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   assert(MRI->getType(Tgt).isPointer() && "invalid branch destination");
268   return buildInstr(TargetOpcode::G_BRINDIRECT).addUse(Tgt);
269 }
270 
271 MachineInstrBuilder MachineIRBuilder::buildCopy(unsigned Res, unsigned Op) {
272   assert(MRI->getType(Res) == LLT() || MRI->getType(Op) == LLT() ||
273          MRI->getType(Res) == MRI->getType(Op));
274   return buildInstr(TargetOpcode::COPY).addDef(Res).addUse(Op);
275 }
276 
277 MachineInstrBuilder MachineIRBuilder::buildConstant(unsigned Res,
278                                                     const ConstantInt &Val) {
279   LLT Ty = MRI->getType(Res);
280 
281   assert((Ty.isScalar() || Ty.isPointer()) && "invalid operand type");
282 
283   const ConstantInt *NewVal = &Val;
284   if (Ty.getSizeInBits() != Val.getBitWidth())
285     NewVal = ConstantInt::get(MF->getFunction()->getContext(),
286                               Val.getValue().sextOrTrunc(Ty.getSizeInBits()));
287 
288   return buildInstr(TargetOpcode::G_CONSTANT).addDef(Res).addCImm(NewVal);
289 }
290 
291 MachineInstrBuilder MachineIRBuilder::buildConstant(unsigned Res,
292                                                     int64_t Val) {
293   auto IntN = IntegerType::get(MF->getFunction()->getContext(),
294                                MRI->getType(Res).getSizeInBits());
295   ConstantInt *CI = ConstantInt::get(IntN, Val, true);
296   return buildConstant(Res, *CI);
297 }
298 
299 MachineInstrBuilder MachineIRBuilder::buildFConstant(unsigned Res,
300                                                      const ConstantFP &Val) {
301   assert(MRI->getType(Res).isScalar() && "invalid operand type");
302 
303   return buildInstr(TargetOpcode::G_FCONSTANT).addDef(Res).addFPImm(&Val);
304 }
305 
306 MachineInstrBuilder MachineIRBuilder::buildBrCond(unsigned Tst,
307                                                   MachineBasicBlock &Dest) {
308   assert(MRI->getType(Tst).isScalar() && "invalid operand type");
309 
310   return buildInstr(TargetOpcode::G_BRCOND).addUse(Tst).addMBB(&Dest);
311 }
312 
313 MachineInstrBuilder MachineIRBuilder::buildLoad(unsigned Res, unsigned Addr,
314                                                 MachineMemOperand &MMO) {
315   assert(MRI->getType(Res).isValid() && "invalid operand type");
316   assert(MRI->getType(Addr).isPointer() && "invalid operand type");
317 
318   return buildInstr(TargetOpcode::G_LOAD)
319       .addDef(Res)
320       .addUse(Addr)
321       .addMemOperand(&MMO);
322 }
323 
324 MachineInstrBuilder MachineIRBuilder::buildStore(unsigned Val, unsigned Addr,
325                                                  MachineMemOperand &MMO) {
326   assert(MRI->getType(Val).isValid() && "invalid operand type");
327   assert(MRI->getType(Addr).isPointer() && "invalid operand type");
328 
329   return buildInstr(TargetOpcode::G_STORE)
330       .addUse(Val)
331       .addUse(Addr)
332       .addMemOperand(&MMO);
333 }
334 
335 MachineInstrBuilder MachineIRBuilder::buildUAdde(unsigned Res,
336                                                  unsigned CarryOut,
337                                                  unsigned Op0, unsigned Op1,
338                                                  unsigned CarryIn) {
339   assert(MRI->getType(Res).isScalar() && "invalid operand type");
340   assert(MRI->getType(Res) == MRI->getType(Op0) &&
341          MRI->getType(Res) == MRI->getType(Op1) && "type mismatch");
342   assert(MRI->getType(CarryOut).isScalar() && "invalid operand type");
343   assert(MRI->getType(CarryOut) == MRI->getType(CarryIn) && "type mismatch");
344 
345   return buildInstr(TargetOpcode::G_UADDE)
346       .addDef(Res)
347       .addDef(CarryOut)
348       .addUse(Op0)
349       .addUse(Op1)
350       .addUse(CarryIn);
351 }
352 
353 MachineInstrBuilder MachineIRBuilder::buildAnyExt(unsigned Res, unsigned Op) {
354   validateTruncExt(Res, Op, true);
355   return buildInstr(TargetOpcode::G_ANYEXT).addDef(Res).addUse(Op);
356 }
357 
358 MachineInstrBuilder MachineIRBuilder::buildSExt(unsigned Res, unsigned Op) {
359   validateTruncExt(Res, Op, true);
360   return buildInstr(TargetOpcode::G_SEXT).addDef(Res).addUse(Op);
361 }
362 
363 MachineInstrBuilder MachineIRBuilder::buildZExt(unsigned Res, unsigned Op) {
364   validateTruncExt(Res, Op, true);
365   return buildInstr(TargetOpcode::G_ZEXT).addDef(Res).addUse(Op);
366 }
367 
368 MachineInstrBuilder MachineIRBuilder::buildSExtOrTrunc(unsigned Res,
369                                                        unsigned Op) {
370   assert(MRI->getType(Res).isScalar() || MRI->getType(Res).isVector());
371   assert(MRI->getType(Res).isScalar() == MRI->getType(Op).isScalar());
372 
373   unsigned Opcode = TargetOpcode::COPY;
374   if (MRI->getType(Res).getSizeInBits() > MRI->getType(Op).getSizeInBits())
375     Opcode = TargetOpcode::G_SEXT;
376   else if (MRI->getType(Res).getSizeInBits() < MRI->getType(Op).getSizeInBits())
377     Opcode = TargetOpcode::G_TRUNC;
378   else
379     assert(MRI->getType(Res) == MRI->getType(Op));
380 
381   return buildInstr(Opcode).addDef(Res).addUse(Op);
382 }
383 
384 MachineInstrBuilder MachineIRBuilder::buildZExtOrTrunc(unsigned Res,
385                                                        unsigned Op) {
386   assert(MRI->getType(Res).isScalar() || MRI->getType(Res).isVector());
387   assert(MRI->getType(Res).isScalar() == MRI->getType(Op).isScalar());
388 
389   unsigned Opcode = TargetOpcode::COPY;
390   if (MRI->getType(Res).getSizeInBits() > MRI->getType(Op).getSizeInBits())
391     Opcode = TargetOpcode::G_ZEXT;
392   else if (MRI->getType(Res).getSizeInBits() < MRI->getType(Op).getSizeInBits())
393     Opcode = TargetOpcode::G_TRUNC;
394   else
395     assert(MRI->getType(Res) == MRI->getType(Op));
396 
397   return buildInstr(Opcode).addDef(Res).addUse(Op);
398 }
399 
400 MachineInstrBuilder MachineIRBuilder::buildCast(unsigned Dst, unsigned Src) {
401   LLT SrcTy = MRI->getType(Src);
402   LLT DstTy = MRI->getType(Dst);
403   if (SrcTy == DstTy)
404     return buildCopy(Dst, Src);
405 
406   unsigned Opcode;
407   if (SrcTy.isPointer() && DstTy.isScalar())
408     Opcode = TargetOpcode::G_PTRTOINT;
409   else if (DstTy.isPointer() && SrcTy.isScalar())
410     Opcode = TargetOpcode::G_INTTOPTR;
411   else {
412     assert(!SrcTy.isPointer() && !DstTy.isPointer() && "n G_ADDRCAST yet");
413     Opcode = TargetOpcode::G_BITCAST;
414   }
415 
416   return buildInstr(Opcode).addDef(Dst).addUse(Src);
417 }
418 
419 MachineInstrBuilder MachineIRBuilder::buildExtract(unsigned Res, unsigned Src,
420                                                    uint64_t Index) {
421 #ifndef NDEBUG
422   assert(MRI->getType(Src).isValid() && "invalid operand type");
423   assert(MRI->getType(Res).isValid() && "invalid operand type");
424   assert(Index + MRI->getType(Res).getSizeInBits() <=
425              MRI->getType(Src).getSizeInBits() &&
426          "extracting off end of register");
427 #endif
428 
429   if (MRI->getType(Res).getSizeInBits() == MRI->getType(Src).getSizeInBits()) {
430     assert(Index == 0 && "insertion past the end of a register");
431     return buildCast(Res, Src);
432   }
433 
434   return buildInstr(TargetOpcode::G_EXTRACT)
435       .addDef(Res)
436       .addUse(Src)
437       .addImm(Index);
438 }
439 
440 void MachineIRBuilder::buildSequence(unsigned Res, ArrayRef<unsigned> Ops,
441                                      ArrayRef<uint64_t> Indices) {
442 #ifndef NDEBUG
443   assert(Ops.size() == Indices.size() && "incompatible args");
444   assert(!Ops.empty() && "invalid trivial sequence");
445   assert(std::is_sorted(Indices.begin(), Indices.end()) &&
446          "sequence offsets must be in ascending order");
447 
448   assert(MRI->getType(Res).isValid() && "invalid operand type");
449   for (auto Op : Ops)
450     assert(MRI->getType(Op).isValid() && "invalid operand type");
451 #endif
452 
453   LLT ResTy = MRI->getType(Res);
454   LLT OpTy = MRI->getType(Ops[0]);
455   unsigned OpSize = OpTy.getSizeInBits();
456   bool MaybeMerge = true;
457   for (unsigned i = 0; i < Ops.size(); ++i) {
458     if (MRI->getType(Ops[i]) != OpTy || Indices[i] != i * OpSize) {
459       MaybeMerge = false;
460       break;
461     }
462   }
463 
464   if (MaybeMerge && Ops.size() * OpSize == ResTy.getSizeInBits()) {
465     buildMerge(Res, Ops);
466     return;
467   }
468 
469   unsigned ResIn = MRI->createGenericVirtualRegister(ResTy);
470   buildUndef(ResIn);
471 
472   for (unsigned i = 0; i < Ops.size(); ++i) {
473     unsigned ResOut =
474         i + 1 == Ops.size() ? Res : MRI->createGenericVirtualRegister(ResTy);
475     buildInsert(ResOut, ResIn, Ops[i], Indices[i]);
476     ResIn = ResOut;
477   }
478 }
479 
480 MachineInstrBuilder MachineIRBuilder::buildUndef(unsigned Res) {
481   return buildInstr(TargetOpcode::IMPLICIT_DEF).addDef(Res);
482 }
483 
484 MachineInstrBuilder MachineIRBuilder::buildMerge(unsigned Res,
485                                                  ArrayRef<unsigned> Ops) {
486 
487 #ifndef NDEBUG
488   assert(!Ops.empty() && "invalid trivial sequence");
489   LLT Ty = MRI->getType(Ops[0]);
490   for (auto Reg : Ops)
491     assert(MRI->getType(Reg) == Ty && "type mismatch in input list");
492   assert(Ops.size() * MRI->getType(Ops[0]).getSizeInBits() ==
493              MRI->getType(Res).getSizeInBits() &&
494          "input operands do not cover output register");
495 #endif
496 
497   if (Ops.size() == 1)
498     return buildCast(Res, Ops[0]);
499 
500   MachineInstrBuilder MIB = buildInstr(TargetOpcode::G_MERGE_VALUES);
501   MIB.addDef(Res);
502   for (unsigned i = 0; i < Ops.size(); ++i)
503     MIB.addUse(Ops[i]);
504   return MIB;
505 }
506 
507 MachineInstrBuilder MachineIRBuilder::buildUnmerge(ArrayRef<unsigned> Res,
508                                                    unsigned Op) {
509 
510 #ifndef NDEBUG
511   assert(!Res.empty() && "invalid trivial sequence");
512   LLT Ty = MRI->getType(Res[0]);
513   for (auto Reg : Res)
514     assert(MRI->getType(Reg) == Ty && "type mismatch in input list");
515   assert(Res.size() * MRI->getType(Res[0]).getSizeInBits() ==
516              MRI->getType(Op).getSizeInBits() &&
517          "input operands do not cover output register");
518 #endif
519 
520   MachineInstrBuilder MIB = buildInstr(TargetOpcode::G_UNMERGE_VALUES);
521   for (unsigned i = 0; i < Res.size(); ++i)
522     MIB.addDef(Res[i]);
523   MIB.addUse(Op);
524   return MIB;
525 }
526 
527 MachineInstrBuilder MachineIRBuilder::buildInsert(unsigned Res, unsigned Src,
528                                                   unsigned Op, unsigned Index) {
529   assert(Index + MRI->getType(Op).getSizeInBits() <=
530              MRI->getType(Res).getSizeInBits() &&
531          "insertion past the end of a register");
532 
533   if (MRI->getType(Res).getSizeInBits() == MRI->getType(Op).getSizeInBits()) {
534     return buildCast(Res, Op);
535   }
536 
537   return buildInstr(TargetOpcode::G_INSERT)
538       .addDef(Res)
539       .addUse(Src)
540       .addUse(Op)
541       .addImm(Index);
542 }
543 
544 MachineInstrBuilder MachineIRBuilder::buildIntrinsic(Intrinsic::ID ID,
545                                                      unsigned Res,
546                                                      bool HasSideEffects) {
547   auto MIB =
548       buildInstr(HasSideEffects ? TargetOpcode::G_INTRINSIC_W_SIDE_EFFECTS
549                                 : TargetOpcode::G_INTRINSIC);
550   if (Res)
551     MIB.addDef(Res);
552   MIB.addIntrinsicID(ID);
553   return MIB;
554 }
555 
556 MachineInstrBuilder MachineIRBuilder::buildTrunc(unsigned Res, unsigned Op) {
557   validateTruncExt(Res, Op, false);
558   return buildInstr(TargetOpcode::G_TRUNC).addDef(Res).addUse(Op);
559 }
560 
561 MachineInstrBuilder MachineIRBuilder::buildFPTrunc(unsigned Res, unsigned Op) {
562   validateTruncExt(Res, Op, false);
563   return buildInstr(TargetOpcode::G_FPTRUNC).addDef(Res).addUse(Op);
564 }
565 
566 MachineInstrBuilder MachineIRBuilder::buildICmp(CmpInst::Predicate Pred,
567                                                 unsigned Res, unsigned Op0,
568                                                 unsigned Op1) {
569 #ifndef NDEBUG
570   assert(MRI->getType(Op0) == MRI->getType(Op0) && "type mismatch");
571   assert(CmpInst::isIntPredicate(Pred) && "invalid predicate");
572   if (MRI->getType(Op0).isScalar() || MRI->getType(Op0).isPointer())
573     assert(MRI->getType(Res).isScalar() && "type mismatch");
574   else
575     assert(MRI->getType(Res).isVector() &&
576            MRI->getType(Res).getNumElements() ==
577                MRI->getType(Op0).getNumElements() &&
578            "type mismatch");
579 #endif
580 
581   return buildInstr(TargetOpcode::G_ICMP)
582       .addDef(Res)
583       .addPredicate(Pred)
584       .addUse(Op0)
585       .addUse(Op1);
586 }
587 
588 MachineInstrBuilder MachineIRBuilder::buildFCmp(CmpInst::Predicate Pred,
589                                                 unsigned Res, unsigned Op0,
590                                                 unsigned Op1) {
591 #ifndef NDEBUG
592   assert((MRI->getType(Op0).isScalar() || MRI->getType(Op0).isVector()) &&
593          "invalid operand type");
594   assert(MRI->getType(Op0) == MRI->getType(Op1) && "type mismatch");
595   assert(CmpInst::isFPPredicate(Pred) && "invalid predicate");
596   if (MRI->getType(Op0).isScalar())
597     assert(MRI->getType(Res).isScalar() && "type mismatch");
598   else
599     assert(MRI->getType(Res).isVector() &&
600            MRI->getType(Res).getNumElements() ==
601                MRI->getType(Op0).getNumElements() &&
602            "type mismatch");
603 #endif
604 
605   return buildInstr(TargetOpcode::G_FCMP)
606       .addDef(Res)
607       .addPredicate(Pred)
608       .addUse(Op0)
609       .addUse(Op1);
610 }
611 
612 MachineInstrBuilder MachineIRBuilder::buildSelect(unsigned Res, unsigned Tst,
613                                                   unsigned Op0, unsigned Op1) {
614 #ifndef NDEBUG
615   LLT ResTy = MRI->getType(Res);
616   assert((ResTy.isScalar() || ResTy.isVector() || ResTy.isPointer()) &&
617          "invalid operand type");
618   assert(ResTy == MRI->getType(Op0) && ResTy == MRI->getType(Op1) &&
619          "type mismatch");
620   if (ResTy.isScalar() || ResTy.isPointer())
621     assert(MRI->getType(Tst).isScalar() && "type mismatch");
622   else
623     assert((MRI->getType(Tst).isScalar() ||
624             (MRI->getType(Tst).isVector() &&
625              MRI->getType(Tst).getNumElements() ==
626                  MRI->getType(Op0).getNumElements())) &&
627            "type mismatch");
628 #endif
629 
630   return buildInstr(TargetOpcode::G_SELECT)
631       .addDef(Res)
632       .addUse(Tst)
633       .addUse(Op0)
634       .addUse(Op1);
635 }
636 
637 MachineInstrBuilder MachineIRBuilder::buildInsertVectorElement(unsigned Res,
638                                                                unsigned Val,
639                                                                unsigned Elt,
640                                                                unsigned Idx) {
641 #ifndef NDEBUG
642   LLT ResTy = MRI->getType(Res);
643   LLT ValTy = MRI->getType(Val);
644   LLT EltTy = MRI->getType(Elt);
645   LLT IdxTy = MRI->getType(Idx);
646   assert(ResTy.isVector() && ValTy.isVector() && "invalid operand type");
647   assert(IdxTy.isScalar() && "invalid operand type");
648   assert(ResTy.getNumElements() == ValTy.getNumElements() && "type mismatch");
649   assert(ResTy.getElementType() == EltTy && "type mismatch");
650 #endif
651 
652   return buildInstr(TargetOpcode::G_INSERT_VECTOR_ELT)
653       .addDef(Res)
654       .addUse(Val)
655       .addUse(Elt)
656       .addUse(Idx);
657 }
658 
659 MachineInstrBuilder MachineIRBuilder::buildExtractVectorElement(unsigned Res,
660                                                                 unsigned Val,
661                                                                 unsigned Idx) {
662 #ifndef NDEBUG
663   LLT ResTy = MRI->getType(Res);
664   LLT ValTy = MRI->getType(Val);
665   LLT IdxTy = MRI->getType(Idx);
666   assert(ValTy.isVector() && "invalid operand type");
667   assert((ResTy.isScalar() || ResTy.isPointer()) && "invalid operand type");
668   assert(IdxTy.isScalar() && "invalid operand type");
669   assert(ValTy.getElementType() == ResTy && "type mismatch");
670 #endif
671 
672   return buildInstr(TargetOpcode::G_EXTRACT_VECTOR_ELT)
673       .addDef(Res)
674       .addUse(Val)
675       .addUse(Idx);
676 }
677 
678 void MachineIRBuilder::validateTruncExt(unsigned Dst, unsigned Src,
679                                         bool IsExtend) {
680 #ifndef NDEBUG
681   LLT SrcTy = MRI->getType(Src);
682   LLT DstTy = MRI->getType(Dst);
683 
684   if (DstTy.isVector()) {
685     assert(SrcTy.isVector() && "mismatched cast between vecot and non-vector");
686     assert(SrcTy.getNumElements() == DstTy.getNumElements() &&
687            "different number of elements in a trunc/ext");
688   } else
689     assert(DstTy.isScalar() && SrcTy.isScalar() && "invalid extend/trunc");
690 
691   if (IsExtend)
692     assert(DstTy.getSizeInBits() > SrcTy.getSizeInBits() &&
693            "invalid narrowing extend");
694   else
695     assert(DstTy.getSizeInBits() < SrcTy.getSizeInBits() &&
696            "invalid widening trunc");
697 #endif
698 }
699