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 for (unsigned i = 0; i < Str.size(); ++i)
530 ElementVals.push_back(ConstantInt::get(Type::getInt8Ty(Context), Str[i]));
532 // Add a null terminator to the string...
534 ElementVals.push_back(ConstantInt::get(Type::getInt8Ty(Context), 0));
537 ArrayType *ATy = ArrayType::get(Type::getInt8Ty(Context), ElementVals.size());
538 return get(ATy, ElementVals);
543 ConstantStruct::ConstantStruct(const StructType *T,
544 const std::vector<Constant*> &V)
545 : Constant(T, ConstantStructVal,
546 OperandTraits<ConstantStruct>::op_end(this) - V.size(),
548 assert(V.size() == T->getNumElements() &&
549 "Invalid initializer vector for constant structure");
550 Use *OL = OperandList;
551 for (std::vector<Constant*>::const_iterator I = V.begin(), E = V.end();
554 assert(C->getType() == T->getElementType(I-V.begin()) &&
555 "Initializer for struct element doesn't match struct element type!");
560 // ConstantStruct accessors.
561 Constant* ConstantStruct::get(const StructType* T,
562 const std::vector<Constant*>& V) {
563 LLVMContextImpl* pImpl = T->getContext().pImpl;
565 // Create a ConstantAggregateZero value if all elements are zeros...
566 for (unsigned i = 0, e = V.size(); i != e; ++i)
567 if (!V[i]->isNullValue())
568 return pImpl->StructConstants.getOrCreate(T, V);
570 return ConstantAggregateZero::get(T);
573 Constant* ConstantStruct::get(LLVMContext &Context,
574 const std::vector<Constant*>& V, bool packed) {
575 std::vector<const Type*> StructEls;
576 StructEls.reserve(V.size());
577 for (unsigned i = 0, e = V.size(); i != e; ++i)
578 StructEls.push_back(V[i]->getType());
579 return get(StructType::get(Context, StructEls, packed), V);
582 Constant* ConstantStruct::get(LLVMContext &Context,
583 Constant* const *Vals, unsigned NumVals,
585 // FIXME: make this the primary ctor method.
586 return get(Context, std::vector<Constant*>(Vals, Vals+NumVals), Packed);
589 ConstantUnion::ConstantUnion(const UnionType *T, Constant* V)
590 : Constant(T, ConstantUnionVal,
591 OperandTraits<ConstantUnion>::op_end(this) - 1, 1) {
592 Use *OL = OperandList;
593 assert(T->getElementTypeIndex(V->getType()) >= 0 &&
594 "Initializer for union element isn't a member of union type!");
598 // ConstantUnion accessors.
599 Constant* ConstantUnion::get(const UnionType* T, Constant* V) {
600 LLVMContextImpl* pImpl = T->getContext().pImpl;
602 // Create a ConstantAggregateZero value if all elements are zeros...
603 if (!V->isNullValue())
604 return pImpl->UnionConstants.getOrCreate(T, V);
606 return ConstantAggregateZero::get(T);
610 ConstantVector::ConstantVector(const VectorType *T,
611 const std::vector<Constant*> &V)
612 : Constant(T, ConstantVectorVal,
613 OperandTraits<ConstantVector>::op_end(this) - V.size(),
615 Use *OL = OperandList;
616 for (std::vector<Constant*>::const_iterator I = V.begin(), E = V.end();
619 assert(C->getType() == T->getElementType() &&
620 "Initializer for vector element doesn't match vector element type!");
625 // ConstantVector accessors.
626 Constant* ConstantVector::get(const VectorType* T,
627 const std::vector<Constant*>& V) {
628 assert(!V.empty() && "Vectors can't be empty");
629 LLVMContext &Context = T->getContext();
630 LLVMContextImpl *pImpl = Context.pImpl;
632 // If this is an all-undef or alll-zero vector, return a
633 // ConstantAggregateZero or UndefValue.
635 bool isZero = C->isNullValue();
636 bool isUndef = isa<UndefValue>(C);
638 if (isZero || isUndef) {
639 for (unsigned i = 1, e = V.size(); i != e; ++i)
641 isZero = isUndef = false;
647 return ConstantAggregateZero::get(T);
649 return UndefValue::get(T);
651 return pImpl->VectorConstants.getOrCreate(T, V);
654 Constant* ConstantVector::get(const std::vector<Constant*>& V) {
655 assert(!V.empty() && "Cannot infer type if V is empty");
656 return get(VectorType::get(V.front()->getType(),V.size()), V);
659 Constant* ConstantVector::get(Constant* const* Vals, unsigned NumVals) {
660 // FIXME: make this the primary ctor method.
661 return get(std::vector<Constant*>(Vals, Vals+NumVals));
664 Constant* ConstantExpr::getNSWNeg(Constant* C) {
665 assert(C->getType()->isIntOrIntVectorTy() &&
666 "Cannot NEG a nonintegral value!");
667 return getNSWSub(ConstantFP::getZeroValueForNegation(C->getType()), C);
670 Constant* ConstantExpr::getNUWNeg(Constant* C) {
671 assert(C->getType()->isIntOrIntVectorTy() &&
672 "Cannot NEG a nonintegral value!");
673 return getNUWSub(ConstantFP::getZeroValueForNegation(C->getType()), C);
676 Constant* ConstantExpr::getNSWAdd(Constant* C1, Constant* C2) {
677 return getTy(C1->getType(), Instruction::Add, C1, C2,
678 OverflowingBinaryOperator::NoSignedWrap);
681 Constant* ConstantExpr::getNUWAdd(Constant* C1, Constant* C2) {
682 return getTy(C1->getType(), Instruction::Add, C1, C2,
683 OverflowingBinaryOperator::NoUnsignedWrap);
686 Constant* ConstantExpr::getNSWSub(Constant* C1, Constant* C2) {
687 return getTy(C1->getType(), Instruction::Sub, C1, C2,
688 OverflowingBinaryOperator::NoSignedWrap);
691 Constant* ConstantExpr::getNUWSub(Constant* C1, Constant* C2) {
692 return getTy(C1->getType(), Instruction::Sub, C1, C2,
693 OverflowingBinaryOperator::NoUnsignedWrap);
696 Constant* ConstantExpr::getNSWMul(Constant* C1, Constant* C2) {
697 return getTy(C1->getType(), Instruction::Mul, C1, C2,
698 OverflowingBinaryOperator::NoSignedWrap);
701 Constant* ConstantExpr::getNUWMul(Constant* C1, Constant* C2) {
702 return getTy(C1->getType(), Instruction::Mul, C1, C2,
703 OverflowingBinaryOperator::NoUnsignedWrap);
706 Constant* ConstantExpr::getExactSDiv(Constant* C1, Constant* C2) {
707 return getTy(C1->getType(), Instruction::SDiv, C1, C2,
708 SDivOperator::IsExact);
711 // Utility function for determining if a ConstantExpr is a CastOp or not. This
712 // can't be inline because we don't want to #include Instruction.h into
714 bool ConstantExpr::isCast() const {
715 return Instruction::isCast(getOpcode());
718 bool ConstantExpr::isCompare() const {
719 return getOpcode() == Instruction::ICmp || getOpcode() == Instruction::FCmp;
722 bool ConstantExpr::isGEPWithNoNotionalOverIndexing() const {
723 if (getOpcode() != Instruction::GetElementPtr) return false;
725 gep_type_iterator GEPI = gep_type_begin(this), E = gep_type_end(this);
726 User::const_op_iterator OI = next(this->op_begin());
728 // Skip the first index, as it has no static limit.
732 // The remaining indices must be compile-time known integers within the
733 // bounds of the corresponding notional static array types.
734 for (; GEPI != E; ++GEPI, ++OI) {
735 ConstantInt *CI = dyn_cast<ConstantInt>(*OI);
736 if (!CI) return false;
737 if (const ArrayType *ATy = dyn_cast<ArrayType>(*GEPI))
738 if (CI->getValue().getActiveBits() > 64 ||
739 CI->getZExtValue() >= ATy->getNumElements())
743 // All the indices checked out.
747 bool ConstantExpr::hasIndices() const {
748 return getOpcode() == Instruction::ExtractValue ||
749 getOpcode() == Instruction::InsertValue;
752 const SmallVector<unsigned, 4> &ConstantExpr::getIndices() const {
753 if (const ExtractValueConstantExpr *EVCE =
754 dyn_cast<ExtractValueConstantExpr>(this))
755 return EVCE->Indices;
757 return cast<InsertValueConstantExpr>(this)->Indices;
760 unsigned ConstantExpr::getPredicate() const {
761 assert(getOpcode() == Instruction::FCmp ||
762 getOpcode() == Instruction::ICmp);
763 return ((const CompareConstantExpr*)this)->predicate;
766 /// getWithOperandReplaced - Return a constant expression identical to this
767 /// one, but with the specified operand set to the specified value.
769 ConstantExpr::getWithOperandReplaced(unsigned OpNo, Constant *Op) const {
770 assert(OpNo < getNumOperands() && "Operand num is out of range!");
771 assert(Op->getType() == getOperand(OpNo)->getType() &&
772 "Replacing operand with value of different type!");
773 if (getOperand(OpNo) == Op)
774 return const_cast<ConstantExpr*>(this);
776 Constant *Op0, *Op1, *Op2;
777 switch (getOpcode()) {
778 case Instruction::Trunc:
779 case Instruction::ZExt:
780 case Instruction::SExt:
781 case Instruction::FPTrunc:
782 case Instruction::FPExt:
783 case Instruction::UIToFP:
784 case Instruction::SIToFP:
785 case Instruction::FPToUI:
786 case Instruction::FPToSI:
787 case Instruction::PtrToInt:
788 case Instruction::IntToPtr:
789 case Instruction::BitCast:
790 return ConstantExpr::getCast(getOpcode(), Op, getType());
791 case Instruction::Select:
792 Op0 = (OpNo == 0) ? Op : getOperand(0);
793 Op1 = (OpNo == 1) ? Op : getOperand(1);
794 Op2 = (OpNo == 2) ? Op : getOperand(2);
795 return ConstantExpr::getSelect(Op0, Op1, Op2);
796 case Instruction::InsertElement:
797 Op0 = (OpNo == 0) ? Op : getOperand(0);
798 Op1 = (OpNo == 1) ? Op : getOperand(1);
799 Op2 = (OpNo == 2) ? Op : getOperand(2);
800 return ConstantExpr::getInsertElement(Op0, Op1, Op2);
801 case Instruction::ExtractElement:
802 Op0 = (OpNo == 0) ? Op : getOperand(0);
803 Op1 = (OpNo == 1) ? Op : getOperand(1);
804 return ConstantExpr::getExtractElement(Op0, Op1);
805 case Instruction::ShuffleVector:
806 Op0 = (OpNo == 0) ? Op : getOperand(0);
807 Op1 = (OpNo == 1) ? Op : getOperand(1);
808 Op2 = (OpNo == 2) ? Op : getOperand(2);
809 return ConstantExpr::getShuffleVector(Op0, Op1, Op2);
810 case Instruction::GetElementPtr: {
811 SmallVector<Constant*, 8> Ops;
812 Ops.resize(getNumOperands()-1);
813 for (unsigned i = 1, e = getNumOperands(); i != e; ++i)
814 Ops[i-1] = getOperand(i);
816 return cast<GEPOperator>(this)->isInBounds() ?
817 ConstantExpr::getInBoundsGetElementPtr(Op, &Ops[0], Ops.size()) :
818 ConstantExpr::getGetElementPtr(Op, &Ops[0], Ops.size());
820 return cast<GEPOperator>(this)->isInBounds() ?
821 ConstantExpr::getInBoundsGetElementPtr(getOperand(0), &Ops[0],Ops.size()):
822 ConstantExpr::getGetElementPtr(getOperand(0), &Ops[0], Ops.size());
825 assert(getNumOperands() == 2 && "Must be binary operator?");
826 Op0 = (OpNo == 0) ? Op : getOperand(0);
827 Op1 = (OpNo == 1) ? Op : getOperand(1);
828 return ConstantExpr::get(getOpcode(), Op0, Op1, SubclassOptionalData);
832 /// getWithOperands - This returns the current constant expression with the
833 /// operands replaced with the specified values. The specified operands must
834 /// match count and type with the existing ones.
835 Constant *ConstantExpr::
836 getWithOperands(Constant* const *Ops, unsigned NumOps) const {
837 assert(NumOps == getNumOperands() && "Operand count mismatch!");
838 bool AnyChange = false;
839 for (unsigned i = 0; i != NumOps; ++i) {
840 assert(Ops[i]->getType() == getOperand(i)->getType() &&
841 "Operand type mismatch!");
842 AnyChange |= Ops[i] != getOperand(i);
844 if (!AnyChange) // No operands changed, return self.
845 return const_cast<ConstantExpr*>(this);
847 switch (getOpcode()) {
848 case Instruction::Trunc:
849 case Instruction::ZExt:
850 case Instruction::SExt:
851 case Instruction::FPTrunc:
852 case Instruction::FPExt:
853 case Instruction::UIToFP:
854 case Instruction::SIToFP:
855 case Instruction::FPToUI:
856 case Instruction::FPToSI:
857 case Instruction::PtrToInt:
858 case Instruction::IntToPtr:
859 case Instruction::BitCast:
860 return ConstantExpr::getCast(getOpcode(), Ops[0], getType());
861 case Instruction::Select:
862 return ConstantExpr::getSelect(Ops[0], Ops[1], Ops[2]);
863 case Instruction::InsertElement:
864 return ConstantExpr::getInsertElement(Ops[0], Ops[1], Ops[2]);
865 case Instruction::ExtractElement:
866 return ConstantExpr::getExtractElement(Ops[0], Ops[1]);
867 case Instruction::ShuffleVector:
868 return ConstantExpr::getShuffleVector(Ops[0], Ops[1], Ops[2]);
869 case Instruction::GetElementPtr:
870 return cast<GEPOperator>(this)->isInBounds() ?
871 ConstantExpr::getInBoundsGetElementPtr(Ops[0], &Ops[1], NumOps-1) :
872 ConstantExpr::getGetElementPtr(Ops[0], &Ops[1], NumOps-1);
873 case Instruction::ICmp:
874 case Instruction::FCmp:
875 return ConstantExpr::getCompare(getPredicate(), Ops[0], Ops[1]);
877 assert(getNumOperands() == 2 && "Must be binary operator?");
878 return ConstantExpr::get(getOpcode(), Ops[0], Ops[1], SubclassOptionalData);
883 //===----------------------------------------------------------------------===//
884 // isValueValidForType implementations
886 bool ConstantInt::isValueValidForType(const Type *Ty, uint64_t Val) {
887 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth(); // assert okay
888 if (Ty == Type::getInt1Ty(Ty->getContext()))
889 return Val == 0 || Val == 1;
891 return true; // always true, has to fit in largest type
892 uint64_t Max = (1ll << NumBits) - 1;
896 bool ConstantInt::isValueValidForType(const Type *Ty, int64_t Val) {
897 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth(); // assert okay
898 if (Ty == Type::getInt1Ty(Ty->getContext()))
899 return Val == 0 || Val == 1 || Val == -1;
901 return true; // always true, has to fit in largest type
902 int64_t Min = -(1ll << (NumBits-1));
903 int64_t Max = (1ll << (NumBits-1)) - 1;
904 return (Val >= Min && Val <= Max);
907 bool ConstantFP::isValueValidForType(const Type *Ty, const APFloat& Val) {
908 // convert modifies in place, so make a copy.
909 APFloat Val2 = APFloat(Val);
911 switch (Ty->getTypeID()) {
913 return false; // These can't be represented as floating point!
915 // FIXME rounding mode needs to be more flexible
916 case Type::FloatTyID: {
917 if (&Val2.getSemantics() == &APFloat::IEEEsingle)
919 Val2.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, &losesInfo);
922 case Type::DoubleTyID: {
923 if (&Val2.getSemantics() == &APFloat::IEEEsingle ||
924 &Val2.getSemantics() == &APFloat::IEEEdouble)
926 Val2.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &losesInfo);
929 case Type::X86_FP80TyID:
930 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
931 &Val2.getSemantics() == &APFloat::IEEEdouble ||
932 &Val2.getSemantics() == &APFloat::x87DoubleExtended;
933 case Type::FP128TyID:
934 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
935 &Val2.getSemantics() == &APFloat::IEEEdouble ||
936 &Val2.getSemantics() == &APFloat::IEEEquad;
937 case Type::PPC_FP128TyID:
938 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
939 &Val2.getSemantics() == &APFloat::IEEEdouble ||
940 &Val2.getSemantics() == &APFloat::PPCDoubleDouble;
944 //===----------------------------------------------------------------------===//
945 // Factory Function Implementation
947 ConstantAggregateZero* ConstantAggregateZero::get(const Type* Ty) {
948 assert((Ty->isStructTy() || Ty->isUnionTy()
949 || Ty->isArrayTy() || Ty->isVectorTy()) &&
950 "Cannot create an aggregate zero of non-aggregate type!");
952 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
953 return pImpl->AggZeroConstants.getOrCreate(Ty, 0);
956 /// destroyConstant - Remove the constant from the constant table...
958 void ConstantAggregateZero::destroyConstant() {
959 getType()->getContext().pImpl->AggZeroConstants.remove(this);
960 destroyConstantImpl();
963 /// destroyConstant - Remove the constant from the constant table...
965 void ConstantArray::destroyConstant() {
966 getType()->getContext().pImpl->ArrayConstants.remove(this);
967 destroyConstantImpl();
970 /// isString - This method returns true if the array is an array of i8, and
971 /// if the elements of the array are all ConstantInt's.
972 bool ConstantArray::isString() const {
973 // Check the element type for i8...
974 if (!getType()->getElementType()->isIntegerTy(8))
976 // Check the elements to make sure they are all integers, not constant
978 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
979 if (!isa<ConstantInt>(getOperand(i)))
984 /// isCString - This method returns true if the array is a string (see
985 /// isString) and it ends in a null byte \\0 and does not contains any other
986 /// null bytes except its terminator.
987 bool ConstantArray::isCString() const {
988 // Check the element type for i8...
989 if (!getType()->getElementType()->isIntegerTy(8))
992 // Last element must be a null.
993 if (!getOperand(getNumOperands()-1)->isNullValue())
995 // Other elements must be non-null integers.
996 for (unsigned i = 0, e = getNumOperands()-1; i != e; ++i) {
997 if (!isa<ConstantInt>(getOperand(i)))
999 if (getOperand(i)->isNullValue())
1006 /// getAsString - If the sub-element type of this array is i8
1007 /// then this method converts the array to an std::string and returns it.
1008 /// Otherwise, it asserts out.
1010 std::string ConstantArray::getAsString() const {
1011 assert(isString() && "Not a string!");
1013 Result.reserve(getNumOperands());
1014 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
1015 Result.push_back((char)cast<ConstantInt>(getOperand(i))->getZExtValue());
1020 //---- ConstantStruct::get() implementation...
1027 // destroyConstant - Remove the constant from the constant table...
1029 void ConstantStruct::destroyConstant() {
1030 getType()->getContext().pImpl->StructConstants.remove(this);
1031 destroyConstantImpl();
1034 // destroyConstant - Remove the constant from the constant table...
1036 void ConstantUnion::destroyConstant() {
1037 getType()->getContext().pImpl->UnionConstants.remove(this);
1038 destroyConstantImpl();
1041 // destroyConstant - Remove the constant from the constant table...
1043 void ConstantVector::destroyConstant() {
1044 getType()->getContext().pImpl->VectorConstants.remove(this);
1045 destroyConstantImpl();
1048 /// This function will return true iff every element in this vector constant
1049 /// is set to all ones.
1050 /// @returns true iff this constant's emements are all set to all ones.
1051 /// @brief Determine if the value is all ones.
1052 bool ConstantVector::isAllOnesValue() const {
1053 // Check out first element.
1054 const Constant *Elt = getOperand(0);
1055 const ConstantInt *CI = dyn_cast<ConstantInt>(Elt);
1056 if (!CI || !CI->isAllOnesValue()) return false;
1057 // Then make sure all remaining elements point to the same value.
1058 for (unsigned I = 1, E = getNumOperands(); I < E; ++I) {
1059 if (getOperand(I) != Elt) return false;
1064 /// getSplatValue - If this is a splat constant, where all of the
1065 /// elements have the same value, return that value. Otherwise return null.
1066 Constant *ConstantVector::getSplatValue() {
1067 // Check out first element.
1068 Constant *Elt = getOperand(0);
1069 // Then make sure all remaining elements point to the same value.
1070 for (unsigned I = 1, E = getNumOperands(); I < E; ++I)
1071 if (getOperand(I) != Elt) return 0;
1075 //---- ConstantPointerNull::get() implementation.
1078 ConstantPointerNull *ConstantPointerNull::get(const PointerType *Ty) {
1079 return Ty->getContext().pImpl->NullPtrConstants.getOrCreate(Ty, 0);
1082 // destroyConstant - Remove the constant from the constant table...
1084 void ConstantPointerNull::destroyConstant() {
1085 getType()->getContext().pImpl->NullPtrConstants.remove(this);
1086 destroyConstantImpl();
1090 //---- UndefValue::get() implementation.
1093 UndefValue *UndefValue::get(const Type *Ty) {
1094 return Ty->getContext().pImpl->UndefValueConstants.getOrCreate(Ty, 0);
1097 // destroyConstant - Remove the constant from the constant table.
1099 void UndefValue::destroyConstant() {
1100 getType()->getContext().pImpl->UndefValueConstants.remove(this);
1101 destroyConstantImpl();
1104 //---- BlockAddress::get() implementation.
1107 BlockAddress *BlockAddress::get(BasicBlock *BB) {
1108 assert(BB->getParent() != 0 && "Block must have a parent");
1109 return get(BB->getParent(), BB);
1112 BlockAddress *BlockAddress::get(Function *F, BasicBlock *BB) {
1114 F->getContext().pImpl->BlockAddresses[std::make_pair(F, BB)];
1116 BA = new BlockAddress(F, BB);
1118 assert(BA->getFunction() == F && "Basic block moved between functions");
1122 BlockAddress::BlockAddress(Function *F, BasicBlock *BB)
1123 : Constant(Type::getInt8PtrTy(F->getContext()), Value::BlockAddressVal,
1127 BB->AdjustBlockAddressRefCount(1);
1131 // destroyConstant - Remove the constant from the constant table.
1133 void BlockAddress::destroyConstant() {
1134 getFunction()->getType()->getContext().pImpl
1135 ->BlockAddresses.erase(std::make_pair(getFunction(), getBasicBlock()));
1136 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1137 destroyConstantImpl();
1140 void BlockAddress::replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) {
1141 // This could be replacing either the Basic Block or the Function. In either
1142 // case, we have to remove the map entry.
1143 Function *NewF = getFunction();
1144 BasicBlock *NewBB = getBasicBlock();
1147 NewF = cast<Function>(To);
1149 NewBB = cast<BasicBlock>(To);
1151 // See if the 'new' entry already exists, if not, just update this in place
1152 // and return early.
1153 BlockAddress *&NewBA =
1154 getContext().pImpl->BlockAddresses[std::make_pair(NewF, NewBB)];
1156 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1158 // Remove the old entry, this can't cause the map to rehash (just a
1159 // tombstone will get added).
1160 getContext().pImpl->BlockAddresses.erase(std::make_pair(getFunction(),
1163 setOperand(0, NewF);
1164 setOperand(1, NewBB);
1165 getBasicBlock()->AdjustBlockAddressRefCount(1);
1169 // Otherwise, I do need to replace this with an existing value.
1170 assert(NewBA != this && "I didn't contain From!");
1172 // Everyone using this now uses the replacement.
1173 uncheckedReplaceAllUsesWith(NewBA);
1178 //---- ConstantExpr::get() implementations.
1181 /// This is a utility function to handle folding of casts and lookup of the
1182 /// cast in the ExprConstants map. It is used by the various get* methods below.
1183 static inline Constant *getFoldedCast(
1184 Instruction::CastOps opc, Constant *C, const Type *Ty) {
1185 assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
1186 // Fold a few common cases
1187 if (Constant *FC = ConstantFoldCastInstruction(opc, C, Ty))
1190 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
1192 // Look up the constant in the table first to ensure uniqueness
1193 std::vector<Constant*> argVec(1, C);
1194 ExprMapKeyType Key(opc, argVec);
1196 return pImpl->ExprConstants.getOrCreate(Ty, Key);
1199 Constant *ConstantExpr::getCast(unsigned oc, Constant *C, const Type *Ty) {
1200 Instruction::CastOps opc = Instruction::CastOps(oc);
1201 assert(Instruction::isCast(opc) && "opcode out of range");
1202 assert(C && Ty && "Null arguments to getCast");
1203 assert(CastInst::castIsValid(opc, C, Ty) && "Invalid constantexpr cast!");
1207 llvm_unreachable("Invalid cast opcode");
1209 case Instruction::Trunc: return getTrunc(C, Ty);
1210 case Instruction::ZExt: return getZExt(C, Ty);
1211 case Instruction::SExt: return getSExt(C, Ty);
1212 case Instruction::FPTrunc: return getFPTrunc(C, Ty);
1213 case Instruction::FPExt: return getFPExtend(C, Ty);
1214 case Instruction::UIToFP: return getUIToFP(C, Ty);
1215 case Instruction::SIToFP: return getSIToFP(C, Ty);
1216 case Instruction::FPToUI: return getFPToUI(C, Ty);
1217 case Instruction::FPToSI: return getFPToSI(C, Ty);
1218 case Instruction::PtrToInt: return getPtrToInt(C, Ty);
1219 case Instruction::IntToPtr: return getIntToPtr(C, Ty);
1220 case Instruction::BitCast: return getBitCast(C, Ty);
1225 Constant *ConstantExpr::getZExtOrBitCast(Constant *C, const Type *Ty) {
1226 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1227 return getBitCast(C, Ty);
1228 return getZExt(C, Ty);
1231 Constant *ConstantExpr::getSExtOrBitCast(Constant *C, const Type *Ty) {
1232 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1233 return getBitCast(C, Ty);
1234 return getSExt(C, Ty);
1237 Constant *ConstantExpr::getTruncOrBitCast(Constant *C, const Type *Ty) {
1238 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1239 return getBitCast(C, Ty);
1240 return getTrunc(C, Ty);
1243 Constant *ConstantExpr::getPointerCast(Constant *S, const Type *Ty) {
1244 assert(S->getType()->isPointerTy() && "Invalid cast");
1245 assert((Ty->isIntegerTy() || Ty->isPointerTy()) && "Invalid cast");
1247 if (Ty->isIntegerTy())
1248 return getPtrToInt(S, Ty);
1249 return getBitCast(S, Ty);
1252 Constant *ConstantExpr::getIntegerCast(Constant *C, const Type *Ty,
1254 assert(C->getType()->isIntOrIntVectorTy() &&
1255 Ty->isIntOrIntVectorTy() && "Invalid cast");
1256 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1257 unsigned DstBits = Ty->getScalarSizeInBits();
1258 Instruction::CastOps opcode =
1259 (SrcBits == DstBits ? Instruction::BitCast :
1260 (SrcBits > DstBits ? Instruction::Trunc :
1261 (isSigned ? Instruction::SExt : Instruction::ZExt)));
1262 return getCast(opcode, C, Ty);
1265 Constant *ConstantExpr::getFPCast(Constant *C, const Type *Ty) {
1266 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1268 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1269 unsigned DstBits = Ty->getScalarSizeInBits();
1270 if (SrcBits == DstBits)
1271 return C; // Avoid a useless cast
1272 Instruction::CastOps opcode =
1273 (SrcBits > DstBits ? Instruction::FPTrunc : Instruction::FPExt);
1274 return getCast(opcode, C, Ty);
1277 Constant *ConstantExpr::getTrunc(Constant *C, const Type *Ty) {
1279 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1280 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1282 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1283 assert(C->getType()->isIntOrIntVectorTy() && "Trunc operand must be integer");
1284 assert(Ty->isIntOrIntVectorTy() && "Trunc produces only integral");
1285 assert(C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1286 "SrcTy must be larger than DestTy for Trunc!");
1288 return getFoldedCast(Instruction::Trunc, C, Ty);
1291 Constant *ConstantExpr::getSExt(Constant *C, const Type *Ty) {
1293 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1294 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1296 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1297 assert(C->getType()->isIntOrIntVectorTy() && "SExt operand must be integral");
1298 assert(Ty->isIntOrIntVectorTy() && "SExt produces only integer");
1299 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1300 "SrcTy must be smaller than DestTy for SExt!");
1302 return getFoldedCast(Instruction::SExt, C, Ty);
1305 Constant *ConstantExpr::getZExt(Constant *C, const Type *Ty) {
1307 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1308 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1310 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1311 assert(C->getType()->isIntOrIntVectorTy() && "ZEXt operand must be integral");
1312 assert(Ty->isIntOrIntVectorTy() && "ZExt produces only integer");
1313 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1314 "SrcTy must be smaller than DestTy for ZExt!");
1316 return getFoldedCast(Instruction::ZExt, C, Ty);
1319 Constant *ConstantExpr::getFPTrunc(Constant *C, const Type *Ty) {
1321 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1322 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1324 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1325 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1326 C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1327 "This is an illegal floating point truncation!");
1328 return getFoldedCast(Instruction::FPTrunc, C, Ty);
1331 Constant *ConstantExpr::getFPExtend(Constant *C, const Type *Ty) {
1333 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1334 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1336 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1337 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1338 C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1339 "This is an illegal floating point extension!");
1340 return getFoldedCast(Instruction::FPExt, C, Ty);
1343 Constant *ConstantExpr::getUIToFP(Constant *C, const Type *Ty) {
1345 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1346 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1348 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1349 assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1350 "This is an illegal uint to floating point cast!");
1351 return getFoldedCast(Instruction::UIToFP, C, Ty);
1354 Constant *ConstantExpr::getSIToFP(Constant *C, const Type *Ty) {
1356 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1357 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1359 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1360 assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1361 "This is an illegal sint to floating point cast!");
1362 return getFoldedCast(Instruction::SIToFP, C, Ty);
1365 Constant *ConstantExpr::getFPToUI(Constant *C, const Type *Ty) {
1367 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1368 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1370 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1371 assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1372 "This is an illegal floating point to uint cast!");
1373 return getFoldedCast(Instruction::FPToUI, C, Ty);
1376 Constant *ConstantExpr::getFPToSI(Constant *C, const Type *Ty) {
1378 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1379 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1381 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1382 assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1383 "This is an illegal floating point to sint cast!");
1384 return getFoldedCast(Instruction::FPToSI, C, Ty);
1387 Constant *ConstantExpr::getPtrToInt(Constant *C, const Type *DstTy) {
1388 assert(C->getType()->isPointerTy() && "PtrToInt source must be pointer");
1389 assert(DstTy->isIntegerTy() && "PtrToInt destination must be integral");
1390 return getFoldedCast(Instruction::PtrToInt, C, DstTy);
1393 Constant *ConstantExpr::getIntToPtr(Constant *C, const Type *DstTy) {
1394 assert(C->getType()->isIntegerTy() && "IntToPtr source must be integral");
1395 assert(DstTy->isPointerTy() && "IntToPtr destination must be a pointer");
1396 return getFoldedCast(Instruction::IntToPtr, C, DstTy);
1399 Constant *ConstantExpr::getBitCast(Constant *C, const Type *DstTy) {
1400 assert(CastInst::castIsValid(Instruction::BitCast, C, DstTy) &&
1401 "Invalid constantexpr bitcast!");
1403 // It is common to ask for a bitcast of a value to its own type, handle this
1405 if (C->getType() == DstTy) return C;
1407 return getFoldedCast(Instruction::BitCast, C, DstTy);
1410 Constant *ConstantExpr::getTy(const Type *ReqTy, unsigned Opcode,
1411 Constant *C1, Constant *C2,
1413 // Check the operands for consistency first
1414 assert(Opcode >= Instruction::BinaryOpsBegin &&
1415 Opcode < Instruction::BinaryOpsEnd &&
1416 "Invalid opcode in binary constant expression");
1417 assert(C1->getType() == C2->getType() &&
1418 "Operand types in binary constant expression should match");
1420 if (ReqTy == C1->getType() || ReqTy == Type::getInt1Ty(ReqTy->getContext()))
1421 if (Constant *FC = ConstantFoldBinaryInstruction(Opcode, C1, C2))
1422 return FC; // Fold a few common cases...
1424 std::vector<Constant*> argVec(1, C1); argVec.push_back(C2);
1425 ExprMapKeyType Key(Opcode, argVec, 0, Flags);
1427 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1428 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1431 Constant *ConstantExpr::getCompareTy(unsigned short predicate,
1432 Constant *C1, Constant *C2) {
1433 switch (predicate) {
1434 default: llvm_unreachable("Invalid CmpInst predicate");
1435 case CmpInst::FCMP_FALSE: case CmpInst::FCMP_OEQ: case CmpInst::FCMP_OGT:
1436 case CmpInst::FCMP_OGE: case CmpInst::FCMP_OLT: case CmpInst::FCMP_OLE:
1437 case CmpInst::FCMP_ONE: case CmpInst::FCMP_ORD: case CmpInst::FCMP_UNO:
1438 case CmpInst::FCMP_UEQ: case CmpInst::FCMP_UGT: case CmpInst::FCMP_UGE:
1439 case CmpInst::FCMP_ULT: case CmpInst::FCMP_ULE: case CmpInst::FCMP_UNE:
1440 case CmpInst::FCMP_TRUE:
1441 return getFCmp(predicate, C1, C2);
1443 case CmpInst::ICMP_EQ: case CmpInst::ICMP_NE: case CmpInst::ICMP_UGT:
1444 case CmpInst::ICMP_UGE: case CmpInst::ICMP_ULT: case CmpInst::ICMP_ULE:
1445 case CmpInst::ICMP_SGT: case CmpInst::ICMP_SGE: case CmpInst::ICMP_SLT:
1446 case CmpInst::ICMP_SLE:
1447 return getICmp(predicate, C1, C2);
1451 Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2,
1455 case Instruction::Add:
1456 case Instruction::Sub:
1457 case Instruction::Mul:
1458 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1459 assert(C1->getType()->isIntOrIntVectorTy() &&
1460 "Tried to create an integer operation on a non-integer type!");
1462 case Instruction::FAdd:
1463 case Instruction::FSub:
1464 case Instruction::FMul:
1465 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1466 assert(C1->getType()->isFPOrFPVectorTy() &&
1467 "Tried to create a floating-point operation on a "
1468 "non-floating-point type!");
1470 case Instruction::UDiv:
1471 case Instruction::SDiv:
1472 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1473 assert(C1->getType()->isIntOrIntVectorTy() &&
1474 "Tried to create an arithmetic operation on a non-arithmetic type!");
1476 case Instruction::FDiv:
1477 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1478 assert(C1->getType()->isFPOrFPVectorTy() &&
1479 "Tried to create an arithmetic operation on a non-arithmetic type!");
1481 case Instruction::URem:
1482 case Instruction::SRem:
1483 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1484 assert(C1->getType()->isIntOrIntVectorTy() &&
1485 "Tried to create an arithmetic operation on a non-arithmetic type!");
1487 case Instruction::FRem:
1488 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1489 assert(C1->getType()->isFPOrFPVectorTy() &&
1490 "Tried to create an arithmetic operation on a non-arithmetic type!");
1492 case Instruction::And:
1493 case Instruction::Or:
1494 case Instruction::Xor:
1495 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1496 assert(C1->getType()->isIntOrIntVectorTy() &&
1497 "Tried to create a logical operation on a non-integral type!");
1499 case Instruction::Shl:
1500 case Instruction::LShr:
1501 case Instruction::AShr:
1502 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1503 assert(C1->getType()->isIntOrIntVectorTy() &&
1504 "Tried to create a shift operation on a non-integer type!");
1511 return getTy(C1->getType(), Opcode, C1, C2, Flags);
1514 Constant* ConstantExpr::getSizeOf(const Type* Ty) {
1515 // sizeof is implemented as: (i64) gep (Ty*)null, 1
1516 // Note that a non-inbounds gep is used, as null isn't within any object.
1517 Constant *GEPIdx = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1518 Constant *GEP = getGetElementPtr(
1519 Constant::getNullValue(PointerType::getUnqual(Ty)), &GEPIdx, 1);
1520 return getPtrToInt(GEP,
1521 Type::getInt64Ty(Ty->getContext()));
1524 Constant* ConstantExpr::getAlignOf(const Type* Ty) {
1525 // alignof is implemented as: (i64) gep ({i1,Ty}*)null, 0, 1
1526 // Note that a non-inbounds gep is used, as null isn't within any object.
1527 const Type *AligningTy = StructType::get(Ty->getContext(),
1528 Type::getInt1Ty(Ty->getContext()), Ty, NULL);
1529 Constant *NullPtr = Constant::getNullValue(AligningTy->getPointerTo());
1530 Constant *Zero = ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0);
1531 Constant *One = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1532 Constant *Indices[2] = { Zero, One };
1533 Constant *GEP = getGetElementPtr(NullPtr, Indices, 2);
1534 return getPtrToInt(GEP,
1535 Type::getInt64Ty(Ty->getContext()));
1538 Constant* ConstantExpr::getOffsetOf(const StructType* STy, unsigned FieldNo) {
1539 return getOffsetOf(STy, ConstantInt::get(Type::getInt32Ty(STy->getContext()),
1543 Constant* ConstantExpr::getOffsetOf(const Type* Ty, Constant *FieldNo) {
1544 // offsetof is implemented as: (i64) gep (Ty*)null, 0, FieldNo
1545 // Note that a non-inbounds gep is used, as null isn't within any object.
1546 Constant *GEPIdx[] = {
1547 ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0),
1550 Constant *GEP = getGetElementPtr(
1551 Constant::getNullValue(PointerType::getUnqual(Ty)), GEPIdx, 2);
1552 return getPtrToInt(GEP,
1553 Type::getInt64Ty(Ty->getContext()));
1556 Constant *ConstantExpr::getCompare(unsigned short pred,
1557 Constant *C1, Constant *C2) {
1558 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1559 return getCompareTy(pred, C1, C2);
1562 Constant *ConstantExpr::getSelectTy(const Type *ReqTy, Constant *C,
1563 Constant *V1, Constant *V2) {
1564 assert(!SelectInst::areInvalidOperands(C, V1, V2)&&"Invalid select operands");
1566 if (ReqTy == V1->getType())
1567 if (Constant *SC = ConstantFoldSelectInstruction(C, V1, V2))
1568 return SC; // Fold common cases
1570 std::vector<Constant*> argVec(3, C);
1573 ExprMapKeyType Key(Instruction::Select, argVec);
1575 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1576 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1579 Constant *ConstantExpr::getGetElementPtrTy(const Type *ReqTy, Constant *C,
1582 assert(GetElementPtrInst::getIndexedType(C->getType(), Idxs,
1584 cast<PointerType>(ReqTy)->getElementType() &&
1585 "GEP indices invalid!");
1587 if (Constant *FC = ConstantFoldGetElementPtr(C, /*inBounds=*/false,
1588 (Constant**)Idxs, NumIdx))
1589 return FC; // Fold a few common cases...
1591 assert(C->getType()->isPointerTy() &&
1592 "Non-pointer type for constant GetElementPtr expression");
1593 // Look up the constant in the table first to ensure uniqueness
1594 std::vector<Constant*> ArgVec;
1595 ArgVec.reserve(NumIdx+1);
1596 ArgVec.push_back(C);
1597 for (unsigned i = 0; i != NumIdx; ++i)
1598 ArgVec.push_back(cast<Constant>(Idxs[i]));
1599 const ExprMapKeyType Key(Instruction::GetElementPtr, ArgVec);
1601 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1602 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1605 Constant *ConstantExpr::getInBoundsGetElementPtrTy(const Type *ReqTy,
1609 assert(GetElementPtrInst::getIndexedType(C->getType(), Idxs,
1611 cast<PointerType>(ReqTy)->getElementType() &&
1612 "GEP indices invalid!");
1614 if (Constant *FC = ConstantFoldGetElementPtr(C, /*inBounds=*/true,
1615 (Constant**)Idxs, NumIdx))
1616 return FC; // Fold a few common cases...
1618 assert(C->getType()->isPointerTy() &&
1619 "Non-pointer type for constant GetElementPtr expression");
1620 // Look up the constant in the table first to ensure uniqueness
1621 std::vector<Constant*> ArgVec;
1622 ArgVec.reserve(NumIdx+1);
1623 ArgVec.push_back(C);
1624 for (unsigned i = 0; i != NumIdx; ++i)
1625 ArgVec.push_back(cast<Constant>(Idxs[i]));
1626 const ExprMapKeyType Key(Instruction::GetElementPtr, ArgVec, 0,
1627 GEPOperator::IsInBounds);
1629 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1630 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1633 Constant *ConstantExpr::getGetElementPtr(Constant *C, Value* const *Idxs,
1635 // Get the result type of the getelementptr!
1637 GetElementPtrInst::getIndexedType(C->getType(), Idxs, Idxs+NumIdx);
1638 assert(Ty && "GEP indices invalid!");
1639 unsigned As = cast<PointerType>(C->getType())->getAddressSpace();
1640 return getGetElementPtrTy(PointerType::get(Ty, As), C, Idxs, NumIdx);
1643 Constant *ConstantExpr::getInBoundsGetElementPtr(Constant *C,
1646 // Get the result type of the getelementptr!
1648 GetElementPtrInst::getIndexedType(C->getType(), Idxs, Idxs+NumIdx);
1649 assert(Ty && "GEP indices invalid!");
1650 unsigned As = cast<PointerType>(C->getType())->getAddressSpace();
1651 return getInBoundsGetElementPtrTy(PointerType::get(Ty, As), C, Idxs, NumIdx);
1654 Constant *ConstantExpr::getGetElementPtr(Constant *C, Constant* const *Idxs,
1656 return getGetElementPtr(C, (Value* const *)Idxs, NumIdx);
1659 Constant *ConstantExpr::getInBoundsGetElementPtr(Constant *C,
1660 Constant* const *Idxs,
1662 return getInBoundsGetElementPtr(C, (Value* const *)Idxs, NumIdx);
1666 ConstantExpr::getICmp(unsigned short pred, Constant *LHS, Constant *RHS) {
1667 assert(LHS->getType() == RHS->getType());
1668 assert(pred >= ICmpInst::FIRST_ICMP_PREDICATE &&
1669 pred <= ICmpInst::LAST_ICMP_PREDICATE && "Invalid ICmp Predicate");
1671 if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
1672 return FC; // Fold a few common cases...
1674 // Look up the constant in the table first to ensure uniqueness
1675 std::vector<Constant*> ArgVec;
1676 ArgVec.push_back(LHS);
1677 ArgVec.push_back(RHS);
1678 // Get the key type with both the opcode and predicate
1679 const ExprMapKeyType Key(Instruction::ICmp, ArgVec, pred);
1681 const Type *ResultTy = Type::getInt1Ty(LHS->getContext());
1682 if (const VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
1683 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
1685 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
1686 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
1690 ConstantExpr::getFCmp(unsigned short pred, Constant *LHS, Constant *RHS) {
1691 assert(LHS->getType() == RHS->getType());
1692 assert(pred <= FCmpInst::LAST_FCMP_PREDICATE && "Invalid FCmp Predicate");
1694 if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
1695 return FC; // Fold a few common cases...
1697 // Look up the constant in the table first to ensure uniqueness
1698 std::vector<Constant*> ArgVec;
1699 ArgVec.push_back(LHS);
1700 ArgVec.push_back(RHS);
1701 // Get the key type with both the opcode and predicate
1702 const ExprMapKeyType Key(Instruction::FCmp, ArgVec, pred);
1704 const Type *ResultTy = Type::getInt1Ty(LHS->getContext());
1705 if (const VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
1706 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
1708 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
1709 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
1712 Constant *ConstantExpr::getExtractElementTy(const Type *ReqTy, Constant *Val,
1714 if (Constant *FC = ConstantFoldExtractElementInstruction(Val, Idx))
1715 return FC; // Fold a few common cases.
1716 // Look up the constant in the table first to ensure uniqueness
1717 std::vector<Constant*> ArgVec(1, Val);
1718 ArgVec.push_back(Idx);
1719 const ExprMapKeyType Key(Instruction::ExtractElement,ArgVec);
1721 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1722 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1725 Constant *ConstantExpr::getExtractElement(Constant *Val, Constant *Idx) {
1726 assert(Val->getType()->isVectorTy() &&
1727 "Tried to create extractelement operation on non-vector type!");
1728 assert(Idx->getType()->isIntegerTy(32) &&
1729 "Extractelement index must be i32 type!");
1730 return getExtractElementTy(cast<VectorType>(Val->getType())->getElementType(),
1734 Constant *ConstantExpr::getInsertElementTy(const Type *ReqTy, Constant *Val,
1735 Constant *Elt, Constant *Idx) {
1736 if (Constant *FC = ConstantFoldInsertElementInstruction(Val, Elt, Idx))
1737 return FC; // Fold a few common cases.
1738 // Look up the constant in the table first to ensure uniqueness
1739 std::vector<Constant*> ArgVec(1, Val);
1740 ArgVec.push_back(Elt);
1741 ArgVec.push_back(Idx);
1742 const ExprMapKeyType Key(Instruction::InsertElement,ArgVec);
1744 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1745 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1748 Constant *ConstantExpr::getInsertElement(Constant *Val, Constant *Elt,
1750 assert(Val->getType()->isVectorTy() &&
1751 "Tried to create insertelement operation on non-vector type!");
1752 assert(Elt->getType() == cast<VectorType>(Val->getType())->getElementType()
1753 && "Insertelement types must match!");
1754 assert(Idx->getType()->isIntegerTy(32) &&
1755 "Insertelement index must be i32 type!");
1756 return getInsertElementTy(Val->getType(), Val, Elt, Idx);
1759 Constant *ConstantExpr::getShuffleVectorTy(const Type *ReqTy, Constant *V1,
1760 Constant *V2, Constant *Mask) {
1761 if (Constant *FC = ConstantFoldShuffleVectorInstruction(V1, V2, Mask))
1762 return FC; // Fold a few common cases...
1763 // Look up the constant in the table first to ensure uniqueness
1764 std::vector<Constant*> ArgVec(1, V1);
1765 ArgVec.push_back(V2);
1766 ArgVec.push_back(Mask);
1767 const ExprMapKeyType Key(Instruction::ShuffleVector,ArgVec);
1769 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1770 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1773 Constant *ConstantExpr::getShuffleVector(Constant *V1, Constant *V2,
1775 assert(ShuffleVectorInst::isValidOperands(V1, V2, Mask) &&
1776 "Invalid shuffle vector constant expr operands!");
1778 unsigned NElts = cast<VectorType>(Mask->getType())->getNumElements();
1779 const Type *EltTy = cast<VectorType>(V1->getType())->getElementType();
1780 const Type *ShufTy = VectorType::get(EltTy, NElts);
1781 return getShuffleVectorTy(ShufTy, V1, V2, Mask);
1784 Constant *ConstantExpr::getInsertValueTy(const Type *ReqTy, Constant *Agg,
1786 const unsigned *Idxs, unsigned NumIdx) {
1787 assert(ExtractValueInst::getIndexedType(Agg->getType(), Idxs,
1788 Idxs+NumIdx) == Val->getType() &&
1789 "insertvalue indices invalid!");
1790 assert(Agg->getType() == ReqTy &&
1791 "insertvalue type invalid!");
1792 assert(Agg->getType()->isFirstClassType() &&
1793 "Non-first-class type for constant InsertValue expression");
1794 Constant *FC = ConstantFoldInsertValueInstruction(Agg, Val, Idxs, NumIdx);
1795 assert(FC && "InsertValue constant expr couldn't be folded!");
1799 Constant *ConstantExpr::getInsertValue(Constant *Agg, Constant *Val,
1800 const unsigned *IdxList, unsigned NumIdx) {
1801 assert(Agg->getType()->isFirstClassType() &&
1802 "Tried to create insertelement operation on non-first-class type!");
1804 const Type *ReqTy = Agg->getType();
1807 ExtractValueInst::getIndexedType(Agg->getType(), IdxList, IdxList+NumIdx);
1809 assert(ValTy == Val->getType() && "insertvalue indices invalid!");
1810 return getInsertValueTy(ReqTy, Agg, Val, IdxList, NumIdx);
1813 Constant *ConstantExpr::getExtractValueTy(const Type *ReqTy, Constant *Agg,
1814 const unsigned *Idxs, unsigned NumIdx) {
1815 assert(ExtractValueInst::getIndexedType(Agg->getType(), Idxs,
1816 Idxs+NumIdx) == ReqTy &&
1817 "extractvalue indices invalid!");
1818 assert(Agg->getType()->isFirstClassType() &&
1819 "Non-first-class type for constant extractvalue expression");
1820 Constant *FC = ConstantFoldExtractValueInstruction(Agg, Idxs, NumIdx);
1821 assert(FC && "ExtractValue constant expr couldn't be folded!");
1825 Constant *ConstantExpr::getExtractValue(Constant *Agg,
1826 const unsigned *IdxList, unsigned NumIdx) {
1827 assert(Agg->getType()->isFirstClassType() &&
1828 "Tried to create extractelement operation on non-first-class type!");
1831 ExtractValueInst::getIndexedType(Agg->getType(), IdxList, IdxList+NumIdx);
1832 assert(ReqTy && "extractvalue indices invalid!");
1833 return getExtractValueTy(ReqTy, Agg, IdxList, NumIdx);
1836 Constant* ConstantExpr::getNeg(Constant* C) {
1837 assert(C->getType()->isIntOrIntVectorTy() &&
1838 "Cannot NEG a nonintegral value!");
1839 return get(Instruction::Sub,
1840 ConstantFP::getZeroValueForNegation(C->getType()),
1844 Constant* ConstantExpr::getFNeg(Constant* C) {
1845 assert(C->getType()->isFPOrFPVectorTy() &&
1846 "Cannot FNEG a non-floating-point value!");
1847 return get(Instruction::FSub,
1848 ConstantFP::getZeroValueForNegation(C->getType()),
1852 Constant* ConstantExpr::getNot(Constant* C) {
1853 assert(C->getType()->isIntOrIntVectorTy() &&
1854 "Cannot NOT a nonintegral value!");
1855 return get(Instruction::Xor, C, Constant::getAllOnesValue(C->getType()));
1858 Constant* ConstantExpr::getAdd(Constant* C1, Constant* C2) {
1859 return get(Instruction::Add, C1, C2);
1862 Constant* ConstantExpr::getFAdd(Constant* C1, Constant* C2) {
1863 return get(Instruction::FAdd, C1, C2);
1866 Constant* ConstantExpr::getSub(Constant* C1, Constant* C2) {
1867 return get(Instruction::Sub, C1, C2);
1870 Constant* ConstantExpr::getFSub(Constant* C1, Constant* C2) {
1871 return get(Instruction::FSub, C1, C2);
1874 Constant* ConstantExpr::getMul(Constant* C1, Constant* C2) {
1875 return get(Instruction::Mul, C1, C2);
1878 Constant* ConstantExpr::getFMul(Constant* C1, Constant* C2) {
1879 return get(Instruction::FMul, C1, C2);
1882 Constant* ConstantExpr::getUDiv(Constant* C1, Constant* C2) {
1883 return get(Instruction::UDiv, C1, C2);
1886 Constant* ConstantExpr::getSDiv(Constant* C1, Constant* C2) {
1887 return get(Instruction::SDiv, C1, C2);
1890 Constant* ConstantExpr::getFDiv(Constant* C1, Constant* C2) {
1891 return get(Instruction::FDiv, C1, C2);
1894 Constant* ConstantExpr::getURem(Constant* C1, Constant* C2) {
1895 return get(Instruction::URem, C1, C2);
1898 Constant* ConstantExpr::getSRem(Constant* C1, Constant* C2) {
1899 return get(Instruction::SRem, C1, C2);
1902 Constant* ConstantExpr::getFRem(Constant* C1, Constant* C2) {
1903 return get(Instruction::FRem, C1, C2);
1906 Constant* ConstantExpr::getAnd(Constant* C1, Constant* C2) {
1907 return get(Instruction::And, C1, C2);
1910 Constant* ConstantExpr::getOr(Constant* C1, Constant* C2) {
1911 return get(Instruction::Or, C1, C2);
1914 Constant* ConstantExpr::getXor(Constant* C1, Constant* C2) {
1915 return get(Instruction::Xor, C1, C2);
1918 Constant* ConstantExpr::getShl(Constant* C1, Constant* C2) {
1919 return get(Instruction::Shl, C1, C2);
1922 Constant* ConstantExpr::getLShr(Constant* C1, Constant* C2) {
1923 return get(Instruction::LShr, C1, C2);
1926 Constant* ConstantExpr::getAShr(Constant* C1, Constant* C2) {
1927 return get(Instruction::AShr, C1, C2);
1930 // destroyConstant - Remove the constant from the constant table...
1932 void ConstantExpr::destroyConstant() {
1933 getType()->getContext().pImpl->ExprConstants.remove(this);
1934 destroyConstantImpl();
1937 const char *ConstantExpr::getOpcodeName() const {
1938 return Instruction::getOpcodeName(getOpcode());
1943 GetElementPtrConstantExpr::
1944 GetElementPtrConstantExpr(Constant *C, const std::vector<Constant*> &IdxList,
1946 : ConstantExpr(DestTy, Instruction::GetElementPtr,
1947 OperandTraits<GetElementPtrConstantExpr>::op_end(this)
1948 - (IdxList.size()+1), IdxList.size()+1) {
1950 for (unsigned i = 0, E = IdxList.size(); i != E; ++i)
1951 OperandList[i+1] = IdxList[i];
1955 //===----------------------------------------------------------------------===//
1956 // replaceUsesOfWithOnConstant implementations
1958 /// replaceUsesOfWithOnConstant - Update this constant array to change uses of
1959 /// 'From' to be uses of 'To'. This must update the uniquing data structures
1962 /// Note that we intentionally replace all uses of From with To here. Consider
1963 /// a large array that uses 'From' 1000 times. By handling this case all here,
1964 /// ConstantArray::replaceUsesOfWithOnConstant is only invoked once, and that
1965 /// single invocation handles all 1000 uses. Handling them one at a time would
1966 /// work, but would be really slow because it would have to unique each updated
1969 void ConstantArray::replaceUsesOfWithOnConstant(Value *From, Value *To,
1971 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
1972 Constant *ToC = cast<Constant>(To);
1974 LLVMContext &Context = getType()->getContext();
1975 LLVMContextImpl *pImpl = Context.pImpl;
1977 std::pair<LLVMContextImpl::ArrayConstantsTy::MapKey, ConstantArray*> Lookup;
1978 Lookup.first.first = getType();
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(getType());
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 = getType();
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 LLVMContext &Context = getType()->getContext();
2086 LLVMContextImpl *pImpl = Context.pImpl;
2088 Constant *Replacement = 0;
2090 Replacement = ConstantAggregateZero::get(getType());
2092 // Check to see if we have this array type already.
2094 LLVMContextImpl::StructConstantsTy::MapTy::iterator I =
2095 pImpl->StructConstants.InsertOrGetItem(Lookup, Exists);
2098 Replacement = I->second;
2100 // Okay, the new shape doesn't exist in the system yet. Instead of
2101 // creating a new constant struct, inserting it, replaceallusesof'ing the
2102 // old with the new, then deleting the old... just update the current one
2104 pImpl->StructConstants.MoveConstantToNewSlot(this, I);
2106 // Update to the new value.
2107 setOperand(OperandToUpdate, ToC);
2112 assert(Replacement != this && "I didn't contain From!");
2114 // Everyone using this now uses the replacement.
2115 uncheckedReplaceAllUsesWith(Replacement);
2117 // Delete the old constant!
2121 void ConstantUnion::replaceUsesOfWithOnConstant(Value *From, Value *To,
2123 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2124 Constant *ToC = cast<Constant>(To);
2126 assert(U == OperandList && "Union constants can only have one use!");
2127 assert(getNumOperands() == 1 && "Union constants can only have one use!");
2128 assert(getOperand(0) == From && "ReplaceAllUsesWith broken!");
2130 std::pair<LLVMContextImpl::UnionConstantsTy::MapKey, ConstantUnion*> Lookup;
2131 Lookup.first.first = getType();
2132 Lookup.second = this;
2133 Lookup.first.second = ToC;
2135 LLVMContext &Context = getType()->getContext();
2136 LLVMContextImpl *pImpl = Context.pImpl;
2138 Constant *Replacement = 0;
2139 if (ToC->isNullValue()) {
2140 Replacement = ConstantAggregateZero::get(getType());
2142 // Check to see if we have this union type already.
2144 LLVMContextImpl::UnionConstantsTy::MapTy::iterator I =
2145 pImpl->UnionConstants.InsertOrGetItem(Lookup, Exists);
2148 Replacement = I->second;
2150 // Okay, the new shape doesn't exist in the system yet. Instead of
2151 // creating a new constant union, inserting it, replaceallusesof'ing the
2152 // old with the new, then deleting the old... just update the current one
2154 pImpl->UnionConstants.MoveConstantToNewSlot(this, I);
2156 // Update to the new value.
2162 assert(Replacement != this && "I didn't contain From!");
2164 // Everyone using this now uses the replacement.
2165 uncheckedReplaceAllUsesWith(Replacement);
2167 // Delete the old constant!
2171 void ConstantVector::replaceUsesOfWithOnConstant(Value *From, Value *To,
2173 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2175 std::vector<Constant*> Values;
2176 Values.reserve(getNumOperands()); // Build replacement array...
2177 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
2178 Constant *Val = getOperand(i);
2179 if (Val == From) Val = cast<Constant>(To);
2180 Values.push_back(Val);
2183 Constant *Replacement = get(getType(), Values);
2184 assert(Replacement != this && "I didn't contain From!");
2186 // Everyone using this now uses the replacement.
2187 uncheckedReplaceAllUsesWith(Replacement);
2189 // Delete the old constant!
2193 void ConstantExpr::replaceUsesOfWithOnConstant(Value *From, Value *ToV,
2195 assert(isa<Constant>(ToV) && "Cannot make Constant refer to non-constant!");
2196 Constant *To = cast<Constant>(ToV);
2198 Constant *Replacement = 0;
2199 if (getOpcode() == Instruction::GetElementPtr) {
2200 SmallVector<Constant*, 8> Indices;
2201 Constant *Pointer = getOperand(0);
2202 Indices.reserve(getNumOperands()-1);
2203 if (Pointer == From) Pointer = To;
2205 for (unsigned i = 1, e = getNumOperands(); i != e; ++i) {
2206 Constant *Val = getOperand(i);
2207 if (Val == From) Val = To;
2208 Indices.push_back(Val);
2210 Replacement = ConstantExpr::getGetElementPtr(Pointer,
2211 &Indices[0], Indices.size());
2212 } else if (getOpcode() == Instruction::ExtractValue) {
2213 Constant *Agg = getOperand(0);
2214 if (Agg == From) Agg = To;
2216 const SmallVector<unsigned, 4> &Indices = getIndices();
2217 Replacement = ConstantExpr::getExtractValue(Agg,
2218 &Indices[0], Indices.size());
2219 } else if (getOpcode() == Instruction::InsertValue) {
2220 Constant *Agg = getOperand(0);
2221 Constant *Val = getOperand(1);
2222 if (Agg == From) Agg = To;
2223 if (Val == From) Val = To;
2225 const SmallVector<unsigned, 4> &Indices = getIndices();
2226 Replacement = ConstantExpr::getInsertValue(Agg, Val,
2227 &Indices[0], Indices.size());
2228 } else if (isCast()) {
2229 assert(getOperand(0) == From && "Cast only has one use!");
2230 Replacement = ConstantExpr::getCast(getOpcode(), To, getType());
2231 } else if (getOpcode() == Instruction::Select) {
2232 Constant *C1 = getOperand(0);
2233 Constant *C2 = getOperand(1);
2234 Constant *C3 = getOperand(2);
2235 if (C1 == From) C1 = To;
2236 if (C2 == From) C2 = To;
2237 if (C3 == From) C3 = To;
2238 Replacement = ConstantExpr::getSelect(C1, C2, C3);
2239 } else if (getOpcode() == Instruction::ExtractElement) {
2240 Constant *C1 = getOperand(0);
2241 Constant *C2 = getOperand(1);
2242 if (C1 == From) C1 = To;
2243 if (C2 == From) C2 = To;
2244 Replacement = ConstantExpr::getExtractElement(C1, C2);
2245 } else if (getOpcode() == Instruction::InsertElement) {
2246 Constant *C1 = getOperand(0);
2247 Constant *C2 = getOperand(1);
2248 Constant *C3 = getOperand(1);
2249 if (C1 == From) C1 = To;
2250 if (C2 == From) C2 = To;
2251 if (C3 == From) C3 = To;
2252 Replacement = ConstantExpr::getInsertElement(C1, C2, C3);
2253 } else if (getOpcode() == Instruction::ShuffleVector) {
2254 Constant *C1 = getOperand(0);
2255 Constant *C2 = getOperand(1);
2256 Constant *C3 = getOperand(2);
2257 if (C1 == From) C1 = To;
2258 if (C2 == From) C2 = To;
2259 if (C3 == From) C3 = To;
2260 Replacement = ConstantExpr::getShuffleVector(C1, C2, C3);
2261 } else if (isCompare()) {
2262 Constant *C1 = getOperand(0);
2263 Constant *C2 = getOperand(1);
2264 if (C1 == From) C1 = To;
2265 if (C2 == From) C2 = To;
2266 if (getOpcode() == Instruction::ICmp)
2267 Replacement = ConstantExpr::getICmp(getPredicate(), C1, C2);
2269 assert(getOpcode() == Instruction::FCmp);
2270 Replacement = ConstantExpr::getFCmp(getPredicate(), C1, C2);
2272 } else if (getNumOperands() == 2) {
2273 Constant *C1 = getOperand(0);
2274 Constant *C2 = getOperand(1);
2275 if (C1 == From) C1 = To;
2276 if (C2 == From) C2 = To;
2277 Replacement = ConstantExpr::get(getOpcode(), C1, C2, SubclassOptionalData);
2279 llvm_unreachable("Unknown ConstantExpr type!");
2283 assert(Replacement != this && "I didn't contain From!");
2285 // Everyone using this now uses the replacement.
2286 uncheckedReplaceAllUsesWith(Replacement);
2288 // Delete the old constant!