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
87 MachineIRBuilder::buildDirectDbgValue(unsigned Reg, const MDNode *Variable,
88                                       const MDNode *Expr) {
89   assert(isa<DILocalVariable>(Variable) && "not a variable");
90   assert(cast<DIExpression>(Expr)->isValid() && "not an expression");
91   assert(cast<DILocalVariable>(Variable)->isValidLocationForIntrinsic(DL) &&
92          "Expected inlined-at fields to agree");
93   return insertInstr(BuildMI(getMF(), DL, getTII().get(TargetOpcode::DBG_VALUE),
94                              /*IsIndirect*/ false, Reg, Variable, Expr));
95 }
96 
97 MachineInstrBuilder
98 MachineIRBuilder::buildIndirectDbgValue(unsigned Reg, const MDNode *Variable,
99                                         const MDNode *Expr) {
100   assert(isa<DILocalVariable>(Variable) && "not a variable");
101   assert(cast<DIExpression>(Expr)->isValid() && "not an expression");
102   assert(cast<DILocalVariable>(Variable)->isValidLocationForIntrinsic(DL) &&
103          "Expected inlined-at fields to agree");
104   return insertInstr(BuildMI(getMF(), DL, getTII().get(TargetOpcode::DBG_VALUE),
105                              /*IsIndirect*/ true, Reg, Variable, Expr));
106 }
107 
108 MachineInstrBuilder MachineIRBuilder::buildFIDbgValue(int FI,
109                                                       const MDNode *Variable,
110                                                       const MDNode *Expr) {
111   assert(isa<DILocalVariable>(Variable) && "not a variable");
112   assert(cast<DIExpression>(Expr)->isValid() && "not an expression");
113   assert(cast<DILocalVariable>(Variable)->isValidLocationForIntrinsic(DL) &&
114          "Expected inlined-at fields to agree");
115   return buildInstr(TargetOpcode::DBG_VALUE)
116       .addFrameIndex(FI)
117       .addImm(0)
118       .addMetadata(Variable)
119       .addMetadata(Expr);
120 }
121 
122 MachineInstrBuilder MachineIRBuilder::buildConstDbgValue(const Constant &C,
123                                                          const MDNode *Variable,
124                                                          const MDNode *Expr) {
125   assert(isa<DILocalVariable>(Variable) && "not a variable");
126   assert(cast<DIExpression>(Expr)->isValid() && "not an expression");
127   assert(cast<DILocalVariable>(Variable)->isValidLocationForIntrinsic(DL) &&
128          "Expected inlined-at fields to agree");
129   auto MIB = buildInstr(TargetOpcode::DBG_VALUE);
130   if (auto *CI = dyn_cast<ConstantInt>(&C)) {
131     if (CI->getBitWidth() > 64)
132       MIB.addCImm(CI);
133     else
134       MIB.addImm(CI->getZExtValue());
135   } else if (auto *CFP = dyn_cast<ConstantFP>(&C)) {
136     MIB.addFPImm(CFP);
137   } else {
138     // Insert %noreg if we didn't find a usable constant and had to drop it.
139     MIB.addReg(0U);
140   }
141 
142   return MIB.addImm(0).addMetadata(Variable).addMetadata(Expr);
143 }
144 
145 MachineInstrBuilder MachineIRBuilder::buildFrameIndex(unsigned Res, int Idx) {
146   assert(MRI->getType(Res).isPointer() && "invalid operand type");
147   return buildInstr(TargetOpcode::G_FRAME_INDEX)
148       .addDef(Res)
149       .addFrameIndex(Idx);
150 }
151 
152 MachineInstrBuilder MachineIRBuilder::buildGlobalValue(unsigned Res,
153                                                        const GlobalValue *GV) {
154   assert(MRI->getType(Res).isPointer() && "invalid operand type");
155   assert(MRI->getType(Res).getAddressSpace() ==
156              GV->getType()->getAddressSpace() &&
157          "address space mismatch");
158 
159   return buildInstr(TargetOpcode::G_GLOBAL_VALUE)
160       .addDef(Res)
161       .addGlobalAddress(GV);
162 }
163 
164 MachineInstrBuilder MachineIRBuilder::buildBinaryOp(unsigned Opcode, unsigned Res, unsigned Op0,
165                                                unsigned Op1) {
166   assert((MRI->getType(Res).isScalar() || MRI->getType(Res).isVector()) &&
167          "invalid operand type");
168   assert(MRI->getType(Res) == MRI->getType(Op0) &&
169          MRI->getType(Res) == MRI->getType(Op1) && "type mismatch");
170 
171   return buildInstr(Opcode)
172       .addDef(Res)
173       .addUse(Op0)
174       .addUse(Op1);
175 }
176 
177 MachineInstrBuilder MachineIRBuilder::buildAdd(unsigned Res, unsigned Op0,
178                                                unsigned Op1) {
179   return buildBinaryOp(TargetOpcode::G_ADD, Res, Op0, 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   return buildBinaryOp(TargetOpcode::G_SUB, Res, Op0, Op1);
226 }
227 
228 MachineInstrBuilder MachineIRBuilder::buildMul(unsigned Res, unsigned Op0,
229                                                unsigned Op1) {
230   return buildBinaryOp(TargetOpcode::G_MUL, Res, Op0, Op1);
231 }
232 
233 MachineInstrBuilder MachineIRBuilder::buildAnd(unsigned Res, unsigned Op0,
234                                                unsigned Op1) {
235   return buildBinaryOp(TargetOpcode::G_AND, Res, Op0, Op1);
236 }
237 
238 MachineInstrBuilder MachineIRBuilder::buildOr(unsigned Res, unsigned Op0,
239                                               unsigned Op1) {
240   return buildBinaryOp(TargetOpcode::G_OR, Res, Op0, Op1);
241 }
242 
243 MachineInstrBuilder MachineIRBuilder::buildBr(MachineBasicBlock &Dest) {
244   return buildInstr(TargetOpcode::G_BR).addMBB(&Dest);
245 }
246 
247 MachineInstrBuilder MachineIRBuilder::buildBrIndirect(unsigned Tgt) {
248   assert(MRI->getType(Tgt).isPointer() && "invalid branch destination");
249   return buildInstr(TargetOpcode::G_BRINDIRECT).addUse(Tgt);
250 }
251 
252 MachineInstrBuilder MachineIRBuilder::buildCopy(unsigned Res, unsigned Op) {
253   assert(MRI->getType(Res) == LLT() || MRI->getType(Op) == LLT() ||
254          MRI->getType(Res) == MRI->getType(Op));
255   return buildInstr(TargetOpcode::COPY).addDef(Res).addUse(Op);
256 }
257 
258 MachineInstrBuilder MachineIRBuilder::buildConstant(unsigned Res,
259                                                     const ConstantInt &Val) {
260   LLT Ty = MRI->getType(Res);
261 
262   assert((Ty.isScalar() || Ty.isPointer()) && "invalid operand type");
263 
264   const ConstantInt *NewVal = &Val;
265   if (Ty.getSizeInBits() != Val.getBitWidth())
266     NewVal = ConstantInt::get(MF->getFunction()->getContext(),
267                               Val.getValue().sextOrTrunc(Ty.getSizeInBits()));
268 
269   return buildInstr(TargetOpcode::G_CONSTANT).addDef(Res).addCImm(NewVal);
270 }
271 
272 MachineInstrBuilder MachineIRBuilder::buildConstant(unsigned Res,
273                                                     int64_t Val) {
274   auto IntN = IntegerType::get(MF->getFunction()->getContext(),
275                                MRI->getType(Res).getSizeInBits());
276   ConstantInt *CI = ConstantInt::get(IntN, Val, true);
277   return buildConstant(Res, *CI);
278 }
279 
280 MachineInstrBuilder MachineIRBuilder::buildFConstant(unsigned Res,
281                                                      const ConstantFP &Val) {
282   assert(MRI->getType(Res).isScalar() && "invalid operand type");
283 
284   return buildInstr(TargetOpcode::G_FCONSTANT).addDef(Res).addFPImm(&Val);
285 }
286 
287 MachineInstrBuilder MachineIRBuilder::buildBrCond(unsigned Tst,
288                                                   MachineBasicBlock &Dest) {
289   assert(MRI->getType(Tst).isScalar() && "invalid operand type");
290 
291   return buildInstr(TargetOpcode::G_BRCOND).addUse(Tst).addMBB(&Dest);
292 }
293 
294 MachineInstrBuilder MachineIRBuilder::buildLoad(unsigned Res, unsigned Addr,
295                                                 MachineMemOperand &MMO) {
296   assert(MRI->getType(Res).isValid() && "invalid operand type");
297   assert(MRI->getType(Addr).isPointer() && "invalid operand type");
298 
299   return buildInstr(TargetOpcode::G_LOAD)
300       .addDef(Res)
301       .addUse(Addr)
302       .addMemOperand(&MMO);
303 }
304 
305 MachineInstrBuilder MachineIRBuilder::buildStore(unsigned Val, unsigned Addr,
306                                                  MachineMemOperand &MMO) {
307   assert(MRI->getType(Val).isValid() && "invalid operand type");
308   assert(MRI->getType(Addr).isPointer() && "invalid operand type");
309 
310   return buildInstr(TargetOpcode::G_STORE)
311       .addUse(Val)
312       .addUse(Addr)
313       .addMemOperand(&MMO);
314 }
315 
316 MachineInstrBuilder MachineIRBuilder::buildUAdde(unsigned Res,
317                                                  unsigned CarryOut,
318                                                  unsigned Op0, unsigned Op1,
319                                                  unsigned CarryIn) {
320   assert(MRI->getType(Res).isScalar() && "invalid operand type");
321   assert(MRI->getType(Res) == MRI->getType(Op0) &&
322          MRI->getType(Res) == MRI->getType(Op1) && "type mismatch");
323   assert(MRI->getType(CarryOut).isScalar() && "invalid operand type");
324   assert(MRI->getType(CarryOut) == MRI->getType(CarryIn) && "type mismatch");
325 
326   return buildInstr(TargetOpcode::G_UADDE)
327       .addDef(Res)
328       .addDef(CarryOut)
329       .addUse(Op0)
330       .addUse(Op1)
331       .addUse(CarryIn);
332 }
333 
334 MachineInstrBuilder MachineIRBuilder::buildAnyExt(unsigned Res, unsigned Op) {
335   validateTruncExt(Res, Op, true);
336   return buildInstr(TargetOpcode::G_ANYEXT).addDef(Res).addUse(Op);
337 }
338 
339 MachineInstrBuilder MachineIRBuilder::buildSExt(unsigned Res, unsigned Op) {
340   validateTruncExt(Res, Op, true);
341   return buildInstr(TargetOpcode::G_SEXT).addDef(Res).addUse(Op);
342 }
343 
344 MachineInstrBuilder MachineIRBuilder::buildZExt(unsigned Res, unsigned Op) {
345   validateTruncExt(Res, Op, true);
346   return buildInstr(TargetOpcode::G_ZEXT).addDef(Res).addUse(Op);
347 }
348 
349 MachineInstrBuilder MachineIRBuilder::buildSExtOrTrunc(unsigned Res,
350                                                        unsigned Op) {
351   assert(MRI->getType(Res).isScalar() || MRI->getType(Res).isVector());
352   assert(MRI->getType(Res).isScalar() == MRI->getType(Op).isScalar());
353 
354   unsigned Opcode = TargetOpcode::COPY;
355   if (MRI->getType(Res).getSizeInBits() > MRI->getType(Op).getSizeInBits())
356     Opcode = TargetOpcode::G_SEXT;
357   else if (MRI->getType(Res).getSizeInBits() < MRI->getType(Op).getSizeInBits())
358     Opcode = TargetOpcode::G_TRUNC;
359   else
360     assert(MRI->getType(Res) == MRI->getType(Op));
361 
362   return buildInstr(Opcode).addDef(Res).addUse(Op);
363 }
364 
365 MachineInstrBuilder MachineIRBuilder::buildZExtOrTrunc(unsigned Res,
366                                                        unsigned Op) {
367   assert(MRI->getType(Res).isScalar() || MRI->getType(Res).isVector());
368   assert(MRI->getType(Res).isScalar() == MRI->getType(Op).isScalar());
369 
370   unsigned Opcode = TargetOpcode::COPY;
371   if (MRI->getType(Res).getSizeInBits() > MRI->getType(Op).getSizeInBits())
372     Opcode = TargetOpcode::G_ZEXT;
373   else if (MRI->getType(Res).getSizeInBits() < MRI->getType(Op).getSizeInBits())
374     Opcode = TargetOpcode::G_TRUNC;
375   else
376     assert(MRI->getType(Res) == MRI->getType(Op));
377 
378   return buildInstr(Opcode).addDef(Res).addUse(Op);
379 }
380 
381 MachineInstrBuilder MachineIRBuilder::buildCast(unsigned Dst, unsigned Src) {
382   LLT SrcTy = MRI->getType(Src);
383   LLT DstTy = MRI->getType(Dst);
384   if (SrcTy == DstTy)
385     return buildCopy(Dst, Src);
386 
387   unsigned Opcode;
388   if (SrcTy.isPointer() && DstTy.isScalar())
389     Opcode = TargetOpcode::G_PTRTOINT;
390   else if (DstTy.isPointer() && SrcTy.isScalar())
391     Opcode = TargetOpcode::G_INTTOPTR;
392   else {
393     assert(!SrcTy.isPointer() && !DstTy.isPointer() && "n G_ADDRCAST yet");
394     Opcode = TargetOpcode::G_BITCAST;
395   }
396 
397   return buildInstr(Opcode).addDef(Dst).addUse(Src);
398 }
399 
400 MachineInstrBuilder MachineIRBuilder::buildExtract(unsigned Res, unsigned Src,
401                                                    uint64_t Index) {
402 #ifndef NDEBUG
403   assert(MRI->getType(Src).isValid() && "invalid operand type");
404   assert(MRI->getType(Res).isValid() && "invalid operand type");
405   assert(Index + MRI->getType(Res).getSizeInBits() <=
406              MRI->getType(Src).getSizeInBits() &&
407          "extracting off end of register");
408 #endif
409 
410   if (MRI->getType(Res).getSizeInBits() == MRI->getType(Src).getSizeInBits()) {
411     assert(Index == 0 && "insertion past the end of a register");
412     return buildCast(Res, Src);
413   }
414 
415   return buildInstr(TargetOpcode::G_EXTRACT)
416       .addDef(Res)
417       .addUse(Src)
418       .addImm(Index);
419 }
420 
421 void MachineIRBuilder::buildSequence(unsigned Res, ArrayRef<unsigned> Ops,
422                                      ArrayRef<uint64_t> Indices) {
423 #ifndef NDEBUG
424   assert(Ops.size() == Indices.size() && "incompatible args");
425   assert(!Ops.empty() && "invalid trivial sequence");
426   assert(std::is_sorted(Indices.begin(), Indices.end()) &&
427          "sequence offsets must be in ascending order");
428 
429   assert(MRI->getType(Res).isValid() && "invalid operand type");
430   for (auto Op : Ops)
431     assert(MRI->getType(Op).isValid() && "invalid operand type");
432 #endif
433 
434   LLT ResTy = MRI->getType(Res);
435   LLT OpTy = MRI->getType(Ops[0]);
436   unsigned OpSize = OpTy.getSizeInBits();
437   bool MaybeMerge = true;
438   for (unsigned i = 0; i < Ops.size(); ++i) {
439     if (MRI->getType(Ops[i]) != OpTy || Indices[i] != i * OpSize) {
440       MaybeMerge = false;
441       break;
442     }
443   }
444 
445   if (MaybeMerge && Ops.size() * OpSize == ResTy.getSizeInBits()) {
446     buildMerge(Res, Ops);
447     return;
448   }
449 
450   unsigned ResIn = MRI->createGenericVirtualRegister(ResTy);
451   buildUndef(ResIn);
452 
453   for (unsigned i = 0; i < Ops.size(); ++i) {
454     unsigned ResOut =
455         i + 1 == Ops.size() ? Res : MRI->createGenericVirtualRegister(ResTy);
456     buildInsert(ResOut, ResIn, Ops[i], Indices[i]);
457     ResIn = ResOut;
458   }
459 }
460 
461 MachineInstrBuilder MachineIRBuilder::buildUndef(unsigned Res) {
462   return buildInstr(TargetOpcode::G_IMPLICIT_DEF).addDef(Res);
463 }
464 
465 MachineInstrBuilder MachineIRBuilder::buildMerge(unsigned Res,
466                                                  ArrayRef<unsigned> Ops) {
467 
468 #ifndef NDEBUG
469   assert(!Ops.empty() && "invalid trivial sequence");
470   LLT Ty = MRI->getType(Ops[0]);
471   for (auto Reg : Ops)
472     assert(MRI->getType(Reg) == Ty && "type mismatch in input list");
473   assert(Ops.size() * MRI->getType(Ops[0]).getSizeInBits() ==
474              MRI->getType(Res).getSizeInBits() &&
475          "input operands do not cover output register");
476 #endif
477 
478   if (Ops.size() == 1)
479     return buildCast(Res, Ops[0]);
480 
481   MachineInstrBuilder MIB = buildInstr(TargetOpcode::G_MERGE_VALUES);
482   MIB.addDef(Res);
483   for (unsigned i = 0; i < Ops.size(); ++i)
484     MIB.addUse(Ops[i]);
485   return MIB;
486 }
487 
488 MachineInstrBuilder MachineIRBuilder::buildUnmerge(ArrayRef<unsigned> Res,
489                                                    unsigned Op) {
490 
491 #ifndef NDEBUG
492   assert(!Res.empty() && "invalid trivial sequence");
493   LLT Ty = MRI->getType(Res[0]);
494   for (auto Reg : Res)
495     assert(MRI->getType(Reg) == Ty && "type mismatch in input list");
496   assert(Res.size() * MRI->getType(Res[0]).getSizeInBits() ==
497              MRI->getType(Op).getSizeInBits() &&
498          "input operands do not cover output register");
499 #endif
500 
501   MachineInstrBuilder MIB = buildInstr(TargetOpcode::G_UNMERGE_VALUES);
502   for (unsigned i = 0; i < Res.size(); ++i)
503     MIB.addDef(Res[i]);
504   MIB.addUse(Op);
505   return MIB;
506 }
507 
508 MachineInstrBuilder MachineIRBuilder::buildInsert(unsigned Res, unsigned Src,
509                                                   unsigned Op, unsigned Index) {
510   assert(Index + MRI->getType(Op).getSizeInBits() <=
511              MRI->getType(Res).getSizeInBits() &&
512          "insertion past the end of a register");
513 
514   if (MRI->getType(Res).getSizeInBits() == MRI->getType(Op).getSizeInBits()) {
515     return buildCast(Res, Op);
516   }
517 
518   return buildInstr(TargetOpcode::G_INSERT)
519       .addDef(Res)
520       .addUse(Src)
521       .addUse(Op)
522       .addImm(Index);
523 }
524 
525 MachineInstrBuilder MachineIRBuilder::buildIntrinsic(Intrinsic::ID ID,
526                                                      unsigned Res,
527                                                      bool HasSideEffects) {
528   auto MIB =
529       buildInstr(HasSideEffects ? TargetOpcode::G_INTRINSIC_W_SIDE_EFFECTS
530                                 : TargetOpcode::G_INTRINSIC);
531   if (Res)
532     MIB.addDef(Res);
533   MIB.addIntrinsicID(ID);
534   return MIB;
535 }
536 
537 MachineInstrBuilder MachineIRBuilder::buildTrunc(unsigned Res, unsigned Op) {
538   validateTruncExt(Res, Op, false);
539   return buildInstr(TargetOpcode::G_TRUNC).addDef(Res).addUse(Op);
540 }
541 
542 MachineInstrBuilder MachineIRBuilder::buildFPTrunc(unsigned Res, unsigned Op) {
543   validateTruncExt(Res, Op, false);
544   return buildInstr(TargetOpcode::G_FPTRUNC).addDef(Res).addUse(Op);
545 }
546 
547 MachineInstrBuilder MachineIRBuilder::buildICmp(CmpInst::Predicate Pred,
548                                                 unsigned Res, unsigned Op0,
549                                                 unsigned Op1) {
550 #ifndef NDEBUG
551   assert(MRI->getType(Op0) == MRI->getType(Op0) && "type mismatch");
552   assert(CmpInst::isIntPredicate(Pred) && "invalid predicate");
553   if (MRI->getType(Op0).isScalar() || MRI->getType(Op0).isPointer())
554     assert(MRI->getType(Res).isScalar() && "type mismatch");
555   else
556     assert(MRI->getType(Res).isVector() &&
557            MRI->getType(Res).getNumElements() ==
558                MRI->getType(Op0).getNumElements() &&
559            "type mismatch");
560 #endif
561 
562   return buildInstr(TargetOpcode::G_ICMP)
563       .addDef(Res)
564       .addPredicate(Pred)
565       .addUse(Op0)
566       .addUse(Op1);
567 }
568 
569 MachineInstrBuilder MachineIRBuilder::buildFCmp(CmpInst::Predicate Pred,
570                                                 unsigned Res, unsigned Op0,
571                                                 unsigned Op1) {
572 #ifndef NDEBUG
573   assert((MRI->getType(Op0).isScalar() || MRI->getType(Op0).isVector()) &&
574          "invalid operand type");
575   assert(MRI->getType(Op0) == MRI->getType(Op1) && "type mismatch");
576   assert(CmpInst::isFPPredicate(Pred) && "invalid predicate");
577   if (MRI->getType(Op0).isScalar())
578     assert(MRI->getType(Res).isScalar() && "type mismatch");
579   else
580     assert(MRI->getType(Res).isVector() &&
581            MRI->getType(Res).getNumElements() ==
582                MRI->getType(Op0).getNumElements() &&
583            "type mismatch");
584 #endif
585 
586   return buildInstr(TargetOpcode::G_FCMP)
587       .addDef(Res)
588       .addPredicate(Pred)
589       .addUse(Op0)
590       .addUse(Op1);
591 }
592 
593 MachineInstrBuilder MachineIRBuilder::buildSelect(unsigned Res, unsigned Tst,
594                                                   unsigned Op0, unsigned Op1) {
595 #ifndef NDEBUG
596   LLT ResTy = MRI->getType(Res);
597   assert((ResTy.isScalar() || ResTy.isVector() || ResTy.isPointer()) &&
598          "invalid operand type");
599   assert(ResTy == MRI->getType(Op0) && ResTy == MRI->getType(Op1) &&
600          "type mismatch");
601   if (ResTy.isScalar() || ResTy.isPointer())
602     assert(MRI->getType(Tst).isScalar() && "type mismatch");
603   else
604     assert((MRI->getType(Tst).isScalar() ||
605             (MRI->getType(Tst).isVector() &&
606              MRI->getType(Tst).getNumElements() ==
607                  MRI->getType(Op0).getNumElements())) &&
608            "type mismatch");
609 #endif
610 
611   return buildInstr(TargetOpcode::G_SELECT)
612       .addDef(Res)
613       .addUse(Tst)
614       .addUse(Op0)
615       .addUse(Op1);
616 }
617 
618 MachineInstrBuilder MachineIRBuilder::buildInsertVectorElement(unsigned Res,
619                                                                unsigned Val,
620                                                                unsigned Elt,
621                                                                unsigned Idx) {
622 #ifndef NDEBUG
623   LLT ResTy = MRI->getType(Res);
624   LLT ValTy = MRI->getType(Val);
625   LLT EltTy = MRI->getType(Elt);
626   LLT IdxTy = MRI->getType(Idx);
627   assert(ResTy.isVector() && ValTy.isVector() && "invalid operand type");
628   assert(IdxTy.isScalar() && "invalid operand type");
629   assert(ResTy.getNumElements() == ValTy.getNumElements() && "type mismatch");
630   assert(ResTy.getElementType() == EltTy && "type mismatch");
631 #endif
632 
633   return buildInstr(TargetOpcode::G_INSERT_VECTOR_ELT)
634       .addDef(Res)
635       .addUse(Val)
636       .addUse(Elt)
637       .addUse(Idx);
638 }
639 
640 MachineInstrBuilder MachineIRBuilder::buildExtractVectorElement(unsigned Res,
641                                                                 unsigned Val,
642                                                                 unsigned Idx) {
643 #ifndef NDEBUG
644   LLT ResTy = MRI->getType(Res);
645   LLT ValTy = MRI->getType(Val);
646   LLT IdxTy = MRI->getType(Idx);
647   assert(ValTy.isVector() && "invalid operand type");
648   assert((ResTy.isScalar() || ResTy.isPointer()) && "invalid operand type");
649   assert(IdxTy.isScalar() && "invalid operand type");
650   assert(ValTy.getElementType() == ResTy && "type mismatch");
651 #endif
652 
653   return buildInstr(TargetOpcode::G_EXTRACT_VECTOR_ELT)
654       .addDef(Res)
655       .addUse(Val)
656       .addUse(Idx);
657 }
658 
659 void MachineIRBuilder::validateTruncExt(unsigned Dst, unsigned Src,
660                                         bool IsExtend) {
661 #ifndef NDEBUG
662   LLT SrcTy = MRI->getType(Src);
663   LLT DstTy = MRI->getType(Dst);
664 
665   if (DstTy.isVector()) {
666     assert(SrcTy.isVector() && "mismatched cast between vecot and non-vector");
667     assert(SrcTy.getNumElements() == DstTy.getNumElements() &&
668            "different number of elements in a trunc/ext");
669   } else
670     assert(DstTy.isScalar() && SrcTy.isScalar() && "invalid extend/trunc");
671 
672   if (IsExtend)
673     assert(DstTy.getSizeInBits() > SrcTy.getSizeInBits() &&
674            "invalid narrowing extend");
675   else
676     assert(DstTy.getSizeInBits() < SrcTy.getSizeInBits() &&
677            "invalid widening trunc");
678 #endif
679 }
680