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:
63 case Type::VectorTyID:
64 return ConstantAggregateZero::get(Ty);
66 // Function, Label, or Opaque type?
67 assert(!"Cannot create a null constant of that type!");
72 Constant* Constant::getIntegerValue(const Type *Ty, const APInt &V) {
73 const Type *ScalarTy = Ty->getScalarType();
75 // Create the base integer constant.
76 Constant *C = ConstantInt::get(Ty->getContext(), V);
78 // Convert an integer to a pointer, if necessary.
79 if (const PointerType *PTy = dyn_cast<PointerType>(ScalarTy))
80 C = ConstantExpr::getIntToPtr(C, PTy);
82 // Broadcast a scalar to a vector, if necessary.
83 if (const VectorType *VTy = dyn_cast<VectorType>(Ty))
84 C = ConstantVector::get(std::vector<Constant *>(VTy->getNumElements(), C));
89 Constant* Constant::getAllOnesValue(const Type *Ty) {
90 if (const IntegerType *ITy = dyn_cast<IntegerType>(Ty))
91 return ConstantInt::get(Ty->getContext(),
92 APInt::getAllOnesValue(ITy->getBitWidth()));
94 std::vector<Constant*> Elts;
95 const VectorType *VTy = cast<VectorType>(Ty);
96 Elts.resize(VTy->getNumElements(), getAllOnesValue(VTy->getElementType()));
97 assert(Elts[0] && "Not a vector integer type!");
98 return cast<ConstantVector>(ConstantVector::get(Elts));
101 void Constant::destroyConstantImpl() {
102 // When a Constant is destroyed, there may be lingering
103 // references to the constant by other constants in the constant pool. These
104 // constants are implicitly dependent on the module that is being deleted,
105 // but they don't know that. Because we only find out when the CPV is
106 // deleted, we must now notify all of our users (that should only be
107 // Constants) that they are, in fact, invalid now and should be deleted.
109 while (!use_empty()) {
110 Value *V = use_back();
111 #ifndef NDEBUG // Only in -g mode...
112 if (!isa<Constant>(V)) {
113 dbgs() << "While deleting: " << *this
114 << "\n\nUse still stuck around after Def is destroyed: "
118 assert(isa<Constant>(V) && "References remain to Constant being destroyed");
119 Constant *CV = cast<Constant>(V);
120 CV->destroyConstant();
122 // The constant should remove itself from our use list...
123 assert((use_empty() || use_back() != V) && "Constant not removed!");
126 // Value has no outstanding references it is safe to delete it now...
130 /// canTrap - Return true if evaluation of this constant could trap. This is
131 /// true for things like constant expressions that could divide by zero.
132 bool Constant::canTrap() const {
133 assert(getType()->isFirstClassType() && "Cannot evaluate aggregate vals!");
134 // The only thing that could possibly trap are constant exprs.
135 const ConstantExpr *CE = dyn_cast<ConstantExpr>(this);
136 if (!CE) return false;
138 // ConstantExpr traps if any operands can trap.
139 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
140 if (CE->getOperand(i)->canTrap())
143 // Otherwise, only specific operations can trap.
144 switch (CE->getOpcode()) {
147 case Instruction::UDiv:
148 case Instruction::SDiv:
149 case Instruction::FDiv:
150 case Instruction::URem:
151 case Instruction::SRem:
152 case Instruction::FRem:
153 // Div and rem can trap if the RHS is not known to be non-zero.
154 if (!isa<ConstantInt>(CE->getOperand(1)) ||CE->getOperand(1)->isNullValue())
160 /// isConstantUsed - Return true if the constant has users other than constant
161 /// exprs and other dangling things.
162 bool Constant::isConstantUsed() const {
163 for (use_const_iterator UI = use_begin(), E = use_end(); UI != E; ++UI) {
164 const Constant *UC = dyn_cast<Constant>(*UI);
165 if (UC == 0 || isa<GlobalValue>(UC))
168 if (UC->isConstantUsed())
176 /// getRelocationInfo - This method classifies the entry according to
177 /// whether or not it may generate a relocation entry. This must be
178 /// conservative, so if it might codegen to a relocatable entry, it should say
179 /// so. The return values are:
181 /// NoRelocation: This constant pool entry is guaranteed to never have a
182 /// relocation applied to it (because it holds a simple constant like
184 /// LocalRelocation: This entry has relocations, but the entries are
185 /// guaranteed to be resolvable by the static linker, so the dynamic
186 /// linker will never see them.
187 /// GlobalRelocations: This entry may have arbitrary relocations.
189 /// FIXME: This really should not be in VMCore.
190 Constant::PossibleRelocationsTy Constant::getRelocationInfo() const {
191 if (const GlobalValue *GV = dyn_cast<GlobalValue>(this)) {
192 if (GV->hasLocalLinkage() || GV->hasHiddenVisibility())
193 return LocalRelocation; // Local to this file/library.
194 return GlobalRelocations; // Global reference.
197 if (const BlockAddress *BA = dyn_cast<BlockAddress>(this))
198 return BA->getFunction()->getRelocationInfo();
200 // While raw uses of blockaddress need to be relocated, differences between
201 // two of them don't when they are for labels in the same function. This is a
202 // common idiom when creating a table for the indirect goto extension, so we
203 // handle it efficiently here.
204 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(this))
205 if (CE->getOpcode() == Instruction::Sub) {
206 ConstantExpr *LHS = dyn_cast<ConstantExpr>(CE->getOperand(0));
207 ConstantExpr *RHS = dyn_cast<ConstantExpr>(CE->getOperand(1));
209 LHS->getOpcode() == Instruction::PtrToInt &&
210 RHS->getOpcode() == Instruction::PtrToInt &&
211 isa<BlockAddress>(LHS->getOperand(0)) &&
212 isa<BlockAddress>(RHS->getOperand(0)) &&
213 cast<BlockAddress>(LHS->getOperand(0))->getFunction() ==
214 cast<BlockAddress>(RHS->getOperand(0))->getFunction())
218 PossibleRelocationsTy Result = NoRelocation;
219 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
220 Result = std::max(Result,
221 cast<Constant>(getOperand(i))->getRelocationInfo());
227 /// getVectorElements - This method, which is only valid on constant of vector
228 /// type, returns the elements of the vector in the specified smallvector.
229 /// This handles breaking down a vector undef into undef elements, etc. For
230 /// constant exprs and other cases we can't handle, we return an empty vector.
231 void Constant::getVectorElements(LLVMContext &Context,
232 SmallVectorImpl<Constant*> &Elts) const {
233 assert(isa<VectorType>(getType()) && "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()->isFloatingPoint()) {
409 std::vector<Constant*> zeros(PTy->getNumElements(),
410 getNegativeZero(PTy->getElementType()));
411 return ConstantVector::get(PTy, zeros);
414 if (Ty->isFloatingPoint())
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 ConstantVector::ConstantVector(const VectorType *T,
590 const std::vector<Constant*> &V)
591 : Constant(T, ConstantVectorVal,
592 OperandTraits<ConstantVector>::op_end(this) - V.size(),
594 Use *OL = OperandList;
595 for (std::vector<Constant*>::const_iterator I = V.begin(), E = V.end();
598 assert(C->getType() == T->getElementType() &&
599 "Initializer for vector element doesn't match vector element type!");
604 // ConstantVector accessors.
605 Constant* ConstantVector::get(const VectorType* T,
606 const std::vector<Constant*>& V) {
607 assert(!V.empty() && "Vectors can't be empty");
608 LLVMContext &Context = T->getContext();
609 LLVMContextImpl *pImpl = Context.pImpl;
611 // If this is an all-undef or alll-zero vector, return a
612 // ConstantAggregateZero or UndefValue.
614 bool isZero = C->isNullValue();
615 bool isUndef = isa<UndefValue>(C);
617 if (isZero || isUndef) {
618 for (unsigned i = 1, e = V.size(); i != e; ++i)
620 isZero = isUndef = false;
626 return ConstantAggregateZero::get(T);
628 return UndefValue::get(T);
630 return pImpl->VectorConstants.getOrCreate(T, V);
633 Constant* ConstantVector::get(const std::vector<Constant*>& V) {
634 assert(!V.empty() && "Cannot infer type if V is empty");
635 return get(VectorType::get(V.front()->getType(),V.size()), V);
638 Constant* ConstantVector::get(Constant* const* Vals, unsigned NumVals) {
639 // FIXME: make this the primary ctor method.
640 return get(std::vector<Constant*>(Vals, Vals+NumVals));
643 Constant* ConstantExpr::getNSWNeg(Constant* C) {
644 assert(C->getType()->isIntOrIntVector() &&
645 "Cannot NEG a nonintegral value!");
646 return getNSWSub(ConstantFP::getZeroValueForNegation(C->getType()), C);
649 Constant* ConstantExpr::getNSWAdd(Constant* C1, Constant* C2) {
650 return getTy(C1->getType(), Instruction::Add, C1, C2,
651 OverflowingBinaryOperator::NoSignedWrap);
654 Constant* ConstantExpr::getNSWSub(Constant* C1, Constant* C2) {
655 return getTy(C1->getType(), Instruction::Sub, C1, C2,
656 OverflowingBinaryOperator::NoSignedWrap);
659 Constant* ConstantExpr::getNSWMul(Constant* C1, Constant* C2) {
660 return getTy(C1->getType(), Instruction::Mul, C1, C2,
661 OverflowingBinaryOperator::NoSignedWrap);
664 Constant* ConstantExpr::getExactSDiv(Constant* C1, Constant* C2) {
665 return getTy(C1->getType(), Instruction::SDiv, C1, C2,
666 SDivOperator::IsExact);
669 // Utility function for determining if a ConstantExpr is a CastOp or not. This
670 // can't be inline because we don't want to #include Instruction.h into
672 bool ConstantExpr::isCast() const {
673 return Instruction::isCast(getOpcode());
676 bool ConstantExpr::isCompare() const {
677 return getOpcode() == Instruction::ICmp || getOpcode() == Instruction::FCmp;
680 bool ConstantExpr::isGEPWithNoNotionalOverIndexing() const {
681 if (getOpcode() != Instruction::GetElementPtr) return false;
683 gep_type_iterator GEPI = gep_type_begin(this), E = gep_type_end(this);
684 User::const_op_iterator OI = next(this->op_begin());
686 // Skip the first index, as it has no static limit.
690 // The remaining indices must be compile-time known integers within the
691 // bounds of the corresponding notional static array types.
692 for (; GEPI != E; ++GEPI, ++OI) {
693 ConstantInt *CI = dyn_cast<ConstantInt>(*OI);
694 if (!CI) return false;
695 if (const ArrayType *ATy = dyn_cast<ArrayType>(*GEPI))
696 if (CI->getValue().getActiveBits() > 64 ||
697 CI->getZExtValue() >= ATy->getNumElements())
701 // All the indices checked out.
705 bool ConstantExpr::hasIndices() const {
706 return getOpcode() == Instruction::ExtractValue ||
707 getOpcode() == Instruction::InsertValue;
710 const SmallVector<unsigned, 4> &ConstantExpr::getIndices() const {
711 if (const ExtractValueConstantExpr *EVCE =
712 dyn_cast<ExtractValueConstantExpr>(this))
713 return EVCE->Indices;
715 return cast<InsertValueConstantExpr>(this)->Indices;
718 unsigned ConstantExpr::getPredicate() const {
719 assert(getOpcode() == Instruction::FCmp ||
720 getOpcode() == Instruction::ICmp);
721 return ((const CompareConstantExpr*)this)->predicate;
724 /// getWithOperandReplaced - Return a constant expression identical to this
725 /// one, but with the specified operand set to the specified value.
727 ConstantExpr::getWithOperandReplaced(unsigned OpNo, Constant *Op) const {
728 assert(OpNo < getNumOperands() && "Operand num is out of range!");
729 assert(Op->getType() == getOperand(OpNo)->getType() &&
730 "Replacing operand with value of different type!");
731 if (getOperand(OpNo) == Op)
732 return const_cast<ConstantExpr*>(this);
734 Constant *Op0, *Op1, *Op2;
735 switch (getOpcode()) {
736 case Instruction::Trunc:
737 case Instruction::ZExt:
738 case Instruction::SExt:
739 case Instruction::FPTrunc:
740 case Instruction::FPExt:
741 case Instruction::UIToFP:
742 case Instruction::SIToFP:
743 case Instruction::FPToUI:
744 case Instruction::FPToSI:
745 case Instruction::PtrToInt:
746 case Instruction::IntToPtr:
747 case Instruction::BitCast:
748 return ConstantExpr::getCast(getOpcode(), Op, getType());
749 case Instruction::Select:
750 Op0 = (OpNo == 0) ? Op : getOperand(0);
751 Op1 = (OpNo == 1) ? Op : getOperand(1);
752 Op2 = (OpNo == 2) ? Op : getOperand(2);
753 return ConstantExpr::getSelect(Op0, Op1, Op2);
754 case Instruction::InsertElement:
755 Op0 = (OpNo == 0) ? Op : getOperand(0);
756 Op1 = (OpNo == 1) ? Op : getOperand(1);
757 Op2 = (OpNo == 2) ? Op : getOperand(2);
758 return ConstantExpr::getInsertElement(Op0, Op1, Op2);
759 case Instruction::ExtractElement:
760 Op0 = (OpNo == 0) ? Op : getOperand(0);
761 Op1 = (OpNo == 1) ? Op : getOperand(1);
762 return ConstantExpr::getExtractElement(Op0, Op1);
763 case Instruction::ShuffleVector:
764 Op0 = (OpNo == 0) ? Op : getOperand(0);
765 Op1 = (OpNo == 1) ? Op : getOperand(1);
766 Op2 = (OpNo == 2) ? Op : getOperand(2);
767 return ConstantExpr::getShuffleVector(Op0, Op1, Op2);
768 case Instruction::GetElementPtr: {
769 SmallVector<Constant*, 8> Ops;
770 Ops.resize(getNumOperands()-1);
771 for (unsigned i = 1, e = getNumOperands(); i != e; ++i)
772 Ops[i-1] = getOperand(i);
774 return cast<GEPOperator>(this)->isInBounds() ?
775 ConstantExpr::getInBoundsGetElementPtr(Op, &Ops[0], Ops.size()) :
776 ConstantExpr::getGetElementPtr(Op, &Ops[0], Ops.size());
778 return cast<GEPOperator>(this)->isInBounds() ?
779 ConstantExpr::getInBoundsGetElementPtr(getOperand(0), &Ops[0],Ops.size()):
780 ConstantExpr::getGetElementPtr(getOperand(0), &Ops[0], Ops.size());
783 assert(getNumOperands() == 2 && "Must be binary operator?");
784 Op0 = (OpNo == 0) ? Op : getOperand(0);
785 Op1 = (OpNo == 1) ? Op : getOperand(1);
786 return ConstantExpr::get(getOpcode(), Op0, Op1, SubclassOptionalData);
790 /// getWithOperands - This returns the current constant expression with the
791 /// operands replaced with the specified values. The specified operands must
792 /// match count and type with the existing ones.
793 Constant *ConstantExpr::
794 getWithOperands(Constant* const *Ops, unsigned NumOps) const {
795 assert(NumOps == getNumOperands() && "Operand count mismatch!");
796 bool AnyChange = false;
797 for (unsigned i = 0; i != NumOps; ++i) {
798 assert(Ops[i]->getType() == getOperand(i)->getType() &&
799 "Operand type mismatch!");
800 AnyChange |= Ops[i] != getOperand(i);
802 if (!AnyChange) // No operands changed, return self.
803 return const_cast<ConstantExpr*>(this);
805 switch (getOpcode()) {
806 case Instruction::Trunc:
807 case Instruction::ZExt:
808 case Instruction::SExt:
809 case Instruction::FPTrunc:
810 case Instruction::FPExt:
811 case Instruction::UIToFP:
812 case Instruction::SIToFP:
813 case Instruction::FPToUI:
814 case Instruction::FPToSI:
815 case Instruction::PtrToInt:
816 case Instruction::IntToPtr:
817 case Instruction::BitCast:
818 return ConstantExpr::getCast(getOpcode(), Ops[0], getType());
819 case Instruction::Select:
820 return ConstantExpr::getSelect(Ops[0], Ops[1], Ops[2]);
821 case Instruction::InsertElement:
822 return ConstantExpr::getInsertElement(Ops[0], Ops[1], Ops[2]);
823 case Instruction::ExtractElement:
824 return ConstantExpr::getExtractElement(Ops[0], Ops[1]);
825 case Instruction::ShuffleVector:
826 return ConstantExpr::getShuffleVector(Ops[0], Ops[1], Ops[2]);
827 case Instruction::GetElementPtr:
828 return cast<GEPOperator>(this)->isInBounds() ?
829 ConstantExpr::getInBoundsGetElementPtr(Ops[0], &Ops[1], NumOps-1) :
830 ConstantExpr::getGetElementPtr(Ops[0], &Ops[1], NumOps-1);
831 case Instruction::ICmp:
832 case Instruction::FCmp:
833 return ConstantExpr::getCompare(getPredicate(), Ops[0], Ops[1]);
835 assert(getNumOperands() == 2 && "Must be binary operator?");
836 return ConstantExpr::get(getOpcode(), Ops[0], Ops[1], SubclassOptionalData);
841 //===----------------------------------------------------------------------===//
842 // isValueValidForType implementations
844 bool ConstantInt::isValueValidForType(const Type *Ty, uint64_t Val) {
845 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth(); // assert okay
846 if (Ty == Type::getInt1Ty(Ty->getContext()))
847 return Val == 0 || Val == 1;
849 return true; // always true, has to fit in largest type
850 uint64_t Max = (1ll << NumBits) - 1;
854 bool ConstantInt::isValueValidForType(const Type *Ty, int64_t Val) {
855 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth(); // assert okay
856 if (Ty == Type::getInt1Ty(Ty->getContext()))
857 return Val == 0 || Val == 1 || Val == -1;
859 return true; // always true, has to fit in largest type
860 int64_t Min = -(1ll << (NumBits-1));
861 int64_t Max = (1ll << (NumBits-1)) - 1;
862 return (Val >= Min && Val <= Max);
865 bool ConstantFP::isValueValidForType(const Type *Ty, const APFloat& Val) {
866 // convert modifies in place, so make a copy.
867 APFloat Val2 = APFloat(Val);
869 switch (Ty->getTypeID()) {
871 return false; // These can't be represented as floating point!
873 // FIXME rounding mode needs to be more flexible
874 case Type::FloatTyID: {
875 if (&Val2.getSemantics() == &APFloat::IEEEsingle)
877 Val2.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, &losesInfo);
880 case Type::DoubleTyID: {
881 if (&Val2.getSemantics() == &APFloat::IEEEsingle ||
882 &Val2.getSemantics() == &APFloat::IEEEdouble)
884 Val2.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &losesInfo);
887 case Type::X86_FP80TyID:
888 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
889 &Val2.getSemantics() == &APFloat::IEEEdouble ||
890 &Val2.getSemantics() == &APFloat::x87DoubleExtended;
891 case Type::FP128TyID:
892 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
893 &Val2.getSemantics() == &APFloat::IEEEdouble ||
894 &Val2.getSemantics() == &APFloat::IEEEquad;
895 case Type::PPC_FP128TyID:
896 return &Val2.getSemantics() == &APFloat::IEEEsingle ||
897 &Val2.getSemantics() == &APFloat::IEEEdouble ||
898 &Val2.getSemantics() == &APFloat::PPCDoubleDouble;
902 //===----------------------------------------------------------------------===//
903 // Factory Function Implementation
905 ConstantAggregateZero* ConstantAggregateZero::get(const Type* Ty) {
906 assert((isa<StructType>(Ty) || isa<ArrayType>(Ty) || isa<VectorType>(Ty)) &&
907 "Cannot create an aggregate zero of non-aggregate type!");
909 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
910 return pImpl->AggZeroConstants.getOrCreate(Ty, 0);
913 /// destroyConstant - Remove the constant from the constant table...
915 void ConstantAggregateZero::destroyConstant() {
916 getType()->getContext().pImpl->AggZeroConstants.remove(this);
917 destroyConstantImpl();
920 /// destroyConstant - Remove the constant from the constant table...
922 void ConstantArray::destroyConstant() {
923 getType()->getContext().pImpl->ArrayConstants.remove(this);
924 destroyConstantImpl();
927 /// isString - This method returns true if the array is an array of i8, and
928 /// if the elements of the array are all ConstantInt's.
929 bool ConstantArray::isString() const {
930 // Check the element type for i8...
931 if (!getType()->getElementType()->isInteger(8))
933 // Check the elements to make sure they are all integers, not constant
935 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
936 if (!isa<ConstantInt>(getOperand(i)))
941 /// isCString - This method returns true if the array is a string (see
942 /// isString) and it ends in a null byte \\0 and does not contains any other
943 /// null bytes except its terminator.
944 bool ConstantArray::isCString() const {
945 // Check the element type for i8...
946 if (!getType()->getElementType()->isInteger(8))
949 // Last element must be a null.
950 if (!getOperand(getNumOperands()-1)->isNullValue())
952 // Other elements must be non-null integers.
953 for (unsigned i = 0, e = getNumOperands()-1; i != e; ++i) {
954 if (!isa<ConstantInt>(getOperand(i)))
956 if (getOperand(i)->isNullValue())
963 /// getAsString - If the sub-element type of this array is i8
964 /// then this method converts the array to an std::string and returns it.
965 /// Otherwise, it asserts out.
967 std::string ConstantArray::getAsString() const {
968 assert(isString() && "Not a string!");
970 Result.reserve(getNumOperands());
971 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
972 Result.push_back((char)cast<ConstantInt>(getOperand(i))->getZExtValue());
977 //---- ConstantStruct::get() implementation...
984 // destroyConstant - Remove the constant from the constant table...
986 void ConstantStruct::destroyConstant() {
987 getType()->getContext().pImpl->StructConstants.remove(this);
988 destroyConstantImpl();
991 // destroyConstant - Remove the constant from the constant table...
993 void ConstantVector::destroyConstant() {
994 getType()->getContext().pImpl->VectorConstants.remove(this);
995 destroyConstantImpl();
998 /// This function will return true iff every element in this vector constant
999 /// is set to all ones.
1000 /// @returns true iff this constant's emements are all set to all ones.
1001 /// @brief Determine if the value is all ones.
1002 bool ConstantVector::isAllOnesValue() const {
1003 // Check out first element.
1004 const Constant *Elt = getOperand(0);
1005 const ConstantInt *CI = dyn_cast<ConstantInt>(Elt);
1006 if (!CI || !CI->isAllOnesValue()) return false;
1007 // Then make sure all remaining elements point to the same value.
1008 for (unsigned I = 1, E = getNumOperands(); I < E; ++I) {
1009 if (getOperand(I) != Elt) return false;
1014 /// getSplatValue - If this is a splat constant, where all of the
1015 /// elements have the same value, return that value. Otherwise return null.
1016 Constant *ConstantVector::getSplatValue() {
1017 // Check out first element.
1018 Constant *Elt = getOperand(0);
1019 // Then make sure all remaining elements point to the same value.
1020 for (unsigned I = 1, E = getNumOperands(); I < E; ++I)
1021 if (getOperand(I) != Elt) return 0;
1025 //---- ConstantPointerNull::get() implementation.
1028 ConstantPointerNull *ConstantPointerNull::get(const PointerType *Ty) {
1029 return Ty->getContext().pImpl->NullPtrConstants.getOrCreate(Ty, 0);
1032 // destroyConstant - Remove the constant from the constant table...
1034 void ConstantPointerNull::destroyConstant() {
1035 getType()->getContext().pImpl->NullPtrConstants.remove(this);
1036 destroyConstantImpl();
1040 //---- UndefValue::get() implementation.
1043 UndefValue *UndefValue::get(const Type *Ty) {
1044 return Ty->getContext().pImpl->UndefValueConstants.getOrCreate(Ty, 0);
1047 // destroyConstant - Remove the constant from the constant table.
1049 void UndefValue::destroyConstant() {
1050 getType()->getContext().pImpl->UndefValueConstants.remove(this);
1051 destroyConstantImpl();
1054 //---- BlockAddress::get() implementation.
1057 BlockAddress *BlockAddress::get(BasicBlock *BB) {
1058 assert(BB->getParent() != 0 && "Block must have a parent");
1059 return get(BB->getParent(), BB);
1062 BlockAddress *BlockAddress::get(Function *F, BasicBlock *BB) {
1064 F->getContext().pImpl->BlockAddresses[std::make_pair(F, BB)];
1066 BA = new BlockAddress(F, BB);
1068 assert(BA->getFunction() == F && "Basic block moved between functions");
1072 BlockAddress::BlockAddress(Function *F, BasicBlock *BB)
1073 : Constant(Type::getInt8PtrTy(F->getContext()), Value::BlockAddressVal,
1077 BB->AdjustBlockAddressRefCount(1);
1081 // destroyConstant - Remove the constant from the constant table.
1083 void BlockAddress::destroyConstant() {
1084 getFunction()->getType()->getContext().pImpl
1085 ->BlockAddresses.erase(std::make_pair(getFunction(), getBasicBlock()));
1086 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1087 destroyConstantImpl();
1090 void BlockAddress::replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) {
1091 // This could be replacing either the Basic Block or the Function. In either
1092 // case, we have to remove the map entry.
1093 Function *NewF = getFunction();
1094 BasicBlock *NewBB = getBasicBlock();
1097 NewF = cast<Function>(To);
1099 NewBB = cast<BasicBlock>(To);
1101 // See if the 'new' entry already exists, if not, just update this in place
1102 // and return early.
1103 BlockAddress *&NewBA =
1104 getContext().pImpl->BlockAddresses[std::make_pair(NewF, NewBB)];
1106 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1108 // Remove the old entry, this can't cause the map to rehash (just a
1109 // tombstone will get added).
1110 getContext().pImpl->BlockAddresses.erase(std::make_pair(getFunction(),
1113 setOperand(0, NewF);
1114 setOperand(1, NewBB);
1115 getBasicBlock()->AdjustBlockAddressRefCount(1);
1119 // Otherwise, I do need to replace this with an existing value.
1120 assert(NewBA != this && "I didn't contain From!");
1122 // Everyone using this now uses the replacement.
1123 uncheckedReplaceAllUsesWith(NewBA);
1128 //---- ConstantExpr::get() implementations.
1131 /// This is a utility function to handle folding of casts and lookup of the
1132 /// cast in the ExprConstants map. It is used by the various get* methods below.
1133 static inline Constant *getFoldedCast(
1134 Instruction::CastOps opc, Constant *C, const Type *Ty) {
1135 assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
1136 // Fold a few common cases
1137 if (Constant *FC = ConstantFoldCastInstruction(Ty->getContext(), opc, C, Ty))
1140 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
1142 // Look up the constant in the table first to ensure uniqueness
1143 std::vector<Constant*> argVec(1, C);
1144 ExprMapKeyType Key(opc, argVec);
1146 return pImpl->ExprConstants.getOrCreate(Ty, Key);
1149 Constant *ConstantExpr::getCast(unsigned oc, Constant *C, const Type *Ty) {
1150 Instruction::CastOps opc = Instruction::CastOps(oc);
1151 assert(Instruction::isCast(opc) && "opcode out of range");
1152 assert(C && Ty && "Null arguments to getCast");
1153 assert(CastInst::castIsValid(opc, C, Ty) && "Invalid constantexpr cast!");
1157 llvm_unreachable("Invalid cast opcode");
1159 case Instruction::Trunc: return getTrunc(C, Ty);
1160 case Instruction::ZExt: return getZExt(C, Ty);
1161 case Instruction::SExt: return getSExt(C, Ty);
1162 case Instruction::FPTrunc: return getFPTrunc(C, Ty);
1163 case Instruction::FPExt: return getFPExtend(C, Ty);
1164 case Instruction::UIToFP: return getUIToFP(C, Ty);
1165 case Instruction::SIToFP: return getSIToFP(C, Ty);
1166 case Instruction::FPToUI: return getFPToUI(C, Ty);
1167 case Instruction::FPToSI: return getFPToSI(C, Ty);
1168 case Instruction::PtrToInt: return getPtrToInt(C, Ty);
1169 case Instruction::IntToPtr: return getIntToPtr(C, Ty);
1170 case Instruction::BitCast: return getBitCast(C, Ty);
1175 Constant *ConstantExpr::getZExtOrBitCast(Constant *C, const Type *Ty) {
1176 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1177 return getCast(Instruction::BitCast, C, Ty);
1178 return getCast(Instruction::ZExt, C, Ty);
1181 Constant *ConstantExpr::getSExtOrBitCast(Constant *C, const Type *Ty) {
1182 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1183 return getCast(Instruction::BitCast, C, Ty);
1184 return getCast(Instruction::SExt, C, Ty);
1187 Constant *ConstantExpr::getTruncOrBitCast(Constant *C, const Type *Ty) {
1188 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1189 return getCast(Instruction::BitCast, C, Ty);
1190 return getCast(Instruction::Trunc, C, Ty);
1193 Constant *ConstantExpr::getPointerCast(Constant *S, const Type *Ty) {
1194 assert(isa<PointerType>(S->getType()) && "Invalid cast");
1195 assert((Ty->isInteger() || isa<PointerType>(Ty)) && "Invalid cast");
1197 if (Ty->isInteger())
1198 return getCast(Instruction::PtrToInt, S, Ty);
1199 return getCast(Instruction::BitCast, S, Ty);
1202 Constant *ConstantExpr::getIntegerCast(Constant *C, const Type *Ty,
1204 assert(C->getType()->isIntOrIntVector() &&
1205 Ty->isIntOrIntVector() && "Invalid cast");
1206 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1207 unsigned DstBits = Ty->getScalarSizeInBits();
1208 Instruction::CastOps opcode =
1209 (SrcBits == DstBits ? Instruction::BitCast :
1210 (SrcBits > DstBits ? Instruction::Trunc :
1211 (isSigned ? Instruction::SExt : Instruction::ZExt)));
1212 return getCast(opcode, C, Ty);
1215 Constant *ConstantExpr::getFPCast(Constant *C, const Type *Ty) {
1216 assert(C->getType()->isFPOrFPVector() && Ty->isFPOrFPVector() &&
1218 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1219 unsigned DstBits = Ty->getScalarSizeInBits();
1220 if (SrcBits == DstBits)
1221 return C; // Avoid a useless cast
1222 Instruction::CastOps opcode =
1223 (SrcBits > DstBits ? Instruction::FPTrunc : Instruction::FPExt);
1224 return getCast(opcode, C, Ty);
1227 Constant *ConstantExpr::getTrunc(Constant *C, const Type *Ty) {
1229 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1230 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1232 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1233 assert(C->getType()->isIntOrIntVector() && "Trunc operand must be integer");
1234 assert(Ty->isIntOrIntVector() && "Trunc produces only integral");
1235 assert(C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1236 "SrcTy must be larger than DestTy for Trunc!");
1238 return getFoldedCast(Instruction::Trunc, C, Ty);
1241 Constant *ConstantExpr::getSExt(Constant *C, const Type *Ty) {
1243 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1244 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1246 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1247 assert(C->getType()->isIntOrIntVector() && "SExt operand must be integral");
1248 assert(Ty->isIntOrIntVector() && "SExt produces only integer");
1249 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1250 "SrcTy must be smaller than DestTy for SExt!");
1252 return getFoldedCast(Instruction::SExt, C, Ty);
1255 Constant *ConstantExpr::getZExt(Constant *C, const Type *Ty) {
1257 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1258 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1260 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1261 assert(C->getType()->isIntOrIntVector() && "ZEXt operand must be integral");
1262 assert(Ty->isIntOrIntVector() && "ZExt produces only integer");
1263 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1264 "SrcTy must be smaller than DestTy for ZExt!");
1266 return getFoldedCast(Instruction::ZExt, C, Ty);
1269 Constant *ConstantExpr::getFPTrunc(Constant *C, const Type *Ty) {
1271 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1272 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1274 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1275 assert(C->getType()->isFPOrFPVector() && Ty->isFPOrFPVector() &&
1276 C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1277 "This is an illegal floating point truncation!");
1278 return getFoldedCast(Instruction::FPTrunc, C, Ty);
1281 Constant *ConstantExpr::getFPExtend(Constant *C, const Type *Ty) {
1283 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1284 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1286 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1287 assert(C->getType()->isFPOrFPVector() && Ty->isFPOrFPVector() &&
1288 C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1289 "This is an illegal floating point extension!");
1290 return getFoldedCast(Instruction::FPExt, C, Ty);
1293 Constant *ConstantExpr::getUIToFP(Constant *C, const Type *Ty) {
1295 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1296 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1298 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1299 assert(C->getType()->isIntOrIntVector() && Ty->isFPOrFPVector() &&
1300 "This is an illegal uint to floating point cast!");
1301 return getFoldedCast(Instruction::UIToFP, C, Ty);
1304 Constant *ConstantExpr::getSIToFP(Constant *C, const Type *Ty) {
1306 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1307 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1309 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1310 assert(C->getType()->isIntOrIntVector() && Ty->isFPOrFPVector() &&
1311 "This is an illegal sint to floating point cast!");
1312 return getFoldedCast(Instruction::SIToFP, C, Ty);
1315 Constant *ConstantExpr::getFPToUI(Constant *C, const Type *Ty) {
1317 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1318 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1320 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1321 assert(C->getType()->isFPOrFPVector() && Ty->isIntOrIntVector() &&
1322 "This is an illegal floating point to uint cast!");
1323 return getFoldedCast(Instruction::FPToUI, C, Ty);
1326 Constant *ConstantExpr::getFPToSI(Constant *C, const Type *Ty) {
1328 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1329 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1331 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1332 assert(C->getType()->isFPOrFPVector() && Ty->isIntOrIntVector() &&
1333 "This is an illegal floating point to sint cast!");
1334 return getFoldedCast(Instruction::FPToSI, C, Ty);
1337 Constant *ConstantExpr::getPtrToInt(Constant *C, const Type *DstTy) {
1338 assert(isa<PointerType>(C->getType()) && "PtrToInt source must be pointer");
1339 assert(DstTy->isInteger() && "PtrToInt destination must be integral");
1340 return getFoldedCast(Instruction::PtrToInt, C, DstTy);
1343 Constant *ConstantExpr::getIntToPtr(Constant *C, const Type *DstTy) {
1344 assert(C->getType()->isInteger() && "IntToPtr source must be integral");
1345 assert(isa<PointerType>(DstTy) && "IntToPtr destination must be a pointer");
1346 return getFoldedCast(Instruction::IntToPtr, C, DstTy);
1349 Constant *ConstantExpr::getBitCast(Constant *C, const Type *DstTy) {
1350 assert(CastInst::castIsValid(Instruction::BitCast, C, DstTy) &&
1351 "Invalid constantexpr bitcast!");
1353 // It is common to ask for a bitcast of a value to its own type, handle this
1355 if (C->getType() == DstTy) return C;
1357 return getFoldedCast(Instruction::BitCast, C, DstTy);
1360 Constant *ConstantExpr::getTy(const Type *ReqTy, unsigned Opcode,
1361 Constant *C1, Constant *C2,
1363 // Check the operands for consistency first
1364 assert(Opcode >= Instruction::BinaryOpsBegin &&
1365 Opcode < Instruction::BinaryOpsEnd &&
1366 "Invalid opcode in binary constant expression");
1367 assert(C1->getType() == C2->getType() &&
1368 "Operand types in binary constant expression should match");
1370 if (ReqTy == C1->getType() || ReqTy == Type::getInt1Ty(ReqTy->getContext()))
1371 if (Constant *FC = ConstantFoldBinaryInstruction(ReqTy->getContext(),
1373 return FC; // Fold a few common cases...
1375 std::vector<Constant*> argVec(1, C1); argVec.push_back(C2);
1376 ExprMapKeyType Key(Opcode, argVec, 0, Flags);
1378 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1379 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1382 Constant *ConstantExpr::getCompareTy(unsigned short predicate,
1383 Constant *C1, Constant *C2) {
1384 switch (predicate) {
1385 default: llvm_unreachable("Invalid CmpInst predicate");
1386 case CmpInst::FCMP_FALSE: case CmpInst::FCMP_OEQ: case CmpInst::FCMP_OGT:
1387 case CmpInst::FCMP_OGE: case CmpInst::FCMP_OLT: case CmpInst::FCMP_OLE:
1388 case CmpInst::FCMP_ONE: case CmpInst::FCMP_ORD: case CmpInst::FCMP_UNO:
1389 case CmpInst::FCMP_UEQ: case CmpInst::FCMP_UGT: case CmpInst::FCMP_UGE:
1390 case CmpInst::FCMP_ULT: case CmpInst::FCMP_ULE: case CmpInst::FCMP_UNE:
1391 case CmpInst::FCMP_TRUE:
1392 return getFCmp(predicate, C1, C2);
1394 case CmpInst::ICMP_EQ: case CmpInst::ICMP_NE: case CmpInst::ICMP_UGT:
1395 case CmpInst::ICMP_UGE: case CmpInst::ICMP_ULT: case CmpInst::ICMP_ULE:
1396 case CmpInst::ICMP_SGT: case CmpInst::ICMP_SGE: case CmpInst::ICMP_SLT:
1397 case CmpInst::ICMP_SLE:
1398 return getICmp(predicate, C1, C2);
1402 Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2,
1404 // API compatibility: Adjust integer opcodes to floating-point opcodes.
1405 if (C1->getType()->isFPOrFPVector()) {
1406 if (Opcode == Instruction::Add) Opcode = Instruction::FAdd;
1407 else if (Opcode == Instruction::Sub) Opcode = Instruction::FSub;
1408 else if (Opcode == Instruction::Mul) Opcode = Instruction::FMul;
1412 case Instruction::Add:
1413 case Instruction::Sub:
1414 case Instruction::Mul:
1415 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1416 assert(C1->getType()->isIntOrIntVector() &&
1417 "Tried to create an integer operation on a non-integer type!");
1419 case Instruction::FAdd:
1420 case Instruction::FSub:
1421 case Instruction::FMul:
1422 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1423 assert(C1->getType()->isFPOrFPVector() &&
1424 "Tried to create a floating-point operation on a "
1425 "non-floating-point type!");
1427 case Instruction::UDiv:
1428 case Instruction::SDiv:
1429 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1430 assert(C1->getType()->isIntOrIntVector() &&
1431 "Tried to create an arithmetic operation on a non-arithmetic type!");
1433 case Instruction::FDiv:
1434 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1435 assert(C1->getType()->isFPOrFPVector() &&
1436 "Tried to create an arithmetic operation on a non-arithmetic type!");
1438 case Instruction::URem:
1439 case Instruction::SRem:
1440 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1441 assert(C1->getType()->isIntOrIntVector() &&
1442 "Tried to create an arithmetic operation on a non-arithmetic type!");
1444 case Instruction::FRem:
1445 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1446 assert(C1->getType()->isFPOrFPVector() &&
1447 "Tried to create an arithmetic operation on a non-arithmetic type!");
1449 case Instruction::And:
1450 case Instruction::Or:
1451 case Instruction::Xor:
1452 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1453 assert(C1->getType()->isIntOrIntVector() &&
1454 "Tried to create a logical operation on a non-integral type!");
1456 case Instruction::Shl:
1457 case Instruction::LShr:
1458 case Instruction::AShr:
1459 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1460 assert(C1->getType()->isIntOrIntVector() &&
1461 "Tried to create a shift operation on a non-integer type!");
1468 return getTy(C1->getType(), Opcode, C1, C2, Flags);
1471 Constant* ConstantExpr::getSizeOf(const Type* Ty) {
1472 // sizeof is implemented as: (i64) gep (Ty*)null, 1
1473 // Note that a non-inbounds gep is used, as null isn't within any object.
1474 Constant *GEPIdx = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1475 Constant *GEP = getGetElementPtr(
1476 Constant::getNullValue(PointerType::getUnqual(Ty)), &GEPIdx, 1);
1477 return getCast(Instruction::PtrToInt, GEP,
1478 Type::getInt64Ty(Ty->getContext()));
1481 Constant* ConstantExpr::getAlignOf(const Type* Ty) {
1482 // alignof is implemented as: (i64) gep ({i1,Ty}*)null, 0, 1
1483 // Note that a non-inbounds gep is used, as null isn't within any object.
1484 const Type *AligningTy = StructType::get(Ty->getContext(),
1485 Type::getInt1Ty(Ty->getContext()), Ty, NULL);
1486 Constant *NullPtr = Constant::getNullValue(AligningTy->getPointerTo());
1487 Constant *Zero = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 0);
1488 Constant *One = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1489 Constant *Indices[2] = { Zero, One };
1490 Constant *GEP = getGetElementPtr(NullPtr, Indices, 2);
1491 return getCast(Instruction::PtrToInt, GEP,
1492 Type::getInt32Ty(Ty->getContext()));
1495 Constant* ConstantExpr::getOffsetOf(const StructType* STy, unsigned FieldNo) {
1496 // offsetof is implemented as: (i64) gep (Ty*)null, 0, FieldNo
1497 // Note that a non-inbounds gep is used, as null isn't within any object.
1498 Constant *GEPIdx[] = {
1499 ConstantInt::get(Type::getInt64Ty(STy->getContext()), 0),
1500 ConstantInt::get(Type::getInt32Ty(STy->getContext()), FieldNo)
1502 Constant *GEP = getGetElementPtr(
1503 Constant::getNullValue(PointerType::getUnqual(STy)), GEPIdx, 2);
1504 return getCast(Instruction::PtrToInt, GEP,
1505 Type::getInt64Ty(STy->getContext()));
1508 Constant *ConstantExpr::getCompare(unsigned short pred,
1509 Constant *C1, Constant *C2) {
1510 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1511 return getCompareTy(pred, C1, C2);
1514 Constant *ConstantExpr::getSelectTy(const Type *ReqTy, Constant *C,
1515 Constant *V1, Constant *V2) {
1516 assert(!SelectInst::areInvalidOperands(C, V1, V2)&&"Invalid select operands");
1518 if (ReqTy == V1->getType())
1519 if (Constant *SC = ConstantFoldSelectInstruction(
1520 ReqTy->getContext(), C, V1, V2))
1521 return SC; // Fold common cases
1523 std::vector<Constant*> argVec(3, C);
1526 ExprMapKeyType Key(Instruction::Select, argVec);
1528 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1529 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1532 Constant *ConstantExpr::getGetElementPtrTy(const Type *ReqTy, Constant *C,
1535 assert(GetElementPtrInst::getIndexedType(C->getType(), Idxs,
1537 cast<PointerType>(ReqTy)->getElementType() &&
1538 "GEP indices invalid!");
1540 if (Constant *FC = ConstantFoldGetElementPtr(
1541 ReqTy->getContext(), C, /*inBounds=*/false,
1542 (Constant**)Idxs, NumIdx))
1543 return FC; // Fold a few common cases...
1545 assert(isa<PointerType>(C->getType()) &&
1546 "Non-pointer type for constant GetElementPtr expression");
1547 // Look up the constant in the table first to ensure uniqueness
1548 std::vector<Constant*> ArgVec;
1549 ArgVec.reserve(NumIdx+1);
1550 ArgVec.push_back(C);
1551 for (unsigned i = 0; i != NumIdx; ++i)
1552 ArgVec.push_back(cast<Constant>(Idxs[i]));
1553 const ExprMapKeyType Key(Instruction::GetElementPtr, ArgVec);
1555 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1556 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1559 Constant *ConstantExpr::getInBoundsGetElementPtrTy(const Type *ReqTy,
1563 assert(GetElementPtrInst::getIndexedType(C->getType(), Idxs,
1565 cast<PointerType>(ReqTy)->getElementType() &&
1566 "GEP indices invalid!");
1568 if (Constant *FC = ConstantFoldGetElementPtr(
1569 ReqTy->getContext(), C, /*inBounds=*/true,
1570 (Constant**)Idxs, NumIdx))
1571 return FC; // Fold a few common cases...
1573 assert(isa<PointerType>(C->getType()) &&
1574 "Non-pointer type for constant GetElementPtr expression");
1575 // Look up the constant in the table first to ensure uniqueness
1576 std::vector<Constant*> ArgVec;
1577 ArgVec.reserve(NumIdx+1);
1578 ArgVec.push_back(C);
1579 for (unsigned i = 0; i != NumIdx; ++i)
1580 ArgVec.push_back(cast<Constant>(Idxs[i]));
1581 const ExprMapKeyType Key(Instruction::GetElementPtr, ArgVec, 0,
1582 GEPOperator::IsInBounds);
1584 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1585 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1588 Constant *ConstantExpr::getGetElementPtr(Constant *C, Value* const *Idxs,
1590 // Get the result type of the getelementptr!
1592 GetElementPtrInst::getIndexedType(C->getType(), Idxs, Idxs+NumIdx);
1593 assert(Ty && "GEP indices invalid!");
1594 unsigned As = cast<PointerType>(C->getType())->getAddressSpace();
1595 return getGetElementPtrTy(PointerType::get(Ty, As), C, Idxs, NumIdx);
1598 Constant *ConstantExpr::getInBoundsGetElementPtr(Constant *C,
1601 // Get the result type of the getelementptr!
1603 GetElementPtrInst::getIndexedType(C->getType(), Idxs, Idxs+NumIdx);
1604 assert(Ty && "GEP indices invalid!");
1605 unsigned As = cast<PointerType>(C->getType())->getAddressSpace();
1606 return getInBoundsGetElementPtrTy(PointerType::get(Ty, As), C, Idxs, NumIdx);
1609 Constant *ConstantExpr::getGetElementPtr(Constant *C, Constant* const *Idxs,
1611 return getGetElementPtr(C, (Value* const *)Idxs, NumIdx);
1614 Constant *ConstantExpr::getInBoundsGetElementPtr(Constant *C,
1615 Constant* const *Idxs,
1617 return getInBoundsGetElementPtr(C, (Value* const *)Idxs, NumIdx);
1621 ConstantExpr::getICmp(unsigned short pred, Constant *LHS, Constant *RHS) {
1622 assert(LHS->getType() == RHS->getType());
1623 assert(pred >= ICmpInst::FIRST_ICMP_PREDICATE &&
1624 pred <= ICmpInst::LAST_ICMP_PREDICATE && "Invalid ICmp Predicate");
1626 if (Constant *FC = ConstantFoldCompareInstruction(
1627 LHS->getContext(), pred, LHS, RHS))
1628 return FC; // Fold a few common cases...
1630 // Look up the constant in the table first to ensure uniqueness
1631 std::vector<Constant*> ArgVec;
1632 ArgVec.push_back(LHS);
1633 ArgVec.push_back(RHS);
1634 // Get the key type with both the opcode and predicate
1635 const ExprMapKeyType Key(Instruction::ICmp, ArgVec, pred);
1637 const Type *ResultTy = Type::getInt1Ty(LHS->getContext());
1638 if (const VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
1639 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
1641 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
1642 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
1646 ConstantExpr::getFCmp(unsigned short pred, Constant *LHS, Constant *RHS) {
1647 assert(LHS->getType() == RHS->getType());
1648 assert(pred <= FCmpInst::LAST_FCMP_PREDICATE && "Invalid FCmp Predicate");
1650 if (Constant *FC = ConstantFoldCompareInstruction(
1651 LHS->getContext(), pred, LHS, RHS))
1652 return FC; // Fold a few common cases...
1654 // Look up the constant in the table first to ensure uniqueness
1655 std::vector<Constant*> ArgVec;
1656 ArgVec.push_back(LHS);
1657 ArgVec.push_back(RHS);
1658 // Get the key type with both the opcode and predicate
1659 const ExprMapKeyType Key(Instruction::FCmp, ArgVec, pred);
1661 const Type *ResultTy = Type::getInt1Ty(LHS->getContext());
1662 if (const VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
1663 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
1665 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
1666 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
1669 Constant *ConstantExpr::getExtractElementTy(const Type *ReqTy, Constant *Val,
1671 if (Constant *FC = ConstantFoldExtractElementInstruction(
1672 ReqTy->getContext(), Val, Idx))
1673 return FC; // Fold a few common cases.
1674 // Look up the constant in the table first to ensure uniqueness
1675 std::vector<Constant*> ArgVec(1, Val);
1676 ArgVec.push_back(Idx);
1677 const ExprMapKeyType Key(Instruction::ExtractElement,ArgVec);
1679 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1680 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1683 Constant *ConstantExpr::getExtractElement(Constant *Val, Constant *Idx) {
1684 assert(isa<VectorType>(Val->getType()) &&
1685 "Tried to create extractelement operation on non-vector type!");
1686 assert(Idx->getType()->isInteger(32) &&
1687 "Extractelement index must be i32 type!");
1688 return getExtractElementTy(cast<VectorType>(Val->getType())->getElementType(),
1692 Constant *ConstantExpr::getInsertElementTy(const Type *ReqTy, Constant *Val,
1693 Constant *Elt, Constant *Idx) {
1694 if (Constant *FC = ConstantFoldInsertElementInstruction(
1695 ReqTy->getContext(), Val, Elt, Idx))
1696 return FC; // Fold a few common cases.
1697 // Look up the constant in the table first to ensure uniqueness
1698 std::vector<Constant*> ArgVec(1, Val);
1699 ArgVec.push_back(Elt);
1700 ArgVec.push_back(Idx);
1701 const ExprMapKeyType Key(Instruction::InsertElement,ArgVec);
1703 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1704 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1707 Constant *ConstantExpr::getInsertElement(Constant *Val, Constant *Elt,
1709 assert(isa<VectorType>(Val->getType()) &&
1710 "Tried to create insertelement operation on non-vector type!");
1711 assert(Elt->getType() == cast<VectorType>(Val->getType())->getElementType()
1712 && "Insertelement types must match!");
1713 assert(Idx->getType()->isInteger(32) &&
1714 "Insertelement index must be i32 type!");
1715 return getInsertElementTy(Val->getType(), Val, Elt, Idx);
1718 Constant *ConstantExpr::getShuffleVectorTy(const Type *ReqTy, Constant *V1,
1719 Constant *V2, Constant *Mask) {
1720 if (Constant *FC = ConstantFoldShuffleVectorInstruction(
1721 ReqTy->getContext(), V1, V2, Mask))
1722 return FC; // Fold a few common cases...
1723 // Look up the constant in the table first to ensure uniqueness
1724 std::vector<Constant*> ArgVec(1, V1);
1725 ArgVec.push_back(V2);
1726 ArgVec.push_back(Mask);
1727 const ExprMapKeyType Key(Instruction::ShuffleVector,ArgVec);
1729 LLVMContextImpl *pImpl = ReqTy->getContext().pImpl;
1730 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1733 Constant *ConstantExpr::getShuffleVector(Constant *V1, Constant *V2,
1735 assert(ShuffleVectorInst::isValidOperands(V1, V2, Mask) &&
1736 "Invalid shuffle vector constant expr operands!");
1738 unsigned NElts = cast<VectorType>(Mask->getType())->getNumElements();
1739 const Type *EltTy = cast<VectorType>(V1->getType())->getElementType();
1740 const Type *ShufTy = VectorType::get(EltTy, NElts);
1741 return getShuffleVectorTy(ShufTy, V1, V2, Mask);
1744 Constant *ConstantExpr::getInsertValueTy(const Type *ReqTy, Constant *Agg,
1746 const unsigned *Idxs, unsigned NumIdx) {
1747 assert(ExtractValueInst::getIndexedType(Agg->getType(), Idxs,
1748 Idxs+NumIdx) == Val->getType() &&
1749 "insertvalue indices invalid!");
1750 assert(Agg->getType() == ReqTy &&
1751 "insertvalue type invalid!");
1752 assert(Agg->getType()->isFirstClassType() &&
1753 "Non-first-class type for constant InsertValue expression");
1754 Constant *FC = ConstantFoldInsertValueInstruction(
1755 ReqTy->getContext(), Agg, Val, Idxs, NumIdx);
1756 assert(FC && "InsertValue constant expr couldn't be folded!");
1760 Constant *ConstantExpr::getInsertValue(Constant *Agg, Constant *Val,
1761 const unsigned *IdxList, unsigned NumIdx) {
1762 assert(Agg->getType()->isFirstClassType() &&
1763 "Tried to create insertelement operation on non-first-class type!");
1765 const Type *ReqTy = Agg->getType();
1768 ExtractValueInst::getIndexedType(Agg->getType(), IdxList, IdxList+NumIdx);
1770 assert(ValTy == Val->getType() && "insertvalue indices invalid!");
1771 return getInsertValueTy(ReqTy, Agg, Val, IdxList, NumIdx);
1774 Constant *ConstantExpr::getExtractValueTy(const Type *ReqTy, Constant *Agg,
1775 const unsigned *Idxs, unsigned NumIdx) {
1776 assert(ExtractValueInst::getIndexedType(Agg->getType(), Idxs,
1777 Idxs+NumIdx) == ReqTy &&
1778 "extractvalue indices invalid!");
1779 assert(Agg->getType()->isFirstClassType() &&
1780 "Non-first-class type for constant extractvalue expression");
1781 Constant *FC = ConstantFoldExtractValueInstruction(
1782 ReqTy->getContext(), Agg, Idxs, NumIdx);
1783 assert(FC && "ExtractValue constant expr couldn't be folded!");
1787 Constant *ConstantExpr::getExtractValue(Constant *Agg,
1788 const unsigned *IdxList, unsigned NumIdx) {
1789 assert(Agg->getType()->isFirstClassType() &&
1790 "Tried to create extractelement operation on non-first-class type!");
1793 ExtractValueInst::getIndexedType(Agg->getType(), IdxList, IdxList+NumIdx);
1794 assert(ReqTy && "extractvalue indices invalid!");
1795 return getExtractValueTy(ReqTy, Agg, IdxList, NumIdx);
1798 Constant* ConstantExpr::getNeg(Constant* C) {
1799 // API compatibility: Adjust integer opcodes to floating-point opcodes.
1800 if (C->getType()->isFPOrFPVector())
1802 assert(C->getType()->isIntOrIntVector() &&
1803 "Cannot NEG a nonintegral value!");
1804 return get(Instruction::Sub,
1805 ConstantFP::getZeroValueForNegation(C->getType()),
1809 Constant* ConstantExpr::getFNeg(Constant* C) {
1810 assert(C->getType()->isFPOrFPVector() &&
1811 "Cannot FNEG a non-floating-point value!");
1812 return get(Instruction::FSub,
1813 ConstantFP::getZeroValueForNegation(C->getType()),
1817 Constant* ConstantExpr::getNot(Constant* C) {
1818 assert(C->getType()->isIntOrIntVector() &&
1819 "Cannot NOT a nonintegral value!");
1820 return get(Instruction::Xor, C, Constant::getAllOnesValue(C->getType()));
1823 Constant* ConstantExpr::getAdd(Constant* C1, Constant* C2) {
1824 return get(Instruction::Add, C1, C2);
1827 Constant* ConstantExpr::getFAdd(Constant* C1, Constant* C2) {
1828 return get(Instruction::FAdd, C1, C2);
1831 Constant* ConstantExpr::getSub(Constant* C1, Constant* C2) {
1832 return get(Instruction::Sub, C1, C2);
1835 Constant* ConstantExpr::getFSub(Constant* C1, Constant* C2) {
1836 return get(Instruction::FSub, C1, C2);
1839 Constant* ConstantExpr::getMul(Constant* C1, Constant* C2) {
1840 return get(Instruction::Mul, C1, C2);
1843 Constant* ConstantExpr::getFMul(Constant* C1, Constant* C2) {
1844 return get(Instruction::FMul, C1, C2);
1847 Constant* ConstantExpr::getUDiv(Constant* C1, Constant* C2) {
1848 return get(Instruction::UDiv, C1, C2);
1851 Constant* ConstantExpr::getSDiv(Constant* C1, Constant* C2) {
1852 return get(Instruction::SDiv, C1, C2);
1855 Constant* ConstantExpr::getFDiv(Constant* C1, Constant* C2) {
1856 return get(Instruction::FDiv, C1, C2);
1859 Constant* ConstantExpr::getURem(Constant* C1, Constant* C2) {
1860 return get(Instruction::URem, C1, C2);
1863 Constant* ConstantExpr::getSRem(Constant* C1, Constant* C2) {
1864 return get(Instruction::SRem, C1, C2);
1867 Constant* ConstantExpr::getFRem(Constant* C1, Constant* C2) {
1868 return get(Instruction::FRem, C1, C2);
1871 Constant* ConstantExpr::getAnd(Constant* C1, Constant* C2) {
1872 return get(Instruction::And, C1, C2);
1875 Constant* ConstantExpr::getOr(Constant* C1, Constant* C2) {
1876 return get(Instruction::Or, C1, C2);
1879 Constant* ConstantExpr::getXor(Constant* C1, Constant* C2) {
1880 return get(Instruction::Xor, C1, C2);
1883 Constant* ConstantExpr::getShl(Constant* C1, Constant* C2) {
1884 return get(Instruction::Shl, C1, C2);
1887 Constant* ConstantExpr::getLShr(Constant* C1, Constant* C2) {
1888 return get(Instruction::LShr, C1, C2);
1891 Constant* ConstantExpr::getAShr(Constant* C1, Constant* C2) {
1892 return get(Instruction::AShr, C1, C2);
1895 // destroyConstant - Remove the constant from the constant table...
1897 void ConstantExpr::destroyConstant() {
1898 getType()->getContext().pImpl->ExprConstants.remove(this);
1899 destroyConstantImpl();
1902 const char *ConstantExpr::getOpcodeName() const {
1903 return Instruction::getOpcodeName(getOpcode());
1906 //===----------------------------------------------------------------------===//
1907 // replaceUsesOfWithOnConstant implementations
1909 /// replaceUsesOfWithOnConstant - Update this constant array to change uses of
1910 /// 'From' to be uses of 'To'. This must update the uniquing data structures
1913 /// Note that we intentionally replace all uses of From with To here. Consider
1914 /// a large array that uses 'From' 1000 times. By handling this case all here,
1915 /// ConstantArray::replaceUsesOfWithOnConstant is only invoked once, and that
1916 /// single invocation handles all 1000 uses. Handling them one at a time would
1917 /// work, but would be really slow because it would have to unique each updated
1920 void ConstantArray::replaceUsesOfWithOnConstant(Value *From, Value *To,
1922 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
1923 Constant *ToC = cast<Constant>(To);
1925 LLVMContext &Context = getType()->getContext();
1926 LLVMContextImpl *pImpl = Context.pImpl;
1928 std::pair<LLVMContextImpl::ArrayConstantsTy::MapKey, ConstantArray*> Lookup;
1929 Lookup.first.first = getType();
1930 Lookup.second = this;
1932 std::vector<Constant*> &Values = Lookup.first.second;
1933 Values.reserve(getNumOperands()); // Build replacement array.
1935 // Fill values with the modified operands of the constant array. Also,
1936 // compute whether this turns into an all-zeros array.
1937 bool isAllZeros = false;
1938 unsigned NumUpdated = 0;
1939 if (!ToC->isNullValue()) {
1940 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
1941 Constant *Val = cast<Constant>(O->get());
1946 Values.push_back(Val);
1950 for (Use *O = OperandList, *E = OperandList+getNumOperands();O != E; ++O) {
1951 Constant *Val = cast<Constant>(O->get());
1956 Values.push_back(Val);
1957 if (isAllZeros) isAllZeros = Val->isNullValue();
1961 Constant *Replacement = 0;
1963 Replacement = ConstantAggregateZero::get(getType());
1965 // Check to see if we have this array type already.
1967 LLVMContextImpl::ArrayConstantsTy::MapTy::iterator I =
1968 pImpl->ArrayConstants.InsertOrGetItem(Lookup, Exists);
1971 Replacement = I->second;
1973 // Okay, the new shape doesn't exist in the system yet. Instead of
1974 // creating a new constant array, inserting it, replaceallusesof'ing the
1975 // old with the new, then deleting the old... just update the current one
1977 pImpl->ArrayConstants.MoveConstantToNewSlot(this, I);
1979 // Update to the new value. Optimize for the case when we have a single
1980 // operand that we're changing, but handle bulk updates efficiently.
1981 if (NumUpdated == 1) {
1982 unsigned OperandToUpdate = U - OperandList;
1983 assert(getOperand(OperandToUpdate) == From &&
1984 "ReplaceAllUsesWith broken!");
1985 setOperand(OperandToUpdate, ToC);
1987 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
1988 if (getOperand(i) == From)
1995 // Otherwise, I do need to replace this with an existing value.
1996 assert(Replacement != this && "I didn't contain From!");
1998 // Everyone using this now uses the replacement.
1999 uncheckedReplaceAllUsesWith(Replacement);
2001 // Delete the old constant!
2005 void ConstantStruct::replaceUsesOfWithOnConstant(Value *From, Value *To,
2007 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2008 Constant *ToC = cast<Constant>(To);
2010 unsigned OperandToUpdate = U-OperandList;
2011 assert(getOperand(OperandToUpdate) == From && "ReplaceAllUsesWith broken!");
2013 std::pair<LLVMContextImpl::StructConstantsTy::MapKey, ConstantStruct*> Lookup;
2014 Lookup.first.first = getType();
2015 Lookup.second = this;
2016 std::vector<Constant*> &Values = Lookup.first.second;
2017 Values.reserve(getNumOperands()); // Build replacement struct.
2020 // Fill values with the modified operands of the constant struct. Also,
2021 // compute whether this turns into an all-zeros struct.
2022 bool isAllZeros = false;
2023 if (!ToC->isNullValue()) {
2024 for (Use *O = OperandList, *E = OperandList + getNumOperands(); O != E; ++O)
2025 Values.push_back(cast<Constant>(O->get()));
2028 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2029 Constant *Val = cast<Constant>(O->get());
2030 Values.push_back(Val);
2031 if (isAllZeros) isAllZeros = Val->isNullValue();
2034 Values[OperandToUpdate] = ToC;
2036 LLVMContext &Context = getType()->getContext();
2037 LLVMContextImpl *pImpl = Context.pImpl;
2039 Constant *Replacement = 0;
2041 Replacement = ConstantAggregateZero::get(getType());
2043 // Check to see if we have this array type already.
2045 LLVMContextImpl::StructConstantsTy::MapTy::iterator I =
2046 pImpl->StructConstants.InsertOrGetItem(Lookup, Exists);
2049 Replacement = I->second;
2051 // Okay, the new shape doesn't exist in the system yet. Instead of
2052 // creating a new constant struct, inserting it, replaceallusesof'ing the
2053 // old with the new, then deleting the old... just update the current one
2055 pImpl->StructConstants.MoveConstantToNewSlot(this, I);
2057 // Update to the new value.
2058 setOperand(OperandToUpdate, ToC);
2063 assert(Replacement != this && "I didn't contain From!");
2065 // Everyone using this now uses the replacement.
2066 uncheckedReplaceAllUsesWith(Replacement);
2068 // Delete the old constant!
2072 void ConstantVector::replaceUsesOfWithOnConstant(Value *From, Value *To,
2074 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2076 std::vector<Constant*> Values;
2077 Values.reserve(getNumOperands()); // Build replacement array...
2078 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
2079 Constant *Val = getOperand(i);
2080 if (Val == From) Val = cast<Constant>(To);
2081 Values.push_back(Val);
2084 Constant *Replacement = get(getType(), Values);
2085 assert(Replacement != this && "I didn't contain From!");
2087 // Everyone using this now uses the replacement.
2088 uncheckedReplaceAllUsesWith(Replacement);
2090 // Delete the old constant!
2094 void ConstantExpr::replaceUsesOfWithOnConstant(Value *From, Value *ToV,
2096 assert(isa<Constant>(ToV) && "Cannot make Constant refer to non-constant!");
2097 Constant *To = cast<Constant>(ToV);
2099 Constant *Replacement = 0;
2100 if (getOpcode() == Instruction::GetElementPtr) {
2101 SmallVector<Constant*, 8> Indices;
2102 Constant *Pointer = getOperand(0);
2103 Indices.reserve(getNumOperands()-1);
2104 if (Pointer == From) Pointer = To;
2106 for (unsigned i = 1, e = getNumOperands(); i != e; ++i) {
2107 Constant *Val = getOperand(i);
2108 if (Val == From) Val = To;
2109 Indices.push_back(Val);
2111 Replacement = ConstantExpr::getGetElementPtr(Pointer,
2112 &Indices[0], Indices.size());
2113 } else if (getOpcode() == Instruction::ExtractValue) {
2114 Constant *Agg = getOperand(0);
2115 if (Agg == From) Agg = To;
2117 const SmallVector<unsigned, 4> &Indices = getIndices();
2118 Replacement = ConstantExpr::getExtractValue(Agg,
2119 &Indices[0], Indices.size());
2120 } else if (getOpcode() == Instruction::InsertValue) {
2121 Constant *Agg = getOperand(0);
2122 Constant *Val = getOperand(1);
2123 if (Agg == From) Agg = To;
2124 if (Val == From) Val = To;
2126 const SmallVector<unsigned, 4> &Indices = getIndices();
2127 Replacement = ConstantExpr::getInsertValue(Agg, Val,
2128 &Indices[0], Indices.size());
2129 } else if (isCast()) {
2130 assert(getOperand(0) == From && "Cast only has one use!");
2131 Replacement = ConstantExpr::getCast(getOpcode(), To, getType());
2132 } else if (getOpcode() == Instruction::Select) {
2133 Constant *C1 = getOperand(0);
2134 Constant *C2 = getOperand(1);
2135 Constant *C3 = getOperand(2);
2136 if (C1 == From) C1 = To;
2137 if (C2 == From) C2 = To;
2138 if (C3 == From) C3 = To;
2139 Replacement = ConstantExpr::getSelect(C1, C2, C3);
2140 } else if (getOpcode() == Instruction::ExtractElement) {
2141 Constant *C1 = getOperand(0);
2142 Constant *C2 = getOperand(1);
2143 if (C1 == From) C1 = To;
2144 if (C2 == From) C2 = To;
2145 Replacement = ConstantExpr::getExtractElement(C1, C2);
2146 } else if (getOpcode() == Instruction::InsertElement) {
2147 Constant *C1 = getOperand(0);
2148 Constant *C2 = getOperand(1);
2149 Constant *C3 = getOperand(1);
2150 if (C1 == From) C1 = To;
2151 if (C2 == From) C2 = To;
2152 if (C3 == From) C3 = To;
2153 Replacement = ConstantExpr::getInsertElement(C1, C2, C3);
2154 } else if (getOpcode() == Instruction::ShuffleVector) {
2155 Constant *C1 = getOperand(0);
2156 Constant *C2 = getOperand(1);
2157 Constant *C3 = getOperand(2);
2158 if (C1 == From) C1 = To;
2159 if (C2 == From) C2 = To;
2160 if (C3 == From) C3 = To;
2161 Replacement = ConstantExpr::getShuffleVector(C1, C2, C3);
2162 } else if (isCompare()) {
2163 Constant *C1 = getOperand(0);
2164 Constant *C2 = getOperand(1);
2165 if (C1 == From) C1 = To;
2166 if (C2 == From) C2 = To;
2167 if (getOpcode() == Instruction::ICmp)
2168 Replacement = ConstantExpr::getICmp(getPredicate(), C1, C2);
2170 assert(getOpcode() == Instruction::FCmp);
2171 Replacement = ConstantExpr::getFCmp(getPredicate(), C1, C2);
2173 } else if (getNumOperands() == 2) {
2174 Constant *C1 = getOperand(0);
2175 Constant *C2 = getOperand(1);
2176 if (C1 == From) C1 = To;
2177 if (C2 == From) C2 = To;
2178 Replacement = ConstantExpr::get(getOpcode(), C1, C2, SubclassOptionalData);
2180 llvm_unreachable("Unknown ConstantExpr type!");
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!