }
320 
321 MachineInstrBuilder MachineIRBuilder::buildStore(unsigned Val, unsigned Addr,
322                                                  MachineMemOperand &MMO) {
323   assert(MRI->getType(Val).isValid() && "invalid operand type");
324   assert(MRI->getType(Addr).isPointer() && "invalid operand type");
325 
326   return buildInstr(TargetOpcode::G_STORE)
327       .addUse(Val)
328       .addUse(Addr)
329       .addMemOperand(&MMO);
330 }
331 
332 MachineInstrBuilder MachineIRBuilder::buildUAdde(unsigned Res,
333                                                  unsigned CarryOut,
334                                                  unsigned Op0, unsigned Op1,
335                                                  unsigned CarryIn) {
336   assert(MRI->getType(Res).isScalar() && "invalid operand type");
337   assert(MRI->getType(Res) == MRI->getType(Op0) &&
338          MRI->getType(Res) == MRI->getType(Op1) && "type mismatch");
339   assert(MRI->getType(CarryOut).isScalar() && "invalid operand type");
340   assert(MRI->getType(CarryOut) == MRI->getType(CarryIn) && "type mismatch");
341 
342   return buildInstr(TargetOpcode::G_UADDE)
343       .addDef(Res)
344       .addDef(CarryOut)
345       .addUse(Op0)
346       .addUse(Op1)
347       .addUse(CarryIn);
348 }
349 
350 MachineInstrBuilder MachineIRBuilder::buildAnyExt(unsigned Res, unsigned Op) {
351   validateTruncExt(Res, Op, true);
352   return buildInstr(TargetOpcode::G_ANYEXT).addDef(Res).addUse(Op);
353 }
354 
355 MachineInstrBuilder MachineIRBuilder::buildSExt(unsigned Res, unsigned Op) {
356   validateTruncExt(Res, Op, true);
357   return buildInstr(TargetOpcode::G_SEXT).addDef(Res).addUse(Op);
358 }
359 
360 MachineInstrBuilder MachineIRBuilder::buildZExt(unsigned Res, unsigned Op) {
361   validateTruncExt(Res, Op, true);
362   return buildInstr(TargetOpcode::G_ZEXT).addDef(Res).addUse(Op);
363 }
364 
365 MachineInstrBuilder MachineIRBuilder::buildSExtOrTrunc(unsigned Res,
366                                                        unsigned Op) {
367   unsigned Opcode = TargetOpcode::COPY;
368   if (MRI->getType(Res).getSizeInBits() > MRI->getType(Op).getSizeInBits())
369     Opcode = TargetOpcode::G_SEXT;
370   else if (MRI->getType(Res).getSizeInBits() < MRI->getType(Op).getSizeInBits())
371     Opcode = TargetOpcode::G_TRUNC;
372 
373   return buildInstr(Opcode).addDef(Res).addUse(Op);
374 }
375 
376 MachineInstrBuilder MachineIRBuilder::buildZExtOrTrunc(unsigned Res,
377                                                        unsigned Op) {
378   unsigned Opcode = TargetOpcode::COPY;
379   if (MRI->getType(Res).getSizeInBits() > MRI->getType(Op).getSizeInBits())
380     Opcode = TargetOpcode::G_ZEXT;
381   else if (MRI->getType(Res).getSizeInBits() < MRI->getType(Op).getSizeInBits())
382     Opcode = TargetOpcode::G_TRUNC;
383 
384   return buildInstr(Opcode).addDef(Res).addUse(Op);
385 }
386 
387 
388 MachineInstrBuilder MachineIRBuilder::buildCast(unsigned Dst, unsigned Src) {
389   LLT SrcTy = MRI->getType(Src);
390   LLT DstTy = MRI->getType(Dst);
391   if (SrcTy == DstTy)
392     return buildCopy(Dst, Src);
393 
394   unsigned Opcode;
395   if (SrcTy.isPointer() && DstTy.isScalar())
396     Opcode = TargetOpcode::G_PTRTOINT;
397   else if (DstTy.isPointer() && SrcTy.isScalar())
398     Opcode = TargetOpcode::G_INTTOPTR;
399   else {
400     assert(!SrcTy.isPointer() && !DstTy.isPointer() && "n G_ADDRCAST yet");
401     Opcode = TargetOpcode::G_BITCAST;
402   }
403 
404   return buildInstr(Opcode).addDef(Dst).addUse(Src);
405 }
406 
407 MachineInstrBuilder MachineIRBuilder::buildExtract(unsigned Res, unsigned Src,
408                                                    uint64_t Index) {
409 #ifndef NDEBUG
410   assert(MRI->getType(Src).isValid() && "invalid operand type");
411   assert(MRI->getType(Res).isValid() && "invalid operand type");
412   assert(Index + MRI->getType(Res).getSizeInBits() <=
413              MRI->getType(Src).getSizeInBits() &&
414          "extracting off end of register");
415 #endif
416 
417   if (MRI->getType(Res).getSizeInBits() == MRI->getType(Src).getSizeInBits()) {
418     assert(Index == 0 && "insertion past the end of a register");
419     return buildCast(Res, Src);
420   }
421 
422   return buildInstr(TargetOpcode::G_EXTRACT)
423       .addDef(Res)
424       .addUse(Src)
425       .addImm(Index);
426 }
427 
428 MachineInstrBuilder
429 MachineIRBuilder::buildSequence(unsigned Res,
430                                 ArrayRef<unsigned> Ops,
431                                 ArrayRef<uint64_t> Indices) {
432 #ifndef NDEBUG
433   assert(Ops.size() == Indices.size() && "incompatible args");
434   assert(!Ops.empty() && "invalid trivial sequence");
435   assert(std::is_sorted(Indices.begin(), Indices.end()) &&
436          "sequence offsets must be in ascending order");
437 
438   assert(MRI->getType(Res).isValid() && "invalid operand type");
439   for (auto Op : Ops)
440     assert(MRI->getType(Op).isValid() && "invalid operand type");
441 #endif
442 
443   MachineInstrBuilder MIB = buildInstr(TargetOpcode::G_SEQUENCE);
444   MIB.addDef(Res);
445   for (unsigned i = 0; i < Ops.size(); ++i) {
446     MIB.addUse(Ops[i]);
447     MIB.addImm(Indices[i]);
448   }
449   return MIB;
450 }
451 
452 MachineInstrBuilder MachineIRBuilder::buildUndef(unsigned Res) {
453   return buildInstr(TargetOpcode::IMPLICIT_DEF).addDef(Res);
454 }
455 
456 MachineInstrBuilder MachineIRBuilder::buildMerge(unsigned Res,
457                                                  ArrayRef<unsigned> Ops) {
458 
459 #ifndef NDEBUG
460   assert(!Ops.empty() && "invalid trivial sequence");
461   LLT Ty = MRI->getType(Ops[0]);
462   for (auto Reg : Ops)
463     assert(MRI->getType(Reg) == Ty && "type mismatch in input list");
464   assert(Ops.size() * MRI->getType(Ops[0]).getSizeInBits() ==
465              MRI->getType(Res).getSizeInBits() &&
466          "input operands do not cover output register");
467 #endif
468 
469   MachineInstrBuilder MIB = buildInstr(TargetOpcode::G_MERGE_VALUES);
470   MIB.addDef(Res);
471   for (unsigned i = 0; i < Ops.size(); ++i)
472     MIB.addUse(Ops[i]);
473   return MIB;
474 }
475 
476 MachineInstrBuilder MachineIRBuilder::buildUnmerge(ArrayRef<unsigned> Res,
477                                                    unsigned Op) {
478 
479 #ifndef NDEBUG
480   assert(!Res.empty() && "invalid trivial sequence");
481   LLT Ty = MRI->getType(Res[0]);
482   for (auto Reg : Res)
483     assert(MRI->getType(Reg) == Ty && "type mismatch in input list");
484   assert(Res.size() * MRI->getType(Res[0]).getSizeInBits() ==
485              MRI->getType(Op).getSizeInBits() &&
486          "input operands do not cover output register");
487 #endif
488 
489   MachineInstrBuilder MIB = buildInstr(TargetOpcode::G_UNMERGE_VALUES);
490   for (unsigned i = 0; i < Res.size(); ++i)
491     MIB.addDef(Res[i]);
492   MIB.addUse(Op);
493   return MIB;
494 }
495 
496 MachineInstrBuilder MachineIRBuilder::buildInsert(unsigned Res, unsigned Src,
497                                                   unsigned Op, unsigned Index) {
498   if (MRI->getType(Res).getSizeInBits() == MRI->getType(Op).getSizeInBits()) {
499     assert(Index == 0 && "insertion past the end of a register");
500     return buildCast(Res, Op);
501   }
502 
503   return buildInstr(TargetOpcode::G_INSERT)
504       .addDef(Res)
505       .addUse(Src)
506       .addUse(Op)
507       .addImm(Index);
508 }
509 
510 MachineInstrBuilder MachineIRBuilder::buildIntrinsic(Intrinsic::ID ID,
511                                                      unsigned Res,
512                                                      bool HasSideEffects) {
513   auto MIB =
514       buildInstr(HasSideEffects ? TargetOpcode::G_INTRINSIC_W_SIDE_EFFECTS
515                                 : TargetOpcode::G_INTRINSIC);
516   if (Res)
517     MIB.addDef(Res);
518   MIB.addIntrinsicID(ID);
519   return MIB;
520 }
521 
522 MachineInstrBuilder MachineIRBuilder::buildTrunc(unsigned Res, unsigned Op) {
523   validateTruncExt(Res, Op, false);
524   return buildInstr(TargetOpcode::G_TRUNC).addDef(Res).addUse(Op);
525 }
526 
527 MachineInstrBuilder MachineIRBuilder::buildFPTrunc(unsigned Res, unsigned Op) {
528   validateTruncExt(Res, Op, false);
529   return buildInstr(TargetOpcode::G_FPTRUNC).addDef(Res).addUse(Op);
530 }
531 
532 MachineInstrBuilder MachineIRBuilder::buildICmp(CmpInst::Predicate Pred,
533                                                 unsigned Res, unsigned Op0,
534                                                 unsigned Op1) {
535 #ifndef NDEBUG
536   assert(MRI->getType(Op0) == MRI->getType(Op0) && "type mismatch");
537   assert(CmpInst::isIntPredicate(Pred) && "invalid predicate");
538   if (MRI->getType(Op0).isScalar() || MRI->getType(Op0).isPointer())
539     assert(MRI->getType(Res).isScalar() && "type mismatch");
540   else
541     assert(MRI->getType(Res).isVector() &&
542            MRI->getType(Res).getNumElements() ==
543                MRI->getType(Op0).getNumElements() &&
544            "type mismatch");
545 #endif
546 
547   return buildInstr(TargetOpcode::G_ICMP)
548       .addDef(Res)
549       .addPredicate(Pred)
550       .addUse(Op0)
551       .addUse(Op1);
552 }
553 
554 MachineInstrBuilder MachineIRBuilder::buildFCmp(CmpInst::Predicate Pred,
555                                                 unsigned Res, unsigned Op0,
556                                                 unsigned Op1) {
557 #ifndef NDEBUG
558   assert((MRI->getType(Op0).isScalar() || MRI->getType(Op0).isVector()) &&
559          "invalid operand type");
560   assert(MRI->getType(Op0) == MRI->getType(Op1) && "type mismatch");
561   assert(CmpInst::isFPPredicate(Pred) && "invalid predicate");
562   if (MRI->getType(Op0).isScalar())
563     assert(MRI->getType(Res).isScalar() && "type mismatch");
564   else
565     assert(MRI->getType(Res).isVector() &&
566            MRI->getType(Res).getNumElements() ==
567                MRI->getType(Op0).getNumElements() &&
568            "type mismatch");
569 #endif
570 
571   return buildInstr(TargetOpcode::G_FCMP)
572       .addDef(Res)
573       .addPredicate(Pred)
574       .addUse(Op0)
575       .addUse(Op1);
576 }
577 
578 MachineInstrBuilder MachineIRBuilder::buildSelect(unsigned Res, unsigned Tst,
579                                                   unsigned Op0, unsigned Op1) {
580 #ifndef NDEBUG
581   LLT ResTy = MRI->getType(Res);
582   assert((ResTy.isScalar() || ResTy.isVector() || ResTy.isPointer()) &&
583          "invalid operand type");
584   assert(ResTy == MRI->getType(Op0) && ResTy == MRI->getType(Op1) &&
585          "type mismatch");
586   if (ResTy.isScalar() || ResTy.isPointer())
587     assert(MRI->getType(Tst).isScalar() && "type mismatch");
588   else
589     assert((MRI->getType(Tst).isScalar() ||
590             (MRI->getType(Tst).isVector() &&
591              MRI->getType(Tst).getNumElements() ==
592                  MRI->getType(Op0).getNumElements())) &&
593            "type mismatch");
594 #endif
595 
596   return buildInstr(TargetOpcode::G_SELECT)
597       .addDef(Res)
598       .addUse(Tst)
599       .addUse(Op0)
600       .addUse(Op1);
601 }
602 
603 MachineInstrBuilder MachineIRBuilder::buildInsertVectorElement(unsigned Res,
604                                                                unsigned Val,
605                                                                unsigned Elt,
606                                                                unsigned Idx) {
607 #ifndef NDEBUG
608   LLT ResTy = MRI->getType(Res);
609   LLT ValTy = MRI->getType(Val);
610   LLT EltTy = MRI->getType(Elt);
611   LLT IdxTy = MRI->getType(Idx);
612   assert(ResTy.isVector() && ValTy.isVector() && "invalid operand type");
613   assert(IdxTy.isScalar() && "invalid operand type");
614   assert(ResTy.getNumElements() == ValTy.getNumElements() && "type mismatch");
615   assert(ResTy.getElementType() == EltTy && "type mismatch");
616 #endif
617 
618   return buildInstr(TargetOpcode::G_INSERT_VECTOR_ELT)
619       .addDef(Res)
620       .addUse(Val)
621       .addUse(Elt)
622       .addUse(Idx);
623 }
624 
625 MachineInstrBuilder MachineIRBuilder::buildExtractVectorElement(unsigned Res,
626                                                                 unsigned Val,
627                                                                 unsigned Idx) {
628 #ifndef NDEBUG
629   LLT ResTy = MRI->getType(Res);
630   LLT ValTy = MRI->getType(Val);
631   LLT IdxTy = MRI->getType(Idx);
632   assert(ValTy.isVector() && "invalid operand type");
633   assert((ResTy.isScalar() || ResTy.isPointer()) && "invalid operand type");
634   assert(IdxTy.isScalar() && "invalid operand type");
635   assert(ValTy.getElementType() == ResTy && "type mismatch");
636 #endif
637 
638   return buildInstr(TargetOpcode::G_EXTRACT_VECTOR_ELT)
639       .addDef(Res)
640       .addUse(Val)
641       .addUse(Idx);
642 }
643 
644 void MachineIRBuilder::validateTruncExt(unsigned Dst, unsigned Src,
645                                         bool IsExtend) {
646 #ifndef NDEBUG
647   LLT SrcTy = MRI->getType(Src);
648   LLT DstTy = MRI->getType(Dst);
649 
650   if (DstTy.isVector()) {
651     assert(SrcTy.isVector() && "mismatched cast between vecot and non-vector");
652     assert(SrcTy.getNumElements() == DstTy.getNumElements() &&
653            "different number of elements in a trunc/ext");
654   } else
655     assert(DstTy.isScalar() && SrcTy.isScalar() && "invalid extend/trunc");
656 
657   if (IsExtend)
658     assert(DstTy.getSizeInBits() > SrcTy.getSizeInBits() &&
659            "invalid narrowing extend");
660   else
661     assert(DstTy.getSizeInBits() < SrcTy.getSizeInBits() &&
662            "invalid widening trunc");
663 #endif
664 }
665