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) {
330 if (Ty == Type::getFloatTy(Ty->getContext()))
331 return &APFloat::IEEEsingle;
332 if (Ty == Type::getDoubleTy(Ty->getContext()))
333 return &APFloat::IEEEdouble;
334 if (Ty == Type::getX86_FP80Ty(Ty->getContext()))
335 return &APFloat::x87DoubleExtended;
336 else if (Ty == Type::getFP128Ty(Ty->getContext()))
337 return &APFloat::IEEEquad;
339 assert(Ty == Type::getPPC_FP128Ty(Ty->getContext()) && "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() ||
477 C->getType()->getTypeID() == T->getElementType()->getTypeID())) &&
478 "Initializer for array element doesn't match array element type!");
483 Constant *ConstantArray::get(const ArrayType *Ty,
484 const std::vector<Constant*> &V) {
485 for (unsigned i = 0, e = V.size(); i != e; ++i) {
486 assert(V[i]->getType() == Ty->getElementType() &&
487 "Wrong type in array element initializer");
489 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
490 // If this is an all-zero array, return a ConstantAggregateZero object
493 if (!C->isNullValue()) {
494 // Implicitly locked.
495 return pImpl->ArrayConstants.getOrCreate(Ty, V);
497 for (unsigned i = 1, e = V.size(); i != e; ++i)
499 // Implicitly locked.
500 return pImpl->ArrayConstants.getOrCreate(Ty, V);
504 return ConstantAggregateZero::get(Ty);
508 Constant* ConstantArray::get(const ArrayType* T, Constant* const* Vals,
510 // FIXME: make this the primary ctor method.
511 return get(T, std::vector<Constant*>(Vals, Vals+NumVals));
514 /// ConstantArray::get(const string&) - Return an array that is initialized to
515 /// contain the specified string. If length is zero then a null terminator is
516 /// added to the specified string so that it may be used in a natural way.
517 /// Otherwise, the length parameter specifies how much of the string to use
518 /// and it won't be null terminated.
520 Constant* ConstantArray::get(LLVMContext &Context, const StringRef &Str,
522 std::vector<Constant*> ElementVals;
523 for (unsigned i = 0; i < Str.size(); ++i)
524 ElementVals.push_back(ConstantInt::get(Type::getInt8Ty(Context), Str[i]));
526 // Add a null terminator to the string...
528 ElementVals.push_back(ConstantInt::get(Type::getInt8Ty(Context), 0));
531 ArrayType *ATy = ArrayType::get(Type::getInt8Ty(Context), ElementVals.size());
532 return get(ATy, ElementVals);
537 ConstantStruct::ConstantStruct(const StructType *T,
538 const std::vector<Constant*> &V)
539 : Constant(T, ConstantStructVal,
540 OperandTraits<ConstantStruct>::op_end(this) - V.size(),
542 assert(V.size() == T->getNumElements() &&
543 "Invalid initializer vector for constant structure");
544 Use *OL = OperandList;
545 for (std::vector<Constant*>::const_iterator I = V.begin(), E = V.end();
548 assert((C->getType() == T->getElementType(I-V.begin()) ||
549 ((T->getElementType(I-V.begin())->isAbstract() ||
550 C->getType()->isAbstract()) &&
551 T->getElementType(I-V.begin())->getTypeID() ==
552 C->getType()->getTypeID())) &&
553 "Initializer for struct element doesn't match struct element type!");
558 // ConstantStruct accessors.
559 Constant* ConstantStruct::get(const StructType* T,
560 const std::vector<Constant*>& V) {
561 LLVMContextImpl* pImpl = T->getContext().pImpl;
563 // Create a ConstantAggregateZero value if all elements are zeros...
564 for (unsigned i = 0, e = V.size(); i != e; ++i)
565 if (!V[i]->isNullValue())
566 // Implicitly locked.
567 return pImpl->StructConstants.getOrCreate(T, V);
569 return ConstantAggregateZero::get(T);
572 Constant* ConstantStruct::get(LLVMContext &Context,
573 const std::vector<Constant*>& V, bool packed) {
574 std::vector<const Type*> StructEls;
575 StructEls.reserve(V.size());
576 for (unsigned i = 0, e = V.size(); i != e; ++i)
577 StructEls.push_back(V[i]->getType());
578 return get(StructType::get(Context, StructEls, packed), V);
581 Constant* ConstantStruct::get(LLVMContext &Context,
582 Constant* const *Vals, unsigned NumVals,
584 // FIXME: make this the primary ctor method.
585 return get(Context, std::vector<Constant*>(Vals, Vals+NumVals), Packed);
588 ConstantVector::ConstantVector(const VectorType *T,
589 const std::vector<Constant*> &V)
590 : Constant(T, ConstantVectorVal,
591 OperandTraits<ConstantVector>::op_end(this) - V.size(),
593 Use *OL = OperandList;
594 for (std::vector<Constant*>::const_iterator I = V.begin(), E = V.end();
597 assert((C->getType() == T->getElementType() ||
599 C->getType()->getTypeID() == T->getElementType()->getTypeID())) &&
600 "Initializer for vector element doesn't match vector element type!");
605 // ConstantVector accessors.
606 Constant* ConstantVector::get(const VectorType* T,
607 const std::vector<Constant*>& V) {
608 assert(!V.empty() && "Vectors can't be empty");
609 LLVMContext &Context = T->getContext();
610 LLVMContextImpl *pImpl = Context.pImpl;
612 // If this is an all-undef or alll-zero vector, return a
613 // ConstantAggregateZero or UndefValue.
615 bool isZero = C->isNullValue();
616 bool isUndef = isa<UndefValue>(C);
618 if (isZero || isUndef) {
619 for (unsigned i = 1, e = V.size(); i != e; ++i)
621 isZero = isUndef = false;
627 return ConstantAggregateZero::get(T);
629 return UndefValue::get(T);
631 // Implicitly locked.
632 return pImpl->VectorConstants.getOrCreate(T, V);
635 Constant* ConstantVector::get(const std::vector<Constant*>& V) {
636 assert(!V.empty() && "Cannot infer type if V is empty");
637 return get(VectorType::get(V.front()->getType(),V.size()), V);
640 Constant* ConstantVector::get(Constant* const* Vals, unsigned NumVals) {
641 // FIXME: make this the primary ctor method.
642 return get(std::vector<Constant*>(Vals, Vals+NumVals));
645 Constant* ConstantExpr::getNSWAdd(Constant* C1, Constant* C2) {
646 return getTy(C1->getType(), Instruction::Add, C1, C2,
647 OverflowingBinaryOperator::NoSignedWrap);
650 Constant* ConstantExpr::getNSWSub(Constant* C1, Constant* C2) {
651 return getTy(C1->getType(), Instruction::Sub, C1, C2,
652 OverflowingBinaryOperator::NoSignedWrap);
655 Constant* ConstantExpr::getExactSDiv(Constant* C1, Constant* C2) {
656 return getTy(C1->getType(), Instruction::SDiv, C1, C2,
657 SDivOperator::IsExact);
660 // Utility function for determining if a ConstantExpr is a CastOp or not. This
661 // can't be inline because we don't want to #include Instruction.h into
663 bool ConstantExpr::isCast() const {
664 return Instruction::isCast(getOpcode());
667 bool ConstantExpr::isCompare() const {
668 return getOpcode() == Instruction::ICmp || getOpcode() == Instruction::FCmp;
671 bool ConstantExpr::isGEPWithNoNotionalOverIndexing() const {
672 if (getOpcode() != Instruction::GetElementPtr) return false;
674 gep_type_iterator GEPI = gep_type_begin(this), E = gep_type_end(this);
675 User::const_op_iterator OI = next(this->op_begin());
677 // Skip the first index, as it has no static limit.
681 // The remaining indices must be compile-time known integers within the
682 // bounds of the corresponding notional static array types.
683 for (; GEPI != E; ++GEPI, ++OI) {
684 ConstantInt *CI = dyn_cast<ConstantInt>(*OI);
685 if (!CI) return false;
686 if (const ArrayType *ATy = dyn_cast<ArrayType>(*GEPI))
687 if (CI->getValue().getActiveBits() > 64 ||
688 CI->getZExtValue() >= ATy->getNumElements())
692 // All the indices checked out.
696 bool ConstantExpr::hasIndices() const {
697 return getOpcode() == Instruction::ExtractValue ||
698 getOpcode() == Instruction::InsertValue;
701 const SmallVector<unsigned, 4> &ConstantExpr::getIndices() const {
702 if (const ExtractValueConstantExpr *EVCE =
703 dyn_cast<ExtractValueConstantExpr>(this))
704 return EVCE->Indices;
706 return cast<InsertValueConstantExpr>(this)->Indices;
709 unsigned ConstantExpr::getPredicate() const {
710 assert(getOpcode() == Instruction::FCmp ||
711 getOpcode() == Instruction::ICmp);
712 return ((const CompareConstantExpr*)this)->predicate;
715 /// getWithOperandReplaced - Return a constant expression identical to this
716 /// one, but with the specified operand set to the specified value.
718 ConstantExpr::getWithOperandReplaced(unsigned OpNo, Constant *Op) const {
719 assert(OpNo < getNumOperands() && "Operand num is out of range!");
720 assert(Op->getType() == getOperand(OpNo)->getType() &&
721 "Replacing operand with value of different type!");
722 if (getOperand(OpNo) == Op)
723 return const_cast<ConstantExpr*>(this);
725 Constant *Op0, *Op1, *Op2;
726 switch (getOpcode()) {
727 case Instruction::Trunc:
728 case Instruction::ZExt:
729 case Instruction::SExt:
730 case Instruction::FPTrunc:
731 case Instruction::FPExt:
732 case Instruction::UIToFP:
733 case Instruction::SIToFP:
734 case Instruction::FPToUI:
735 case Instruction::FPToSI:
736 case Instruction::PtrToInt:
737 case Instruction::IntToPtr:
738 case Instruction::BitCast:
739 return ConstantExpr::getCast(getOpcode(), Op, getType());
740 case Instruction::Select:
741 Op0 = (OpNo == 0) ? Op : getOperand(0);
742 Op1 = (OpNo == 1) ? Op : getOperand(1);
743 Op2 = (OpNo == 2) ? Op : getOperand(2);
744 return ConstantExpr::getSelect(Op0, Op1, Op2);
745 case Instruction::InsertElement:
746 Op0 = (OpNo == 0) ? Op : getOperand(0);
747 Op1 = (OpNo == 1) ? Op : getOperand(1);
748 Op2 = (OpNo == 2) ? Op : getOperand(2);
749 return ConstantExpr::getInsertElement(Op0, Op1, Op2);
750 case Instruction::ExtractElement:
751 Op0 = (OpNo == 0) ? Op : getOperand(0);
752 Op1 = (OpNo == 1) ? Op : getOperand(1);
753 return ConstantExpr::getExtractElement(Op0, Op1);
754 case Instruction::ShuffleVector:
755 Op0 = (OpNo == 0) ? Op : getOperand(0);
756 Op1 = (OpNo == 1) ? Op : getOperand(1);
757 Op2 = (OpNo == 2) ? Op : getOperand(2);
758 return ConstantExpr::getShuffleVector(Op0, Op1, Op2);
759 case Instruction::GetElementPtr: {
760 SmallVector<Constant*, 8> Ops;
761 Ops.resize(getNumOperands()-1);
762 for (unsigned i = 1, e = getNumOperands(); i != e; ++i)
763 Ops[i-1] = getOperand(i);
765 return cast<GEPOperator>(this)->isInBounds() ?
766 ConstantExpr::getInBoundsGetElementPtr(Op, &Ops[0], Ops.size()) :
767 ConstantExpr::getGetElementPtr(Op, &Ops[0], Ops.size());
769 return cast<GEPOperator>(this)->isInBounds() ?
770 ConstantExpr::getInBoundsGetElementPtr(getOperand(0), &Ops[0], Ops.size()) :
771 ConstantExpr::getGetElementPtr(getOperand(0), &Ops[0], Ops.size());
774 assert(getNumOperands() == 2 && "Must be binary operator?");
775 Op0 = (OpNo == 0) ? Op : getOperand(0);
776 Op1 = (OpNo == 1) ? Op : getOperand(1);
777 return ConstantExpr::get(getOpcode(), Op0, Op1, SubclassData);
781 /// getWithOperands - This returns the current constant expression with the
782 /// operands replaced with the specified values. The specified operands must
783 /// match count and type with the existing ones.
784 Constant *ConstantExpr::
785 getWithOperands(Constant* const *Ops, unsigned NumOps) const {
786 assert(NumOps == getNumOperands() && "Operand count mismatch!");
787 bool AnyChange = false;
788 for (unsigned i = 0; i != NumOps; ++i) {
789 assert(Ops[i]->getType() == getOperand(i)->getType() &&
790 "Operand type mismatch!");
791 AnyChange |= Ops[i] != getOperand(i);
793 if (!AnyChange) // No operands changed, return self.
794 return const_cast<ConstantExpr*>(this);
796 switch (getOpcode()) {
797 case Instruction::Trunc:
798 case Instruction::ZExt:
799 case Instruction::SExt:
800 case Instruction::FPTrunc:
801 case Instruction::FPExt:
802 case Instruction::UIToFP:
803 case Instruction::SIToFP:
804 case Instruction::FPToUI:
805 case Instruction::FPToSI:
806 case Instruction::PtrToInt:
807 case Instruction::IntToPtr:
808 case Instruction::BitCast:
809 return ConstantExpr::getCast(getOpcode(), Ops[0], getType());
810 case Instruction::Select:
811 return ConstantExpr::getSelect(Ops[0], Ops[1], Ops[2]);
812 case Instruction::InsertElement:
813 return ConstantExpr::getInsertElement(Ops[0], Ops[1], Ops[2]);
814 case Instruction::ExtractElement:
815 return ConstantExpr::getExtractElement(Ops[0], Ops[1]);
816 case Instruction::ShuffleVector:
817 return ConstantExpr::getShuffleVector(Ops[0], Ops[1], Ops[2]);
818 case Instruction::GetElementPtr:
819 return cast<GEPOperator>(this)->isInBounds() ?
820 ConstantExpr::getInBoundsGetElementPtr(Ops[0], &Ops[1], NumOps-1) :
821 ConstantExpr::getGetElementPtr(Ops[0], &Ops[1], NumOps-1);
822 case Instruction::ICmp:
823 case Instruction::FCmp:
824 return ConstantExpr::getCompare(getPredicate(), Ops[0], Ops[1]);
826 assert(getNumOperands() == 2 && "Must be binary operator?");
827 return ConstantExpr::get(getOpcode(), Ops[0], Ops[1], SubclassData);
832 //===----------------------------------------------------------------------===//
833 // isValueValidForType implementations
835 bool ConstantInt::isValueValidForType(const Type *Ty, uint64_t Val) {
836 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth(); // assert okay
837 if (Ty == Type::getInt1Ty(Ty->getContext()))
838 return Val == 0 || Val == 1;
840 return true; // always true, has to fit in largest type
841 uint64_t Max = (1ll << NumBits) - 1;
845 bool ConstantInt::isValueValidForType(const Type *Ty, int64_t Val) {
846 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth(); // assert okay
847 if (Ty == Type::getInt1Ty(Ty->getContext()))
848 return Val == 0 || Val == 1 || Val == -1;
850 return true; // always true, has to fit in largest type
851 int64_t Min = -(1ll << (NumBits-1));
852 int64_t Max = (1ll << (NumBits-1)) - 1;
853 return (Val >= Min && Val <= Max);
856 bool ConstantFP::isValueValidForType(const Type *Ty, const APFloat& Val) {
857 // convert modifies in place, so make a copy.
858 APFloat Val2 = APFloat(Val);
860 switch (Ty->getTypeID()) {
862 return false; // These can't be represented as floating point!
864 // FIXME rounding mode needs to be more flexible
865 case Type::FloatTyID: {
866 if (&Val2.getSemantics() == &APFloat::IEEEsingle)
868 Val2.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, &losesInfo);
871 case Type::DoubleTyID: {
872 if (&Val2.getSemantics() == &APFloat::IEEEsingle ||
873 &Val2.getSemantics() == &APFloat::IEEEdouble)
875 Val2.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &losesInfo);
878 case Type::X86_FP80TyID:
879 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
880 &Val2.getSemantics() == &APFloat::IEEEdouble ||
881 &Val2.getSemantics() == &APFloat::x87DoubleExtended;
882 case Type::FP128TyID:
883 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
884 &Val2.getSemantics() == &APFloat::IEEEdouble ||
885 &Val2.getSemantics() == &APFloat::IEEEquad;
886 case Type::PPC_FP128TyID:
887 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
888 &Val2.getSemantics() == &APFloat::IEEEdouble ||
889 &Val2.getSemantics() == &APFloat::PPCDoubleDouble;
893 //===----------------------------------------------------------------------===//
894 // Factory Function Implementation
896 ConstantAggregateZero* ConstantAggregateZero::get(const Type* Ty) {
897 assert((isa<StructType>(Ty) || isa<ArrayType>(Ty) || isa<VectorType>(Ty)) &&
898 "Cannot create an aggregate zero of non-aggregate type!");
900 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
901 // Implicitly locked.
902 return pImpl->AggZeroConstants.getOrCreate(Ty, 0);
905 /// destroyConstant - Remove the constant from the constant table...
907 void ConstantAggregateZero::destroyConstant() {
908 // Implicitly locked.
909 getType()->getContext().pImpl->AggZeroConstants.remove(this);
910 destroyConstantImpl();
913 /// destroyConstant - Remove the constant from the constant table...
915 void ConstantArray::destroyConstant() {
916 // Implicitly locked.
917 getType()->getContext().pImpl->ArrayConstants.remove(this);
918 destroyConstantImpl();
921 /// isString - This method returns true if the array is an array of i8, and
922 /// if the elements of the array are all ConstantInt's.
923 bool ConstantArray::isString() const {
924 // Check the element type for i8...
925 if (getType()->getElementType() != Type::getInt8Ty(getContext()))
927 // Check the elements to make sure they are all integers, not constant
929 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
930 if (!isa<ConstantInt>(getOperand(i)))
935 /// isCString - This method returns true if the array is a string (see
936 /// isString) and it ends in a null byte \\0 and does not contains any other
937 /// null bytes except its terminator.
938 bool ConstantArray::isCString() const {
939 // Check the element type for i8...
940 if (getType()->getElementType() != Type::getInt8Ty(getContext()))
943 // Last element must be a null.
944 if (!getOperand(getNumOperands()-1)->isNullValue())
946 // Other elements must be non-null integers.
947 for (unsigned i = 0, e = getNumOperands()-1; i != e; ++i) {
948 if (!isa<ConstantInt>(getOperand(i)))
950 if (getOperand(i)->isNullValue())
957 /// getAsString - If the sub-element type of this array is i8
958 /// then this method converts the array to an std::string and returns it.
959 /// Otherwise, it asserts out.
961 std::string ConstantArray::getAsString() const {
962 assert(isString() && "Not a string!");
964 Result.reserve(getNumOperands());
965 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
966 Result.push_back((char)cast<ConstantInt>(getOperand(i))->getZExtValue());
971 //---- ConstantStruct::get() implementation...
978 // destroyConstant - Remove the constant from the constant table...
980 void ConstantStruct::destroyConstant() {
981 // Implicitly locked.
982 getType()->getContext().pImpl->StructConstants.remove(this);
983 destroyConstantImpl();
986 // destroyConstant - Remove the constant from the constant table...
988 void ConstantVector::destroyConstant() {
989 // Implicitly locked.
990 getType()->getContext().pImpl->VectorConstants.remove(this);
991 destroyConstantImpl();
994 /// This function will return true iff every element in this vector constant
995 /// is set to all ones.
996 /// @returns true iff this constant's emements are all set to all ones.
997 /// @brief Determine if the value is all ones.
998 bool ConstantVector::isAllOnesValue() const {
999 // Check out first element.
1000 const Constant *Elt = getOperand(0);
1001 const ConstantInt *CI = dyn_cast<ConstantInt>(Elt);
1002 if (!CI || !CI->isAllOnesValue()) return false;
1003 // Then make sure all remaining elements point to the same value.
1004 for (unsigned I = 1, E = getNumOperands(); I < E; ++I) {
1005 if (getOperand(I) != Elt) return false;
1010 /// getSplatValue - If this is a splat constant, where all of the
1011 /// elements have the same value, return that value. Otherwise return null.
1012 Constant *ConstantVector::getSplatValue() {
1013 // Check out first element.
1014 Constant *Elt = getOperand(0);
1015 // Then make sure all remaining elements point to the same value.
1016 for (unsigned I = 1, E = getNumOperands(); I < E; ++I)
1017 if (getOperand(I) != Elt) return 0;
1021 //---- ConstantPointerNull::get() implementation...
1024 ConstantPointerNull *ConstantPointerNull::get(const PointerType *Ty) {
1025 // Implicitly locked.
1026 return Ty->getContext().pImpl->NullPtrConstants.getOrCreate(Ty, 0);
1029 // destroyConstant - Remove the constant from the constant table...
1031 void ConstantPointerNull::destroyConstant() {
1032 // Implicitly locked.
1033 getType()->getContext().pImpl->NullPtrConstants.remove(this);
1034 destroyConstantImpl();
1038 //---- UndefValue::get() implementation...
1041 UndefValue *UndefValue::get(const Type *Ty) {
1042 // Implicitly locked.
1043 return Ty->getContext().pImpl->UndefValueConstants.getOrCreate(Ty, 0);
1046 // destroyConstant - Remove the constant from the constant table.
1048 void UndefValue::destroyConstant() {
1049 // Implicitly locked.
1050 getType()->getContext().pImpl->UndefValueConstants.remove(this);
1051 destroyConstantImpl();
1054 //---- ConstantExpr::get() implementations...
1057 /// This is a utility function to handle folding of casts and lookup of the
1058 /// cast in the ExprConstants map. It is used by the various get* methods below.
1059 static inline Constant *getFoldedCast(
1060 Instruction::CastOps opc, Constant *C, const Type *Ty) {
1061 assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
1062 // Fold a few common cases
1063 if (Constant *FC = ConstantFoldCastInstruction(Ty->getContext(), opc, C, Ty))
1066 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
1068 // Look up the constant in the table first to ensure uniqueness
1069 std::vector<Constant*> argVec(1, C);
1070 ExprMapKeyType Key(opc, argVec);
1072 // Implicitly locked.
1073 return pImpl->ExprConstants.getOrCreate(Ty, Key);
1076 Constant *ConstantExpr::getCast(unsigned oc, Constant *C, const Type *Ty) {
1077 Instruction::CastOps opc = Instruction::CastOps(oc);
1078 assert(Instruction::isCast(opc) && "opcode out of range");
1079 assert(C && Ty && "Null arguments to getCast");
1080 assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
1084 llvm_unreachable("Invalid cast opcode");
1086 case Instruction::Trunc: return getTrunc(C, Ty);
1087 case Instruction::ZExt: return getZExt(C, Ty);
1088 case Instruction::SExt: return getSExt(C, Ty);
1089 case Instruction::FPTrunc: return getFPTrunc(C, Ty);
1090 case Instruction::FPExt: return getFPExtend(C, Ty);
1091 case Instruction::UIToFP: return getUIToFP(C, Ty);
1092 case Instruction::SIToFP: return getSIToFP(C, Ty);
1093 case Instruction::FPToUI: return getFPToUI(C, Ty);
1094 case Instruction::FPToSI: return getFPToSI(C, Ty);
1095 case Instruction::PtrToInt: return getPtrToInt(C, Ty);
1096 case Instruction::IntToPtr: return getIntToPtr(C, Ty);
1097 case Instruction::BitCast: return getBitCast(C, Ty);
1102 Constant *ConstantExpr::getZExtOrBitCast(Constant *C, const Type *Ty) {
1103 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1104 return getCast(Instruction::BitCast, C, Ty);
1105 return getCast(Instruction::ZExt, C, Ty);
1108 Constant *ConstantExpr::getSExtOrBitCast(Constant *C, const Type *Ty) {
1109 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1110 return getCast(Instruction::BitCast, C, Ty);
1111 return getCast(Instruction::SExt, C, Ty);
1114 Constant *ConstantExpr::getTruncOrBitCast(Constant *C, const Type *Ty) {
1115 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1116 return getCast(Instruction::BitCast, C, Ty);
1117 return getCast(Instruction::Trunc, C, Ty);
1120 Constant *ConstantExpr::getPointerCast(Constant *S, const Type *Ty) {
1121 assert(isa<PointerType>(S->getType()) && "Invalid cast");
1122 assert((Ty->isInteger() || isa<PointerType>(Ty)) && "Invalid cast");
1124 if (Ty->isInteger())
1125 return getCast(Instruction::PtrToInt, S, Ty);
1126 return getCast(Instruction::BitCast, S, Ty);
1129 Constant *ConstantExpr::getIntegerCast(Constant *C, const Type *Ty,
1131 assert(C->getType()->isIntOrIntVector() &&
1132 Ty->isIntOrIntVector() && "Invalid cast");
1133 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1134 unsigned DstBits = Ty->getScalarSizeInBits();
1135 Instruction::CastOps opcode =
1136 (SrcBits == DstBits ? Instruction::BitCast :
1137 (SrcBits > DstBits ? Instruction::Trunc :
1138 (isSigned ? Instruction::SExt : Instruction::ZExt)));
1139 return getCast(opcode, C, Ty);
1142 Constant *ConstantExpr::getFPCast(Constant *C, const Type *Ty) {
1143 assert(C->getType()->isFPOrFPVector() && Ty->isFPOrFPVector() &&
1145 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1146 unsigned DstBits = Ty->getScalarSizeInBits();
1147 if (SrcBits == DstBits)
1148 return C; // Avoid a useless cast
1149 Instruction::CastOps opcode =
1150 (SrcBits > DstBits ? Instruction::FPTrunc : Instruction::FPExt);
1151 return getCast(opcode, C, Ty);
1154 Constant *ConstantExpr::getTrunc(Constant *C, const Type *Ty) {
1156 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1157 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1159 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1160 assert(C->getType()->isIntOrIntVector() && "Trunc operand must be integer");
1161 assert(Ty->isIntOrIntVector() && "Trunc produces only integral");
1162 assert(C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1163 "SrcTy must be larger than DestTy for Trunc!");
1165 return getFoldedCast(Instruction::Trunc, C, Ty);
1168 Constant *ConstantExpr::getSExt(Constant *C, const Type *Ty) {
1170 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1171 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1173 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1174 assert(C->getType()->isIntOrIntVector() && "SExt operand must be integral");
1175 assert(Ty->isIntOrIntVector() && "SExt produces only integer");
1176 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1177 "SrcTy must be smaller than DestTy for SExt!");
1179 return getFoldedCast(Instruction::SExt, C, Ty);
1182 Constant *ConstantExpr::getZExt(Constant *C, const Type *Ty) {
1184 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1185 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1187 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1188 assert(C->getType()->isIntOrIntVector() && "ZEXt operand must be integral");
1189 assert(Ty->isIntOrIntVector() && "ZExt produces only integer");
1190 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1191 "SrcTy must be smaller than DestTy for ZExt!");
1193 return getFoldedCast(Instruction::ZExt, C, Ty);
1196 Constant *ConstantExpr::getFPTrunc(Constant *C, const Type *Ty) {
1198 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1199 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1201 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1202 assert(C->getType()->isFPOrFPVector() && Ty->isFPOrFPVector() &&
1203 C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1204 "This is an illegal floating point truncation!");
1205 return getFoldedCast(Instruction::FPTrunc, C, Ty);
1208 Constant *ConstantExpr::getFPExtend(Constant *C, const Type *Ty) {
1210 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1211 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1213 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1214 assert(C->getType()->isFPOrFPVector() && Ty->isFPOrFPVector() &&
1215 C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1216 "This is an illegal floating point extension!");
1217 return getFoldedCast(Instruction::FPExt, C, Ty);
1220 Constant *ConstantExpr::getUIToFP(Constant *C, const Type *Ty) {
1222 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1223 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1225 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1226 assert(C->getType()->isIntOrIntVector() && Ty->isFPOrFPVector() &&
1227 "This is an illegal uint to floating point cast!");
1228 return getFoldedCast(Instruction::UIToFP, C, Ty);
1231 Constant *ConstantExpr::getSIToFP(Constant *C, const Type *Ty) {
1233 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1234 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1236 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1237 assert(C->getType()->isIntOrIntVector() && Ty->isFPOrFPVector() &&
1238 "This is an illegal sint to floating point cast!");
1239 return getFoldedCast(Instruction::SIToFP, C, Ty);
1242 Constant *ConstantExpr::getFPToUI(Constant *C, const Type *Ty) {
1244 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1245 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1247 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1248 assert(C->getType()->isFPOrFPVector() && Ty->isIntOrIntVector() &&
1249 "This is an illegal floating point to uint cast!");
1250 return getFoldedCast(Instruction::FPToUI, C, Ty);
1253 Constant *ConstantExpr::getFPToSI(Constant *C, const Type *Ty) {
1255 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1256 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1258 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1259 assert(C->getType()->isFPOrFPVector() && Ty->isIntOrIntVector() &&
1260 "This is an illegal floating point to sint cast!");
1261 return getFoldedCast(Instruction::FPToSI, C, Ty);
1264 Constant *ConstantExpr::getPtrToInt(Constant *C, const Type *DstTy) {
1265 assert(isa<PointerType>(C->getType()) && "PtrToInt source must be pointer");
1266 assert(DstTy->isInteger() && "PtrToInt destination must be integral");
1267 return getFoldedCast(Instruction::PtrToInt, C, DstTy);
1270 Constant *ConstantExpr::getIntToPtr(Constant *C, const Type *DstTy) {
1271 assert(C->getType()->isInteger() && "IntToPtr source must be integral");
1272 assert(isa<PointerType>(DstTy) && "IntToPtr destination must be a pointer");
1273 return getFoldedCast(Instruction::IntToPtr, C, DstTy);
1276 Constant *ConstantExpr::getBitCast(Constant *C, const Type *DstTy) {
1277 // BitCast implies a no-op cast of type only. No bits change. However, you
1278 // can't cast pointers to anything but pointers.
1280 const Type *SrcTy = C->getType();
1281 assert((isa<PointerType>(SrcTy) == isa<PointerType>(DstTy)) &&
1282 "BitCast cannot cast pointer to non-pointer and vice versa");
1284 // Now we know we're not dealing with mismatched pointer casts (ptr->nonptr
1285 // or nonptr->ptr). For all the other types, the cast is okay if source and
1286 // destination bit widths are identical.
1287 unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
1288 unsigned DstBitSize = DstTy->getPrimitiveSizeInBits();
1290 assert(SrcBitSize == DstBitSize && "BitCast requires types of same width");
1292 // It is common to ask for a bitcast of a value to its own type, handle this
1294 if (C->getType() == DstTy) return C;
1296 return getFoldedCast(Instruction::BitCast, C, DstTy);
1299 Constant *ConstantExpr::getTy(const Type *ReqTy, unsigned Opcode,
1300 Constant *C1, Constant *C2,
1302 // Check the operands for consistency first
1303 assert(Opcode >= Instruction::BinaryOpsBegin &&
1304 Opcode < Instruction::BinaryOpsEnd &&
1305 "Invalid opcode in binary constant expression");
1306 assert(C1->getType() == C2->getType() &&
1307 "Operand types in binary constant expression should match");
1309 if (ReqTy == C1->getType() || ReqTy == Type::getInt1Ty(ReqTy->getContext()))
1310 if (Constant *FC = ConstantFoldBinaryInstruction(ReqTy->getContext(),
1312 return FC; // Fold a few common cases...
1314 std::vector<Constant*> argVec(1, C1); argVec.push_back(C2);
1315 ExprMapKeyType Key(Opcode, argVec, 0, Flags);
1317 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1319 // Implicitly locked.
1320 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1323 Constant *ConstantExpr::getCompareTy(unsigned short predicate,
1324 Constant *C1, Constant *C2) {
1325 switch (predicate) {
1326 default: llvm_unreachable("Invalid CmpInst predicate");
1327 case CmpInst::FCMP_FALSE: case CmpInst::FCMP_OEQ: case CmpInst::FCMP_OGT:
1328 case CmpInst::FCMP_OGE: case CmpInst::FCMP_OLT: case CmpInst::FCMP_OLE:
1329 case CmpInst::FCMP_ONE: case CmpInst::FCMP_ORD: case CmpInst::FCMP_UNO:
1330 case CmpInst::FCMP_UEQ: case CmpInst::FCMP_UGT: case CmpInst::FCMP_UGE:
1331 case CmpInst::FCMP_ULT: case CmpInst::FCMP_ULE: case CmpInst::FCMP_UNE:
1332 case CmpInst::FCMP_TRUE:
1333 return getFCmp(predicate, C1, C2);
1335 case CmpInst::ICMP_EQ: case CmpInst::ICMP_NE: case CmpInst::ICMP_UGT:
1336 case CmpInst::ICMP_UGE: case CmpInst::ICMP_ULT: case CmpInst::ICMP_ULE:
1337 case CmpInst::ICMP_SGT: case CmpInst::ICMP_SGE: case CmpInst::ICMP_SLT:
1338 case CmpInst::ICMP_SLE:
1339 return getICmp(predicate, C1, C2);
1343 Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2,
1345 // API compatibility: Adjust integer opcodes to floating-point opcodes.
1346 if (C1->getType()->isFPOrFPVector()) {
1347 if (Opcode == Instruction::Add) Opcode = Instruction::FAdd;
1348 else if (Opcode == Instruction::Sub) Opcode = Instruction::FSub;
1349 else if (Opcode == Instruction::Mul) Opcode = Instruction::FMul;
1353 case Instruction::Add:
1354 case Instruction::Sub:
1355 case Instruction::Mul:
1356 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1357 assert(C1->getType()->isIntOrIntVector() &&
1358 "Tried to create an integer operation on a non-integer type!");
1360 case Instruction::FAdd:
1361 case Instruction::FSub:
1362 case Instruction::FMul:
1363 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1364 assert(C1->getType()->isFPOrFPVector() &&
1365 "Tried to create a floating-point operation on a "
1366 "non-floating-point type!");
1368 case Instruction::UDiv:
1369 case Instruction::SDiv:
1370 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1371 assert(C1->getType()->isIntOrIntVector() &&
1372 "Tried to create an arithmetic operation on a non-arithmetic type!");
1374 case Instruction::FDiv:
1375 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1376 assert(C1->getType()->isFPOrFPVector() &&
1377 "Tried to create an arithmetic operation on a non-arithmetic type!");
1379 case Instruction::URem:
1380 case Instruction::SRem:
1381 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1382 assert(C1->getType()->isIntOrIntVector() &&
1383 "Tried to create an arithmetic operation on a non-arithmetic type!");
1385 case Instruction::FRem:
1386 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1387 assert(C1->getType()->isFPOrFPVector() &&
1388 "Tried to create an arithmetic operation on a non-arithmetic type!");
1390 case Instruction::And:
1391 case Instruction::Or:
1392 case Instruction::Xor:
1393 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1394 assert(C1->getType()->isIntOrIntVector() &&
1395 "Tried to create a logical operation on a non-integral type!");
1397 case Instruction::Shl:
1398 case Instruction::LShr:
1399 case Instruction::AShr:
1400 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1401 assert(C1->getType()->isIntOrIntVector() &&
1402 "Tried to create a shift operation on a non-integer type!");
1409 return getTy(C1->getType(), Opcode, C1, C2, Flags);
1412 Constant* ConstantExpr::getSizeOf(const Type* Ty) {
1413 // sizeof is implemented as: (i64) gep (Ty*)null, 1
1414 // Note that a non-inbounds gep is used, as null isn't within any object.
1415 Constant *GEPIdx = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1416 Constant *GEP = getGetElementPtr(
1417 Constant::getNullValue(PointerType::getUnqual(Ty)), &GEPIdx, 1);
1418 return getCast(Instruction::PtrToInt, GEP,
1419 Type::getInt64Ty(Ty->getContext()));
1422 Constant* ConstantExpr::getAlignOf(const Type* Ty) {
1423 // alignof is implemented as: (i64) gep ({i8,Ty}*)null, 0, 1
1424 // Note that a non-inbounds gep is used, as null isn't within any object.
1425 const Type *AligningTy = StructType::get(Ty->getContext(),
1426 Type::getInt8Ty(Ty->getContext()), Ty, NULL);
1427 Constant *NullPtr = Constant::getNullValue(AligningTy->getPointerTo());
1428 Constant *Zero = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 0);
1429 Constant *One = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1430 Constant *Indices[2] = { Zero, One };
1431 Constant *GEP = getGetElementPtr(NullPtr, Indices, 2);
1432 return getCast(Instruction::PtrToInt, GEP,
1433 Type::getInt32Ty(Ty->getContext()));
1436 Constant* ConstantExpr::getOffsetOf(const StructType* STy, unsigned FieldNo) {
1437 // offsetof is implemented as: (i64) gep (Ty*)null, 0, FieldNo
1438 // Note that a non-inbounds gep is used, as null isn't within any object.
1439 Constant *GEPIdx[] = {
1440 ConstantInt::get(Type::getInt64Ty(STy->getContext()), 0),
1441 ConstantInt::get(Type::getInt32Ty(STy->getContext()), FieldNo)
1443 Constant *GEP = getGetElementPtr(
1444 Constant::getNullValue(PointerType::getUnqual(STy)), GEPIdx, 2);
1445 return getCast(Instruction::PtrToInt, GEP,
1446 Type::getInt64Ty(STy->getContext()));
1449 Constant *ConstantExpr::getCompare(unsigned short pred,
1450 Constant *C1, Constant *C2) {
1451 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1452 return getCompareTy(pred, C1, C2);
1455 Constant *ConstantExpr::getSelectTy(const Type *ReqTy, Constant *C,
1456 Constant *V1, Constant *V2) {
1457 assert(!SelectInst::areInvalidOperands(C, V1, V2)&&"Invalid select operands");
1459 if (ReqTy == V1->getType())
1460 if (Constant *SC = ConstantFoldSelectInstruction(
1461 ReqTy->getContext(), C, V1, V2))
1462 return SC; // Fold common cases
1464 std::vector<Constant*> argVec(3, C);
1467 ExprMapKeyType Key(Instruction::Select, argVec);
1469 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1471 // Implicitly locked.
1472 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1475 Constant *ConstantExpr::getGetElementPtrTy(const Type *ReqTy, Constant *C,
1478 assert(GetElementPtrInst::getIndexedType(C->getType(), Idxs,
1480 cast<PointerType>(ReqTy)->getElementType() &&
1481 "GEP indices invalid!");
1483 if (Constant *FC = ConstantFoldGetElementPtr(
1484 ReqTy->getContext(), C, /*inBounds=*/false,
1485 (Constant**)Idxs, NumIdx))
1486 return FC; // Fold a few common cases...
1488 assert(isa<PointerType>(C->getType()) &&
1489 "Non-pointer type for constant GetElementPtr expression");
1490 // Look up the constant in the table first to ensure uniqueness
1491 std::vector<Constant*> ArgVec;
1492 ArgVec.reserve(NumIdx+1);
1493 ArgVec.push_back(C);
1494 for (unsigned i = 0; i != NumIdx; ++i)
1495 ArgVec.push_back(cast<Constant>(Idxs[i]));
1496 const ExprMapKeyType Key(Instruction::GetElementPtr, ArgVec);
1498 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1500 // Implicitly locked.
1501 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1504 Constant *ConstantExpr::getInBoundsGetElementPtrTy(const Type *ReqTy,
1508 assert(GetElementPtrInst::getIndexedType(C->getType(), Idxs,
1510 cast<PointerType>(ReqTy)->getElementType() &&
1511 "GEP indices invalid!");
1513 if (Constant *FC = ConstantFoldGetElementPtr(
1514 ReqTy->getContext(), C, /*inBounds=*/true,
1515 (Constant**)Idxs, NumIdx))
1516 return FC; // Fold a few common cases...
1518 assert(isa<PointerType>(C->getType()) &&
1519 "Non-pointer type for constant GetElementPtr expression");
1520 // Look up the constant in the table first to ensure uniqueness
1521 std::vector<Constant*> ArgVec;
1522 ArgVec.reserve(NumIdx+1);
1523 ArgVec.push_back(C);
1524 for (unsigned i = 0; i != NumIdx; ++i)
1525 ArgVec.push_back(cast<Constant>(Idxs[i]));
1526 const ExprMapKeyType Key(Instruction::GetElementPtr, ArgVec, 0,
1527 GEPOperator::IsInBounds);
1529 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1531 // Implicitly locked.
1532 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1535 Constant *ConstantExpr::getGetElementPtr(Constant *C, Value* const *Idxs,
1537 // Get the result type of the getelementptr!
1539 GetElementPtrInst::getIndexedType(C->getType(), Idxs, Idxs+NumIdx);
1540 assert(Ty && "GEP indices invalid!");
1541 unsigned As = cast<PointerType>(C->getType())->getAddressSpace();
1542 return getGetElementPtrTy(PointerType::get(Ty, As), C, Idxs, NumIdx);
1545 Constant *ConstantExpr::getInBoundsGetElementPtr(Constant *C,
1548 // Get the result type of the getelementptr!
1550 GetElementPtrInst::getIndexedType(C->getType(), Idxs, Idxs+NumIdx);
1551 assert(Ty && "GEP indices invalid!");
1552 unsigned As = cast<PointerType>(C->getType())->getAddressSpace();
1553 return getInBoundsGetElementPtrTy(PointerType::get(Ty, As), C, Idxs, NumIdx);
1556 Constant *ConstantExpr::getGetElementPtr(Constant *C, Constant* const *Idxs,
1558 return getGetElementPtr(C, (Value* const *)Idxs, NumIdx);
1561 Constant *ConstantExpr::getInBoundsGetElementPtr(Constant *C,
1562 Constant* const *Idxs,
1564 return getInBoundsGetElementPtr(C, (Value* const *)Idxs, NumIdx);
1568 ConstantExpr::getICmp(unsigned short pred, Constant* LHS, Constant* RHS) {
1569 assert(LHS->getType() == RHS->getType());
1570 assert(pred >= ICmpInst::FIRST_ICMP_PREDICATE &&
1571 pred <= ICmpInst::LAST_ICMP_PREDICATE && "Invalid ICmp Predicate");
1573 if (Constant *FC = ConstantFoldCompareInstruction(
1574 LHS->getContext(), pred, LHS, RHS))
1575 return FC; // Fold a few common cases...
1577 // Look up the constant in the table first to ensure uniqueness
1578 std::vector<Constant*> ArgVec;
1579 ArgVec.push_back(LHS);
1580 ArgVec.push_back(RHS);
1581 // Get the key type with both the opcode and predicate
1582 const ExprMapKeyType Key(Instruction::ICmp, ArgVec, pred);
1584 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
1586 // Implicitly locked.
1588 pImpl->ExprConstants.getOrCreate(Type::getInt1Ty(LHS->getContext()), Key);
1592 ConstantExpr::getFCmp(unsigned short pred, Constant* LHS, Constant* RHS) {
1593 assert(LHS->getType() == RHS->getType());
1594 assert(pred <= FCmpInst::LAST_FCMP_PREDICATE && "Invalid FCmp Predicate");
1596 if (Constant *FC = ConstantFoldCompareInstruction(
1597 LHS->getContext(), pred, LHS, RHS))
1598 return FC; // Fold a few common cases...
1600 // Look up the constant in the table first to ensure uniqueness
1601 std::vector<Constant*> ArgVec;
1602 ArgVec.push_back(LHS);
1603 ArgVec.push_back(RHS);
1604 // Get the key type with both the opcode and predicate
1605 const ExprMapKeyType Key(Instruction::FCmp, ArgVec, pred);
1607 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
1609 // Implicitly locked.
1611 pImpl->ExprConstants.getOrCreate(Type::getInt1Ty(LHS->getContext()), Key);
1614 Constant *ConstantExpr::getExtractElementTy(const Type *ReqTy, Constant *Val,
1616 if (Constant *FC = ConstantFoldExtractElementInstruction(
1617 ReqTy->getContext(), Val, Idx))
1618 return FC; // Fold a few common cases...
1619 // Look up the constant in the table first to ensure uniqueness
1620 std::vector<Constant*> ArgVec(1, Val);
1621 ArgVec.push_back(Idx);
1622 const ExprMapKeyType Key(Instruction::ExtractElement,ArgVec);
1624 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1626 // Implicitly locked.
1627 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1630 Constant *ConstantExpr::getExtractElement(Constant *Val, Constant *Idx) {
1631 assert(isa<VectorType>(Val->getType()) &&
1632 "Tried to create extractelement operation on non-vector type!");
1633 assert(Idx->getType() == Type::getInt32Ty(Val->getContext()) &&
1634 "Extractelement index must be i32 type!");
1635 return getExtractElementTy(cast<VectorType>(Val->getType())->getElementType(),
1639 Constant *ConstantExpr::getInsertElementTy(const Type *ReqTy, Constant *Val,
1640 Constant *Elt, Constant *Idx) {
1641 if (Constant *FC = ConstantFoldInsertElementInstruction(
1642 ReqTy->getContext(), Val, Elt, Idx))
1643 return FC; // Fold a few common cases...
1644 // Look up the constant in the table first to ensure uniqueness
1645 std::vector<Constant*> ArgVec(1, Val);
1646 ArgVec.push_back(Elt);
1647 ArgVec.push_back(Idx);
1648 const ExprMapKeyType Key(Instruction::InsertElement,ArgVec);
1650 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1652 // Implicitly locked.
1653 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1656 Constant *ConstantExpr::getInsertElement(Constant *Val, Constant *Elt,
1658 assert(isa<VectorType>(Val->getType()) &&
1659 "Tried to create insertelement operation on non-vector type!");
1660 assert(Elt->getType() == cast<VectorType>(Val->getType())->getElementType()
1661 && "Insertelement types must match!");
1662 assert(Idx->getType() == Type::getInt32Ty(Val->getContext()) &&
1663 "Insertelement index must be i32 type!");
1664 return getInsertElementTy(Val->getType(), Val, Elt, Idx);
1667 Constant *ConstantExpr::getShuffleVectorTy(const Type *ReqTy, Constant *V1,
1668 Constant *V2, Constant *Mask) {
1669 if (Constant *FC = ConstantFoldShuffleVectorInstruction(
1670 ReqTy->getContext(), V1, V2, Mask))
1671 return FC; // Fold a few common cases...
1672 // Look up the constant in the table first to ensure uniqueness
1673 std::vector<Constant*> ArgVec(1, V1);
1674 ArgVec.push_back(V2);
1675 ArgVec.push_back(Mask);
1676 const ExprMapKeyType Key(Instruction::ShuffleVector,ArgVec);
1678 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1680 // Implicitly locked.
1681 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1684 Constant *ConstantExpr::getShuffleVector(Constant *V1, Constant *V2,
1686 assert(ShuffleVectorInst::isValidOperands(V1, V2, Mask) &&
1687 "Invalid shuffle vector constant expr operands!");
1689 unsigned NElts = cast<VectorType>(Mask->getType())->getNumElements();
1690 const Type *EltTy = cast<VectorType>(V1->getType())->getElementType();
1691 const Type *ShufTy = VectorType::get(EltTy, NElts);
1692 return getShuffleVectorTy(ShufTy, V1, V2, Mask);
1695 Constant *ConstantExpr::getInsertValueTy(const Type *ReqTy, Constant *Agg,
1697 const unsigned *Idxs, unsigned NumIdx) {
1698 assert(ExtractValueInst::getIndexedType(Agg->getType(), Idxs,
1699 Idxs+NumIdx) == Val->getType() &&
1700 "insertvalue indices invalid!");
1701 assert(Agg->getType() == ReqTy &&
1702 "insertvalue type invalid!");
1703 assert(Agg->getType()->isFirstClassType() &&
1704 "Non-first-class type for constant InsertValue expression");
1705 Constant *FC = ConstantFoldInsertValueInstruction(
1706 ReqTy->getContext(), Agg, Val, Idxs, NumIdx);
1707 assert(FC && "InsertValue constant expr couldn't be folded!");
1711 Constant *ConstantExpr::getInsertValue(Constant *Agg, Constant *Val,
1712 const unsigned *IdxList, unsigned NumIdx) {
1713 assert(Agg->getType()->isFirstClassType() &&
1714 "Tried to create insertelement operation on non-first-class type!");
1716 const Type *ReqTy = Agg->getType();
1719 ExtractValueInst::getIndexedType(Agg->getType(), IdxList, IdxList+NumIdx);
1721 assert(ValTy == Val->getType() && "insertvalue indices invalid!");
1722 return getInsertValueTy(ReqTy, Agg, Val, IdxList, NumIdx);
1725 Constant *ConstantExpr::getExtractValueTy(const Type *ReqTy, Constant *Agg,
1726 const unsigned *Idxs, unsigned NumIdx) {
1727 assert(ExtractValueInst::getIndexedType(Agg->getType(), Idxs,
1728 Idxs+NumIdx) == ReqTy &&
1729 "extractvalue indices invalid!");
1730 assert(Agg->getType()->isFirstClassType() &&
1731 "Non-first-class type for constant extractvalue expression");
1732 Constant *FC = ConstantFoldExtractValueInstruction(
1733 ReqTy->getContext(), Agg, Idxs, NumIdx);
1734 assert(FC && "ExtractValue constant expr couldn't be folded!");
1738 Constant *ConstantExpr::getExtractValue(Constant *Agg,
1739 const unsigned *IdxList, unsigned NumIdx) {
1740 assert(Agg->getType()->isFirstClassType() &&
1741 "Tried to create extractelement operation on non-first-class type!");
1744 ExtractValueInst::getIndexedType(Agg->getType(), IdxList, IdxList+NumIdx);
1745 assert(ReqTy && "extractvalue indices invalid!");
1746 return getExtractValueTy(ReqTy, Agg, IdxList, NumIdx);
1749 Constant* ConstantExpr::getNeg(Constant* C) {
1750 // API compatibility: Adjust integer opcodes to floating-point opcodes.
1751 if (C->getType()->isFPOrFPVector())
1753 assert(C->getType()->isIntOrIntVector() &&
1754 "Cannot NEG a nonintegral value!");
1755 return get(Instruction::Sub,
1756 ConstantFP::getZeroValueForNegation(C->getType()),
1760 Constant* ConstantExpr::getFNeg(Constant* C) {
1761 assert(C->getType()->isFPOrFPVector() &&
1762 "Cannot FNEG a non-floating-point value!");
1763 return get(Instruction::FSub,
1764 ConstantFP::getZeroValueForNegation(C->getType()),
1768 Constant* ConstantExpr::getNot(Constant* C) {
1769 assert(C->getType()->isIntOrIntVector() &&
1770 "Cannot NOT a nonintegral value!");
1771 return get(Instruction::Xor, C, Constant::getAllOnesValue(C->getType()));
1774 Constant* ConstantExpr::getAdd(Constant* C1, Constant* C2) {
1775 return get(Instruction::Add, C1, C2);
1778 Constant* ConstantExpr::getFAdd(Constant* C1, Constant* C2) {
1779 return get(Instruction::FAdd, C1, C2);
1782 Constant* ConstantExpr::getSub(Constant* C1, Constant* C2) {
1783 return get(Instruction::Sub, C1, C2);
1786 Constant* ConstantExpr::getFSub(Constant* C1, Constant* C2) {
1787 return get(Instruction::FSub, C1, C2);
1790 Constant* ConstantExpr::getMul(Constant* C1, Constant* C2) {
1791 return get(Instruction::Mul, C1, C2);
1794 Constant* ConstantExpr::getFMul(Constant* C1, Constant* C2) {
1795 return get(Instruction::FMul, C1, C2);
1798 Constant* ConstantExpr::getUDiv(Constant* C1, Constant* C2) {
1799 return get(Instruction::UDiv, C1, C2);
1802 Constant* ConstantExpr::getSDiv(Constant* C1, Constant* C2) {
1803 return get(Instruction::SDiv, C1, C2);
1806 Constant* ConstantExpr::getFDiv(Constant* C1, Constant* C2) {
1807 return get(Instruction::FDiv, C1, C2);
1810 Constant* ConstantExpr::getURem(Constant* C1, Constant* C2) {
1811 return get(Instruction::URem, C1, C2);
1814 Constant* ConstantExpr::getSRem(Constant* C1, Constant* C2) {
1815 return get(Instruction::SRem, C1, C2);
1818 Constant* ConstantExpr::getFRem(Constant* C1, Constant* C2) {
1819 return get(Instruction::FRem, C1, C2);
1822 Constant* ConstantExpr::getAnd(Constant* C1, Constant* C2) {
1823 return get(Instruction::And, C1, C2);
1826 Constant* ConstantExpr::getOr(Constant* C1, Constant* C2) {
1827 return get(Instruction::Or, C1, C2);
1830 Constant* ConstantExpr::getXor(Constant* C1, Constant* C2) {
1831 return get(Instruction::Xor, C1, C2);
1834 Constant* ConstantExpr::getShl(Constant* C1, Constant* C2) {
1835 return get(Instruction::Shl, C1, C2);
1838 Constant* ConstantExpr::getLShr(Constant* C1, Constant* C2) {
1839 return get(Instruction::LShr, C1, C2);
1842 Constant* ConstantExpr::getAShr(Constant* C1, Constant* C2) {
1843 return get(Instruction::AShr, C1, C2);
1846 // destroyConstant - Remove the constant from the constant table...
1848 void ConstantExpr::destroyConstant() {
1849 // Implicitly locked.
1850 LLVMContextImpl *pImpl = getType()->getContext().pImpl;
1851 pImpl->ExprConstants.remove(this);
1852 destroyConstantImpl();
1855 const char *ConstantExpr::getOpcodeName() const {
1856 return Instruction::getOpcodeName(getOpcode());
1859 //===----------------------------------------------------------------------===//
1860 // replaceUsesOfWithOnConstant implementations
1862 /// replaceUsesOfWithOnConstant - Update this constant array to change uses of
1863 /// 'From' to be uses of 'To'. This must update the uniquing data structures
1866 /// Note that we intentionally replace all uses of From with To here. Consider
1867 /// a large array that uses 'From' 1000 times. By handling this case all here,
1868 /// ConstantArray::replaceUsesOfWithOnConstant is only invoked once, and that
1869 /// single invocation handles all 1000 uses. Handling them one at a time would
1870 /// work, but would be really slow because it would have to unique each updated
1873 void ConstantArray::replaceUsesOfWithOnConstant(Value *From, Value *To,
1875 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
1876 Constant *ToC = cast<Constant>(To);
1878 LLVMContext &Context = getType()->getContext();
1879 LLVMContextImpl *pImpl = Context.pImpl;
1881 std::pair<LLVMContextImpl::ArrayConstantsTy::MapKey, ConstantArray*> Lookup;
1882 Lookup.first.first = getType();
1883 Lookup.second = this;
1885 std::vector<Constant*> &Values = Lookup.first.second;
1886 Values.reserve(getNumOperands()); // Build replacement array.
1888 // Fill values with the modified operands of the constant array. Also,
1889 // compute whether this turns into an all-zeros array.
1890 bool isAllZeros = false;
1891 unsigned NumUpdated = 0;
1892 if (!ToC->isNullValue()) {
1893 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
1894 Constant *Val = cast<Constant>(O->get());
1899 Values.push_back(Val);
1903 for (Use *O = OperandList, *E = OperandList+getNumOperands();O != E; ++O) {
1904 Constant *Val = cast<Constant>(O->get());
1909 Values.push_back(Val);
1910 if (isAllZeros) isAllZeros = Val->isNullValue();
1914 Constant *Replacement = 0;
1916 Replacement = ConstantAggregateZero::get(getType());
1918 // Check to see if we have this array type already.
1919 sys::SmartScopedWriter<true> Writer(pImpl->ConstantsLock);
1921 LLVMContextImpl::ArrayConstantsTy::MapTy::iterator I =
1922 pImpl->ArrayConstants.InsertOrGetItem(Lookup, Exists);
1925 Replacement = I->second;
1927 // Okay, the new shape doesn't exist in the system yet. Instead of
1928 // creating a new constant array, inserting it, replaceallusesof'ing the
1929 // old with the new, then deleting the old... just update the current one
1931 pImpl->ArrayConstants.MoveConstantToNewSlot(this, I);
1933 // Update to the new value. Optimize for the case when we have a single
1934 // operand that we're changing, but handle bulk updates efficiently.
1935 if (NumUpdated == 1) {
1936 unsigned OperandToUpdate = U - OperandList;
1937 assert(getOperand(OperandToUpdate) == From &&
1938 "ReplaceAllUsesWith broken!");
1939 setOperand(OperandToUpdate, ToC);
1941 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
1942 if (getOperand(i) == From)
1949 // Otherwise, I do need to replace this with an existing value.
1950 assert(Replacement != this && "I didn't contain From!");
1952 // Everyone using this now uses the replacement.
1953 uncheckedReplaceAllUsesWith(Replacement);
1955 // Delete the old constant!
1959 void ConstantStruct::replaceUsesOfWithOnConstant(Value *From, Value *To,
1961 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
1962 Constant *ToC = cast<Constant>(To);
1964 unsigned OperandToUpdate = U-OperandList;
1965 assert(getOperand(OperandToUpdate) == From && "ReplaceAllUsesWith broken!");
1967 std::pair<LLVMContextImpl::StructConstantsTy::MapKey, ConstantStruct*> Lookup;
1968 Lookup.first.first = getType();
1969 Lookup.second = this;
1970 std::vector<Constant*> &Values = Lookup.first.second;
1971 Values.reserve(getNumOperands()); // Build replacement struct.
1974 // Fill values with the modified operands of the constant struct. Also,
1975 // compute whether this turns into an all-zeros struct.
1976 bool isAllZeros = false;
1977 if (!ToC->isNullValue()) {
1978 for (Use *O = OperandList, *E = OperandList + getNumOperands(); O != E; ++O)
1979 Values.push_back(cast<Constant>(O->get()));
1982 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
1983 Constant *Val = cast<Constant>(O->get());
1984 Values.push_back(Val);
1985 if (isAllZeros) isAllZeros = Val->isNullValue();
1988 Values[OperandToUpdate] = ToC;
1990 LLVMContext &Context = getType()->getContext();
1991 LLVMContextImpl *pImpl = Context.pImpl;
1993 Constant *Replacement = 0;
1995 Replacement = ConstantAggregateZero::get(getType());
1997 // Check to see if we have this array type already.
1998 sys::SmartScopedWriter<true> Writer(pImpl->ConstantsLock);
2000 LLVMContextImpl::StructConstantsTy::MapTy::iterator I =
2001 pImpl->StructConstants.InsertOrGetItem(Lookup, Exists);
2004 Replacement = I->second;
2006 // Okay, the new shape doesn't exist in the system yet. Instead of
2007 // creating a new constant struct, inserting it, replaceallusesof'ing the
2008 // old with the new, then deleting the old... just update the current one
2010 pImpl->StructConstants.MoveConstantToNewSlot(this, I);
2012 // Update to the new value.
2013 setOperand(OperandToUpdate, ToC);
2018 assert(Replacement != this && "I didn't contain From!");
2020 // Everyone using this now uses the replacement.
2021 uncheckedReplaceAllUsesWith(Replacement);
2023 // Delete the old constant!
2027 void ConstantVector::replaceUsesOfWithOnConstant(Value *From, Value *To,
2029 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2031 std::vector<Constant*> Values;
2032 Values.reserve(getNumOperands()); // Build replacement array...
2033 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
2034 Constant *Val = getOperand(i);
2035 if (Val == From) Val = cast<Constant>(To);
2036 Values.push_back(Val);
2039 Constant *Replacement = get(getType(), Values);
2040 assert(Replacement != this && "I didn't contain From!");
2042 // Everyone using this now uses the replacement.
2043 uncheckedReplaceAllUsesWith(Replacement);
2045 // Delete the old constant!
2049 void ConstantExpr::replaceUsesOfWithOnConstant(Value *From, Value *ToV,
2051 assert(isa<Constant>(ToV) && "Cannot make Constant refer to non-constant!");
2052 Constant *To = cast<Constant>(ToV);
2054 Constant *Replacement = 0;
2055 if (getOpcode() == Instruction::GetElementPtr) {
2056 SmallVector<Constant*, 8> Indices;
2057 Constant *Pointer = getOperand(0);
2058 Indices.reserve(getNumOperands()-1);
2059 if (Pointer == From) Pointer = To;
2061 for (unsigned i = 1, e = getNumOperands(); i != e; ++i) {
2062 Constant *Val = getOperand(i);
2063 if (Val == From) Val = To;
2064 Indices.push_back(Val);
2066 Replacement = ConstantExpr::getGetElementPtr(Pointer,
2067 &Indices[0], Indices.size());
2068 } else if (getOpcode() == Instruction::ExtractValue) {
2069 Constant *Agg = getOperand(0);
2070 if (Agg == From) Agg = To;
2072 const SmallVector<unsigned, 4> &Indices = getIndices();
2073 Replacement = ConstantExpr::getExtractValue(Agg,
2074 &Indices[0], Indices.size());
2075 } else if (getOpcode() == Instruction::InsertValue) {
2076 Constant *Agg = getOperand(0);
2077 Constant *Val = getOperand(1);
2078 if (Agg == From) Agg = To;
2079 if (Val == From) Val = To;
2081 const SmallVector<unsigned, 4> &Indices = getIndices();
2082 Replacement = ConstantExpr::getInsertValue(Agg, Val,
2083 &Indices[0], Indices.size());
2084 } else if (isCast()) {
2085 assert(getOperand(0) == From && "Cast only has one use!");
2086 Replacement = ConstantExpr::getCast(getOpcode(), To, getType());
2087 } else if (getOpcode() == Instruction::Select) {
2088 Constant *C1 = getOperand(0);
2089 Constant *C2 = getOperand(1);
2090 Constant *C3 = getOperand(2);
2091 if (C1 == From) C1 = To;
2092 if (C2 == From) C2 = To;
2093 if (C3 == From) C3 = To;
2094 Replacement = ConstantExpr::getSelect(C1, C2, C3);
2095 } else if (getOpcode() == Instruction::ExtractElement) {
2096 Constant *C1 = getOperand(0);
2097 Constant *C2 = getOperand(1);
2098 if (C1 == From) C1 = To;
2099 if (C2 == From) C2 = To;
2100 Replacement = ConstantExpr::getExtractElement(C1, C2);
2101 } else if (getOpcode() == Instruction::InsertElement) {
2102 Constant *C1 = getOperand(0);
2103 Constant *C2 = getOperand(1);
2104 Constant *C3 = getOperand(1);
2105 if (C1 == From) C1 = To;
2106 if (C2 == From) C2 = To;
2107 if (C3 == From) C3 = To;
2108 Replacement = ConstantExpr::getInsertElement(C1, C2, C3);
2109 } else if (getOpcode() == Instruction::ShuffleVector) {
2110 Constant *C1 = getOperand(0);
2111 Constant *C2 = getOperand(1);
2112 Constant *C3 = getOperand(2);
2113 if (C1 == From) C1 = To;
2114 if (C2 == From) C2 = To;
2115 if (C3 == From) C3 = To;
2116 Replacement = ConstantExpr::getShuffleVector(C1, C2, C3);
2117 } else if (isCompare()) {
2118 Constant *C1 = getOperand(0);
2119 Constant *C2 = getOperand(1);
2120 if (C1 == From) C1 = To;
2121 if (C2 == From) C2 = To;
2122 if (getOpcode() == Instruction::ICmp)
2123 Replacement = ConstantExpr::getICmp(getPredicate(), C1, C2);
2125 assert(getOpcode() == Instruction::FCmp);
2126 Replacement = ConstantExpr::getFCmp(getPredicate(), C1, C2);
2128 } else if (getNumOperands() == 2) {
2129 Constant *C1 = getOperand(0);
2130 Constant *C2 = getOperand(1);
2131 if (C1 == From) C1 = To;
2132 if (C2 == From) C2 = To;
2133 Replacement = ConstantExpr::get(getOpcode(), C1, C2, SubclassData);
2135 llvm_unreachable("Unknown ConstantExpr type!");
2139 assert(Replacement != this && "I didn't contain From!");
2141 // Everyone using this now uses the replacement.
2142 uncheckedReplaceAllUsesWith(Replacement);
2144 // Delete the old constant!