1 //===-- Constants.cpp - Implement Constant nodes --------------------------===//
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 implements the Constant* classes...
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Constants.h"
15 #include "LLVMContextImpl.h"
16 #include "ConstantFold.h"
17 #include "llvm/DerivedTypes.h"
18 #include "llvm/GlobalValue.h"
19 #include "llvm/Instructions.h"
20 #include "llvm/Module.h"
21 #include "llvm/Operator.h"
22 #include "llvm/ADT/FoldingSet.h"
23 #include "llvm/ADT/StringExtras.h"
24 #include "llvm/ADT/StringMap.h"
25 #include "llvm/Support/Compiler.h"
26 #include "llvm/Support/Debug.h"
27 #include "llvm/Support/ErrorHandling.h"
28 #include "llvm/Support/ManagedStatic.h"
29 #include "llvm/Support/MathExtras.h"
30 #include "llvm/Support/raw_ostream.h"
31 #include "llvm/Support/GetElementPtrTypeIterator.h"
32 #include "llvm/System/Mutex.h"
33 #include "llvm/System/RWMutex.h"
34 #include "llvm/System/Threading.h"
35 #include "llvm/ADT/DenseMap.h"
36 #include "llvm/ADT/SmallVector.h"
41 //===----------------------------------------------------------------------===//
43 //===----------------------------------------------------------------------===//
45 // Constructor to create a '0' constant of arbitrary type...
46 static const uint64_t zero[2] = {0, 0};
47 Constant* Constant::getNullValue(const Type* Ty) {
48 switch (Ty->getTypeID()) {
49 case Type::IntegerTyID:
50 return ConstantInt::get(Ty, 0);
52 return ConstantFP::get(Ty->getContext(), APFloat(APInt(32, 0)));
53 case Type::DoubleTyID:
54 return ConstantFP::get(Ty->getContext(), APFloat(APInt(64, 0)));
55 case Type::X86_FP80TyID:
56 return ConstantFP::get(Ty->getContext(), APFloat(APInt(80, 2, zero)));
58 return ConstantFP::get(Ty->getContext(),
59 APFloat(APInt(128, 2, zero), true));
60 case Type::PPC_FP128TyID:
61 return ConstantFP::get(Ty->getContext(), APFloat(APInt(128, 2, zero)));
62 case Type::PointerTyID:
63 return ConstantPointerNull::get(cast<PointerType>(Ty));
64 case Type::StructTyID:
66 case Type::VectorTyID:
67 return ConstantAggregateZero::get(Ty);
69 // Function, Label, or Opaque type?
70 assert(!"Cannot create a null constant of that type!");
75 Constant* Constant::getIntegerValue(const Type* Ty, const APInt &V) {
76 const Type *ScalarTy = Ty->getScalarType();
78 // Create the base integer constant.
79 Constant *C = ConstantInt::get(Ty->getContext(), V);
81 // Convert an integer to a pointer, if necessary.
82 if (const PointerType *PTy = dyn_cast<PointerType>(ScalarTy))
83 C = ConstantExpr::getIntToPtr(C, PTy);
85 // Broadcast a scalar to a vector, if necessary.
86 if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
87 C = ConstantVector::get(std::vector<Constant *>(VTy->getNumElements(), C));
92 Constant* Constant::getAllOnesValue(const Type* Ty) {
93 if (const IntegerType* ITy = dyn_cast<IntegerType>(Ty))
94 return ConstantInt::get(Ty->getContext(),
95 APInt::getAllOnesValue(ITy->getBitWidth()));
97 std::vector<Constant*> Elts;
98 const VectorType* VTy = cast<VectorType>(Ty);
99 Elts.resize(VTy->getNumElements(), getAllOnesValue(VTy->getElementType()));
100 assert(Elts[0] && "Not a vector integer type!");
101 return cast<ConstantVector>(ConstantVector::get(Elts));
104 void Constant::destroyConstantImpl() {
105 // When a Constant is destroyed, there may be lingering
106 // references to the constant by other constants in the constant pool. These
107 // constants are implicitly dependent on the module that is being deleted,
108 // but they don't know that. Because we only find out when the CPV is
109 // deleted, we must now notify all of our users (that should only be
110 // Constants) that they are, in fact, invalid now and should be deleted.
112 while (!use_empty()) {
113 Value *V = use_back();
114 #ifndef NDEBUG // Only in -g mode...
115 if (!isa<Constant>(V)) {
116 errs() << "While deleting: " << *this
117 << "\n\nUse still stuck around after Def is destroyed: "
121 assert(isa<Constant>(V) && "References remain to Constant being destroyed");
122 Constant *CV = cast<Constant>(V);
123 CV->destroyConstant();
125 // The constant should remove itself from our use list...
126 assert((use_empty() || use_back() != V) && "Constant not removed!");
129 // Value has no outstanding references it is safe to delete it now...
133 /// canTrap - Return true if evaluation of this constant could trap. This is
134 /// true for things like constant expressions that could divide by zero.
135 bool Constant::canTrap() const {
136 assert(getType()->isFirstClassType() && "Cannot evaluate aggregate vals!");
137 // The only thing that could possibly trap are constant exprs.
138 const ConstantExpr *CE = dyn_cast<ConstantExpr>(this);
139 if (!CE) return false;
141 // ConstantExpr traps if any operands can trap.
142 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
143 if (getOperand(i)->canTrap())
146 // Otherwise, only specific operations can trap.
147 switch (CE->getOpcode()) {
150 case Instruction::UDiv:
151 case Instruction::SDiv:
152 case Instruction::FDiv:
153 case Instruction::URem:
154 case Instruction::SRem:
155 case Instruction::FRem:
156 // Div and rem can trap if the RHS is not known to be non-zero.
157 if (!isa<ConstantInt>(getOperand(1)) || getOperand(1)->isNullValue())
164 /// getRelocationInfo - This method classifies the entry according to
165 /// whether or not it may generate a relocation entry. This must be
166 /// conservative, so if it might codegen to a relocatable entry, it should say
167 /// so. The return values are:
169 /// NoRelocation: This constant pool entry is guaranteed to never have a
170 /// relocation applied to it (because it holds a simple constant like
172 /// LocalRelocation: This entry has relocations, but the entries are
173 /// guaranteed to be resolvable by the static linker, so the dynamic
174 /// linker will never see them.
175 /// GlobalRelocations: This entry may have arbitrary relocations.
177 /// FIXME: This really should not be in VMCore.
178 Constant::PossibleRelocationsTy Constant::getRelocationInfo() const {
179 if (const GlobalValue *GV = dyn_cast<GlobalValue>(this)) {
180 if (GV->hasLocalLinkage() || GV->hasHiddenVisibility())
181 return LocalRelocation; // Local to this file/library.
182 return GlobalRelocations; // Global reference.
185 PossibleRelocationsTy Result = NoRelocation;
186 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
187 Result = std::max(Result, getOperand(i)->getRelocationInfo());
193 /// getVectorElements - This method, which is only valid on constant of vector
194 /// type, returns the elements of the vector in the specified smallvector.
195 /// This handles breaking down a vector undef into undef elements, etc. For
196 /// constant exprs and other cases we can't handle, we return an empty vector.
197 void Constant::getVectorElements(LLVMContext &Context,
198 SmallVectorImpl<Constant*> &Elts) const {
199 assert(isa<VectorType>(getType()) && "Not a vector constant!");
201 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this)) {
202 for (unsigned i = 0, e = CV->getNumOperands(); i != e; ++i)
203 Elts.push_back(CV->getOperand(i));
207 const VectorType *VT = cast<VectorType>(getType());
208 if (isa<ConstantAggregateZero>(this)) {
209 Elts.assign(VT->getNumElements(),
210 Constant::getNullValue(VT->getElementType()));
214 if (isa<UndefValue>(this)) {
215 Elts.assign(VT->getNumElements(), UndefValue::get(VT->getElementType()));
219 // Unknown type, must be constant expr etc.
224 //===----------------------------------------------------------------------===//
226 //===----------------------------------------------------------------------===//
228 ConstantInt::ConstantInt(const IntegerType *Ty, const APInt& V)
229 : Constant(Ty, ConstantIntVal, 0, 0), Val(V) {
230 assert(V.getBitWidth() == Ty->getBitWidth() && "Invalid constant for type");
233 ConstantInt* ConstantInt::getTrue(LLVMContext &Context) {
234 LLVMContextImpl *pImpl = Context.pImpl;
235 sys::SmartScopedWriter<true>(pImpl->ConstantsLock);
236 if (pImpl->TheTrueVal)
237 return pImpl->TheTrueVal;
239 return (pImpl->TheTrueVal =
240 ConstantInt::get(IntegerType::get(Context, 1), 1));
243 ConstantInt* ConstantInt::getFalse(LLVMContext &Context) {
244 LLVMContextImpl *pImpl = Context.pImpl;
245 sys::SmartScopedWriter<true>(pImpl->ConstantsLock);
246 if (pImpl->TheFalseVal)
247 return pImpl->TheFalseVal;
249 return (pImpl->TheFalseVal =
250 ConstantInt::get(IntegerType::get(Context, 1), 0));
254 // Get a ConstantInt from an APInt. Note that the value stored in the DenseMap
255 // as the key, is a DenseMapAPIntKeyInfo::KeyTy which has provided the
256 // operator== and operator!= to ensure that the DenseMap doesn't attempt to
257 // compare APInt's of different widths, which would violate an APInt class
258 // invariant which generates an assertion.
259 ConstantInt *ConstantInt::get(LLVMContext &Context, const APInt& V) {
260 // Get the corresponding integer type for the bit width of the value.
261 const IntegerType *ITy = IntegerType::get(Context, V.getBitWidth());
262 // get an existing value or the insertion position
263 DenseMapAPIntKeyInfo::KeyTy Key(V, ITy);
265 Context.pImpl->ConstantsLock.reader_acquire();
266 ConstantInt *&Slot = Context.pImpl->IntConstants[Key];
267 Context.pImpl->ConstantsLock.reader_release();
270 sys::SmartScopedWriter<true> Writer(Context.pImpl->ConstantsLock);
271 ConstantInt *&NewSlot = Context.pImpl->IntConstants[Key];
273 NewSlot = new ConstantInt(ITy, V);
282 Constant* ConstantInt::get(const Type* Ty, uint64_t V, bool isSigned) {
283 Constant *C = get(cast<IntegerType>(Ty->getScalarType()),
286 // For vectors, broadcast the value.
287 if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
288 return ConstantVector::get(
289 std::vector<Constant *>(VTy->getNumElements(), C));
294 ConstantInt* ConstantInt::get(const IntegerType* Ty, uint64_t V,
296 return get(Ty->getContext(), APInt(Ty->getBitWidth(), V, isSigned));
299 ConstantInt* ConstantInt::getSigned(const IntegerType* Ty, int64_t V) {
300 return get(Ty, V, true);
303 Constant *ConstantInt::getSigned(const Type *Ty, int64_t V) {
304 return get(Ty, V, true);
307 Constant* ConstantInt::get(const Type* Ty, const APInt& V) {
308 ConstantInt *C = get(Ty->getContext(), V);
309 assert(C->getType() == Ty->getScalarType() &&
310 "ConstantInt type doesn't match the type implied by its value!");
312 // For vectors, broadcast the value.
313 if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
314 return ConstantVector::get(
315 std::vector<Constant *>(VTy->getNumElements(), C));
320 ConstantInt* ConstantInt::get(const IntegerType* Ty, const StringRef& Str,
322 return get(Ty->getContext(), APInt(Ty->getBitWidth(), Str, radix));
325 //===----------------------------------------------------------------------===//
327 //===----------------------------------------------------------------------===//
329 static const fltSemantics *TypeToFloatSemantics(const Type *Ty) {
331 return &APFloat::IEEEsingle;
332 if (Ty->isDoubleTy())
333 return &APFloat::IEEEdouble;
334 if (Ty->isX86_FP80Ty())
335 return &APFloat::x87DoubleExtended;
336 else if (Ty->isFP128Ty())
337 return &APFloat::IEEEquad;
339 assert(Ty->isPPC_FP128Ty() && "Unknown FP format");
340 return &APFloat::PPCDoubleDouble;
343 /// get() - This returns a constant fp for the specified value in the
344 /// specified type. This should only be used for simple constant values like
345 /// 2.0/1.0 etc, that are known-valid both as double and as the target format.
346 Constant* ConstantFP::get(const Type* Ty, double V) {
347 LLVMContext &Context = Ty->getContext();
351 FV.convert(*TypeToFloatSemantics(Ty->getScalarType()),
352 APFloat::rmNearestTiesToEven, &ignored);
353 Constant *C = get(Context, FV);
355 // For vectors, broadcast the value.
356 if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
357 return ConstantVector::get(
358 std::vector<Constant *>(VTy->getNumElements(), C));
364 Constant* ConstantFP::get(const Type* Ty, const StringRef& Str) {
365 LLVMContext &Context = Ty->getContext();
367 APFloat FV(*TypeToFloatSemantics(Ty->getScalarType()), Str);
368 Constant *C = get(Context, FV);
370 // For vectors, broadcast the value.
371 if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
372 return ConstantVector::get(
373 std::vector<Constant *>(VTy->getNumElements(), C));
379 ConstantFP* ConstantFP::getNegativeZero(const Type* Ty) {
380 LLVMContext &Context = Ty->getContext();
381 APFloat apf = cast <ConstantFP>(Constant::getNullValue(Ty))->getValueAPF();
383 return get(Context, apf);
387 Constant* ConstantFP::getZeroValueForNegation(const Type* Ty) {
388 if (const VectorType *PTy = dyn_cast<VectorType>(Ty))
389 if (PTy->getElementType()->isFloatingPoint()) {
390 std::vector<Constant*> zeros(PTy->getNumElements(),
391 getNegativeZero(PTy->getElementType()));
392 return ConstantVector::get(PTy, zeros);
395 if (Ty->isFloatingPoint())
396 return getNegativeZero(Ty);
398 return Constant::getNullValue(Ty);
402 // ConstantFP accessors.
403 ConstantFP* ConstantFP::get(LLVMContext &Context, const APFloat& V) {
404 DenseMapAPFloatKeyInfo::KeyTy Key(V);
406 LLVMContextImpl* pImpl = Context.pImpl;
408 pImpl->ConstantsLock.reader_acquire();
409 ConstantFP *&Slot = pImpl->FPConstants[Key];
410 pImpl->ConstantsLock.reader_release();
413 sys::SmartScopedWriter<true> Writer(pImpl->ConstantsLock);
414 ConstantFP *&NewSlot = pImpl->FPConstants[Key];
417 if (&V.getSemantics() == &APFloat::IEEEsingle)
418 Ty = Type::getFloatTy(Context);
419 else if (&V.getSemantics() == &APFloat::IEEEdouble)
420 Ty = Type::getDoubleTy(Context);
421 else if (&V.getSemantics() == &APFloat::x87DoubleExtended)
422 Ty = Type::getX86_FP80Ty(Context);
423 else if (&V.getSemantics() == &APFloat::IEEEquad)
424 Ty = Type::getFP128Ty(Context);
426 assert(&V.getSemantics() == &APFloat::PPCDoubleDouble &&
427 "Unknown FP format");
428 Ty = Type::getPPC_FP128Ty(Context);
430 NewSlot = new ConstantFP(Ty, V);
439 ConstantFP *ConstantFP::getInfinity(const Type *Ty, bool Negative) {
440 const fltSemantics &Semantics = *TypeToFloatSemantics(Ty);
441 return ConstantFP::get(Ty->getContext(),
442 APFloat::getInf(Semantics, Negative));
445 ConstantFP::ConstantFP(const Type *Ty, const APFloat& V)
446 : Constant(Ty, ConstantFPVal, 0, 0), Val(V) {
447 assert(&V.getSemantics() == TypeToFloatSemantics(Ty) &&
451 bool ConstantFP::isNullValue() const {
452 return Val.isZero() && !Val.isNegative();
455 bool ConstantFP::isExactlyValue(const APFloat& V) const {
456 return Val.bitwiseIsEqual(V);
459 //===----------------------------------------------------------------------===//
460 // ConstantXXX Classes
461 //===----------------------------------------------------------------------===//
464 ConstantArray::ConstantArray(const ArrayType *T,
465 const std::vector<Constant*> &V)
466 : Constant(T, ConstantArrayVal,
467 OperandTraits<ConstantArray>::op_end(this) - V.size(),
469 assert(V.size() == T->getNumElements() &&
470 "Invalid initializer vector for constant array");
471 Use *OL = OperandList;
472 for (std::vector<Constant*>::const_iterator I = V.begin(), E = V.end();
475 assert(C->getType() == T->getElementType() &&
476 "Initializer for array element doesn't match array element type!");
481 Constant *ConstantArray::get(const ArrayType *Ty,
482 const std::vector<Constant*> &V) {
483 for (unsigned i = 0, e = V.size(); i != e; ++i) {
484 assert(V[i]->getType() == Ty->getElementType() &&
485 "Wrong type in array element initializer");
487 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
488 // If this is an all-zero array, return a ConstantAggregateZero object
491 if (!C->isNullValue()) {
492 // Implicitly locked.
493 return pImpl->ArrayConstants.getOrCreate(Ty, V);
495 for (unsigned i = 1, e = V.size(); i != e; ++i)
497 // Implicitly locked.
498 return pImpl->ArrayConstants.getOrCreate(Ty, V);
502 return ConstantAggregateZero::get(Ty);
506 Constant* ConstantArray::get(const ArrayType* T, Constant* const* Vals,
508 // FIXME: make this the primary ctor method.
509 return get(T, std::vector<Constant*>(Vals, Vals+NumVals));
512 /// ConstantArray::get(const string&) - Return an array that is initialized to
513 /// contain the specified string. If length is zero then a null terminator is
514 /// added to the specified string so that it may be used in a natural way.
515 /// Otherwise, the length parameter specifies how much of the string to use
516 /// and it won't be null terminated.
518 Constant* ConstantArray::get(LLVMContext &Context, const StringRef &Str,
520 std::vector<Constant*> ElementVals;
521 for (unsigned i = 0; i < Str.size(); ++i)
522 ElementVals.push_back(ConstantInt::get(Type::getInt8Ty(Context), Str[i]));
524 // Add a null terminator to the string...
526 ElementVals.push_back(ConstantInt::get(Type::getInt8Ty(Context), 0));
529 ArrayType *ATy = ArrayType::get(Type::getInt8Ty(Context), ElementVals.size());
530 return get(ATy, ElementVals);
535 ConstantStruct::ConstantStruct(const StructType *T,
536 const std::vector<Constant*> &V)
537 : Constant(T, ConstantStructVal,
538 OperandTraits<ConstantStruct>::op_end(this) - V.size(),
540 assert(V.size() == T->getNumElements() &&
541 "Invalid initializer vector for constant structure");
542 Use *OL = OperandList;
543 for (std::vector<Constant*>::const_iterator I = V.begin(), E = V.end();
546 assert(C->getType() == T->getElementType(I-V.begin()) &&
547 "Initializer for struct element doesn't match struct element type!");
552 // ConstantStruct accessors.
553 Constant* ConstantStruct::get(const StructType* T,
554 const std::vector<Constant*>& V) {
555 LLVMContextImpl* pImpl = T->getContext().pImpl;
557 // Create a ConstantAggregateZero value if all elements are zeros...
558 for (unsigned i = 0, e = V.size(); i != e; ++i)
559 if (!V[i]->isNullValue())
560 // Implicitly locked.
561 return pImpl->StructConstants.getOrCreate(T, V);
563 return ConstantAggregateZero::get(T);
566 Constant* ConstantStruct::get(LLVMContext &Context,
567 const std::vector<Constant*>& V, bool packed) {
568 std::vector<const Type*> StructEls;
569 StructEls.reserve(V.size());
570 for (unsigned i = 0, e = V.size(); i != e; ++i)
571 StructEls.push_back(V[i]->getType());
572 return get(StructType::get(Context, StructEls, packed), V);
575 Constant* ConstantStruct::get(LLVMContext &Context,
576 Constant* const *Vals, unsigned NumVals,
578 // FIXME: make this the primary ctor method.
579 return get(Context, std::vector<Constant*>(Vals, Vals+NumVals), Packed);
582 ConstantVector::ConstantVector(const VectorType *T,
583 const std::vector<Constant*> &V)
584 : Constant(T, ConstantVectorVal,
585 OperandTraits<ConstantVector>::op_end(this) - V.size(),
587 Use *OL = OperandList;
588 for (std::vector<Constant*>::const_iterator I = V.begin(), E = V.end();
591 assert(C->getType() == T->getElementType() &&
592 "Initializer for vector element doesn't match vector element type!");
597 // ConstantVector accessors.
598 Constant* ConstantVector::get(const VectorType* T,
599 const std::vector<Constant*>& V) {
600 assert(!V.empty() && "Vectors can't be empty");
601 LLVMContext &Context = T->getContext();
602 LLVMContextImpl *pImpl = Context.pImpl;
604 // If this is an all-undef or alll-zero vector, return a
605 // ConstantAggregateZero or UndefValue.
607 bool isZero = C->isNullValue();
608 bool isUndef = isa<UndefValue>(C);
610 if (isZero || isUndef) {
611 for (unsigned i = 1, e = V.size(); i != e; ++i)
613 isZero = isUndef = false;
619 return ConstantAggregateZero::get(T);
621 return UndefValue::get(T);
623 // Implicitly locked.
624 return pImpl->VectorConstants.getOrCreate(T, V);
627 Constant* ConstantVector::get(const std::vector<Constant*>& V) {
628 assert(!V.empty() && "Cannot infer type if V is empty");
629 return get(VectorType::get(V.front()->getType(),V.size()), V);
632 Constant* ConstantVector::get(Constant* const* Vals, unsigned NumVals) {
633 // FIXME: make this the primary ctor method.
634 return get(std::vector<Constant*>(Vals, Vals+NumVals));
637 Constant* ConstantExpr::getNSWAdd(Constant* C1, Constant* C2) {
638 return getTy(C1->getType(), Instruction::Add, C1, C2,
639 OverflowingBinaryOperator::NoSignedWrap);
642 Constant* ConstantExpr::getNSWSub(Constant* C1, Constant* C2) {
643 return getTy(C1->getType(), Instruction::Sub, C1, C2,
644 OverflowingBinaryOperator::NoSignedWrap);
647 Constant* ConstantExpr::getExactSDiv(Constant* C1, Constant* C2) {
648 return getTy(C1->getType(), Instruction::SDiv, C1, C2,
649 SDivOperator::IsExact);
652 // Utility function for determining if a ConstantExpr is a CastOp or not. This
653 // can't be inline because we don't want to #include Instruction.h into
655 bool ConstantExpr::isCast() const {
656 return Instruction::isCast(getOpcode());
659 bool ConstantExpr::isCompare() const {
660 return getOpcode() == Instruction::ICmp || getOpcode() == Instruction::FCmp;
663 bool ConstantExpr::isGEPWithNoNotionalOverIndexing() const {
664 if (getOpcode() != Instruction::GetElementPtr) return false;
666 gep_type_iterator GEPI = gep_type_begin(this), E = gep_type_end(this);
667 User::const_op_iterator OI = next(this->op_begin());
669 // Skip the first index, as it has no static limit.
673 // The remaining indices must be compile-time known integers within the
674 // bounds of the corresponding notional static array types.
675 for (; GEPI != E; ++GEPI, ++OI) {
676 ConstantInt *CI = dyn_cast<ConstantInt>(*OI);
677 if (!CI) return false;
678 if (const ArrayType *ATy = dyn_cast<ArrayType>(*GEPI))
679 if (CI->getValue().getActiveBits() > 64 ||
680 CI->getZExtValue() >= ATy->getNumElements())
684 // All the indices checked out.
688 bool ConstantExpr::hasIndices() const {
689 return getOpcode() == Instruction::ExtractValue ||
690 getOpcode() == Instruction::InsertValue;
693 const SmallVector<unsigned, 4> &ConstantExpr::getIndices() const {
694 if (const ExtractValueConstantExpr *EVCE =
695 dyn_cast<ExtractValueConstantExpr>(this))
696 return EVCE->Indices;
698 return cast<InsertValueConstantExpr>(this)->Indices;
701 unsigned ConstantExpr::getPredicate() const {
702 assert(getOpcode() == Instruction::FCmp ||
703 getOpcode() == Instruction::ICmp);
704 return ((const CompareConstantExpr*)this)->predicate;
707 /// getWithOperandReplaced - Return a constant expression identical to this
708 /// one, but with the specified operand set to the specified value.
710 ConstantExpr::getWithOperandReplaced(unsigned OpNo, Constant *Op) const {
711 assert(OpNo < getNumOperands() && "Operand num is out of range!");
712 assert(Op->getType() == getOperand(OpNo)->getType() &&
713 "Replacing operand with value of different type!");
714 if (getOperand(OpNo) == Op)
715 return const_cast<ConstantExpr*>(this);
717 Constant *Op0, *Op1, *Op2;
718 switch (getOpcode()) {
719 case Instruction::Trunc:
720 case Instruction::ZExt:
721 case Instruction::SExt:
722 case Instruction::FPTrunc:
723 case Instruction::FPExt:
724 case Instruction::UIToFP:
725 case Instruction::SIToFP:
726 case Instruction::FPToUI:
727 case Instruction::FPToSI:
728 case Instruction::PtrToInt:
729 case Instruction::IntToPtr:
730 case Instruction::BitCast:
731 return ConstantExpr::getCast(getOpcode(), Op, getType());
732 case Instruction::Select:
733 Op0 = (OpNo == 0) ? Op : getOperand(0);
734 Op1 = (OpNo == 1) ? Op : getOperand(1);
735 Op2 = (OpNo == 2) ? Op : getOperand(2);
736 return ConstantExpr::getSelect(Op0, Op1, Op2);
737 case Instruction::InsertElement:
738 Op0 = (OpNo == 0) ? Op : getOperand(0);
739 Op1 = (OpNo == 1) ? Op : getOperand(1);
740 Op2 = (OpNo == 2) ? Op : getOperand(2);
741 return ConstantExpr::getInsertElement(Op0, Op1, Op2);
742 case Instruction::ExtractElement:
743 Op0 = (OpNo == 0) ? Op : getOperand(0);
744 Op1 = (OpNo == 1) ? Op : getOperand(1);
745 return ConstantExpr::getExtractElement(Op0, Op1);
746 case Instruction::ShuffleVector:
747 Op0 = (OpNo == 0) ? Op : getOperand(0);
748 Op1 = (OpNo == 1) ? Op : getOperand(1);
749 Op2 = (OpNo == 2) ? Op : getOperand(2);
750 return ConstantExpr::getShuffleVector(Op0, Op1, Op2);
751 case Instruction::GetElementPtr: {
752 SmallVector<Constant*, 8> Ops;
753 Ops.resize(getNumOperands()-1);
754 for (unsigned i = 1, e = getNumOperands(); i != e; ++i)
755 Ops[i-1] = getOperand(i);
757 return cast<GEPOperator>(this)->isInBounds() ?
758 ConstantExpr::getInBoundsGetElementPtr(Op, &Ops[0], Ops.size()) :
759 ConstantExpr::getGetElementPtr(Op, &Ops[0], Ops.size());
761 return cast<GEPOperator>(this)->isInBounds() ?
762 ConstantExpr::getInBoundsGetElementPtr(getOperand(0), &Ops[0], Ops.size()) :
763 ConstantExpr::getGetElementPtr(getOperand(0), &Ops[0], Ops.size());
766 assert(getNumOperands() == 2 && "Must be binary operator?");
767 Op0 = (OpNo == 0) ? Op : getOperand(0);
768 Op1 = (OpNo == 1) ? Op : getOperand(1);
769 return ConstantExpr::get(getOpcode(), Op0, Op1, SubclassData);
773 /// getWithOperands - This returns the current constant expression with the
774 /// operands replaced with the specified values. The specified operands must
775 /// match count and type with the existing ones.
776 Constant *ConstantExpr::
777 getWithOperands(Constant* const *Ops, unsigned NumOps) const {
778 assert(NumOps == getNumOperands() && "Operand count mismatch!");
779 bool AnyChange = false;
780 for (unsigned i = 0; i != NumOps; ++i) {
781 assert(Ops[i]->getType() == getOperand(i)->getType() &&
782 "Operand type mismatch!");
783 AnyChange |= Ops[i] != getOperand(i);
785 if (!AnyChange) // No operands changed, return self.
786 return const_cast<ConstantExpr*>(this);
788 switch (getOpcode()) {
789 case Instruction::Trunc:
790 case Instruction::ZExt:
791 case Instruction::SExt:
792 case Instruction::FPTrunc:
793 case Instruction::FPExt:
794 case Instruction::UIToFP:
795 case Instruction::SIToFP:
796 case Instruction::FPToUI:
797 case Instruction::FPToSI:
798 case Instruction::PtrToInt:
799 case Instruction::IntToPtr:
800 case Instruction::BitCast:
801 return ConstantExpr::getCast(getOpcode(), Ops[0], getType());
802 case Instruction::Select:
803 return ConstantExpr::getSelect(Ops[0], Ops[1], Ops[2]);
804 case Instruction::InsertElement:
805 return ConstantExpr::getInsertElement(Ops[0], Ops[1], Ops[2]);
806 case Instruction::ExtractElement:
807 return ConstantExpr::getExtractElement(Ops[0], Ops[1]);
808 case Instruction::ShuffleVector:
809 return ConstantExpr::getShuffleVector(Ops[0], Ops[1], Ops[2]);
810 case Instruction::GetElementPtr:
811 return cast<GEPOperator>(this)->isInBounds() ?
812 ConstantExpr::getInBoundsGetElementPtr(Ops[0], &Ops[1], NumOps-1) :
813 ConstantExpr::getGetElementPtr(Ops[0], &Ops[1], NumOps-1);
814 case Instruction::ICmp:
815 case Instruction::FCmp:
816 return ConstantExpr::getCompare(getPredicate(), Ops[0], Ops[1]);
818 assert(getNumOperands() == 2 && "Must be binary operator?");
819 return ConstantExpr::get(getOpcode(), Ops[0], Ops[1], SubclassData);
824 //===----------------------------------------------------------------------===//
825 // isValueValidForType implementations
827 bool ConstantInt::isValueValidForType(const Type *Ty, uint64_t Val) {
828 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth(); // assert okay
829 if (Ty == Type::getInt1Ty(Ty->getContext()))
830 return Val == 0 || Val == 1;
832 return true; // always true, has to fit in largest type
833 uint64_t Max = (1ll << NumBits) - 1;
837 bool ConstantInt::isValueValidForType(const Type *Ty, int64_t Val) {
838 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth(); // assert okay
839 if (Ty == Type::getInt1Ty(Ty->getContext()))
840 return Val == 0 || Val == 1 || Val == -1;
842 return true; // always true, has to fit in largest type
843 int64_t Min = -(1ll << (NumBits-1));
844 int64_t Max = (1ll << (NumBits-1)) - 1;
845 return (Val >= Min && Val <= Max);
848 bool ConstantFP::isValueValidForType(const Type *Ty, const APFloat& Val) {
849 // convert modifies in place, so make a copy.
850 APFloat Val2 = APFloat(Val);
852 switch (Ty->getTypeID()) {
854 return false; // These can't be represented as floating point!
856 // FIXME rounding mode needs to be more flexible
857 case Type::FloatTyID: {
858 if (&Val2.getSemantics() == &APFloat::IEEEsingle)
860 Val2.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, &losesInfo);
863 case Type::DoubleTyID: {
864 if (&Val2.getSemantics() == &APFloat::IEEEsingle ||
865 &Val2.getSemantics() == &APFloat::IEEEdouble)
867 Val2.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &losesInfo);
870 case Type::X86_FP80TyID:
871 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
872 &Val2.getSemantics() == &APFloat::IEEEdouble ||
873 &Val2.getSemantics() == &APFloat::x87DoubleExtended;
874 case Type::FP128TyID:
875 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
876 &Val2.getSemantics() == &APFloat::IEEEdouble ||
877 &Val2.getSemantics() == &APFloat::IEEEquad;
878 case Type::PPC_FP128TyID:
879 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
880 &Val2.getSemantics() == &APFloat::IEEEdouble ||
881 &Val2.getSemantics() == &APFloat::PPCDoubleDouble;
885 //===----------------------------------------------------------------------===//
886 // Factory Function Implementation
888 ConstantAggregateZero* ConstantAggregateZero::get(const Type* Ty) {
889 assert((isa<StructType>(Ty) || isa<ArrayType>(Ty) || isa<VectorType>(Ty)) &&
890 "Cannot create an aggregate zero of non-aggregate type!");
892 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
893 // Implicitly locked.
894 return pImpl->AggZeroConstants.getOrCreate(Ty, 0);
897 /// destroyConstant - Remove the constant from the constant table...
899 void ConstantAggregateZero::destroyConstant() {
900 // Implicitly locked.
901 getType()->getContext().pImpl->AggZeroConstants.remove(this);
902 destroyConstantImpl();
905 /// destroyConstant - Remove the constant from the constant table...
907 void ConstantArray::destroyConstant() {
908 // Implicitly locked.
909 getType()->getContext().pImpl->ArrayConstants.remove(this);
910 destroyConstantImpl();
913 /// isString - This method returns true if the array is an array of i8, and
914 /// if the elements of the array are all ConstantInt's.
915 bool ConstantArray::isString() const {
916 // Check the element type for i8...
917 if (getType()->getElementType() != Type::getInt8Ty(getContext()))
919 // Check the elements to make sure they are all integers, not constant
921 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
922 if (!isa<ConstantInt>(getOperand(i)))
927 /// isCString - This method returns true if the array is a string (see
928 /// isString) and it ends in a null byte \\0 and does not contains any other
929 /// null bytes except its terminator.
930 bool ConstantArray::isCString() const {
931 // Check the element type for i8...
932 if (getType()->getElementType() != Type::getInt8Ty(getContext()))
935 // Last element must be a null.
936 if (!getOperand(getNumOperands()-1)->isNullValue())
938 // Other elements must be non-null integers.
939 for (unsigned i = 0, e = getNumOperands()-1; i != e; ++i) {
940 if (!isa<ConstantInt>(getOperand(i)))
942 if (getOperand(i)->isNullValue())
949 /// getAsString - If the sub-element type of this array is i8
950 /// then this method converts the array to an std::string and returns it.
951 /// Otherwise, it asserts out.
953 std::string ConstantArray::getAsString() const {
954 assert(isString() && "Not a string!");
956 Result.reserve(getNumOperands());
957 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
958 Result.push_back((char)cast<ConstantInt>(getOperand(i))->getZExtValue());
963 //---- ConstantStruct::get() implementation...
970 // destroyConstant - Remove the constant from the constant table...
972 void ConstantStruct::destroyConstant() {
973 // Implicitly locked.
974 getType()->getContext().pImpl->StructConstants.remove(this);
975 destroyConstantImpl();
978 // destroyConstant - Remove the constant from the constant table...
980 void ConstantVector::destroyConstant() {
981 // Implicitly locked.
982 getType()->getContext().pImpl->VectorConstants.remove(this);
983 destroyConstantImpl();
986 /// This function will return true iff every element in this vector constant
987 /// is set to all ones.
988 /// @returns true iff this constant's emements are all set to all ones.
989 /// @brief Determine if the value is all ones.
990 bool ConstantVector::isAllOnesValue() const {
991 // Check out first element.
992 const Constant *Elt = getOperand(0);
993 const ConstantInt *CI = dyn_cast<ConstantInt>(Elt);
994 if (!CI || !CI->isAllOnesValue()) return false;
995 // Then make sure all remaining elements point to the same value.
996 for (unsigned I = 1, E = getNumOperands(); I < E; ++I) {
997 if (getOperand(I) != Elt) return false;
1002 /// getSplatValue - If this is a splat constant, where all of the
1003 /// elements have the same value, return that value. Otherwise return null.
1004 Constant *ConstantVector::getSplatValue() {
1005 // Check out first element.
1006 Constant *Elt = getOperand(0);
1007 // Then make sure all remaining elements point to the same value.
1008 for (unsigned I = 1, E = getNumOperands(); I < E; ++I)
1009 if (getOperand(I) != Elt) return 0;
1013 //---- ConstantPointerNull::get() implementation...
1016 ConstantPointerNull *ConstantPointerNull::get(const PointerType *Ty) {
1017 // Implicitly locked.
1018 return Ty->getContext().pImpl->NullPtrConstants.getOrCreate(Ty, 0);
1021 // destroyConstant - Remove the constant from the constant table...
1023 void ConstantPointerNull::destroyConstant() {
1024 // Implicitly locked.
1025 getType()->getContext().pImpl->NullPtrConstants.remove(this);
1026 destroyConstantImpl();
1030 //---- UndefValue::get() implementation...
1033 UndefValue *UndefValue::get(const Type *Ty) {
1034 // Implicitly locked.
1035 return Ty->getContext().pImpl->UndefValueConstants.getOrCreate(Ty, 0);
1038 // destroyConstant - Remove the constant from the constant table.
1040 void UndefValue::destroyConstant() {
1041 // Implicitly locked.
1042 getType()->getContext().pImpl->UndefValueConstants.remove(this);
1043 destroyConstantImpl();
1046 //---- ConstantExpr::get() implementations...
1049 /// This is a utility function to handle folding of casts and lookup of the
1050 /// cast in the ExprConstants map. It is used by the various get* methods below.
1051 static inline Constant *getFoldedCast(
1052 Instruction::CastOps opc, Constant *C, const Type *Ty) {
1053 assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
1054 // Fold a few common cases
1055 if (Constant *FC = ConstantFoldCastInstruction(Ty->getContext(), opc, C, Ty))
1058 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
1060 // Look up the constant in the table first to ensure uniqueness
1061 std::vector<Constant*> argVec(1, C);
1062 ExprMapKeyType Key(opc, argVec);
1064 // Implicitly locked.
1065 return pImpl->ExprConstants.getOrCreate(Ty, Key);
1068 Constant *ConstantExpr::getCast(unsigned oc, Constant *C, const Type *Ty) {
1069 Instruction::CastOps opc = Instruction::CastOps(oc);
1070 assert(Instruction::isCast(opc) && "opcode out of range");
1071 assert(C && Ty && "Null arguments to getCast");
1072 assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
1076 llvm_unreachable("Invalid cast opcode");
1078 case Instruction::Trunc: return getTrunc(C, Ty);
1079 case Instruction::ZExt: return getZExt(C, Ty);
1080 case Instruction::SExt: return getSExt(C, Ty);
1081 case Instruction::FPTrunc: return getFPTrunc(C, Ty);
1082 case Instruction::FPExt: return getFPExtend(C, Ty);
1083 case Instruction::UIToFP: return getUIToFP(C, Ty);
1084 case Instruction::SIToFP: return getSIToFP(C, Ty);
1085 case Instruction::FPToUI: return getFPToUI(C, Ty);
1086 case Instruction::FPToSI: return getFPToSI(C, Ty);
1087 case Instruction::PtrToInt: return getPtrToInt(C, Ty);
1088 case Instruction::IntToPtr: return getIntToPtr(C, Ty);
1089 case Instruction::BitCast: return getBitCast(C, Ty);
1094 Constant *ConstantExpr::getZExtOrBitCast(Constant *C, const Type *Ty) {
1095 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1096 return getCast(Instruction::BitCast, C, Ty);
1097 return getCast(Instruction::ZExt, C, Ty);
1100 Constant *ConstantExpr::getSExtOrBitCast(Constant *C, const Type *Ty) {
1101 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1102 return getCast(Instruction::BitCast, C, Ty);
1103 return getCast(Instruction::SExt, C, Ty);
1106 Constant *ConstantExpr::getTruncOrBitCast(Constant *C, const Type *Ty) {
1107 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1108 return getCast(Instruction::BitCast, C, Ty);
1109 return getCast(Instruction::Trunc, C, Ty);
1112 Constant *ConstantExpr::getPointerCast(Constant *S, const Type *Ty) {
1113 assert(isa<PointerType>(S->getType()) && "Invalid cast");
1114 assert((Ty->isInteger() || isa<PointerType>(Ty)) && "Invalid cast");
1116 if (Ty->isInteger())
1117 return getCast(Instruction::PtrToInt, S, Ty);
1118 return getCast(Instruction::BitCast, S, Ty);
1121 Constant *ConstantExpr::getIntegerCast(Constant *C, const Type *Ty,
1123 assert(C->getType()->isIntOrIntVector() &&
1124 Ty->isIntOrIntVector() && "Invalid cast");
1125 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1126 unsigned DstBits = Ty->getScalarSizeInBits();
1127 Instruction::CastOps opcode =
1128 (SrcBits == DstBits ? Instruction::BitCast :
1129 (SrcBits > DstBits ? Instruction::Trunc :
1130 (isSigned ? Instruction::SExt : Instruction::ZExt)));
1131 return getCast(opcode, C, Ty);
1134 Constant *ConstantExpr::getFPCast(Constant *C, const Type *Ty) {
1135 assert(C->getType()->isFPOrFPVector() && Ty->isFPOrFPVector() &&
1137 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1138 unsigned DstBits = Ty->getScalarSizeInBits();
1139 if (SrcBits == DstBits)
1140 return C; // Avoid a useless cast
1141 Instruction::CastOps opcode =
1142 (SrcBits > DstBits ? Instruction::FPTrunc : Instruction::FPExt);
1143 return getCast(opcode, C, Ty);
1146 Constant *ConstantExpr::getTrunc(Constant *C, const Type *Ty) {
1148 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1149 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1151 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1152 assert(C->getType()->isIntOrIntVector() && "Trunc operand must be integer");
1153 assert(Ty->isIntOrIntVector() && "Trunc produces only integral");
1154 assert(C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1155 "SrcTy must be larger than DestTy for Trunc!");
1157 return getFoldedCast(Instruction::Trunc, C, Ty);
1160 Constant *ConstantExpr::getSExt(Constant *C, const Type *Ty) {
1162 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1163 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1165 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1166 assert(C->getType()->isIntOrIntVector() && "SExt operand must be integral");
1167 assert(Ty->isIntOrIntVector() && "SExt produces only integer");
1168 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1169 "SrcTy must be smaller than DestTy for SExt!");
1171 return getFoldedCast(Instruction::SExt, C, Ty);
1174 Constant *ConstantExpr::getZExt(Constant *C, const Type *Ty) {
1176 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1177 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1179 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1180 assert(C->getType()->isIntOrIntVector() && "ZEXt operand must be integral");
1181 assert(Ty->isIntOrIntVector() && "ZExt produces only integer");
1182 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1183 "SrcTy must be smaller than DestTy for ZExt!");
1185 return getFoldedCast(Instruction::ZExt, C, Ty);
1188 Constant *ConstantExpr::getFPTrunc(Constant *C, const Type *Ty) {
1190 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1191 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1193 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1194 assert(C->getType()->isFPOrFPVector() && Ty->isFPOrFPVector() &&
1195 C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1196 "This is an illegal floating point truncation!");
1197 return getFoldedCast(Instruction::FPTrunc, C, Ty);
1200 Constant *ConstantExpr::getFPExtend(Constant *C, const Type *Ty) {
1202 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1203 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1205 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1206 assert(C->getType()->isFPOrFPVector() && Ty->isFPOrFPVector() &&
1207 C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1208 "This is an illegal floating point extension!");
1209 return getFoldedCast(Instruction::FPExt, C, Ty);
1212 Constant *ConstantExpr::getUIToFP(Constant *C, const Type *Ty) {
1214 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1215 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1217 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1218 assert(C->getType()->isIntOrIntVector() && Ty->isFPOrFPVector() &&
1219 "This is an illegal uint to floating point cast!");
1220 return getFoldedCast(Instruction::UIToFP, C, Ty);
1223 Constant *ConstantExpr::getSIToFP(Constant *C, const Type *Ty) {
1225 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1226 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1228 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1229 assert(C->getType()->isIntOrIntVector() && Ty->isFPOrFPVector() &&
1230 "This is an illegal sint to floating point cast!");
1231 return getFoldedCast(Instruction::SIToFP, C, Ty);
1234 Constant *ConstantExpr::getFPToUI(Constant *C, const Type *Ty) {
1236 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1237 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1239 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1240 assert(C->getType()->isFPOrFPVector() && Ty->isIntOrIntVector() &&
1241 "This is an illegal floating point to uint cast!");
1242 return getFoldedCast(Instruction::FPToUI, C, Ty);
1245 Constant *ConstantExpr::getFPToSI(Constant *C, const Type *Ty) {
1247 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1248 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1250 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1251 assert(C->getType()->isFPOrFPVector() && Ty->isIntOrIntVector() &&
1252 "This is an illegal floating point to sint cast!");
1253 return getFoldedCast(Instruction::FPToSI, C, Ty);
1256 Constant *ConstantExpr::getPtrToInt(Constant *C, const Type *DstTy) {
1257 assert(isa<PointerType>(C->getType()) && "PtrToInt source must be pointer");
1258 assert(DstTy->isInteger() && "PtrToInt destination must be integral");
1259 return getFoldedCast(Instruction::PtrToInt, C, DstTy);
1262 Constant *ConstantExpr::getIntToPtr(Constant *C, const Type *DstTy) {
1263 assert(C->getType()->isInteger() && "IntToPtr source must be integral");
1264 assert(isa<PointerType>(DstTy) && "IntToPtr destination must be a pointer");
1265 return getFoldedCast(Instruction::IntToPtr, C, DstTy);
1268 Constant *ConstantExpr::getBitCast(Constant *C, const Type *DstTy) {
1269 // BitCast implies a no-op cast of type only. No bits change. However, you
1270 // can't cast pointers to anything but pointers.
1272 const Type *SrcTy = C->getType();
1273 assert((isa<PointerType>(SrcTy) == isa<PointerType>(DstTy)) &&
1274 "BitCast cannot cast pointer to non-pointer and vice versa");
1276 // Now we know we're not dealing with mismatched pointer casts (ptr->nonptr
1277 // or nonptr->ptr). For all the other types, the cast is okay if source and
1278 // destination bit widths are identical.
1279 unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
1280 unsigned DstBitSize = DstTy->getPrimitiveSizeInBits();
1282 assert(SrcBitSize == DstBitSize && "BitCast requires types of same width");
1284 // It is common to ask for a bitcast of a value to its own type, handle this
1286 if (C->getType() == DstTy) return C;
1288 return getFoldedCast(Instruction::BitCast, C, DstTy);
1291 Constant *ConstantExpr::getTy(const Type *ReqTy, unsigned Opcode,
1292 Constant *C1, Constant *C2,
1294 // Check the operands for consistency first
1295 assert(Opcode >= Instruction::BinaryOpsBegin &&
1296 Opcode < Instruction::BinaryOpsEnd &&
1297 "Invalid opcode in binary constant expression");
1298 assert(C1->getType() == C2->getType() &&
1299 "Operand types in binary constant expression should match");
1301 if (ReqTy == C1->getType() || ReqTy == Type::getInt1Ty(ReqTy->getContext()))
1302 if (Constant *FC = ConstantFoldBinaryInstruction(ReqTy->getContext(),
1304 return FC; // Fold a few common cases...
1306 std::vector<Constant*> argVec(1, C1); argVec.push_back(C2);
1307 ExprMapKeyType Key(Opcode, argVec, 0, Flags);
1309 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1311 // Implicitly locked.
1312 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1315 Constant *ConstantExpr::getCompareTy(unsigned short predicate,
1316 Constant *C1, Constant *C2) {
1317 switch (predicate) {
1318 default: llvm_unreachable("Invalid CmpInst predicate");
1319 case CmpInst::FCMP_FALSE: case CmpInst::FCMP_OEQ: case CmpInst::FCMP_OGT:
1320 case CmpInst::FCMP_OGE: case CmpInst::FCMP_OLT: case CmpInst::FCMP_OLE:
1321 case CmpInst::FCMP_ONE: case CmpInst::FCMP_ORD: case CmpInst::FCMP_UNO:
1322 case CmpInst::FCMP_UEQ: case CmpInst::FCMP_UGT: case CmpInst::FCMP_UGE:
1323 case CmpInst::FCMP_ULT: case CmpInst::FCMP_ULE: case CmpInst::FCMP_UNE:
1324 case CmpInst::FCMP_TRUE:
1325 return getFCmp(predicate, C1, C2);
1327 case CmpInst::ICMP_EQ: case CmpInst::ICMP_NE: case CmpInst::ICMP_UGT:
1328 case CmpInst::ICMP_UGE: case CmpInst::ICMP_ULT: case CmpInst::ICMP_ULE:
1329 case CmpInst::ICMP_SGT: case CmpInst::ICMP_SGE: case CmpInst::ICMP_SLT:
1330 case CmpInst::ICMP_SLE:
1331 return getICmp(predicate, C1, C2);
1335 Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2,
1337 // API compatibility: Adjust integer opcodes to floating-point opcodes.
1338 if (C1->getType()->isFPOrFPVector()) {
1339 if (Opcode == Instruction::Add) Opcode = Instruction::FAdd;
1340 else if (Opcode == Instruction::Sub) Opcode = Instruction::FSub;
1341 else if (Opcode == Instruction::Mul) Opcode = Instruction::FMul;
1345 case Instruction::Add:
1346 case Instruction::Sub:
1347 case Instruction::Mul:
1348 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1349 assert(C1->getType()->isIntOrIntVector() &&
1350 "Tried to create an integer operation on a non-integer type!");
1352 case Instruction::FAdd:
1353 case Instruction::FSub:
1354 case Instruction::FMul:
1355 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1356 assert(C1->getType()->isFPOrFPVector() &&
1357 "Tried to create a floating-point operation on a "
1358 "non-floating-point type!");
1360 case Instruction::UDiv:
1361 case Instruction::SDiv:
1362 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1363 assert(C1->getType()->isIntOrIntVector() &&
1364 "Tried to create an arithmetic operation on a non-arithmetic type!");
1366 case Instruction::FDiv:
1367 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1368 assert(C1->getType()->isFPOrFPVector() &&
1369 "Tried to create an arithmetic operation on a non-arithmetic type!");
1371 case Instruction::URem:
1372 case Instruction::SRem:
1373 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1374 assert(C1->getType()->isIntOrIntVector() &&
1375 "Tried to create an arithmetic operation on a non-arithmetic type!");
1377 case Instruction::FRem:
1378 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1379 assert(C1->getType()->isFPOrFPVector() &&
1380 "Tried to create an arithmetic operation on a non-arithmetic type!");
1382 case Instruction::And:
1383 case Instruction::Or:
1384 case Instruction::Xor:
1385 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1386 assert(C1->getType()->isIntOrIntVector() &&
1387 "Tried to create a logical operation on a non-integral type!");
1389 case Instruction::Shl:
1390 case Instruction::LShr:
1391 case Instruction::AShr:
1392 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1393 assert(C1->getType()->isIntOrIntVector() &&
1394 "Tried to create a shift operation on a non-integer type!");
1401 return getTy(C1->getType(), Opcode, C1, C2, Flags);
1404 Constant* ConstantExpr::getSizeOf(const Type* Ty) {
1405 // sizeof is implemented as: (i64) gep (Ty*)null, 1
1406 // Note that a non-inbounds gep is used, as null isn't within any object.
1407 Constant *GEPIdx = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1408 Constant *GEP = getGetElementPtr(
1409 Constant::getNullValue(PointerType::getUnqual(Ty)), &GEPIdx, 1);
1410 return getCast(Instruction::PtrToInt, GEP,
1411 Type::getInt64Ty(Ty->getContext()));
1414 Constant* ConstantExpr::getAlignOf(const Type* Ty) {
1415 // alignof is implemented as: (i64) gep ({i8,Ty}*)null, 0, 1
1416 // Note that a non-inbounds gep is used, as null isn't within any object.
1417 const Type *AligningTy = StructType::get(Ty->getContext(),
1418 Type::getInt8Ty(Ty->getContext()), Ty, NULL);
1419 Constant *NullPtr = Constant::getNullValue(AligningTy->getPointerTo());
1420 Constant *Zero = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 0);
1421 Constant *One = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1422 Constant *Indices[2] = { Zero, One };
1423 Constant *GEP = getGetElementPtr(NullPtr, Indices, 2);
1424 return getCast(Instruction::PtrToInt, GEP,
1425 Type::getInt32Ty(Ty->getContext()));
1428 Constant* ConstantExpr::getOffsetOf(const StructType* STy, unsigned FieldNo) {
1429 // offsetof is implemented as: (i64) gep (Ty*)null, 0, FieldNo
1430 // Note that a non-inbounds gep is used, as null isn't within any object.
1431 Constant *GEPIdx[] = {
1432 ConstantInt::get(Type::getInt64Ty(STy->getContext()), 0),
1433 ConstantInt::get(Type::getInt32Ty(STy->getContext()), FieldNo)
1435 Constant *GEP = getGetElementPtr(
1436 Constant::getNullValue(PointerType::getUnqual(STy)), GEPIdx, 2);
1437 return getCast(Instruction::PtrToInt, GEP,
1438 Type::getInt64Ty(STy->getContext()));
1441 Constant *ConstantExpr::getCompare(unsigned short pred,
1442 Constant *C1, Constant *C2) {
1443 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1444 return getCompareTy(pred, C1, C2);
1447 Constant *ConstantExpr::getSelectTy(const Type *ReqTy, Constant *C,
1448 Constant *V1, Constant *V2) {
1449 assert(!SelectInst::areInvalidOperands(C, V1, V2)&&"Invalid select operands");
1451 if (ReqTy == V1->getType())
1452 if (Constant *SC = ConstantFoldSelectInstruction(
1453 ReqTy->getContext(), C, V1, V2))
1454 return SC; // Fold common cases
1456 std::vector<Constant*> argVec(3, C);
1459 ExprMapKeyType Key(Instruction::Select, argVec);
1461 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1463 // Implicitly locked.
1464 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1467 Constant *ConstantExpr::getGetElementPtrTy(const Type *ReqTy, Constant *C,
1470 assert(GetElementPtrInst::getIndexedType(C->getType(), Idxs,
1472 cast<PointerType>(ReqTy)->getElementType() &&
1473 "GEP indices invalid!");
1475 if (Constant *FC = ConstantFoldGetElementPtr(
1476 ReqTy->getContext(), C, /*inBounds=*/false,
1477 (Constant**)Idxs, NumIdx))
1478 return FC; // Fold a few common cases...
1480 assert(isa<PointerType>(C->getType()) &&
1481 "Non-pointer type for constant GetElementPtr expression");
1482 // Look up the constant in the table first to ensure uniqueness
1483 std::vector<Constant*> ArgVec;
1484 ArgVec.reserve(NumIdx+1);
1485 ArgVec.push_back(C);
1486 for (unsigned i = 0; i != NumIdx; ++i)
1487 ArgVec.push_back(cast<Constant>(Idxs[i]));
1488 const ExprMapKeyType Key(Instruction::GetElementPtr, ArgVec);
1490 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1492 // Implicitly locked.
1493 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1496 Constant *ConstantExpr::getInBoundsGetElementPtrTy(const Type *ReqTy,
1500 assert(GetElementPtrInst::getIndexedType(C->getType(), Idxs,
1502 cast<PointerType>(ReqTy)->getElementType() &&
1503 "GEP indices invalid!");
1505 if (Constant *FC = ConstantFoldGetElementPtr(
1506 ReqTy->getContext(), C, /*inBounds=*/true,
1507 (Constant**)Idxs, NumIdx))
1508 return FC; // Fold a few common cases...
1510 assert(isa<PointerType>(C->getType()) &&
1511 "Non-pointer type for constant GetElementPtr expression");
1512 // Look up the constant in the table first to ensure uniqueness
1513 std::vector<Constant*> ArgVec;
1514 ArgVec.reserve(NumIdx+1);
1515 ArgVec.push_back(C);
1516 for (unsigned i = 0; i != NumIdx; ++i)
1517 ArgVec.push_back(cast<Constant>(Idxs[i]));
1518 const ExprMapKeyType Key(Instruction::GetElementPtr, ArgVec, 0,
1519 GEPOperator::IsInBounds);
1521 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1523 // Implicitly locked.
1524 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1527 Constant *ConstantExpr::getGetElementPtr(Constant *C, Value* const *Idxs,
1529 // Get the result type of the getelementptr!
1531 GetElementPtrInst::getIndexedType(C->getType(), Idxs, Idxs+NumIdx);
1532 assert(Ty && "GEP indices invalid!");
1533 unsigned As = cast<PointerType>(C->getType())->getAddressSpace();
1534 return getGetElementPtrTy(PointerType::get(Ty, As), C, Idxs, NumIdx);
1537 Constant *ConstantExpr::getInBoundsGetElementPtr(Constant *C,
1540 // Get the result type of the getelementptr!
1542 GetElementPtrInst::getIndexedType(C->getType(), Idxs, Idxs+NumIdx);
1543 assert(Ty && "GEP indices invalid!");
1544 unsigned As = cast<PointerType>(C->getType())->getAddressSpace();
1545 return getInBoundsGetElementPtrTy(PointerType::get(Ty, As), C, Idxs, NumIdx);
1548 Constant *ConstantExpr::getGetElementPtr(Constant *C, Constant* const *Idxs,
1550 return getGetElementPtr(C, (Value* const *)Idxs, NumIdx);
1553 Constant *ConstantExpr::getInBoundsGetElementPtr(Constant *C,
1554 Constant* const *Idxs,
1556 return getInBoundsGetElementPtr(C, (Value* const *)Idxs, NumIdx);
1560 ConstantExpr::getICmp(unsigned short pred, Constant* LHS, Constant* RHS) {
1561 assert(LHS->getType() == RHS->getType());
1562 assert(pred >= ICmpInst::FIRST_ICMP_PREDICATE &&
1563 pred <= ICmpInst::LAST_ICMP_PREDICATE && "Invalid ICmp Predicate");
1565 if (Constant *FC = ConstantFoldCompareInstruction(
1566 LHS->getContext(), pred, LHS, RHS))
1567 return FC; // Fold a few common cases...
1569 // Look up the constant in the table first to ensure uniqueness
1570 std::vector<Constant*> ArgVec;
1571 ArgVec.push_back(LHS);
1572 ArgVec.push_back(RHS);
1573 // Get the key type with both the opcode and predicate
1574 const ExprMapKeyType Key(Instruction::ICmp, ArgVec, pred);
1576 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
1578 // Implicitly locked.
1580 pImpl->ExprConstants.getOrCreate(Type::getInt1Ty(LHS->getContext()), Key);
1584 ConstantExpr::getFCmp(unsigned short pred, Constant* LHS, Constant* RHS) {
1585 assert(LHS->getType() == RHS->getType());
1586 assert(pred <= FCmpInst::LAST_FCMP_PREDICATE && "Invalid FCmp Predicate");
1588 if (Constant *FC = ConstantFoldCompareInstruction(
1589 LHS->getContext(), pred, LHS, RHS))
1590 return FC; // Fold a few common cases...
1592 // Look up the constant in the table first to ensure uniqueness
1593 std::vector<Constant*> ArgVec;
1594 ArgVec.push_back(LHS);
1595 ArgVec.push_back(RHS);
1596 // Get the key type with both the opcode and predicate
1597 const ExprMapKeyType Key(Instruction::FCmp, ArgVec, pred);
1599 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
1601 // Implicitly locked.
1603 pImpl->ExprConstants.getOrCreate(Type::getInt1Ty(LHS->getContext()), Key);
1606 Constant *ConstantExpr::getExtractElementTy(const Type *ReqTy, Constant *Val,
1608 if (Constant *FC = ConstantFoldExtractElementInstruction(
1609 ReqTy->getContext(), Val, Idx))
1610 return FC; // Fold a few common cases...
1611 // Look up the constant in the table first to ensure uniqueness
1612 std::vector<Constant*> ArgVec(1, Val);
1613 ArgVec.push_back(Idx);
1614 const ExprMapKeyType Key(Instruction::ExtractElement,ArgVec);
1616 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1618 // Implicitly locked.
1619 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1622 Constant *ConstantExpr::getExtractElement(Constant *Val, Constant *Idx) {
1623 assert(isa<VectorType>(Val->getType()) &&
1624 "Tried to create extractelement operation on non-vector type!");
1625 assert(Idx->getType() == Type::getInt32Ty(Val->getContext()) &&
1626 "Extractelement index must be i32 type!");
1627 return getExtractElementTy(cast<VectorType>(Val->getType())->getElementType(),
1631 Constant *ConstantExpr::getInsertElementTy(const Type *ReqTy, Constant *Val,
1632 Constant *Elt, Constant *Idx) {
1633 if (Constant *FC = ConstantFoldInsertElementInstruction(
1634 ReqTy->getContext(), Val, Elt, Idx))
1635 return FC; // Fold a few common cases...
1636 // Look up the constant in the table first to ensure uniqueness
1637 std::vector<Constant*> ArgVec(1, Val);
1638 ArgVec.push_back(Elt);
1639 ArgVec.push_back(Idx);
1640 const ExprMapKeyType Key(Instruction::InsertElement,ArgVec);
1642 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1644 // Implicitly locked.
1645 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1648 Constant *ConstantExpr::getInsertElement(Constant *Val, Constant *Elt,
1650 assert(isa<VectorType>(Val->getType()) &&
1651 "Tried to create insertelement operation on non-vector type!");
1652 assert(Elt->getType() == cast<VectorType>(Val->getType())->getElementType()
1653 && "Insertelement types must match!");
1654 assert(Idx->getType() == Type::getInt32Ty(Val->getContext()) &&
1655 "Insertelement index must be i32 type!");
1656 return getInsertElementTy(Val->getType(), Val, Elt, Idx);
1659 Constant *ConstantExpr::getShuffleVectorTy(const Type *ReqTy, Constant *V1,
1660 Constant *V2, Constant *Mask) {
1661 if (Constant *FC = ConstantFoldShuffleVectorInstruction(
1662 ReqTy->getContext(), V1, V2, Mask))
1663 return FC; // Fold a few common cases...
1664 // Look up the constant in the table first to ensure uniqueness
1665 std::vector<Constant*> ArgVec(1, V1);
1666 ArgVec.push_back(V2);
1667 ArgVec.push_back(Mask);
1668 const ExprMapKeyType Key(Instruction::ShuffleVector,ArgVec);
1670 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1672 // Implicitly locked.
1673 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1676 Constant *ConstantExpr::getShuffleVector(Constant *V1, Constant *V2,
1678 assert(ShuffleVectorInst::isValidOperands(V1, V2, Mask) &&
1679 "Invalid shuffle vector constant expr operands!");
1681 unsigned NElts = cast<VectorType>(Mask->getType())->getNumElements();
1682 const Type *EltTy = cast<VectorType>(V1->getType())->getElementType();
1683 const Type *ShufTy = VectorType::get(EltTy, NElts);
1684 return getShuffleVectorTy(ShufTy, V1, V2, Mask);
1687 Constant *ConstantExpr::getInsertValueTy(const Type *ReqTy, Constant *Agg,
1689 const unsigned *Idxs, unsigned NumIdx) {
1690 assert(ExtractValueInst::getIndexedType(Agg->getType(), Idxs,
1691 Idxs+NumIdx) == Val->getType() &&
1692 "insertvalue indices invalid!");
1693 assert(Agg->getType() == ReqTy &&
1694 "insertvalue type invalid!");
1695 assert(Agg->getType()->isFirstClassType() &&
1696 "Non-first-class type for constant InsertValue expression");
1697 Constant *FC = ConstantFoldInsertValueInstruction(
1698 ReqTy->getContext(), Agg, Val, Idxs, NumIdx);
1699 assert(FC && "InsertValue constant expr couldn't be folded!");
1703 Constant *ConstantExpr::getInsertValue(Constant *Agg, Constant *Val,
1704 const unsigned *IdxList, unsigned NumIdx) {
1705 assert(Agg->getType()->isFirstClassType() &&
1706 "Tried to create insertelement operation on non-first-class type!");
1708 const Type *ReqTy = Agg->getType();
1711 ExtractValueInst::getIndexedType(Agg->getType(), IdxList, IdxList+NumIdx);
1713 assert(ValTy == Val->getType() && "insertvalue indices invalid!");
1714 return getInsertValueTy(ReqTy, Agg, Val, IdxList, NumIdx);
1717 Constant *ConstantExpr::getExtractValueTy(const Type *ReqTy, Constant *Agg,
1718 const unsigned *Idxs, unsigned NumIdx) {
1719 assert(ExtractValueInst::getIndexedType(Agg->getType(), Idxs,
1720 Idxs+NumIdx) == ReqTy &&
1721 "extractvalue indices invalid!");
1722 assert(Agg->getType()->isFirstClassType() &&
1723 "Non-first-class type for constant extractvalue expression");
1724 Constant *FC = ConstantFoldExtractValueInstruction(
1725 ReqTy->getContext(), Agg, Idxs, NumIdx);
1726 assert(FC && "ExtractValue constant expr couldn't be folded!");
1730 Constant *ConstantExpr::getExtractValue(Constant *Agg,
1731 const unsigned *IdxList, unsigned NumIdx) {
1732 assert(Agg->getType()->isFirstClassType() &&
1733 "Tried to create extractelement operation on non-first-class type!");
1736 ExtractValueInst::getIndexedType(Agg->getType(), IdxList, IdxList+NumIdx);
1737 assert(ReqTy && "extractvalue indices invalid!");
1738 return getExtractValueTy(ReqTy, Agg, IdxList, NumIdx);
1741 Constant* ConstantExpr::getNeg(Constant* C) {
1742 // API compatibility: Adjust integer opcodes to floating-point opcodes.
1743 if (C->getType()->isFPOrFPVector())
1745 assert(C->getType()->isIntOrIntVector() &&
1746 "Cannot NEG a nonintegral value!");
1747 return get(Instruction::Sub,
1748 ConstantFP::getZeroValueForNegation(C->getType()),
1752 Constant* ConstantExpr::getFNeg(Constant* C) {
1753 assert(C->getType()->isFPOrFPVector() &&
1754 "Cannot FNEG a non-floating-point value!");
1755 return get(Instruction::FSub,
1756 ConstantFP::getZeroValueForNegation(C->getType()),
1760 Constant* ConstantExpr::getNot(Constant* C) {
1761 assert(C->getType()->isIntOrIntVector() &&
1762 "Cannot NOT a nonintegral value!");
1763 return get(Instruction::Xor, C, Constant::getAllOnesValue(C->getType()));
1766 Constant* ConstantExpr::getAdd(Constant* C1, Constant* C2) {
1767 return get(Instruction::Add, C1, C2);
1770 Constant* ConstantExpr::getFAdd(Constant* C1, Constant* C2) {
1771 return get(Instruction::FAdd, C1, C2);
1774 Constant* ConstantExpr::getSub(Constant* C1, Constant* C2) {
1775 return get(Instruction::Sub, C1, C2);
1778 Constant* ConstantExpr::getFSub(Constant* C1, Constant* C2) {
1779 return get(Instruction::FSub, C1, C2);
1782 Constant* ConstantExpr::getMul(Constant* C1, Constant* C2) {
1783 return get(Instruction::Mul, C1, C2);
1786 Constant* ConstantExpr::getFMul(Constant* C1, Constant* C2) {
1787 return get(Instruction::FMul, C1, C2);
1790 Constant* ConstantExpr::getUDiv(Constant* C1, Constant* C2) {
1791 return get(Instruction::UDiv, C1, C2);
1794 Constant* ConstantExpr::getSDiv(Constant* C1, Constant* C2) {
1795 return get(Instruction::SDiv, C1, C2);
1798 Constant* ConstantExpr::getFDiv(Constant* C1, Constant* C2) {
1799 return get(Instruction::FDiv, C1, C2);
1802 Constant* ConstantExpr::getURem(Constant* C1, Constant* C2) {
1803 return get(Instruction::URem, C1, C2);
1806 Constant* ConstantExpr::getSRem(Constant* C1, Constant* C2) {
1807 return get(Instruction::SRem, C1, C2);
1810 Constant* ConstantExpr::getFRem(Constant* C1, Constant* C2) {
1811 return get(Instruction::FRem, C1, C2);
1814 Constant* ConstantExpr::getAnd(Constant* C1, Constant* C2) {
1815 return get(Instruction::And, C1, C2);
1818 Constant* ConstantExpr::getOr(Constant* C1, Constant* C2) {
1819 return get(Instruction::Or, C1, C2);
1822 Constant* ConstantExpr::getXor(Constant* C1, Constant* C2) {
1823 return get(Instruction::Xor, C1, C2);
1826 Constant* ConstantExpr::getShl(Constant* C1, Constant* C2) {
1827 return get(Instruction::Shl, C1, C2);
1830 Constant* ConstantExpr::getLShr(Constant* C1, Constant* C2) {
1831 return get(Instruction::LShr, C1, C2);
1834 Constant* ConstantExpr::getAShr(Constant* C1, Constant* C2) {
1835 return get(Instruction::AShr, C1, C2);
1838 // destroyConstant - Remove the constant from the constant table...
1840 void ConstantExpr::destroyConstant() {
1841 // Implicitly locked.
1842 LLVMContextImpl *pImpl = getType()->getContext().pImpl;
1843 pImpl->ExprConstants.remove(this);
1844 destroyConstantImpl();
1847 const char *ConstantExpr::getOpcodeName() const {
1848 return Instruction::getOpcodeName(getOpcode());
1851 //===----------------------------------------------------------------------===//
1852 // replaceUsesOfWithOnConstant implementations
1854 /// replaceUsesOfWithOnConstant - Update this constant array to change uses of
1855 /// 'From' to be uses of 'To'. This must update the uniquing data structures
1858 /// Note that we intentionally replace all uses of From with To here. Consider
1859 /// a large array that uses 'From' 1000 times. By handling this case all here,
1860 /// ConstantArray::replaceUsesOfWithOnConstant is only invoked once, and that
1861 /// single invocation handles all 1000 uses. Handling them one at a time would
1862 /// work, but would be really slow because it would have to unique each updated
1865 void ConstantArray::replaceUsesOfWithOnConstant(Value *From, Value *To,
1867 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
1868 Constant *ToC = cast<Constant>(To);
1870 LLVMContext &Context = getType()->getContext();
1871 LLVMContextImpl *pImpl = Context.pImpl;
1873 std::pair<LLVMContextImpl::ArrayConstantsTy::MapKey, ConstantArray*> Lookup;
1874 Lookup.first.first = getType();
1875 Lookup.second = this;
1877 std::vector<Constant*> &Values = Lookup.first.second;
1878 Values.reserve(getNumOperands()); // Build replacement array.
1880 // Fill values with the modified operands of the constant array. Also,
1881 // compute whether this turns into an all-zeros array.
1882 bool isAllZeros = false;
1883 unsigned NumUpdated = 0;
1884 if (!ToC->isNullValue()) {
1885 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
1886 Constant *Val = cast<Constant>(O->get());
1891 Values.push_back(Val);
1895 for (Use *O = OperandList, *E = OperandList+getNumOperands();O != E; ++O) {
1896 Constant *Val = cast<Constant>(O->get());
1901 Values.push_back(Val);
1902 if (isAllZeros) isAllZeros = Val->isNullValue();
1906 Constant *Replacement = 0;
1908 Replacement = ConstantAggregateZero::get(getType());
1910 // Check to see if we have this array type already.
1911 sys::SmartScopedWriter<true> Writer(pImpl->ConstantsLock);
1913 LLVMContextImpl::ArrayConstantsTy::MapTy::iterator I =
1914 pImpl->ArrayConstants.InsertOrGetItem(Lookup, Exists);
1917 Replacement = I->second;
1919 // Okay, the new shape doesn't exist in the system yet. Instead of
1920 // creating a new constant array, inserting it, replaceallusesof'ing the
1921 // old with the new, then deleting the old... just update the current one
1923 pImpl->ArrayConstants.MoveConstantToNewSlot(this, I);
1925 // Update to the new value. Optimize for the case when we have a single
1926 // operand that we're changing, but handle bulk updates efficiently.
1927 if (NumUpdated == 1) {
1928 unsigned OperandToUpdate = U - OperandList;
1929 assert(getOperand(OperandToUpdate) == From &&
1930 "ReplaceAllUsesWith broken!");
1931 setOperand(OperandToUpdate, ToC);
1933 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
1934 if (getOperand(i) == From)
1941 // Otherwise, I do need to replace this with an existing value.
1942 assert(Replacement != this && "I didn't contain From!");
1944 // Everyone using this now uses the replacement.
1945 uncheckedReplaceAllUsesWith(Replacement);
1947 // Delete the old constant!
1951 void ConstantStruct::replaceUsesOfWithOnConstant(Value *From, Value *To,
1953 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
1954 Constant *ToC = cast<Constant>(To);
1956 unsigned OperandToUpdate = U-OperandList;
1957 assert(getOperand(OperandToUpdate) == From && "ReplaceAllUsesWith broken!");
1959 std::pair<LLVMContextImpl::StructConstantsTy::MapKey, ConstantStruct*> Lookup;
1960 Lookup.first.first = getType();
1961 Lookup.second = this;
1962 std::vector<Constant*> &Values = Lookup.first.second;
1963 Values.reserve(getNumOperands()); // Build replacement struct.
1966 // Fill values with the modified operands of the constant struct. Also,
1967 // compute whether this turns into an all-zeros struct.
1968 bool isAllZeros = false;
1969 if (!ToC->isNullValue()) {
1970 for (Use *O = OperandList, *E = OperandList + getNumOperands(); O != E; ++O)
1971 Values.push_back(cast<Constant>(O->get()));
1974 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
1975 Constant *Val = cast<Constant>(O->get());
1976 Values.push_back(Val);
1977 if (isAllZeros) isAllZeros = Val->isNullValue();
1980 Values[OperandToUpdate] = ToC;
1982 LLVMContext &Context = getType()->getContext();
1983 LLVMContextImpl *pImpl = Context.pImpl;
1985 Constant *Replacement = 0;
1987 Replacement = ConstantAggregateZero::get(getType());
1989 // Check to see if we have this array type already.
1990 sys::SmartScopedWriter<true> Writer(pImpl->ConstantsLock);
1992 LLVMContextImpl::StructConstantsTy::MapTy::iterator I =
1993 pImpl->StructConstants.InsertOrGetItem(Lookup, Exists);
1996 Replacement = I->second;
1998 // Okay, the new shape doesn't exist in the system yet. Instead of
1999 // creating a new constant struct, inserting it, replaceallusesof'ing the
2000 // old with the new, then deleting the old... just update the current one
2002 pImpl->StructConstants.MoveConstantToNewSlot(this, I);
2004 // Update to the new value.
2005 setOperand(OperandToUpdate, ToC);
2010 assert(Replacement != this && "I didn't contain From!");
2012 // Everyone using this now uses the replacement.
2013 uncheckedReplaceAllUsesWith(Replacement);
2015 // Delete the old constant!
2019 void ConstantVector::replaceUsesOfWithOnConstant(Value *From, Value *To,
2021 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2023 std::vector<Constant*> Values;
2024 Values.reserve(getNumOperands()); // Build replacement array...
2025 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
2026 Constant *Val = getOperand(i);
2027 if (Val == From) Val = cast<Constant>(To);
2028 Values.push_back(Val);
2031 Constant *Replacement = get(getType(), Values);
2032 assert(Replacement != this && "I didn't contain From!");
2034 // Everyone using this now uses the replacement.
2035 uncheckedReplaceAllUsesWith(Replacement);
2037 // Delete the old constant!
2041 void ConstantExpr::replaceUsesOfWithOnConstant(Value *From, Value *ToV,
2043 assert(isa<Constant>(ToV) && "Cannot make Constant refer to non-constant!");
2044 Constant *To = cast<Constant>(ToV);
2046 Constant *Replacement = 0;
2047 if (getOpcode() == Instruction::GetElementPtr) {
2048 SmallVector<Constant*, 8> Indices;
2049 Constant *Pointer = getOperand(0);
2050 Indices.reserve(getNumOperands()-1);
2051 if (Pointer == From) Pointer = To;
2053 for (unsigned i = 1, e = getNumOperands(); i != e; ++i) {
2054 Constant *Val = getOperand(i);
2055 if (Val == From) Val = To;
2056 Indices.push_back(Val);
2058 Replacement = ConstantExpr::getGetElementPtr(Pointer,
2059 &Indices[0], Indices.size());
2060 } else if (getOpcode() == Instruction::ExtractValue) {
2061 Constant *Agg = getOperand(0);
2062 if (Agg == From) Agg = To;
2064 const SmallVector<unsigned, 4> &Indices = getIndices();
2065 Replacement = ConstantExpr::getExtractValue(Agg,
2066 &Indices[0], Indices.size());
2067 } else if (getOpcode() == Instruction::InsertValue) {
2068 Constant *Agg = getOperand(0);
2069 Constant *Val = getOperand(1);
2070 if (Agg == From) Agg = To;
2071 if (Val == From) Val = To;
2073 const SmallVector<unsigned, 4> &Indices = getIndices();
2074 Replacement = ConstantExpr::getInsertValue(Agg, Val,
2075 &Indices[0], Indices.size());
2076 } else if (isCast()) {
2077 assert(getOperand(0) == From && "Cast only has one use!");
2078 Replacement = ConstantExpr::getCast(getOpcode(), To, getType());
2079 } else if (getOpcode() == Instruction::Select) {
2080 Constant *C1 = getOperand(0);
2081 Constant *C2 = getOperand(1);
2082 Constant *C3 = getOperand(2);
2083 if (C1 == From) C1 = To;
2084 if (C2 == From) C2 = To;
2085 if (C3 == From) C3 = To;
2086 Replacement = ConstantExpr::getSelect(C1, C2, C3);
2087 } else if (getOpcode() == Instruction::ExtractElement) {
2088 Constant *C1 = getOperand(0);
2089 Constant *C2 = getOperand(1);
2090 if (C1 == From) C1 = To;
2091 if (C2 == From) C2 = To;
2092 Replacement = ConstantExpr::getExtractElement(C1, C2);
2093 } else if (getOpcode() == Instruction::InsertElement) {
2094 Constant *C1 = getOperand(0);
2095 Constant *C2 = getOperand(1);
2096 Constant *C3 = getOperand(1);
2097 if (C1 == From) C1 = To;
2098 if (C2 == From) C2 = To;
2099 if (C3 == From) C3 = To;
2100 Replacement = ConstantExpr::getInsertElement(C1, C2, C3);
2101 } else if (getOpcode() == Instruction::ShuffleVector) {
2102 Constant *C1 = getOperand(0);
2103 Constant *C2 = getOperand(1);
2104 Constant *C3 = getOperand(2);
2105 if (C1 == From) C1 = To;
2106 if (C2 == From) C2 = To;
2107 if (C3 == From) C3 = To;
2108 Replacement = ConstantExpr::getShuffleVector(C1, C2, C3);
2109 } else if (isCompare()) {
2110 Constant *C1 = getOperand(0);
2111 Constant *C2 = getOperand(1);
2112 if (C1 == From) C1 = To;
2113 if (C2 == From) C2 = To;
2114 if (getOpcode() == Instruction::ICmp)
2115 Replacement = ConstantExpr::getICmp(getPredicate(), C1, C2);
2117 assert(getOpcode() == Instruction::FCmp);
2118 Replacement = ConstantExpr::getFCmp(getPredicate(), C1, C2);
2120 } else if (getNumOperands() == 2) {
2121 Constant *C1 = getOperand(0);
2122 Constant *C2 = getOperand(1);
2123 if (C1 == From) C1 = To;
2124 if (C2 == From) C2 = To;
2125 Replacement = ConstantExpr::get(getOpcode(), C1, C2, SubclassData);
2127 llvm_unreachable("Unknown ConstantExpr type!");
2131 assert(Replacement != this && "I didn't contain From!");
2133 // Everyone using this now uses the replacement.
2134 uncheckedReplaceAllUsesWith(Replacement);
2136 // Delete the old constant!