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 static const uint64_t zero[2] = {0, 0};
44 Constant *Constant::getNullValue(const Type *Ty) {
45 switch (Ty->getTypeID()) {
46 case Type::IntegerTyID:
47 return ConstantInt::get(Ty, 0);
49 return ConstantFP::get(Ty->getContext(), APFloat(APInt(32, 0)));
50 case Type::DoubleTyID:
51 return ConstantFP::get(Ty->getContext(), APFloat(APInt(64, 0)));
52 case Type::X86_FP80TyID:
53 return ConstantFP::get(Ty->getContext(), APFloat(APInt(80, 2, zero)));
55 return ConstantFP::get(Ty->getContext(),
56 APFloat(APInt(128, 2, zero), true));
57 case Type::PPC_FP128TyID:
58 return ConstantFP::get(Ty->getContext(), APFloat(APInt(128, 2, zero)));
59 case Type::PointerTyID:
60 return ConstantPointerNull::get(cast<PointerType>(Ty));
61 case Type::StructTyID:
64 case Type::VectorTyID:
65 return ConstantAggregateZero::get(Ty);
67 // Function, Label, or Opaque type?
68 assert(!"Cannot create a null constant of that type!");
73 Constant* Constant::getIntegerValue(const Type *Ty, const APInt &V) {
74 const Type *ScalarTy = Ty->getScalarType();
76 // Create the base integer constant.
77 Constant *C = ConstantInt::get(Ty->getContext(), V);
79 // Convert an integer to a pointer, if necessary.
80 if (const PointerType *PTy = dyn_cast<PointerType>(ScalarTy))
81 C = ConstantExpr::getIntToPtr(C, PTy);
83 // Broadcast a scalar to a vector, if necessary.
84 if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
85 C = ConstantVector::get(std::vector<Constant *>(VTy->getNumElements(), C));
90 Constant* Constant::getAllOnesValue(const Type *Ty) {
91 if (const IntegerType *ITy = dyn_cast<IntegerType>(Ty))
92 return ConstantInt::get(Ty->getContext(),
93 APInt::getAllOnesValue(ITy->getBitWidth()));
95 std::vector<Constant*> Elts;
96 const VectorType *VTy = cast<VectorType>(Ty);
97 Elts.resize(VTy->getNumElements(), getAllOnesValue(VTy->getElementType()));
98 assert(Elts[0] && "Not a vector integer type!");
99 return cast<ConstantVector>(ConstantVector::get(Elts));
102 void Constant::destroyConstantImpl() {
103 // When a Constant is destroyed, there may be lingering
104 // references to the constant by other constants in the constant pool. These
105 // constants are implicitly dependent on the module that is being deleted,
106 // but they don't know that. Because we only find out when the CPV is
107 // deleted, we must now notify all of our users (that should only be
108 // Constants) that they are, in fact, invalid now and should be deleted.
110 while (!use_empty()) {
111 Value *V = use_back();
112 #ifndef NDEBUG // Only in -g mode...
113 if (!isa<Constant>(V)) {
114 dbgs() << "While deleting: " << *this
115 << "\n\nUse still stuck around after Def is destroyed: "
119 assert(isa<Constant>(V) && "References remain to Constant being destroyed");
120 Constant *CV = cast<Constant>(V);
121 CV->destroyConstant();
123 // The constant should remove itself from our use list...
124 assert((use_empty() || use_back() != V) && "Constant not removed!");
127 // Value has no outstanding references it is safe to delete it now...
131 /// canTrap - Return true if evaluation of this constant could trap. This is
132 /// true for things like constant expressions that could divide by zero.
133 bool Constant::canTrap() const {
134 assert(getType()->isFirstClassType() && "Cannot evaluate aggregate vals!");
135 // The only thing that could possibly trap are constant exprs.
136 const ConstantExpr *CE = dyn_cast<ConstantExpr>(this);
137 if (!CE) return false;
139 // ConstantExpr traps if any operands can trap.
140 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
141 if (CE->getOperand(i)->canTrap())
144 // Otherwise, only specific operations can trap.
145 switch (CE->getOpcode()) {
148 case Instruction::UDiv:
149 case Instruction::SDiv:
150 case Instruction::FDiv:
151 case Instruction::URem:
152 case Instruction::SRem:
153 case Instruction::FRem:
154 // Div and rem can trap if the RHS is not known to be non-zero.
155 if (!isa<ConstantInt>(CE->getOperand(1)) ||CE->getOperand(1)->isNullValue())
161 /// isConstantUsed - Return true if the constant has users other than constant
162 /// exprs and other dangling things.
163 bool Constant::isConstantUsed() const {
164 for (const_use_iterator UI = use_begin(), E = use_end(); UI != E; ++UI) {
165 const Constant *UC = dyn_cast<Constant>(*UI);
166 if (UC == 0 || isa<GlobalValue>(UC))
169 if (UC->isConstantUsed())
177 /// getRelocationInfo - This method classifies the entry according to
178 /// whether or not it may generate a relocation entry. This must be
179 /// conservative, so if it might codegen to a relocatable entry, it should say
180 /// so. The return values are:
182 /// NoRelocation: This constant pool entry is guaranteed to never have a
183 /// relocation applied to it (because it holds a simple constant like
185 /// LocalRelocation: This entry has relocations, but the entries are
186 /// guaranteed to be resolvable by the static linker, so the dynamic
187 /// linker will never see them.
188 /// GlobalRelocations: This entry may have arbitrary relocations.
190 /// FIXME: This really should not be in VMCore.
191 Constant::PossibleRelocationsTy Constant::getRelocationInfo() const {
192 if (const GlobalValue *GV = dyn_cast<GlobalValue>(this)) {
193 if (GV->hasLocalLinkage() || GV->hasHiddenVisibility())
194 return LocalRelocation; // Local to this file/library.
195 return GlobalRelocations; // Global reference.
198 if (const BlockAddress *BA = dyn_cast<BlockAddress>(this))
199 return BA->getFunction()->getRelocationInfo();
201 // While raw uses of blockaddress need to be relocated, differences between
202 // two of them don't when they are for labels in the same function. This is a
203 // common idiom when creating a table for the indirect goto extension, so we
204 // handle it efficiently here.
205 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(this))
206 if (CE->getOpcode() == Instruction::Sub) {
207 ConstantExpr *LHS = dyn_cast<ConstantExpr>(CE->getOperand(0));
208 ConstantExpr *RHS = dyn_cast<ConstantExpr>(CE->getOperand(1));
210 LHS->getOpcode() == Instruction::PtrToInt &&
211 RHS->getOpcode() == Instruction::PtrToInt &&
212 isa<BlockAddress>(LHS->getOperand(0)) &&
213 isa<BlockAddress>(RHS->getOperand(0)) &&
214 cast<BlockAddress>(LHS->getOperand(0))->getFunction() ==
215 cast<BlockAddress>(RHS->getOperand(0))->getFunction())
219 PossibleRelocationsTy Result = NoRelocation;
220 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
221 Result = std::max(Result,
222 cast<Constant>(getOperand(i))->getRelocationInfo());
228 /// getVectorElements - This method, which is only valid on constant of vector
229 /// type, returns the elements of the vector in the specified smallvector.
230 /// This handles breaking down a vector undef into undef elements, etc. For
231 /// constant exprs and other cases we can't handle, we return an empty vector.
232 void Constant::getVectorElements(SmallVectorImpl<Constant*> &Elts) const {
233 assert(getType()->isVectorTy() && "Not a vector constant!");
235 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this)) {
236 for (unsigned i = 0, e = CV->getNumOperands(); i != e; ++i)
237 Elts.push_back(CV->getOperand(i));
241 const VectorType *VT = cast<VectorType>(getType());
242 if (isa<ConstantAggregateZero>(this)) {
243 Elts.assign(VT->getNumElements(),
244 Constant::getNullValue(VT->getElementType()));
248 if (isa<UndefValue>(this)) {
249 Elts.assign(VT->getNumElements(), UndefValue::get(VT->getElementType()));
253 // Unknown type, must be constant expr etc.
258 //===----------------------------------------------------------------------===//
260 //===----------------------------------------------------------------------===//
262 ConstantInt::ConstantInt(const IntegerType *Ty, const APInt& V)
263 : Constant(Ty, ConstantIntVal, 0, 0), Val(V) {
264 assert(V.getBitWidth() == Ty->getBitWidth() && "Invalid constant for type");
267 ConstantInt* ConstantInt::getTrue(LLVMContext &Context) {
268 LLVMContextImpl *pImpl = Context.pImpl;
269 if (pImpl->TheTrueVal)
270 return pImpl->TheTrueVal;
272 return (pImpl->TheTrueVal =
273 ConstantInt::get(IntegerType::get(Context, 1), 1));
276 ConstantInt* ConstantInt::getFalse(LLVMContext &Context) {
277 LLVMContextImpl *pImpl = Context.pImpl;
278 if (pImpl->TheFalseVal)
279 return pImpl->TheFalseVal;
281 return (pImpl->TheFalseVal =
282 ConstantInt::get(IntegerType::get(Context, 1), 0));
286 // Get a ConstantInt from an APInt. Note that the value stored in the DenseMap
287 // as the key, is a DenseMapAPIntKeyInfo::KeyTy which has provided the
288 // operator== and operator!= to ensure that the DenseMap doesn't attempt to
289 // compare APInt's of different widths, which would violate an APInt class
290 // invariant which generates an assertion.
291 ConstantInt *ConstantInt::get(LLVMContext &Context, const APInt& V) {
292 // Get the corresponding integer type for the bit width of the value.
293 const IntegerType *ITy = IntegerType::get(Context, V.getBitWidth());
294 // get an existing value or the insertion position
295 DenseMapAPIntKeyInfo::KeyTy Key(V, ITy);
296 ConstantInt *&Slot = Context.pImpl->IntConstants[Key];
297 if (!Slot) Slot = new ConstantInt(ITy, V);
301 Constant* ConstantInt::get(const Type* Ty, uint64_t V, bool isSigned) {
302 Constant *C = get(cast<IntegerType>(Ty->getScalarType()),
305 // For vectors, broadcast the value.
306 if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
307 return ConstantVector::get(
308 std::vector<Constant *>(VTy->getNumElements(), C));
313 ConstantInt* ConstantInt::get(const IntegerType* Ty, uint64_t V,
315 return get(Ty->getContext(), APInt(Ty->getBitWidth(), V, isSigned));
318 ConstantInt* ConstantInt::getSigned(const IntegerType* Ty, int64_t V) {
319 return get(Ty, V, true);
322 Constant *ConstantInt::getSigned(const Type *Ty, int64_t V) {
323 return get(Ty, V, true);
326 Constant* ConstantInt::get(const Type* Ty, const APInt& V) {
327 ConstantInt *C = get(Ty->getContext(), V);
328 assert(C->getType() == Ty->getScalarType() &&
329 "ConstantInt type doesn't match the type implied by its value!");
331 // For vectors, broadcast the value.
332 if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
333 return ConstantVector::get(
334 std::vector<Constant *>(VTy->getNumElements(), C));
339 ConstantInt* ConstantInt::get(const IntegerType* Ty, StringRef Str,
341 return get(Ty->getContext(), APInt(Ty->getBitWidth(), Str, radix));
344 //===----------------------------------------------------------------------===//
346 //===----------------------------------------------------------------------===//
348 static const fltSemantics *TypeToFloatSemantics(const Type *Ty) {
350 return &APFloat::IEEEsingle;
351 if (Ty->isDoubleTy())
352 return &APFloat::IEEEdouble;
353 if (Ty->isX86_FP80Ty())
354 return &APFloat::x87DoubleExtended;
355 else if (Ty->isFP128Ty())
356 return &APFloat::IEEEquad;
358 assert(Ty->isPPC_FP128Ty() && "Unknown FP format");
359 return &APFloat::PPCDoubleDouble;
362 /// get() - This returns a constant fp for the specified value in the
363 /// specified type. This should only be used for simple constant values like
364 /// 2.0/1.0 etc, that are known-valid both as double and as the target format.
365 Constant* ConstantFP::get(const Type* Ty, double V) {
366 LLVMContext &Context = Ty->getContext();
370 FV.convert(*TypeToFloatSemantics(Ty->getScalarType()),
371 APFloat::rmNearestTiesToEven, &ignored);
372 Constant *C = get(Context, FV);
374 // For vectors, broadcast the value.
375 if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
376 return ConstantVector::get(
377 std::vector<Constant *>(VTy->getNumElements(), C));
383 Constant* ConstantFP::get(const Type* Ty, StringRef Str) {
384 LLVMContext &Context = Ty->getContext();
386 APFloat FV(*TypeToFloatSemantics(Ty->getScalarType()), Str);
387 Constant *C = get(Context, FV);
389 // For vectors, broadcast the value.
390 if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
391 return ConstantVector::get(
392 std::vector<Constant *>(VTy->getNumElements(), C));
398 ConstantFP* ConstantFP::getNegativeZero(const Type* Ty) {
399 LLVMContext &Context = Ty->getContext();
400 APFloat apf = cast <ConstantFP>(Constant::getNullValue(Ty))->getValueAPF();
402 return get(Context, apf);
406 Constant* ConstantFP::getZeroValueForNegation(const Type* Ty) {
407 if (const VectorType *PTy = dyn_cast<VectorType>(Ty))
408 if (PTy->getElementType()->isFloatingPointTy()) {
409 std::vector<Constant*> zeros(PTy->getNumElements(),
410 getNegativeZero(PTy->getElementType()));
411 return ConstantVector::get(PTy, zeros);
414 if (Ty->isFloatingPointTy())
415 return getNegativeZero(Ty);
417 return Constant::getNullValue(Ty);
421 // ConstantFP accessors.
422 ConstantFP* ConstantFP::get(LLVMContext &Context, const APFloat& V) {
423 DenseMapAPFloatKeyInfo::KeyTy Key(V);
425 LLVMContextImpl* pImpl = Context.pImpl;
427 ConstantFP *&Slot = pImpl->FPConstants[Key];
431 if (&V.getSemantics() == &APFloat::IEEEsingle)
432 Ty = Type::getFloatTy(Context);
433 else if (&V.getSemantics() == &APFloat::IEEEdouble)
434 Ty = Type::getDoubleTy(Context);
435 else if (&V.getSemantics() == &APFloat::x87DoubleExtended)
436 Ty = Type::getX86_FP80Ty(Context);
437 else if (&V.getSemantics() == &APFloat::IEEEquad)
438 Ty = Type::getFP128Ty(Context);
440 assert(&V.getSemantics() == &APFloat::PPCDoubleDouble &&
441 "Unknown FP format");
442 Ty = Type::getPPC_FP128Ty(Context);
444 Slot = new ConstantFP(Ty, V);
450 ConstantFP *ConstantFP::getInfinity(const Type *Ty, bool Negative) {
451 const fltSemantics &Semantics = *TypeToFloatSemantics(Ty);
452 return ConstantFP::get(Ty->getContext(),
453 APFloat::getInf(Semantics, Negative));
456 ConstantFP::ConstantFP(const Type *Ty, const APFloat& V)
457 : Constant(Ty, ConstantFPVal, 0, 0), Val(V) {
458 assert(&V.getSemantics() == TypeToFloatSemantics(Ty) &&
462 bool ConstantFP::isNullValue() const {
463 return Val.isZero() && !Val.isNegative();
466 bool ConstantFP::isExactlyValue(const APFloat& V) const {
467 return Val.bitwiseIsEqual(V);
470 //===----------------------------------------------------------------------===//
471 // ConstantXXX Classes
472 //===----------------------------------------------------------------------===//
475 ConstantArray::ConstantArray(const ArrayType *T,
476 const std::vector<Constant*> &V)
477 : Constant(T, ConstantArrayVal,
478 OperandTraits<ConstantArray>::op_end(this) - V.size(),
480 assert(V.size() == T->getNumElements() &&
481 "Invalid initializer vector for constant array");
482 Use *OL = OperandList;
483 for (std::vector<Constant*>::const_iterator I = V.begin(), E = V.end();
486 assert(C->getType() == T->getElementType() &&
487 "Initializer for array element doesn't match array element type!");
492 Constant *ConstantArray::get(const ArrayType *Ty,
493 const std::vector<Constant*> &V) {
494 for (unsigned i = 0, e = V.size(); i != e; ++i) {
495 assert(V[i]->getType() == Ty->getElementType() &&
496 "Wrong type in array element initializer");
498 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
499 // If this is an all-zero array, return a ConstantAggregateZero object
502 if (!C->isNullValue())
503 return pImpl->ArrayConstants.getOrCreate(Ty, V);
505 for (unsigned i = 1, e = V.size(); i != e; ++i)
507 return pImpl->ArrayConstants.getOrCreate(Ty, V);
510 return ConstantAggregateZero::get(Ty);
514 Constant* ConstantArray::get(const ArrayType* T, Constant* const* Vals,
516 // FIXME: make this the primary ctor method.
517 return get(T, std::vector<Constant*>(Vals, Vals+NumVals));
520 /// ConstantArray::get(const string&) - Return an array that is initialized to
521 /// contain the specified string. If length is zero then a null terminator is
522 /// added to the specified string so that it may be used in a natural way.
523 /// Otherwise, the length parameter specifies how much of the string to use
524 /// and it won't be null terminated.
526 Constant* ConstantArray::get(LLVMContext &Context, StringRef Str,
528 std::vector<Constant*> ElementVals;
529 ElementVals.reserve(Str.size() + size_t(AddNull));
530 for (unsigned i = 0; i < Str.size(); ++i)
531 ElementVals.push_back(ConstantInt::get(Type::getInt8Ty(Context), Str[i]));
533 // Add a null terminator to the string...
535 ElementVals.push_back(ConstantInt::get(Type::getInt8Ty(Context), 0));
538 ArrayType *ATy = ArrayType::get(Type::getInt8Ty(Context), ElementVals.size());
539 return get(ATy, ElementVals);
544 ConstantStruct::ConstantStruct(const StructType *T,
545 const std::vector<Constant*> &V)
546 : Constant(T, ConstantStructVal,
547 OperandTraits<ConstantStruct>::op_end(this) - V.size(),
549 assert(V.size() == T->getNumElements() &&
550 "Invalid initializer vector for constant structure");
551 Use *OL = OperandList;
552 for (std::vector<Constant*>::const_iterator I = V.begin(), E = V.end();
555 assert(C->getType() == T->getElementType(I-V.begin()) &&
556 "Initializer for struct element doesn't match struct element type!");
561 // ConstantStruct accessors.
562 Constant* ConstantStruct::get(const StructType* T,
563 const std::vector<Constant*>& V) {
564 LLVMContextImpl* pImpl = T->getContext().pImpl;
566 // Create a ConstantAggregateZero value if all elements are zeros...
567 for (unsigned i = 0, e = V.size(); i != e; ++i)
568 if (!V[i]->isNullValue())
569 return pImpl->StructConstants.getOrCreate(T, V);
571 return ConstantAggregateZero::get(T);
574 Constant* ConstantStruct::get(LLVMContext &Context,
575 const std::vector<Constant*>& V, bool packed) {
576 std::vector<const Type*> StructEls;
577 StructEls.reserve(V.size());
578 for (unsigned i = 0, e = V.size(); i != e; ++i)
579 StructEls.push_back(V[i]->getType());
580 return get(StructType::get(Context, StructEls, packed), V);
583 Constant* ConstantStruct::get(LLVMContext &Context,
584 Constant* const *Vals, unsigned NumVals,
586 // FIXME: make this the primary ctor method.
587 return get(Context, std::vector<Constant*>(Vals, Vals+NumVals), Packed);
590 ConstantUnion::ConstantUnion(const UnionType *T, Constant* V)
591 : Constant(T, ConstantUnionVal,
592 OperandTraits<ConstantUnion>::op_end(this) - 1, 1) {
593 Use *OL = OperandList;
594 assert(T->getElementTypeIndex(V->getType()) >= 0 &&
595 "Initializer for union element isn't a member of union type!");
599 // ConstantUnion accessors.
600 Constant* ConstantUnion::get(const UnionType* T, Constant* V) {
601 LLVMContextImpl* pImpl = T->getContext().pImpl;
603 // Create a ConstantAggregateZero value if all elements are zeros...
604 if (!V->isNullValue())
605 return pImpl->UnionConstants.getOrCreate(T, V);
607 return ConstantAggregateZero::get(T);
611 ConstantVector::ConstantVector(const VectorType *T,
612 const std::vector<Constant*> &V)
613 : Constant(T, ConstantVectorVal,
614 OperandTraits<ConstantVector>::op_end(this) - V.size(),
616 Use *OL = OperandList;
617 for (std::vector<Constant*>::const_iterator I = V.begin(), E = V.end();
620 assert(C->getType() == T->getElementType() &&
621 "Initializer for vector element doesn't match vector element type!");
626 // ConstantVector accessors.
627 Constant* ConstantVector::get(const VectorType* T,
628 const std::vector<Constant*>& V) {
629 assert(!V.empty() && "Vectors can't be empty");
630 LLVMContext &Context = T->getContext();
631 LLVMContextImpl *pImpl = Context.pImpl;
633 // If this is an all-undef or alll-zero vector, return a
634 // ConstantAggregateZero or UndefValue.
636 bool isZero = C->isNullValue();
637 bool isUndef = isa<UndefValue>(C);
639 if (isZero || isUndef) {
640 for (unsigned i = 1, e = V.size(); i != e; ++i)
642 isZero = isUndef = false;
648 return ConstantAggregateZero::get(T);
650 return UndefValue::get(T);
652 return pImpl->VectorConstants.getOrCreate(T, V);
655 Constant* ConstantVector::get(const std::vector<Constant*>& V) {
656 assert(!V.empty() && "Cannot infer type if V is empty");
657 return get(VectorType::get(V.front()->getType(),V.size()), V);
660 Constant* ConstantVector::get(Constant* const* Vals, unsigned NumVals) {
661 // FIXME: make this the primary ctor method.
662 return get(std::vector<Constant*>(Vals, Vals+NumVals));
665 Constant* ConstantExpr::getNSWNeg(Constant* C) {
666 assert(C->getType()->isIntOrIntVectorTy() &&
667 "Cannot NEG a nonintegral value!");
668 return getNSWSub(ConstantFP::getZeroValueForNegation(C->getType()), C);
671 Constant* ConstantExpr::getNUWNeg(Constant* C) {
672 assert(C->getType()->isIntOrIntVectorTy() &&
673 "Cannot NEG a nonintegral value!");
674 return getNUWSub(ConstantFP::getZeroValueForNegation(C->getType()), C);
677 Constant* ConstantExpr::getNSWAdd(Constant* C1, Constant* C2) {
678 return getTy(C1->getType(), Instruction::Add, C1, C2,
679 OverflowingBinaryOperator::NoSignedWrap);
682 Constant* ConstantExpr::getNUWAdd(Constant* C1, Constant* C2) {
683 return getTy(C1->getType(), Instruction::Add, C1, C2,
684 OverflowingBinaryOperator::NoUnsignedWrap);
687 Constant* ConstantExpr::getNSWSub(Constant* C1, Constant* C2) {
688 return getTy(C1->getType(), Instruction::Sub, C1, C2,
689 OverflowingBinaryOperator::NoSignedWrap);
692 Constant* ConstantExpr::getNUWSub(Constant* C1, Constant* C2) {
693 return getTy(C1->getType(), Instruction::Sub, C1, C2,
694 OverflowingBinaryOperator::NoUnsignedWrap);
697 Constant* ConstantExpr::getNSWMul(Constant* C1, Constant* C2) {
698 return getTy(C1->getType(), Instruction::Mul, C1, C2,
699 OverflowingBinaryOperator::NoSignedWrap);
702 Constant* ConstantExpr::getNUWMul(Constant* C1, Constant* C2) {
703 return getTy(C1->getType(), Instruction::Mul, C1, C2,
704 OverflowingBinaryOperator::NoUnsignedWrap);
707 Constant* ConstantExpr::getExactSDiv(Constant* C1, Constant* C2) {
708 return getTy(C1->getType(), Instruction::SDiv, C1, C2,
709 SDivOperator::IsExact);
712 // Utility function for determining if a ConstantExpr is a CastOp or not. This
713 // can't be inline because we don't want to #include Instruction.h into
715 bool ConstantExpr::isCast() const {
716 return Instruction::isCast(getOpcode());
719 bool ConstantExpr::isCompare() const {
720 return getOpcode() == Instruction::ICmp || getOpcode() == Instruction::FCmp;
723 bool ConstantExpr::isGEPWithNoNotionalOverIndexing() const {
724 if (getOpcode() != Instruction::GetElementPtr) return false;
726 gep_type_iterator GEPI = gep_type_begin(this), E = gep_type_end(this);
727 User::const_op_iterator OI = next(this->op_begin());
729 // Skip the first index, as it has no static limit.
733 // The remaining indices must be compile-time known integers within the
734 // bounds of the corresponding notional static array types.
735 for (; GEPI != E; ++GEPI, ++OI) {
736 ConstantInt *CI = dyn_cast<ConstantInt>(*OI);
737 if (!CI) return false;
738 if (const ArrayType *ATy = dyn_cast<ArrayType>(*GEPI))
739 if (CI->getValue().getActiveBits() > 64 ||
740 CI->getZExtValue() >= ATy->getNumElements())
744 // All the indices checked out.
748 bool ConstantExpr::hasIndices() const {
749 return getOpcode() == Instruction::ExtractValue ||
750 getOpcode() == Instruction::InsertValue;
753 const SmallVector<unsigned, 4> &ConstantExpr::getIndices() const {
754 if (const ExtractValueConstantExpr *EVCE =
755 dyn_cast<ExtractValueConstantExpr>(this))
756 return EVCE->Indices;
758 return cast<InsertValueConstantExpr>(this)->Indices;
761 unsigned ConstantExpr::getPredicate() const {
762 assert(getOpcode() == Instruction::FCmp ||
763 getOpcode() == Instruction::ICmp);
764 return ((const CompareConstantExpr*)this)->predicate;
767 /// getWithOperandReplaced - Return a constant expression identical to this
768 /// one, but with the specified operand set to the specified value.
770 ConstantExpr::getWithOperandReplaced(unsigned OpNo, Constant *Op) const {
771 assert(OpNo < getNumOperands() && "Operand num is out of range!");
772 assert(Op->getType() == getOperand(OpNo)->getType() &&
773 "Replacing operand with value of different type!");
774 if (getOperand(OpNo) == Op)
775 return const_cast<ConstantExpr*>(this);
777 Constant *Op0, *Op1, *Op2;
778 switch (getOpcode()) {
779 case Instruction::Trunc:
780 case Instruction::ZExt:
781 case Instruction::SExt:
782 case Instruction::FPTrunc:
783 case Instruction::FPExt:
784 case Instruction::UIToFP:
785 case Instruction::SIToFP:
786 case Instruction::FPToUI:
787 case Instruction::FPToSI:
788 case Instruction::PtrToInt:
789 case Instruction::IntToPtr:
790 case Instruction::BitCast:
791 return ConstantExpr::getCast(getOpcode(), Op, getType());
792 case Instruction::Select:
793 Op0 = (OpNo == 0) ? Op : getOperand(0);
794 Op1 = (OpNo == 1) ? Op : getOperand(1);
795 Op2 = (OpNo == 2) ? Op : getOperand(2);
796 return ConstantExpr::getSelect(Op0, Op1, Op2);
797 case Instruction::InsertElement:
798 Op0 = (OpNo == 0) ? Op : getOperand(0);
799 Op1 = (OpNo == 1) ? Op : getOperand(1);
800 Op2 = (OpNo == 2) ? Op : getOperand(2);
801 return ConstantExpr::getInsertElement(Op0, Op1, Op2);
802 case Instruction::ExtractElement:
803 Op0 = (OpNo == 0) ? Op : getOperand(0);
804 Op1 = (OpNo == 1) ? Op : getOperand(1);
805 return ConstantExpr::getExtractElement(Op0, Op1);
806 case Instruction::ShuffleVector:
807 Op0 = (OpNo == 0) ? Op : getOperand(0);
808 Op1 = (OpNo == 1) ? Op : getOperand(1);
809 Op2 = (OpNo == 2) ? Op : getOperand(2);
810 return ConstantExpr::getShuffleVector(Op0, Op1, Op2);
811 case Instruction::GetElementPtr: {
812 SmallVector<Constant*, 8> Ops;
813 Ops.resize(getNumOperands()-1);
814 for (unsigned i = 1, e = getNumOperands(); i != e; ++i)
815 Ops[i-1] = getOperand(i);
817 return cast<GEPOperator>(this)->isInBounds() ?
818 ConstantExpr::getInBoundsGetElementPtr(Op, &Ops[0], Ops.size()) :
819 ConstantExpr::getGetElementPtr(Op, &Ops[0], Ops.size());
821 return cast<GEPOperator>(this)->isInBounds() ?
822 ConstantExpr::getInBoundsGetElementPtr(getOperand(0), &Ops[0],Ops.size()):
823 ConstantExpr::getGetElementPtr(getOperand(0), &Ops[0], Ops.size());
826 assert(getNumOperands() == 2 && "Must be binary operator?");
827 Op0 = (OpNo == 0) ? Op : getOperand(0);
828 Op1 = (OpNo == 1) ? Op : getOperand(1);
829 return ConstantExpr::get(getOpcode(), Op0, Op1, SubclassOptionalData);
833 /// getWithOperands - This returns the current constant expression with the
834 /// operands replaced with the specified values. The specified operands must
835 /// match count and type with the existing ones.
836 Constant *ConstantExpr::
837 getWithOperands(Constant* const *Ops, unsigned NumOps) const {
838 assert(NumOps == getNumOperands() && "Operand count mismatch!");
839 bool AnyChange = false;
840 for (unsigned i = 0; i != NumOps; ++i) {
841 assert(Ops[i]->getType() == getOperand(i)->getType() &&
842 "Operand type mismatch!");
843 AnyChange |= Ops[i] != getOperand(i);
845 if (!AnyChange) // No operands changed, return self.
846 return const_cast<ConstantExpr*>(this);
848 switch (getOpcode()) {
849 case Instruction::Trunc:
850 case Instruction::ZExt:
851 case Instruction::SExt:
852 case Instruction::FPTrunc:
853 case Instruction::FPExt:
854 case Instruction::UIToFP:
855 case Instruction::SIToFP:
856 case Instruction::FPToUI:
857 case Instruction::FPToSI:
858 case Instruction::PtrToInt:
859 case Instruction::IntToPtr:
860 case Instruction::BitCast:
861 return ConstantExpr::getCast(getOpcode(), Ops[0], getType());
862 case Instruction::Select:
863 return ConstantExpr::getSelect(Ops[0], Ops[1], Ops[2]);
864 case Instruction::InsertElement:
865 return ConstantExpr::getInsertElement(Ops[0], Ops[1], Ops[2]);
866 case Instruction::ExtractElement:
867 return ConstantExpr::getExtractElement(Ops[0], Ops[1]);
868 case Instruction::ShuffleVector:
869 return ConstantExpr::getShuffleVector(Ops[0], Ops[1], Ops[2]);
870 case Instruction::GetElementPtr:
871 return cast<GEPOperator>(this)->isInBounds() ?
872 ConstantExpr::getInBoundsGetElementPtr(Ops[0], &Ops[1], NumOps-1) :
873 ConstantExpr::getGetElementPtr(Ops[0], &Ops[1], NumOps-1);
874 case Instruction::ICmp:
875 case Instruction::FCmp:
876 return ConstantExpr::getCompare(getPredicate(), Ops[0], Ops[1]);
878 assert(getNumOperands() == 2 && "Must be binary operator?");
879 return ConstantExpr::get(getOpcode(), Ops[0], Ops[1], SubclassOptionalData);
884 //===----------------------------------------------------------------------===//
885 // isValueValidForType implementations
887 bool ConstantInt::isValueValidForType(const Type *Ty, uint64_t Val) {
888 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth(); // assert okay
889 if (Ty == Type::getInt1Ty(Ty->getContext()))
890 return Val == 0 || Val == 1;
892 return true; // always true, has to fit in largest type
893 uint64_t Max = (1ll << NumBits) - 1;
897 bool ConstantInt::isValueValidForType(const Type *Ty, int64_t Val) {
898 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth(); // assert okay
899 if (Ty == Type::getInt1Ty(Ty->getContext()))
900 return Val == 0 || Val == 1 || Val == -1;
902 return true; // always true, has to fit in largest type
903 int64_t Min = -(1ll << (NumBits-1));
904 int64_t Max = (1ll << (NumBits-1)) - 1;
905 return (Val >= Min && Val <= Max);
908 bool ConstantFP::isValueValidForType(const Type *Ty, const APFloat& Val) {
909 // convert modifies in place, so make a copy.
910 APFloat Val2 = APFloat(Val);
912 switch (Ty->getTypeID()) {
914 return false; // These can't be represented as floating point!
916 // FIXME rounding mode needs to be more flexible
917 case Type::FloatTyID: {
918 if (&Val2.getSemantics() == &APFloat::IEEEsingle)
920 Val2.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, &losesInfo);
923 case Type::DoubleTyID: {
924 if (&Val2.getSemantics() == &APFloat::IEEEsingle ||
925 &Val2.getSemantics() == &APFloat::IEEEdouble)
927 Val2.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &losesInfo);
930 case Type::X86_FP80TyID:
931 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
932 &Val2.getSemantics() == &APFloat::IEEEdouble ||
933 &Val2.getSemantics() == &APFloat::x87DoubleExtended;
934 case Type::FP128TyID:
935 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
936 &Val2.getSemantics() == &APFloat::IEEEdouble ||
937 &Val2.getSemantics() == &APFloat::IEEEquad;
938 case Type::PPC_FP128TyID:
939 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
940 &Val2.getSemantics() == &APFloat::IEEEdouble ||
941 &Val2.getSemantics() == &APFloat::PPCDoubleDouble;
945 //===----------------------------------------------------------------------===//
946 // Factory Function Implementation
948 ConstantAggregateZero* ConstantAggregateZero::get(const Type* Ty) {
949 assert((Ty->isStructTy() || Ty->isUnionTy()
950 || Ty->isArrayTy() || Ty->isVectorTy()) &&
951 "Cannot create an aggregate zero of non-aggregate type!");
953 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
954 return pImpl->AggZeroConstants.getOrCreate(Ty, 0);
957 /// destroyConstant - Remove the constant from the constant table...
959 void ConstantAggregateZero::destroyConstant() {
960 getRawType()->getContext().pImpl->AggZeroConstants.remove(this);
961 destroyConstantImpl();
964 /// destroyConstant - Remove the constant from the constant table...
966 void ConstantArray::destroyConstant() {
967 getRawType()->getContext().pImpl->ArrayConstants.remove(this);
968 destroyConstantImpl();
971 /// isString - This method returns true if the array is an array of i8, and
972 /// if the elements of the array are all ConstantInt's.
973 bool ConstantArray::isString() const {
974 // Check the element type for i8...
975 if (!getType()->getElementType()->isIntegerTy(8))
977 // Check the elements to make sure they are all integers, not constant
979 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
980 if (!isa<ConstantInt>(getOperand(i)))
985 /// isCString - This method returns true if the array is a string (see
986 /// isString) and it ends in a null byte \\0 and does not contains any other
987 /// null bytes except its terminator.
988 bool ConstantArray::isCString() const {
989 // Check the element type for i8...
990 if (!getType()->getElementType()->isIntegerTy(8))
993 // Last element must be a null.
994 if (!getOperand(getNumOperands()-1)->isNullValue())
996 // Other elements must be non-null integers.
997 for (unsigned i = 0, e = getNumOperands()-1; i != e; ++i) {
998 if (!isa<ConstantInt>(getOperand(i)))
1000 if (getOperand(i)->isNullValue())
1007 /// getAsString - If the sub-element type of this array is i8
1008 /// then this method converts the array to an std::string and returns it.
1009 /// Otherwise, it asserts out.
1011 std::string ConstantArray::getAsString() const {
1012 assert(isString() && "Not a string!");
1014 Result.reserve(getNumOperands());
1015 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
1016 Result.push_back((char)cast<ConstantInt>(getOperand(i))->getZExtValue());
1021 //---- ConstantStruct::get() implementation...
1028 // destroyConstant - Remove the constant from the constant table...
1030 void ConstantStruct::destroyConstant() {
1031 getRawType()->getContext().pImpl->StructConstants.remove(this);
1032 destroyConstantImpl();
1035 // destroyConstant - Remove the constant from the constant table...
1037 void ConstantUnion::destroyConstant() {
1038 getRawType()->getContext().pImpl->UnionConstants.remove(this);
1039 destroyConstantImpl();
1042 // destroyConstant - Remove the constant from the constant table...
1044 void ConstantVector::destroyConstant() {
1045 getRawType()->getContext().pImpl->VectorConstants.remove(this);
1046 destroyConstantImpl();
1049 /// This function will return true iff every element in this vector constant
1050 /// is set to all ones.
1051 /// @returns true iff this constant's emements are all set to all ones.
1052 /// @brief Determine if the value is all ones.
1053 bool ConstantVector::isAllOnesValue() const {
1054 // Check out first element.
1055 const Constant *Elt = getOperand(0);
1056 const ConstantInt *CI = dyn_cast<ConstantInt>(Elt);
1057 if (!CI || !CI->isAllOnesValue()) return false;
1058 // Then make sure all remaining elements point to the same value.
1059 for (unsigned I = 1, E = getNumOperands(); I < E; ++I) {
1060 if (getOperand(I) != Elt) return false;
1065 /// getSplatValue - If this is a splat constant, where all of the
1066 /// elements have the same value, return that value. Otherwise return null.
1067 Constant *ConstantVector::getSplatValue() {
1068 // Check out first element.
1069 Constant *Elt = getOperand(0);
1070 // Then make sure all remaining elements point to the same value.
1071 for (unsigned I = 1, E = getNumOperands(); I < E; ++I)
1072 if (getOperand(I) != Elt) return 0;
1076 //---- ConstantPointerNull::get() implementation.
1079 ConstantPointerNull *ConstantPointerNull::get(const PointerType *Ty) {
1080 return Ty->getContext().pImpl->NullPtrConstants.getOrCreate(Ty, 0);
1083 // destroyConstant - Remove the constant from the constant table...
1085 void ConstantPointerNull::destroyConstant() {
1086 getRawType()->getContext().pImpl->NullPtrConstants.remove(this);
1087 destroyConstantImpl();
1091 //---- UndefValue::get() implementation.
1094 UndefValue *UndefValue::get(const Type *Ty) {
1095 return Ty->getContext().pImpl->UndefValueConstants.getOrCreate(Ty, 0);
1098 // destroyConstant - Remove the constant from the constant table.
1100 void UndefValue::destroyConstant() {
1101 getRawType()->getContext().pImpl->UndefValueConstants.remove(this);
1102 destroyConstantImpl();
1105 //---- BlockAddress::get() implementation.
1108 BlockAddress *BlockAddress::get(BasicBlock *BB) {
1109 assert(BB->getParent() != 0 && "Block must have a parent");
1110 return get(BB->getParent(), BB);
1113 BlockAddress *BlockAddress::get(Function *F, BasicBlock *BB) {
1115 F->getContext().pImpl->BlockAddresses[std::make_pair(F, BB)];
1117 BA = new BlockAddress(F, BB);
1119 assert(BA->getFunction() == F && "Basic block moved between functions");
1123 BlockAddress::BlockAddress(Function *F, BasicBlock *BB)
1124 : Constant(Type::getInt8PtrTy(F->getContext()), Value::BlockAddressVal,
1128 BB->AdjustBlockAddressRefCount(1);
1132 // destroyConstant - Remove the constant from the constant table.
1134 void BlockAddress::destroyConstant() {
1135 getFunction()->getRawType()->getContext().pImpl
1136 ->BlockAddresses.erase(std::make_pair(getFunction(), getBasicBlock()));
1137 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1138 destroyConstantImpl();
1141 void BlockAddress::replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) {
1142 // This could be replacing either the Basic Block or the Function. In either
1143 // case, we have to remove the map entry.
1144 Function *NewF = getFunction();
1145 BasicBlock *NewBB = getBasicBlock();
1148 NewF = cast<Function>(To);
1150 NewBB = cast<BasicBlock>(To);
1152 // See if the 'new' entry already exists, if not, just update this in place
1153 // and return early.
1154 BlockAddress *&NewBA =
1155 getContext().pImpl->BlockAddresses[std::make_pair(NewF, NewBB)];
1157 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1159 // Remove the old entry, this can't cause the map to rehash (just a
1160 // tombstone will get added).
1161 getContext().pImpl->BlockAddresses.erase(std::make_pair(getFunction(),
1164 setOperand(0, NewF);
1165 setOperand(1, NewBB);
1166 getBasicBlock()->AdjustBlockAddressRefCount(1);
1170 // Otherwise, I do need to replace this with an existing value.
1171 assert(NewBA != this && "I didn't contain From!");
1173 // Everyone using this now uses the replacement.
1174 uncheckedReplaceAllUsesWith(NewBA);
1179 //---- ConstantExpr::get() implementations.
1182 /// This is a utility function to handle folding of casts and lookup of the
1183 /// cast in the ExprConstants map. It is used by the various get* methods below.
1184 static inline Constant *getFoldedCast(
1185 Instruction::CastOps opc, Constant *C, const Type *Ty) {
1186 assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
1187 // Fold a few common cases
1188 if (Constant *FC = ConstantFoldCastInstruction(opc, C, Ty))
1191 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
1193 // Look up the constant in the table first to ensure uniqueness
1194 std::vector<Constant*> argVec(1, C);
1195 ExprMapKeyType Key(opc, argVec);
1197 return pImpl->ExprConstants.getOrCreate(Ty, Key);
1200 Constant *ConstantExpr::getCast(unsigned oc, Constant *C, const Type *Ty) {
1201 Instruction::CastOps opc = Instruction::CastOps(oc);
1202 assert(Instruction::isCast(opc) && "opcode out of range");
1203 assert(C && Ty && "Null arguments to getCast");
1204 assert(CastInst::castIsValid(opc, C, Ty) && "Invalid constantexpr cast!");
1208 llvm_unreachable("Invalid cast opcode");
1210 case Instruction::Trunc: return getTrunc(C, Ty);
1211 case Instruction::ZExt: return getZExt(C, Ty);
1212 case Instruction::SExt: return getSExt(C, Ty);
1213 case Instruction::FPTrunc: return getFPTrunc(C, Ty);
1214 case Instruction::FPExt: return getFPExtend(C, Ty);
1215 case Instruction::UIToFP: return getUIToFP(C, Ty);
1216 case Instruction::SIToFP: return getSIToFP(C, Ty);
1217 case Instruction::FPToUI: return getFPToUI(C, Ty);
1218 case Instruction::FPToSI: return getFPToSI(C, Ty);
1219 case Instruction::PtrToInt: return getPtrToInt(C, Ty);
1220 case Instruction::IntToPtr: return getIntToPtr(C, Ty);
1221 case Instruction::BitCast: return getBitCast(C, Ty);
1226 Constant *ConstantExpr::getZExtOrBitCast(Constant *C, const Type *Ty) {
1227 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1228 return getBitCast(C, Ty);
1229 return getZExt(C, Ty);
1232 Constant *ConstantExpr::getSExtOrBitCast(Constant *C, const Type *Ty) {
1233 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1234 return getBitCast(C, Ty);
1235 return getSExt(C, Ty);
1238 Constant *ConstantExpr::getTruncOrBitCast(Constant *C, const Type *Ty) {
1239 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1240 return getBitCast(C, Ty);
1241 return getTrunc(C, Ty);
1244 Constant *ConstantExpr::getPointerCast(Constant *S, const Type *Ty) {
1245 assert(S->getType()->isPointerTy() && "Invalid cast");
1246 assert((Ty->isIntegerTy() || Ty->isPointerTy()) && "Invalid cast");
1248 if (Ty->isIntegerTy())
1249 return getPtrToInt(S, Ty);
1250 return getBitCast(S, Ty);
1253 Constant *ConstantExpr::getIntegerCast(Constant *C, const Type *Ty,
1255 assert(C->getType()->isIntOrIntVectorTy() &&
1256 Ty->isIntOrIntVectorTy() && "Invalid cast");
1257 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1258 unsigned DstBits = Ty->getScalarSizeInBits();
1259 Instruction::CastOps opcode =
1260 (SrcBits == DstBits ? Instruction::BitCast :
1261 (SrcBits > DstBits ? Instruction::Trunc :
1262 (isSigned ? Instruction::SExt : Instruction::ZExt)));
1263 return getCast(opcode, C, Ty);
1266 Constant *ConstantExpr::getFPCast(Constant *C, const Type *Ty) {
1267 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1269 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1270 unsigned DstBits = Ty->getScalarSizeInBits();
1271 if (SrcBits == DstBits)
1272 return C; // Avoid a useless cast
1273 Instruction::CastOps opcode =
1274 (SrcBits > DstBits ? Instruction::FPTrunc : Instruction::FPExt);
1275 return getCast(opcode, C, Ty);
1278 Constant *ConstantExpr::getTrunc(Constant *C, const Type *Ty) {
1280 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1281 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1283 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1284 assert(C->getType()->isIntOrIntVectorTy() && "Trunc operand must be integer");
1285 assert(Ty->isIntOrIntVectorTy() && "Trunc produces only integral");
1286 assert(C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1287 "SrcTy must be larger than DestTy for Trunc!");
1289 return getFoldedCast(Instruction::Trunc, C, Ty);
1292 Constant *ConstantExpr::getSExt(Constant *C, const Type *Ty) {
1294 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1295 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1297 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1298 assert(C->getType()->isIntOrIntVectorTy() && "SExt operand must be integral");
1299 assert(Ty->isIntOrIntVectorTy() && "SExt produces only integer");
1300 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1301 "SrcTy must be smaller than DestTy for SExt!");
1303 return getFoldedCast(Instruction::SExt, C, Ty);
1306 Constant *ConstantExpr::getZExt(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()->isIntOrIntVectorTy() && "ZEXt operand must be integral");
1313 assert(Ty->isIntOrIntVectorTy() && "ZExt produces only integer");
1314 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1315 "SrcTy must be smaller than DestTy for ZExt!");
1317 return getFoldedCast(Instruction::ZExt, C, Ty);
1320 Constant *ConstantExpr::getFPTrunc(Constant *C, const Type *Ty) {
1322 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1323 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1325 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1326 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1327 C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1328 "This is an illegal floating point truncation!");
1329 return getFoldedCast(Instruction::FPTrunc, C, Ty);
1332 Constant *ConstantExpr::getFPExtend(Constant *C, const Type *Ty) {
1334 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1335 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1337 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1338 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1339 C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1340 "This is an illegal floating point extension!");
1341 return getFoldedCast(Instruction::FPExt, C, Ty);
1344 Constant *ConstantExpr::getUIToFP(Constant *C, const Type *Ty) {
1346 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1347 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1349 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1350 assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1351 "This is an illegal uint to floating point cast!");
1352 return getFoldedCast(Instruction::UIToFP, C, Ty);
1355 Constant *ConstantExpr::getSIToFP(Constant *C, const Type *Ty) {
1357 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1358 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1360 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1361 assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1362 "This is an illegal sint to floating point cast!");
1363 return getFoldedCast(Instruction::SIToFP, C, Ty);
1366 Constant *ConstantExpr::getFPToUI(Constant *C, const Type *Ty) {
1368 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1369 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1371 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1372 assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1373 "This is an illegal floating point to uint cast!");
1374 return getFoldedCast(Instruction::FPToUI, C, Ty);
1377 Constant *ConstantExpr::getFPToSI(Constant *C, const Type *Ty) {
1379 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1380 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1382 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1383 assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1384 "This is an illegal floating point to sint cast!");
1385 return getFoldedCast(Instruction::FPToSI, C, Ty);
1388 Constant *ConstantExpr::getPtrToInt(Constant *C, const Type *DstTy) {
1389 assert(C->getType()->isPointerTy() && "PtrToInt source must be pointer");
1390 assert(DstTy->isIntegerTy() && "PtrToInt destination must be integral");
1391 return getFoldedCast(Instruction::PtrToInt, C, DstTy);
1394 Constant *ConstantExpr::getIntToPtr(Constant *C, const Type *DstTy) {
1395 assert(C->getType()->isIntegerTy() && "IntToPtr source must be integral");
1396 assert(DstTy->isPointerTy() && "IntToPtr destination must be a pointer");
1397 return getFoldedCast(Instruction::IntToPtr, C, DstTy);
1400 Constant *ConstantExpr::getBitCast(Constant *C, const Type *DstTy) {
1401 assert(CastInst::castIsValid(Instruction::BitCast, C, DstTy) &&
1402 "Invalid constantexpr bitcast!");
1404 // It is common to ask for a bitcast of a value to its own type, handle this
1406 if (C->getType() == DstTy) return C;
1408 return getFoldedCast(Instruction::BitCast, C, DstTy);
1411 Constant *ConstantExpr::getTy(const Type *ReqTy, unsigned Opcode,
1412 Constant *C1, Constant *C2,
1414 // Check the operands for consistency first
1415 assert(Opcode >= Instruction::BinaryOpsBegin &&
1416 Opcode < Instruction::BinaryOpsEnd &&
1417 "Invalid opcode in binary constant expression");
1418 assert(C1->getType() == C2->getType() &&
1419 "Operand types in binary constant expression should match");
1421 if (ReqTy == C1->getType() || ReqTy == Type::getInt1Ty(ReqTy->getContext()))
1422 if (Constant *FC = ConstantFoldBinaryInstruction(Opcode, C1, C2))
1423 return FC; // Fold a few common cases...
1425 std::vector<Constant*> argVec(1, C1); argVec.push_back(C2);
1426 ExprMapKeyType Key(Opcode, argVec, 0, Flags);
1428 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1429 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1432 Constant *ConstantExpr::getCompareTy(unsigned short predicate,
1433 Constant *C1, Constant *C2) {
1434 switch (predicate) {
1435 default: llvm_unreachable("Invalid CmpInst predicate");
1436 case CmpInst::FCMP_FALSE: case CmpInst::FCMP_OEQ: case CmpInst::FCMP_OGT:
1437 case CmpInst::FCMP_OGE: case CmpInst::FCMP_OLT: case CmpInst::FCMP_OLE:
1438 case CmpInst::FCMP_ONE: case CmpInst::FCMP_ORD: case CmpInst::FCMP_UNO:
1439 case CmpInst::FCMP_UEQ: case CmpInst::FCMP_UGT: case CmpInst::FCMP_UGE:
1440 case CmpInst::FCMP_ULT: case CmpInst::FCMP_ULE: case CmpInst::FCMP_UNE:
1441 case CmpInst::FCMP_TRUE:
1442 return getFCmp(predicate, C1, C2);
1444 case CmpInst::ICMP_EQ: case CmpInst::ICMP_NE: case CmpInst::ICMP_UGT:
1445 case CmpInst::ICMP_UGE: case CmpInst::ICMP_ULT: case CmpInst::ICMP_ULE:
1446 case CmpInst::ICMP_SGT: case CmpInst::ICMP_SGE: case CmpInst::ICMP_SLT:
1447 case CmpInst::ICMP_SLE:
1448 return getICmp(predicate, C1, C2);
1452 Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2,
1456 case Instruction::Add:
1457 case Instruction::Sub:
1458 case Instruction::Mul:
1459 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1460 assert(C1->getType()->isIntOrIntVectorTy() &&
1461 "Tried to create an integer operation on a non-integer type!");
1463 case Instruction::FAdd:
1464 case Instruction::FSub:
1465 case Instruction::FMul:
1466 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1467 assert(C1->getType()->isFPOrFPVectorTy() &&
1468 "Tried to create a floating-point operation on a "
1469 "non-floating-point type!");
1471 case Instruction::UDiv:
1472 case Instruction::SDiv:
1473 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1474 assert(C1->getType()->isIntOrIntVectorTy() &&
1475 "Tried to create an arithmetic operation on a non-arithmetic type!");
1477 case Instruction::FDiv:
1478 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1479 assert(C1->getType()->isFPOrFPVectorTy() &&
1480 "Tried to create an arithmetic operation on a non-arithmetic type!");
1482 case Instruction::URem:
1483 case Instruction::SRem:
1484 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1485 assert(C1->getType()->isIntOrIntVectorTy() &&
1486 "Tried to create an arithmetic operation on a non-arithmetic type!");
1488 case Instruction::FRem:
1489 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1490 assert(C1->getType()->isFPOrFPVectorTy() &&
1491 "Tried to create an arithmetic operation on a non-arithmetic type!");
1493 case Instruction::And:
1494 case Instruction::Or:
1495 case Instruction::Xor:
1496 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1497 assert(C1->getType()->isIntOrIntVectorTy() &&
1498 "Tried to create a logical operation on a non-integral type!");
1500 case Instruction::Shl:
1501 case Instruction::LShr:
1502 case Instruction::AShr:
1503 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1504 assert(C1->getType()->isIntOrIntVectorTy() &&
1505 "Tried to create a shift operation on a non-integer type!");
1512 return getTy(C1->getType(), Opcode, C1, C2, Flags);
1515 Constant* ConstantExpr::getSizeOf(const Type* Ty) {
1516 // sizeof is implemented as: (i64) gep (Ty*)null, 1
1517 // Note that a non-inbounds gep is used, as null isn't within any object.
1518 Constant *GEPIdx = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1519 Constant *GEP = getGetElementPtr(
1520 Constant::getNullValue(PointerType::getUnqual(Ty)), &GEPIdx, 1);
1521 return getPtrToInt(GEP,
1522 Type::getInt64Ty(Ty->getContext()));
1525 Constant* ConstantExpr::getAlignOf(const Type* Ty) {
1526 // alignof is implemented as: (i64) gep ({i1,Ty}*)null, 0, 1
1527 // Note that a non-inbounds gep is used, as null isn't within any object.
1528 const Type *AligningTy = StructType::get(Ty->getContext(),
1529 Type::getInt1Ty(Ty->getContext()), Ty, NULL);
1530 Constant *NullPtr = Constant::getNullValue(AligningTy->getPointerTo());
1531 Constant *Zero = ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0);
1532 Constant *One = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1533 Constant *Indices[2] = { Zero, One };
1534 Constant *GEP = getGetElementPtr(NullPtr, Indices, 2);
1535 return getPtrToInt(GEP,
1536 Type::getInt64Ty(Ty->getContext()));
1539 Constant* ConstantExpr::getOffsetOf(const StructType* STy, unsigned FieldNo) {
1540 return getOffsetOf(STy, ConstantInt::get(Type::getInt32Ty(STy->getContext()),
1544 Constant* ConstantExpr::getOffsetOf(const Type* Ty, Constant *FieldNo) {
1545 // offsetof is implemented as: (i64) gep (Ty*)null, 0, FieldNo
1546 // Note that a non-inbounds gep is used, as null isn't within any object.
1547 Constant *GEPIdx[] = {
1548 ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0),
1551 Constant *GEP = getGetElementPtr(
1552 Constant::getNullValue(PointerType::getUnqual(Ty)), GEPIdx, 2);
1553 return getPtrToInt(GEP,
1554 Type::getInt64Ty(Ty->getContext()));
1557 Constant *ConstantExpr::getCompare(unsigned short pred,
1558 Constant *C1, Constant *C2) {
1559 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1560 return getCompareTy(pred, C1, C2);
1563 Constant *ConstantExpr::getSelectTy(const Type *ReqTy, Constant *C,
1564 Constant *V1, Constant *V2) {
1565 assert(!SelectInst::areInvalidOperands(C, V1, V2)&&"Invalid select operands");
1567 if (ReqTy == V1->getType())
1568 if (Constant *SC = ConstantFoldSelectInstruction(C, V1, V2))
1569 return SC; // Fold common cases
1571 std::vector<Constant*> argVec(3, C);
1574 ExprMapKeyType Key(Instruction::Select, argVec);
1576 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1577 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1580 Constant *ConstantExpr::getGetElementPtrTy(const Type *ReqTy, Constant *C,
1583 assert(GetElementPtrInst::getIndexedType(C->getType(), Idxs,
1585 cast<PointerType>(ReqTy)->getElementType() &&
1586 "GEP indices invalid!");
1588 if (Constant *FC = ConstantFoldGetElementPtr(C, /*inBounds=*/false,
1589 (Constant**)Idxs, NumIdx))
1590 return FC; // Fold a few common cases...
1592 assert(C->getType()->isPointerTy() &&
1593 "Non-pointer type for constant GetElementPtr expression");
1594 // Look up the constant in the table first to ensure uniqueness
1595 std::vector<Constant*> ArgVec;
1596 ArgVec.reserve(NumIdx+1);
1597 ArgVec.push_back(C);
1598 for (unsigned i = 0; i != NumIdx; ++i)
1599 ArgVec.push_back(cast<Constant>(Idxs[i]));
1600 const ExprMapKeyType Key(Instruction::GetElementPtr, ArgVec);
1602 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1603 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1606 Constant *ConstantExpr::getInBoundsGetElementPtrTy(const Type *ReqTy,
1610 assert(GetElementPtrInst::getIndexedType(C->getType(), Idxs,
1612 cast<PointerType>(ReqTy)->getElementType() &&
1613 "GEP indices invalid!");
1615 if (Constant *FC = ConstantFoldGetElementPtr(C, /*inBounds=*/true,
1616 (Constant**)Idxs, NumIdx))
1617 return FC; // Fold a few common cases...
1619 assert(C->getType()->isPointerTy() &&
1620 "Non-pointer type for constant GetElementPtr expression");
1621 // Look up the constant in the table first to ensure uniqueness
1622 std::vector<Constant*> ArgVec;
1623 ArgVec.reserve(NumIdx+1);
1624 ArgVec.push_back(C);
1625 for (unsigned i = 0; i != NumIdx; ++i)
1626 ArgVec.push_back(cast<Constant>(Idxs[i]));
1627 const ExprMapKeyType Key(Instruction::GetElementPtr, ArgVec, 0,
1628 GEPOperator::IsInBounds);
1630 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1631 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1634 Constant *ConstantExpr::getGetElementPtr(Constant *C, Value* const *Idxs,
1636 // Get the result type of the getelementptr!
1638 GetElementPtrInst::getIndexedType(C->getType(), Idxs, Idxs+NumIdx);
1639 assert(Ty && "GEP indices invalid!");
1640 unsigned As = cast<PointerType>(C->getType())->getAddressSpace();
1641 return getGetElementPtrTy(PointerType::get(Ty, As), C, Idxs, NumIdx);
1644 Constant *ConstantExpr::getInBoundsGetElementPtr(Constant *C,
1647 // Get the result type of the getelementptr!
1649 GetElementPtrInst::getIndexedType(C->getType(), Idxs, Idxs+NumIdx);
1650 assert(Ty && "GEP indices invalid!");
1651 unsigned As = cast<PointerType>(C->getType())->getAddressSpace();
1652 return getInBoundsGetElementPtrTy(PointerType::get(Ty, As), C, Idxs, NumIdx);
1655 Constant *ConstantExpr::getGetElementPtr(Constant *C, Constant* const *Idxs,
1657 return getGetElementPtr(C, (Value* const *)Idxs, NumIdx);
1660 Constant *ConstantExpr::getInBoundsGetElementPtr(Constant *C,
1661 Constant* const *Idxs,
1663 return getInBoundsGetElementPtr(C, (Value* const *)Idxs, NumIdx);
1667 ConstantExpr::getICmp(unsigned short pred, Constant *LHS, Constant *RHS) {
1668 assert(LHS->getType() == RHS->getType());
1669 assert(pred >= ICmpInst::FIRST_ICMP_PREDICATE &&
1670 pred <= ICmpInst::LAST_ICMP_PREDICATE && "Invalid ICmp Predicate");
1672 if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
1673 return FC; // Fold a few common cases...
1675 // Look up the constant in the table first to ensure uniqueness
1676 std::vector<Constant*> ArgVec;
1677 ArgVec.push_back(LHS);
1678 ArgVec.push_back(RHS);
1679 // Get the key type with both the opcode and predicate
1680 const ExprMapKeyType Key(Instruction::ICmp, ArgVec, pred);
1682 const Type *ResultTy = Type::getInt1Ty(LHS->getContext());
1683 if (const VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
1684 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
1686 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
1687 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
1691 ConstantExpr::getFCmp(unsigned short pred, Constant *LHS, Constant *RHS) {
1692 assert(LHS->getType() == RHS->getType());
1693 assert(pred <= FCmpInst::LAST_FCMP_PREDICATE && "Invalid FCmp Predicate");
1695 if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
1696 return FC; // Fold a few common cases...
1698 // Look up the constant in the table first to ensure uniqueness
1699 std::vector<Constant*> ArgVec;
1700 ArgVec.push_back(LHS);
1701 ArgVec.push_back(RHS);
1702 // Get the key type with both the opcode and predicate
1703 const ExprMapKeyType Key(Instruction::FCmp, ArgVec, pred);
1705 const Type *ResultTy = Type::getInt1Ty(LHS->getContext());
1706 if (const VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
1707 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
1709 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
1710 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
1713 Constant *ConstantExpr::getExtractElementTy(const Type *ReqTy, Constant *Val,
1715 if (Constant *FC = ConstantFoldExtractElementInstruction(Val, Idx))
1716 return FC; // Fold a few common cases.
1717 // Look up the constant in the table first to ensure uniqueness
1718 std::vector<Constant*> ArgVec(1, Val);
1719 ArgVec.push_back(Idx);
1720 const ExprMapKeyType Key(Instruction::ExtractElement,ArgVec);
1722 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1723 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1726 Constant *ConstantExpr::getExtractElement(Constant *Val, Constant *Idx) {
1727 assert(Val->getType()->isVectorTy() &&
1728 "Tried to create extractelement operation on non-vector type!");
1729 assert(Idx->getType()->isIntegerTy(32) &&
1730 "Extractelement index must be i32 type!");
1731 return getExtractElementTy(cast<VectorType>(Val->getType())->getElementType(),
1735 Constant *ConstantExpr::getInsertElementTy(const Type *ReqTy, Constant *Val,
1736 Constant *Elt, Constant *Idx) {
1737 if (Constant *FC = ConstantFoldInsertElementInstruction(Val, Elt, Idx))
1738 return FC; // Fold a few common cases.
1739 // Look up the constant in the table first to ensure uniqueness
1740 std::vector<Constant*> ArgVec(1, Val);
1741 ArgVec.push_back(Elt);
1742 ArgVec.push_back(Idx);
1743 const ExprMapKeyType Key(Instruction::InsertElement,ArgVec);
1745 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1746 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1749 Constant *ConstantExpr::getInsertElement(Constant *Val, Constant *Elt,
1751 assert(Val->getType()->isVectorTy() &&
1752 "Tried to create insertelement operation on non-vector type!");
1753 assert(Elt->getType() == cast<VectorType>(Val->getType())->getElementType()
1754 && "Insertelement types must match!");
1755 assert(Idx->getType()->isIntegerTy(32) &&
1756 "Insertelement index must be i32 type!");
1757 return getInsertElementTy(Val->getType(), Val, Elt, Idx);
1760 Constant *ConstantExpr::getShuffleVectorTy(const Type *ReqTy, Constant *V1,
1761 Constant *V2, Constant *Mask) {
1762 if (Constant *FC = ConstantFoldShuffleVectorInstruction(V1, V2, Mask))
1763 return FC; // Fold a few common cases...
1764 // Look up the constant in the table first to ensure uniqueness
1765 std::vector<Constant*> ArgVec(1, V1);
1766 ArgVec.push_back(V2);
1767 ArgVec.push_back(Mask);
1768 const ExprMapKeyType Key(Instruction::ShuffleVector,ArgVec);
1770 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1771 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1774 Constant *ConstantExpr::getShuffleVector(Constant *V1, Constant *V2,
1776 assert(ShuffleVectorInst::isValidOperands(V1, V2, Mask) &&
1777 "Invalid shuffle vector constant expr operands!");
1779 unsigned NElts = cast<VectorType>(Mask->getType())->getNumElements();
1780 const Type *EltTy = cast<VectorType>(V1->getType())->getElementType();
1781 const Type *ShufTy = VectorType::get(EltTy, NElts);
1782 return getShuffleVectorTy(ShufTy, V1, V2, Mask);
1785 Constant *ConstantExpr::getInsertValueTy(const Type *ReqTy, Constant *Agg,
1787 const unsigned *Idxs, unsigned NumIdx) {
1788 assert(ExtractValueInst::getIndexedType(Agg->getType(), Idxs,
1789 Idxs+NumIdx) == Val->getType() &&
1790 "insertvalue indices invalid!");
1791 assert(Agg->getType() == ReqTy &&
1792 "insertvalue type invalid!");
1793 assert(Agg->getType()->isFirstClassType() &&
1794 "Non-first-class type for constant InsertValue expression");
1795 Constant *FC = ConstantFoldInsertValueInstruction(Agg, Val, Idxs, NumIdx);
1796 assert(FC && "InsertValue constant expr couldn't be folded!");
1800 Constant *ConstantExpr::getInsertValue(Constant *Agg, Constant *Val,
1801 const unsigned *IdxList, unsigned NumIdx) {
1802 assert(Agg->getType()->isFirstClassType() &&
1803 "Tried to create insertelement operation on non-first-class type!");
1805 const Type *ReqTy = Agg->getType();
1808 ExtractValueInst::getIndexedType(Agg->getType(), IdxList, IdxList+NumIdx);
1810 assert(ValTy == Val->getType() && "insertvalue indices invalid!");
1811 return getInsertValueTy(ReqTy, Agg, Val, IdxList, NumIdx);
1814 Constant *ConstantExpr::getExtractValueTy(const Type *ReqTy, Constant *Agg,
1815 const unsigned *Idxs, unsigned NumIdx) {
1816 assert(ExtractValueInst::getIndexedType(Agg->getType(), Idxs,
1817 Idxs+NumIdx) == ReqTy &&
1818 "extractvalue indices invalid!");
1819 assert(Agg->getType()->isFirstClassType() &&
1820 "Non-first-class type for constant extractvalue expression");
1821 Constant *FC = ConstantFoldExtractValueInstruction(Agg, Idxs, NumIdx);
1822 assert(FC && "ExtractValue constant expr couldn't be folded!");
1826 Constant *ConstantExpr::getExtractValue(Constant *Agg,
1827 const unsigned *IdxList, unsigned NumIdx) {
1828 assert(Agg->getType()->isFirstClassType() &&
1829 "Tried to create extractelement operation on non-first-class type!");
1832 ExtractValueInst::getIndexedType(Agg->getType(), IdxList, IdxList+NumIdx);
1833 assert(ReqTy && "extractvalue indices invalid!");
1834 return getExtractValueTy(ReqTy, Agg, IdxList, NumIdx);
1837 Constant* ConstantExpr::getNeg(Constant* C) {
1838 assert(C->getType()->isIntOrIntVectorTy() &&
1839 "Cannot NEG a nonintegral value!");
1840 return get(Instruction::Sub,
1841 ConstantFP::getZeroValueForNegation(C->getType()),
1845 Constant* ConstantExpr::getFNeg(Constant* C) {
1846 assert(C->getType()->isFPOrFPVectorTy() &&
1847 "Cannot FNEG a non-floating-point value!");
1848 return get(Instruction::FSub,
1849 ConstantFP::getZeroValueForNegation(C->getType()),
1853 Constant* ConstantExpr::getNot(Constant* C) {
1854 assert(C->getType()->isIntOrIntVectorTy() &&
1855 "Cannot NOT a nonintegral value!");
1856 return get(Instruction::Xor, C, Constant::getAllOnesValue(C->getType()));
1859 Constant* ConstantExpr::getAdd(Constant* C1, Constant* C2) {
1860 return get(Instruction::Add, C1, C2);
1863 Constant* ConstantExpr::getFAdd(Constant* C1, Constant* C2) {
1864 return get(Instruction::FAdd, C1, C2);
1867 Constant* ConstantExpr::getSub(Constant* C1, Constant* C2) {
1868 return get(Instruction::Sub, C1, C2);
1871 Constant* ConstantExpr::getFSub(Constant* C1, Constant* C2) {
1872 return get(Instruction::FSub, C1, C2);
1875 Constant* ConstantExpr::getMul(Constant* C1, Constant* C2) {
1876 return get(Instruction::Mul, C1, C2);
1879 Constant* ConstantExpr::getFMul(Constant* C1, Constant* C2) {
1880 return get(Instruction::FMul, C1, C2);
1883 Constant* ConstantExpr::getUDiv(Constant* C1, Constant* C2) {
1884 return get(Instruction::UDiv, C1, C2);
1887 Constant* ConstantExpr::getSDiv(Constant* C1, Constant* C2) {
1888 return get(Instruction::SDiv, C1, C2);
1891 Constant* ConstantExpr::getFDiv(Constant* C1, Constant* C2) {
1892 return get(Instruction::FDiv, C1, C2);
1895 Constant* ConstantExpr::getURem(Constant* C1, Constant* C2) {
1896 return get(Instruction::URem, C1, C2);
1899 Constant* ConstantExpr::getSRem(Constant* C1, Constant* C2) {
1900 return get(Instruction::SRem, C1, C2);
1903 Constant* ConstantExpr::getFRem(Constant* C1, Constant* C2) {
1904 return get(Instruction::FRem, C1, C2);
1907 Constant* ConstantExpr::getAnd(Constant* C1, Constant* C2) {
1908 return get(Instruction::And, C1, C2);
1911 Constant* ConstantExpr::getOr(Constant* C1, Constant* C2) {
1912 return get(Instruction::Or, C1, C2);
1915 Constant* ConstantExpr::getXor(Constant* C1, Constant* C2) {
1916 return get(Instruction::Xor, C1, C2);
1919 Constant* ConstantExpr::getShl(Constant* C1, Constant* C2) {
1920 return get(Instruction::Shl, C1, C2);
1923 Constant* ConstantExpr::getLShr(Constant* C1, Constant* C2) {
1924 return get(Instruction::LShr, C1, C2);
1927 Constant* ConstantExpr::getAShr(Constant* C1, Constant* C2) {
1928 return get(Instruction::AShr, C1, C2);
1931 // destroyConstant - Remove the constant from the constant table...
1933 void ConstantExpr::destroyConstant() {
1934 getRawType()->getContext().pImpl->ExprConstants.remove(this);
1935 destroyConstantImpl();
1938 const char *ConstantExpr::getOpcodeName() const {
1939 return Instruction::getOpcodeName(getOpcode());
1944 GetElementPtrConstantExpr::
1945 GetElementPtrConstantExpr(Constant *C, const std::vector<Constant*> &IdxList,
1947 : ConstantExpr(DestTy, Instruction::GetElementPtr,
1948 OperandTraits<GetElementPtrConstantExpr>::op_end(this)
1949 - (IdxList.size()+1), IdxList.size()+1) {
1951 for (unsigned i = 0, E = IdxList.size(); i != E; ++i)
1952 OperandList[i+1] = IdxList[i];
1956 //===----------------------------------------------------------------------===//
1957 // replaceUsesOfWithOnConstant implementations
1959 /// replaceUsesOfWithOnConstant - Update this constant array to change uses of
1960 /// 'From' to be uses of 'To'. This must update the uniquing data structures
1963 /// Note that we intentionally replace all uses of From with To here. Consider
1964 /// a large array that uses 'From' 1000 times. By handling this case all here,
1965 /// ConstantArray::replaceUsesOfWithOnConstant is only invoked once, and that
1966 /// single invocation handles all 1000 uses. Handling them one at a time would
1967 /// work, but would be really slow because it would have to unique each updated
1970 void ConstantArray::replaceUsesOfWithOnConstant(Value *From, Value *To,
1972 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
1973 Constant *ToC = cast<Constant>(To);
1975 LLVMContextImpl *pImpl = getRawType()->getContext().pImpl;
1977 std::pair<LLVMContextImpl::ArrayConstantsTy::MapKey, ConstantArray*> Lookup;
1978 Lookup.first.first = cast<ArrayType>(getRawType());
1979 Lookup.second = this;
1981 std::vector<Constant*> &Values = Lookup.first.second;
1982 Values.reserve(getNumOperands()); // Build replacement array.
1984 // Fill values with the modified operands of the constant array. Also,
1985 // compute whether this turns into an all-zeros array.
1986 bool isAllZeros = false;
1987 unsigned NumUpdated = 0;
1988 if (!ToC->isNullValue()) {
1989 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
1990 Constant *Val = cast<Constant>(O->get());
1995 Values.push_back(Val);
1999 for (Use *O = OperandList, *E = OperandList+getNumOperands();O != E; ++O) {
2000 Constant *Val = cast<Constant>(O->get());
2005 Values.push_back(Val);
2006 if (isAllZeros) isAllZeros = Val->isNullValue();
2010 Constant *Replacement = 0;
2012 Replacement = ConstantAggregateZero::get(getRawType());
2014 // Check to see if we have this array type already.
2016 LLVMContextImpl::ArrayConstantsTy::MapTy::iterator I =
2017 pImpl->ArrayConstants.InsertOrGetItem(Lookup, Exists);
2020 Replacement = I->second;
2022 // Okay, the new shape doesn't exist in the system yet. Instead of
2023 // creating a new constant array, inserting it, replaceallusesof'ing the
2024 // old with the new, then deleting the old... just update the current one
2026 pImpl->ArrayConstants.MoveConstantToNewSlot(this, I);
2028 // Update to the new value. Optimize for the case when we have a single
2029 // operand that we're changing, but handle bulk updates efficiently.
2030 if (NumUpdated == 1) {
2031 unsigned OperandToUpdate = U - OperandList;
2032 assert(getOperand(OperandToUpdate) == From &&
2033 "ReplaceAllUsesWith broken!");
2034 setOperand(OperandToUpdate, ToC);
2036 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
2037 if (getOperand(i) == From)
2044 // Otherwise, I do need to replace this with an existing value.
2045 assert(Replacement != this && "I didn't contain From!");
2047 // Everyone using this now uses the replacement.
2048 uncheckedReplaceAllUsesWith(Replacement);
2050 // Delete the old constant!
2054 void ConstantStruct::replaceUsesOfWithOnConstant(Value *From, Value *To,
2056 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2057 Constant *ToC = cast<Constant>(To);
2059 unsigned OperandToUpdate = U-OperandList;
2060 assert(getOperand(OperandToUpdate) == From && "ReplaceAllUsesWith broken!");
2062 std::pair<LLVMContextImpl::StructConstantsTy::MapKey, ConstantStruct*> Lookup;
2063 Lookup.first.first = cast<StructType>(getRawType());
2064 Lookup.second = this;
2065 std::vector<Constant*> &Values = Lookup.first.second;
2066 Values.reserve(getNumOperands()); // Build replacement struct.
2069 // Fill values with the modified operands of the constant struct. Also,
2070 // compute whether this turns into an all-zeros struct.
2071 bool isAllZeros = false;
2072 if (!ToC->isNullValue()) {
2073 for (Use *O = OperandList, *E = OperandList + getNumOperands(); O != E; ++O)
2074 Values.push_back(cast<Constant>(O->get()));
2077 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2078 Constant *Val = cast<Constant>(O->get());
2079 Values.push_back(Val);
2080 if (isAllZeros) isAllZeros = Val->isNullValue();
2083 Values[OperandToUpdate] = ToC;
2085 LLVMContextImpl *pImpl = getRawType()->getContext().pImpl;
2087 Constant *Replacement = 0;
2089 Replacement = ConstantAggregateZero::get(getRawType());
2091 // Check to see if we have this struct type already.
2093 LLVMContextImpl::StructConstantsTy::MapTy::iterator I =
2094 pImpl->StructConstants.InsertOrGetItem(Lookup, Exists);
2097 Replacement = I->second;
2099 // Okay, the new shape doesn't exist in the system yet. Instead of
2100 // creating a new constant struct, inserting it, replaceallusesof'ing the
2101 // old with the new, then deleting the old... just update the current one
2103 pImpl->StructConstants.MoveConstantToNewSlot(this, I);
2105 // Update to the new value.
2106 setOperand(OperandToUpdate, ToC);
2111 assert(Replacement != this && "I didn't contain From!");
2113 // Everyone using this now uses the replacement.
2114 uncheckedReplaceAllUsesWith(Replacement);
2116 // Delete the old constant!
2120 void ConstantUnion::replaceUsesOfWithOnConstant(Value *From, Value *To,
2122 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2123 Constant *ToC = cast<Constant>(To);
2125 assert(U == OperandList && "Union constants can only have one use!");
2126 assert(getNumOperands() == 1 && "Union constants can only have one use!");
2127 assert(getOperand(0) == From && "ReplaceAllUsesWith broken!");
2129 std::pair<LLVMContextImpl::UnionConstantsTy::MapKey, ConstantUnion*> Lookup;
2130 Lookup.first.first = cast<UnionType>(getRawType());
2131 Lookup.second = this;
2132 Lookup.first.second = ToC;
2134 LLVMContextImpl *pImpl = getRawType()->getContext().pImpl;
2136 Constant *Replacement = 0;
2137 if (ToC->isNullValue()) {
2138 Replacement = ConstantAggregateZero::get(getRawType());
2140 // Check to see if we have this union type already.
2142 LLVMContextImpl::UnionConstantsTy::MapTy::iterator I =
2143 pImpl->UnionConstants.InsertOrGetItem(Lookup, Exists);
2146 Replacement = I->second;
2148 // Okay, the new shape doesn't exist in the system yet. Instead of
2149 // creating a new constant union, inserting it, replaceallusesof'ing the
2150 // old with the new, then deleting the old... just update the current one
2152 pImpl->UnionConstants.MoveConstantToNewSlot(this, I);
2154 // Update to the new value.
2160 assert(Replacement != this && "I didn't contain From!");
2162 // Everyone using this now uses the replacement.
2163 uncheckedReplaceAllUsesWith(Replacement);
2165 // Delete the old constant!
2169 void ConstantVector::replaceUsesOfWithOnConstant(Value *From, Value *To,
2171 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2173 std::vector<Constant*> Values;
2174 Values.reserve(getNumOperands()); // Build replacement array...
2175 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
2176 Constant *Val = getOperand(i);
2177 if (Val == From) Val = cast<Constant>(To);
2178 Values.push_back(Val);
2181 Constant *Replacement = get(cast<VectorType>(getRawType()), Values);
2182 assert(Replacement != this && "I didn't contain From!");
2184 // Everyone using this now uses the replacement.
2185 uncheckedReplaceAllUsesWith(Replacement);
2187 // Delete the old constant!
2191 void ConstantExpr::replaceUsesOfWithOnConstant(Value *From, Value *ToV,
2193 assert(isa<Constant>(ToV) && "Cannot make Constant refer to non-constant!");
2194 Constant *To = cast<Constant>(ToV);
2196 Constant *Replacement = 0;
2197 if (getOpcode() == Instruction::GetElementPtr) {
2198 SmallVector<Constant*, 8> Indices;
2199 Constant *Pointer = getOperand(0);
2200 Indices.reserve(getNumOperands()-1);
2201 if (Pointer == From) Pointer = To;
2203 for (unsigned i = 1, e = getNumOperands(); i != e; ++i) {
2204 Constant *Val = getOperand(i);
2205 if (Val == From) Val = To;
2206 Indices.push_back(Val);
2208 Replacement = ConstantExpr::getGetElementPtr(Pointer,
2209 &Indices[0], Indices.size());
2210 } else if (getOpcode() == Instruction::ExtractValue) {
2211 Constant *Agg = getOperand(0);
2212 if (Agg == From) Agg = To;
2214 const SmallVector<unsigned, 4> &Indices = getIndices();
2215 Replacement = ConstantExpr::getExtractValue(Agg,
2216 &Indices[0], Indices.size());
2217 } else if (getOpcode() == Instruction::InsertValue) {
2218 Constant *Agg = getOperand(0);
2219 Constant *Val = getOperand(1);
2220 if (Agg == From) Agg = To;
2221 if (Val == From) Val = To;
2223 const SmallVector<unsigned, 4> &Indices = getIndices();
2224 Replacement = ConstantExpr::getInsertValue(Agg, Val,
2225 &Indices[0], Indices.size());
2226 } else if (isCast()) {
2227 assert(getOperand(0) == From && "Cast only has one use!");
2228 Replacement = ConstantExpr::getCast(getOpcode(), To, getRawType());
2229 } else if (getOpcode() == Instruction::Select) {
2230 Constant *C1 = getOperand(0);
2231 Constant *C2 = getOperand(1);
2232 Constant *C3 = getOperand(2);
2233 if (C1 == From) C1 = To;
2234 if (C2 == From) C2 = To;
2235 if (C3 == From) C3 = To;
2236 Replacement = ConstantExpr::getSelect(C1, C2, C3);
2237 } else if (getOpcode() == Instruction::ExtractElement) {
2238 Constant *C1 = getOperand(0);
2239 Constant *C2 = getOperand(1);
2240 if (C1 == From) C1 = To;
2241 if (C2 == From) C2 = To;
2242 Replacement = ConstantExpr::getExtractElement(C1, C2);
2243 } else if (getOpcode() == Instruction::InsertElement) {
2244 Constant *C1 = getOperand(0);
2245 Constant *C2 = getOperand(1);
2246 Constant *C3 = getOperand(1);
2247 if (C1 == From) C1 = To;
2248 if (C2 == From) C2 = To;
2249 if (C3 == From) C3 = To;
2250 Replacement = ConstantExpr::getInsertElement(C1, C2, C3);
2251 } else if (getOpcode() == Instruction::ShuffleVector) {
2252 Constant *C1 = getOperand(0);
2253 Constant *C2 = getOperand(1);
2254 Constant *C3 = getOperand(2);
2255 if (C1 == From) C1 = To;
2256 if (C2 == From) C2 = To;
2257 if (C3 == From) C3 = To;
2258 Replacement = ConstantExpr::getShuffleVector(C1, C2, C3);
2259 } else if (isCompare()) {
2260 Constant *C1 = getOperand(0);
2261 Constant *C2 = getOperand(1);
2262 if (C1 == From) C1 = To;
2263 if (C2 == From) C2 = To;
2264 if (getOpcode() == Instruction::ICmp)
2265 Replacement = ConstantExpr::getICmp(getPredicate(), C1, C2);
2267 assert(getOpcode() == Instruction::FCmp);
2268 Replacement = ConstantExpr::getFCmp(getPredicate(), C1, C2);
2270 } else if (getNumOperands() == 2) {
2271 Constant *C1 = getOperand(0);
2272 Constant *C2 = getOperand(1);
2273 if (C1 == From) C1 = To;
2274 if (C2 == From) C2 = To;
2275 Replacement = ConstantExpr::get(getOpcode(), C1, C2, SubclassOptionalData);
2277 llvm_unreachable("Unknown ConstantExpr type!");
2281 assert(Replacement != this && "I didn't contain From!");
2283 // Everyone using this now uses the replacement.
2284 uncheckedReplaceAllUsesWith(Replacement);
2286 // Delete the old constant!