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/ADT/DenseMap.h"
33 #include "llvm/ADT/SmallVector.h"
38 //===----------------------------------------------------------------------===//
40 //===----------------------------------------------------------------------===//
42 // Constructor to create a '0' constant of arbitrary type...
43 Constant *Constant::getNullValue(const Type *Ty) {
44 switch (Ty->getTypeID()) {
45 case Type::IntegerTyID:
46 return ConstantInt::get(Ty, 0);
48 return ConstantFP::get(Ty->getContext(),
49 APFloat::getZero(APFloat::IEEEsingle));
50 case Type::DoubleTyID:
51 return ConstantFP::get(Ty->getContext(),
52 APFloat::getZero(APFloat::IEEEdouble));
53 case Type::X86_FP80TyID:
54 return ConstantFP::get(Ty->getContext(),
55 APFloat::getZero(APFloat::x87DoubleExtended));
57 return ConstantFP::get(Ty->getContext(),
58 APFloat::getZero(APFloat::IEEEquad));
59 case Type::PPC_FP128TyID:
60 return ConstantFP::get(Ty->getContext(),
61 APFloat(APInt::getNullValue(128)));
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 dbgs() << "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 (CE->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>(CE->getOperand(1)) ||CE->getOperand(1)->isNullValue())
163 /// isConstantUsed - Return true if the constant has users other than constant
164 /// exprs and other dangling things.
165 bool Constant::isConstantUsed() const {
166 for (const_use_iterator UI = use_begin(), E = use_end(); UI != E; ++UI) {
167 const Constant *UC = dyn_cast<Constant>(*UI);
168 if (UC == 0 || isa<GlobalValue>(UC))
171 if (UC->isConstantUsed())
179 /// getRelocationInfo - This method classifies the entry according to
180 /// whether or not it may generate a relocation entry. This must be
181 /// conservative, so if it might codegen to a relocatable entry, it should say
182 /// so. The return values are:
184 /// NoRelocation: This constant pool entry is guaranteed to never have a
185 /// relocation applied to it (because it holds a simple constant like
187 /// LocalRelocation: This entry has relocations, but the entries are
188 /// guaranteed to be resolvable by the static linker, so the dynamic
189 /// linker will never see them.
190 /// GlobalRelocations: This entry may have arbitrary relocations.
192 /// FIXME: This really should not be in VMCore.
193 Constant::PossibleRelocationsTy Constant::getRelocationInfo() const {
194 if (const GlobalValue *GV = dyn_cast<GlobalValue>(this)) {
195 if (GV->hasLocalLinkage() || GV->hasHiddenVisibility())
196 return LocalRelocation; // Local to this file/library.
197 return GlobalRelocations; // Global reference.
200 if (const BlockAddress *BA = dyn_cast<BlockAddress>(this))
201 return BA->getFunction()->getRelocationInfo();
203 // While raw uses of blockaddress need to be relocated, differences between
204 // two of them don't when they are for labels in the same function. This is a
205 // common idiom when creating a table for the indirect goto extension, so we
206 // handle it efficiently here.
207 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(this))
208 if (CE->getOpcode() == Instruction::Sub) {
209 ConstantExpr *LHS = dyn_cast<ConstantExpr>(CE->getOperand(0));
210 ConstantExpr *RHS = dyn_cast<ConstantExpr>(CE->getOperand(1));
212 LHS->getOpcode() == Instruction::PtrToInt &&
213 RHS->getOpcode() == Instruction::PtrToInt &&
214 isa<BlockAddress>(LHS->getOperand(0)) &&
215 isa<BlockAddress>(RHS->getOperand(0)) &&
216 cast<BlockAddress>(LHS->getOperand(0))->getFunction() ==
217 cast<BlockAddress>(RHS->getOperand(0))->getFunction())
221 PossibleRelocationsTy Result = NoRelocation;
222 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
223 Result = std::max(Result,
224 cast<Constant>(getOperand(i))->getRelocationInfo());
230 /// getVectorElements - This method, which is only valid on constant of vector
231 /// type, returns the elements of the vector in the specified smallvector.
232 /// This handles breaking down a vector undef into undef elements, etc. For
233 /// constant exprs and other cases we can't handle, we return an empty vector.
234 void Constant::getVectorElements(SmallVectorImpl<Constant*> &Elts) const {
235 assert(getType()->isVectorTy() && "Not a vector constant!");
237 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this)) {
238 for (unsigned i = 0, e = CV->getNumOperands(); i != e; ++i)
239 Elts.push_back(CV->getOperand(i));
243 const VectorType *VT = cast<VectorType>(getType());
244 if (isa<ConstantAggregateZero>(this)) {
245 Elts.assign(VT->getNumElements(),
246 Constant::getNullValue(VT->getElementType()));
250 if (isa<UndefValue>(this)) {
251 Elts.assign(VT->getNumElements(), UndefValue::get(VT->getElementType()));
255 // Unknown type, must be constant expr etc.
260 //===----------------------------------------------------------------------===//
262 //===----------------------------------------------------------------------===//
264 ConstantInt::ConstantInt(const IntegerType *Ty, const APInt& V)
265 : Constant(Ty, ConstantIntVal, 0, 0), Val(V) {
266 assert(V.getBitWidth() == Ty->getBitWidth() && "Invalid constant for type");
269 ConstantInt* ConstantInt::getTrue(LLVMContext &Context) {
270 LLVMContextImpl *pImpl = Context.pImpl;
271 if (!pImpl->TheTrueVal)
272 pImpl->TheTrueVal = ConstantInt::get(Type::getInt1Ty(Context), 1);
273 return pImpl->TheTrueVal;
276 ConstantInt* ConstantInt::getFalse(LLVMContext &Context) {
277 LLVMContextImpl *pImpl = Context.pImpl;
278 if (!pImpl->TheFalseVal)
279 pImpl->TheFalseVal = ConstantInt::get(Type::getInt1Ty(Context), 0);
280 return pImpl->TheFalseVal;
284 // Get a ConstantInt from an APInt. Note that the value stored in the DenseMap
285 // as the key, is a DenseMapAPIntKeyInfo::KeyTy which has provided the
286 // operator== and operator!= to ensure that the DenseMap doesn't attempt to
287 // compare APInt's of different widths, which would violate an APInt class
288 // invariant which generates an assertion.
289 ConstantInt *ConstantInt::get(LLVMContext &Context, const APInt& V) {
290 // Get the corresponding integer type for the bit width of the value.
291 const IntegerType *ITy = IntegerType::get(Context, V.getBitWidth());
292 // get an existing value or the insertion position
293 DenseMapAPIntKeyInfo::KeyTy Key(V, ITy);
294 ConstantInt *&Slot = Context.pImpl->IntConstants[Key];
295 if (!Slot) Slot = new ConstantInt(ITy, V);
299 Constant *ConstantInt::get(const Type* Ty, uint64_t V, bool isSigned) {
300 Constant *C = get(cast<IntegerType>(Ty->getScalarType()),
303 // For vectors, broadcast the value.
304 if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
305 return ConstantVector::get(
306 std::vector<Constant *>(VTy->getNumElements(), C));
311 ConstantInt* ConstantInt::get(const IntegerType* Ty, uint64_t V,
313 return get(Ty->getContext(), APInt(Ty->getBitWidth(), V, isSigned));
316 ConstantInt* ConstantInt::getSigned(const IntegerType* Ty, int64_t V) {
317 return get(Ty, V, true);
320 Constant *ConstantInt::getSigned(const Type *Ty, int64_t V) {
321 return get(Ty, V, true);
324 Constant *ConstantInt::get(const Type* Ty, const APInt& V) {
325 ConstantInt *C = get(Ty->getContext(), V);
326 assert(C->getType() == Ty->getScalarType() &&
327 "ConstantInt type doesn't match the type implied by its value!");
329 // For vectors, broadcast the value.
330 if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
331 return ConstantVector::get(
332 std::vector<Constant *>(VTy->getNumElements(), C));
337 ConstantInt* ConstantInt::get(const IntegerType* Ty, StringRef Str,
339 return get(Ty->getContext(), APInt(Ty->getBitWidth(), Str, radix));
342 //===----------------------------------------------------------------------===//
344 //===----------------------------------------------------------------------===//
346 static const fltSemantics *TypeToFloatSemantics(const Type *Ty) {
348 return &APFloat::IEEEsingle;
349 if (Ty->isDoubleTy())
350 return &APFloat::IEEEdouble;
351 if (Ty->isX86_FP80Ty())
352 return &APFloat::x87DoubleExtended;
353 else if (Ty->isFP128Ty())
354 return &APFloat::IEEEquad;
356 assert(Ty->isPPC_FP128Ty() && "Unknown FP format");
357 return &APFloat::PPCDoubleDouble;
360 /// get() - This returns a constant fp for the specified value in the
361 /// specified type. This should only be used for simple constant values like
362 /// 2.0/1.0 etc, that are known-valid both as double and as the target format.
363 Constant *ConstantFP::get(const Type* Ty, double V) {
364 LLVMContext &Context = Ty->getContext();
368 FV.convert(*TypeToFloatSemantics(Ty->getScalarType()),
369 APFloat::rmNearestTiesToEven, &ignored);
370 Constant *C = get(Context, FV);
372 // For vectors, broadcast the value.
373 if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
374 return ConstantVector::get(
375 std::vector<Constant *>(VTy->getNumElements(), C));
381 Constant *ConstantFP::get(const Type* Ty, StringRef Str) {
382 LLVMContext &Context = Ty->getContext();
384 APFloat FV(*TypeToFloatSemantics(Ty->getScalarType()), Str);
385 Constant *C = get(Context, FV);
387 // For vectors, broadcast the value.
388 if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
389 return ConstantVector::get(
390 std::vector<Constant *>(VTy->getNumElements(), C));
396 ConstantFP* ConstantFP::getNegativeZero(const Type* Ty) {
397 LLVMContext &Context = Ty->getContext();
398 APFloat apf = cast <ConstantFP>(Constant::getNullValue(Ty))->getValueAPF();
400 return get(Context, apf);
404 Constant *ConstantFP::getZeroValueForNegation(const Type* Ty) {
405 if (const VectorType *PTy = dyn_cast<VectorType>(Ty))
406 if (PTy->getElementType()->isFloatingPointTy()) {
407 std::vector<Constant*> zeros(PTy->getNumElements(),
408 getNegativeZero(PTy->getElementType()));
409 return ConstantVector::get(PTy, zeros);
412 if (Ty->isFloatingPointTy())
413 return getNegativeZero(Ty);
415 return Constant::getNullValue(Ty);
419 // ConstantFP accessors.
420 ConstantFP* ConstantFP::get(LLVMContext &Context, const APFloat& V) {
421 DenseMapAPFloatKeyInfo::KeyTy Key(V);
423 LLVMContextImpl* pImpl = Context.pImpl;
425 ConstantFP *&Slot = pImpl->FPConstants[Key];
429 if (&V.getSemantics() == &APFloat::IEEEsingle)
430 Ty = Type::getFloatTy(Context);
431 else if (&V.getSemantics() == &APFloat::IEEEdouble)
432 Ty = Type::getDoubleTy(Context);
433 else if (&V.getSemantics() == &APFloat::x87DoubleExtended)
434 Ty = Type::getX86_FP80Ty(Context);
435 else if (&V.getSemantics() == &APFloat::IEEEquad)
436 Ty = Type::getFP128Ty(Context);
438 assert(&V.getSemantics() == &APFloat::PPCDoubleDouble &&
439 "Unknown FP format");
440 Ty = Type::getPPC_FP128Ty(Context);
442 Slot = new ConstantFP(Ty, V);
448 ConstantFP *ConstantFP::getInfinity(const Type *Ty, bool Negative) {
449 const fltSemantics &Semantics = *TypeToFloatSemantics(Ty);
450 return ConstantFP::get(Ty->getContext(),
451 APFloat::getInf(Semantics, Negative));
454 ConstantFP::ConstantFP(const Type *Ty, const APFloat& V)
455 : Constant(Ty, ConstantFPVal, 0, 0), Val(V) {
456 assert(&V.getSemantics() == TypeToFloatSemantics(Ty) &&
460 bool ConstantFP::isNullValue() const {
461 return Val.isZero() && !Val.isNegative();
464 bool ConstantFP::isExactlyValue(const APFloat& V) const {
465 return Val.bitwiseIsEqual(V);
468 //===----------------------------------------------------------------------===//
469 // ConstantXXX Classes
470 //===----------------------------------------------------------------------===//
473 ConstantArray::ConstantArray(const ArrayType *T,
474 const std::vector<Constant*> &V)
475 : Constant(T, ConstantArrayVal,
476 OperandTraits<ConstantArray>::op_end(this) - V.size(),
478 assert(V.size() == T->getNumElements() &&
479 "Invalid initializer vector for constant array");
480 Use *OL = OperandList;
481 for (std::vector<Constant*>::const_iterator I = V.begin(), E = V.end();
484 assert(C->getType() == T->getElementType() &&
485 "Initializer for array element doesn't match array element type!");
490 Constant *ConstantArray::get(const ArrayType *Ty,
491 const std::vector<Constant*> &V) {
492 for (unsigned i = 0, e = V.size(); i != e; ++i) {
493 assert(V[i]->getType() == Ty->getElementType() &&
494 "Wrong type in array element initializer");
496 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
497 // If this is an all-zero array, return a ConstantAggregateZero object
500 if (!C->isNullValue())
501 return pImpl->ArrayConstants.getOrCreate(Ty, V);
503 for (unsigned i = 1, e = V.size(); i != e; ++i)
505 return pImpl->ArrayConstants.getOrCreate(Ty, V);
508 return ConstantAggregateZero::get(Ty);
512 Constant *ConstantArray::get(const ArrayType* T, Constant *const* Vals,
514 // FIXME: make this the primary ctor method.
515 return get(T, std::vector<Constant*>(Vals, Vals+NumVals));
518 /// ConstantArray::get(const string&) - Return an array that is initialized to
519 /// contain the specified string. If length is zero then a null terminator is
520 /// added to the specified string so that it may be used in a natural way.
521 /// Otherwise, the length parameter specifies how much of the string to use
522 /// and it won't be null terminated.
524 Constant *ConstantArray::get(LLVMContext &Context, StringRef Str,
526 std::vector<Constant*> ElementVals;
527 ElementVals.reserve(Str.size() + size_t(AddNull));
528 for (unsigned i = 0; i < Str.size(); ++i)
529 ElementVals.push_back(ConstantInt::get(Type::getInt8Ty(Context), Str[i]));
531 // Add a null terminator to the string...
533 ElementVals.push_back(ConstantInt::get(Type::getInt8Ty(Context), 0));
536 ArrayType *ATy = ArrayType::get(Type::getInt8Ty(Context), ElementVals.size());
537 return get(ATy, ElementVals);
542 ConstantStruct::ConstantStruct(const StructType *T,
543 const std::vector<Constant*> &V)
544 : Constant(T, ConstantStructVal,
545 OperandTraits<ConstantStruct>::op_end(this) - V.size(),
547 assert(V.size() == T->getNumElements() &&
548 "Invalid initializer vector for constant structure");
549 Use *OL = OperandList;
550 for (std::vector<Constant*>::const_iterator I = V.begin(), E = V.end();
553 assert(C->getType() == T->getElementType(I-V.begin()) &&
554 "Initializer for struct element doesn't match struct element type!");
559 // ConstantStruct accessors.
560 Constant *ConstantStruct::get(const StructType* T,
561 const std::vector<Constant*>& V) {
562 LLVMContextImpl* pImpl = T->getContext().pImpl;
564 // Create a ConstantAggregateZero value if all elements are zeros...
565 for (unsigned i = 0, e = V.size(); i != e; ++i)
566 if (!V[i]->isNullValue())
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() &&
598 "Initializer for vector element doesn't match vector element type!");
603 // ConstantVector accessors.
604 Constant *ConstantVector::get(const VectorType* T,
605 const std::vector<Constant*>& V) {
606 assert(!V.empty() && "Vectors can't be empty");
607 LLVMContext &Context = T->getContext();
608 LLVMContextImpl *pImpl = Context.pImpl;
610 // If this is an all-undef or alll-zero vector, return a
611 // ConstantAggregateZero or UndefValue.
613 bool isZero = C->isNullValue();
614 bool isUndef = isa<UndefValue>(C);
616 if (isZero || isUndef) {
617 for (unsigned i = 1, e = V.size(); i != e; ++i)
619 isZero = isUndef = false;
625 return ConstantAggregateZero::get(T);
627 return UndefValue::get(T);
629 return pImpl->VectorConstants.getOrCreate(T, V);
632 Constant *ConstantVector::get(const std::vector<Constant*>& V) {
633 assert(!V.empty() && "Cannot infer type if V is empty");
634 return get(VectorType::get(V.front()->getType(),V.size()), V);
637 Constant *ConstantVector::get(Constant *const* Vals, unsigned NumVals) {
638 // FIXME: make this the primary ctor method.
639 return get(std::vector<Constant*>(Vals, Vals+NumVals));
642 Constant *ConstantExpr::getNSWNeg(Constant *C) {
643 assert(C->getType()->isIntOrIntVectorTy() &&
644 "Cannot NEG a nonintegral value!");
645 return getNSWSub(ConstantFP::getZeroValueForNegation(C->getType()), C);
648 Constant *ConstantExpr::getNUWNeg(Constant *C) {
649 assert(C->getType()->isIntOrIntVectorTy() &&
650 "Cannot NEG a nonintegral value!");
651 return getNUWSub(ConstantFP::getZeroValueForNegation(C->getType()), C);
654 Constant *ConstantExpr::getNSWAdd(Constant *C1, Constant *C2) {
655 return getTy(C1->getType(), Instruction::Add, C1, C2,
656 OverflowingBinaryOperator::NoSignedWrap);
659 Constant *ConstantExpr::getNUWAdd(Constant *C1, Constant *C2) {
660 return getTy(C1->getType(), Instruction::Add, C1, C2,
661 OverflowingBinaryOperator::NoUnsignedWrap);
664 Constant *ConstantExpr::getNSWSub(Constant *C1, Constant *C2) {
665 return getTy(C1->getType(), Instruction::Sub, C1, C2,
666 OverflowingBinaryOperator::NoSignedWrap);
669 Constant *ConstantExpr::getNUWSub(Constant *C1, Constant *C2) {
670 return getTy(C1->getType(), Instruction::Sub, C1, C2,
671 OverflowingBinaryOperator::NoUnsignedWrap);
674 Constant *ConstantExpr::getNSWMul(Constant *C1, Constant *C2) {
675 return getTy(C1->getType(), Instruction::Mul, C1, C2,
676 OverflowingBinaryOperator::NoSignedWrap);
679 Constant *ConstantExpr::getNUWMul(Constant *C1, Constant *C2) {
680 return getTy(C1->getType(), Instruction::Mul, C1, C2,
681 OverflowingBinaryOperator::NoUnsignedWrap);
684 Constant *ConstantExpr::getNSWShl(Constant *C1, Constant *C2) {
685 return getTy(C1->getType(), Instruction::Shl, C1, C2,
686 OverflowingBinaryOperator::NoSignedWrap);
689 Constant *ConstantExpr::getNUWShl(Constant *C1, Constant *C2) {
690 return getTy(C1->getType(), Instruction::Shl, C1, C2,
691 OverflowingBinaryOperator::NoUnsignedWrap);
694 // Utility function for determining if a ConstantExpr is a CastOp or not. This
695 // can't be inline because we don't want to #include Instruction.h into
697 bool ConstantExpr::isCast() const {
698 return Instruction::isCast(getOpcode());
701 bool ConstantExpr::isCompare() const {
702 return getOpcode() == Instruction::ICmp || getOpcode() == Instruction::FCmp;
705 bool ConstantExpr::isGEPWithNoNotionalOverIndexing() const {
706 if (getOpcode() != Instruction::GetElementPtr) return false;
708 gep_type_iterator GEPI = gep_type_begin(this), E = gep_type_end(this);
709 User::const_op_iterator OI = llvm::next(this->op_begin());
711 // Skip the first index, as it has no static limit.
715 // The remaining indices must be compile-time known integers within the
716 // bounds of the corresponding notional static array types.
717 for (; GEPI != E; ++GEPI, ++OI) {
718 ConstantInt *CI = dyn_cast<ConstantInt>(*OI);
719 if (!CI) return false;
720 if (const ArrayType *ATy = dyn_cast<ArrayType>(*GEPI))
721 if (CI->getValue().getActiveBits() > 64 ||
722 CI->getZExtValue() >= ATy->getNumElements())
726 // All the indices checked out.
730 bool ConstantExpr::hasIndices() const {
731 return getOpcode() == Instruction::ExtractValue ||
732 getOpcode() == Instruction::InsertValue;
735 const SmallVector<unsigned, 4> &ConstantExpr::getIndices() const {
736 if (const ExtractValueConstantExpr *EVCE =
737 dyn_cast<ExtractValueConstantExpr>(this))
738 return EVCE->Indices;
740 return cast<InsertValueConstantExpr>(this)->Indices;
743 unsigned ConstantExpr::getPredicate() const {
744 assert(getOpcode() == Instruction::FCmp ||
745 getOpcode() == Instruction::ICmp);
746 return ((const CompareConstantExpr*)this)->predicate;
749 /// getWithOperandReplaced - Return a constant expression identical to this
750 /// one, but with the specified operand set to the specified value.
752 ConstantExpr::getWithOperandReplaced(unsigned OpNo, Constant *Op) const {
753 assert(OpNo < getNumOperands() && "Operand num is out of range!");
754 assert(Op->getType() == getOperand(OpNo)->getType() &&
755 "Replacing operand with value of different type!");
756 if (getOperand(OpNo) == Op)
757 return const_cast<ConstantExpr*>(this);
759 Constant *Op0, *Op1, *Op2;
760 switch (getOpcode()) {
761 case Instruction::Trunc:
762 case Instruction::ZExt:
763 case Instruction::SExt:
764 case Instruction::FPTrunc:
765 case Instruction::FPExt:
766 case Instruction::UIToFP:
767 case Instruction::SIToFP:
768 case Instruction::FPToUI:
769 case Instruction::FPToSI:
770 case Instruction::PtrToInt:
771 case Instruction::IntToPtr:
772 case Instruction::BitCast:
773 return ConstantExpr::getCast(getOpcode(), Op, getType());
774 case Instruction::Select:
775 Op0 = (OpNo == 0) ? Op : getOperand(0);
776 Op1 = (OpNo == 1) ? Op : getOperand(1);
777 Op2 = (OpNo == 2) ? Op : getOperand(2);
778 return ConstantExpr::getSelect(Op0, Op1, Op2);
779 case Instruction::InsertElement:
780 Op0 = (OpNo == 0) ? Op : getOperand(0);
781 Op1 = (OpNo == 1) ? Op : getOperand(1);
782 Op2 = (OpNo == 2) ? Op : getOperand(2);
783 return ConstantExpr::getInsertElement(Op0, Op1, Op2);
784 case Instruction::ExtractElement:
785 Op0 = (OpNo == 0) ? Op : getOperand(0);
786 Op1 = (OpNo == 1) ? Op : getOperand(1);
787 return ConstantExpr::getExtractElement(Op0, Op1);
788 case Instruction::ShuffleVector:
789 Op0 = (OpNo == 0) ? Op : getOperand(0);
790 Op1 = (OpNo == 1) ? Op : getOperand(1);
791 Op2 = (OpNo == 2) ? Op : getOperand(2);
792 return ConstantExpr::getShuffleVector(Op0, Op1, Op2);
793 case Instruction::GetElementPtr: {
794 SmallVector<Constant*, 8> Ops;
795 Ops.resize(getNumOperands()-1);
796 for (unsigned i = 1, e = getNumOperands(); i != e; ++i)
797 Ops[i-1] = getOperand(i);
799 return cast<GEPOperator>(this)->isInBounds() ?
800 ConstantExpr::getInBoundsGetElementPtr(Op, &Ops[0], Ops.size()) :
801 ConstantExpr::getGetElementPtr(Op, &Ops[0], Ops.size());
803 return cast<GEPOperator>(this)->isInBounds() ?
804 ConstantExpr::getInBoundsGetElementPtr(getOperand(0), &Ops[0],Ops.size()):
805 ConstantExpr::getGetElementPtr(getOperand(0), &Ops[0], Ops.size());
808 assert(getNumOperands() == 2 && "Must be binary operator?");
809 Op0 = (OpNo == 0) ? Op : getOperand(0);
810 Op1 = (OpNo == 1) ? Op : getOperand(1);
811 return ConstantExpr::get(getOpcode(), Op0, Op1, SubclassOptionalData);
815 /// getWithOperands - This returns the current constant expression with the
816 /// operands replaced with the specified values. The specified operands must
817 /// match count and type with the existing ones.
818 Constant *ConstantExpr::
819 getWithOperands(Constant *const *Ops, unsigned NumOps) const {
820 assert(NumOps == getNumOperands() && "Operand count mismatch!");
821 bool AnyChange = false;
822 for (unsigned i = 0; i != NumOps; ++i) {
823 assert(Ops[i]->getType() == getOperand(i)->getType() &&
824 "Operand type mismatch!");
825 AnyChange |= Ops[i] != getOperand(i);
827 if (!AnyChange) // No operands changed, return self.
828 return const_cast<ConstantExpr*>(this);
830 switch (getOpcode()) {
831 case Instruction::Trunc:
832 case Instruction::ZExt:
833 case Instruction::SExt:
834 case Instruction::FPTrunc:
835 case Instruction::FPExt:
836 case Instruction::UIToFP:
837 case Instruction::SIToFP:
838 case Instruction::FPToUI:
839 case Instruction::FPToSI:
840 case Instruction::PtrToInt:
841 case Instruction::IntToPtr:
842 case Instruction::BitCast:
843 return ConstantExpr::getCast(getOpcode(), Ops[0], getType());
844 case Instruction::Select:
845 return ConstantExpr::getSelect(Ops[0], Ops[1], Ops[2]);
846 case Instruction::InsertElement:
847 return ConstantExpr::getInsertElement(Ops[0], Ops[1], Ops[2]);
848 case Instruction::ExtractElement:
849 return ConstantExpr::getExtractElement(Ops[0], Ops[1]);
850 case Instruction::ShuffleVector:
851 return ConstantExpr::getShuffleVector(Ops[0], Ops[1], Ops[2]);
852 case Instruction::GetElementPtr:
853 return cast<GEPOperator>(this)->isInBounds() ?
854 ConstantExpr::getInBoundsGetElementPtr(Ops[0], &Ops[1], NumOps-1) :
855 ConstantExpr::getGetElementPtr(Ops[0], &Ops[1], NumOps-1);
856 case Instruction::ICmp:
857 case Instruction::FCmp:
858 return ConstantExpr::getCompare(getPredicate(), Ops[0], Ops[1]);
860 assert(getNumOperands() == 2 && "Must be binary operator?");
861 return ConstantExpr::get(getOpcode(), Ops[0], Ops[1], SubclassOptionalData);
866 //===----------------------------------------------------------------------===//
867 // isValueValidForType implementations
869 bool ConstantInt::isValueValidForType(const Type *Ty, uint64_t Val) {
870 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth(); // assert okay
871 if (Ty == Type::getInt1Ty(Ty->getContext()))
872 return Val == 0 || Val == 1;
874 return true; // always true, has to fit in largest type
875 uint64_t Max = (1ll << NumBits) - 1;
879 bool ConstantInt::isValueValidForType(const Type *Ty, int64_t Val) {
880 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth(); // assert okay
881 if (Ty == Type::getInt1Ty(Ty->getContext()))
882 return Val == 0 || Val == 1 || Val == -1;
884 return true; // always true, has to fit in largest type
885 int64_t Min = -(1ll << (NumBits-1));
886 int64_t Max = (1ll << (NumBits-1)) - 1;
887 return (Val >= Min && Val <= Max);
890 bool ConstantFP::isValueValidForType(const Type *Ty, const APFloat& Val) {
891 // convert modifies in place, so make a copy.
892 APFloat Val2 = APFloat(Val);
894 switch (Ty->getTypeID()) {
896 return false; // These can't be represented as floating point!
898 // FIXME rounding mode needs to be more flexible
899 case Type::FloatTyID: {
900 if (&Val2.getSemantics() == &APFloat::IEEEsingle)
902 Val2.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, &losesInfo);
905 case Type::DoubleTyID: {
906 if (&Val2.getSemantics() == &APFloat::IEEEsingle ||
907 &Val2.getSemantics() == &APFloat::IEEEdouble)
909 Val2.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &losesInfo);
912 case Type::X86_FP80TyID:
913 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
914 &Val2.getSemantics() == &APFloat::IEEEdouble ||
915 &Val2.getSemantics() == &APFloat::x87DoubleExtended;
916 case Type::FP128TyID:
917 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
918 &Val2.getSemantics() == &APFloat::IEEEdouble ||
919 &Val2.getSemantics() == &APFloat::IEEEquad;
920 case Type::PPC_FP128TyID:
921 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
922 &Val2.getSemantics() == &APFloat::IEEEdouble ||
923 &Val2.getSemantics() == &APFloat::PPCDoubleDouble;
927 //===----------------------------------------------------------------------===//
928 // Factory Function Implementation
930 ConstantAggregateZero* ConstantAggregateZero::get(const Type* Ty) {
931 assert((Ty->isStructTy() || Ty->isArrayTy() || Ty->isVectorTy()) &&
932 "Cannot create an aggregate zero of non-aggregate type!");
934 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
935 return pImpl->AggZeroConstants.getOrCreate(Ty, 0);
938 /// destroyConstant - Remove the constant from the constant table...
940 void ConstantAggregateZero::destroyConstant() {
941 getRawType()->getContext().pImpl->AggZeroConstants.remove(this);
942 destroyConstantImpl();
945 /// destroyConstant - Remove the constant from the constant table...
947 void ConstantArray::destroyConstant() {
948 getRawType()->getContext().pImpl->ArrayConstants.remove(this);
949 destroyConstantImpl();
952 /// isString - This method returns true if the array is an array of i8, and
953 /// if the elements of the array are all ConstantInt's.
954 bool ConstantArray::isString() const {
955 // Check the element type for i8...
956 if (!getType()->getElementType()->isIntegerTy(8))
958 // Check the elements to make sure they are all integers, not constant
960 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
961 if (!isa<ConstantInt>(getOperand(i)))
966 /// isCString - This method returns true if the array is a string (see
967 /// isString) and it ends in a null byte \\0 and does not contains any other
968 /// null bytes except its terminator.
969 bool ConstantArray::isCString() const {
970 // Check the element type for i8...
971 if (!getType()->getElementType()->isIntegerTy(8))
974 // Last element must be a null.
975 if (!getOperand(getNumOperands()-1)->isNullValue())
977 // Other elements must be non-null integers.
978 for (unsigned i = 0, e = getNumOperands()-1; i != e; ++i) {
979 if (!isa<ConstantInt>(getOperand(i)))
981 if (getOperand(i)->isNullValue())
988 /// getAsString - If the sub-element type of this array is i8
989 /// then this method converts the array to an std::string and returns it.
990 /// Otherwise, it asserts out.
992 std::string ConstantArray::getAsString() const {
993 assert(isString() && "Not a string!");
995 Result.reserve(getNumOperands());
996 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
997 Result.push_back((char)cast<ConstantInt>(getOperand(i))->getZExtValue());
1002 //---- ConstantStruct::get() implementation...
1009 // destroyConstant - Remove the constant from the constant table...
1011 void ConstantStruct::destroyConstant() {
1012 getRawType()->getContext().pImpl->StructConstants.remove(this);
1013 destroyConstantImpl();
1016 // destroyConstant - Remove the constant from the constant table...
1018 void ConstantVector::destroyConstant() {
1019 getRawType()->getContext().pImpl->VectorConstants.remove(this);
1020 destroyConstantImpl();
1023 /// This function will return true iff every element in this vector constant
1024 /// is set to all ones.
1025 /// @returns true iff this constant's emements are all set to all ones.
1026 /// @brief Determine if the value is all ones.
1027 bool ConstantVector::isAllOnesValue() const {
1028 // Check out first element.
1029 const Constant *Elt = getOperand(0);
1030 const ConstantInt *CI = dyn_cast<ConstantInt>(Elt);
1031 if (!CI || !CI->isAllOnesValue()) return false;
1032 // Then make sure all remaining elements point to the same value.
1033 for (unsigned I = 1, E = getNumOperands(); I < E; ++I) {
1034 if (getOperand(I) != Elt) return false;
1039 /// getSplatValue - If this is a splat constant, where all of the
1040 /// elements have the same value, return that value. Otherwise return null.
1041 Constant *ConstantVector::getSplatValue() const {
1042 // Check out first element.
1043 Constant *Elt = getOperand(0);
1044 // Then make sure all remaining elements point to the same value.
1045 for (unsigned I = 1, E = getNumOperands(); I < E; ++I)
1046 if (getOperand(I) != Elt) return 0;
1050 //---- ConstantPointerNull::get() implementation.
1053 ConstantPointerNull *ConstantPointerNull::get(const PointerType *Ty) {
1054 return Ty->getContext().pImpl->NullPtrConstants.getOrCreate(Ty, 0);
1057 // destroyConstant - Remove the constant from the constant table...
1059 void ConstantPointerNull::destroyConstant() {
1060 getRawType()->getContext().pImpl->NullPtrConstants.remove(this);
1061 destroyConstantImpl();
1065 //---- UndefValue::get() implementation.
1068 UndefValue *UndefValue::get(const Type *Ty) {
1069 return Ty->getContext().pImpl->UndefValueConstants.getOrCreate(Ty, 0);
1072 // destroyConstant - Remove the constant from the constant table.
1074 void UndefValue::destroyConstant() {
1075 getRawType()->getContext().pImpl->UndefValueConstants.remove(this);
1076 destroyConstantImpl();
1079 //---- BlockAddress::get() implementation.
1082 BlockAddress *BlockAddress::get(BasicBlock *BB) {
1083 assert(BB->getParent() != 0 && "Block must have a parent");
1084 return get(BB->getParent(), BB);
1087 BlockAddress *BlockAddress::get(Function *F, BasicBlock *BB) {
1089 F->getContext().pImpl->BlockAddresses[std::make_pair(F, BB)];
1091 BA = new BlockAddress(F, BB);
1093 assert(BA->getFunction() == F && "Basic block moved between functions");
1097 BlockAddress::BlockAddress(Function *F, BasicBlock *BB)
1098 : Constant(Type::getInt8PtrTy(F->getContext()), Value::BlockAddressVal,
1102 BB->AdjustBlockAddressRefCount(1);
1106 // destroyConstant - Remove the constant from the constant table.
1108 void BlockAddress::destroyConstant() {
1109 getFunction()->getRawType()->getContext().pImpl
1110 ->BlockAddresses.erase(std::make_pair(getFunction(), getBasicBlock()));
1111 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1112 destroyConstantImpl();
1115 void BlockAddress::replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) {
1116 // This could be replacing either the Basic Block or the Function. In either
1117 // case, we have to remove the map entry.
1118 Function *NewF = getFunction();
1119 BasicBlock *NewBB = getBasicBlock();
1122 NewF = cast<Function>(To);
1124 NewBB = cast<BasicBlock>(To);
1126 // See if the 'new' entry already exists, if not, just update this in place
1127 // and return early.
1128 BlockAddress *&NewBA =
1129 getContext().pImpl->BlockAddresses[std::make_pair(NewF, NewBB)];
1131 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1133 // Remove the old entry, this can't cause the map to rehash (just a
1134 // tombstone will get added).
1135 getContext().pImpl->BlockAddresses.erase(std::make_pair(getFunction(),
1138 setOperand(0, NewF);
1139 setOperand(1, NewBB);
1140 getBasicBlock()->AdjustBlockAddressRefCount(1);
1144 // Otherwise, I do need to replace this with an existing value.
1145 assert(NewBA != this && "I didn't contain From!");
1147 // Everyone using this now uses the replacement.
1148 uncheckedReplaceAllUsesWith(NewBA);
1153 //---- ConstantExpr::get() implementations.
1156 /// This is a utility function to handle folding of casts and lookup of the
1157 /// cast in the ExprConstants map. It is used by the various get* methods below.
1158 static inline Constant *getFoldedCast(
1159 Instruction::CastOps opc, Constant *C, const Type *Ty) {
1160 assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
1161 // Fold a few common cases
1162 if (Constant *FC = ConstantFoldCastInstruction(opc, C, Ty))
1165 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
1167 // Look up the constant in the table first to ensure uniqueness
1168 std::vector<Constant*> argVec(1, C);
1169 ExprMapKeyType Key(opc, argVec);
1171 return pImpl->ExprConstants.getOrCreate(Ty, Key);
1174 Constant *ConstantExpr::getCast(unsigned oc, Constant *C, const Type *Ty) {
1175 Instruction::CastOps opc = Instruction::CastOps(oc);
1176 assert(Instruction::isCast(opc) && "opcode out of range");
1177 assert(C && Ty && "Null arguments to getCast");
1178 assert(CastInst::castIsValid(opc, C, Ty) && "Invalid constantexpr cast!");
1182 llvm_unreachable("Invalid cast opcode");
1184 case Instruction::Trunc: return getTrunc(C, Ty);
1185 case Instruction::ZExt: return getZExt(C, Ty);
1186 case Instruction::SExt: return getSExt(C, Ty);
1187 case Instruction::FPTrunc: return getFPTrunc(C, Ty);
1188 case Instruction::FPExt: return getFPExtend(C, Ty);
1189 case Instruction::UIToFP: return getUIToFP(C, Ty);
1190 case Instruction::SIToFP: return getSIToFP(C, Ty);
1191 case Instruction::FPToUI: return getFPToUI(C, Ty);
1192 case Instruction::FPToSI: return getFPToSI(C, Ty);
1193 case Instruction::PtrToInt: return getPtrToInt(C, Ty);
1194 case Instruction::IntToPtr: return getIntToPtr(C, Ty);
1195 case Instruction::BitCast: return getBitCast(C, Ty);
1200 Constant *ConstantExpr::getZExtOrBitCast(Constant *C, const Type *Ty) {
1201 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1202 return getBitCast(C, Ty);
1203 return getZExt(C, Ty);
1206 Constant *ConstantExpr::getSExtOrBitCast(Constant *C, const Type *Ty) {
1207 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1208 return getBitCast(C, Ty);
1209 return getSExt(C, Ty);
1212 Constant *ConstantExpr::getTruncOrBitCast(Constant *C, const Type *Ty) {
1213 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1214 return getBitCast(C, Ty);
1215 return getTrunc(C, Ty);
1218 Constant *ConstantExpr::getPointerCast(Constant *S, const Type *Ty) {
1219 assert(S->getType()->isPointerTy() && "Invalid cast");
1220 assert((Ty->isIntegerTy() || Ty->isPointerTy()) && "Invalid cast");
1222 if (Ty->isIntegerTy())
1223 return getPtrToInt(S, Ty);
1224 return getBitCast(S, Ty);
1227 Constant *ConstantExpr::getIntegerCast(Constant *C, const Type *Ty,
1229 assert(C->getType()->isIntOrIntVectorTy() &&
1230 Ty->isIntOrIntVectorTy() && "Invalid cast");
1231 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1232 unsigned DstBits = Ty->getScalarSizeInBits();
1233 Instruction::CastOps opcode =
1234 (SrcBits == DstBits ? Instruction::BitCast :
1235 (SrcBits > DstBits ? Instruction::Trunc :
1236 (isSigned ? Instruction::SExt : Instruction::ZExt)));
1237 return getCast(opcode, C, Ty);
1240 Constant *ConstantExpr::getFPCast(Constant *C, const Type *Ty) {
1241 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1243 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1244 unsigned DstBits = Ty->getScalarSizeInBits();
1245 if (SrcBits == DstBits)
1246 return C; // Avoid a useless cast
1247 Instruction::CastOps opcode =
1248 (SrcBits > DstBits ? Instruction::FPTrunc : Instruction::FPExt);
1249 return getCast(opcode, C, Ty);
1252 Constant *ConstantExpr::getTrunc(Constant *C, const Type *Ty) {
1254 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1255 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1257 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1258 assert(C->getType()->isIntOrIntVectorTy() && "Trunc operand must be integer");
1259 assert(Ty->isIntOrIntVectorTy() && "Trunc produces only integral");
1260 assert(C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1261 "SrcTy must be larger than DestTy for Trunc!");
1263 return getFoldedCast(Instruction::Trunc, C, Ty);
1266 Constant *ConstantExpr::getSExt(Constant *C, const Type *Ty) {
1268 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1269 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1271 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1272 assert(C->getType()->isIntOrIntVectorTy() && "SExt operand must be integral");
1273 assert(Ty->isIntOrIntVectorTy() && "SExt produces only integer");
1274 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1275 "SrcTy must be smaller than DestTy for SExt!");
1277 return getFoldedCast(Instruction::SExt, C, Ty);
1280 Constant *ConstantExpr::getZExt(Constant *C, const Type *Ty) {
1282 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1283 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1285 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1286 assert(C->getType()->isIntOrIntVectorTy() && "ZEXt operand must be integral");
1287 assert(Ty->isIntOrIntVectorTy() && "ZExt produces only integer");
1288 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1289 "SrcTy must be smaller than DestTy for ZExt!");
1291 return getFoldedCast(Instruction::ZExt, C, Ty);
1294 Constant *ConstantExpr::getFPTrunc(Constant *C, const Type *Ty) {
1296 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1297 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1299 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1300 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1301 C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1302 "This is an illegal floating point truncation!");
1303 return getFoldedCast(Instruction::FPTrunc, C, Ty);
1306 Constant *ConstantExpr::getFPExtend(Constant *C, const Type *Ty) {
1308 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1309 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1311 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1312 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1313 C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1314 "This is an illegal floating point extension!");
1315 return getFoldedCast(Instruction::FPExt, C, Ty);
1318 Constant *ConstantExpr::getUIToFP(Constant *C, const Type *Ty) {
1320 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1321 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1323 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1324 assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1325 "This is an illegal uint to floating point cast!");
1326 return getFoldedCast(Instruction::UIToFP, C, Ty);
1329 Constant *ConstantExpr::getSIToFP(Constant *C, const Type *Ty) {
1331 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1332 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1334 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1335 assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1336 "This is an illegal sint to floating point cast!");
1337 return getFoldedCast(Instruction::SIToFP, C, Ty);
1340 Constant *ConstantExpr::getFPToUI(Constant *C, const Type *Ty) {
1342 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1343 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1345 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1346 assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1347 "This is an illegal floating point to uint cast!");
1348 return getFoldedCast(Instruction::FPToUI, C, Ty);
1351 Constant *ConstantExpr::getFPToSI(Constant *C, const Type *Ty) {
1353 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1354 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1356 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1357 assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1358 "This is an illegal floating point to sint cast!");
1359 return getFoldedCast(Instruction::FPToSI, C, Ty);
1362 Constant *ConstantExpr::getPtrToInt(Constant *C, const Type *DstTy) {
1363 assert(C->getType()->isPointerTy() && "PtrToInt source must be pointer");
1364 assert(DstTy->isIntegerTy() && "PtrToInt destination must be integral");
1365 return getFoldedCast(Instruction::PtrToInt, C, DstTy);
1368 Constant *ConstantExpr::getIntToPtr(Constant *C, const Type *DstTy) {
1369 assert(C->getType()->isIntegerTy() && "IntToPtr source must be integral");
1370 assert(DstTy->isPointerTy() && "IntToPtr destination must be a pointer");
1371 return getFoldedCast(Instruction::IntToPtr, C, DstTy);
1374 Constant *ConstantExpr::getBitCast(Constant *C, const Type *DstTy) {
1375 assert(CastInst::castIsValid(Instruction::BitCast, C, DstTy) &&
1376 "Invalid constantexpr bitcast!");
1378 // It is common to ask for a bitcast of a value to its own type, handle this
1380 if (C->getType() == DstTy) return C;
1382 return getFoldedCast(Instruction::BitCast, C, DstTy);
1385 Constant *ConstantExpr::getTy(const Type *ReqTy, unsigned Opcode,
1386 Constant *C1, Constant *C2,
1388 // Check the operands for consistency first
1389 assert(Opcode >= Instruction::BinaryOpsBegin &&
1390 Opcode < Instruction::BinaryOpsEnd &&
1391 "Invalid opcode in binary constant expression");
1392 assert(C1->getType() == C2->getType() &&
1393 "Operand types in binary constant expression should match");
1395 if (ReqTy == C1->getType() || ReqTy == Type::getInt1Ty(ReqTy->getContext()))
1396 if (Constant *FC = ConstantFoldBinaryInstruction(Opcode, C1, C2))
1397 return FC; // Fold a few common cases...
1399 std::vector<Constant*> argVec(1, C1); argVec.push_back(C2);
1400 ExprMapKeyType Key(Opcode, argVec, 0, Flags);
1402 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1403 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1406 Constant *ConstantExpr::getCompareTy(unsigned short predicate,
1407 Constant *C1, Constant *C2) {
1408 switch (predicate) {
1409 default: llvm_unreachable("Invalid CmpInst predicate");
1410 case CmpInst::FCMP_FALSE: case CmpInst::FCMP_OEQ: case CmpInst::FCMP_OGT:
1411 case CmpInst::FCMP_OGE: case CmpInst::FCMP_OLT: case CmpInst::FCMP_OLE:
1412 case CmpInst::FCMP_ONE: case CmpInst::FCMP_ORD: case CmpInst::FCMP_UNO:
1413 case CmpInst::FCMP_UEQ: case CmpInst::FCMP_UGT: case CmpInst::FCMP_UGE:
1414 case CmpInst::FCMP_ULT: case CmpInst::FCMP_ULE: case CmpInst::FCMP_UNE:
1415 case CmpInst::FCMP_TRUE:
1416 return getFCmp(predicate, C1, C2);
1418 case CmpInst::ICMP_EQ: case CmpInst::ICMP_NE: case CmpInst::ICMP_UGT:
1419 case CmpInst::ICMP_UGE: case CmpInst::ICMP_ULT: case CmpInst::ICMP_ULE:
1420 case CmpInst::ICMP_SGT: case CmpInst::ICMP_SGE: case CmpInst::ICMP_SLT:
1421 case CmpInst::ICMP_SLE:
1422 return getICmp(predicate, C1, C2);
1426 Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2,
1430 case Instruction::Add:
1431 case Instruction::Sub:
1432 case Instruction::Mul:
1433 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1434 assert(C1->getType()->isIntOrIntVectorTy() &&
1435 "Tried to create an integer operation on a non-integer type!");
1437 case Instruction::FAdd:
1438 case Instruction::FSub:
1439 case Instruction::FMul:
1440 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1441 assert(C1->getType()->isFPOrFPVectorTy() &&
1442 "Tried to create a floating-point operation on a "
1443 "non-floating-point type!");
1445 case Instruction::UDiv:
1446 case Instruction::SDiv:
1447 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1448 assert(C1->getType()->isIntOrIntVectorTy() &&
1449 "Tried to create an arithmetic operation on a non-arithmetic type!");
1451 case Instruction::FDiv:
1452 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1453 assert(C1->getType()->isFPOrFPVectorTy() &&
1454 "Tried to create an arithmetic operation on a non-arithmetic type!");
1456 case Instruction::URem:
1457 case Instruction::SRem:
1458 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1459 assert(C1->getType()->isIntOrIntVectorTy() &&
1460 "Tried to create an arithmetic operation on a non-arithmetic type!");
1462 case Instruction::FRem:
1463 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1464 assert(C1->getType()->isFPOrFPVectorTy() &&
1465 "Tried to create an arithmetic operation on a non-arithmetic type!");
1467 case Instruction::And:
1468 case Instruction::Or:
1469 case Instruction::Xor:
1470 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1471 assert(C1->getType()->isIntOrIntVectorTy() &&
1472 "Tried to create a logical operation on a non-integral type!");
1474 case Instruction::Shl:
1475 case Instruction::LShr:
1476 case Instruction::AShr:
1477 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1478 assert(C1->getType()->isIntOrIntVectorTy() &&
1479 "Tried to create a shift operation on a non-integer type!");
1486 return getTy(C1->getType(), Opcode, C1, C2, Flags);
1489 Constant *ConstantExpr::getSizeOf(const Type* Ty) {
1490 // sizeof is implemented as: (i64) gep (Ty*)null, 1
1491 // Note that a non-inbounds gep is used, as null isn't within any object.
1492 Constant *GEPIdx = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1493 Constant *GEP = getGetElementPtr(
1494 Constant::getNullValue(PointerType::getUnqual(Ty)), &GEPIdx, 1);
1495 return getPtrToInt(GEP,
1496 Type::getInt64Ty(Ty->getContext()));
1499 Constant *ConstantExpr::getAlignOf(const Type* Ty) {
1500 // alignof is implemented as: (i64) gep ({i1,Ty}*)null, 0, 1
1501 // Note that a non-inbounds gep is used, as null isn't within any object.
1502 const Type *AligningTy = StructType::get(Ty->getContext(),
1503 Type::getInt1Ty(Ty->getContext()), Ty, NULL);
1504 Constant *NullPtr = Constant::getNullValue(AligningTy->getPointerTo());
1505 Constant *Zero = ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0);
1506 Constant *One = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1507 Constant *Indices[2] = { Zero, One };
1508 Constant *GEP = getGetElementPtr(NullPtr, Indices, 2);
1509 return getPtrToInt(GEP,
1510 Type::getInt64Ty(Ty->getContext()));
1513 Constant *ConstantExpr::getOffsetOf(const StructType* STy, unsigned FieldNo) {
1514 return getOffsetOf(STy, ConstantInt::get(Type::getInt32Ty(STy->getContext()),
1518 Constant *ConstantExpr::getOffsetOf(const Type* Ty, Constant *FieldNo) {
1519 // offsetof is implemented as: (i64) gep (Ty*)null, 0, FieldNo
1520 // Note that a non-inbounds gep is used, as null isn't within any object.
1521 Constant *GEPIdx[] = {
1522 ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0),
1525 Constant *GEP = getGetElementPtr(
1526 Constant::getNullValue(PointerType::getUnqual(Ty)), GEPIdx, 2);
1527 return getPtrToInt(GEP,
1528 Type::getInt64Ty(Ty->getContext()));
1531 Constant *ConstantExpr::getCompare(unsigned short pred,
1532 Constant *C1, Constant *C2) {
1533 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1534 return getCompareTy(pred, C1, C2);
1537 Constant *ConstantExpr::getSelectTy(const Type *ReqTy, Constant *C,
1538 Constant *V1, Constant *V2) {
1539 assert(!SelectInst::areInvalidOperands(C, V1, V2)&&"Invalid select operands");
1541 if (ReqTy == V1->getType())
1542 if (Constant *SC = ConstantFoldSelectInstruction(C, V1, V2))
1543 return SC; // Fold common cases
1545 std::vector<Constant*> argVec(3, C);
1548 ExprMapKeyType Key(Instruction::Select, argVec);
1550 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1551 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1554 template<typename IndexTy>
1555 Constant *ConstantExpr::getGetElementPtrTy(const Type *ReqTy, Constant *C,
1556 IndexTy const *Idxs,
1558 assert(GetElementPtrInst::getIndexedType(C->getType(), Idxs,
1560 cast<PointerType>(ReqTy)->getElementType() &&
1561 "GEP indices invalid!");
1563 if (Constant *FC = ConstantFoldGetElementPtr(C, /*inBounds=*/false,
1565 return FC; // Fold a few common cases...
1567 assert(C->getType()->isPointerTy() &&
1568 "Non-pointer type for constant GetElementPtr expression");
1569 // Look up the constant in the table first to ensure uniqueness
1570 std::vector<Constant*> ArgVec;
1571 ArgVec.reserve(NumIdx+1);
1572 ArgVec.push_back(C);
1573 for (unsigned i = 0; i != NumIdx; ++i)
1574 ArgVec.push_back(cast<Constant>(Idxs[i]));
1575 const ExprMapKeyType Key(Instruction::GetElementPtr, ArgVec);
1577 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1578 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1581 template<typename IndexTy>
1582 Constant *ConstantExpr::getInBoundsGetElementPtrTy(const Type *ReqTy,
1584 IndexTy const *Idxs,
1586 assert(GetElementPtrInst::getIndexedType(C->getType(), Idxs,
1588 cast<PointerType>(ReqTy)->getElementType() &&
1589 "GEP indices invalid!");
1591 if (Constant *FC = ConstantFoldGetElementPtr(C, /*inBounds=*/true,
1593 return FC; // Fold a few common cases...
1595 assert(C->getType()->isPointerTy() &&
1596 "Non-pointer type for constant GetElementPtr expression");
1597 // Look up the constant in the table first to ensure uniqueness
1598 std::vector<Constant*> ArgVec;
1599 ArgVec.reserve(NumIdx+1);
1600 ArgVec.push_back(C);
1601 for (unsigned i = 0; i != NumIdx; ++i)
1602 ArgVec.push_back(cast<Constant>(Idxs[i]));
1603 const ExprMapKeyType Key(Instruction::GetElementPtr, ArgVec, 0,
1604 GEPOperator::IsInBounds);
1606 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1607 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1610 template<typename IndexTy>
1611 Constant *ConstantExpr::getGetElementPtrImpl(Constant *C, IndexTy const *Idxs,
1613 // Get the result type of the getelementptr!
1615 GetElementPtrInst::getIndexedType(C->getType(), Idxs, Idxs+NumIdx);
1616 assert(Ty && "GEP indices invalid!");
1617 unsigned As = cast<PointerType>(C->getType())->getAddressSpace();
1618 return getGetElementPtrTy(PointerType::get(Ty, As), C, Idxs, NumIdx);
1621 template<typename IndexTy>
1622 Constant *ConstantExpr::getInBoundsGetElementPtrImpl(Constant *C,
1623 IndexTy const *Idxs,
1625 // Get the result type of the getelementptr!
1627 GetElementPtrInst::getIndexedType(C->getType(), Idxs, Idxs+NumIdx);
1628 assert(Ty && "GEP indices invalid!");
1629 unsigned As = cast<PointerType>(C->getType())->getAddressSpace();
1630 return getInBoundsGetElementPtrTy(PointerType::get(Ty, As), C, Idxs, NumIdx);
1633 Constant *ConstantExpr::getGetElementPtr(Constant *C, Value* const *Idxs,
1635 return getGetElementPtrImpl(C, Idxs, NumIdx);
1638 Constant *ConstantExpr::getGetElementPtr(Constant *C, Constant *const *Idxs,
1640 return getGetElementPtrImpl(C, Idxs, NumIdx);
1643 Constant *ConstantExpr::getInBoundsGetElementPtr(Constant *C,
1646 return getInBoundsGetElementPtrImpl(C, Idxs, NumIdx);
1649 Constant *ConstantExpr::getInBoundsGetElementPtr(Constant *C,
1650 Constant *const *Idxs,
1652 return getInBoundsGetElementPtrImpl(C, Idxs, NumIdx);
1656 ConstantExpr::getICmp(unsigned short pred, Constant *LHS, Constant *RHS) {
1657 assert(LHS->getType() == RHS->getType());
1658 assert(pred >= ICmpInst::FIRST_ICMP_PREDICATE &&
1659 pred <= ICmpInst::LAST_ICMP_PREDICATE && "Invalid ICmp Predicate");
1661 if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
1662 return FC; // Fold a few common cases...
1664 // Look up the constant in the table first to ensure uniqueness
1665 std::vector<Constant*> ArgVec;
1666 ArgVec.push_back(LHS);
1667 ArgVec.push_back(RHS);
1668 // Get the key type with both the opcode and predicate
1669 const ExprMapKeyType Key(Instruction::ICmp, ArgVec, pred);
1671 const Type *ResultTy = Type::getInt1Ty(LHS->getContext());
1672 if (const VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
1673 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
1675 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
1676 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
1680 ConstantExpr::getFCmp(unsigned short pred, Constant *LHS, Constant *RHS) {
1681 assert(LHS->getType() == RHS->getType());
1682 assert(pred <= FCmpInst::LAST_FCMP_PREDICATE && "Invalid FCmp Predicate");
1684 if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
1685 return FC; // Fold a few common cases...
1687 // Look up the constant in the table first to ensure uniqueness
1688 std::vector<Constant*> ArgVec;
1689 ArgVec.push_back(LHS);
1690 ArgVec.push_back(RHS);
1691 // Get the key type with both the opcode and predicate
1692 const ExprMapKeyType Key(Instruction::FCmp, ArgVec, pred);
1694 const Type *ResultTy = Type::getInt1Ty(LHS->getContext());
1695 if (const VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
1696 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
1698 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
1699 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
1702 Constant *ConstantExpr::getExtractElementTy(const Type *ReqTy, Constant *Val,
1704 if (Constant *FC = ConstantFoldExtractElementInstruction(Val, Idx))
1705 return FC; // Fold a few common cases.
1706 // Look up the constant in the table first to ensure uniqueness
1707 std::vector<Constant*> ArgVec(1, Val);
1708 ArgVec.push_back(Idx);
1709 const ExprMapKeyType Key(Instruction::ExtractElement,ArgVec);
1711 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1712 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1715 Constant *ConstantExpr::getExtractElement(Constant *Val, Constant *Idx) {
1716 assert(Val->getType()->isVectorTy() &&
1717 "Tried to create extractelement operation on non-vector type!");
1718 assert(Idx->getType()->isIntegerTy(32) &&
1719 "Extractelement index must be i32 type!");
1720 return getExtractElementTy(cast<VectorType>(Val->getType())->getElementType(),
1724 Constant *ConstantExpr::getInsertElementTy(const Type *ReqTy, Constant *Val,
1725 Constant *Elt, Constant *Idx) {
1726 if (Constant *FC = ConstantFoldInsertElementInstruction(Val, Elt, Idx))
1727 return FC; // Fold a few common cases.
1728 // Look up the constant in the table first to ensure uniqueness
1729 std::vector<Constant*> ArgVec(1, Val);
1730 ArgVec.push_back(Elt);
1731 ArgVec.push_back(Idx);
1732 const ExprMapKeyType Key(Instruction::InsertElement,ArgVec);
1734 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1735 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1738 Constant *ConstantExpr::getInsertElement(Constant *Val, Constant *Elt,
1740 assert(Val->getType()->isVectorTy() &&
1741 "Tried to create insertelement operation on non-vector type!");
1742 assert(Elt->getType() == cast<VectorType>(Val->getType())->getElementType()
1743 && "Insertelement types must match!");
1744 assert(Idx->getType()->isIntegerTy(32) &&
1745 "Insertelement index must be i32 type!");
1746 return getInsertElementTy(Val->getType(), Val, Elt, Idx);
1749 Constant *ConstantExpr::getShuffleVectorTy(const Type *ReqTy, Constant *V1,
1750 Constant *V2, Constant *Mask) {
1751 if (Constant *FC = ConstantFoldShuffleVectorInstruction(V1, V2, Mask))
1752 return FC; // Fold a few common cases...
1753 // Look up the constant in the table first to ensure uniqueness
1754 std::vector<Constant*> ArgVec(1, V1);
1755 ArgVec.push_back(V2);
1756 ArgVec.push_back(Mask);
1757 const ExprMapKeyType Key(Instruction::ShuffleVector,ArgVec);
1759 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1760 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1763 Constant *ConstantExpr::getShuffleVector(Constant *V1, Constant *V2,
1765 assert(ShuffleVectorInst::isValidOperands(V1, V2, Mask) &&
1766 "Invalid shuffle vector constant expr operands!");
1768 unsigned NElts = cast<VectorType>(Mask->getType())->getNumElements();
1769 const Type *EltTy = cast<VectorType>(V1->getType())->getElementType();
1770 const Type *ShufTy = VectorType::get(EltTy, NElts);
1771 return getShuffleVectorTy(ShufTy, V1, V2, Mask);
1774 Constant *ConstantExpr::getInsertValueTy(const Type *ReqTy, Constant *Agg,
1776 const unsigned *Idxs, unsigned NumIdx) {
1777 assert(ExtractValueInst::getIndexedType(Agg->getType(), Idxs,
1778 Idxs+NumIdx) == Val->getType() &&
1779 "insertvalue indices invalid!");
1780 assert(Agg->getType() == ReqTy &&
1781 "insertvalue type invalid!");
1782 assert(Agg->getType()->isFirstClassType() &&
1783 "Non-first-class type for constant InsertValue expression");
1784 Constant *FC = ConstantFoldInsertValueInstruction(Agg, Val, Idxs, NumIdx);
1785 assert(FC && "InsertValue constant expr couldn't be folded!");
1789 Constant *ConstantExpr::getInsertValue(Constant *Agg, Constant *Val,
1790 const unsigned *IdxList, unsigned NumIdx) {
1791 assert(Agg->getType()->isFirstClassType() &&
1792 "Tried to create insertelement operation on non-first-class type!");
1794 const Type *ReqTy = Agg->getType();
1797 ExtractValueInst::getIndexedType(Agg->getType(), IdxList, IdxList+NumIdx);
1799 assert(ValTy == Val->getType() && "insertvalue indices invalid!");
1800 return getInsertValueTy(ReqTy, Agg, Val, IdxList, NumIdx);
1803 Constant *ConstantExpr::getExtractValueTy(const Type *ReqTy, Constant *Agg,
1804 const unsigned *Idxs, unsigned NumIdx) {
1805 assert(ExtractValueInst::getIndexedType(Agg->getType(), Idxs,
1806 Idxs+NumIdx) == ReqTy &&
1807 "extractvalue indices invalid!");
1808 assert(Agg->getType()->isFirstClassType() &&
1809 "Non-first-class type for constant extractvalue expression");
1810 Constant *FC = ConstantFoldExtractValueInstruction(Agg, Idxs, NumIdx);
1811 assert(FC && "ExtractValue constant expr couldn't be folded!");
1815 Constant *ConstantExpr::getExtractValue(Constant *Agg,
1816 const unsigned *IdxList, unsigned NumIdx) {
1817 assert(Agg->getType()->isFirstClassType() &&
1818 "Tried to create extractelement operation on non-first-class type!");
1821 ExtractValueInst::getIndexedType(Agg->getType(), IdxList, IdxList+NumIdx);
1822 assert(ReqTy && "extractvalue indices invalid!");
1823 return getExtractValueTy(ReqTy, Agg, IdxList, NumIdx);
1826 Constant *ConstantExpr::getNeg(Constant *C) {
1827 assert(C->getType()->isIntOrIntVectorTy() &&
1828 "Cannot NEG a nonintegral value!");
1829 return get(Instruction::Sub,
1830 ConstantFP::getZeroValueForNegation(C->getType()),
1834 Constant *ConstantExpr::getFNeg(Constant *C) {
1835 assert(C->getType()->isFPOrFPVectorTy() &&
1836 "Cannot FNEG a non-floating-point value!");
1837 return get(Instruction::FSub,
1838 ConstantFP::getZeroValueForNegation(C->getType()),
1842 Constant *ConstantExpr::getNot(Constant *C) {
1843 assert(C->getType()->isIntOrIntVectorTy() &&
1844 "Cannot NOT a nonintegral value!");
1845 return get(Instruction::Xor, C, Constant::getAllOnesValue(C->getType()));
1848 Constant *ConstantExpr::getAdd(Constant *C1, Constant *C2) {
1849 return get(Instruction::Add, C1, C2);
1852 Constant *ConstantExpr::getFAdd(Constant *C1, Constant *C2) {
1853 return get(Instruction::FAdd, C1, C2);
1856 Constant *ConstantExpr::getSub(Constant *C1, Constant *C2) {
1857 return get(Instruction::Sub, C1, C2);
1860 Constant *ConstantExpr::getFSub(Constant *C1, Constant *C2) {
1861 return get(Instruction::FSub, C1, C2);
1864 Constant *ConstantExpr::getMul(Constant *C1, Constant *C2) {
1865 return get(Instruction::Mul, C1, C2);
1868 Constant *ConstantExpr::getFMul(Constant *C1, Constant *C2) {
1869 return get(Instruction::FMul, C1, C2);
1872 Constant *ConstantExpr::getUDiv(Constant *C1, Constant *C2, bool isExact) {
1873 return get(Instruction::UDiv, C1, C2,
1874 isExact ? PossiblyExactOperator::IsExact : 0);
1877 Constant *ConstantExpr::getSDiv(Constant *C1, Constant *C2, bool isExact) {
1878 return get(Instruction::SDiv, C1, C2,
1879 isExact ? PossiblyExactOperator::IsExact : 0);
1882 Constant *ConstantExpr::getFDiv(Constant *C1, Constant *C2) {
1883 return get(Instruction::FDiv, C1, C2);
1886 Constant *ConstantExpr::getURem(Constant *C1, Constant *C2) {
1887 return get(Instruction::URem, C1, C2);
1890 Constant *ConstantExpr::getSRem(Constant *C1, Constant *C2) {
1891 return get(Instruction::SRem, C1, C2);
1894 Constant *ConstantExpr::getFRem(Constant *C1, Constant *C2) {
1895 return get(Instruction::FRem, C1, C2);
1898 Constant *ConstantExpr::getAnd(Constant *C1, Constant *C2) {
1899 return get(Instruction::And, C1, C2);
1902 Constant *ConstantExpr::getOr(Constant *C1, Constant *C2) {
1903 return get(Instruction::Or, C1, C2);
1906 Constant *ConstantExpr::getXor(Constant *C1, Constant *C2) {
1907 return get(Instruction::Xor, C1, C2);
1910 Constant *ConstantExpr::getShl(Constant *C1, Constant *C2) {
1911 return get(Instruction::Shl, C1, C2);
1914 Constant *ConstantExpr::getLShr(Constant *C1, Constant *C2, bool isExact) {
1915 return get(Instruction::LShr, C1, C2,
1916 isExact ? PossiblyExactOperator::IsExact : 0);
1919 Constant *ConstantExpr::getAShr(Constant *C1, Constant *C2, bool isExact) {
1920 return get(Instruction::AShr, C1, C2,
1921 isExact ? PossiblyExactOperator::IsExact : 0);
1924 // destroyConstant - Remove the constant from the constant table...
1926 void ConstantExpr::destroyConstant() {
1927 getRawType()->getContext().pImpl->ExprConstants.remove(this);
1928 destroyConstantImpl();
1931 const char *ConstantExpr::getOpcodeName() const {
1932 return Instruction::getOpcodeName(getOpcode());
1937 GetElementPtrConstantExpr::
1938 GetElementPtrConstantExpr(Constant *C, const std::vector<Constant*> &IdxList,
1940 : ConstantExpr(DestTy, Instruction::GetElementPtr,
1941 OperandTraits<GetElementPtrConstantExpr>::op_end(this)
1942 - (IdxList.size()+1), IdxList.size()+1) {
1944 for (unsigned i = 0, E = IdxList.size(); i != E; ++i)
1945 OperandList[i+1] = IdxList[i];
1949 //===----------------------------------------------------------------------===//
1950 // replaceUsesOfWithOnConstant implementations
1952 /// replaceUsesOfWithOnConstant - Update this constant array to change uses of
1953 /// 'From' to be uses of 'To'. This must update the uniquing data structures
1956 /// Note that we intentionally replace all uses of From with To here. Consider
1957 /// a large array that uses 'From' 1000 times. By handling this case all here,
1958 /// ConstantArray::replaceUsesOfWithOnConstant is only invoked once, and that
1959 /// single invocation handles all 1000 uses. Handling them one at a time would
1960 /// work, but would be really slow because it would have to unique each updated
1963 void ConstantArray::replaceUsesOfWithOnConstant(Value *From, Value *To,
1965 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
1966 Constant *ToC = cast<Constant>(To);
1968 LLVMContextImpl *pImpl = getRawType()->getContext().pImpl;
1970 std::pair<LLVMContextImpl::ArrayConstantsTy::MapKey, ConstantArray*> Lookup;
1971 Lookup.first.first = cast<ArrayType>(getRawType());
1972 Lookup.second = this;
1974 std::vector<Constant*> &Values = Lookup.first.second;
1975 Values.reserve(getNumOperands()); // Build replacement array.
1977 // Fill values with the modified operands of the constant array. Also,
1978 // compute whether this turns into an all-zeros array.
1979 bool isAllZeros = false;
1980 unsigned NumUpdated = 0;
1981 if (!ToC->isNullValue()) {
1982 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
1983 Constant *Val = cast<Constant>(O->get());
1988 Values.push_back(Val);
1992 for (Use *O = OperandList, *E = OperandList+getNumOperands();O != E; ++O) {
1993 Constant *Val = cast<Constant>(O->get());
1998 Values.push_back(Val);
1999 if (isAllZeros) isAllZeros = Val->isNullValue();
2003 Constant *Replacement = 0;
2005 Replacement = ConstantAggregateZero::get(getRawType());
2007 // Check to see if we have this array type already.
2009 LLVMContextImpl::ArrayConstantsTy::MapTy::iterator I =
2010 pImpl->ArrayConstants.InsertOrGetItem(Lookup, Exists);
2013 Replacement = I->second;
2015 // Okay, the new shape doesn't exist in the system yet. Instead of
2016 // creating a new constant array, inserting it, replaceallusesof'ing the
2017 // old with the new, then deleting the old... just update the current one
2019 pImpl->ArrayConstants.MoveConstantToNewSlot(this, I);
2021 // Update to the new value. Optimize for the case when we have a single
2022 // operand that we're changing, but handle bulk updates efficiently.
2023 if (NumUpdated == 1) {
2024 unsigned OperandToUpdate = U - OperandList;
2025 assert(getOperand(OperandToUpdate) == From &&
2026 "ReplaceAllUsesWith broken!");
2027 setOperand(OperandToUpdate, ToC);
2029 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
2030 if (getOperand(i) == From)
2037 // Otherwise, I do need to replace this with an existing value.
2038 assert(Replacement != this && "I didn't contain From!");
2040 // Everyone using this now uses the replacement.
2041 uncheckedReplaceAllUsesWith(Replacement);
2043 // Delete the old constant!
2047 void ConstantStruct::replaceUsesOfWithOnConstant(Value *From, Value *To,
2049 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2050 Constant *ToC = cast<Constant>(To);
2052 unsigned OperandToUpdate = U-OperandList;
2053 assert(getOperand(OperandToUpdate) == From && "ReplaceAllUsesWith broken!");
2055 std::pair<LLVMContextImpl::StructConstantsTy::MapKey, ConstantStruct*> Lookup;
2056 Lookup.first.first = cast<StructType>(getRawType());
2057 Lookup.second = this;
2058 std::vector<Constant*> &Values = Lookup.first.second;
2059 Values.reserve(getNumOperands()); // Build replacement struct.
2062 // Fill values with the modified operands of the constant struct. Also,
2063 // compute whether this turns into an all-zeros struct.
2064 bool isAllZeros = false;
2065 if (!ToC->isNullValue()) {
2066 for (Use *O = OperandList, *E = OperandList + getNumOperands(); O != E; ++O)
2067 Values.push_back(cast<Constant>(O->get()));
2070 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2071 Constant *Val = cast<Constant>(O->get());
2072 Values.push_back(Val);
2073 if (isAllZeros) isAllZeros = Val->isNullValue();
2076 Values[OperandToUpdate] = ToC;
2078 LLVMContextImpl *pImpl = getRawType()->getContext().pImpl;
2080 Constant *Replacement = 0;
2082 Replacement = ConstantAggregateZero::get(getRawType());
2084 // Check to see if we have this struct type already.
2086 LLVMContextImpl::StructConstantsTy::MapTy::iterator I =
2087 pImpl->StructConstants.InsertOrGetItem(Lookup, Exists);
2090 Replacement = I->second;
2092 // Okay, the new shape doesn't exist in the system yet. Instead of
2093 // creating a new constant struct, inserting it, replaceallusesof'ing the
2094 // old with the new, then deleting the old... just update the current one
2096 pImpl->StructConstants.MoveConstantToNewSlot(this, I);
2098 // Update to the new value.
2099 setOperand(OperandToUpdate, ToC);
2104 assert(Replacement != this && "I didn't contain From!");
2106 // Everyone using this now uses the replacement.
2107 uncheckedReplaceAllUsesWith(Replacement);
2109 // Delete the old constant!
2113 void ConstantVector::replaceUsesOfWithOnConstant(Value *From, Value *To,
2115 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2117 std::vector<Constant*> Values;
2118 Values.reserve(getNumOperands()); // Build replacement array...
2119 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
2120 Constant *Val = getOperand(i);
2121 if (Val == From) Val = cast<Constant>(To);
2122 Values.push_back(Val);
2125 Constant *Replacement = get(cast<VectorType>(getRawType()), Values);
2126 assert(Replacement != this && "I didn't contain From!");
2128 // Everyone using this now uses the replacement.
2129 uncheckedReplaceAllUsesWith(Replacement);
2131 // Delete the old constant!
2135 void ConstantExpr::replaceUsesOfWithOnConstant(Value *From, Value *ToV,
2137 assert(isa<Constant>(ToV) && "Cannot make Constant refer to non-constant!");
2138 Constant *To = cast<Constant>(ToV);
2140 Constant *Replacement = 0;
2141 if (getOpcode() == Instruction::GetElementPtr) {
2142 SmallVector<Constant*, 8> Indices;
2143 Constant *Pointer = getOperand(0);
2144 Indices.reserve(getNumOperands()-1);
2145 if (Pointer == From) Pointer = To;
2147 for (unsigned i = 1, e = getNumOperands(); i != e; ++i) {
2148 Constant *Val = getOperand(i);
2149 if (Val == From) Val = To;
2150 Indices.push_back(Val);
2152 Replacement = ConstantExpr::getGetElementPtr(Pointer,
2153 &Indices[0], Indices.size());
2154 } else if (getOpcode() == Instruction::ExtractValue) {
2155 Constant *Agg = getOperand(0);
2156 if (Agg == From) Agg = To;
2158 const SmallVector<unsigned, 4> &Indices = getIndices();
2159 Replacement = ConstantExpr::getExtractValue(Agg,
2160 &Indices[0], Indices.size());
2161 } else if (getOpcode() == Instruction::InsertValue) {
2162 Constant *Agg = getOperand(0);
2163 Constant *Val = getOperand(1);
2164 if (Agg == From) Agg = To;
2165 if (Val == From) Val = To;
2167 const SmallVector<unsigned, 4> &Indices = getIndices();
2168 Replacement = ConstantExpr::getInsertValue(Agg, Val,
2169 &Indices[0], Indices.size());
2170 } else if (isCast()) {
2171 assert(getOperand(0) == From && "Cast only has one use!");
2172 Replacement = ConstantExpr::getCast(getOpcode(), To, getRawType());
2173 } else if (getOpcode() == Instruction::Select) {
2174 Constant *C1 = getOperand(0);
2175 Constant *C2 = getOperand(1);
2176 Constant *C3 = getOperand(2);
2177 if (C1 == From) C1 = To;
2178 if (C2 == From) C2 = To;
2179 if (C3 == From) C3 = To;
2180 Replacement = ConstantExpr::getSelect(C1, C2, C3);
2181 } else if (getOpcode() == Instruction::ExtractElement) {
2182 Constant *C1 = getOperand(0);
2183 Constant *C2 = getOperand(1);
2184 if (C1 == From) C1 = To;
2185 if (C2 == From) C2 = To;
2186 Replacement = ConstantExpr::getExtractElement(C1, C2);
2187 } else if (getOpcode() == Instruction::InsertElement) {
2188 Constant *C1 = getOperand(0);
2189 Constant *C2 = getOperand(1);
2190 Constant *C3 = getOperand(1);
2191 if (C1 == From) C1 = To;
2192 if (C2 == From) C2 = To;
2193 if (C3 == From) C3 = To;
2194 Replacement = ConstantExpr::getInsertElement(C1, C2, C3);
2195 } else if (getOpcode() == Instruction::ShuffleVector) {
2196 Constant *C1 = getOperand(0);
2197 Constant *C2 = getOperand(1);
2198 Constant *C3 = getOperand(2);
2199 if (C1 == From) C1 = To;
2200 if (C2 == From) C2 = To;
2201 if (C3 == From) C3 = To;
2202 Replacement = ConstantExpr::getShuffleVector(C1, C2, C3);
2203 } else if (isCompare()) {
2204 Constant *C1 = getOperand(0);
2205 Constant *C2 = getOperand(1);
2206 if (C1 == From) C1 = To;
2207 if (C2 == From) C2 = To;
2208 if (getOpcode() == Instruction::ICmp)
2209 Replacement = ConstantExpr::getICmp(getPredicate(), C1, C2);
2211 assert(getOpcode() == Instruction::FCmp);
2212 Replacement = ConstantExpr::getFCmp(getPredicate(), C1, C2);
2214 } else if (getNumOperands() == 2) {
2215 Constant *C1 = getOperand(0);
2216 Constant *C2 = getOperand(1);
2217 if (C1 == From) C1 = To;
2218 if (C2 == From) C2 = To;
2219 Replacement = ConstantExpr::get(getOpcode(), C1, C2, SubclassOptionalData);
2221 llvm_unreachable("Unknown ConstantExpr type!");
2225 assert(Replacement != this && "I didn't contain From!");
2227 // Everyone using this now uses the replacement.
2228 uncheckedReplaceAllUsesWith(Replacement);
2230 // Delete the old constant!