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!");
1219 // If no operands changed return self.
1220 if (Ty == getType() && std::equal(Ops.begin(), Ops.end(), op_begin()))
1221 return const_cast<ConstantExpr*>(this);
1223 Type *OnlyIfReducedTy = OnlyIfReduced ? Ty : nullptr;
1224 switch (getOpcode()) {
1225 case Instruction::Trunc:
1226 case Instruction::ZExt:
1227 case Instruction::SExt:
1228 case Instruction::FPTrunc:
1229 case Instruction::FPExt:
1230 case Instruction::UIToFP:
1231 case Instruction::SIToFP:
1232 case Instruction::FPToUI:
1233 case Instruction::FPToSI:
1234 case Instruction::PtrToInt:
1235 case Instruction::IntToPtr:
1236 case Instruction::BitCast:
1237 case Instruction::AddrSpaceCast:
1238 return ConstantExpr::getCast(getOpcode(), Ops[0], Ty, OnlyIfReduced);
1239 case Instruction::Select:
1240 return ConstantExpr::getSelect(Ops[0], Ops[1], Ops[2], OnlyIfReducedTy);
1241 case Instruction::InsertElement:
1242 return ConstantExpr::getInsertElement(Ops[0], Ops[1], Ops[2],
1244 case Instruction::ExtractElement:
1245 return ConstantExpr::getExtractElement(Ops[0], Ops[1], OnlyIfReducedTy);
1246 case Instruction::InsertValue:
1247 return ConstantExpr::getInsertValue(Ops[0], Ops[1], getIndices(),
1249 case Instruction::ExtractValue:
1250 return ConstantExpr::getExtractValue(Ops[0], getIndices(), OnlyIfReducedTy);
1251 case Instruction::ShuffleVector:
1252 return ConstantExpr::getShuffleVector(Ops[0], Ops[1], Ops[2],
1254 case Instruction::GetElementPtr:
1255 return ConstantExpr::getGetElementPtr(Ops[0], Ops.slice(1),
1256 cast<GEPOperator>(this)->isInBounds(),
1258 case Instruction::ICmp:
1259 case Instruction::FCmp:
1260 return ConstantExpr::getCompare(getPredicate(), Ops[0], Ops[1],
1263 assert(getNumOperands() == 2 && "Must be binary operator?");
1264 return ConstantExpr::get(getOpcode(), Ops[0], Ops[1], SubclassOptionalData,
1270 //===----------------------------------------------------------------------===//
1271 // isValueValidForType implementations
1273 bool ConstantInt::isValueValidForType(Type *Ty, uint64_t Val) {
1274 unsigned NumBits = Ty->getIntegerBitWidth(); // assert okay
1275 if (Ty->isIntegerTy(1))
1276 return Val == 0 || Val == 1;
1278 return true; // always true, has to fit in largest type
1279 uint64_t Max = (1ll << NumBits) - 1;
1283 bool ConstantInt::isValueValidForType(Type *Ty, int64_t Val) {
1284 unsigned NumBits = Ty->getIntegerBitWidth();
1285 if (Ty->isIntegerTy(1))
1286 return Val == 0 || Val == 1 || Val == -1;
1288 return true; // always true, has to fit in largest type
1289 int64_t Min = -(1ll << (NumBits-1));
1290 int64_t Max = (1ll << (NumBits-1)) - 1;
1291 return (Val >= Min && Val <= Max);
1294 bool ConstantFP::isValueValidForType(Type *Ty, const APFloat& Val) {
1295 // convert modifies in place, so make a copy.
1296 APFloat Val2 = APFloat(Val);
1298 switch (Ty->getTypeID()) {
1300 return false; // These can't be represented as floating point!
1302 // FIXME rounding mode needs to be more flexible
1303 case Type::HalfTyID: {
1304 if (&Val2.getSemantics() == &APFloat::IEEEhalf)
1306 Val2.convert(APFloat::IEEEhalf, APFloat::rmNearestTiesToEven, &losesInfo);
1309 case Type::FloatTyID: {
1310 if (&Val2.getSemantics() == &APFloat::IEEEsingle)
1312 Val2.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, &losesInfo);
1315 case Type::DoubleTyID: {
1316 if (&Val2.getSemantics() == &APFloat::IEEEhalf ||
1317 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1318 &Val2.getSemantics() == &APFloat::IEEEdouble)
1320 Val2.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &losesInfo);
1323 case Type::X86_FP80TyID:
1324 return &Val2.getSemantics() == &APFloat::IEEEhalf ||
1325 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1326 &Val2.getSemantics() == &APFloat::IEEEdouble ||
1327 &Val2.getSemantics() == &APFloat::x87DoubleExtended;
1328 case Type::FP128TyID:
1329 return &Val2.getSemantics() == &APFloat::IEEEhalf ||
1330 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1331 &Val2.getSemantics() == &APFloat::IEEEdouble ||
1332 &Val2.getSemantics() == &APFloat::IEEEquad;
1333 case Type::PPC_FP128TyID:
1334 return &Val2.getSemantics() == &APFloat::IEEEhalf ||
1335 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1336 &Val2.getSemantics() == &APFloat::IEEEdouble ||
1337 &Val2.getSemantics() == &APFloat::PPCDoubleDouble;
1342 //===----------------------------------------------------------------------===//
1343 // Factory Function Implementation
1345 ConstantAggregateZero *ConstantAggregateZero::get(Type *Ty) {
1346 assert((Ty->isStructTy() || Ty->isArrayTy() || Ty->isVectorTy()) &&
1347 "Cannot create an aggregate zero of non-aggregate type!");
1349 ConstantAggregateZero *&Entry = Ty->getContext().pImpl->CAZConstants[Ty];
1351 Entry = new ConstantAggregateZero(Ty);
1356 /// destroyConstant - Remove the constant from the constant table.
1358 void ConstantAggregateZero::destroyConstant() {
1359 getContext().pImpl->CAZConstants.erase(getType());
1360 destroyConstantImpl();
1363 /// destroyConstant - Remove the constant from the constant table...
1365 void ConstantArray::destroyConstant() {
1366 getType()->getContext().pImpl->ArrayConstants.remove(this);
1367 destroyConstantImpl();
1371 //---- ConstantStruct::get() implementation...
1374 // destroyConstant - Remove the constant from the constant table...
1376 void ConstantStruct::destroyConstant() {
1377 getType()->getContext().pImpl->StructConstants.remove(this);
1378 destroyConstantImpl();
1381 // destroyConstant - Remove the constant from the constant table...
1383 void ConstantVector::destroyConstant() {
1384 getType()->getContext().pImpl->VectorConstants.remove(this);
1385 destroyConstantImpl();
1388 /// getSplatValue - If this is a splat vector constant, meaning that all of
1389 /// the elements have the same value, return that value. Otherwise return 0.
1390 Constant *Constant::getSplatValue() const {
1391 assert(this->getType()->isVectorTy() && "Only valid for vectors!");
1392 if (isa<ConstantAggregateZero>(this))
1393 return getNullValue(this->getType()->getVectorElementType());
1394 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
1395 return CV->getSplatValue();
1396 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
1397 return CV->getSplatValue();
1401 /// getSplatValue - If this is a splat constant, where all of the
1402 /// elements have the same value, return that value. Otherwise return null.
1403 Constant *ConstantVector::getSplatValue() const {
1404 // Check out first element.
1405 Constant *Elt = getOperand(0);
1406 // Then make sure all remaining elements point to the same value.
1407 for (unsigned I = 1, E = getNumOperands(); I < E; ++I)
1408 if (getOperand(I) != Elt)
1413 /// If C is a constant integer then return its value, otherwise C must be a
1414 /// vector of constant integers, all equal, and the common value is returned.
1415 const APInt &Constant::getUniqueInteger() const {
1416 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
1417 return CI->getValue();
1418 assert(this->getSplatValue() && "Doesn't contain a unique integer!");
1419 const Constant *C = this->getAggregateElement(0U);
1420 assert(C && isa<ConstantInt>(C) && "Not a vector of numbers!");
1421 return cast<ConstantInt>(C)->getValue();
1425 //---- ConstantPointerNull::get() implementation.
1428 ConstantPointerNull *ConstantPointerNull::get(PointerType *Ty) {
1429 ConstantPointerNull *&Entry = Ty->getContext().pImpl->CPNConstants[Ty];
1431 Entry = new ConstantPointerNull(Ty);
1436 // destroyConstant - Remove the constant from the constant table...
1438 void ConstantPointerNull::destroyConstant() {
1439 getContext().pImpl->CPNConstants.erase(getType());
1440 // Free the constant and any dangling references to it.
1441 destroyConstantImpl();
1445 //---- UndefValue::get() implementation.
1448 UndefValue *UndefValue::get(Type *Ty) {
1449 UndefValue *&Entry = Ty->getContext().pImpl->UVConstants[Ty];
1451 Entry = new UndefValue(Ty);
1456 // destroyConstant - Remove the constant from the constant table.
1458 void UndefValue::destroyConstant() {
1459 // Free the constant and any dangling references to it.
1460 getContext().pImpl->UVConstants.erase(getType());
1461 destroyConstantImpl();
1464 //---- BlockAddress::get() implementation.
1467 BlockAddress *BlockAddress::get(BasicBlock *BB) {
1468 assert(BB->getParent() && "Block must have a parent");
1469 return get(BB->getParent(), BB);
1472 BlockAddress *BlockAddress::get(Function *F, BasicBlock *BB) {
1474 F->getContext().pImpl->BlockAddresses[std::make_pair(F, BB)];
1476 BA = new BlockAddress(F, BB);
1478 assert(BA->getFunction() == F && "Basic block moved between functions");
1482 BlockAddress::BlockAddress(Function *F, BasicBlock *BB)
1483 : Constant(Type::getInt8PtrTy(F->getContext()), Value::BlockAddressVal,
1487 BB->AdjustBlockAddressRefCount(1);
1490 BlockAddress *BlockAddress::lookup(const BasicBlock *BB) {
1491 if (!BB->hasAddressTaken())
1494 const Function *F = BB->getParent();
1495 assert(F && "Block must have a parent");
1497 F->getContext().pImpl->BlockAddresses.lookup(std::make_pair(F, BB));
1498 assert(BA && "Refcount and block address map disagree!");
1502 // destroyConstant - Remove the constant from the constant table.
1504 void BlockAddress::destroyConstant() {
1505 getFunction()->getType()->getContext().pImpl
1506 ->BlockAddresses.erase(std::make_pair(getFunction(), getBasicBlock()));
1507 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1508 destroyConstantImpl();
1511 void BlockAddress::replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) {
1512 // This could be replacing either the Basic Block or the Function. In either
1513 // case, we have to remove the map entry.
1514 Function *NewF = getFunction();
1515 BasicBlock *NewBB = getBasicBlock();
1518 NewF = cast<Function>(To->stripPointerCasts());
1520 NewBB = cast<BasicBlock>(To);
1522 // See if the 'new' entry already exists, if not, just update this in place
1523 // and return early.
1524 BlockAddress *&NewBA =
1525 getContext().pImpl->BlockAddresses[std::make_pair(NewF, NewBB)];
1527 replaceUsesOfWithOnConstantImpl(NewBA);
1531 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1533 // Remove the old entry, this can't cause the map to rehash (just a
1534 // tombstone will get added).
1535 getContext().pImpl->BlockAddresses.erase(std::make_pair(getFunction(),
1538 setOperand(0, NewF);
1539 setOperand(1, NewBB);
1540 getBasicBlock()->AdjustBlockAddressRefCount(1);
1543 //---- ConstantExpr::get() implementations.
1546 /// This is a utility function to handle folding of casts and lookup of the
1547 /// cast in the ExprConstants map. It is used by the various get* methods below.
1548 static Constant *getFoldedCast(Instruction::CastOps opc, Constant *C, Type *Ty,
1549 bool OnlyIfReduced = false) {
1550 assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
1551 // Fold a few common cases
1552 if (Constant *FC = ConstantFoldCastInstruction(opc, C, Ty))
1558 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
1560 // Look up the constant in the table first to ensure uniqueness.
1561 ConstantExprKeyType Key(opc, C);
1563 return pImpl->ExprConstants.getOrCreate(Ty, Key);
1566 Constant *ConstantExpr::getCast(unsigned oc, Constant *C, Type *Ty,
1567 bool OnlyIfReduced) {
1568 Instruction::CastOps opc = Instruction::CastOps(oc);
1569 assert(Instruction::isCast(opc) && "opcode out of range");
1570 assert(C && Ty && "Null arguments to getCast");
1571 assert(CastInst::castIsValid(opc, C, Ty) && "Invalid constantexpr cast!");
1575 llvm_unreachable("Invalid cast opcode");
1576 case Instruction::Trunc:
1577 return getTrunc(C, Ty, OnlyIfReduced);
1578 case Instruction::ZExt:
1579 return getZExt(C, Ty, OnlyIfReduced);
1580 case Instruction::SExt:
1581 return getSExt(C, Ty, OnlyIfReduced);
1582 case Instruction::FPTrunc:
1583 return getFPTrunc(C, Ty, OnlyIfReduced);
1584 case Instruction::FPExt:
1585 return getFPExtend(C, Ty, OnlyIfReduced);
1586 case Instruction::UIToFP:
1587 return getUIToFP(C, Ty, OnlyIfReduced);
1588 case Instruction::SIToFP:
1589 return getSIToFP(C, Ty, OnlyIfReduced);
1590 case Instruction::FPToUI:
1591 return getFPToUI(C, Ty, OnlyIfReduced);
1592 case Instruction::FPToSI:
1593 return getFPToSI(C, Ty, OnlyIfReduced);
1594 case Instruction::PtrToInt:
1595 return getPtrToInt(C, Ty, OnlyIfReduced);
1596 case Instruction::IntToPtr:
1597 return getIntToPtr(C, Ty, OnlyIfReduced);
1598 case Instruction::BitCast:
1599 return getBitCast(C, Ty, OnlyIfReduced);
1600 case Instruction::AddrSpaceCast:
1601 return getAddrSpaceCast(C, Ty, OnlyIfReduced);
1605 Constant *ConstantExpr::getZExtOrBitCast(Constant *C, Type *Ty) {
1606 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1607 return getBitCast(C, Ty);
1608 return getZExt(C, Ty);
1611 Constant *ConstantExpr::getSExtOrBitCast(Constant *C, Type *Ty) {
1612 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1613 return getBitCast(C, Ty);
1614 return getSExt(C, Ty);
1617 Constant *ConstantExpr::getTruncOrBitCast(Constant *C, Type *Ty) {
1618 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1619 return getBitCast(C, Ty);
1620 return getTrunc(C, Ty);
1623 Constant *ConstantExpr::getPointerCast(Constant *S, Type *Ty) {
1624 assert(S->getType()->isPtrOrPtrVectorTy() && "Invalid cast");
1625 assert((Ty->isIntOrIntVectorTy() || Ty->isPtrOrPtrVectorTy()) &&
1628 if (Ty->isIntOrIntVectorTy())
1629 return getPtrToInt(S, Ty);
1631 unsigned SrcAS = S->getType()->getPointerAddressSpace();
1632 if (Ty->isPtrOrPtrVectorTy() && SrcAS != Ty->getPointerAddressSpace())
1633 return getAddrSpaceCast(S, Ty);
1635 return getBitCast(S, Ty);
1638 Constant *ConstantExpr::getPointerBitCastOrAddrSpaceCast(Constant *S,
1640 assert(S->getType()->isPtrOrPtrVectorTy() && "Invalid cast");
1641 assert(Ty->isPtrOrPtrVectorTy() && "Invalid cast");
1643 if (S->getType()->getPointerAddressSpace() != Ty->getPointerAddressSpace())
1644 return getAddrSpaceCast(S, Ty);
1646 return getBitCast(S, Ty);
1649 Constant *ConstantExpr::getIntegerCast(Constant *C, Type *Ty,
1651 assert(C->getType()->isIntOrIntVectorTy() &&
1652 Ty->isIntOrIntVectorTy() && "Invalid cast");
1653 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1654 unsigned DstBits = Ty->getScalarSizeInBits();
1655 Instruction::CastOps opcode =
1656 (SrcBits == DstBits ? Instruction::BitCast :
1657 (SrcBits > DstBits ? Instruction::Trunc :
1658 (isSigned ? Instruction::SExt : Instruction::ZExt)));
1659 return getCast(opcode, C, Ty);
1662 Constant *ConstantExpr::getFPCast(Constant *C, Type *Ty) {
1663 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1665 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1666 unsigned DstBits = Ty->getScalarSizeInBits();
1667 if (SrcBits == DstBits)
1668 return C; // Avoid a useless cast
1669 Instruction::CastOps opcode =
1670 (SrcBits > DstBits ? Instruction::FPTrunc : Instruction::FPExt);
1671 return getCast(opcode, C, Ty);
1674 Constant *ConstantExpr::getTrunc(Constant *C, Type *Ty, bool OnlyIfReduced) {
1676 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1677 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1679 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1680 assert(C->getType()->isIntOrIntVectorTy() && "Trunc operand must be integer");
1681 assert(Ty->isIntOrIntVectorTy() && "Trunc produces only integral");
1682 assert(C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1683 "SrcTy must be larger than DestTy for Trunc!");
1685 return getFoldedCast(Instruction::Trunc, C, Ty, OnlyIfReduced);
1688 Constant *ConstantExpr::getSExt(Constant *C, Type *Ty, bool OnlyIfReduced) {
1690 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1691 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1693 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1694 assert(C->getType()->isIntOrIntVectorTy() && "SExt operand must be integral");
1695 assert(Ty->isIntOrIntVectorTy() && "SExt produces only integer");
1696 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1697 "SrcTy must be smaller than DestTy for SExt!");
1699 return getFoldedCast(Instruction::SExt, C, Ty, OnlyIfReduced);
1702 Constant *ConstantExpr::getZExt(Constant *C, Type *Ty, bool OnlyIfReduced) {
1704 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1705 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1707 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1708 assert(C->getType()->isIntOrIntVectorTy() && "ZEXt operand must be integral");
1709 assert(Ty->isIntOrIntVectorTy() && "ZExt produces only integer");
1710 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1711 "SrcTy must be smaller than DestTy for ZExt!");
1713 return getFoldedCast(Instruction::ZExt, C, Ty, OnlyIfReduced);
1716 Constant *ConstantExpr::getFPTrunc(Constant *C, Type *Ty, bool OnlyIfReduced) {
1718 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1719 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1721 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1722 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1723 C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1724 "This is an illegal floating point truncation!");
1725 return getFoldedCast(Instruction::FPTrunc, C, Ty, OnlyIfReduced);
1728 Constant *ConstantExpr::getFPExtend(Constant *C, Type *Ty, bool OnlyIfReduced) {
1730 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1731 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1733 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1734 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1735 C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1736 "This is an illegal floating point extension!");
1737 return getFoldedCast(Instruction::FPExt, C, Ty, OnlyIfReduced);
1740 Constant *ConstantExpr::getUIToFP(Constant *C, Type *Ty, bool OnlyIfReduced) {
1742 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1743 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1745 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1746 assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1747 "This is an illegal uint to floating point cast!");
1748 return getFoldedCast(Instruction::UIToFP, C, Ty, OnlyIfReduced);
1751 Constant *ConstantExpr::getSIToFP(Constant *C, Type *Ty, bool OnlyIfReduced) {
1753 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1754 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1756 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1757 assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1758 "This is an illegal sint to floating point cast!");
1759 return getFoldedCast(Instruction::SIToFP, C, Ty, OnlyIfReduced);
1762 Constant *ConstantExpr::getFPToUI(Constant *C, Type *Ty, bool OnlyIfReduced) {
1764 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1765 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1767 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1768 assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1769 "This is an illegal floating point to uint cast!");
1770 return getFoldedCast(Instruction::FPToUI, C, Ty, OnlyIfReduced);
1773 Constant *ConstantExpr::getFPToSI(Constant *C, Type *Ty, bool OnlyIfReduced) {
1775 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1776 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1778 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1779 assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1780 "This is an illegal floating point to sint cast!");
1781 return getFoldedCast(Instruction::FPToSI, C, Ty, OnlyIfReduced);
1784 Constant *ConstantExpr::getPtrToInt(Constant *C, Type *DstTy,
1785 bool OnlyIfReduced) {
1786 assert(C->getType()->getScalarType()->isPointerTy() &&
1787 "PtrToInt source must be pointer or pointer vector");
1788 assert(DstTy->getScalarType()->isIntegerTy() &&
1789 "PtrToInt destination must be integer or integer vector");
1790 assert(isa<VectorType>(C->getType()) == isa<VectorType>(DstTy));
1791 if (isa<VectorType>(C->getType()))
1792 assert(C->getType()->getVectorNumElements()==DstTy->getVectorNumElements()&&
1793 "Invalid cast between a different number of vector elements");
1794 return getFoldedCast(Instruction::PtrToInt, C, DstTy, OnlyIfReduced);
1797 Constant *ConstantExpr::getIntToPtr(Constant *C, Type *DstTy,
1798 bool OnlyIfReduced) {
1799 assert(C->getType()->getScalarType()->isIntegerTy() &&
1800 "IntToPtr source must be integer or integer vector");
1801 assert(DstTy->getScalarType()->isPointerTy() &&
1802 "IntToPtr destination must be a pointer or pointer vector");
1803 assert(isa<VectorType>(C->getType()) == isa<VectorType>(DstTy));
1804 if (isa<VectorType>(C->getType()))
1805 assert(C->getType()->getVectorNumElements()==DstTy->getVectorNumElements()&&
1806 "Invalid cast between a different number of vector elements");
1807 return getFoldedCast(Instruction::IntToPtr, C, DstTy, OnlyIfReduced);
1810 Constant *ConstantExpr::getBitCast(Constant *C, Type *DstTy,
1811 bool OnlyIfReduced) {
1812 assert(CastInst::castIsValid(Instruction::BitCast, C, DstTy) &&
1813 "Invalid constantexpr bitcast!");
1815 // It is common to ask for a bitcast of a value to its own type, handle this
1817 if (C->getType() == DstTy) return C;
1819 return getFoldedCast(Instruction::BitCast, C, DstTy, OnlyIfReduced);
1822 Constant *ConstantExpr::getAddrSpaceCast(Constant *C, Type *DstTy,
1823 bool OnlyIfReduced) {
1824 assert(CastInst::castIsValid(Instruction::AddrSpaceCast, C, DstTy) &&
1825 "Invalid constantexpr addrspacecast!");
1827 // Canonicalize addrspacecasts between different pointer types by first
1828 // bitcasting the pointer type and then converting the address space.
1829 PointerType *SrcScalarTy = cast<PointerType>(C->getType()->getScalarType());
1830 PointerType *DstScalarTy = cast<PointerType>(DstTy->getScalarType());
1831 Type *DstElemTy = DstScalarTy->getElementType();
1832 if (SrcScalarTy->getElementType() != DstElemTy) {
1833 Type *MidTy = PointerType::get(DstElemTy, SrcScalarTy->getAddressSpace());
1834 if (VectorType *VT = dyn_cast<VectorType>(DstTy)) {
1835 // Handle vectors of pointers.
1836 MidTy = VectorType::get(MidTy, VT->getNumElements());
1838 C = getBitCast(C, MidTy);
1840 return getFoldedCast(Instruction::AddrSpaceCast, C, DstTy, OnlyIfReduced);
1843 Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2,
1844 unsigned Flags, Type *OnlyIfReducedTy) {
1845 // Check the operands for consistency first.
1846 assert(Opcode >= Instruction::BinaryOpsBegin &&
1847 Opcode < Instruction::BinaryOpsEnd &&
1848 "Invalid opcode in binary constant expression");
1849 assert(C1->getType() == C2->getType() &&
1850 "Operand types in binary constant expression should match");
1854 case Instruction::Add:
1855 case Instruction::Sub:
1856 case Instruction::Mul:
1857 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1858 assert(C1->getType()->isIntOrIntVectorTy() &&
1859 "Tried to create an integer operation on a non-integer type!");
1861 case Instruction::FAdd:
1862 case Instruction::FSub:
1863 case Instruction::FMul:
1864 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1865 assert(C1->getType()->isFPOrFPVectorTy() &&
1866 "Tried to create a floating-point operation on a "
1867 "non-floating-point type!");
1869 case Instruction::UDiv:
1870 case Instruction::SDiv:
1871 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1872 assert(C1->getType()->isIntOrIntVectorTy() &&
1873 "Tried to create an arithmetic operation on a non-arithmetic type!");
1875 case Instruction::FDiv:
1876 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1877 assert(C1->getType()->isFPOrFPVectorTy() &&
1878 "Tried to create an arithmetic operation on a non-arithmetic type!");
1880 case Instruction::URem:
1881 case Instruction::SRem:
1882 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1883 assert(C1->getType()->isIntOrIntVectorTy() &&
1884 "Tried to create an arithmetic operation on a non-arithmetic type!");
1886 case Instruction::FRem:
1887 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1888 assert(C1->getType()->isFPOrFPVectorTy() &&
1889 "Tried to create an arithmetic operation on a non-arithmetic type!");
1891 case Instruction::And:
1892 case Instruction::Or:
1893 case Instruction::Xor:
1894 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1895 assert(C1->getType()->isIntOrIntVectorTy() &&
1896 "Tried to create a logical operation on a non-integral type!");
1898 case Instruction::Shl:
1899 case Instruction::LShr:
1900 case Instruction::AShr:
1901 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1902 assert(C1->getType()->isIntOrIntVectorTy() &&
1903 "Tried to create a shift operation on a non-integer type!");
1910 if (Constant *FC = ConstantFoldBinaryInstruction(Opcode, C1, C2))
1911 return FC; // Fold a few common cases.
1913 if (OnlyIfReducedTy == C1->getType())
1916 Constant *ArgVec[] = { C1, C2 };
1917 ConstantExprKeyType Key(Opcode, ArgVec, 0, Flags);
1919 LLVMContextImpl *pImpl = C1->getContext().pImpl;
1920 return pImpl->ExprConstants.getOrCreate(C1->getType(), Key);
1923 Constant *ConstantExpr::getSizeOf(Type* Ty) {
1924 // sizeof is implemented as: (i64) gep (Ty*)null, 1
1925 // Note that a non-inbounds gep is used, as null isn't within any object.
1926 Constant *GEPIdx = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1927 Constant *GEP = getGetElementPtr(
1928 Constant::getNullValue(PointerType::getUnqual(Ty)), GEPIdx);
1929 return getPtrToInt(GEP,
1930 Type::getInt64Ty(Ty->getContext()));
1933 Constant *ConstantExpr::getAlignOf(Type* Ty) {
1934 // alignof is implemented as: (i64) gep ({i1,Ty}*)null, 0, 1
1935 // Note that a non-inbounds gep is used, as null isn't within any object.
1937 StructType::get(Type::getInt1Ty(Ty->getContext()), Ty, nullptr);
1938 Constant *NullPtr = Constant::getNullValue(AligningTy->getPointerTo(0));
1939 Constant *Zero = ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0);
1940 Constant *One = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1941 Constant *Indices[2] = { Zero, One };
1942 Constant *GEP = getGetElementPtr(NullPtr, Indices);
1943 return getPtrToInt(GEP,
1944 Type::getInt64Ty(Ty->getContext()));
1947 Constant *ConstantExpr::getOffsetOf(StructType* STy, unsigned FieldNo) {
1948 return getOffsetOf(STy, ConstantInt::get(Type::getInt32Ty(STy->getContext()),
1952 Constant *ConstantExpr::getOffsetOf(Type* Ty, Constant *FieldNo) {
1953 // offsetof is implemented as: (i64) gep (Ty*)null, 0, FieldNo
1954 // Note that a non-inbounds gep is used, as null isn't within any object.
1955 Constant *GEPIdx[] = {
1956 ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0),
1959 Constant *GEP = getGetElementPtr(
1960 Constant::getNullValue(PointerType::getUnqual(Ty)), GEPIdx);
1961 return getPtrToInt(GEP,
1962 Type::getInt64Ty(Ty->getContext()));
1965 Constant *ConstantExpr::getCompare(unsigned short Predicate, Constant *C1,
1966 Constant *C2, bool OnlyIfReduced) {
1967 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1969 switch (Predicate) {
1970 default: llvm_unreachable("Invalid CmpInst predicate");
1971 case CmpInst::FCMP_FALSE: case CmpInst::FCMP_OEQ: case CmpInst::FCMP_OGT:
1972 case CmpInst::FCMP_OGE: case CmpInst::FCMP_OLT: case CmpInst::FCMP_OLE:
1973 case CmpInst::FCMP_ONE: case CmpInst::FCMP_ORD: case CmpInst::FCMP_UNO:
1974 case CmpInst::FCMP_UEQ: case CmpInst::FCMP_UGT: case CmpInst::FCMP_UGE:
1975 case CmpInst::FCMP_ULT: case CmpInst::FCMP_ULE: case CmpInst::FCMP_UNE:
1976 case CmpInst::FCMP_TRUE:
1977 return getFCmp(Predicate, C1, C2, OnlyIfReduced);
1979 case CmpInst::ICMP_EQ: case CmpInst::ICMP_NE: case CmpInst::ICMP_UGT:
1980 case CmpInst::ICMP_UGE: case CmpInst::ICMP_ULT: case CmpInst::ICMP_ULE:
1981 case CmpInst::ICMP_SGT: case CmpInst::ICMP_SGE: case CmpInst::ICMP_SLT:
1982 case CmpInst::ICMP_SLE:
1983 return getICmp(Predicate, C1, C2, OnlyIfReduced);
1987 Constant *ConstantExpr::getSelect(Constant *C, Constant *V1, Constant *V2,
1988 Type *OnlyIfReducedTy) {
1989 assert(!SelectInst::areInvalidOperands(C, V1, V2)&&"Invalid select operands");
1991 if (Constant *SC = ConstantFoldSelectInstruction(C, V1, V2))
1992 return SC; // Fold common cases
1994 if (OnlyIfReducedTy == V1->getType())
1997 Constant *ArgVec[] = { C, V1, V2 };
1998 ConstantExprKeyType Key(Instruction::Select, ArgVec);
2000 LLVMContextImpl *pImpl = C->getContext().pImpl;
2001 return pImpl->ExprConstants.getOrCreate(V1->getType(), Key);
2004 Constant *ConstantExpr::getGetElementPtr(Constant *C, ArrayRef<Value *> Idxs,
2005 bool InBounds, Type *OnlyIfReducedTy) {
2006 assert(C->getType()->isPtrOrPtrVectorTy() &&
2007 "Non-pointer type for constant GetElementPtr expression");
2009 if (Constant *FC = ConstantFoldGetElementPtr(C, InBounds, Idxs))
2010 return FC; // Fold a few common cases.
2012 // Get the result type of the getelementptr!
2013 Type *Ty = GetElementPtrInst::getIndexedType(C->getType(), Idxs);
2014 assert(Ty && "GEP indices invalid!");
2015 unsigned AS = C->getType()->getPointerAddressSpace();
2016 Type *ReqTy = Ty->getPointerTo(AS);
2017 if (VectorType *VecTy = dyn_cast<VectorType>(C->getType()))
2018 ReqTy = VectorType::get(ReqTy, VecTy->getNumElements());
2020 if (OnlyIfReducedTy == ReqTy)
2023 // Look up the constant in the table first to ensure uniqueness
2024 std::vector<Constant*> ArgVec;
2025 ArgVec.reserve(1 + Idxs.size());
2026 ArgVec.push_back(C);
2027 for (unsigned i = 0, e = Idxs.size(); i != e; ++i) {
2028 assert(Idxs[i]->getType()->isVectorTy() == ReqTy->isVectorTy() &&
2029 "getelementptr index type missmatch");
2030 assert((!Idxs[i]->getType()->isVectorTy() ||
2031 ReqTy->getVectorNumElements() ==
2032 Idxs[i]->getType()->getVectorNumElements()) &&
2033 "getelementptr index type missmatch");
2034 ArgVec.push_back(cast<Constant>(Idxs[i]));
2036 const ConstantExprKeyType Key(Instruction::GetElementPtr, ArgVec, 0,
2037 InBounds ? GEPOperator::IsInBounds : 0);
2039 LLVMContextImpl *pImpl = C->getContext().pImpl;
2040 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2043 Constant *ConstantExpr::getICmp(unsigned short pred, Constant *LHS,
2044 Constant *RHS, bool OnlyIfReduced) {
2045 assert(LHS->getType() == RHS->getType());
2046 assert(pred >= ICmpInst::FIRST_ICMP_PREDICATE &&
2047 pred <= ICmpInst::LAST_ICMP_PREDICATE && "Invalid ICmp Predicate");
2049 if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
2050 return FC; // Fold a few common cases...
2055 // Look up the constant in the table first to ensure uniqueness
2056 Constant *ArgVec[] = { LHS, RHS };
2057 // Get the key type with both the opcode and predicate
2058 const ConstantExprKeyType Key(Instruction::ICmp, ArgVec, pred);
2060 Type *ResultTy = Type::getInt1Ty(LHS->getContext());
2061 if (VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
2062 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
2064 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
2065 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
2068 Constant *ConstantExpr::getFCmp(unsigned short pred, Constant *LHS,
2069 Constant *RHS, bool OnlyIfReduced) {
2070 assert(LHS->getType() == RHS->getType());
2071 assert(pred <= FCmpInst::LAST_FCMP_PREDICATE && "Invalid FCmp Predicate");
2073 if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
2074 return FC; // Fold a few common cases...
2079 // Look up the constant in the table first to ensure uniqueness
2080 Constant *ArgVec[] = { LHS, RHS };
2081 // Get the key type with both the opcode and predicate
2082 const ConstantExprKeyType Key(Instruction::FCmp, ArgVec, pred);
2084 Type *ResultTy = Type::getInt1Ty(LHS->getContext());
2085 if (VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
2086 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
2088 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
2089 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
2092 Constant *ConstantExpr::getExtractElement(Constant *Val, Constant *Idx,
2093 Type *OnlyIfReducedTy) {
2094 assert(Val->getType()->isVectorTy() &&
2095 "Tried to create extractelement operation on non-vector type!");
2096 assert(Idx->getType()->isIntegerTy() &&
2097 "Extractelement index must be an integer type!");
2099 if (Constant *FC = ConstantFoldExtractElementInstruction(Val, Idx))
2100 return FC; // Fold a few common cases.
2102 Type *ReqTy = Val->getType()->getVectorElementType();
2103 if (OnlyIfReducedTy == ReqTy)
2106 // Look up the constant in the table first to ensure uniqueness
2107 Constant *ArgVec[] = { Val, Idx };
2108 const ConstantExprKeyType Key(Instruction::ExtractElement, ArgVec);
2110 LLVMContextImpl *pImpl = Val->getContext().pImpl;
2111 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2114 Constant *ConstantExpr::getInsertElement(Constant *Val, Constant *Elt,
2115 Constant *Idx, Type *OnlyIfReducedTy) {
2116 assert(Val->getType()->isVectorTy() &&
2117 "Tried to create insertelement operation on non-vector type!");
2118 assert(Elt->getType() == Val->getType()->getVectorElementType() &&
2119 "Insertelement types must match!");
2120 assert(Idx->getType()->isIntegerTy() &&
2121 "Insertelement index must be i32 type!");
2123 if (Constant *FC = ConstantFoldInsertElementInstruction(Val, Elt, Idx))
2124 return FC; // Fold a few common cases.
2126 if (OnlyIfReducedTy == Val->getType())
2129 // Look up the constant in the table first to ensure uniqueness
2130 Constant *ArgVec[] = { Val, Elt, Idx };
2131 const ConstantExprKeyType Key(Instruction::InsertElement, ArgVec);
2133 LLVMContextImpl *pImpl = Val->getContext().pImpl;
2134 return pImpl->ExprConstants.getOrCreate(Val->getType(), Key);
2137 Constant *ConstantExpr::getShuffleVector(Constant *V1, Constant *V2,
2138 Constant *Mask, Type *OnlyIfReducedTy) {
2139 assert(ShuffleVectorInst::isValidOperands(V1, V2, Mask) &&
2140 "Invalid shuffle vector constant expr operands!");
2142 if (Constant *FC = ConstantFoldShuffleVectorInstruction(V1, V2, Mask))
2143 return FC; // Fold a few common cases.
2145 unsigned NElts = Mask->getType()->getVectorNumElements();
2146 Type *EltTy = V1->getType()->getVectorElementType();
2147 Type *ShufTy = VectorType::get(EltTy, NElts);
2149 if (OnlyIfReducedTy == ShufTy)
2152 // Look up the constant in the table first to ensure uniqueness
2153 Constant *ArgVec[] = { V1, V2, Mask };
2154 const ConstantExprKeyType Key(Instruction::ShuffleVector, ArgVec);
2156 LLVMContextImpl *pImpl = ShufTy->getContext().pImpl;
2157 return pImpl->ExprConstants.getOrCreate(ShufTy, Key);
2160 Constant *ConstantExpr::getInsertValue(Constant *Agg, Constant *Val,
2161 ArrayRef<unsigned> Idxs,
2162 Type *OnlyIfReducedTy) {
2163 assert(Agg->getType()->isFirstClassType() &&
2164 "Non-first-class type for constant insertvalue expression");
2166 assert(ExtractValueInst::getIndexedType(Agg->getType(),
2167 Idxs) == Val->getType() &&
2168 "insertvalue indices invalid!");
2169 Type *ReqTy = Val->getType();
2171 if (Constant *FC = ConstantFoldInsertValueInstruction(Agg, Val, Idxs))
2174 if (OnlyIfReducedTy == ReqTy)
2177 Constant *ArgVec[] = { Agg, Val };
2178 const ConstantExprKeyType Key(Instruction::InsertValue, ArgVec, 0, 0, Idxs);
2180 LLVMContextImpl *pImpl = Agg->getContext().pImpl;
2181 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2184 Constant *ConstantExpr::getExtractValue(Constant *Agg, ArrayRef<unsigned> Idxs,
2185 Type *OnlyIfReducedTy) {
2186 assert(Agg->getType()->isFirstClassType() &&
2187 "Tried to create extractelement operation on non-first-class type!");
2189 Type *ReqTy = ExtractValueInst::getIndexedType(Agg->getType(), Idxs);
2191 assert(ReqTy && "extractvalue indices invalid!");
2193 assert(Agg->getType()->isFirstClassType() &&
2194 "Non-first-class type for constant extractvalue expression");
2195 if (Constant *FC = ConstantFoldExtractValueInstruction(Agg, Idxs))
2198 if (OnlyIfReducedTy == ReqTy)
2201 Constant *ArgVec[] = { Agg };
2202 const ConstantExprKeyType Key(Instruction::ExtractValue, ArgVec, 0, 0, Idxs);
2204 LLVMContextImpl *pImpl = Agg->getContext().pImpl;
2205 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2208 Constant *ConstantExpr::getNeg(Constant *C, bool HasNUW, bool HasNSW) {
2209 assert(C->getType()->isIntOrIntVectorTy() &&
2210 "Cannot NEG a nonintegral value!");
2211 return getSub(ConstantFP::getZeroValueForNegation(C->getType()),
2215 Constant *ConstantExpr::getFNeg(Constant *C) {
2216 assert(C->getType()->isFPOrFPVectorTy() &&
2217 "Cannot FNEG a non-floating-point value!");
2218 return getFSub(ConstantFP::getZeroValueForNegation(C->getType()), C);
2221 Constant *ConstantExpr::getNot(Constant *C) {
2222 assert(C->getType()->isIntOrIntVectorTy() &&
2223 "Cannot NOT a nonintegral value!");
2224 return get(Instruction::Xor, C, Constant::getAllOnesValue(C->getType()));
2227 Constant *ConstantExpr::getAdd(Constant *C1, Constant *C2,
2228 bool HasNUW, bool HasNSW) {
2229 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2230 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2231 return get(Instruction::Add, C1, C2, Flags);
2234 Constant *ConstantExpr::getFAdd(Constant *C1, Constant *C2) {
2235 return get(Instruction::FAdd, C1, C2);
2238 Constant *ConstantExpr::getSub(Constant *C1, Constant *C2,
2239 bool HasNUW, bool HasNSW) {
2240 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2241 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2242 return get(Instruction::Sub, C1, C2, Flags);
2245 Constant *ConstantExpr::getFSub(Constant *C1, Constant *C2) {
2246 return get(Instruction::FSub, C1, C2);
2249 Constant *ConstantExpr::getMul(Constant *C1, Constant *C2,
2250 bool HasNUW, bool HasNSW) {
2251 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2252 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2253 return get(Instruction::Mul, C1, C2, Flags);
2256 Constant *ConstantExpr::getFMul(Constant *C1, Constant *C2) {
2257 return get(Instruction::FMul, C1, C2);
2260 Constant *ConstantExpr::getUDiv(Constant *C1, Constant *C2, bool isExact) {
2261 return get(Instruction::UDiv, C1, C2,
2262 isExact ? PossiblyExactOperator::IsExact : 0);
2265 Constant *ConstantExpr::getSDiv(Constant *C1, Constant *C2, bool isExact) {
2266 return get(Instruction::SDiv, C1, C2,
2267 isExact ? PossiblyExactOperator::IsExact : 0);
2270 Constant *ConstantExpr::getFDiv(Constant *C1, Constant *C2) {
2271 return get(Instruction::FDiv, C1, C2);
2274 Constant *ConstantExpr::getURem(Constant *C1, Constant *C2) {
2275 return get(Instruction::URem, C1, C2);
2278 Constant *ConstantExpr::getSRem(Constant *C1, Constant *C2) {
2279 return get(Instruction::SRem, C1, C2);
2282 Constant *ConstantExpr::getFRem(Constant *C1, Constant *C2) {
2283 return get(Instruction::FRem, C1, C2);
2286 Constant *ConstantExpr::getAnd(Constant *C1, Constant *C2) {
2287 return get(Instruction::And, C1, C2);
2290 Constant *ConstantExpr::getOr(Constant *C1, Constant *C2) {
2291 return get(Instruction::Or, C1, C2);
2294 Constant *ConstantExpr::getXor(Constant *C1, Constant *C2) {
2295 return get(Instruction::Xor, C1, C2);
2298 Constant *ConstantExpr::getShl(Constant *C1, Constant *C2,
2299 bool HasNUW, bool HasNSW) {
2300 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2301 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2302 return get(Instruction::Shl, C1, C2, Flags);
2305 Constant *ConstantExpr::getLShr(Constant *C1, Constant *C2, bool isExact) {
2306 return get(Instruction::LShr, C1, C2,
2307 isExact ? PossiblyExactOperator::IsExact : 0);
2310 Constant *ConstantExpr::getAShr(Constant *C1, Constant *C2, bool isExact) {
2311 return get(Instruction::AShr, C1, C2,
2312 isExact ? PossiblyExactOperator::IsExact : 0);
2315 /// getBinOpIdentity - Return the identity for the given binary operation,
2316 /// i.e. a constant C such that X op C = X and C op X = X for every X. It
2317 /// returns null if the operator doesn't have an identity.
2318 Constant *ConstantExpr::getBinOpIdentity(unsigned Opcode, Type *Ty) {
2321 // Doesn't have an identity.
2324 case Instruction::Add:
2325 case Instruction::Or:
2326 case Instruction::Xor:
2327 return Constant::getNullValue(Ty);
2329 case Instruction::Mul:
2330 return ConstantInt::get(Ty, 1);
2332 case Instruction::And:
2333 return Constant::getAllOnesValue(Ty);
2337 /// getBinOpAbsorber - Return the absorbing element for the given binary
2338 /// operation, i.e. a constant C such that X op C = C and C op X = C for
2339 /// every X. For example, this returns zero for integer multiplication.
2340 /// It returns null if the operator doesn't have an absorbing element.
2341 Constant *ConstantExpr::getBinOpAbsorber(unsigned Opcode, Type *Ty) {
2344 // Doesn't have an absorber.
2347 case Instruction::Or:
2348 return Constant::getAllOnesValue(Ty);
2350 case Instruction::And:
2351 case Instruction::Mul:
2352 return Constant::getNullValue(Ty);
2356 // destroyConstant - Remove the constant from the constant table...
2358 void ConstantExpr::destroyConstant() {
2359 getType()->getContext().pImpl->ExprConstants.remove(this);
2360 destroyConstantImpl();
2363 const char *ConstantExpr::getOpcodeName() const {
2364 return Instruction::getOpcodeName(getOpcode());
2369 GetElementPtrConstantExpr::
2370 GetElementPtrConstantExpr(Constant *C, ArrayRef<Constant*> IdxList,
2372 : ConstantExpr(DestTy, Instruction::GetElementPtr,
2373 OperandTraits<GetElementPtrConstantExpr>::op_end(this)
2374 - (IdxList.size()+1), IdxList.size()+1) {
2376 for (unsigned i = 0, E = IdxList.size(); i != E; ++i)
2377 OperandList[i+1] = IdxList[i];
2380 //===----------------------------------------------------------------------===//
2381 // ConstantData* implementations
2383 void ConstantDataArray::anchor() {}
2384 void ConstantDataVector::anchor() {}
2386 /// getElementType - Return the element type of the array/vector.
2387 Type *ConstantDataSequential::getElementType() const {
2388 return getType()->getElementType();
2391 StringRef ConstantDataSequential::getRawDataValues() const {
2392 return StringRef(DataElements, getNumElements()*getElementByteSize());
2395 /// isElementTypeCompatible - Return true if a ConstantDataSequential can be
2396 /// formed with a vector or array of the specified element type.
2397 /// ConstantDataArray only works with normal float and int types that are
2398 /// stored densely in memory, not with things like i42 or x86_f80.
2399 bool ConstantDataSequential::isElementTypeCompatible(const Type *Ty) {
2400 if (Ty->isFloatTy() || Ty->isDoubleTy()) return true;
2401 if (const IntegerType *IT = dyn_cast<IntegerType>(Ty)) {
2402 switch (IT->getBitWidth()) {
2414 /// getNumElements - Return the number of elements in the array or vector.
2415 unsigned ConstantDataSequential::getNumElements() const {
2416 if (ArrayType *AT = dyn_cast<ArrayType>(getType()))
2417 return AT->getNumElements();
2418 return getType()->getVectorNumElements();
2422 /// getElementByteSize - Return the size in bytes of the elements in the data.
2423 uint64_t ConstantDataSequential::getElementByteSize() const {
2424 return getElementType()->getPrimitiveSizeInBits()/8;
2427 /// getElementPointer - Return the start of the specified element.
2428 const char *ConstantDataSequential::getElementPointer(unsigned Elt) const {
2429 assert(Elt < getNumElements() && "Invalid Elt");
2430 return DataElements+Elt*getElementByteSize();
2434 /// isAllZeros - return true if the array is empty or all zeros.
2435 static bool isAllZeros(StringRef Arr) {
2436 for (StringRef::iterator I = Arr.begin(), E = Arr.end(); I != E; ++I)
2442 /// getImpl - This is the underlying implementation of all of the
2443 /// ConstantDataSequential::get methods. They all thunk down to here, providing
2444 /// the correct element type. We take the bytes in as a StringRef because
2445 /// we *want* an underlying "char*" to avoid TBAA type punning violations.
2446 Constant *ConstantDataSequential::getImpl(StringRef Elements, Type *Ty) {
2447 assert(isElementTypeCompatible(Ty->getSequentialElementType()));
2448 // If the elements are all zero or there are no elements, return a CAZ, which
2449 // is more dense and canonical.
2450 if (isAllZeros(Elements))
2451 return ConstantAggregateZero::get(Ty);
2453 // Do a lookup to see if we have already formed one of these.
2456 .pImpl->CDSConstants.insert(std::make_pair(Elements, nullptr))
2459 // The bucket can point to a linked list of different CDS's that have the same
2460 // body but different types. For example, 0,0,0,1 could be a 4 element array
2461 // of i8, or a 1-element array of i32. They'll both end up in the same
2462 /// StringMap bucket, linked up by their Next pointers. Walk the list.
2463 ConstantDataSequential **Entry = &Slot.second;
2464 for (ConstantDataSequential *Node = *Entry; Node;
2465 Entry = &Node->Next, Node = *Entry)
2466 if (Node->getType() == Ty)
2469 // Okay, we didn't get a hit. Create a node of the right class, link it in,
2471 if (isa<ArrayType>(Ty))
2472 return *Entry = new ConstantDataArray(Ty, Slot.first().data());
2474 assert(isa<VectorType>(Ty));
2475 return *Entry = new ConstantDataVector(Ty, Slot.first().data());
2478 void ConstantDataSequential::destroyConstant() {
2479 // Remove the constant from the StringMap.
2480 StringMap<ConstantDataSequential*> &CDSConstants =
2481 getType()->getContext().pImpl->CDSConstants;
2483 StringMap<ConstantDataSequential*>::iterator Slot =
2484 CDSConstants.find(getRawDataValues());
2486 assert(Slot != CDSConstants.end() && "CDS not found in uniquing table");
2488 ConstantDataSequential **Entry = &Slot->getValue();
2490 // Remove the entry from the hash table.
2491 if (!(*Entry)->Next) {
2492 // If there is only one value in the bucket (common case) it must be this
2493 // entry, and removing the entry should remove the bucket completely.
2494 assert((*Entry) == this && "Hash mismatch in ConstantDataSequential");
2495 getContext().pImpl->CDSConstants.erase(Slot);
2497 // Otherwise, there are multiple entries linked off the bucket, unlink the
2498 // node we care about but keep the bucket around.
2499 for (ConstantDataSequential *Node = *Entry; ;
2500 Entry = &Node->Next, Node = *Entry) {
2501 assert(Node && "Didn't find entry in its uniquing hash table!");
2502 // If we found our entry, unlink it from the list and we're done.
2504 *Entry = Node->Next;
2510 // If we were part of a list, make sure that we don't delete the list that is
2511 // still owned by the uniquing map.
2514 // Finally, actually delete it.
2515 destroyConstantImpl();
2518 /// get() constructors - Return a constant with array type with an element
2519 /// count and element type matching the ArrayRef passed in. Note that this
2520 /// can return a ConstantAggregateZero object.
2521 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint8_t> Elts) {
2522 Type *Ty = ArrayType::get(Type::getInt8Ty(Context), Elts.size());
2523 const char *Data = reinterpret_cast<const char *>(Elts.data());
2524 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*1), Ty);
2526 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint16_t> Elts){
2527 Type *Ty = ArrayType::get(Type::getInt16Ty(Context), Elts.size());
2528 const char *Data = reinterpret_cast<const char *>(Elts.data());
2529 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*2), Ty);
2531 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint32_t> Elts){
2532 Type *Ty = ArrayType::get(Type::getInt32Ty(Context), Elts.size());
2533 const char *Data = reinterpret_cast<const char *>(Elts.data());
2534 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2536 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint64_t> Elts){
2537 Type *Ty = ArrayType::get(Type::getInt64Ty(Context), Elts.size());
2538 const char *Data = reinterpret_cast<const char *>(Elts.data());
2539 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*8), Ty);
2541 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<float> Elts) {
2542 Type *Ty = ArrayType::get(Type::getFloatTy(Context), Elts.size());
2543 const char *Data = reinterpret_cast<const char *>(Elts.data());
2544 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2546 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<double> Elts) {
2547 Type *Ty = ArrayType::get(Type::getDoubleTy(Context), Elts.size());
2548 const char *Data = reinterpret_cast<const char *>(Elts.data());
2549 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2552 /// getFP() constructors - Return a constant with array type with an element
2553 /// count and element type of float with precision matching the number of
2554 /// bits in the ArrayRef passed in. (i.e. half for 16bits, float for 32bits,
2555 /// double for 64bits) Note that this can return a ConstantAggregateZero
2557 Constant *ConstantDataArray::getFP(LLVMContext &Context,
2558 ArrayRef<uint16_t> Elts) {
2559 Type *Ty = VectorType::get(Type::getHalfTy(Context), Elts.size());
2560 const char *Data = reinterpret_cast<const char *>(Elts.data());
2561 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 2), Ty);
2563 Constant *ConstantDataArray::getFP(LLVMContext &Context,
2564 ArrayRef<uint32_t> Elts) {
2565 Type *Ty = ArrayType::get(Type::getFloatTy(Context), Elts.size());
2566 const char *Data = reinterpret_cast<const char *>(Elts.data());
2567 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 4), Ty);
2569 Constant *ConstantDataArray::getFP(LLVMContext &Context,
2570 ArrayRef<uint64_t> Elts) {
2571 Type *Ty = ArrayType::get(Type::getDoubleTy(Context), Elts.size());
2572 const char *Data = reinterpret_cast<const char *>(Elts.data());
2573 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2576 /// getString - This method constructs a CDS and initializes it with a text
2577 /// string. The default behavior (AddNull==true) causes a null terminator to
2578 /// be placed at the end of the array (increasing the length of the string by
2579 /// one more than the StringRef would normally indicate. Pass AddNull=false
2580 /// to disable this behavior.
2581 Constant *ConstantDataArray::getString(LLVMContext &Context,
2582 StringRef Str, bool AddNull) {
2584 const uint8_t *Data = reinterpret_cast<const uint8_t *>(Str.data());
2585 return get(Context, makeArrayRef(const_cast<uint8_t *>(Data),
2589 SmallVector<uint8_t, 64> ElementVals;
2590 ElementVals.append(Str.begin(), Str.end());
2591 ElementVals.push_back(0);
2592 return get(Context, ElementVals);
2595 /// get() constructors - Return a constant with vector type with an element
2596 /// count and element type matching the ArrayRef passed in. Note that this
2597 /// can return a ConstantAggregateZero object.
2598 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint8_t> Elts){
2599 Type *Ty = VectorType::get(Type::getInt8Ty(Context), Elts.size());
2600 const char *Data = reinterpret_cast<const char *>(Elts.data());
2601 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*1), Ty);
2603 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint16_t> Elts){
2604 Type *Ty = VectorType::get(Type::getInt16Ty(Context), Elts.size());
2605 const char *Data = reinterpret_cast<const char *>(Elts.data());
2606 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*2), Ty);
2608 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint32_t> Elts){
2609 Type *Ty = VectorType::get(Type::getInt32Ty(Context), Elts.size());
2610 const char *Data = reinterpret_cast<const char *>(Elts.data());
2611 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2613 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint64_t> Elts){
2614 Type *Ty = VectorType::get(Type::getInt64Ty(Context), Elts.size());
2615 const char *Data = reinterpret_cast<const char *>(Elts.data());
2616 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*8), Ty);
2618 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<float> Elts) {
2619 Type *Ty = VectorType::get(Type::getFloatTy(Context), Elts.size());
2620 const char *Data = reinterpret_cast<const char *>(Elts.data());
2621 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2623 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<double> Elts) {
2624 Type *Ty = VectorType::get(Type::getDoubleTy(Context), Elts.size());
2625 const char *Data = reinterpret_cast<const char *>(Elts.data());
2626 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2629 /// getFP() constructors - Return a constant with vector type with an element
2630 /// count and element type of float with the precision matching the number of
2631 /// bits in the ArrayRef passed in. (i.e. half for 16bits, float for 32bits,
2632 /// double for 64bits) Note that this can return a ConstantAggregateZero
2634 Constant *ConstantDataVector::getFP(LLVMContext &Context,
2635 ArrayRef<uint16_t> Elts) {
2636 Type *Ty = VectorType::get(Type::getHalfTy(Context), Elts.size());
2637 const char *Data = reinterpret_cast<const char *>(Elts.data());
2638 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 2), Ty);
2640 Constant *ConstantDataVector::getFP(LLVMContext &Context,
2641 ArrayRef<uint32_t> Elts) {
2642 Type *Ty = VectorType::get(Type::getFloatTy(Context), Elts.size());
2643 const char *Data = reinterpret_cast<const char *>(Elts.data());
2644 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 4), Ty);
2646 Constant *ConstantDataVector::getFP(LLVMContext &Context,
2647 ArrayRef<uint64_t> Elts) {
2648 Type *Ty = VectorType::get(Type::getDoubleTy(Context), Elts.size());
2649 const char *Data = reinterpret_cast<const char *>(Elts.data());
2650 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2653 Constant *ConstantDataVector::getSplat(unsigned NumElts, Constant *V) {
2654 assert(isElementTypeCompatible(V->getType()) &&
2655 "Element type not compatible with ConstantData");
2656 if (ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
2657 if (CI->getType()->isIntegerTy(8)) {
2658 SmallVector<uint8_t, 16> Elts(NumElts, CI->getZExtValue());
2659 return get(V->getContext(), Elts);
2661 if (CI->getType()->isIntegerTy(16)) {
2662 SmallVector<uint16_t, 16> Elts(NumElts, CI->getZExtValue());
2663 return get(V->getContext(), Elts);
2665 if (CI->getType()->isIntegerTy(32)) {
2666 SmallVector<uint32_t, 16> Elts(NumElts, CI->getZExtValue());
2667 return get(V->getContext(), Elts);
2669 assert(CI->getType()->isIntegerTy(64) && "Unsupported ConstantData type");
2670 SmallVector<uint64_t, 16> Elts(NumElts, CI->getZExtValue());
2671 return get(V->getContext(), Elts);
2674 if (ConstantFP *CFP = dyn_cast<ConstantFP>(V)) {
2675 if (CFP->getType()->isFloatTy()) {
2676 SmallVector<uint32_t, 16> Elts(
2677 NumElts, CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
2678 return getFP(V->getContext(), Elts);
2680 if (CFP->getType()->isDoubleTy()) {
2681 SmallVector<uint64_t, 16> Elts(
2682 NumElts, CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
2683 return getFP(V->getContext(), Elts);
2686 return ConstantVector::getSplat(NumElts, V);
2690 /// getElementAsInteger - If this is a sequential container of integers (of
2691 /// any size), return the specified element in the low bits of a uint64_t.
2692 uint64_t ConstantDataSequential::getElementAsInteger(unsigned Elt) const {
2693 assert(isa<IntegerType>(getElementType()) &&
2694 "Accessor can only be used when element is an integer");
2695 const char *EltPtr = getElementPointer(Elt);
2697 // The data is stored in host byte order, make sure to cast back to the right
2698 // type to load with the right endianness.
2699 switch (getElementType()->getIntegerBitWidth()) {
2700 default: llvm_unreachable("Invalid bitwidth for CDS");
2702 return *const_cast<uint8_t *>(reinterpret_cast<const uint8_t *>(EltPtr));
2704 return *const_cast<uint16_t *>(reinterpret_cast<const uint16_t *>(EltPtr));
2706 return *const_cast<uint32_t *>(reinterpret_cast<const uint32_t *>(EltPtr));
2708 return *const_cast<uint64_t *>(reinterpret_cast<const uint64_t *>(EltPtr));
2712 /// getElementAsAPFloat - If this is a sequential container of floating point
2713 /// type, return the specified element as an APFloat.
2714 APFloat ConstantDataSequential::getElementAsAPFloat(unsigned Elt) const {
2715 const char *EltPtr = getElementPointer(Elt);
2717 switch (getElementType()->getTypeID()) {
2719 llvm_unreachable("Accessor can only be used when element is float/double!");
2720 case Type::FloatTyID: {
2721 auto EltVal = *reinterpret_cast<const uint32_t *>(EltPtr);
2722 return APFloat(APFloat::IEEEsingle, APInt(32, EltVal));
2724 case Type::DoubleTyID: {
2725 auto EltVal = *reinterpret_cast<const uint64_t *>(EltPtr);
2726 return APFloat(APFloat::IEEEdouble, APInt(64, EltVal));
2731 /// getElementAsFloat - If this is an sequential container of floats, return
2732 /// the specified element as a float.
2733 float ConstantDataSequential::getElementAsFloat(unsigned Elt) const {
2734 assert(getElementType()->isFloatTy() &&
2735 "Accessor can only be used when element is a 'float'");
2736 const float *EltPtr = reinterpret_cast<const float *>(getElementPointer(Elt));
2737 return *const_cast<float *>(EltPtr);
2740 /// getElementAsDouble - If this is an sequential container of doubles, return
2741 /// the specified element as a float.
2742 double ConstantDataSequential::getElementAsDouble(unsigned Elt) const {
2743 assert(getElementType()->isDoubleTy() &&
2744 "Accessor can only be used when element is a 'float'");
2745 const double *EltPtr =
2746 reinterpret_cast<const double *>(getElementPointer(Elt));
2747 return *const_cast<double *>(EltPtr);
2750 /// getElementAsConstant - Return a Constant for a specified index's element.
2751 /// Note that this has to compute a new constant to return, so it isn't as
2752 /// efficient as getElementAsInteger/Float/Double.
2753 Constant *ConstantDataSequential::getElementAsConstant(unsigned Elt) const {
2754 if (getElementType()->isFloatTy() || getElementType()->isDoubleTy())
2755 return ConstantFP::get(getContext(), getElementAsAPFloat(Elt));
2757 return ConstantInt::get(getElementType(), getElementAsInteger(Elt));
2760 /// isString - This method returns true if this is an array of i8.
2761 bool ConstantDataSequential::isString() const {
2762 return isa<ArrayType>(getType()) && getElementType()->isIntegerTy(8);
2765 /// isCString - This method returns true if the array "isString", ends with a
2766 /// nul byte, and does not contains any other nul bytes.
2767 bool ConstantDataSequential::isCString() const {
2771 StringRef Str = getAsString();
2773 // The last value must be nul.
2774 if (Str.back() != 0) return false;
2776 // Other elements must be non-nul.
2777 return Str.drop_back().find(0) == StringRef::npos;
2780 /// getSplatValue - If this is a splat constant, meaning that all of the
2781 /// elements have the same value, return that value. Otherwise return nullptr.
2782 Constant *ConstantDataVector::getSplatValue() const {
2783 const char *Base = getRawDataValues().data();
2785 // Compare elements 1+ to the 0'th element.
2786 unsigned EltSize = getElementByteSize();
2787 for (unsigned i = 1, e = getNumElements(); i != e; ++i)
2788 if (memcmp(Base, Base+i*EltSize, EltSize))
2791 // If they're all the same, return the 0th one as a representative.
2792 return getElementAsConstant(0);
2795 //===----------------------------------------------------------------------===//
2796 // replaceUsesOfWithOnConstant implementations
2798 /// replaceUsesOfWithOnConstant - Update this constant array to change uses of
2799 /// 'From' to be uses of 'To'. This must update the uniquing data structures
2802 /// Note that we intentionally replace all uses of From with To here. Consider
2803 /// a large array that uses 'From' 1000 times. By handling this case all here,
2804 /// ConstantArray::replaceUsesOfWithOnConstant is only invoked once, and that
2805 /// single invocation handles all 1000 uses. Handling them one at a time would
2806 /// work, but would be really slow because it would have to unique each updated
2809 void Constant::replaceUsesOfWithOnConstantImpl(Constant *Replacement) {
2810 // I do need to replace this with an existing value.
2811 assert(Replacement != this && "I didn't contain From!");
2813 // Everyone using this now uses the replacement.
2814 replaceAllUsesWith(Replacement);
2816 // Delete the old constant!
2820 void ConstantArray::replaceUsesOfWithOnConstant(Value *From, Value *To,
2822 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2823 Constant *ToC = cast<Constant>(To);
2825 SmallVector<Constant*, 8> Values;
2826 Values.reserve(getNumOperands()); // Build replacement array.
2828 // Fill values with the modified operands of the constant array. Also,
2829 // compute whether this turns into an all-zeros array.
2830 unsigned NumUpdated = 0;
2832 // Keep track of whether all the values in the array are "ToC".
2833 bool AllSame = true;
2834 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2835 Constant *Val = cast<Constant>(O->get());
2840 Values.push_back(Val);
2841 AllSame &= Val == ToC;
2844 if (AllSame && ToC->isNullValue()) {
2845 replaceUsesOfWithOnConstantImpl(ConstantAggregateZero::get(getType()));
2848 if (AllSame && isa<UndefValue>(ToC)) {
2849 replaceUsesOfWithOnConstantImpl(UndefValue::get(getType()));
2853 // Check for any other type of constant-folding.
2854 if (Constant *C = getImpl(getType(), Values)) {
2855 replaceUsesOfWithOnConstantImpl(C);
2859 // Update to the new value.
2860 if (Constant *C = getContext().pImpl->ArrayConstants.replaceOperandsInPlace(
2861 Values, this, From, ToC, NumUpdated, U - OperandList))
2862 replaceUsesOfWithOnConstantImpl(C);
2865 void ConstantStruct::replaceUsesOfWithOnConstant(Value *From, Value *To,
2867 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2868 Constant *ToC = cast<Constant>(To);
2870 unsigned OperandToUpdate = U-OperandList;
2871 assert(getOperand(OperandToUpdate) == From && "ReplaceAllUsesWith broken!");
2873 SmallVector<Constant*, 8> Values;
2874 Values.reserve(getNumOperands()); // Build replacement struct.
2876 // Fill values with the modified operands of the constant struct. Also,
2877 // compute whether this turns into an all-zeros struct.
2878 bool isAllZeros = false;
2879 bool isAllUndef = false;
2880 if (ToC->isNullValue()) {
2882 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2883 Constant *Val = cast<Constant>(O->get());
2884 Values.push_back(Val);
2885 if (isAllZeros) isAllZeros = Val->isNullValue();
2887 } else if (isa<UndefValue>(ToC)) {
2889 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2890 Constant *Val = cast<Constant>(O->get());
2891 Values.push_back(Val);
2892 if (isAllUndef) isAllUndef = isa<UndefValue>(Val);
2895 for (Use *O = OperandList, *E = OperandList + getNumOperands(); O != E; ++O)
2896 Values.push_back(cast<Constant>(O->get()));
2898 Values[OperandToUpdate] = ToC;
2901 replaceUsesOfWithOnConstantImpl(ConstantAggregateZero::get(getType()));
2905 replaceUsesOfWithOnConstantImpl(UndefValue::get(getType()));
2909 // Update to the new value.
2910 if (Constant *C = getContext().pImpl->StructConstants.replaceOperandsInPlace(
2911 Values, this, From, ToC))
2912 replaceUsesOfWithOnConstantImpl(C);
2915 void ConstantVector::replaceUsesOfWithOnConstant(Value *From, Value *To,
2917 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2918 Constant *ToC = cast<Constant>(To);
2920 SmallVector<Constant*, 8> Values;
2921 Values.reserve(getNumOperands()); // Build replacement array...
2922 unsigned NumUpdated = 0;
2923 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
2924 Constant *Val = getOperand(i);
2929 Values.push_back(Val);
2932 if (Constant *C = getImpl(Values)) {
2933 replaceUsesOfWithOnConstantImpl(C);
2937 // Update to the new value.
2938 if (Constant *C = getContext().pImpl->VectorConstants.replaceOperandsInPlace(
2939 Values, this, From, ToC, NumUpdated, U - OperandList))
2940 replaceUsesOfWithOnConstantImpl(C);
2943 void ConstantExpr::replaceUsesOfWithOnConstant(Value *From, Value *ToV,
2945 assert(isa<Constant>(ToV) && "Cannot make Constant refer to non-constant!");
2946 Constant *To = cast<Constant>(ToV);
2948 SmallVector<Constant*, 8> NewOps;
2949 unsigned NumUpdated = 0;
2950 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
2951 Constant *Op = getOperand(i);
2956 NewOps.push_back(Op);
2958 assert(NumUpdated && "I didn't contain From!");
2960 if (Constant *C = getWithOperands(NewOps, getType(), true)) {
2961 replaceUsesOfWithOnConstantImpl(C);
2965 // Update to the new value.
2966 if (Constant *C = getContext().pImpl->ExprConstants.replaceOperandsInPlace(
2967 NewOps, this, From, To, NumUpdated, U - OperandList))
2968 replaceUsesOfWithOnConstantImpl(C);
2971 Instruction *ConstantExpr::getAsInstruction() {
2972 SmallVector<Value *, 4> ValueOperands(op_begin(), op_end());
2973 ArrayRef<Value*> Ops(ValueOperands);
2975 switch (getOpcode()) {
2976 case Instruction::Trunc:
2977 case Instruction::ZExt:
2978 case Instruction::SExt:
2979 case Instruction::FPTrunc:
2980 case Instruction::FPExt:
2981 case Instruction::UIToFP:
2982 case Instruction::SIToFP:
2983 case Instruction::FPToUI:
2984 case Instruction::FPToSI:
2985 case Instruction::PtrToInt:
2986 case Instruction::IntToPtr:
2987 case Instruction::BitCast:
2988 case Instruction::AddrSpaceCast:
2989 return CastInst::Create((Instruction::CastOps)getOpcode(),
2991 case Instruction::Select:
2992 return SelectInst::Create(Ops[0], Ops[1], Ops[2]);
2993 case Instruction::InsertElement:
2994 return InsertElementInst::Create(Ops[0], Ops[1], Ops[2]);
2995 case Instruction::ExtractElement:
2996 return ExtractElementInst::Create(Ops[0], Ops[1]);
2997 case Instruction::InsertValue:
2998 return InsertValueInst::Create(Ops[0], Ops[1], getIndices());
2999 case Instruction::ExtractValue:
3000 return ExtractValueInst::Create(Ops[0], getIndices());
3001 case Instruction::ShuffleVector:
3002 return new ShuffleVectorInst(Ops[0], Ops[1], Ops[2]);
3004 case Instruction::GetElementPtr: {
3005 const auto *GO = cast<GEPOperator>(this);
3006 if (GO->isInBounds())
3007 return GetElementPtrInst::CreateInBounds(GO->getSourceElementType(),
3008 Ops[0], Ops.slice(1));
3009 return GetElementPtrInst::Create(GO->getSourceElementType(), Ops[0],
3012 case Instruction::ICmp:
3013 case Instruction::FCmp:
3014 return CmpInst::Create((Instruction::OtherOps)getOpcode(),
3015 getPredicate(), Ops[0], Ops[1]);
3018 assert(getNumOperands() == 2 && "Must be binary operator?");
3019 BinaryOperator *BO =
3020 BinaryOperator::Create((Instruction::BinaryOps)getOpcode(),
3022 if (isa<OverflowingBinaryOperator>(BO)) {
3023 BO->setHasNoUnsignedWrap(SubclassOptionalData &
3024 OverflowingBinaryOperator::NoUnsignedWrap);
3025 BO->setHasNoSignedWrap(SubclassOptionalData &
3026 OverflowingBinaryOperator::NoSignedWrap);
3028 if (isa<PossiblyExactOperator>(BO))
3029 BO->setIsExact(SubclassOptionalData & PossiblyExactOperator::IsExact);