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/IR/Constants.h"
15 #include "ConstantFold.h"
16 #include "LLVMContextImpl.h"
17 #include "llvm/ADT/DenseMap.h"
18 #include "llvm/ADT/FoldingSet.h"
19 #include "llvm/ADT/STLExtras.h"
20 #include "llvm/ADT/SmallVector.h"
21 #include "llvm/ADT/StringExtras.h"
22 #include "llvm/ADT/StringMap.h"
23 #include "llvm/IR/DerivedTypes.h"
24 #include "llvm/IR/GetElementPtrTypeIterator.h"
25 #include "llvm/IR/GlobalValue.h"
26 #include "llvm/IR/Instructions.h"
27 #include "llvm/IR/Module.h"
28 #include "llvm/IR/Operator.h"
29 #include "llvm/Support/Compiler.h"
30 #include "llvm/Support/Debug.h"
31 #include "llvm/Support/ErrorHandling.h"
32 #include "llvm/Support/ManagedStatic.h"
33 #include "llvm/Support/MathExtras.h"
34 #include "llvm/Support/raw_ostream.h"
39 //===----------------------------------------------------------------------===//
41 //===----------------------------------------------------------------------===//
43 void Constant::anchor() { }
45 bool Constant::isNegativeZeroValue() const {
46 // Floating point values have an explicit -0.0 value.
47 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
48 return CFP->isZero() && CFP->isNegative();
50 // Equivalent for a vector of -0.0's.
51 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
52 if (ConstantFP *SplatCFP = dyn_cast_or_null<ConstantFP>(CV->getSplatValue()))
53 if (SplatCFP && SplatCFP->isZero() && SplatCFP->isNegative())
56 // We've already handled true FP case; any other FP vectors can't represent -0.0.
57 if (getType()->isFPOrFPVectorTy())
60 // Otherwise, just use +0.0.
64 // Return true iff this constant is positive zero (floating point), negative
65 // zero (floating point), or a null value.
66 bool Constant::isZeroValue() const {
67 // Floating point values have an explicit -0.0 value.
68 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
71 // Otherwise, just use +0.0.
75 bool Constant::isNullValue() const {
77 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
81 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
82 return CFP->isZero() && !CFP->isNegative();
84 // constant zero is zero for aggregates and cpnull is null for pointers.
85 return isa<ConstantAggregateZero>(this) || isa<ConstantPointerNull>(this);
88 bool Constant::isAllOnesValue() const {
89 // Check for -1 integers
90 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
91 return CI->isMinusOne();
93 // Check for FP which are bitcasted from -1 integers
94 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
95 return CFP->getValueAPF().bitcastToAPInt().isAllOnesValue();
97 // Check for constant vectors which are splats of -1 values.
98 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
99 if (Constant *Splat = CV->getSplatValue())
100 return Splat->isAllOnesValue();
102 // Check for constant vectors which are splats of -1 values.
103 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
104 if (Constant *Splat = CV->getSplatValue())
105 return Splat->isAllOnesValue();
110 bool Constant::isOneValue() const {
111 // Check for 1 integers
112 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
115 // Check for FP which are bitcasted from 1 integers
116 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
117 return CFP->getValueAPF().bitcastToAPInt() == 1;
119 // Check for constant vectors which are splats of 1 values.
120 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
121 if (Constant *Splat = CV->getSplatValue())
122 return Splat->isOneValue();
124 // Check for constant vectors which are splats of 1 values.
125 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
126 if (Constant *Splat = CV->getSplatValue())
127 return Splat->isOneValue();
132 bool Constant::isMinSignedValue() const {
133 // Check for INT_MIN integers
134 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
135 return CI->isMinValue(/*isSigned=*/true);
137 // Check for FP which are bitcasted from INT_MIN integers
138 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
139 return CFP->getValueAPF().bitcastToAPInt().isMinSignedValue();
141 // Check for constant vectors which are splats of INT_MIN values.
142 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
143 if (Constant *Splat = CV->getSplatValue())
144 return Splat->isMinSignedValue();
146 // Check for constant vectors which are splats of INT_MIN values.
147 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
148 if (Constant *Splat = CV->getSplatValue())
149 return Splat->isMinSignedValue();
154 bool Constant::isNotMinSignedValue() const {
155 // Check for INT_MIN integers
156 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
157 return !CI->isMinValue(/*isSigned=*/true);
159 // Check for FP which are bitcasted from INT_MIN integers
160 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
161 return !CFP->getValueAPF().bitcastToAPInt().isMinSignedValue();
163 // Check for constant vectors which are splats of INT_MIN values.
164 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
165 if (Constant *Splat = CV->getSplatValue())
166 return Splat->isNotMinSignedValue();
168 // Check for constant vectors which are splats of INT_MIN values.
169 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
170 if (Constant *Splat = CV->getSplatValue())
171 return Splat->isNotMinSignedValue();
173 // It *may* contain INT_MIN, we can't tell.
177 // Constructor to create a '0' constant of arbitrary type...
178 Constant *Constant::getNullValue(Type *Ty) {
179 switch (Ty->getTypeID()) {
180 case Type::IntegerTyID:
181 return ConstantInt::get(Ty, 0);
183 return ConstantFP::get(Ty->getContext(),
184 APFloat::getZero(APFloat::IEEEhalf));
185 case Type::FloatTyID:
186 return ConstantFP::get(Ty->getContext(),
187 APFloat::getZero(APFloat::IEEEsingle));
188 case Type::DoubleTyID:
189 return ConstantFP::get(Ty->getContext(),
190 APFloat::getZero(APFloat::IEEEdouble));
191 case Type::X86_FP80TyID:
192 return ConstantFP::get(Ty->getContext(),
193 APFloat::getZero(APFloat::x87DoubleExtended));
194 case Type::FP128TyID:
195 return ConstantFP::get(Ty->getContext(),
196 APFloat::getZero(APFloat::IEEEquad));
197 case Type::PPC_FP128TyID:
198 return ConstantFP::get(Ty->getContext(),
199 APFloat(APFloat::PPCDoubleDouble,
200 APInt::getNullValue(128)));
201 case Type::PointerTyID:
202 return ConstantPointerNull::get(cast<PointerType>(Ty));
203 case Type::StructTyID:
204 case Type::ArrayTyID:
205 case Type::VectorTyID:
206 return ConstantAggregateZero::get(Ty);
208 // Function, Label, or Opaque type?
209 llvm_unreachable("Cannot create a null constant of that type!");
213 Constant *Constant::getIntegerValue(Type *Ty, const APInt &V) {
214 Type *ScalarTy = Ty->getScalarType();
216 // Create the base integer constant.
217 Constant *C = ConstantInt::get(Ty->getContext(), V);
219 // Convert an integer to a pointer, if necessary.
220 if (PointerType *PTy = dyn_cast<PointerType>(ScalarTy))
221 C = ConstantExpr::getIntToPtr(C, PTy);
223 // Broadcast a scalar to a vector, if necessary.
224 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
225 C = ConstantVector::getSplat(VTy->getNumElements(), C);
230 Constant *Constant::getAllOnesValue(Type *Ty) {
231 if (IntegerType *ITy = dyn_cast<IntegerType>(Ty))
232 return ConstantInt::get(Ty->getContext(),
233 APInt::getAllOnesValue(ITy->getBitWidth()));
235 if (Ty->isFloatingPointTy()) {
236 APFloat FL = APFloat::getAllOnesValue(Ty->getPrimitiveSizeInBits(),
237 !Ty->isPPC_FP128Ty());
238 return ConstantFP::get(Ty->getContext(), FL);
241 VectorType *VTy = cast<VectorType>(Ty);
242 return ConstantVector::getSplat(VTy->getNumElements(),
243 getAllOnesValue(VTy->getElementType()));
246 /// getAggregateElement - For aggregates (struct/array/vector) return the
247 /// constant that corresponds to the specified element if possible, or null if
248 /// not. This can return null if the element index is a ConstantExpr, or if
249 /// 'this' is a constant expr.
250 Constant *Constant::getAggregateElement(unsigned Elt) const {
251 if (const ConstantStruct *CS = dyn_cast<ConstantStruct>(this))
252 return Elt < CS->getNumOperands() ? CS->getOperand(Elt) : nullptr;
254 if (const ConstantArray *CA = dyn_cast<ConstantArray>(this))
255 return Elt < CA->getNumOperands() ? CA->getOperand(Elt) : nullptr;
257 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
258 return Elt < CV->getNumOperands() ? CV->getOperand(Elt) : nullptr;
260 if (const ConstantAggregateZero *CAZ = dyn_cast<ConstantAggregateZero>(this))
261 return Elt < CAZ->getNumElements() ? CAZ->getElementValue(Elt) : nullptr;
263 if (const UndefValue *UV = dyn_cast<UndefValue>(this))
264 return Elt < UV->getNumElements() ? UV->getElementValue(Elt) : nullptr;
266 if (const ConstantDataSequential *CDS =dyn_cast<ConstantDataSequential>(this))
267 return Elt < CDS->getNumElements() ? CDS->getElementAsConstant(Elt)
272 Constant *Constant::getAggregateElement(Constant *Elt) const {
273 assert(isa<IntegerType>(Elt->getType()) && "Index must be an integer");
274 if (ConstantInt *CI = dyn_cast<ConstantInt>(Elt))
275 return getAggregateElement(CI->getZExtValue());
280 void Constant::destroyConstantImpl() {
281 // When a Constant is destroyed, there may be lingering
282 // references to the constant by other constants in the constant pool. These
283 // constants are implicitly dependent on the module that is being deleted,
284 // but they don't know that. Because we only find out when the CPV is
285 // deleted, we must now notify all of our users (that should only be
286 // Constants) that they are, in fact, invalid now and should be deleted.
288 while (!use_empty()) {
289 Value *V = user_back();
290 #ifndef NDEBUG // Only in -g mode...
291 if (!isa<Constant>(V)) {
292 dbgs() << "While deleting: " << *this
293 << "\n\nUse still stuck around after Def is destroyed: "
297 assert(isa<Constant>(V) && "References remain to Constant being destroyed");
298 cast<Constant>(V)->destroyConstant();
300 // The constant should remove itself from our use list...
301 assert((use_empty() || user_back() != V) && "Constant not removed!");
304 // Value has no outstanding references it is safe to delete it now...
308 static bool canTrapImpl(const Constant *C,
309 SmallPtrSetImpl<const ConstantExpr *> &NonTrappingOps) {
310 assert(C->getType()->isFirstClassType() && "Cannot evaluate aggregate vals!");
311 // The only thing that could possibly trap are constant exprs.
312 const ConstantExpr *CE = dyn_cast<ConstantExpr>(C);
316 // ConstantExpr traps if any operands can trap.
317 for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i) {
318 if (ConstantExpr *Op = dyn_cast<ConstantExpr>(CE->getOperand(i))) {
319 if (NonTrappingOps.insert(Op).second && canTrapImpl(Op, NonTrappingOps))
324 // Otherwise, only specific operations can trap.
325 switch (CE->getOpcode()) {
328 case Instruction::UDiv:
329 case Instruction::SDiv:
330 case Instruction::FDiv:
331 case Instruction::URem:
332 case Instruction::SRem:
333 case Instruction::FRem:
334 // Div and rem can trap if the RHS is not known to be non-zero.
335 if (!isa<ConstantInt>(CE->getOperand(1)) ||CE->getOperand(1)->isNullValue())
341 /// canTrap - Return true if evaluation of this constant could trap. This is
342 /// true for things like constant expressions that could divide by zero.
343 bool Constant::canTrap() const {
344 SmallPtrSet<const ConstantExpr *, 4> NonTrappingOps;
345 return canTrapImpl(this, NonTrappingOps);
348 /// Check if C contains a GlobalValue for which Predicate is true.
350 ConstHasGlobalValuePredicate(const Constant *C,
351 bool (*Predicate)(const GlobalValue *)) {
352 SmallPtrSet<const Constant *, 8> Visited;
353 SmallVector<const Constant *, 8> WorkList;
354 WorkList.push_back(C);
357 while (!WorkList.empty()) {
358 const Constant *WorkItem = WorkList.pop_back_val();
359 if (const auto *GV = dyn_cast<GlobalValue>(WorkItem))
362 for (const Value *Op : WorkItem->operands()) {
363 const Constant *ConstOp = dyn_cast<Constant>(Op);
366 if (Visited.insert(ConstOp).second)
367 WorkList.push_back(ConstOp);
373 /// Return true if the value can vary between threads.
374 bool Constant::isThreadDependent() const {
375 auto DLLImportPredicate = [](const GlobalValue *GV) {
376 return GV->isThreadLocal();
378 return ConstHasGlobalValuePredicate(this, DLLImportPredicate);
381 bool Constant::isDLLImportDependent() const {
382 auto DLLImportPredicate = [](const GlobalValue *GV) {
383 return GV->hasDLLImportStorageClass();
385 return ConstHasGlobalValuePredicate(this, DLLImportPredicate);
388 /// Return true if the constant has users other than constant exprs and other
390 bool Constant::isConstantUsed() const {
391 for (const User *U : users()) {
392 const Constant *UC = dyn_cast<Constant>(U);
393 if (!UC || isa<GlobalValue>(UC))
396 if (UC->isConstantUsed())
404 /// getRelocationInfo - This method classifies the entry according to
405 /// whether or not it may generate a relocation entry. This must be
406 /// conservative, so if it might codegen to a relocatable entry, it should say
407 /// so. The return values are:
409 /// NoRelocation: This constant pool entry is guaranteed to never have a
410 /// relocation applied to it (because it holds a simple constant like
412 /// LocalRelocation: This entry has relocations, but the entries are
413 /// guaranteed to be resolvable by the static linker, so the dynamic
414 /// linker will never see them.
415 /// GlobalRelocations: This entry may have arbitrary relocations.
417 /// FIXME: This really should not be in IR.
418 Constant::PossibleRelocationsTy Constant::getRelocationInfo() const {
419 if (const GlobalValue *GV = dyn_cast<GlobalValue>(this)) {
420 if (GV->hasLocalLinkage() || GV->hasHiddenVisibility())
421 return LocalRelocation; // Local to this file/library.
422 return GlobalRelocations; // Global reference.
425 if (const BlockAddress *BA = dyn_cast<BlockAddress>(this))
426 return BA->getFunction()->getRelocationInfo();
428 // While raw uses of blockaddress need to be relocated, differences between
429 // two of them don't when they are for labels in the same function. This is a
430 // common idiom when creating a table for the indirect goto extension, so we
431 // handle it efficiently here.
432 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(this))
433 if (CE->getOpcode() == Instruction::Sub) {
434 ConstantExpr *LHS = dyn_cast<ConstantExpr>(CE->getOperand(0));
435 ConstantExpr *RHS = dyn_cast<ConstantExpr>(CE->getOperand(1));
437 LHS->getOpcode() == Instruction::PtrToInt &&
438 RHS->getOpcode() == Instruction::PtrToInt &&
439 isa<BlockAddress>(LHS->getOperand(0)) &&
440 isa<BlockAddress>(RHS->getOperand(0)) &&
441 cast<BlockAddress>(LHS->getOperand(0))->getFunction() ==
442 cast<BlockAddress>(RHS->getOperand(0))->getFunction())
446 PossibleRelocationsTy Result = NoRelocation;
447 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
448 Result = std::max(Result,
449 cast<Constant>(getOperand(i))->getRelocationInfo());
454 /// removeDeadUsersOfConstant - If the specified constantexpr is dead, remove
455 /// it. This involves recursively eliminating any dead users of the
457 static bool removeDeadUsersOfConstant(const Constant *C) {
458 if (isa<GlobalValue>(C)) return false; // Cannot remove this
460 while (!C->use_empty()) {
461 const Constant *User = dyn_cast<Constant>(C->user_back());
462 if (!User) return false; // Non-constant usage;
463 if (!removeDeadUsersOfConstant(User))
464 return false; // Constant wasn't dead
467 const_cast<Constant*>(C)->destroyConstant();
472 /// removeDeadConstantUsers - If there are any dead constant users dangling
473 /// off of this constant, remove them. This method is useful for clients
474 /// that want to check to see if a global is unused, but don't want to deal
475 /// with potentially dead constants hanging off of the globals.
476 void Constant::removeDeadConstantUsers() const {
477 Value::const_user_iterator I = user_begin(), E = user_end();
478 Value::const_user_iterator LastNonDeadUser = E;
480 const Constant *User = dyn_cast<Constant>(*I);
487 if (!removeDeadUsersOfConstant(User)) {
488 // If the constant wasn't dead, remember that this was the last live use
489 // and move on to the next constant.
495 // If the constant was dead, then the iterator is invalidated.
496 if (LastNonDeadUser == E) {
508 //===----------------------------------------------------------------------===//
510 //===----------------------------------------------------------------------===//
512 void ConstantInt::anchor() { }
514 ConstantInt::ConstantInt(IntegerType *Ty, const APInt& V)
515 : Constant(Ty, ConstantIntVal, nullptr, 0), Val(V) {
516 assert(V.getBitWidth() == Ty->getBitWidth() && "Invalid constant for type");
519 ConstantInt *ConstantInt::getTrue(LLVMContext &Context) {
520 LLVMContextImpl *pImpl = Context.pImpl;
521 if (!pImpl->TheTrueVal)
522 pImpl->TheTrueVal = ConstantInt::get(Type::getInt1Ty(Context), 1);
523 return pImpl->TheTrueVal;
526 ConstantInt *ConstantInt::getFalse(LLVMContext &Context) {
527 LLVMContextImpl *pImpl = Context.pImpl;
528 if (!pImpl->TheFalseVal)
529 pImpl->TheFalseVal = ConstantInt::get(Type::getInt1Ty(Context), 0);
530 return pImpl->TheFalseVal;
533 Constant *ConstantInt::getTrue(Type *Ty) {
534 VectorType *VTy = dyn_cast<VectorType>(Ty);
536 assert(Ty->isIntegerTy(1) && "True must be i1 or vector of i1.");
537 return ConstantInt::getTrue(Ty->getContext());
539 assert(VTy->getElementType()->isIntegerTy(1) &&
540 "True must be vector of i1 or i1.");
541 return ConstantVector::getSplat(VTy->getNumElements(),
542 ConstantInt::getTrue(Ty->getContext()));
545 Constant *ConstantInt::getFalse(Type *Ty) {
546 VectorType *VTy = dyn_cast<VectorType>(Ty);
548 assert(Ty->isIntegerTy(1) && "False must be i1 or vector of i1.");
549 return ConstantInt::getFalse(Ty->getContext());
551 assert(VTy->getElementType()->isIntegerTy(1) &&
552 "False must be vector of i1 or i1.");
553 return ConstantVector::getSplat(VTy->getNumElements(),
554 ConstantInt::getFalse(Ty->getContext()));
557 // Get a ConstantInt from an APInt.
558 ConstantInt *ConstantInt::get(LLVMContext &Context, const APInt &V) {
559 // get an existing value or the insertion position
560 LLVMContextImpl *pImpl = Context.pImpl;
561 ConstantInt *&Slot = pImpl->IntConstants[V];
563 // Get the corresponding integer type for the bit width of the value.
564 IntegerType *ITy = IntegerType::get(Context, V.getBitWidth());
565 Slot = new ConstantInt(ITy, V);
567 assert(Slot->getType() == IntegerType::get(Context, V.getBitWidth()));
571 Constant *ConstantInt::get(Type *Ty, uint64_t V, bool isSigned) {
572 Constant *C = get(cast<IntegerType>(Ty->getScalarType()), V, isSigned);
574 // For vectors, broadcast the value.
575 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
576 return ConstantVector::getSplat(VTy->getNumElements(), C);
581 ConstantInt *ConstantInt::get(IntegerType *Ty, uint64_t V,
583 return get(Ty->getContext(), APInt(Ty->getBitWidth(), V, isSigned));
586 ConstantInt *ConstantInt::getSigned(IntegerType *Ty, int64_t V) {
587 return get(Ty, V, true);
590 Constant *ConstantInt::getSigned(Type *Ty, int64_t V) {
591 return get(Ty, V, true);
594 Constant *ConstantInt::get(Type *Ty, const APInt& V) {
595 ConstantInt *C = get(Ty->getContext(), V);
596 assert(C->getType() == Ty->getScalarType() &&
597 "ConstantInt type doesn't match the type implied by its value!");
599 // For vectors, broadcast the value.
600 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
601 return ConstantVector::getSplat(VTy->getNumElements(), C);
606 ConstantInt *ConstantInt::get(IntegerType* Ty, StringRef Str,
608 return get(Ty->getContext(), APInt(Ty->getBitWidth(), Str, radix));
611 //===----------------------------------------------------------------------===//
613 //===----------------------------------------------------------------------===//
615 static const fltSemantics *TypeToFloatSemantics(Type *Ty) {
617 return &APFloat::IEEEhalf;
619 return &APFloat::IEEEsingle;
620 if (Ty->isDoubleTy())
621 return &APFloat::IEEEdouble;
622 if (Ty->isX86_FP80Ty())
623 return &APFloat::x87DoubleExtended;
624 else if (Ty->isFP128Ty())
625 return &APFloat::IEEEquad;
627 assert(Ty->isPPC_FP128Ty() && "Unknown FP format");
628 return &APFloat::PPCDoubleDouble;
631 void ConstantFP::anchor() { }
633 /// get() - This returns a constant fp for the specified value in the
634 /// specified type. This should only be used for simple constant values like
635 /// 2.0/1.0 etc, that are known-valid both as double and as the target format.
636 Constant *ConstantFP::get(Type *Ty, double V) {
637 LLVMContext &Context = Ty->getContext();
641 FV.convert(*TypeToFloatSemantics(Ty->getScalarType()),
642 APFloat::rmNearestTiesToEven, &ignored);
643 Constant *C = get(Context, FV);
645 // For vectors, broadcast the value.
646 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
647 return ConstantVector::getSplat(VTy->getNumElements(), C);
653 Constant *ConstantFP::get(Type *Ty, StringRef Str) {
654 LLVMContext &Context = Ty->getContext();
656 APFloat FV(*TypeToFloatSemantics(Ty->getScalarType()), Str);
657 Constant *C = get(Context, FV);
659 // For vectors, broadcast the value.
660 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
661 return ConstantVector::getSplat(VTy->getNumElements(), C);
666 Constant *ConstantFP::getNegativeZero(Type *Ty) {
667 const fltSemantics &Semantics = *TypeToFloatSemantics(Ty->getScalarType());
668 APFloat NegZero = APFloat::getZero(Semantics, /*Negative=*/true);
669 Constant *C = get(Ty->getContext(), NegZero);
671 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
672 return ConstantVector::getSplat(VTy->getNumElements(), C);
678 Constant *ConstantFP::getZeroValueForNegation(Type *Ty) {
679 if (Ty->isFPOrFPVectorTy())
680 return getNegativeZero(Ty);
682 return Constant::getNullValue(Ty);
686 // ConstantFP accessors.
687 ConstantFP* ConstantFP::get(LLVMContext &Context, const APFloat& V) {
688 LLVMContextImpl* pImpl = Context.pImpl;
690 ConstantFP *&Slot = pImpl->FPConstants[V];
694 if (&V.getSemantics() == &APFloat::IEEEhalf)
695 Ty = Type::getHalfTy(Context);
696 else if (&V.getSemantics() == &APFloat::IEEEsingle)
697 Ty = Type::getFloatTy(Context);
698 else if (&V.getSemantics() == &APFloat::IEEEdouble)
699 Ty = Type::getDoubleTy(Context);
700 else if (&V.getSemantics() == &APFloat::x87DoubleExtended)
701 Ty = Type::getX86_FP80Ty(Context);
702 else if (&V.getSemantics() == &APFloat::IEEEquad)
703 Ty = Type::getFP128Ty(Context);
705 assert(&V.getSemantics() == &APFloat::PPCDoubleDouble &&
706 "Unknown FP format");
707 Ty = Type::getPPC_FP128Ty(Context);
709 Slot = new ConstantFP(Ty, V);
715 Constant *ConstantFP::getInfinity(Type *Ty, bool Negative) {
716 const fltSemantics &Semantics = *TypeToFloatSemantics(Ty->getScalarType());
717 Constant *C = get(Ty->getContext(), APFloat::getInf(Semantics, Negative));
719 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
720 return ConstantVector::getSplat(VTy->getNumElements(), C);
725 ConstantFP::ConstantFP(Type *Ty, const APFloat& V)
726 : Constant(Ty, ConstantFPVal, nullptr, 0), Val(V) {
727 assert(&V.getSemantics() == TypeToFloatSemantics(Ty) &&
731 bool ConstantFP::isExactlyValue(const APFloat &V) const {
732 return Val.bitwiseIsEqual(V);
735 //===----------------------------------------------------------------------===//
736 // ConstantAggregateZero Implementation
737 //===----------------------------------------------------------------------===//
739 /// getSequentialElement - If this CAZ has array or vector type, return a zero
740 /// with the right element type.
741 Constant *ConstantAggregateZero::getSequentialElement() const {
742 return Constant::getNullValue(getType()->getSequentialElementType());
745 /// getStructElement - If this CAZ has struct type, return a zero with the
746 /// right element type for the specified element.
747 Constant *ConstantAggregateZero::getStructElement(unsigned Elt) const {
748 return Constant::getNullValue(getType()->getStructElementType(Elt));
751 /// getElementValue - Return a zero of the right value for the specified GEP
752 /// index if we can, otherwise return null (e.g. if C is a ConstantExpr).
753 Constant *ConstantAggregateZero::getElementValue(Constant *C) const {
754 if (isa<SequentialType>(getType()))
755 return getSequentialElement();
756 return getStructElement(cast<ConstantInt>(C)->getZExtValue());
759 /// getElementValue - Return a zero of the right value for the specified GEP
761 Constant *ConstantAggregateZero::getElementValue(unsigned Idx) const {
762 if (isa<SequentialType>(getType()))
763 return getSequentialElement();
764 return getStructElement(Idx);
767 unsigned ConstantAggregateZero::getNumElements() const {
768 const Type *Ty = getType();
769 if (const auto *AT = dyn_cast<ArrayType>(Ty))
770 return AT->getNumElements();
771 if (const auto *VT = dyn_cast<VectorType>(Ty))
772 return VT->getNumElements();
773 return Ty->getStructNumElements();
776 //===----------------------------------------------------------------------===//
777 // UndefValue Implementation
778 //===----------------------------------------------------------------------===//
780 /// getSequentialElement - If this undef has array or vector type, return an
781 /// undef with the right element type.
782 UndefValue *UndefValue::getSequentialElement() const {
783 return UndefValue::get(getType()->getSequentialElementType());
786 /// getStructElement - If this undef has struct type, return a zero with the
787 /// right element type for the specified element.
788 UndefValue *UndefValue::getStructElement(unsigned Elt) const {
789 return UndefValue::get(getType()->getStructElementType(Elt));
792 /// getElementValue - Return an undef of the right value for the specified GEP
793 /// index if we can, otherwise return null (e.g. if C is a ConstantExpr).
794 UndefValue *UndefValue::getElementValue(Constant *C) const {
795 if (isa<SequentialType>(getType()))
796 return getSequentialElement();
797 return getStructElement(cast<ConstantInt>(C)->getZExtValue());
800 /// getElementValue - Return an undef of the right value for the specified GEP
802 UndefValue *UndefValue::getElementValue(unsigned Idx) const {
803 if (isa<SequentialType>(getType()))
804 return getSequentialElement();
805 return getStructElement(Idx);
808 unsigned UndefValue::getNumElements() const {
809 const Type *Ty = getType();
810 if (const auto *AT = dyn_cast<ArrayType>(Ty))
811 return AT->getNumElements();
812 if (const auto *VT = dyn_cast<VectorType>(Ty))
813 return VT->getNumElements();
814 return Ty->getStructNumElements();
817 //===----------------------------------------------------------------------===//
818 // ConstantXXX Classes
819 //===----------------------------------------------------------------------===//
821 template <typename ItTy, typename EltTy>
822 static bool rangeOnlyContains(ItTy Start, ItTy End, EltTy Elt) {
823 for (; Start != End; ++Start)
829 ConstantArray::ConstantArray(ArrayType *T, ArrayRef<Constant *> V)
830 : Constant(T, ConstantArrayVal,
831 OperandTraits<ConstantArray>::op_end(this) - V.size(),
833 assert(V.size() == T->getNumElements() &&
834 "Invalid initializer vector for constant array");
835 for (unsigned i = 0, e = V.size(); i != e; ++i)
836 assert(V[i]->getType() == T->getElementType() &&
837 "Initializer for array element doesn't match array element type!");
838 std::copy(V.begin(), V.end(), op_begin());
841 Constant *ConstantArray::get(ArrayType *Ty, ArrayRef<Constant*> V) {
842 if (Constant *C = getImpl(Ty, V))
844 return Ty->getContext().pImpl->ArrayConstants.getOrCreate(Ty, V);
846 Constant *ConstantArray::getImpl(ArrayType *Ty, ArrayRef<Constant*> V) {
847 // Empty arrays are canonicalized to ConstantAggregateZero.
849 return ConstantAggregateZero::get(Ty);
851 for (unsigned i = 0, e = V.size(); i != e; ++i) {
852 assert(V[i]->getType() == Ty->getElementType() &&
853 "Wrong type in array element initializer");
856 // If this is an all-zero array, return a ConstantAggregateZero object. If
857 // all undef, return an UndefValue, if "all simple", then return a
858 // ConstantDataArray.
860 if (isa<UndefValue>(C) && rangeOnlyContains(V.begin(), V.end(), C))
861 return UndefValue::get(Ty);
863 if (C->isNullValue() && rangeOnlyContains(V.begin(), V.end(), C))
864 return ConstantAggregateZero::get(Ty);
866 // Check to see if all of the elements are ConstantFP or ConstantInt and if
867 // the element type is compatible with ConstantDataVector. If so, use it.
868 if (ConstantDataSequential::isElementTypeCompatible(C->getType())) {
869 // We speculatively build the elements here even if it turns out that there
870 // is a constantexpr or something else weird in the array, since it is so
871 // uncommon for that to happen.
872 if (ConstantInt *CI = dyn_cast<ConstantInt>(C)) {
873 if (CI->getType()->isIntegerTy(8)) {
874 SmallVector<uint8_t, 16> Elts;
875 for (unsigned i = 0, e = V.size(); i != e; ++i)
876 if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
877 Elts.push_back(CI->getZExtValue());
880 if (Elts.size() == V.size())
881 return ConstantDataArray::get(C->getContext(), Elts);
882 } else if (CI->getType()->isIntegerTy(16)) {
883 SmallVector<uint16_t, 16> Elts;
884 for (unsigned i = 0, e = V.size(); i != e; ++i)
885 if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
886 Elts.push_back(CI->getZExtValue());
889 if (Elts.size() == V.size())
890 return ConstantDataArray::get(C->getContext(), Elts);
891 } else if (CI->getType()->isIntegerTy(32)) {
892 SmallVector<uint32_t, 16> Elts;
893 for (unsigned i = 0, e = V.size(); i != e; ++i)
894 if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
895 Elts.push_back(CI->getZExtValue());
898 if (Elts.size() == V.size())
899 return ConstantDataArray::get(C->getContext(), Elts);
900 } else if (CI->getType()->isIntegerTy(64)) {
901 SmallVector<uint64_t, 16> Elts;
902 for (unsigned i = 0, e = V.size(); i != e; ++i)
903 if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
904 Elts.push_back(CI->getZExtValue());
907 if (Elts.size() == V.size())
908 return ConstantDataArray::get(C->getContext(), Elts);
912 if (ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
913 if (CFP->getType()->isFloatTy()) {
914 SmallVector<uint32_t, 16> Elts;
915 for (unsigned i = 0, e = V.size(); i != e; ++i)
916 if (ConstantFP *CFP = dyn_cast<ConstantFP>(V[i]))
918 CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
921 if (Elts.size() == V.size())
922 return ConstantDataArray::getFP(C->getContext(), Elts);
923 } else if (CFP->getType()->isDoubleTy()) {
924 SmallVector<uint64_t, 16> Elts;
925 for (unsigned i = 0, e = V.size(); i != e; ++i)
926 if (ConstantFP *CFP = dyn_cast<ConstantFP>(V[i]))
928 CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
931 if (Elts.size() == V.size())
932 return ConstantDataArray::getFP(C->getContext(), Elts);
937 // Otherwise, we really do want to create a ConstantArray.
941 /// getTypeForElements - Return an anonymous struct type to use for a constant
942 /// with the specified set of elements. The list must not be empty.
943 StructType *ConstantStruct::getTypeForElements(LLVMContext &Context,
944 ArrayRef<Constant*> V,
946 unsigned VecSize = V.size();
947 SmallVector<Type*, 16> EltTypes(VecSize);
948 for (unsigned i = 0; i != VecSize; ++i)
949 EltTypes[i] = V[i]->getType();
951 return StructType::get(Context, EltTypes, Packed);
955 StructType *ConstantStruct::getTypeForElements(ArrayRef<Constant*> V,
958 "ConstantStruct::getTypeForElements cannot be called on empty list");
959 return getTypeForElements(V[0]->getContext(), V, Packed);
963 ConstantStruct::ConstantStruct(StructType *T, ArrayRef<Constant *> V)
964 : Constant(T, ConstantStructVal,
965 OperandTraits<ConstantStruct>::op_end(this) - V.size(),
967 assert(V.size() == T->getNumElements() &&
968 "Invalid initializer vector for constant structure");
969 for (unsigned i = 0, e = V.size(); i != e; ++i)
970 assert((T->isOpaque() || V[i]->getType() == T->getElementType(i)) &&
971 "Initializer for struct element doesn't match struct element type!");
972 std::copy(V.begin(), V.end(), op_begin());
975 // ConstantStruct accessors.
976 Constant *ConstantStruct::get(StructType *ST, ArrayRef<Constant*> V) {
977 assert((ST->isOpaque() || ST->getNumElements() == V.size()) &&
978 "Incorrect # elements specified to ConstantStruct::get");
980 // Create a ConstantAggregateZero value if all elements are zeros.
982 bool isUndef = false;
985 isUndef = isa<UndefValue>(V[0]);
986 isZero = V[0]->isNullValue();
987 if (isUndef || isZero) {
988 for (unsigned i = 0, e = V.size(); i != e; ++i) {
989 if (!V[i]->isNullValue())
991 if (!isa<UndefValue>(V[i]))
997 return ConstantAggregateZero::get(ST);
999 return UndefValue::get(ST);
1001 return ST->getContext().pImpl->StructConstants.getOrCreate(ST, V);
1004 Constant *ConstantStruct::get(StructType *T, ...) {
1006 SmallVector<Constant*, 8> Values;
1008 while (Constant *Val = va_arg(ap, llvm::Constant*))
1009 Values.push_back(Val);
1011 return get(T, Values);
1014 ConstantVector::ConstantVector(VectorType *T, ArrayRef<Constant *> V)
1015 : Constant(T, ConstantVectorVal,
1016 OperandTraits<ConstantVector>::op_end(this) - V.size(),
1018 for (size_t i = 0, e = V.size(); i != e; i++)
1019 assert(V[i]->getType() == T->getElementType() &&
1020 "Initializer for vector element doesn't match vector element type!");
1021 std::copy(V.begin(), V.end(), op_begin());
1024 // ConstantVector accessors.
1025 Constant *ConstantVector::get(ArrayRef<Constant*> V) {
1026 if (Constant *C = getImpl(V))
1028 VectorType *Ty = VectorType::get(V.front()->getType(), V.size());
1029 return Ty->getContext().pImpl->VectorConstants.getOrCreate(Ty, V);
1031 Constant *ConstantVector::getImpl(ArrayRef<Constant*> V) {
1032 assert(!V.empty() && "Vectors can't be empty");
1033 VectorType *T = VectorType::get(V.front()->getType(), V.size());
1035 // If this is an all-undef or all-zero vector, return a
1036 // ConstantAggregateZero or UndefValue.
1038 bool isZero = C->isNullValue();
1039 bool isUndef = isa<UndefValue>(C);
1041 if (isZero || isUndef) {
1042 for (unsigned i = 1, e = V.size(); i != e; ++i)
1044 isZero = isUndef = false;
1050 return ConstantAggregateZero::get(T);
1052 return UndefValue::get(T);
1054 // Check to see if all of the elements are ConstantFP or ConstantInt and if
1055 // the element type is compatible with ConstantDataVector. If so, use it.
1056 if (ConstantDataSequential::isElementTypeCompatible(C->getType())) {
1057 // We speculatively build the elements here even if it turns out that there
1058 // is a constantexpr or something else weird in the array, since it is so
1059 // uncommon for that to happen.
1060 if (ConstantInt *CI = dyn_cast<ConstantInt>(C)) {
1061 if (CI->getType()->isIntegerTy(8)) {
1062 SmallVector<uint8_t, 16> Elts;
1063 for (unsigned i = 0, e = V.size(); i != e; ++i)
1064 if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
1065 Elts.push_back(CI->getZExtValue());
1068 if (Elts.size() == V.size())
1069 return ConstantDataVector::get(C->getContext(), Elts);
1070 } else if (CI->getType()->isIntegerTy(16)) {
1071 SmallVector<uint16_t, 16> Elts;
1072 for (unsigned i = 0, e = V.size(); i != e; ++i)
1073 if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
1074 Elts.push_back(CI->getZExtValue());
1077 if (Elts.size() == V.size())
1078 return ConstantDataVector::get(C->getContext(), Elts);
1079 } else if (CI->getType()->isIntegerTy(32)) {
1080 SmallVector<uint32_t, 16> Elts;
1081 for (unsigned i = 0, e = V.size(); i != e; ++i)
1082 if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
1083 Elts.push_back(CI->getZExtValue());
1086 if (Elts.size() == V.size())
1087 return ConstantDataVector::get(C->getContext(), Elts);
1088 } else if (CI->getType()->isIntegerTy(64)) {
1089 SmallVector<uint64_t, 16> Elts;
1090 for (unsigned i = 0, e = V.size(); i != e; ++i)
1091 if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
1092 Elts.push_back(CI->getZExtValue());
1095 if (Elts.size() == V.size())
1096 return ConstantDataVector::get(C->getContext(), Elts);
1100 if (ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
1101 if (CFP->getType()->isFloatTy()) {
1102 SmallVector<uint32_t, 16> Elts;
1103 for (unsigned i = 0, e = V.size(); i != e; ++i)
1104 if (ConstantFP *CFP = dyn_cast<ConstantFP>(V[i]))
1106 CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
1109 if (Elts.size() == V.size())
1110 return ConstantDataVector::getFP(C->getContext(), Elts);
1111 } else if (CFP->getType()->isDoubleTy()) {
1112 SmallVector<uint64_t, 16> Elts;
1113 for (unsigned i = 0, e = V.size(); i != e; ++i)
1114 if (ConstantFP *CFP = dyn_cast<ConstantFP>(V[i]))
1116 CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
1119 if (Elts.size() == V.size())
1120 return ConstantDataVector::getFP(C->getContext(), Elts);
1125 // Otherwise, the element type isn't compatible with ConstantDataVector, or
1126 // the operand list constants a ConstantExpr or something else strange.
1130 Constant *ConstantVector::getSplat(unsigned NumElts, Constant *V) {
1131 // If this splat is compatible with ConstantDataVector, use it instead of
1133 if ((isa<ConstantFP>(V) || isa<ConstantInt>(V)) &&
1134 ConstantDataSequential::isElementTypeCompatible(V->getType()))
1135 return ConstantDataVector::getSplat(NumElts, V);
1137 SmallVector<Constant*, 32> Elts(NumElts, V);
1142 // Utility function for determining if a ConstantExpr is a CastOp or not. This
1143 // can't be inline because we don't want to #include Instruction.h into
1145 bool ConstantExpr::isCast() const {
1146 return Instruction::isCast(getOpcode());
1149 bool ConstantExpr::isCompare() const {
1150 return getOpcode() == Instruction::ICmp || getOpcode() == Instruction::FCmp;
1153 bool ConstantExpr::isGEPWithNoNotionalOverIndexing() const {
1154 if (getOpcode() != Instruction::GetElementPtr) return false;
1156 gep_type_iterator GEPI = gep_type_begin(this), E = gep_type_end(this);
1157 User::const_op_iterator OI = std::next(this->op_begin());
1159 // Skip the first index, as it has no static limit.
1163 // The remaining indices must be compile-time known integers within the
1164 // bounds of the corresponding notional static array types.
1165 for (; GEPI != E; ++GEPI, ++OI) {
1166 ConstantInt *CI = dyn_cast<ConstantInt>(*OI);
1167 if (!CI) return false;
1168 if (ArrayType *ATy = dyn_cast<ArrayType>(*GEPI))
1169 if (CI->getValue().getActiveBits() > 64 ||
1170 CI->getZExtValue() >= ATy->getNumElements())
1174 // All the indices checked out.
1178 bool ConstantExpr::hasIndices() const {
1179 return getOpcode() == Instruction::ExtractValue ||
1180 getOpcode() == Instruction::InsertValue;
1183 ArrayRef<unsigned> ConstantExpr::getIndices() const {
1184 if (const ExtractValueConstantExpr *EVCE =
1185 dyn_cast<ExtractValueConstantExpr>(this))
1186 return EVCE->Indices;
1188 return cast<InsertValueConstantExpr>(this)->Indices;
1191 unsigned ConstantExpr::getPredicate() const {
1192 assert(isCompare());
1193 return ((const CompareConstantExpr*)this)->predicate;
1196 /// getWithOperandReplaced - Return a constant expression identical to this
1197 /// one, but with the specified operand set to the specified value.
1199 ConstantExpr::getWithOperandReplaced(unsigned OpNo, Constant *Op) const {
1200 assert(Op->getType() == getOperand(OpNo)->getType() &&
1201 "Replacing operand with value of different type!");
1202 if (getOperand(OpNo) == Op)
1203 return const_cast<ConstantExpr*>(this);
1205 SmallVector<Constant*, 8> NewOps;
1206 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
1207 NewOps.push_back(i == OpNo ? Op : getOperand(i));
1209 return getWithOperands(NewOps);
1212 /// getWithOperands - This returns the current constant expression with the
1213 /// operands replaced with the specified values. The specified array must
1214 /// have the same number of operands as our current one.
1215 Constant *ConstantExpr::getWithOperands(ArrayRef<Constant *> Ops, Type *Ty,
1216 bool OnlyIfReduced) const {
1217 assert(Ops.size() == getNumOperands() && "Operand count mismatch!");
1218 bool AnyChange = Ty != getType();
1219 for (unsigned i = 0; i != Ops.size(); ++i)
1220 AnyChange |= Ops[i] != getOperand(i);
1222 if (!AnyChange) // No operands changed, return self.
1223 return const_cast<ConstantExpr*>(this);
1225 Type *OnlyIfReducedTy = OnlyIfReduced ? Ty : nullptr;
1226 switch (getOpcode()) {
1227 case Instruction::Trunc:
1228 case Instruction::ZExt:
1229 case Instruction::SExt:
1230 case Instruction::FPTrunc:
1231 case Instruction::FPExt:
1232 case Instruction::UIToFP:
1233 case Instruction::SIToFP:
1234 case Instruction::FPToUI:
1235 case Instruction::FPToSI:
1236 case Instruction::PtrToInt:
1237 case Instruction::IntToPtr:
1238 case Instruction::BitCast:
1239 case Instruction::AddrSpaceCast:
1240 return ConstantExpr::getCast(getOpcode(), Ops[0], Ty, OnlyIfReduced);
1241 case Instruction::Select:
1242 return ConstantExpr::getSelect(Ops[0], Ops[1], Ops[2], OnlyIfReducedTy);
1243 case Instruction::InsertElement:
1244 return ConstantExpr::getInsertElement(Ops[0], Ops[1], Ops[2],
1246 case Instruction::ExtractElement:
1247 return ConstantExpr::getExtractElement(Ops[0], Ops[1], OnlyIfReducedTy);
1248 case Instruction::InsertValue:
1249 return ConstantExpr::getInsertValue(Ops[0], Ops[1], getIndices(),
1251 case Instruction::ExtractValue:
1252 return ConstantExpr::getExtractValue(Ops[0], getIndices(), OnlyIfReducedTy);
1253 case Instruction::ShuffleVector:
1254 return ConstantExpr::getShuffleVector(Ops[0], Ops[1], Ops[2],
1256 case Instruction::GetElementPtr:
1257 return ConstantExpr::getGetElementPtr(Ops[0], Ops.slice(1),
1258 cast<GEPOperator>(this)->isInBounds(),
1260 case Instruction::ICmp:
1261 case Instruction::FCmp:
1262 return ConstantExpr::getCompare(getPredicate(), Ops[0], Ops[1],
1265 assert(getNumOperands() == 2 && "Must be binary operator?");
1266 return ConstantExpr::get(getOpcode(), Ops[0], Ops[1], SubclassOptionalData,
1272 //===----------------------------------------------------------------------===//
1273 // isValueValidForType implementations
1275 bool ConstantInt::isValueValidForType(Type *Ty, uint64_t Val) {
1276 unsigned NumBits = Ty->getIntegerBitWidth(); // assert okay
1277 if (Ty->isIntegerTy(1))
1278 return Val == 0 || Val == 1;
1280 return true; // always true, has to fit in largest type
1281 uint64_t Max = (1ll << NumBits) - 1;
1285 bool ConstantInt::isValueValidForType(Type *Ty, int64_t Val) {
1286 unsigned NumBits = Ty->getIntegerBitWidth();
1287 if (Ty->isIntegerTy(1))
1288 return Val == 0 || Val == 1 || Val == -1;
1290 return true; // always true, has to fit in largest type
1291 int64_t Min = -(1ll << (NumBits-1));
1292 int64_t Max = (1ll << (NumBits-1)) - 1;
1293 return (Val >= Min && Val <= Max);
1296 bool ConstantFP::isValueValidForType(Type *Ty, const APFloat& Val) {
1297 // convert modifies in place, so make a copy.
1298 APFloat Val2 = APFloat(Val);
1300 switch (Ty->getTypeID()) {
1302 return false; // These can't be represented as floating point!
1304 // FIXME rounding mode needs to be more flexible
1305 case Type::HalfTyID: {
1306 if (&Val2.getSemantics() == &APFloat::IEEEhalf)
1308 Val2.convert(APFloat::IEEEhalf, APFloat::rmNearestTiesToEven, &losesInfo);
1311 case Type::FloatTyID: {
1312 if (&Val2.getSemantics() == &APFloat::IEEEsingle)
1314 Val2.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, &losesInfo);
1317 case Type::DoubleTyID: {
1318 if (&Val2.getSemantics() == &APFloat::IEEEhalf ||
1319 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1320 &Val2.getSemantics() == &APFloat::IEEEdouble)
1322 Val2.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &losesInfo);
1325 case Type::X86_FP80TyID:
1326 return &Val2.getSemantics() == &APFloat::IEEEhalf ||
1327 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1328 &Val2.getSemantics() == &APFloat::IEEEdouble ||
1329 &Val2.getSemantics() == &APFloat::x87DoubleExtended;
1330 case Type::FP128TyID:
1331 return &Val2.getSemantics() == &APFloat::IEEEhalf ||
1332 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1333 &Val2.getSemantics() == &APFloat::IEEEdouble ||
1334 &Val2.getSemantics() == &APFloat::IEEEquad;
1335 case Type::PPC_FP128TyID:
1336 return &Val2.getSemantics() == &APFloat::IEEEhalf ||
1337 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1338 &Val2.getSemantics() == &APFloat::IEEEdouble ||
1339 &Val2.getSemantics() == &APFloat::PPCDoubleDouble;
1344 //===----------------------------------------------------------------------===//
1345 // Factory Function Implementation
1347 ConstantAggregateZero *ConstantAggregateZero::get(Type *Ty) {
1348 assert((Ty->isStructTy() || Ty->isArrayTy() || Ty->isVectorTy()) &&
1349 "Cannot create an aggregate zero of non-aggregate type!");
1351 ConstantAggregateZero *&Entry = Ty->getContext().pImpl->CAZConstants[Ty];
1353 Entry = new ConstantAggregateZero(Ty);
1358 /// destroyConstant - Remove the constant from the constant table.
1360 void ConstantAggregateZero::destroyConstant() {
1361 getContext().pImpl->CAZConstants.erase(getType());
1362 destroyConstantImpl();
1365 /// destroyConstant - Remove the constant from the constant table...
1367 void ConstantArray::destroyConstant() {
1368 getType()->getContext().pImpl->ArrayConstants.remove(this);
1369 destroyConstantImpl();
1373 //---- ConstantStruct::get() implementation...
1376 // destroyConstant - Remove the constant from the constant table...
1378 void ConstantStruct::destroyConstant() {
1379 getType()->getContext().pImpl->StructConstants.remove(this);
1380 destroyConstantImpl();
1383 // destroyConstant - Remove the constant from the constant table...
1385 void ConstantVector::destroyConstant() {
1386 getType()->getContext().pImpl->VectorConstants.remove(this);
1387 destroyConstantImpl();
1390 /// getSplatValue - If this is a splat vector constant, meaning that all of
1391 /// the elements have the same value, return that value. Otherwise return 0.
1392 Constant *Constant::getSplatValue() const {
1393 assert(this->getType()->isVectorTy() && "Only valid for vectors!");
1394 if (isa<ConstantAggregateZero>(this))
1395 return getNullValue(this->getType()->getVectorElementType());
1396 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
1397 return CV->getSplatValue();
1398 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
1399 return CV->getSplatValue();
1403 /// getSplatValue - If this is a splat constant, where all of the
1404 /// elements have the same value, return that value. Otherwise return null.
1405 Constant *ConstantVector::getSplatValue() const {
1406 // Check out first element.
1407 Constant *Elt = getOperand(0);
1408 // Then make sure all remaining elements point to the same value.
1409 for (unsigned I = 1, E = getNumOperands(); I < E; ++I)
1410 if (getOperand(I) != Elt)
1415 /// If C is a constant integer then return its value, otherwise C must be a
1416 /// vector of constant integers, all equal, and the common value is returned.
1417 const APInt &Constant::getUniqueInteger() const {
1418 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
1419 return CI->getValue();
1420 assert(this->getSplatValue() && "Doesn't contain a unique integer!");
1421 const Constant *C = this->getAggregateElement(0U);
1422 assert(C && isa<ConstantInt>(C) && "Not a vector of numbers!");
1423 return cast<ConstantInt>(C)->getValue();
1427 //---- ConstantPointerNull::get() implementation.
1430 ConstantPointerNull *ConstantPointerNull::get(PointerType *Ty) {
1431 ConstantPointerNull *&Entry = Ty->getContext().pImpl->CPNConstants[Ty];
1433 Entry = new ConstantPointerNull(Ty);
1438 // destroyConstant - Remove the constant from the constant table...
1440 void ConstantPointerNull::destroyConstant() {
1441 getContext().pImpl->CPNConstants.erase(getType());
1442 // Free the constant and any dangling references to it.
1443 destroyConstantImpl();
1447 //---- UndefValue::get() implementation.
1450 UndefValue *UndefValue::get(Type *Ty) {
1451 UndefValue *&Entry = Ty->getContext().pImpl->UVConstants[Ty];
1453 Entry = new UndefValue(Ty);
1458 // destroyConstant - Remove the constant from the constant table.
1460 void UndefValue::destroyConstant() {
1461 // Free the constant and any dangling references to it.
1462 getContext().pImpl->UVConstants.erase(getType());
1463 destroyConstantImpl();
1466 //---- BlockAddress::get() implementation.
1469 BlockAddress *BlockAddress::get(BasicBlock *BB) {
1470 assert(BB->getParent() && "Block must have a parent");
1471 return get(BB->getParent(), BB);
1474 BlockAddress *BlockAddress::get(Function *F, BasicBlock *BB) {
1476 F->getContext().pImpl->BlockAddresses[std::make_pair(F, BB)];
1478 BA = new BlockAddress(F, BB);
1480 assert(BA->getFunction() == F && "Basic block moved between functions");
1484 BlockAddress::BlockAddress(Function *F, BasicBlock *BB)
1485 : Constant(Type::getInt8PtrTy(F->getContext()), Value::BlockAddressVal,
1489 BB->AdjustBlockAddressRefCount(1);
1492 BlockAddress *BlockAddress::lookup(const BasicBlock *BB) {
1493 if (!BB->hasAddressTaken())
1496 const Function *F = BB->getParent();
1497 assert(F && "Block must have a parent");
1499 F->getContext().pImpl->BlockAddresses.lookup(std::make_pair(F, BB));
1500 assert(BA && "Refcount and block address map disagree!");
1504 // destroyConstant - Remove the constant from the constant table.
1506 void BlockAddress::destroyConstant() {
1507 getFunction()->getType()->getContext().pImpl
1508 ->BlockAddresses.erase(std::make_pair(getFunction(), getBasicBlock()));
1509 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1510 destroyConstantImpl();
1513 void BlockAddress::replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) {
1514 // This could be replacing either the Basic Block or the Function. In either
1515 // case, we have to remove the map entry.
1516 Function *NewF = getFunction();
1517 BasicBlock *NewBB = getBasicBlock();
1520 NewF = cast<Function>(To->stripPointerCasts());
1522 NewBB = cast<BasicBlock>(To);
1524 // See if the 'new' entry already exists, if not, just update this in place
1525 // and return early.
1526 BlockAddress *&NewBA =
1527 getContext().pImpl->BlockAddresses[std::make_pair(NewF, NewBB)];
1529 replaceUsesOfWithOnConstantImpl(NewBA);
1533 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1535 // Remove the old entry, this can't cause the map to rehash (just a
1536 // tombstone will get added).
1537 getContext().pImpl->BlockAddresses.erase(std::make_pair(getFunction(),
1540 setOperand(0, NewF);
1541 setOperand(1, NewBB);
1542 getBasicBlock()->AdjustBlockAddressRefCount(1);
1545 //---- ConstantExpr::get() implementations.
1548 /// This is a utility function to handle folding of casts and lookup of the
1549 /// cast in the ExprConstants map. It is used by the various get* methods below.
1550 static Constant *getFoldedCast(Instruction::CastOps opc, Constant *C, Type *Ty,
1551 bool OnlyIfReduced = false) {
1552 assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
1553 // Fold a few common cases
1554 if (Constant *FC = ConstantFoldCastInstruction(opc, C, Ty))
1560 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
1562 // Look up the constant in the table first to ensure uniqueness.
1563 ConstantExprKeyType Key(opc, C);
1565 return pImpl->ExprConstants.getOrCreate(Ty, Key);
1568 Constant *ConstantExpr::getCast(unsigned oc, Constant *C, Type *Ty,
1569 bool OnlyIfReduced) {
1570 Instruction::CastOps opc = Instruction::CastOps(oc);
1571 assert(Instruction::isCast(opc) && "opcode out of range");
1572 assert(C && Ty && "Null arguments to getCast");
1573 assert(CastInst::castIsValid(opc, C, Ty) && "Invalid constantexpr cast!");
1577 llvm_unreachable("Invalid cast opcode");
1578 case Instruction::Trunc:
1579 return getTrunc(C, Ty, OnlyIfReduced);
1580 case Instruction::ZExt:
1581 return getZExt(C, Ty, OnlyIfReduced);
1582 case Instruction::SExt:
1583 return getSExt(C, Ty, OnlyIfReduced);
1584 case Instruction::FPTrunc:
1585 return getFPTrunc(C, Ty, OnlyIfReduced);
1586 case Instruction::FPExt:
1587 return getFPExtend(C, Ty, OnlyIfReduced);
1588 case Instruction::UIToFP:
1589 return getUIToFP(C, Ty, OnlyIfReduced);
1590 case Instruction::SIToFP:
1591 return getSIToFP(C, Ty, OnlyIfReduced);
1592 case Instruction::FPToUI:
1593 return getFPToUI(C, Ty, OnlyIfReduced);
1594 case Instruction::FPToSI:
1595 return getFPToSI(C, Ty, OnlyIfReduced);
1596 case Instruction::PtrToInt:
1597 return getPtrToInt(C, Ty, OnlyIfReduced);
1598 case Instruction::IntToPtr:
1599 return getIntToPtr(C, Ty, OnlyIfReduced);
1600 case Instruction::BitCast:
1601 return getBitCast(C, Ty, OnlyIfReduced);
1602 case Instruction::AddrSpaceCast:
1603 return getAddrSpaceCast(C, Ty, OnlyIfReduced);
1607 Constant *ConstantExpr::getZExtOrBitCast(Constant *C, Type *Ty) {
1608 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1609 return getBitCast(C, Ty);
1610 return getZExt(C, Ty);
1613 Constant *ConstantExpr::getSExtOrBitCast(Constant *C, Type *Ty) {
1614 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1615 return getBitCast(C, Ty);
1616 return getSExt(C, Ty);
1619 Constant *ConstantExpr::getTruncOrBitCast(Constant *C, Type *Ty) {
1620 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1621 return getBitCast(C, Ty);
1622 return getTrunc(C, Ty);
1625 Constant *ConstantExpr::getPointerCast(Constant *S, Type *Ty) {
1626 assert(S->getType()->isPtrOrPtrVectorTy() && "Invalid cast");
1627 assert((Ty->isIntOrIntVectorTy() || Ty->isPtrOrPtrVectorTy()) &&
1630 if (Ty->isIntOrIntVectorTy())
1631 return getPtrToInt(S, Ty);
1633 unsigned SrcAS = S->getType()->getPointerAddressSpace();
1634 if (Ty->isPtrOrPtrVectorTy() && SrcAS != Ty->getPointerAddressSpace())
1635 return getAddrSpaceCast(S, Ty);
1637 return getBitCast(S, Ty);
1640 Constant *ConstantExpr::getPointerBitCastOrAddrSpaceCast(Constant *S,
1642 assert(S->getType()->isPtrOrPtrVectorTy() && "Invalid cast");
1643 assert(Ty->isPtrOrPtrVectorTy() && "Invalid cast");
1645 if (S->getType()->getPointerAddressSpace() != Ty->getPointerAddressSpace())
1646 return getAddrSpaceCast(S, Ty);
1648 return getBitCast(S, Ty);
1651 Constant *ConstantExpr::getIntegerCast(Constant *C, Type *Ty,
1653 assert(C->getType()->isIntOrIntVectorTy() &&
1654 Ty->isIntOrIntVectorTy() && "Invalid cast");
1655 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1656 unsigned DstBits = Ty->getScalarSizeInBits();
1657 Instruction::CastOps opcode =
1658 (SrcBits == DstBits ? Instruction::BitCast :
1659 (SrcBits > DstBits ? Instruction::Trunc :
1660 (isSigned ? Instruction::SExt : Instruction::ZExt)));
1661 return getCast(opcode, C, Ty);
1664 Constant *ConstantExpr::getFPCast(Constant *C, Type *Ty) {
1665 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1667 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1668 unsigned DstBits = Ty->getScalarSizeInBits();
1669 if (SrcBits == DstBits)
1670 return C; // Avoid a useless cast
1671 Instruction::CastOps opcode =
1672 (SrcBits > DstBits ? Instruction::FPTrunc : Instruction::FPExt);
1673 return getCast(opcode, C, Ty);
1676 Constant *ConstantExpr::getTrunc(Constant *C, Type *Ty, bool OnlyIfReduced) {
1678 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1679 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1681 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1682 assert(C->getType()->isIntOrIntVectorTy() && "Trunc operand must be integer");
1683 assert(Ty->isIntOrIntVectorTy() && "Trunc produces only integral");
1684 assert(C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1685 "SrcTy must be larger than DestTy for Trunc!");
1687 return getFoldedCast(Instruction::Trunc, C, Ty, OnlyIfReduced);
1690 Constant *ConstantExpr::getSExt(Constant *C, Type *Ty, bool OnlyIfReduced) {
1692 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1693 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1695 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1696 assert(C->getType()->isIntOrIntVectorTy() && "SExt operand must be integral");
1697 assert(Ty->isIntOrIntVectorTy() && "SExt produces only integer");
1698 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1699 "SrcTy must be smaller than DestTy for SExt!");
1701 return getFoldedCast(Instruction::SExt, C, Ty, OnlyIfReduced);
1704 Constant *ConstantExpr::getZExt(Constant *C, Type *Ty, bool OnlyIfReduced) {
1706 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1707 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1709 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1710 assert(C->getType()->isIntOrIntVectorTy() && "ZEXt operand must be integral");
1711 assert(Ty->isIntOrIntVectorTy() && "ZExt produces only integer");
1712 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1713 "SrcTy must be smaller than DestTy for ZExt!");
1715 return getFoldedCast(Instruction::ZExt, C, Ty, OnlyIfReduced);
1718 Constant *ConstantExpr::getFPTrunc(Constant *C, Type *Ty, bool OnlyIfReduced) {
1720 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1721 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1723 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1724 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1725 C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1726 "This is an illegal floating point truncation!");
1727 return getFoldedCast(Instruction::FPTrunc, C, Ty, OnlyIfReduced);
1730 Constant *ConstantExpr::getFPExtend(Constant *C, Type *Ty, bool OnlyIfReduced) {
1732 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1733 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1735 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1736 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1737 C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1738 "This is an illegal floating point extension!");
1739 return getFoldedCast(Instruction::FPExt, C, Ty, OnlyIfReduced);
1742 Constant *ConstantExpr::getUIToFP(Constant *C, Type *Ty, bool OnlyIfReduced) {
1744 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1745 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1747 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1748 assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1749 "This is an illegal uint to floating point cast!");
1750 return getFoldedCast(Instruction::UIToFP, C, Ty, OnlyIfReduced);
1753 Constant *ConstantExpr::getSIToFP(Constant *C, Type *Ty, bool OnlyIfReduced) {
1755 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1756 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1758 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1759 assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1760 "This is an illegal sint to floating point cast!");
1761 return getFoldedCast(Instruction::SIToFP, C, Ty, OnlyIfReduced);
1764 Constant *ConstantExpr::getFPToUI(Constant *C, Type *Ty, bool OnlyIfReduced) {
1766 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1767 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1769 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1770 assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1771 "This is an illegal floating point to uint cast!");
1772 return getFoldedCast(Instruction::FPToUI, C, Ty, OnlyIfReduced);
1775 Constant *ConstantExpr::getFPToSI(Constant *C, Type *Ty, bool OnlyIfReduced) {
1777 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1778 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1780 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1781 assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1782 "This is an illegal floating point to sint cast!");
1783 return getFoldedCast(Instruction::FPToSI, C, Ty, OnlyIfReduced);
1786 Constant *ConstantExpr::getPtrToInt(Constant *C, Type *DstTy,
1787 bool OnlyIfReduced) {
1788 assert(C->getType()->getScalarType()->isPointerTy() &&
1789 "PtrToInt source must be pointer or pointer vector");
1790 assert(DstTy->getScalarType()->isIntegerTy() &&
1791 "PtrToInt destination must be integer or integer vector");
1792 assert(isa<VectorType>(C->getType()) == isa<VectorType>(DstTy));
1793 if (isa<VectorType>(C->getType()))
1794 assert(C->getType()->getVectorNumElements()==DstTy->getVectorNumElements()&&
1795 "Invalid cast between a different number of vector elements");
1796 return getFoldedCast(Instruction::PtrToInt, C, DstTy, OnlyIfReduced);
1799 Constant *ConstantExpr::getIntToPtr(Constant *C, Type *DstTy,
1800 bool OnlyIfReduced) {
1801 assert(C->getType()->getScalarType()->isIntegerTy() &&
1802 "IntToPtr source must be integer or integer vector");
1803 assert(DstTy->getScalarType()->isPointerTy() &&
1804 "IntToPtr destination must be a pointer or pointer vector");
1805 assert(isa<VectorType>(C->getType()) == isa<VectorType>(DstTy));
1806 if (isa<VectorType>(C->getType()))
1807 assert(C->getType()->getVectorNumElements()==DstTy->getVectorNumElements()&&
1808 "Invalid cast between a different number of vector elements");
1809 return getFoldedCast(Instruction::IntToPtr, C, DstTy, OnlyIfReduced);
1812 Constant *ConstantExpr::getBitCast(Constant *C, Type *DstTy,
1813 bool OnlyIfReduced) {
1814 assert(CastInst::castIsValid(Instruction::BitCast, C, DstTy) &&
1815 "Invalid constantexpr bitcast!");
1817 // It is common to ask for a bitcast of a value to its own type, handle this
1819 if (C->getType() == DstTy) return C;
1821 return getFoldedCast(Instruction::BitCast, C, DstTy, OnlyIfReduced);
1824 Constant *ConstantExpr::getAddrSpaceCast(Constant *C, Type *DstTy,
1825 bool OnlyIfReduced) {
1826 assert(CastInst::castIsValid(Instruction::AddrSpaceCast, C, DstTy) &&
1827 "Invalid constantexpr addrspacecast!");
1829 // Canonicalize addrspacecasts between different pointer types by first
1830 // bitcasting the pointer type and then converting the address space.
1831 PointerType *SrcScalarTy = cast<PointerType>(C->getType()->getScalarType());
1832 PointerType *DstScalarTy = cast<PointerType>(DstTy->getScalarType());
1833 Type *DstElemTy = DstScalarTy->getElementType();
1834 if (SrcScalarTy->getElementType() != DstElemTy) {
1835 Type *MidTy = PointerType::get(DstElemTy, SrcScalarTy->getAddressSpace());
1836 if (VectorType *VT = dyn_cast<VectorType>(DstTy)) {
1837 // Handle vectors of pointers.
1838 MidTy = VectorType::get(MidTy, VT->getNumElements());
1840 C = getBitCast(C, MidTy);
1842 return getFoldedCast(Instruction::AddrSpaceCast, C, DstTy, OnlyIfReduced);
1845 Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2,
1846 unsigned Flags, Type *OnlyIfReducedTy) {
1847 // Check the operands for consistency first.
1848 assert(Opcode >= Instruction::BinaryOpsBegin &&
1849 Opcode < Instruction::BinaryOpsEnd &&
1850 "Invalid opcode in binary constant expression");
1851 assert(C1->getType() == C2->getType() &&
1852 "Operand types in binary constant expression should match");
1856 case Instruction::Add:
1857 case Instruction::Sub:
1858 case Instruction::Mul:
1859 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1860 assert(C1->getType()->isIntOrIntVectorTy() &&
1861 "Tried to create an integer operation on a non-integer type!");
1863 case Instruction::FAdd:
1864 case Instruction::FSub:
1865 case Instruction::FMul:
1866 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1867 assert(C1->getType()->isFPOrFPVectorTy() &&
1868 "Tried to create a floating-point operation on a "
1869 "non-floating-point type!");
1871 case Instruction::UDiv:
1872 case Instruction::SDiv:
1873 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1874 assert(C1->getType()->isIntOrIntVectorTy() &&
1875 "Tried to create an arithmetic operation on a non-arithmetic type!");
1877 case Instruction::FDiv:
1878 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1879 assert(C1->getType()->isFPOrFPVectorTy() &&
1880 "Tried to create an arithmetic operation on a non-arithmetic type!");
1882 case Instruction::URem:
1883 case Instruction::SRem:
1884 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1885 assert(C1->getType()->isIntOrIntVectorTy() &&
1886 "Tried to create an arithmetic operation on a non-arithmetic type!");
1888 case Instruction::FRem:
1889 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1890 assert(C1->getType()->isFPOrFPVectorTy() &&
1891 "Tried to create an arithmetic operation on a non-arithmetic type!");
1893 case Instruction::And:
1894 case Instruction::Or:
1895 case Instruction::Xor:
1896 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1897 assert(C1->getType()->isIntOrIntVectorTy() &&
1898 "Tried to create a logical operation on a non-integral type!");
1900 case Instruction::Shl:
1901 case Instruction::LShr:
1902 case Instruction::AShr:
1903 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1904 assert(C1->getType()->isIntOrIntVectorTy() &&
1905 "Tried to create a shift operation on a non-integer type!");
1912 if (Constant *FC = ConstantFoldBinaryInstruction(Opcode, C1, C2))
1913 return FC; // Fold a few common cases.
1915 if (OnlyIfReducedTy == C1->getType())
1918 Constant *ArgVec[] = { C1, C2 };
1919 ConstantExprKeyType Key(Opcode, ArgVec, 0, Flags);
1921 LLVMContextImpl *pImpl = C1->getContext().pImpl;
1922 return pImpl->ExprConstants.getOrCreate(C1->getType(), Key);
1925 Constant *ConstantExpr::getSizeOf(Type* Ty) {
1926 // sizeof is implemented as: (i64) gep (Ty*)null, 1
1927 // Note that a non-inbounds gep is used, as null isn't within any object.
1928 Constant *GEPIdx = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1929 Constant *GEP = getGetElementPtr(
1930 Constant::getNullValue(PointerType::getUnqual(Ty)), GEPIdx);
1931 return getPtrToInt(GEP,
1932 Type::getInt64Ty(Ty->getContext()));
1935 Constant *ConstantExpr::getAlignOf(Type* Ty) {
1936 // alignof is implemented as: (i64) gep ({i1,Ty}*)null, 0, 1
1937 // Note that a non-inbounds gep is used, as null isn't within any object.
1939 StructType::get(Type::getInt1Ty(Ty->getContext()), Ty, nullptr);
1940 Constant *NullPtr = Constant::getNullValue(AligningTy->getPointerTo(0));
1941 Constant *Zero = ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0);
1942 Constant *One = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1943 Constant *Indices[2] = { Zero, One };
1944 Constant *GEP = getGetElementPtr(NullPtr, Indices);
1945 return getPtrToInt(GEP,
1946 Type::getInt64Ty(Ty->getContext()));
1949 Constant *ConstantExpr::getOffsetOf(StructType* STy, unsigned FieldNo) {
1950 return getOffsetOf(STy, ConstantInt::get(Type::getInt32Ty(STy->getContext()),
1954 Constant *ConstantExpr::getOffsetOf(Type* Ty, Constant *FieldNo) {
1955 // offsetof is implemented as: (i64) gep (Ty*)null, 0, FieldNo
1956 // Note that a non-inbounds gep is used, as null isn't within any object.
1957 Constant *GEPIdx[] = {
1958 ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0),
1961 Constant *GEP = getGetElementPtr(
1962 Constant::getNullValue(PointerType::getUnqual(Ty)), GEPIdx);
1963 return getPtrToInt(GEP,
1964 Type::getInt64Ty(Ty->getContext()));
1967 Constant *ConstantExpr::getCompare(unsigned short Predicate, Constant *C1,
1968 Constant *C2, bool OnlyIfReduced) {
1969 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1971 switch (Predicate) {
1972 default: llvm_unreachable("Invalid CmpInst predicate");
1973 case CmpInst::FCMP_FALSE: case CmpInst::FCMP_OEQ: case CmpInst::FCMP_OGT:
1974 case CmpInst::FCMP_OGE: case CmpInst::FCMP_OLT: case CmpInst::FCMP_OLE:
1975 case CmpInst::FCMP_ONE: case CmpInst::FCMP_ORD: case CmpInst::FCMP_UNO:
1976 case CmpInst::FCMP_UEQ: case CmpInst::FCMP_UGT: case CmpInst::FCMP_UGE:
1977 case CmpInst::FCMP_ULT: case CmpInst::FCMP_ULE: case CmpInst::FCMP_UNE:
1978 case CmpInst::FCMP_TRUE:
1979 return getFCmp(Predicate, C1, C2, OnlyIfReduced);
1981 case CmpInst::ICMP_EQ: case CmpInst::ICMP_NE: case CmpInst::ICMP_UGT:
1982 case CmpInst::ICMP_UGE: case CmpInst::ICMP_ULT: case CmpInst::ICMP_ULE:
1983 case CmpInst::ICMP_SGT: case CmpInst::ICMP_SGE: case CmpInst::ICMP_SLT:
1984 case CmpInst::ICMP_SLE:
1985 return getICmp(Predicate, C1, C2, OnlyIfReduced);
1989 Constant *ConstantExpr::getSelect(Constant *C, Constant *V1, Constant *V2,
1990 Type *OnlyIfReducedTy) {
1991 assert(!SelectInst::areInvalidOperands(C, V1, V2)&&"Invalid select operands");
1993 if (Constant *SC = ConstantFoldSelectInstruction(C, V1, V2))
1994 return SC; // Fold common cases
1996 if (OnlyIfReducedTy == V1->getType())
1999 Constant *ArgVec[] = { C, V1, V2 };
2000 ConstantExprKeyType Key(Instruction::Select, ArgVec);
2002 LLVMContextImpl *pImpl = C->getContext().pImpl;
2003 return pImpl->ExprConstants.getOrCreate(V1->getType(), Key);
2006 Constant *ConstantExpr::getGetElementPtr(Constant *C, ArrayRef<Value *> Idxs,
2007 bool InBounds, Type *OnlyIfReducedTy) {
2008 assert(C->getType()->isPtrOrPtrVectorTy() &&
2009 "Non-pointer type for constant GetElementPtr expression");
2011 if (Constant *FC = ConstantFoldGetElementPtr(C, InBounds, Idxs))
2012 return FC; // Fold a few common cases.
2014 // Get the result type of the getelementptr!
2015 Type *Ty = GetElementPtrInst::getIndexedType(C->getType(), Idxs);
2016 assert(Ty && "GEP indices invalid!");
2017 unsigned AS = C->getType()->getPointerAddressSpace();
2018 Type *ReqTy = Ty->getPointerTo(AS);
2019 if (VectorType *VecTy = dyn_cast<VectorType>(C->getType()))
2020 ReqTy = VectorType::get(ReqTy, VecTy->getNumElements());
2022 if (OnlyIfReducedTy == ReqTy)
2025 // Look up the constant in the table first to ensure uniqueness
2026 std::vector<Constant*> ArgVec;
2027 ArgVec.reserve(1 + Idxs.size());
2028 ArgVec.push_back(C);
2029 for (unsigned i = 0, e = Idxs.size(); i != e; ++i) {
2030 assert(Idxs[i]->getType()->isVectorTy() == ReqTy->isVectorTy() &&
2031 "getelementptr index type missmatch");
2032 assert((!Idxs[i]->getType()->isVectorTy() ||
2033 ReqTy->getVectorNumElements() ==
2034 Idxs[i]->getType()->getVectorNumElements()) &&
2035 "getelementptr index type missmatch");
2036 ArgVec.push_back(cast<Constant>(Idxs[i]));
2038 const ConstantExprKeyType Key(Instruction::GetElementPtr, ArgVec, 0,
2039 InBounds ? GEPOperator::IsInBounds : 0);
2041 LLVMContextImpl *pImpl = C->getContext().pImpl;
2042 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2045 Constant *ConstantExpr::getICmp(unsigned short pred, Constant *LHS,
2046 Constant *RHS, bool OnlyIfReduced) {
2047 assert(LHS->getType() == RHS->getType());
2048 assert(pred >= ICmpInst::FIRST_ICMP_PREDICATE &&
2049 pred <= ICmpInst::LAST_ICMP_PREDICATE && "Invalid ICmp Predicate");
2051 if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
2052 return FC; // Fold a few common cases...
2057 // Look up the constant in the table first to ensure uniqueness
2058 Constant *ArgVec[] = { LHS, RHS };
2059 // Get the key type with both the opcode and predicate
2060 const ConstantExprKeyType Key(Instruction::ICmp, ArgVec, pred);
2062 Type *ResultTy = Type::getInt1Ty(LHS->getContext());
2063 if (VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
2064 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
2066 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
2067 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
2070 Constant *ConstantExpr::getFCmp(unsigned short pred, Constant *LHS,
2071 Constant *RHS, bool OnlyIfReduced) {
2072 assert(LHS->getType() == RHS->getType());
2073 assert(pred <= FCmpInst::LAST_FCMP_PREDICATE && "Invalid FCmp Predicate");
2075 if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
2076 return FC; // Fold a few common cases...
2081 // Look up the constant in the table first to ensure uniqueness
2082 Constant *ArgVec[] = { LHS, RHS };
2083 // Get the key type with both the opcode and predicate
2084 const ConstantExprKeyType Key(Instruction::FCmp, ArgVec, pred);
2086 Type *ResultTy = Type::getInt1Ty(LHS->getContext());
2087 if (VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
2088 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
2090 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
2091 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
2094 Constant *ConstantExpr::getExtractElement(Constant *Val, Constant *Idx,
2095 Type *OnlyIfReducedTy) {
2096 assert(Val->getType()->isVectorTy() &&
2097 "Tried to create extractelement operation on non-vector type!");
2098 assert(Idx->getType()->isIntegerTy() &&
2099 "Extractelement index must be an integer type!");
2101 if (Constant *FC = ConstantFoldExtractElementInstruction(Val, Idx))
2102 return FC; // Fold a few common cases.
2104 Type *ReqTy = Val->getType()->getVectorElementType();
2105 if (OnlyIfReducedTy == ReqTy)
2108 // Look up the constant in the table first to ensure uniqueness
2109 Constant *ArgVec[] = { Val, Idx };
2110 const ConstantExprKeyType Key(Instruction::ExtractElement, ArgVec);
2112 LLVMContextImpl *pImpl = Val->getContext().pImpl;
2113 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2116 Constant *ConstantExpr::getInsertElement(Constant *Val, Constant *Elt,
2117 Constant *Idx, Type *OnlyIfReducedTy) {
2118 assert(Val->getType()->isVectorTy() &&
2119 "Tried to create insertelement operation on non-vector type!");
2120 assert(Elt->getType() == Val->getType()->getVectorElementType() &&
2121 "Insertelement types must match!");
2122 assert(Idx->getType()->isIntegerTy() &&
2123 "Insertelement index must be i32 type!");
2125 if (Constant *FC = ConstantFoldInsertElementInstruction(Val, Elt, Idx))
2126 return FC; // Fold a few common cases.
2128 if (OnlyIfReducedTy == Val->getType())
2131 // Look up the constant in the table first to ensure uniqueness
2132 Constant *ArgVec[] = { Val, Elt, Idx };
2133 const ConstantExprKeyType Key(Instruction::InsertElement, ArgVec);
2135 LLVMContextImpl *pImpl = Val->getContext().pImpl;
2136 return pImpl->ExprConstants.getOrCreate(Val->getType(), Key);
2139 Constant *ConstantExpr::getShuffleVector(Constant *V1, Constant *V2,
2140 Constant *Mask, Type *OnlyIfReducedTy) {
2141 assert(ShuffleVectorInst::isValidOperands(V1, V2, Mask) &&
2142 "Invalid shuffle vector constant expr operands!");
2144 if (Constant *FC = ConstantFoldShuffleVectorInstruction(V1, V2, Mask))
2145 return FC; // Fold a few common cases.
2147 unsigned NElts = Mask->getType()->getVectorNumElements();
2148 Type *EltTy = V1->getType()->getVectorElementType();
2149 Type *ShufTy = VectorType::get(EltTy, NElts);
2151 if (OnlyIfReducedTy == ShufTy)
2154 // Look up the constant in the table first to ensure uniqueness
2155 Constant *ArgVec[] = { V1, V2, Mask };
2156 const ConstantExprKeyType Key(Instruction::ShuffleVector, ArgVec);
2158 LLVMContextImpl *pImpl = ShufTy->getContext().pImpl;
2159 return pImpl->ExprConstants.getOrCreate(ShufTy, Key);
2162 Constant *ConstantExpr::getInsertValue(Constant *Agg, Constant *Val,
2163 ArrayRef<unsigned> Idxs,
2164 Type *OnlyIfReducedTy) {
2165 assert(Agg->getType()->isFirstClassType() &&
2166 "Non-first-class type for constant insertvalue expression");
2168 assert(ExtractValueInst::getIndexedType(Agg->getType(),
2169 Idxs) == Val->getType() &&
2170 "insertvalue indices invalid!");
2171 Type *ReqTy = Val->getType();
2173 if (Constant *FC = ConstantFoldInsertValueInstruction(Agg, Val, Idxs))
2176 if (OnlyIfReducedTy == ReqTy)
2179 Constant *ArgVec[] = { Agg, Val };
2180 const ConstantExprKeyType Key(Instruction::InsertValue, ArgVec, 0, 0, Idxs);
2182 LLVMContextImpl *pImpl = Agg->getContext().pImpl;
2183 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2186 Constant *ConstantExpr::getExtractValue(Constant *Agg, ArrayRef<unsigned> Idxs,
2187 Type *OnlyIfReducedTy) {
2188 assert(Agg->getType()->isFirstClassType() &&
2189 "Tried to create extractelement operation on non-first-class type!");
2191 Type *ReqTy = ExtractValueInst::getIndexedType(Agg->getType(), Idxs);
2193 assert(ReqTy && "extractvalue indices invalid!");
2195 assert(Agg->getType()->isFirstClassType() &&
2196 "Non-first-class type for constant extractvalue expression");
2197 if (Constant *FC = ConstantFoldExtractValueInstruction(Agg, Idxs))
2200 if (OnlyIfReducedTy == ReqTy)
2203 Constant *ArgVec[] = { Agg };
2204 const ConstantExprKeyType Key(Instruction::ExtractValue, ArgVec, 0, 0, Idxs);
2206 LLVMContextImpl *pImpl = Agg->getContext().pImpl;
2207 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2210 Constant *ConstantExpr::getNeg(Constant *C, bool HasNUW, bool HasNSW) {
2211 assert(C->getType()->isIntOrIntVectorTy() &&
2212 "Cannot NEG a nonintegral value!");
2213 return getSub(ConstantFP::getZeroValueForNegation(C->getType()),
2217 Constant *ConstantExpr::getFNeg(Constant *C) {
2218 assert(C->getType()->isFPOrFPVectorTy() &&
2219 "Cannot FNEG a non-floating-point value!");
2220 return getFSub(ConstantFP::getZeroValueForNegation(C->getType()), C);
2223 Constant *ConstantExpr::getNot(Constant *C) {
2224 assert(C->getType()->isIntOrIntVectorTy() &&
2225 "Cannot NOT a nonintegral value!");
2226 return get(Instruction::Xor, C, Constant::getAllOnesValue(C->getType()));
2229 Constant *ConstantExpr::getAdd(Constant *C1, Constant *C2,
2230 bool HasNUW, bool HasNSW) {
2231 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2232 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2233 return get(Instruction::Add, C1, C2, Flags);
2236 Constant *ConstantExpr::getFAdd(Constant *C1, Constant *C2) {
2237 return get(Instruction::FAdd, C1, C2);
2240 Constant *ConstantExpr::getSub(Constant *C1, Constant *C2,
2241 bool HasNUW, bool HasNSW) {
2242 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2243 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2244 return get(Instruction::Sub, C1, C2, Flags);
2247 Constant *ConstantExpr::getFSub(Constant *C1, Constant *C2) {
2248 return get(Instruction::FSub, C1, C2);
2251 Constant *ConstantExpr::getMul(Constant *C1, Constant *C2,
2252 bool HasNUW, bool HasNSW) {
2253 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2254 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2255 return get(Instruction::Mul, C1, C2, Flags);
2258 Constant *ConstantExpr::getFMul(Constant *C1, Constant *C2) {
2259 return get(Instruction::FMul, C1, C2);
2262 Constant *ConstantExpr::getUDiv(Constant *C1, Constant *C2, bool isExact) {
2263 return get(Instruction::UDiv, C1, C2,
2264 isExact ? PossiblyExactOperator::IsExact : 0);
2267 Constant *ConstantExpr::getSDiv(Constant *C1, Constant *C2, bool isExact) {
2268 return get(Instruction::SDiv, C1, C2,
2269 isExact ? PossiblyExactOperator::IsExact : 0);
2272 Constant *ConstantExpr::getFDiv(Constant *C1, Constant *C2) {
2273 return get(Instruction::FDiv, C1, C2);
2276 Constant *ConstantExpr::getURem(Constant *C1, Constant *C2) {
2277 return get(Instruction::URem, C1, C2);
2280 Constant *ConstantExpr::getSRem(Constant *C1, Constant *C2) {
2281 return get(Instruction::SRem, C1, C2);
2284 Constant *ConstantExpr::getFRem(Constant *C1, Constant *C2) {
2285 return get(Instruction::FRem, C1, C2);
2288 Constant *ConstantExpr::getAnd(Constant *C1, Constant *C2) {
2289 return get(Instruction::And, C1, C2);
2292 Constant *ConstantExpr::getOr(Constant *C1, Constant *C2) {
2293 return get(Instruction::Or, C1, C2);
2296 Constant *ConstantExpr::getXor(Constant *C1, Constant *C2) {
2297 return get(Instruction::Xor, C1, C2);
2300 Constant *ConstantExpr::getShl(Constant *C1, Constant *C2,
2301 bool HasNUW, bool HasNSW) {
2302 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2303 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2304 return get(Instruction::Shl, C1, C2, Flags);
2307 Constant *ConstantExpr::getLShr(Constant *C1, Constant *C2, bool isExact) {
2308 return get(Instruction::LShr, C1, C2,
2309 isExact ? PossiblyExactOperator::IsExact : 0);
2312 Constant *ConstantExpr::getAShr(Constant *C1, Constant *C2, bool isExact) {
2313 return get(Instruction::AShr, C1, C2,
2314 isExact ? PossiblyExactOperator::IsExact : 0);
2317 /// getBinOpIdentity - Return the identity for the given binary operation,
2318 /// i.e. a constant C such that X op C = X and C op X = X for every X. It
2319 /// returns null if the operator doesn't have an identity.
2320 Constant *ConstantExpr::getBinOpIdentity(unsigned Opcode, Type *Ty) {
2323 // Doesn't have an identity.
2326 case Instruction::Add:
2327 case Instruction::Or:
2328 case Instruction::Xor:
2329 return Constant::getNullValue(Ty);
2331 case Instruction::Mul:
2332 return ConstantInt::get(Ty, 1);
2334 case Instruction::And:
2335 return Constant::getAllOnesValue(Ty);
2339 /// getBinOpAbsorber - Return the absorbing element for the given binary
2340 /// operation, i.e. a constant C such that X op C = C and C op X = C for
2341 /// every X. For example, this returns zero for integer multiplication.
2342 /// It returns null if the operator doesn't have an absorbing element.
2343 Constant *ConstantExpr::getBinOpAbsorber(unsigned Opcode, Type *Ty) {
2346 // Doesn't have an absorber.
2349 case Instruction::Or:
2350 return Constant::getAllOnesValue(Ty);
2352 case Instruction::And:
2353 case Instruction::Mul:
2354 return Constant::getNullValue(Ty);
2358 // destroyConstant - Remove the constant from the constant table...
2360 void ConstantExpr::destroyConstant() {
2361 getType()->getContext().pImpl->ExprConstants.remove(this);
2362 destroyConstantImpl();
2365 const char *ConstantExpr::getOpcodeName() const {
2366 return Instruction::getOpcodeName(getOpcode());
2371 GetElementPtrConstantExpr::
2372 GetElementPtrConstantExpr(Constant *C, ArrayRef<Constant*> IdxList,
2374 : ConstantExpr(DestTy, Instruction::GetElementPtr,
2375 OperandTraits<GetElementPtrConstantExpr>::op_end(this)
2376 - (IdxList.size()+1), IdxList.size()+1) {
2378 for (unsigned i = 0, E = IdxList.size(); i != E; ++i)
2379 OperandList[i+1] = IdxList[i];
2382 //===----------------------------------------------------------------------===//
2383 // ConstantData* implementations
2385 void ConstantDataArray::anchor() {}
2386 void ConstantDataVector::anchor() {}
2388 /// getElementType - Return the element type of the array/vector.
2389 Type *ConstantDataSequential::getElementType() const {
2390 return getType()->getElementType();
2393 StringRef ConstantDataSequential::getRawDataValues() const {
2394 return StringRef(DataElements, getNumElements()*getElementByteSize());
2397 /// isElementTypeCompatible - Return true if a ConstantDataSequential can be
2398 /// formed with a vector or array of the specified element type.
2399 /// ConstantDataArray only works with normal float and int types that are
2400 /// stored densely in memory, not with things like i42 or x86_f80.
2401 bool ConstantDataSequential::isElementTypeCompatible(const Type *Ty) {
2402 if (Ty->isFloatTy() || Ty->isDoubleTy()) return true;
2403 if (const IntegerType *IT = dyn_cast<IntegerType>(Ty)) {
2404 switch (IT->getBitWidth()) {
2416 /// getNumElements - Return the number of elements in the array or vector.
2417 unsigned ConstantDataSequential::getNumElements() const {
2418 if (ArrayType *AT = dyn_cast<ArrayType>(getType()))
2419 return AT->getNumElements();
2420 return getType()->getVectorNumElements();
2424 /// getElementByteSize - Return the size in bytes of the elements in the data.
2425 uint64_t ConstantDataSequential::getElementByteSize() const {
2426 return getElementType()->getPrimitiveSizeInBits()/8;
2429 /// getElementPointer - Return the start of the specified element.
2430 const char *ConstantDataSequential::getElementPointer(unsigned Elt) const {
2431 assert(Elt < getNumElements() && "Invalid Elt");
2432 return DataElements+Elt*getElementByteSize();
2436 /// isAllZeros - return true if the array is empty or all zeros.
2437 static bool isAllZeros(StringRef Arr) {
2438 for (StringRef::iterator I = Arr.begin(), E = Arr.end(); I != E; ++I)
2444 /// getImpl - This is the underlying implementation of all of the
2445 /// ConstantDataSequential::get methods. They all thunk down to here, providing
2446 /// the correct element type. We take the bytes in as a StringRef because
2447 /// we *want* an underlying "char*" to avoid TBAA type punning violations.
2448 Constant *ConstantDataSequential::getImpl(StringRef Elements, Type *Ty) {
2449 assert(isElementTypeCompatible(Ty->getSequentialElementType()));
2450 // If the elements are all zero or there are no elements, return a CAZ, which
2451 // is more dense and canonical.
2452 if (isAllZeros(Elements))
2453 return ConstantAggregateZero::get(Ty);
2455 // Do a lookup to see if we have already formed one of these.
2458 .pImpl->CDSConstants.insert(std::make_pair(Elements, nullptr))
2461 // The bucket can point to a linked list of different CDS's that have the same
2462 // body but different types. For example, 0,0,0,1 could be a 4 element array
2463 // of i8, or a 1-element array of i32. They'll both end up in the same
2464 /// StringMap bucket, linked up by their Next pointers. Walk the list.
2465 ConstantDataSequential **Entry = &Slot.second;
2466 for (ConstantDataSequential *Node = *Entry; Node;
2467 Entry = &Node->Next, Node = *Entry)
2468 if (Node->getType() == Ty)
2471 // Okay, we didn't get a hit. Create a node of the right class, link it in,
2473 if (isa<ArrayType>(Ty))
2474 return *Entry = new ConstantDataArray(Ty, Slot.first().data());
2476 assert(isa<VectorType>(Ty));
2477 return *Entry = new ConstantDataVector(Ty, Slot.first().data());
2480 void ConstantDataSequential::destroyConstant() {
2481 // Remove the constant from the StringMap.
2482 StringMap<ConstantDataSequential*> &CDSConstants =
2483 getType()->getContext().pImpl->CDSConstants;
2485 StringMap<ConstantDataSequential*>::iterator Slot =
2486 CDSConstants.find(getRawDataValues());
2488 assert(Slot != CDSConstants.end() && "CDS not found in uniquing table");
2490 ConstantDataSequential **Entry = &Slot->getValue();
2492 // Remove the entry from the hash table.
2493 if (!(*Entry)->Next) {
2494 // If there is only one value in the bucket (common case) it must be this
2495 // entry, and removing the entry should remove the bucket completely.
2496 assert((*Entry) == this && "Hash mismatch in ConstantDataSequential");
2497 getContext().pImpl->CDSConstants.erase(Slot);
2499 // Otherwise, there are multiple entries linked off the bucket, unlink the
2500 // node we care about but keep the bucket around.
2501 for (ConstantDataSequential *Node = *Entry; ;
2502 Entry = &Node->Next, Node = *Entry) {
2503 assert(Node && "Didn't find entry in its uniquing hash table!");
2504 // If we found our entry, unlink it from the list and we're done.
2506 *Entry = Node->Next;
2512 // If we were part of a list, make sure that we don't delete the list that is
2513 // still owned by the uniquing map.
2516 // Finally, actually delete it.
2517 destroyConstantImpl();
2520 /// get() constructors - Return a constant with array type with an element
2521 /// count and element type matching the ArrayRef passed in. Note that this
2522 /// can return a ConstantAggregateZero object.
2523 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint8_t> Elts) {
2524 Type *Ty = ArrayType::get(Type::getInt8Ty(Context), Elts.size());
2525 const char *Data = reinterpret_cast<const char *>(Elts.data());
2526 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*1), Ty);
2528 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint16_t> Elts){
2529 Type *Ty = ArrayType::get(Type::getInt16Ty(Context), Elts.size());
2530 const char *Data = reinterpret_cast<const char *>(Elts.data());
2531 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*2), Ty);
2533 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint32_t> Elts){
2534 Type *Ty = ArrayType::get(Type::getInt32Ty(Context), Elts.size());
2535 const char *Data = reinterpret_cast<const char *>(Elts.data());
2536 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2538 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint64_t> Elts){
2539 Type *Ty = ArrayType::get(Type::getInt64Ty(Context), Elts.size());
2540 const char *Data = reinterpret_cast<const char *>(Elts.data());
2541 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*8), Ty);
2543 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<float> Elts) {
2544 Type *Ty = ArrayType::get(Type::getFloatTy(Context), Elts.size());
2545 const char *Data = reinterpret_cast<const char *>(Elts.data());
2546 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2548 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<double> Elts) {
2549 Type *Ty = ArrayType::get(Type::getDoubleTy(Context), Elts.size());
2550 const char *Data = reinterpret_cast<const char *>(Elts.data());
2551 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2554 /// getFP() constructors - Return a constant with array type with an element
2555 /// count and element type of float with precision matching the number of
2556 /// bits in the ArrayRef passed in. (i.e. half for 16bits, float for 32bits,
2557 /// double for 64bits) Note that this can return a ConstantAggregateZero
2559 Constant *ConstantDataArray::getFP(LLVMContext &Context,
2560 ArrayRef<uint16_t> Elts) {
2561 Type *Ty = VectorType::get(Type::getHalfTy(Context), Elts.size());
2562 const char *Data = reinterpret_cast<const char *>(Elts.data());
2563 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 2), Ty);
2565 Constant *ConstantDataArray::getFP(LLVMContext &Context,
2566 ArrayRef<uint32_t> Elts) {
2567 Type *Ty = ArrayType::get(Type::getFloatTy(Context), Elts.size());
2568 const char *Data = reinterpret_cast<const char *>(Elts.data());
2569 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 4), Ty);
2571 Constant *ConstantDataArray::getFP(LLVMContext &Context,
2572 ArrayRef<uint64_t> Elts) {
2573 Type *Ty = ArrayType::get(Type::getDoubleTy(Context), Elts.size());
2574 const char *Data = reinterpret_cast<const char *>(Elts.data());
2575 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2578 /// getString - This method constructs a CDS and initializes it with a text
2579 /// string. The default behavior (AddNull==true) causes a null terminator to
2580 /// be placed at the end of the array (increasing the length of the string by
2581 /// one more than the StringRef would normally indicate. Pass AddNull=false
2582 /// to disable this behavior.
2583 Constant *ConstantDataArray::getString(LLVMContext &Context,
2584 StringRef Str, bool AddNull) {
2586 const uint8_t *Data = reinterpret_cast<const uint8_t *>(Str.data());
2587 return get(Context, makeArrayRef(const_cast<uint8_t *>(Data),
2591 SmallVector<uint8_t, 64> ElementVals;
2592 ElementVals.append(Str.begin(), Str.end());
2593 ElementVals.push_back(0);
2594 return get(Context, ElementVals);
2597 /// get() constructors - Return a constant with vector type with an element
2598 /// count and element type matching the ArrayRef passed in. Note that this
2599 /// can return a ConstantAggregateZero object.
2600 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint8_t> Elts){
2601 Type *Ty = VectorType::get(Type::getInt8Ty(Context), Elts.size());
2602 const char *Data = reinterpret_cast<const char *>(Elts.data());
2603 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*1), Ty);
2605 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint16_t> Elts){
2606 Type *Ty = VectorType::get(Type::getInt16Ty(Context), Elts.size());
2607 const char *Data = reinterpret_cast<const char *>(Elts.data());
2608 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*2), Ty);
2610 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint32_t> Elts){
2611 Type *Ty = VectorType::get(Type::getInt32Ty(Context), Elts.size());
2612 const char *Data = reinterpret_cast<const char *>(Elts.data());
2613 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2615 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint64_t> Elts){
2616 Type *Ty = VectorType::get(Type::getInt64Ty(Context), Elts.size());
2617 const char *Data = reinterpret_cast<const char *>(Elts.data());
2618 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*8), Ty);
2620 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<float> Elts) {
2621 Type *Ty = VectorType::get(Type::getFloatTy(Context), Elts.size());
2622 const char *Data = reinterpret_cast<const char *>(Elts.data());
2623 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2625 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<double> Elts) {
2626 Type *Ty = VectorType::get(Type::getDoubleTy(Context), Elts.size());
2627 const char *Data = reinterpret_cast<const char *>(Elts.data());
2628 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2631 /// getFP() constructors - Return a constant with vector type with an element
2632 /// count and element type of float with the precision matching the number of
2633 /// bits in the ArrayRef passed in. (i.e. half for 16bits, float for 32bits,
2634 /// double for 64bits) Note that this can return a ConstantAggregateZero
2636 Constant *ConstantDataVector::getFP(LLVMContext &Context,
2637 ArrayRef<uint16_t> Elts) {
2638 Type *Ty = VectorType::get(Type::getHalfTy(Context), Elts.size());
2639 const char *Data = reinterpret_cast<const char *>(Elts.data());
2640 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 2), Ty);
2642 Constant *ConstantDataVector::getFP(LLVMContext &Context,
2643 ArrayRef<uint32_t> Elts) {
2644 Type *Ty = VectorType::get(Type::getFloatTy(Context), Elts.size());
2645 const char *Data = reinterpret_cast<const char *>(Elts.data());
2646 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 4), Ty);
2648 Constant *ConstantDataVector::getFP(LLVMContext &Context,
2649 ArrayRef<uint64_t> Elts) {
2650 Type *Ty = VectorType::get(Type::getDoubleTy(Context), Elts.size());
2651 const char *Data = reinterpret_cast<const char *>(Elts.data());
2652 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2655 Constant *ConstantDataVector::getSplat(unsigned NumElts, Constant *V) {
2656 assert(isElementTypeCompatible(V->getType()) &&
2657 "Element type not compatible with ConstantData");
2658 if (ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
2659 if (CI->getType()->isIntegerTy(8)) {
2660 SmallVector<uint8_t, 16> Elts(NumElts, CI->getZExtValue());
2661 return get(V->getContext(), Elts);
2663 if (CI->getType()->isIntegerTy(16)) {
2664 SmallVector<uint16_t, 16> Elts(NumElts, CI->getZExtValue());
2665 return get(V->getContext(), Elts);
2667 if (CI->getType()->isIntegerTy(32)) {
2668 SmallVector<uint32_t, 16> Elts(NumElts, CI->getZExtValue());
2669 return get(V->getContext(), Elts);
2671 assert(CI->getType()->isIntegerTy(64) && "Unsupported ConstantData type");
2672 SmallVector<uint64_t, 16> Elts(NumElts, CI->getZExtValue());
2673 return get(V->getContext(), Elts);
2676 if (ConstantFP *CFP = dyn_cast<ConstantFP>(V)) {
2677 if (CFP->getType()->isFloatTy()) {
2678 SmallVector<uint32_t, 16> Elts(
2679 NumElts, CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
2680 return getFP(V->getContext(), Elts);
2682 if (CFP->getType()->isDoubleTy()) {
2683 SmallVector<uint64_t, 16> Elts(
2684 NumElts, CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
2685 return getFP(V->getContext(), Elts);
2688 return ConstantVector::getSplat(NumElts, V);
2692 /// getElementAsInteger - If this is a sequential container of integers (of
2693 /// any size), return the specified element in the low bits of a uint64_t.
2694 uint64_t ConstantDataSequential::getElementAsInteger(unsigned Elt) const {
2695 assert(isa<IntegerType>(getElementType()) &&
2696 "Accessor can only be used when element is an integer");
2697 const char *EltPtr = getElementPointer(Elt);
2699 // The data is stored in host byte order, make sure to cast back to the right
2700 // type to load with the right endianness.
2701 switch (getElementType()->getIntegerBitWidth()) {
2702 default: llvm_unreachable("Invalid bitwidth for CDS");
2704 return *const_cast<uint8_t *>(reinterpret_cast<const uint8_t *>(EltPtr));
2706 return *const_cast<uint16_t *>(reinterpret_cast<const uint16_t *>(EltPtr));
2708 return *const_cast<uint32_t *>(reinterpret_cast<const uint32_t *>(EltPtr));
2710 return *const_cast<uint64_t *>(reinterpret_cast<const uint64_t *>(EltPtr));
2714 /// getElementAsAPFloat - If this is a sequential container of floating point
2715 /// type, return the specified element as an APFloat.
2716 APFloat ConstantDataSequential::getElementAsAPFloat(unsigned Elt) const {
2717 const char *EltPtr = getElementPointer(Elt);
2719 switch (getElementType()->getTypeID()) {
2721 llvm_unreachable("Accessor can only be used when element is float/double!");
2722 case Type::FloatTyID: {
2723 auto EltVal = *reinterpret_cast<const uint32_t *>(EltPtr);
2724 return APFloat(APFloat::IEEEsingle, APInt(32, EltVal));
2726 case Type::DoubleTyID: {
2727 auto EltVal = *reinterpret_cast<const uint64_t *>(EltPtr);
2728 return APFloat(APFloat::IEEEdouble, APInt(64, EltVal));
2733 /// getElementAsFloat - If this is an sequential container of floats, return
2734 /// the specified element as a float.
2735 float ConstantDataSequential::getElementAsFloat(unsigned Elt) const {
2736 assert(getElementType()->isFloatTy() &&
2737 "Accessor can only be used when element is a 'float'");
2738 const float *EltPtr = reinterpret_cast<const float *>(getElementPointer(Elt));
2739 return *const_cast<float *>(EltPtr);
2742 /// getElementAsDouble - If this is an sequential container of doubles, return
2743 /// the specified element as a float.
2744 double ConstantDataSequential::getElementAsDouble(unsigned Elt) const {
2745 assert(getElementType()->isDoubleTy() &&
2746 "Accessor can only be used when element is a 'float'");
2747 const double *EltPtr =
2748 reinterpret_cast<const double *>(getElementPointer(Elt));
2749 return *const_cast<double *>(EltPtr);
2752 /// getElementAsConstant - Return a Constant for a specified index's element.
2753 /// Note that this has to compute a new constant to return, so it isn't as
2754 /// efficient as getElementAsInteger/Float/Double.
2755 Constant *ConstantDataSequential::getElementAsConstant(unsigned Elt) const {
2756 if (getElementType()->isFloatTy() || getElementType()->isDoubleTy())
2757 return ConstantFP::get(getContext(), getElementAsAPFloat(Elt));
2759 return ConstantInt::get(getElementType(), getElementAsInteger(Elt));
2762 /// isString - This method returns true if this is an array of i8.
2763 bool ConstantDataSequential::isString() const {
2764 return isa<ArrayType>(getType()) && getElementType()->isIntegerTy(8);
2767 /// isCString - This method returns true if the array "isString", ends with a
2768 /// nul byte, and does not contains any other nul bytes.
2769 bool ConstantDataSequential::isCString() const {
2773 StringRef Str = getAsString();
2775 // The last value must be nul.
2776 if (Str.back() != 0) return false;
2778 // Other elements must be non-nul.
2779 return Str.drop_back().find(0) == StringRef::npos;
2782 /// getSplatValue - If this is a splat constant, meaning that all of the
2783 /// elements have the same value, return that value. Otherwise return nullptr.
2784 Constant *ConstantDataVector::getSplatValue() const {
2785 const char *Base = getRawDataValues().data();
2787 // Compare elements 1+ to the 0'th element.
2788 unsigned EltSize = getElementByteSize();
2789 for (unsigned i = 1, e = getNumElements(); i != e; ++i)
2790 if (memcmp(Base, Base+i*EltSize, EltSize))
2793 // If they're all the same, return the 0th one as a representative.
2794 return getElementAsConstant(0);
2797 //===----------------------------------------------------------------------===//
2798 // replaceUsesOfWithOnConstant implementations
2800 /// replaceUsesOfWithOnConstant - Update this constant array to change uses of
2801 /// 'From' to be uses of 'To'. This must update the uniquing data structures
2804 /// Note that we intentionally replace all uses of From with To here. Consider
2805 /// a large array that uses 'From' 1000 times. By handling this case all here,
2806 /// ConstantArray::replaceUsesOfWithOnConstant is only invoked once, and that
2807 /// single invocation handles all 1000 uses. Handling them one at a time would
2808 /// work, but would be really slow because it would have to unique each updated
2811 void Constant::replaceUsesOfWithOnConstantImpl(Constant *Replacement) {
2812 // I do need to replace this with an existing value.
2813 assert(Replacement != this && "I didn't contain From!");
2815 // Everyone using this now uses the replacement.
2816 replaceAllUsesWith(Replacement);
2818 // Delete the old constant!
2822 void ConstantArray::replaceUsesOfWithOnConstant(Value *From, Value *To,
2824 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2825 Constant *ToC = cast<Constant>(To);
2827 SmallVector<Constant*, 8> Values;
2828 Values.reserve(getNumOperands()); // Build replacement array.
2830 // Fill values with the modified operands of the constant array. Also,
2831 // compute whether this turns into an all-zeros array.
2832 unsigned NumUpdated = 0;
2834 // Keep track of whether all the values in the array are "ToC".
2835 bool AllSame = true;
2836 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2837 Constant *Val = cast<Constant>(O->get());
2842 Values.push_back(Val);
2843 AllSame &= Val == ToC;
2846 if (AllSame && ToC->isNullValue()) {
2847 replaceUsesOfWithOnConstantImpl(ConstantAggregateZero::get(getType()));
2850 if (AllSame && isa<UndefValue>(ToC)) {
2851 replaceUsesOfWithOnConstantImpl(UndefValue::get(getType()));
2855 // Check for any other type of constant-folding.
2856 if (Constant *C = getImpl(getType(), Values)) {
2857 replaceUsesOfWithOnConstantImpl(C);
2861 // Update to the new value.
2862 if (Constant *C = getContext().pImpl->ArrayConstants.replaceOperandsInPlace(
2863 Values, this, From, ToC, NumUpdated, U - OperandList))
2864 replaceUsesOfWithOnConstantImpl(C);
2867 void ConstantStruct::replaceUsesOfWithOnConstant(Value *From, Value *To,
2869 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2870 Constant *ToC = cast<Constant>(To);
2872 unsigned OperandToUpdate = U-OperandList;
2873 assert(getOperand(OperandToUpdate) == From && "ReplaceAllUsesWith broken!");
2875 SmallVector<Constant*, 8> Values;
2876 Values.reserve(getNumOperands()); // Build replacement struct.
2878 // Fill values with the modified operands of the constant struct. Also,
2879 // compute whether this turns into an all-zeros struct.
2880 bool isAllZeros = false;
2881 bool isAllUndef = false;
2882 if (ToC->isNullValue()) {
2884 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2885 Constant *Val = cast<Constant>(O->get());
2886 Values.push_back(Val);
2887 if (isAllZeros) isAllZeros = Val->isNullValue();
2889 } else if (isa<UndefValue>(ToC)) {
2891 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2892 Constant *Val = cast<Constant>(O->get());
2893 Values.push_back(Val);
2894 if (isAllUndef) isAllUndef = isa<UndefValue>(Val);
2897 for (Use *O = OperandList, *E = OperandList + getNumOperands(); O != E; ++O)
2898 Values.push_back(cast<Constant>(O->get()));
2900 Values[OperandToUpdate] = ToC;
2903 replaceUsesOfWithOnConstantImpl(ConstantAggregateZero::get(getType()));
2907 replaceUsesOfWithOnConstantImpl(UndefValue::get(getType()));
2911 // Update to the new value.
2912 if (Constant *C = getContext().pImpl->StructConstants.replaceOperandsInPlace(
2913 Values, this, From, ToC))
2914 replaceUsesOfWithOnConstantImpl(C);
2917 void ConstantVector::replaceUsesOfWithOnConstant(Value *From, Value *To,
2919 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2920 Constant *ToC = cast<Constant>(To);
2922 SmallVector<Constant*, 8> Values;
2923 Values.reserve(getNumOperands()); // Build replacement array...
2924 unsigned NumUpdated = 0;
2925 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
2926 Constant *Val = getOperand(i);
2931 Values.push_back(Val);
2934 if (Constant *C = getImpl(Values)) {
2935 replaceUsesOfWithOnConstantImpl(C);
2939 // Update to the new value.
2940 if (Constant *C = getContext().pImpl->VectorConstants.replaceOperandsInPlace(
2941 Values, this, From, ToC, NumUpdated, U - OperandList))
2942 replaceUsesOfWithOnConstantImpl(C);
2945 void ConstantExpr::replaceUsesOfWithOnConstant(Value *From, Value *ToV,
2947 assert(isa<Constant>(ToV) && "Cannot make Constant refer to non-constant!");
2948 Constant *To = cast<Constant>(ToV);
2950 SmallVector<Constant*, 8> NewOps;
2951 unsigned NumUpdated = 0;
2952 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
2953 Constant *Op = getOperand(i);
2958 NewOps.push_back(Op);
2960 assert(NumUpdated && "I didn't contain From!");
2962 if (Constant *C = getWithOperands(NewOps, getType(), true)) {
2963 replaceUsesOfWithOnConstantImpl(C);
2967 // Update to the new value.
2968 if (Constant *C = getContext().pImpl->ExprConstants.replaceOperandsInPlace(
2969 NewOps, this, From, To, NumUpdated, U - OperandList))
2970 replaceUsesOfWithOnConstantImpl(C);
2973 Instruction *ConstantExpr::getAsInstruction() {
2974 SmallVector<Value*,4> ValueOperands;
2975 for (op_iterator I = op_begin(), E = op_end(); I != E; ++I)
2976 ValueOperands.push_back(cast<Value>(I));
2978 ArrayRef<Value*> Ops(ValueOperands);
2980 switch (getOpcode()) {
2981 case Instruction::Trunc:
2982 case Instruction::ZExt:
2983 case Instruction::SExt:
2984 case Instruction::FPTrunc:
2985 case Instruction::FPExt:
2986 case Instruction::UIToFP:
2987 case Instruction::SIToFP:
2988 case Instruction::FPToUI:
2989 case Instruction::FPToSI:
2990 case Instruction::PtrToInt:
2991 case Instruction::IntToPtr:
2992 case Instruction::BitCast:
2993 case Instruction::AddrSpaceCast:
2994 return CastInst::Create((Instruction::CastOps)getOpcode(),
2996 case Instruction::Select:
2997 return SelectInst::Create(Ops[0], Ops[1], Ops[2]);
2998 case Instruction::InsertElement:
2999 return InsertElementInst::Create(Ops[0], Ops[1], Ops[2]);
3000 case Instruction::ExtractElement:
3001 return ExtractElementInst::Create(Ops[0], Ops[1]);
3002 case Instruction::InsertValue:
3003 return InsertValueInst::Create(Ops[0], Ops[1], getIndices());
3004 case Instruction::ExtractValue:
3005 return ExtractValueInst::Create(Ops[0], getIndices());
3006 case Instruction::ShuffleVector:
3007 return new ShuffleVectorInst(Ops[0], Ops[1], Ops[2]);
3009 case Instruction::GetElementPtr:
3010 if (cast<GEPOperator>(this)->isInBounds())
3011 return GetElementPtrInst::CreateInBounds(Ops[0], Ops.slice(1));
3013 return GetElementPtrInst::Create(Ops[0], Ops.slice(1));
3015 case Instruction::ICmp:
3016 case Instruction::FCmp:
3017 return CmpInst::Create((Instruction::OtherOps)getOpcode(),
3018 getPredicate(), Ops[0], Ops[1]);
3021 assert(getNumOperands() == 2 && "Must be binary operator?");
3022 BinaryOperator *BO =
3023 BinaryOperator::Create((Instruction::BinaryOps)getOpcode(),
3025 if (isa<OverflowingBinaryOperator>(BO)) {
3026 BO->setHasNoUnsignedWrap(SubclassOptionalData &
3027 OverflowingBinaryOperator::NoUnsignedWrap);
3028 BO->setHasNoSignedWrap(SubclassOptionalData &
3029 OverflowingBinaryOperator::NoSignedWrap);
3031 if (isa<PossiblyExactOperator>(BO))
3032 BO->setIsExact(SubclassOptionalData & PossiblyExactOperator::IsExact);