1 //===- llvm/InstrTypes.h - Important Instruction subclasses -----*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines various meta classes of instructions that exist in the VM
11 // representation. Specific concrete subclasses of these may be found in the
14 //===----------------------------------------------------------------------===//
16 #ifndef LLVM_IR_INSTRTYPES_H
17 #define LLVM_IR_INSTRTYPES_H
19 #include "llvm/ADT/ArrayRef.h"
20 #include "llvm/ADT/None.h"
21 #include "llvm/ADT/Optional.h"
22 #include "llvm/ADT/STLExtras.h"
23 #include "llvm/ADT/StringMap.h"
24 #include "llvm/ADT/StringRef.h"
25 #include "llvm/ADT/Twine.h"
26 #include "llvm/ADT/iterator_range.h"
27 #include "llvm/IR/Attributes.h"
28 #include "llvm/IR/Constants.h"
29 #include "llvm/IR/DerivedTypes.h"
30 #include "llvm/IR/Instruction.h"
31 #include "llvm/IR/LLVMContext.h"
32 #include "llvm/IR/OperandTraits.h"
33 #include "llvm/IR/Type.h"
34 #include "llvm/IR/User.h"
35 #include "llvm/IR/Value.h"
36 #include "llvm/Support/Casting.h"
37 #include "llvm/Support/ErrorHandling.h"
48 //===----------------------------------------------------------------------===//
49 // TerminatorInst Class
50 //===----------------------------------------------------------------------===//
52 /// Subclasses of this class are all able to terminate a basic
53 /// block. Thus, these are all the flow control type of operations.
55 class TerminatorInst : public Instruction {
57 TerminatorInst(Type *Ty, Instruction::TermOps iType,
58 Use *Ops, unsigned NumOps,
59 Instruction *InsertBefore = nullptr)
60 : Instruction(Ty, iType, Ops, NumOps, InsertBefore) {}
62 TerminatorInst(Type *Ty, Instruction::TermOps iType,
63 Use *Ops, unsigned NumOps, BasicBlock *InsertAtEnd)
64 : Instruction(Ty, iType, Ops, NumOps, InsertAtEnd) {}
67 /// Return the number of successors that this terminator has.
68 unsigned getNumSuccessors() const;
70 /// Return the specified successor.
71 BasicBlock *getSuccessor(unsigned idx) const;
73 /// Update the specified successor to point at the provided block.
74 void setSuccessor(unsigned idx, BasicBlock *B);
76 // Methods for support type inquiry through isa, cast, and dyn_cast:
77 static bool classof(const Instruction *I) {
78 return I->isTerminator();
80 static bool classof(const Value *V) {
81 return isa<Instruction>(V) && classof(cast<Instruction>(V));
84 // Returns true if this terminator relates to exception handling.
85 bool isExceptional() const {
86 switch (getOpcode()) {
87 case Instruction::CatchSwitch:
88 case Instruction::CatchRet:
89 case Instruction::CleanupRet:
90 case Instruction::Invoke:
91 case Instruction::Resume:
98 //===--------------------------------------------------------------------===//
99 // succ_iterator definition
100 //===--------------------------------------------------------------------===//
102 template <class Term, class BB> // Successor Iterator
103 class SuccIterator : public std::iterator<std::random_access_iterator_tag, BB,
106 std::iterator<std::random_access_iterator_tag, BB, int, BB *, BB *>;
109 using pointer = typename super::pointer;
110 using reference = typename super::reference;
115 using Self = SuccIterator<Term, BB>;
117 inline bool index_is_valid(unsigned idx) {
118 return idx < TermInst->getNumSuccessors();
121 /// Proxy object to allow write access in operator[]
122 class SuccessorProxy {
126 explicit SuccessorProxy(const Self &it) : it(it) {}
128 SuccessorProxy(const SuccessorProxy &) = default;
130 SuccessorProxy &operator=(SuccessorProxy r) {
131 *this = reference(r);
135 SuccessorProxy &operator=(reference r) {
136 it.TermInst->setSuccessor(it.idx, r);
140 operator reference() const { return *it; }
145 explicit inline SuccIterator(Term T) : TermInst(T), idx(0) {}
147 inline SuccIterator(Term T, bool) : TermInst(T) {
149 idx = TermInst->getNumSuccessors();
151 // Term == NULL happens, if a basic block is not fully constructed and
152 // consequently getTerminator() returns NULL. In this case we construct
153 // a SuccIterator which describes a basic block that has zero
155 // Defining SuccIterator for incomplete and malformed CFGs is especially
156 // useful for debugging.
160 /// This is used to interface between code that wants to
161 /// operate on terminator instructions directly.
162 unsigned getSuccessorIndex() const { return idx; }
164 inline bool operator==(const Self &x) const { return idx == x.idx; }
165 inline bool operator!=(const Self &x) const { return !operator==(x); }
167 inline reference operator*() const { return TermInst->getSuccessor(idx); }
168 inline pointer operator->() const { return operator*(); }
170 inline Self &operator++() {
175 inline Self operator++(int) { // Postincrement
181 inline Self &operator--() {
185 inline Self operator--(int) { // Postdecrement
191 inline bool operator<(const Self &x) const {
192 assert(TermInst == x.TermInst &&
193 "Cannot compare iterators of different blocks!");
197 inline bool operator<=(const Self &x) const {
198 assert(TermInst == x.TermInst &&
199 "Cannot compare iterators of different blocks!");
202 inline bool operator>=(const Self &x) const {
203 assert(TermInst == x.TermInst &&
204 "Cannot compare iterators of different blocks!");
208 inline bool operator>(const Self &x) const {
209 assert(TermInst == x.TermInst &&
210 "Cannot compare iterators of different blocks!");
214 inline Self &operator+=(int Right) {
215 unsigned new_idx = idx + Right;
216 assert(index_is_valid(new_idx) && "Iterator index out of bound");
221 inline Self operator+(int Right) const {
227 inline Self &operator-=(int Right) { return operator+=(-Right); }
229 inline Self operator-(int Right) const { return operator+(-Right); }
231 inline int operator-(const Self &x) const {
232 assert(TermInst == x.TermInst &&
233 "Cannot work on iterators of different blocks!");
234 int distance = idx - x.idx;
238 inline SuccessorProxy operator[](int offset) {
241 return SuccessorProxy(tmp);
244 /// Get the source BB of this iterator.
245 inline BB *getSource() {
246 assert(TermInst && "Source not available, if basic block was malformed");
247 return TermInst->getParent();
251 using succ_iterator = SuccIterator<TerminatorInst *, BasicBlock>;
252 using succ_const_iterator =
253 SuccIterator<const TerminatorInst *, const BasicBlock>;
254 using succ_range = iterator_range<succ_iterator>;
255 using succ_const_range = iterator_range<succ_const_iterator>;
258 inline succ_iterator succ_begin() { return succ_iterator(this); }
259 inline succ_const_iterator succ_begin() const {
260 return succ_const_iterator(this);
262 inline succ_iterator succ_end() { return succ_iterator(this, true); }
263 inline succ_const_iterator succ_end() const {
264 return succ_const_iterator(this, true);
268 inline succ_range successors() {
269 return succ_range(succ_begin(), succ_end());
271 inline succ_const_range successors() const {
272 return succ_const_range(succ_begin(), succ_end());
276 //===----------------------------------------------------------------------===//
277 // UnaryInstruction Class
278 //===----------------------------------------------------------------------===//
280 class UnaryInstruction : public Instruction {
282 UnaryInstruction(Type *Ty, unsigned iType, Value *V,
283 Instruction *IB = nullptr)
284 : Instruction(Ty, iType, &Op<0>(), 1, IB) {
287 UnaryInstruction(Type *Ty, unsigned iType, Value *V, BasicBlock *IAE)
288 : Instruction(Ty, iType, &Op<0>(), 1, IAE) {
293 // allocate space for exactly one operand
294 void *operator new(size_t s) {
295 return User::operator new(s, 1);
298 /// Transparently provide more efficient getOperand methods.
299 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
301 // Methods for support type inquiry through isa, cast, and dyn_cast:
302 static bool classof(const Instruction *I) {
303 return I->getOpcode() == Instruction::Alloca ||
304 I->getOpcode() == Instruction::Load ||
305 I->getOpcode() == Instruction::VAArg ||
306 I->getOpcode() == Instruction::ExtractValue ||
307 (I->getOpcode() >= CastOpsBegin && I->getOpcode() < CastOpsEnd);
309 static bool classof(const Value *V) {
310 return isa<Instruction>(V) && classof(cast<Instruction>(V));
315 struct OperandTraits<UnaryInstruction> :
316 public FixedNumOperandTraits<UnaryInstruction, 1> {
319 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(UnaryInstruction, Value)
321 //===----------------------------------------------------------------------===//
322 // BinaryOperator Class
323 //===----------------------------------------------------------------------===//
325 class BinaryOperator : public Instruction {
329 BinaryOperator(BinaryOps iType, Value *S1, Value *S2, Type *Ty,
330 const Twine &Name, Instruction *InsertBefore);
331 BinaryOperator(BinaryOps iType, Value *S1, Value *S2, Type *Ty,
332 const Twine &Name, BasicBlock *InsertAtEnd);
334 // Note: Instruction needs to be a friend here to call cloneImpl.
335 friend class Instruction;
337 BinaryOperator *cloneImpl() const;
340 // allocate space for exactly two operands
341 void *operator new(size_t s) {
342 return User::operator new(s, 2);
345 /// Transparently provide more efficient getOperand methods.
346 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
348 /// Construct a binary instruction, given the opcode and the two
349 /// operands. Optionally (if InstBefore is specified) insert the instruction
350 /// into a BasicBlock right before the specified instruction. The specified
351 /// Instruction is allowed to be a dereferenced end iterator.
353 static BinaryOperator *Create(BinaryOps Op, Value *S1, Value *S2,
354 const Twine &Name = Twine(),
355 Instruction *InsertBefore = nullptr);
357 /// Construct a binary instruction, given the opcode and the two
358 /// operands. Also automatically insert this instruction to the end of the
359 /// BasicBlock specified.
361 static BinaryOperator *Create(BinaryOps Op, Value *S1, Value *S2,
362 const Twine &Name, BasicBlock *InsertAtEnd);
364 /// These methods just forward to Create, and are useful when you
365 /// statically know what type of instruction you're going to create. These
366 /// helpers just save some typing.
367 #define HANDLE_BINARY_INST(N, OPC, CLASS) \
368 static BinaryOperator *Create##OPC(Value *V1, Value *V2, \
369 const Twine &Name = "") {\
370 return Create(Instruction::OPC, V1, V2, Name);\
372 #include "llvm/IR/Instruction.def"
373 #define HANDLE_BINARY_INST(N, OPC, CLASS) \
374 static BinaryOperator *Create##OPC(Value *V1, Value *V2, \
375 const Twine &Name, BasicBlock *BB) {\
376 return Create(Instruction::OPC, V1, V2, Name, BB);\
378 #include "llvm/IR/Instruction.def"
379 #define HANDLE_BINARY_INST(N, OPC, CLASS) \
380 static BinaryOperator *Create##OPC(Value *V1, Value *V2, \
381 const Twine &Name, Instruction *I) {\
382 return Create(Instruction::OPC, V1, V2, Name, I);\
384 #include "llvm/IR/Instruction.def"
386 static BinaryOperator *CreateWithCopiedFlags(BinaryOps Opc,
387 Value *V1, Value *V2,
388 BinaryOperator *CopyBO,
389 const Twine &Name = "") {
390 BinaryOperator *BO = Create(Opc, V1, V2, Name);
391 BO->copyIRFlags(CopyBO);
395 static BinaryOperator *CreateFAddFMF(Value *V1, Value *V2,
396 BinaryOperator *FMFSource,
397 const Twine &Name = "") {
398 return CreateWithCopiedFlags(Instruction::FAdd, V1, V2, FMFSource, Name);
400 static BinaryOperator *CreateFSubFMF(Value *V1, Value *V2,
401 BinaryOperator *FMFSource,
402 const Twine &Name = "") {
403 return CreateWithCopiedFlags(Instruction::FSub, V1, V2, FMFSource, Name);
405 static BinaryOperator *CreateFMulFMF(Value *V1, Value *V2,
406 BinaryOperator *FMFSource,
407 const Twine &Name = "") {
408 return CreateWithCopiedFlags(Instruction::FMul, V1, V2, FMFSource, Name);
410 static BinaryOperator *CreateFDivFMF(Value *V1, Value *V2,
411 BinaryOperator *FMFSource,
412 const Twine &Name = "") {
413 return CreateWithCopiedFlags(Instruction::FDiv, V1, V2, FMFSource, Name);
415 static BinaryOperator *CreateFRemFMF(Value *V1, Value *V2,
416 BinaryOperator *FMFSource,
417 const Twine &Name = "") {
418 return CreateWithCopiedFlags(Instruction::FRem, V1, V2, FMFSource, Name);
420 static BinaryOperator *CreateFNegFMF(Value *Op, BinaryOperator *FMFSource,
421 const Twine &Name = "") {
422 Value *Zero = ConstantFP::getNegativeZero(Op->getType());
423 return CreateWithCopiedFlags(Instruction::FSub, Zero, Op, FMFSource);
426 static BinaryOperator *CreateNSW(BinaryOps Opc, Value *V1, Value *V2,
427 const Twine &Name = "") {
428 BinaryOperator *BO = Create(Opc, V1, V2, Name);
429 BO->setHasNoSignedWrap(true);
432 static BinaryOperator *CreateNSW(BinaryOps Opc, Value *V1, Value *V2,
433 const Twine &Name, BasicBlock *BB) {
434 BinaryOperator *BO = Create(Opc, V1, V2, Name, BB);
435 BO->setHasNoSignedWrap(true);
438 static BinaryOperator *CreateNSW(BinaryOps Opc, Value *V1, Value *V2,
439 const Twine &Name, Instruction *I) {
440 BinaryOperator *BO = Create(Opc, V1, V2, Name, I);
441 BO->setHasNoSignedWrap(true);
445 static BinaryOperator *CreateNUW(BinaryOps Opc, Value *V1, Value *V2,
446 const Twine &Name = "") {
447 BinaryOperator *BO = Create(Opc, V1, V2, Name);
448 BO->setHasNoUnsignedWrap(true);
451 static BinaryOperator *CreateNUW(BinaryOps Opc, Value *V1, Value *V2,
452 const Twine &Name, BasicBlock *BB) {
453 BinaryOperator *BO = Create(Opc, V1, V2, Name, BB);
454 BO->setHasNoUnsignedWrap(true);
457 static BinaryOperator *CreateNUW(BinaryOps Opc, Value *V1, Value *V2,
458 const Twine &Name, Instruction *I) {
459 BinaryOperator *BO = Create(Opc, V1, V2, Name, I);
460 BO->setHasNoUnsignedWrap(true);
464 static BinaryOperator *CreateExact(BinaryOps Opc, Value *V1, Value *V2,
465 const Twine &Name = "") {
466 BinaryOperator *BO = Create(Opc, V1, V2, Name);
467 BO->setIsExact(true);
470 static BinaryOperator *CreateExact(BinaryOps Opc, Value *V1, Value *V2,
471 const Twine &Name, BasicBlock *BB) {
472 BinaryOperator *BO = Create(Opc, V1, V2, Name, BB);
473 BO->setIsExact(true);
476 static BinaryOperator *CreateExact(BinaryOps Opc, Value *V1, Value *V2,
477 const Twine &Name, Instruction *I) {
478 BinaryOperator *BO = Create(Opc, V1, V2, Name, I);
479 BO->setIsExact(true);
483 #define DEFINE_HELPERS(OPC, NUWNSWEXACT) \
484 static BinaryOperator *Create##NUWNSWEXACT##OPC(Value *V1, Value *V2, \
485 const Twine &Name = "") { \
486 return Create##NUWNSWEXACT(Instruction::OPC, V1, V2, Name); \
488 static BinaryOperator *Create##NUWNSWEXACT##OPC( \
489 Value *V1, Value *V2, const Twine &Name, BasicBlock *BB) { \
490 return Create##NUWNSWEXACT(Instruction::OPC, V1, V2, Name, BB); \
492 static BinaryOperator *Create##NUWNSWEXACT##OPC( \
493 Value *V1, Value *V2, const Twine &Name, Instruction *I) { \
494 return Create##NUWNSWEXACT(Instruction::OPC, V1, V2, Name, I); \
497 DEFINE_HELPERS(Add, NSW) // CreateNSWAdd
498 DEFINE_HELPERS(Add, NUW) // CreateNUWAdd
499 DEFINE_HELPERS(Sub, NSW) // CreateNSWSub
500 DEFINE_HELPERS(Sub, NUW) // CreateNUWSub
501 DEFINE_HELPERS(Mul, NSW) // CreateNSWMul
502 DEFINE_HELPERS(Mul, NUW) // CreateNUWMul
503 DEFINE_HELPERS(Shl, NSW) // CreateNSWShl
504 DEFINE_HELPERS(Shl, NUW) // CreateNUWShl
506 DEFINE_HELPERS(SDiv, Exact) // CreateExactSDiv
507 DEFINE_HELPERS(UDiv, Exact) // CreateExactUDiv
508 DEFINE_HELPERS(AShr, Exact) // CreateExactAShr
509 DEFINE_HELPERS(LShr, Exact) // CreateExactLShr
511 #undef DEFINE_HELPERS
513 /// Helper functions to construct and inspect unary operations (NEG and NOT)
514 /// via binary operators SUB and XOR:
516 /// Create the NEG and NOT instructions out of SUB and XOR instructions.
518 static BinaryOperator *CreateNeg(Value *Op, const Twine &Name = "",
519 Instruction *InsertBefore = nullptr);
520 static BinaryOperator *CreateNeg(Value *Op, const Twine &Name,
521 BasicBlock *InsertAtEnd);
522 static BinaryOperator *CreateNSWNeg(Value *Op, const Twine &Name = "",
523 Instruction *InsertBefore = nullptr);
524 static BinaryOperator *CreateNSWNeg(Value *Op, const Twine &Name,
525 BasicBlock *InsertAtEnd);
526 static BinaryOperator *CreateNUWNeg(Value *Op, const Twine &Name = "",
527 Instruction *InsertBefore = nullptr);
528 static BinaryOperator *CreateNUWNeg(Value *Op, const Twine &Name,
529 BasicBlock *InsertAtEnd);
530 static BinaryOperator *CreateFNeg(Value *Op, const Twine &Name = "",
531 Instruction *InsertBefore = nullptr);
532 static BinaryOperator *CreateFNeg(Value *Op, const Twine &Name,
533 BasicBlock *InsertAtEnd);
534 static BinaryOperator *CreateNot(Value *Op, const Twine &Name = "",
535 Instruction *InsertBefore = nullptr);
536 static BinaryOperator *CreateNot(Value *Op, const Twine &Name,
537 BasicBlock *InsertAtEnd);
539 /// Check if the given Value is a NEG, FNeg, or NOT instruction.
541 static bool isNeg(const Value *V);
542 static bool isFNeg(const Value *V, bool IgnoreZeroSign=false);
543 static bool isNot(const Value *V);
545 /// Helper functions to extract the unary argument of a NEG, FNEG or NOT
546 /// operation implemented via Sub, FSub, or Xor.
548 static const Value *getNegArgument(const Value *BinOp);
549 static Value *getNegArgument( Value *BinOp);
550 static const Value *getFNegArgument(const Value *BinOp);
551 static Value *getFNegArgument( Value *BinOp);
552 static const Value *getNotArgument(const Value *BinOp);
553 static Value *getNotArgument( Value *BinOp);
555 BinaryOps getOpcode() const {
556 return static_cast<BinaryOps>(Instruction::getOpcode());
559 /// Exchange the two operands to this instruction.
560 /// This instruction is safe to use on any binary instruction and
561 /// does not modify the semantics of the instruction. If the instruction
562 /// cannot be reversed (ie, it's a Div), then return true.
566 // Methods for support type inquiry through isa, cast, and dyn_cast:
567 static bool classof(const Instruction *I) {
568 return I->isBinaryOp();
570 static bool classof(const Value *V) {
571 return isa<Instruction>(V) && classof(cast<Instruction>(V));
576 struct OperandTraits<BinaryOperator> :
577 public FixedNumOperandTraits<BinaryOperator, 2> {
580 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(BinaryOperator, Value)
582 //===----------------------------------------------------------------------===//
584 //===----------------------------------------------------------------------===//
586 /// This is the base class for all instructions that perform data
587 /// casts. It is simply provided so that instruction category testing
588 /// can be performed with code like:
590 /// if (isa<CastInst>(Instr)) { ... }
591 /// Base class of casting instructions.
592 class CastInst : public UnaryInstruction {
594 /// Constructor with insert-before-instruction semantics for subclasses
595 CastInst(Type *Ty, unsigned iType, Value *S,
596 const Twine &NameStr = "", Instruction *InsertBefore = nullptr)
597 : UnaryInstruction(Ty, iType, S, InsertBefore) {
600 /// Constructor with insert-at-end-of-block semantics for subclasses
601 CastInst(Type *Ty, unsigned iType, Value *S,
602 const Twine &NameStr, BasicBlock *InsertAtEnd)
603 : UnaryInstruction(Ty, iType, S, InsertAtEnd) {
608 /// Provides a way to construct any of the CastInst subclasses using an
609 /// opcode instead of the subclass's constructor. The opcode must be in the
610 /// CastOps category (Instruction::isCast(opcode) returns true). This
611 /// constructor has insert-before-instruction semantics to automatically
612 /// insert the new CastInst before InsertBefore (if it is non-null).
613 /// Construct any of the CastInst subclasses
614 static CastInst *Create(
615 Instruction::CastOps, ///< The opcode of the cast instruction
616 Value *S, ///< The value to be casted (operand 0)
617 Type *Ty, ///< The type to which cast should be made
618 const Twine &Name = "", ///< Name for the instruction
619 Instruction *InsertBefore = nullptr ///< Place to insert the instruction
621 /// Provides a way to construct any of the CastInst subclasses using an
622 /// opcode instead of the subclass's constructor. The opcode must be in the
623 /// CastOps category. This constructor has insert-at-end-of-block semantics
624 /// to automatically insert the new CastInst at the end of InsertAtEnd (if
626 /// Construct any of the CastInst subclasses
627 static CastInst *Create(
628 Instruction::CastOps, ///< The opcode for the cast instruction
629 Value *S, ///< The value to be casted (operand 0)
630 Type *Ty, ///< The type to which operand is casted
631 const Twine &Name, ///< The name for the instruction
632 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
635 /// Create a ZExt or BitCast cast instruction
636 static CastInst *CreateZExtOrBitCast(
637 Value *S, ///< The value to be casted (operand 0)
638 Type *Ty, ///< The type to which cast should be made
639 const Twine &Name = "", ///< Name for the instruction
640 Instruction *InsertBefore = nullptr ///< Place to insert the instruction
643 /// Create a ZExt or BitCast cast instruction
644 static CastInst *CreateZExtOrBitCast(
645 Value *S, ///< The value to be casted (operand 0)
646 Type *Ty, ///< The type to which operand is casted
647 const Twine &Name, ///< The name for the instruction
648 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
651 /// Create a SExt or BitCast cast instruction
652 static CastInst *CreateSExtOrBitCast(
653 Value *S, ///< The value to be casted (operand 0)
654 Type *Ty, ///< The type to which cast should be made
655 const Twine &Name = "", ///< Name for the instruction
656 Instruction *InsertBefore = nullptr ///< Place to insert the instruction
659 /// Create a SExt or BitCast cast instruction
660 static CastInst *CreateSExtOrBitCast(
661 Value *S, ///< The value to be casted (operand 0)
662 Type *Ty, ///< The type to which operand is casted
663 const Twine &Name, ///< The name for the instruction
664 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
667 /// Create a BitCast AddrSpaceCast, or a PtrToInt cast instruction.
668 static CastInst *CreatePointerCast(
669 Value *S, ///< The pointer value to be casted (operand 0)
670 Type *Ty, ///< The type to which operand is casted
671 const Twine &Name, ///< The name for the instruction
672 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
675 /// Create a BitCast, AddrSpaceCast or a PtrToInt cast instruction.
676 static CastInst *CreatePointerCast(
677 Value *S, ///< The pointer value to be casted (operand 0)
678 Type *Ty, ///< The type to which cast should be made
679 const Twine &Name = "", ///< Name for the instruction
680 Instruction *InsertBefore = nullptr ///< Place to insert the instruction
683 /// Create a BitCast or an AddrSpaceCast cast instruction.
684 static CastInst *CreatePointerBitCastOrAddrSpaceCast(
685 Value *S, ///< The pointer value to be casted (operand 0)
686 Type *Ty, ///< The type to which operand is casted
687 const Twine &Name, ///< The name for the instruction
688 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
691 /// Create a BitCast or an AddrSpaceCast cast instruction.
692 static CastInst *CreatePointerBitCastOrAddrSpaceCast(
693 Value *S, ///< The pointer value to be casted (operand 0)
694 Type *Ty, ///< The type to which cast should be made
695 const Twine &Name = "", ///< Name for the instruction
696 Instruction *InsertBefore = nullptr ///< Place to insert the instruction
699 /// Create a BitCast, a PtrToInt, or an IntToPTr cast instruction.
701 /// If the value is a pointer type and the destination an integer type,
702 /// creates a PtrToInt cast. If the value is an integer type and the
703 /// destination a pointer type, creates an IntToPtr cast. Otherwise, creates
705 static CastInst *CreateBitOrPointerCast(
706 Value *S, ///< The pointer value to be casted (operand 0)
707 Type *Ty, ///< The type to which cast should be made
708 const Twine &Name = "", ///< Name for the instruction
709 Instruction *InsertBefore = nullptr ///< Place to insert the instruction
712 /// Create a ZExt, BitCast, or Trunc for int -> int casts.
713 static CastInst *CreateIntegerCast(
714 Value *S, ///< The pointer value to be casted (operand 0)
715 Type *Ty, ///< The type to which cast should be made
716 bool isSigned, ///< Whether to regard S as signed or not
717 const Twine &Name = "", ///< Name for the instruction
718 Instruction *InsertBefore = nullptr ///< Place to insert the instruction
721 /// Create a ZExt, BitCast, or Trunc for int -> int casts.
722 static CastInst *CreateIntegerCast(
723 Value *S, ///< The integer value to be casted (operand 0)
724 Type *Ty, ///< The integer type to which operand is casted
725 bool isSigned, ///< Whether to regard S as signed or not
726 const Twine &Name, ///< The name for the instruction
727 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
730 /// Create an FPExt, BitCast, or FPTrunc for fp -> fp casts
731 static CastInst *CreateFPCast(
732 Value *S, ///< The floating point value to be casted
733 Type *Ty, ///< The floating point type to cast to
734 const Twine &Name = "", ///< Name for the instruction
735 Instruction *InsertBefore = nullptr ///< Place to insert the instruction
738 /// Create an FPExt, BitCast, or FPTrunc for fp -> fp casts
739 static CastInst *CreateFPCast(
740 Value *S, ///< The floating point value to be casted
741 Type *Ty, ///< The floating point type to cast to
742 const Twine &Name, ///< The name for the instruction
743 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
746 /// Create a Trunc or BitCast cast instruction
747 static CastInst *CreateTruncOrBitCast(
748 Value *S, ///< The value to be casted (operand 0)
749 Type *Ty, ///< The type to which cast should be made
750 const Twine &Name = "", ///< Name for the instruction
751 Instruction *InsertBefore = nullptr ///< Place to insert the instruction
754 /// Create a Trunc or BitCast cast instruction
755 static CastInst *CreateTruncOrBitCast(
756 Value *S, ///< The value to be casted (operand 0)
757 Type *Ty, ///< The type to which operand is casted
758 const Twine &Name, ///< The name for the instruction
759 BasicBlock *InsertAtEnd ///< The block to insert the instruction into
762 /// Check whether it is valid to call getCastOpcode for these types.
763 static bool isCastable(
764 Type *SrcTy, ///< The Type from which the value should be cast.
765 Type *DestTy ///< The Type to which the value should be cast.
768 /// Check whether a bitcast between these types is valid
769 static bool isBitCastable(
770 Type *SrcTy, ///< The Type from which the value should be cast.
771 Type *DestTy ///< The Type to which the value should be cast.
774 /// Check whether a bitcast, inttoptr, or ptrtoint cast between these
775 /// types is valid and a no-op.
777 /// This ensures that any pointer<->integer cast has enough bits in the
778 /// integer and any other cast is a bitcast.
779 static bool isBitOrNoopPointerCastable(
780 Type *SrcTy, ///< The Type from which the value should be cast.
781 Type *DestTy, ///< The Type to which the value should be cast.
782 const DataLayout &DL);
784 /// Returns the opcode necessary to cast Val into Ty using usual casting
786 /// Infer the opcode for cast operand and type
787 static Instruction::CastOps getCastOpcode(
788 const Value *Val, ///< The value to cast
789 bool SrcIsSigned, ///< Whether to treat the source as signed
790 Type *Ty, ///< The Type to which the value should be casted
791 bool DstIsSigned ///< Whether to treate the dest. as signed
794 /// There are several places where we need to know if a cast instruction
795 /// only deals with integer source and destination types. To simplify that
796 /// logic, this method is provided.
797 /// @returns true iff the cast has only integral typed operand and dest type.
798 /// Determine if this is an integer-only cast.
799 bool isIntegerCast() const;
801 /// A lossless cast is one that does not alter the basic value. It implies
802 /// a no-op cast but is more stringent, preventing things like int->float,
803 /// long->double, or int->ptr.
804 /// @returns true iff the cast is lossless.
805 /// Determine if this is a lossless cast.
806 bool isLosslessCast() const;
808 /// A no-op cast is one that can be effected without changing any bits.
809 /// It implies that the source and destination types are the same size. The
810 /// DataLayout argument is to determine the pointer size when examining casts
811 /// involving Integer and Pointer types. They are no-op casts if the integer
812 /// is the same size as the pointer. However, pointer size varies with
814 /// Determine if the described cast is a no-op cast.
815 static bool isNoopCast(
816 Instruction::CastOps Opcode, ///< Opcode of cast
817 Type *SrcTy, ///< SrcTy of cast
818 Type *DstTy, ///< DstTy of cast
819 const DataLayout &DL ///< DataLayout to get the Int Ptr type from.
822 /// Determine if this cast is a no-op cast.
824 /// \param DL is the DataLayout to determine pointer size.
825 bool isNoopCast(const DataLayout &DL) const;
827 /// Determine how a pair of casts can be eliminated, if they can be at all.
828 /// This is a helper function for both CastInst and ConstantExpr.
829 /// @returns 0 if the CastInst pair can't be eliminated, otherwise
830 /// returns Instruction::CastOps value for a cast that can replace
831 /// the pair, casting SrcTy to DstTy.
832 /// Determine if a cast pair is eliminable
833 static unsigned isEliminableCastPair(
834 Instruction::CastOps firstOpcode, ///< Opcode of first cast
835 Instruction::CastOps secondOpcode, ///< Opcode of second cast
836 Type *SrcTy, ///< SrcTy of 1st cast
837 Type *MidTy, ///< DstTy of 1st cast & SrcTy of 2nd cast
838 Type *DstTy, ///< DstTy of 2nd cast
839 Type *SrcIntPtrTy, ///< Integer type corresponding to Ptr SrcTy, or null
840 Type *MidIntPtrTy, ///< Integer type corresponding to Ptr MidTy, or null
841 Type *DstIntPtrTy ///< Integer type corresponding to Ptr DstTy, or null
844 /// Return the opcode of this CastInst
845 Instruction::CastOps getOpcode() const {
846 return Instruction::CastOps(Instruction::getOpcode());
849 /// Return the source type, as a convenience
850 Type* getSrcTy() const { return getOperand(0)->getType(); }
851 /// Return the destination type, as a convenience
852 Type* getDestTy() const { return getType(); }
854 /// This method can be used to determine if a cast from S to DstTy using
855 /// Opcode op is valid or not.
856 /// @returns true iff the proposed cast is valid.
857 /// Determine if a cast is valid without creating one.
858 static bool castIsValid(Instruction::CastOps op, Value *S, Type *DstTy);
860 /// Methods for support type inquiry through isa, cast, and dyn_cast:
861 static bool classof(const Instruction *I) {
864 static bool classof(const Value *V) {
865 return isa<Instruction>(V) && classof(cast<Instruction>(V));
869 //===----------------------------------------------------------------------===//
871 //===----------------------------------------------------------------------===//
873 /// This class is the base class for the comparison instructions.
874 /// Abstract base class of comparison instructions.
875 class CmpInst : public Instruction {
877 /// This enumeration lists the possible predicates for CmpInst subclasses.
878 /// Values in the range 0-31 are reserved for FCmpInst, while values in the
879 /// range 32-64 are reserved for ICmpInst. This is necessary to ensure the
880 /// predicate values are not overlapping between the classes.
882 /// Some passes (e.g. InstCombine) depend on the bit-wise characteristics of
883 /// FCMP_* values. Changing the bit patterns requires a potential change to
886 // Opcode U L G E Intuitive operation
887 FCMP_FALSE = 0, ///< 0 0 0 0 Always false (always folded)
888 FCMP_OEQ = 1, ///< 0 0 0 1 True if ordered and equal
889 FCMP_OGT = 2, ///< 0 0 1 0 True if ordered and greater than
890 FCMP_OGE = 3, ///< 0 0 1 1 True if ordered and greater than or equal
891 FCMP_OLT = 4, ///< 0 1 0 0 True if ordered and less than
892 FCMP_OLE = 5, ///< 0 1 0 1 True if ordered and less than or equal
893 FCMP_ONE = 6, ///< 0 1 1 0 True if ordered and operands are unequal
894 FCMP_ORD = 7, ///< 0 1 1 1 True if ordered (no nans)
895 FCMP_UNO = 8, ///< 1 0 0 0 True if unordered: isnan(X) | isnan(Y)
896 FCMP_UEQ = 9, ///< 1 0 0 1 True if unordered or equal
897 FCMP_UGT = 10, ///< 1 0 1 0 True if unordered or greater than
898 FCMP_UGE = 11, ///< 1 0 1 1 True if unordered, greater than, or equal
899 FCMP_ULT = 12, ///< 1 1 0 0 True if unordered or less than
900 FCMP_ULE = 13, ///< 1 1 0 1 True if unordered, less than, or equal
901 FCMP_UNE = 14, ///< 1 1 1 0 True if unordered or not equal
902 FCMP_TRUE = 15, ///< 1 1 1 1 Always true (always folded)
903 FIRST_FCMP_PREDICATE = FCMP_FALSE,
904 LAST_FCMP_PREDICATE = FCMP_TRUE,
905 BAD_FCMP_PREDICATE = FCMP_TRUE + 1,
906 ICMP_EQ = 32, ///< equal
907 ICMP_NE = 33, ///< not equal
908 ICMP_UGT = 34, ///< unsigned greater than
909 ICMP_UGE = 35, ///< unsigned greater or equal
910 ICMP_ULT = 36, ///< unsigned less than
911 ICMP_ULE = 37, ///< unsigned less or equal
912 ICMP_SGT = 38, ///< signed greater than
913 ICMP_SGE = 39, ///< signed greater or equal
914 ICMP_SLT = 40, ///< signed less than
915 ICMP_SLE = 41, ///< signed less or equal
916 FIRST_ICMP_PREDICATE = ICMP_EQ,
917 LAST_ICMP_PREDICATE = ICMP_SLE,
918 BAD_ICMP_PREDICATE = ICMP_SLE + 1
922 CmpInst(Type *ty, Instruction::OtherOps op, Predicate pred,
923 Value *LHS, Value *RHS, const Twine &Name = "",
924 Instruction *InsertBefore = nullptr);
926 CmpInst(Type *ty, Instruction::OtherOps op, Predicate pred,
927 Value *LHS, Value *RHS, const Twine &Name,
928 BasicBlock *InsertAtEnd);
931 // allocate space for exactly two operands
932 void *operator new(size_t s) {
933 return User::operator new(s, 2);
936 /// Construct a compare instruction, given the opcode, the predicate and
937 /// the two operands. Optionally (if InstBefore is specified) insert the
938 /// instruction into a BasicBlock right before the specified instruction.
939 /// The specified Instruction is allowed to be a dereferenced end iterator.
941 static CmpInst *Create(OtherOps Op,
942 Predicate predicate, Value *S1,
943 Value *S2, const Twine &Name = "",
944 Instruction *InsertBefore = nullptr);
946 /// Construct a compare instruction, given the opcode, the predicate and the
947 /// two operands. Also automatically insert this instruction to the end of
948 /// the BasicBlock specified.
950 static CmpInst *Create(OtherOps Op, Predicate predicate, Value *S1,
951 Value *S2, const Twine &Name, BasicBlock *InsertAtEnd);
953 /// Get the opcode casted to the right type
954 OtherOps getOpcode() const {
955 return static_cast<OtherOps>(Instruction::getOpcode());
958 /// Return the predicate for this instruction.
959 Predicate getPredicate() const {
960 return Predicate(getSubclassDataFromInstruction());
963 /// Set the predicate for this instruction to the specified value.
964 void setPredicate(Predicate P) { setInstructionSubclassData(P); }
966 static bool isFPPredicate(Predicate P) {
967 return P >= FIRST_FCMP_PREDICATE && P <= LAST_FCMP_PREDICATE;
970 static bool isIntPredicate(Predicate P) {
971 return P >= FIRST_ICMP_PREDICATE && P <= LAST_ICMP_PREDICATE;
974 static StringRef getPredicateName(Predicate P);
976 bool isFPPredicate() const { return isFPPredicate(getPredicate()); }
977 bool isIntPredicate() const { return isIntPredicate(getPredicate()); }
979 /// For example, EQ -> NE, UGT -> ULE, SLT -> SGE,
980 /// OEQ -> UNE, UGT -> OLE, OLT -> UGE, etc.
981 /// @returns the inverse predicate for the instruction's current predicate.
982 /// Return the inverse of the instruction's predicate.
983 Predicate getInversePredicate() const {
984 return getInversePredicate(getPredicate());
987 /// For example, EQ -> NE, UGT -> ULE, SLT -> SGE,
988 /// OEQ -> UNE, UGT -> OLE, OLT -> UGE, etc.
989 /// @returns the inverse predicate for predicate provided in \p pred.
990 /// Return the inverse of a given predicate
991 static Predicate getInversePredicate(Predicate pred);
993 /// For example, EQ->EQ, SLE->SGE, ULT->UGT,
994 /// OEQ->OEQ, ULE->UGE, OLT->OGT, etc.
995 /// @returns the predicate that would be the result of exchanging the two
996 /// operands of the CmpInst instruction without changing the result
998 /// Return the predicate as if the operands were swapped
999 Predicate getSwappedPredicate() const {
1000 return getSwappedPredicate(getPredicate());
1003 /// This is a static version that you can use without an instruction
1005 /// Return the predicate as if the operands were swapped.
1006 static Predicate getSwappedPredicate(Predicate pred);
1008 /// For predicate of kind "is X or equal to 0" returns the predicate "is X".
1009 /// For predicate of kind "is X" returns the predicate "is X or equal to 0".
1010 /// does not support other kind of predicates.
1011 /// @returns the predicate that does not contains is equal to zero if
1012 /// it had and vice versa.
1013 /// Return the flipped strictness of predicate
1014 Predicate getFlippedStrictnessPredicate() const {
1015 return getFlippedStrictnessPredicate(getPredicate());
1018 /// This is a static version that you can use without an instruction
1020 /// Return the flipped strictness of predicate
1021 static Predicate getFlippedStrictnessPredicate(Predicate pred);
1023 /// For example, SGT -> SGE, SLT -> SLE, ULT -> ULE, UGT -> UGE.
1024 /// Returns the non-strict version of strict comparisons.
1025 Predicate getNonStrictPredicate() const {
1026 return getNonStrictPredicate(getPredicate());
1029 /// This is a static version that you can use without an instruction
1031 /// @returns the non-strict version of comparison provided in \p pred.
1032 /// If \p pred is not a strict comparison predicate, returns \p pred.
1033 /// Returns the non-strict version of strict comparisons.
1034 static Predicate getNonStrictPredicate(Predicate pred);
1036 /// Provide more efficient getOperand methods.
1037 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
1039 /// This is just a convenience that dispatches to the subclasses.
1040 /// Swap the operands and adjust predicate accordingly to retain
1041 /// the same comparison.
1042 void swapOperands();
1044 /// This is just a convenience that dispatches to the subclasses.
1045 /// Determine if this CmpInst is commutative.
1046 bool isCommutative() const;
1048 /// This is just a convenience that dispatches to the subclasses.
1049 /// Determine if this is an equals/not equals predicate.
1050 bool isEquality() const;
1052 /// @returns true if the comparison is signed, false otherwise.
1053 /// Determine if this instruction is using a signed comparison.
1054 bool isSigned() const {
1055 return isSigned(getPredicate());
1058 /// @returns true if the comparison is unsigned, false otherwise.
1059 /// Determine if this instruction is using an unsigned comparison.
1060 bool isUnsigned() const {
1061 return isUnsigned(getPredicate());
1064 /// For example, ULT->SLT, ULE->SLE, UGT->SGT, UGE->SGE, SLT->Failed assert
1065 /// @returns the signed version of the unsigned predicate pred.
1066 /// return the signed version of a predicate
1067 static Predicate getSignedPredicate(Predicate pred);
1069 /// For example, ULT->SLT, ULE->SLE, UGT->SGT, UGE->SGE, SLT->Failed assert
1070 /// @returns the signed version of the predicate for this instruction (which
1071 /// has to be an unsigned predicate).
1072 /// return the signed version of a predicate
1073 Predicate getSignedPredicate() {
1074 return getSignedPredicate(getPredicate());
1077 /// This is just a convenience.
1078 /// Determine if this is true when both operands are the same.
1079 bool isTrueWhenEqual() const {
1080 return isTrueWhenEqual(getPredicate());
1083 /// This is just a convenience.
1084 /// Determine if this is false when both operands are the same.
1085 bool isFalseWhenEqual() const {
1086 return isFalseWhenEqual(getPredicate());
1089 /// @returns true if the predicate is unsigned, false otherwise.
1090 /// Determine if the predicate is an unsigned operation.
1091 static bool isUnsigned(Predicate predicate);
1093 /// @returns true if the predicate is signed, false otherwise.
1094 /// Determine if the predicate is an signed operation.
1095 static bool isSigned(Predicate predicate);
1097 /// Determine if the predicate is an ordered operation.
1098 static bool isOrdered(Predicate predicate);
1100 /// Determine if the predicate is an unordered operation.
1101 static bool isUnordered(Predicate predicate);
1103 /// Determine if the predicate is true when comparing a value with itself.
1104 static bool isTrueWhenEqual(Predicate predicate);
1106 /// Determine if the predicate is false when comparing a value with itself.
1107 static bool isFalseWhenEqual(Predicate predicate);
1109 /// Determine if Pred1 implies Pred2 is true when two compares have matching
1111 static bool isImpliedTrueByMatchingCmp(Predicate Pred1, Predicate Pred2);
1113 /// Determine if Pred1 implies Pred2 is false when two compares have matching
1115 static bool isImpliedFalseByMatchingCmp(Predicate Pred1, Predicate Pred2);
1117 /// Methods for support type inquiry through isa, cast, and dyn_cast:
1118 static bool classof(const Instruction *I) {
1119 return I->getOpcode() == Instruction::ICmp ||
1120 I->getOpcode() == Instruction::FCmp;
1122 static bool classof(const Value *V) {
1123 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1126 /// Create a result type for fcmp/icmp
1127 static Type* makeCmpResultType(Type* opnd_type) {
1128 if (VectorType* vt = dyn_cast<VectorType>(opnd_type)) {
1129 return VectorType::get(Type::getInt1Ty(opnd_type->getContext()),
1130 vt->getNumElements());
1132 return Type::getInt1Ty(opnd_type->getContext());
1136 // Shadow Value::setValueSubclassData with a private forwarding method so that
1137 // subclasses cannot accidentally use it.
1138 void setValueSubclassData(unsigned short D) {
1139 Value::setValueSubclassData(D);
1143 // FIXME: these are redundant if CmpInst < BinaryOperator
1145 struct OperandTraits<CmpInst> : public FixedNumOperandTraits<CmpInst, 2> {
1148 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(CmpInst, Value)
1150 //===----------------------------------------------------------------------===//
1151 // FuncletPadInst Class
1152 //===----------------------------------------------------------------------===//
1153 class FuncletPadInst : public Instruction {
1155 FuncletPadInst(const FuncletPadInst &CPI);
1157 explicit FuncletPadInst(Instruction::FuncletPadOps Op, Value *ParentPad,
1158 ArrayRef<Value *> Args, unsigned Values,
1159 const Twine &NameStr, Instruction *InsertBefore);
1160 explicit FuncletPadInst(Instruction::FuncletPadOps Op, Value *ParentPad,
1161 ArrayRef<Value *> Args, unsigned Values,
1162 const Twine &NameStr, BasicBlock *InsertAtEnd);
1164 void init(Value *ParentPad, ArrayRef<Value *> Args, const Twine &NameStr);
1167 // Note: Instruction needs to be a friend here to call cloneImpl.
1168 friend class Instruction;
1169 friend class CatchPadInst;
1170 friend class CleanupPadInst;
1172 FuncletPadInst *cloneImpl() const;
1175 /// Provide fast operand accessors
1176 DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
1178 /// getNumArgOperands - Return the number of funcletpad arguments.
1180 unsigned getNumArgOperands() const { return getNumOperands() - 1; }
1182 /// Convenience accessors
1184 /// Return the outer EH-pad this funclet is nested within.
1186 /// Note: This returns the associated CatchSwitchInst if this FuncletPadInst
1187 /// is a CatchPadInst.
1188 Value *getParentPad() const { return Op<-1>(); }
1189 void setParentPad(Value *ParentPad) {
1191 Op<-1>() = ParentPad;
1194 /// getArgOperand/setArgOperand - Return/set the i-th funcletpad argument.
1196 Value *getArgOperand(unsigned i) const { return getOperand(i); }
1197 void setArgOperand(unsigned i, Value *v) { setOperand(i, v); }
1199 /// arg_operands - iteration adapter for range-for loops.
1200 op_range arg_operands() { return op_range(op_begin(), op_end() - 1); }
1202 /// arg_operands - iteration adapter for range-for loops.
1203 const_op_range arg_operands() const {
1204 return const_op_range(op_begin(), op_end() - 1);
1207 // Methods for support type inquiry through isa, cast, and dyn_cast:
1208 static bool classof(const Instruction *I) { return I->isFuncletPad(); }
1209 static bool classof(const Value *V) {
1210 return isa<Instruction>(V) && classof(cast<Instruction>(V));
1215 struct OperandTraits<FuncletPadInst>
1216 : public VariadicOperandTraits<FuncletPadInst, /*MINARITY=*/1> {};
1218 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(FuncletPadInst, Value)
1220 /// A lightweight accessor for an operand bundle meant to be passed
1221 /// around by value.
1222 struct OperandBundleUse {
1223 ArrayRef<Use> Inputs;
1225 OperandBundleUse() = default;
1226 explicit OperandBundleUse(StringMapEntry<uint32_t> *Tag, ArrayRef<Use> Inputs)
1227 : Inputs(Inputs), Tag(Tag) {}
1229 /// Return true if the operand at index \p Idx in this operand bundle
1230 /// has the attribute A.
1231 bool operandHasAttr(unsigned Idx, Attribute::AttrKind A) const {
1232 if (isDeoptOperandBundle())
1233 if (A == Attribute::ReadOnly || A == Attribute::NoCapture)
1234 return Inputs[Idx]->getType()->isPointerTy();
1236 // Conservative answer: no operands have any attributes.
1240 /// Return the tag of this operand bundle as a string.
1241 StringRef getTagName() const {
1242 return Tag->getKey();
1245 /// Return the tag of this operand bundle as an integer.
1247 /// Operand bundle tags are interned by LLVMContextImpl::getOrInsertBundleTag,
1248 /// and this function returns the unique integer getOrInsertBundleTag
1249 /// associated the tag of this operand bundle to.
1250 uint32_t getTagID() const {
1251 return Tag->getValue();
1254 /// Return true if this is a "deopt" operand bundle.
1255 bool isDeoptOperandBundle() const {
1256 return getTagID() == LLVMContext::OB_deopt;
1259 /// Return true if this is a "funclet" operand bundle.
1260 bool isFuncletOperandBundle() const {
1261 return getTagID() == LLVMContext::OB_funclet;
1265 /// Pointer to an entry in LLVMContextImpl::getOrInsertBundleTag.
1266 StringMapEntry<uint32_t> *Tag;
1269 /// A container for an operand bundle being viewed as a set of values
1270 /// rather than a set of uses.
1272 /// Unlike OperandBundleUse, OperandBundleDefT owns the memory it carries, and
1273 /// so it is possible to create and pass around "self-contained" instances of
1274 /// OperandBundleDef and ConstOperandBundleDef.
1275 template <typename InputTy> class OperandBundleDefT {
1277 std::vector<InputTy> Inputs;
1280 explicit OperandBundleDefT(std::string Tag, std::vector<InputTy> Inputs)
1281 : Tag(std::move(Tag)), Inputs(std::move(Inputs)) {}
1282 explicit OperandBundleDefT(std::string Tag, ArrayRef<InputTy> Inputs)
1283 : Tag(std::move(Tag)), Inputs(Inputs) {}
1285 explicit OperandBundleDefT(const OperandBundleUse &OBU) {
1286 Tag = OBU.getTagName();
1287 Inputs.insert(Inputs.end(), OBU.Inputs.begin(), OBU.Inputs.end());
1290 ArrayRef<InputTy> inputs() const { return Inputs; }
1292 using input_iterator = typename std::vector<InputTy>::const_iterator;
1294 size_t input_size() const { return Inputs.size(); }
1295 input_iterator input_begin() const { return Inputs.begin(); }
1296 input_iterator input_end() const { return Inputs.end(); }
1298 StringRef getTag() const { return Tag; }
1301 using OperandBundleDef = OperandBundleDefT<Value *>;
1302 using ConstOperandBundleDef = OperandBundleDefT<const Value *>;
1304 /// A mixin to add operand bundle functionality to llvm instruction
1307 /// OperandBundleUser uses the descriptor area co-allocated with the host User
1308 /// to store some meta information about which operands are "normal" operands,
1309 /// and which ones belong to some operand bundle.
1311 /// The layout of an operand bundle user is
1313 /// +-----------uint32_t End-------------------------------------+
1315 /// | +--------uint32_t Begin--------------------+ |
1318 /// |------|------|----|----|----|----|----|---------|----|---------|----|-----
1319 /// | BOI0 | BOI1 | .. | DU | U0 | U1 | .. | BOI0_U0 | .. | BOI1_U0 | .. | Un
1320 /// |------|------|----|----|----|----|----|---------|----|---------|----|-----
1323 /// | +--------uint32_t Begin------------+ |
1325 /// +-----------uint32_t End-----------------------------+
1328 /// BOI0, BOI1 ... are descriptions of operand bundles in this User's use list.
1329 /// These descriptions are installed and managed by this class, and they're all
1330 /// instances of OperandBundleUser<T>::BundleOpInfo.
1332 /// DU is an additional descriptor installed by User's 'operator new' to keep
1333 /// track of the 'BOI0 ... BOIN' co-allocation. OperandBundleUser does not
1334 /// access or modify DU in any way, it's an implementation detail private to
1337 /// The regular Use& vector for the User starts at U0. The operand bundle uses
1338 /// are part of the Use& vector, just like normal uses. In the diagram above,
1339 /// the operand bundle uses start at BOI0_U0. Each instance of BundleOpInfo has
1340 /// information about a contiguous set of uses constituting an operand bundle,
1341 /// and the total set of operand bundle uses themselves form a contiguous set of
1342 /// uses (i.e. there are no gaps between uses corresponding to individual
1343 /// operand bundles).
1345 /// This class does not know the location of the set of operand bundle uses
1346 /// within the use list -- that is decided by the User using this class via the
1347 /// BeginIdx argument in populateBundleOperandInfos.
1349 /// Currently operand bundle users with hung-off operands are not supported.
1350 template <typename InstrTy, typename OpIteratorTy> class OperandBundleUser {
1352 /// Return the number of operand bundles associated with this User.
1353 unsigned getNumOperandBundles() const {
1354 return std::distance(bundle_op_info_begin(), bundle_op_info_end());
1357 /// Return true if this User has any operand bundles.
1358 bool hasOperandBundles() const { return getNumOperandBundles() != 0; }
1360 /// Return the index of the first bundle operand in the Use array.
1361 unsigned getBundleOperandsStartIndex() const {
1362 assert(hasOperandBundles() && "Don't call otherwise!");
1363 return bundle_op_info_begin()->Begin;
1366 /// Return the index of the last bundle operand in the Use array.
1367 unsigned getBundleOperandsEndIndex() const {
1368 assert(hasOperandBundles() && "Don't call otherwise!");
1369 return bundle_op_info_end()[-1].End;
1372 /// Return true if the operand at index \p Idx is a bundle operand.
1373 bool isBundleOperand(unsigned Idx) const {
1374 return hasOperandBundles() && Idx >= getBundleOperandsStartIndex() &&
1375 Idx < getBundleOperandsEndIndex();
1378 /// Return the total number operands (not operand bundles) used by
1379 /// every operand bundle in this OperandBundleUser.
1380 unsigned getNumTotalBundleOperands() const {
1381 if (!hasOperandBundles())
1384 unsigned Begin = getBundleOperandsStartIndex();
1385 unsigned End = getBundleOperandsEndIndex();
1387 assert(Begin <= End && "Should be!");
1391 /// Return the operand bundle at a specific index.
1392 OperandBundleUse getOperandBundleAt(unsigned Index) const {
1393 assert(Index < getNumOperandBundles() && "Index out of bounds!");
1394 return operandBundleFromBundleOpInfo(*(bundle_op_info_begin() + Index));
1397 /// Return the number of operand bundles with the tag Name attached to
1398 /// this instruction.
1399 unsigned countOperandBundlesOfType(StringRef Name) const {
1401 for (unsigned i = 0, e = getNumOperandBundles(); i != e; ++i)
1402 if (getOperandBundleAt(i).getTagName() == Name)
1408 /// Return the number of operand bundles with the tag ID attached to
1409 /// this instruction.
1410 unsigned countOperandBundlesOfType(uint32_t ID) const {
1412 for (unsigned i = 0, e = getNumOperandBundles(); i != e; ++i)
1413 if (getOperandBundleAt(i).getTagID() == ID)
1419 /// Return an operand bundle by name, if present.
1421 /// It is an error to call this for operand bundle types that may have
1422 /// multiple instances of them on the same instruction.
1423 Optional<OperandBundleUse> getOperandBundle(StringRef Name) const {
1424 assert(countOperandBundlesOfType(Name) < 2 && "Precondition violated!");
1426 for (unsigned i = 0, e = getNumOperandBundles(); i != e; ++i) {
1427 OperandBundleUse U = getOperandBundleAt(i);
1428 if (U.getTagName() == Name)
1435 /// Return an operand bundle by tag ID, if present.
1437 /// It is an error to call this for operand bundle types that may have
1438 /// multiple instances of them on the same instruction.
1439 Optional<OperandBundleUse> getOperandBundle(uint32_t ID) const {
1440 assert(countOperandBundlesOfType(ID) < 2 && "Precondition violated!");
1442 for (unsigned i = 0, e = getNumOperandBundles(); i != e; ++i) {
1443 OperandBundleUse U = getOperandBundleAt(i);
1444 if (U.getTagID() == ID)
1451 /// Return the list of operand bundles attached to this instruction as
1452 /// a vector of OperandBundleDefs.
1454 /// This function copies the OperandBundeUse instances associated with this
1455 /// OperandBundleUser to a vector of OperandBundleDefs. Note:
1456 /// OperandBundeUses and OperandBundleDefs are non-trivially *different*
1457 /// representations of operand bundles (see documentation above).
1458 void getOperandBundlesAsDefs(SmallVectorImpl<OperandBundleDef> &Defs) const {
1459 for (unsigned i = 0, e = getNumOperandBundles(); i != e; ++i)
1460 Defs.emplace_back(getOperandBundleAt(i));
1463 /// Return the operand bundle for the operand at index OpIdx.
1465 /// It is an error to call this with an OpIdx that does not correspond to an
1467 OperandBundleUse getOperandBundleForOperand(unsigned OpIdx) const {
1468 return operandBundleFromBundleOpInfo(getBundleOpInfoForOperand(OpIdx));
1471 /// Return true if this operand bundle user has operand bundles that
1472 /// may read from the heap.
1473 bool hasReadingOperandBundles() const {
1474 // Implementation note: this is a conservative implementation of operand
1475 // bundle semantics, where *any* operand bundle forces a callsite to be at
1477 return hasOperandBundles();
1480 /// Return true if this operand bundle user has operand bundles that
1481 /// may write to the heap.
1482 bool hasClobberingOperandBundles() const {
1483 for (auto &BOI : bundle_op_infos()) {
1484 if (BOI.Tag->second == LLVMContext::OB_deopt ||
1485 BOI.Tag->second == LLVMContext::OB_funclet)
1488 // This instruction has an operand bundle that is not known to us.
1489 // Assume the worst.
1496 /// Return true if the bundle operand at index \p OpIdx has the
1498 bool bundleOperandHasAttr(unsigned OpIdx, Attribute::AttrKind A) const {
1499 auto &BOI = getBundleOpInfoForOperand(OpIdx);
1500 auto OBU = operandBundleFromBundleOpInfo(BOI);
1501 return OBU.operandHasAttr(OpIdx - BOI.Begin, A);
1504 /// Return true if \p Other has the same sequence of operand bundle
1505 /// tags with the same number of operands on each one of them as this
1506 /// OperandBundleUser.
1507 bool hasIdenticalOperandBundleSchema(
1508 const OperandBundleUser<InstrTy, OpIteratorTy> &Other) const {
1509 if (getNumOperandBundles() != Other.getNumOperandBundles())
1512 return std::equal(bundle_op_info_begin(), bundle_op_info_end(),
1513 Other.bundle_op_info_begin());
1516 /// Return true if this operand bundle user contains operand bundles
1517 /// with tags other than those specified in \p IDs.
1518 bool hasOperandBundlesOtherThan(ArrayRef<uint32_t> IDs) const {
1519 for (unsigned i = 0, e = getNumOperandBundles(); i != e; ++i) {
1520 uint32_t ID = getOperandBundleAt(i).getTagID();
1521 if (!is_contained(IDs, ID))
1528 /// Is the function attribute S disallowed by some operand bundle on
1529 /// this operand bundle user?
1530 bool isFnAttrDisallowedByOpBundle(StringRef S) const {
1531 // Operand bundles only possibly disallow readnone, readonly and argmenonly
1532 // attributes. All String attributes are fine.
1536 /// Is the function attribute A disallowed by some operand bundle on
1537 /// this operand bundle user?
1538 bool isFnAttrDisallowedByOpBundle(Attribute::AttrKind A) const {
1543 case Attribute::InaccessibleMemOrArgMemOnly:
1544 return hasReadingOperandBundles();
1546 case Attribute::InaccessibleMemOnly:
1547 return hasReadingOperandBundles();
1549 case Attribute::ArgMemOnly:
1550 return hasReadingOperandBundles();
1552 case Attribute::ReadNone:
1553 return hasReadingOperandBundles();
1555 case Attribute::ReadOnly:
1556 return hasClobberingOperandBundles();
1559 llvm_unreachable("switch has a default case!");
1562 /// Used to keep track of an operand bundle. See the main comment on
1563 /// OperandBundleUser above.
1564 struct BundleOpInfo {
1565 /// The operand bundle tag, interned by
1566 /// LLVMContextImpl::getOrInsertBundleTag.
1567 StringMapEntry<uint32_t> *Tag;
1569 /// The index in the Use& vector where operands for this operand
1573 /// The index in the Use& vector where operands for this operand
1577 bool operator==(const BundleOpInfo &Other) const {
1578 return Tag == Other.Tag && Begin == Other.Begin && End == Other.End;
1582 /// Simple helper function to map a BundleOpInfo to an
1583 /// OperandBundleUse.
1585 operandBundleFromBundleOpInfo(const BundleOpInfo &BOI) const {
1586 auto op_begin = static_cast<const InstrTy *>(this)->op_begin();
1587 ArrayRef<Use> Inputs(op_begin + BOI.Begin, op_begin + BOI.End);
1588 return OperandBundleUse(BOI.Tag, Inputs);
1591 using bundle_op_iterator = BundleOpInfo *;
1592 using const_bundle_op_iterator = const BundleOpInfo *;
1594 /// Return the start of the list of BundleOpInfo instances associated
1595 /// with this OperandBundleUser.
1596 bundle_op_iterator bundle_op_info_begin() {
1597 if (!static_cast<InstrTy *>(this)->hasDescriptor())
1600 uint8_t *BytesBegin = static_cast<InstrTy *>(this)->getDescriptor().begin();
1601 return reinterpret_cast<bundle_op_iterator>(BytesBegin);
1604 /// Return the start of the list of BundleOpInfo instances associated
1605 /// with this OperandBundleUser.
1606 const_bundle_op_iterator bundle_op_info_begin() const {
1607 auto *NonConstThis =
1608 const_cast<OperandBundleUser<InstrTy, OpIteratorTy> *>(this);
1609 return NonConstThis->bundle_op_info_begin();
1612 /// Return the end of the list of BundleOpInfo instances associated
1613 /// with this OperandBundleUser.
1614 bundle_op_iterator bundle_op_info_end() {
1615 if (!static_cast<InstrTy *>(this)->hasDescriptor())
1618 uint8_t *BytesEnd = static_cast<InstrTy *>(this)->getDescriptor().end();
1619 return reinterpret_cast<bundle_op_iterator>(BytesEnd);
1622 /// Return the end of the list of BundleOpInfo instances associated
1623 /// with this OperandBundleUser.
1624 const_bundle_op_iterator bundle_op_info_end() const {
1625 auto *NonConstThis =
1626 const_cast<OperandBundleUser<InstrTy, OpIteratorTy> *>(this);
1627 return NonConstThis->bundle_op_info_end();
1630 /// Return the range [\p bundle_op_info_begin, \p bundle_op_info_end).
1631 iterator_range<bundle_op_iterator> bundle_op_infos() {
1632 return make_range(bundle_op_info_begin(), bundle_op_info_end());
1635 /// Return the range [\p bundle_op_info_begin, \p bundle_op_info_end).
1636 iterator_range<const_bundle_op_iterator> bundle_op_infos() const {
1637 return make_range(bundle_op_info_begin(), bundle_op_info_end());
1640 /// Populate the BundleOpInfo instances and the Use& vector from \p
1641 /// Bundles. Return the op_iterator pointing to the Use& one past the last
1642 /// last bundle operand use.
1644 /// Each \p OperandBundleDef instance is tracked by a OperandBundleInfo
1645 /// instance allocated in this User's descriptor.
1646 OpIteratorTy populateBundleOperandInfos(ArrayRef<OperandBundleDef> Bundles,
1647 const unsigned BeginIndex) {
1648 auto It = static_cast<InstrTy *>(this)->op_begin() + BeginIndex;
1649 for (auto &B : Bundles)
1650 It = std::copy(B.input_begin(), B.input_end(), It);
1652 auto *ContextImpl = static_cast<InstrTy *>(this)->getContext().pImpl;
1653 auto BI = Bundles.begin();
1654 unsigned CurrentIndex = BeginIndex;
1656 for (auto &BOI : bundle_op_infos()) {
1657 assert(BI != Bundles.end() && "Incorrect allocation?");
1659 BOI.Tag = ContextImpl->getOrInsertBundleTag(BI->getTag());
1660 BOI.Begin = CurrentIndex;
1661 BOI.End = CurrentIndex + BI->input_size();
1662 CurrentIndex = BOI.End;
1666 assert(BI == Bundles.end() && "Incorrect allocation?");
1671 /// Return the BundleOpInfo for the operand at index OpIdx.
1673 /// It is an error to call this with an OpIdx that does not correspond to an
1675 const BundleOpInfo &getBundleOpInfoForOperand(unsigned OpIdx) const {
1676 for (auto &BOI : bundle_op_infos())
1677 if (BOI.Begin <= OpIdx && OpIdx < BOI.End)
1680 llvm_unreachable("Did not find operand bundle for operand!");
1683 /// Return the total number of values used in \p Bundles.
1684 static unsigned CountBundleInputs(ArrayRef<OperandBundleDef> Bundles) {
1686 for (auto &B : Bundles)
1687 Total += B.input_size();
1692 } // end namespace llvm
1694 #endif // LLVM_IR_INSTRTYPES_H