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, cpnull is null for pointers, none for
86 return isa<ConstantAggregateZero>(this) || isa<ConstantPointerNull>(this) ||
87 isa<ConstantTokenNone>(this);
90 bool Constant::isAllOnesValue() const {
91 // Check for -1 integers
92 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
93 return CI->isMinusOne();
95 // Check for FP which are bitcasted from -1 integers
96 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
97 return CFP->getValueAPF().bitcastToAPInt().isAllOnesValue();
99 // Check for constant vectors which are splats of -1 values.
100 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
101 if (Constant *Splat = CV->getSplatValue())
102 return Splat->isAllOnesValue();
104 // Check for constant vectors which are splats of -1 values.
105 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
106 if (Constant *Splat = CV->getSplatValue())
107 return Splat->isAllOnesValue();
112 bool Constant::isOneValue() const {
113 // Check for 1 integers
114 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
117 // Check for FP which are bitcasted from 1 integers
118 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
119 return CFP->getValueAPF().bitcastToAPInt() == 1;
121 // Check for constant vectors which are splats of 1 values.
122 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
123 if (Constant *Splat = CV->getSplatValue())
124 return Splat->isOneValue();
126 // Check for constant vectors which are splats of 1 values.
127 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
128 if (Constant *Splat = CV->getSplatValue())
129 return Splat->isOneValue();
134 bool Constant::isMinSignedValue() const {
135 // Check for INT_MIN integers
136 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
137 return CI->isMinValue(/*isSigned=*/true);
139 // Check for FP which are bitcasted from INT_MIN integers
140 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
141 return CFP->getValueAPF().bitcastToAPInt().isMinSignedValue();
143 // Check for constant vectors which are splats of INT_MIN values.
144 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
145 if (Constant *Splat = CV->getSplatValue())
146 return Splat->isMinSignedValue();
148 // Check for constant vectors which are splats of INT_MIN values.
149 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
150 if (Constant *Splat = CV->getSplatValue())
151 return Splat->isMinSignedValue();
156 bool Constant::isNotMinSignedValue() const {
157 // Check for INT_MIN integers
158 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
159 return !CI->isMinValue(/*isSigned=*/true);
161 // Check for FP which are bitcasted from INT_MIN integers
162 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
163 return !CFP->getValueAPF().bitcastToAPInt().isMinSignedValue();
165 // Check for constant vectors which are splats of INT_MIN values.
166 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
167 if (Constant *Splat = CV->getSplatValue())
168 return Splat->isNotMinSignedValue();
170 // Check for constant vectors which are splats of INT_MIN values.
171 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
172 if (Constant *Splat = CV->getSplatValue())
173 return Splat->isNotMinSignedValue();
175 // It *may* contain INT_MIN, we can't tell.
179 // Constructor to create a '0' constant of arbitrary type...
180 Constant *Constant::getNullValue(Type *Ty) {
181 switch (Ty->getTypeID()) {
182 case Type::IntegerTyID:
183 return ConstantInt::get(Ty, 0);
185 return ConstantFP::get(Ty->getContext(),
186 APFloat::getZero(APFloat::IEEEhalf));
187 case Type::FloatTyID:
188 return ConstantFP::get(Ty->getContext(),
189 APFloat::getZero(APFloat::IEEEsingle));
190 case Type::DoubleTyID:
191 return ConstantFP::get(Ty->getContext(),
192 APFloat::getZero(APFloat::IEEEdouble));
193 case Type::X86_FP80TyID:
194 return ConstantFP::get(Ty->getContext(),
195 APFloat::getZero(APFloat::x87DoubleExtended));
196 case Type::FP128TyID:
197 return ConstantFP::get(Ty->getContext(),
198 APFloat::getZero(APFloat::IEEEquad));
199 case Type::PPC_FP128TyID:
200 return ConstantFP::get(Ty->getContext(),
201 APFloat(APFloat::PPCDoubleDouble,
202 APInt::getNullValue(128)));
203 case Type::PointerTyID:
204 return ConstantPointerNull::get(cast<PointerType>(Ty));
205 case Type::StructTyID:
206 case Type::ArrayTyID:
207 case Type::VectorTyID:
208 return ConstantAggregateZero::get(Ty);
209 case Type::TokenTyID:
210 return ConstantTokenNone::get(Ty->getContext());
212 // Function, Label, or Opaque type?
213 llvm_unreachable("Cannot create a null constant of that type!");
217 Constant *Constant::getIntegerValue(Type *Ty, const APInt &V) {
218 Type *ScalarTy = Ty->getScalarType();
220 // Create the base integer constant.
221 Constant *C = ConstantInt::get(Ty->getContext(), V);
223 // Convert an integer to a pointer, if necessary.
224 if (PointerType *PTy = dyn_cast<PointerType>(ScalarTy))
225 C = ConstantExpr::getIntToPtr(C, PTy);
227 // Broadcast a scalar to a vector, if necessary.
228 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
229 C = ConstantVector::getSplat(VTy->getNumElements(), C);
234 Constant *Constant::getAllOnesValue(Type *Ty) {
235 if (IntegerType *ITy = dyn_cast<IntegerType>(Ty))
236 return ConstantInt::get(Ty->getContext(),
237 APInt::getAllOnesValue(ITy->getBitWidth()));
239 if (Ty->isFloatingPointTy()) {
240 APFloat FL = APFloat::getAllOnesValue(Ty->getPrimitiveSizeInBits(),
241 !Ty->isPPC_FP128Ty());
242 return ConstantFP::get(Ty->getContext(), FL);
245 VectorType *VTy = cast<VectorType>(Ty);
246 return ConstantVector::getSplat(VTy->getNumElements(),
247 getAllOnesValue(VTy->getElementType()));
250 /// getAggregateElement - For aggregates (struct/array/vector) return the
251 /// constant that corresponds to the specified element if possible, or null if
252 /// not. This can return null if the element index is a ConstantExpr, or if
253 /// 'this' is a constant expr.
254 Constant *Constant::getAggregateElement(unsigned Elt) const {
255 if (const ConstantStruct *CS = dyn_cast<ConstantStruct>(this))
256 return Elt < CS->getNumOperands() ? CS->getOperand(Elt) : nullptr;
258 if (const ConstantArray *CA = dyn_cast<ConstantArray>(this))
259 return Elt < CA->getNumOperands() ? CA->getOperand(Elt) : nullptr;
261 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
262 return Elt < CV->getNumOperands() ? CV->getOperand(Elt) : nullptr;
264 if (const ConstantAggregateZero *CAZ = dyn_cast<ConstantAggregateZero>(this))
265 return Elt < CAZ->getNumElements() ? CAZ->getElementValue(Elt) : nullptr;
267 if (const UndefValue *UV = dyn_cast<UndefValue>(this))
268 return Elt < UV->getNumElements() ? UV->getElementValue(Elt) : nullptr;
270 if (const ConstantDataSequential *CDS =dyn_cast<ConstantDataSequential>(this))
271 return Elt < CDS->getNumElements() ? CDS->getElementAsConstant(Elt)
276 Constant *Constant::getAggregateElement(Constant *Elt) const {
277 assert(isa<IntegerType>(Elt->getType()) && "Index must be an integer");
278 if (ConstantInt *CI = dyn_cast<ConstantInt>(Elt))
279 return getAggregateElement(CI->getZExtValue());
283 void Constant::destroyConstant() {
284 /// First call destroyConstantImpl on the subclass. This gives the subclass
285 /// a chance to remove the constant from any maps/pools it's contained in.
286 switch (getValueID()) {
288 llvm_unreachable("Not a constant!");
289 #define HANDLE_CONSTANT(Name) \
290 case Value::Name##Val: \
291 cast<Name>(this)->destroyConstantImpl(); \
293 #include "llvm/IR/Value.def"
296 // When a Constant is destroyed, there may be lingering
297 // references to the constant by other constants in the constant pool. These
298 // constants are implicitly dependent on the module that is being deleted,
299 // but they don't know that. Because we only find out when the CPV is
300 // deleted, we must now notify all of our users (that should only be
301 // Constants) that they are, in fact, invalid now and should be deleted.
303 while (!use_empty()) {
304 Value *V = user_back();
305 #ifndef NDEBUG // Only in -g mode...
306 if (!isa<Constant>(V)) {
307 dbgs() << "While deleting: " << *this
308 << "\n\nUse still stuck around after Def is destroyed: " << *V
312 assert(isa<Constant>(V) && "References remain to Constant being destroyed");
313 cast<Constant>(V)->destroyConstant();
315 // The constant should remove itself from our use list...
316 assert((use_empty() || user_back() != V) && "Constant not removed!");
319 // Value has no outstanding references it is safe to delete it now...
323 static bool canTrapImpl(const Constant *C,
324 SmallPtrSetImpl<const ConstantExpr *> &NonTrappingOps) {
325 assert(C->getType()->isFirstClassType() && "Cannot evaluate aggregate vals!");
326 // The only thing that could possibly trap are constant exprs.
327 const ConstantExpr *CE = dyn_cast<ConstantExpr>(C);
331 // ConstantExpr traps if any operands can trap.
332 for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i) {
333 if (ConstantExpr *Op = dyn_cast<ConstantExpr>(CE->getOperand(i))) {
334 if (NonTrappingOps.insert(Op).second && canTrapImpl(Op, NonTrappingOps))
339 // Otherwise, only specific operations can trap.
340 switch (CE->getOpcode()) {
343 case Instruction::UDiv:
344 case Instruction::SDiv:
345 case Instruction::FDiv:
346 case Instruction::URem:
347 case Instruction::SRem:
348 case Instruction::FRem:
349 // Div and rem can trap if the RHS is not known to be non-zero.
350 if (!isa<ConstantInt>(CE->getOperand(1)) ||CE->getOperand(1)->isNullValue())
356 /// canTrap - Return true if evaluation of this constant could trap. This is
357 /// true for things like constant expressions that could divide by zero.
358 bool Constant::canTrap() const {
359 SmallPtrSet<const ConstantExpr *, 4> NonTrappingOps;
360 return canTrapImpl(this, NonTrappingOps);
363 /// Check if C contains a GlobalValue for which Predicate is true.
365 ConstHasGlobalValuePredicate(const Constant *C,
366 bool (*Predicate)(const GlobalValue *)) {
367 SmallPtrSet<const Constant *, 8> Visited;
368 SmallVector<const Constant *, 8> WorkList;
369 WorkList.push_back(C);
372 while (!WorkList.empty()) {
373 const Constant *WorkItem = WorkList.pop_back_val();
374 if (const auto *GV = dyn_cast<GlobalValue>(WorkItem))
377 for (const Value *Op : WorkItem->operands()) {
378 const Constant *ConstOp = dyn_cast<Constant>(Op);
381 if (Visited.insert(ConstOp).second)
382 WorkList.push_back(ConstOp);
388 /// Return true if the value can vary between threads.
389 bool Constant::isThreadDependent() const {
390 auto DLLImportPredicate = [](const GlobalValue *GV) {
391 return GV->isThreadLocal();
393 return ConstHasGlobalValuePredicate(this, DLLImportPredicate);
396 bool Constant::isDLLImportDependent() const {
397 auto DLLImportPredicate = [](const GlobalValue *GV) {
398 return GV->hasDLLImportStorageClass();
400 return ConstHasGlobalValuePredicate(this, DLLImportPredicate);
403 /// Return true if the constant has users other than constant exprs and other
405 bool Constant::isConstantUsed() const {
406 for (const User *U : users()) {
407 const Constant *UC = dyn_cast<Constant>(U);
408 if (!UC || isa<GlobalValue>(UC))
411 if (UC->isConstantUsed())
419 /// getRelocationInfo - This method classifies the entry according to
420 /// whether or not it may generate a relocation entry. This must be
421 /// conservative, so if it might codegen to a relocatable entry, it should say
422 /// so. The return values are:
424 /// NoRelocation: This constant pool entry is guaranteed to never have a
425 /// relocation applied to it (because it holds a simple constant like
427 /// LocalRelocation: This entry has relocations, but the entries are
428 /// guaranteed to be resolvable by the static linker, so the dynamic
429 /// linker will never see them.
430 /// GlobalRelocations: This entry may have arbitrary relocations.
432 /// FIXME: This really should not be in IR.
433 Constant::PossibleRelocationsTy Constant::getRelocationInfo() const {
434 if (const GlobalValue *GV = dyn_cast<GlobalValue>(this)) {
435 if (GV->hasLocalLinkage() || GV->hasHiddenVisibility())
436 return LocalRelocation; // Local to this file/library.
437 return GlobalRelocations; // Global reference.
440 if (const BlockAddress *BA = dyn_cast<BlockAddress>(this))
441 return BA->getFunction()->getRelocationInfo();
443 // While raw uses of blockaddress need to be relocated, differences between
444 // two of them don't when they are for labels in the same function. This is a
445 // common idiom when creating a table for the indirect goto extension, so we
446 // handle it efficiently here.
447 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(this))
448 if (CE->getOpcode() == Instruction::Sub) {
449 ConstantExpr *LHS = dyn_cast<ConstantExpr>(CE->getOperand(0));
450 ConstantExpr *RHS = dyn_cast<ConstantExpr>(CE->getOperand(1));
452 LHS->getOpcode() == Instruction::PtrToInt &&
453 RHS->getOpcode() == Instruction::PtrToInt &&
454 isa<BlockAddress>(LHS->getOperand(0)) &&
455 isa<BlockAddress>(RHS->getOperand(0)) &&
456 cast<BlockAddress>(LHS->getOperand(0))->getFunction() ==
457 cast<BlockAddress>(RHS->getOperand(0))->getFunction())
461 PossibleRelocationsTy Result = NoRelocation;
462 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
463 Result = std::max(Result,
464 cast<Constant>(getOperand(i))->getRelocationInfo());
469 /// removeDeadUsersOfConstant - If the specified constantexpr is dead, remove
470 /// it. This involves recursively eliminating any dead users of the
472 static bool removeDeadUsersOfConstant(const Constant *C) {
473 if (isa<GlobalValue>(C)) return false; // Cannot remove this
475 while (!C->use_empty()) {
476 const Constant *User = dyn_cast<Constant>(C->user_back());
477 if (!User) return false; // Non-constant usage;
478 if (!removeDeadUsersOfConstant(User))
479 return false; // Constant wasn't dead
482 const_cast<Constant*>(C)->destroyConstant();
487 /// removeDeadConstantUsers - If there are any dead constant users dangling
488 /// off of this constant, remove them. This method is useful for clients
489 /// that want to check to see if a global is unused, but don't want to deal
490 /// with potentially dead constants hanging off of the globals.
491 void Constant::removeDeadConstantUsers() const {
492 Value::const_user_iterator I = user_begin(), E = user_end();
493 Value::const_user_iterator LastNonDeadUser = E;
495 const Constant *User = dyn_cast<Constant>(*I);
502 if (!removeDeadUsersOfConstant(User)) {
503 // If the constant wasn't dead, remember that this was the last live use
504 // and move on to the next constant.
510 // If the constant was dead, then the iterator is invalidated.
511 if (LastNonDeadUser == E) {
523 //===----------------------------------------------------------------------===//
525 //===----------------------------------------------------------------------===//
527 void ConstantInt::anchor() { }
529 ConstantInt::ConstantInt(IntegerType *Ty, const APInt& V)
530 : Constant(Ty, ConstantIntVal, nullptr, 0), Val(V) {
531 assert(V.getBitWidth() == Ty->getBitWidth() && "Invalid constant for type");
534 ConstantInt *ConstantInt::getTrue(LLVMContext &Context) {
535 LLVMContextImpl *pImpl = Context.pImpl;
536 if (!pImpl->TheTrueVal)
537 pImpl->TheTrueVal = ConstantInt::get(Type::getInt1Ty(Context), 1);
538 return pImpl->TheTrueVal;
541 ConstantInt *ConstantInt::getFalse(LLVMContext &Context) {
542 LLVMContextImpl *pImpl = Context.pImpl;
543 if (!pImpl->TheFalseVal)
544 pImpl->TheFalseVal = ConstantInt::get(Type::getInt1Ty(Context), 0);
545 return pImpl->TheFalseVal;
548 Constant *ConstantInt::getTrue(Type *Ty) {
549 VectorType *VTy = dyn_cast<VectorType>(Ty);
551 assert(Ty->isIntegerTy(1) && "True must be i1 or vector of i1.");
552 return ConstantInt::getTrue(Ty->getContext());
554 assert(VTy->getElementType()->isIntegerTy(1) &&
555 "True must be vector of i1 or i1.");
556 return ConstantVector::getSplat(VTy->getNumElements(),
557 ConstantInt::getTrue(Ty->getContext()));
560 Constant *ConstantInt::getFalse(Type *Ty) {
561 VectorType *VTy = dyn_cast<VectorType>(Ty);
563 assert(Ty->isIntegerTy(1) && "False must be i1 or vector of i1.");
564 return ConstantInt::getFalse(Ty->getContext());
566 assert(VTy->getElementType()->isIntegerTy(1) &&
567 "False must be vector of i1 or i1.");
568 return ConstantVector::getSplat(VTy->getNumElements(),
569 ConstantInt::getFalse(Ty->getContext()));
572 // Get a ConstantInt from an APInt.
573 ConstantInt *ConstantInt::get(LLVMContext &Context, const APInt &V) {
574 // get an existing value or the insertion position
575 LLVMContextImpl *pImpl = Context.pImpl;
576 ConstantInt *&Slot = pImpl->IntConstants[V];
578 // Get the corresponding integer type for the bit width of the value.
579 IntegerType *ITy = IntegerType::get(Context, V.getBitWidth());
580 Slot = new ConstantInt(ITy, V);
582 assert(Slot->getType() == IntegerType::get(Context, V.getBitWidth()));
586 Constant *ConstantInt::get(Type *Ty, uint64_t V, bool isSigned) {
587 Constant *C = get(cast<IntegerType>(Ty->getScalarType()), V, isSigned);
589 // For vectors, broadcast the value.
590 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
591 return ConstantVector::getSplat(VTy->getNumElements(), C);
596 ConstantInt *ConstantInt::get(IntegerType *Ty, uint64_t V,
598 return get(Ty->getContext(), APInt(Ty->getBitWidth(), V, isSigned));
601 ConstantInt *ConstantInt::getSigned(IntegerType *Ty, int64_t V) {
602 return get(Ty, V, true);
605 Constant *ConstantInt::getSigned(Type *Ty, int64_t V) {
606 return get(Ty, V, true);
609 Constant *ConstantInt::get(Type *Ty, const APInt& V) {
610 ConstantInt *C = get(Ty->getContext(), V);
611 assert(C->getType() == Ty->getScalarType() &&
612 "ConstantInt type doesn't match the type implied by its value!");
614 // For vectors, broadcast the value.
615 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
616 return ConstantVector::getSplat(VTy->getNumElements(), C);
621 ConstantInt *ConstantInt::get(IntegerType* Ty, StringRef Str,
623 return get(Ty->getContext(), APInt(Ty->getBitWidth(), Str, radix));
626 /// Remove the constant from the constant table.
627 void ConstantInt::destroyConstantImpl() {
628 llvm_unreachable("You can't ConstantInt->destroyConstantImpl()!");
631 //===----------------------------------------------------------------------===//
633 //===----------------------------------------------------------------------===//
635 static const fltSemantics *TypeToFloatSemantics(Type *Ty) {
637 return &APFloat::IEEEhalf;
639 return &APFloat::IEEEsingle;
640 if (Ty->isDoubleTy())
641 return &APFloat::IEEEdouble;
642 if (Ty->isX86_FP80Ty())
643 return &APFloat::x87DoubleExtended;
644 else if (Ty->isFP128Ty())
645 return &APFloat::IEEEquad;
647 assert(Ty->isPPC_FP128Ty() && "Unknown FP format");
648 return &APFloat::PPCDoubleDouble;
651 void ConstantFP::anchor() { }
653 /// get() - This returns a constant fp for the specified value in the
654 /// specified type. This should only be used for simple constant values like
655 /// 2.0/1.0 etc, that are known-valid both as double and as the target format.
656 Constant *ConstantFP::get(Type *Ty, double V) {
657 LLVMContext &Context = Ty->getContext();
661 FV.convert(*TypeToFloatSemantics(Ty->getScalarType()),
662 APFloat::rmNearestTiesToEven, &ignored);
663 Constant *C = get(Context, FV);
665 // For vectors, broadcast the value.
666 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
667 return ConstantVector::getSplat(VTy->getNumElements(), C);
673 Constant *ConstantFP::get(Type *Ty, StringRef Str) {
674 LLVMContext &Context = Ty->getContext();
676 APFloat FV(*TypeToFloatSemantics(Ty->getScalarType()), Str);
677 Constant *C = get(Context, FV);
679 // For vectors, broadcast the value.
680 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
681 return ConstantVector::getSplat(VTy->getNumElements(), C);
686 Constant *ConstantFP::getNaN(Type *Ty, bool Negative, unsigned Type) {
687 const fltSemantics &Semantics = *TypeToFloatSemantics(Ty->getScalarType());
688 APFloat NaN = APFloat::getNaN(Semantics, Negative, Type);
689 Constant *C = get(Ty->getContext(), NaN);
691 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
692 return ConstantVector::getSplat(VTy->getNumElements(), C);
697 Constant *ConstantFP::getNegativeZero(Type *Ty) {
698 const fltSemantics &Semantics = *TypeToFloatSemantics(Ty->getScalarType());
699 APFloat NegZero = APFloat::getZero(Semantics, /*Negative=*/true);
700 Constant *C = get(Ty->getContext(), NegZero);
702 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
703 return ConstantVector::getSplat(VTy->getNumElements(), C);
709 Constant *ConstantFP::getZeroValueForNegation(Type *Ty) {
710 if (Ty->isFPOrFPVectorTy())
711 return getNegativeZero(Ty);
713 return Constant::getNullValue(Ty);
717 // ConstantFP accessors.
718 ConstantFP* ConstantFP::get(LLVMContext &Context, const APFloat& V) {
719 LLVMContextImpl* pImpl = Context.pImpl;
721 ConstantFP *&Slot = pImpl->FPConstants[V];
725 if (&V.getSemantics() == &APFloat::IEEEhalf)
726 Ty = Type::getHalfTy(Context);
727 else if (&V.getSemantics() == &APFloat::IEEEsingle)
728 Ty = Type::getFloatTy(Context);
729 else if (&V.getSemantics() == &APFloat::IEEEdouble)
730 Ty = Type::getDoubleTy(Context);
731 else if (&V.getSemantics() == &APFloat::x87DoubleExtended)
732 Ty = Type::getX86_FP80Ty(Context);
733 else if (&V.getSemantics() == &APFloat::IEEEquad)
734 Ty = Type::getFP128Ty(Context);
736 assert(&V.getSemantics() == &APFloat::PPCDoubleDouble &&
737 "Unknown FP format");
738 Ty = Type::getPPC_FP128Ty(Context);
740 Slot = new ConstantFP(Ty, V);
746 Constant *ConstantFP::getInfinity(Type *Ty, bool Negative) {
747 const fltSemantics &Semantics = *TypeToFloatSemantics(Ty->getScalarType());
748 Constant *C = get(Ty->getContext(), APFloat::getInf(Semantics, Negative));
750 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
751 return ConstantVector::getSplat(VTy->getNumElements(), C);
756 ConstantFP::ConstantFP(Type *Ty, const APFloat& V)
757 : Constant(Ty, ConstantFPVal, nullptr, 0), Val(V) {
758 assert(&V.getSemantics() == TypeToFloatSemantics(Ty) &&
762 bool ConstantFP::isExactlyValue(const APFloat &V) const {
763 return Val.bitwiseIsEqual(V);
766 /// Remove the constant from the constant table.
767 void ConstantFP::destroyConstantImpl() {
768 llvm_unreachable("You can't ConstantInt->destroyConstantImpl()!");
771 //===----------------------------------------------------------------------===//
772 // ConstantAggregateZero Implementation
773 //===----------------------------------------------------------------------===//
775 /// getSequentialElement - If this CAZ has array or vector type, return a zero
776 /// with the right element type.
777 Constant *ConstantAggregateZero::getSequentialElement() const {
778 return Constant::getNullValue(getType()->getSequentialElementType());
781 /// getStructElement - If this CAZ has struct type, return a zero with the
782 /// right element type for the specified element.
783 Constant *ConstantAggregateZero::getStructElement(unsigned Elt) const {
784 return Constant::getNullValue(getType()->getStructElementType(Elt));
787 /// getElementValue - Return a zero of the right value for the specified GEP
788 /// index if we can, otherwise return null (e.g. if C is a ConstantExpr).
789 Constant *ConstantAggregateZero::getElementValue(Constant *C) const {
790 if (isa<SequentialType>(getType()))
791 return getSequentialElement();
792 return getStructElement(cast<ConstantInt>(C)->getZExtValue());
795 /// getElementValue - Return a zero of the right value for the specified GEP
797 Constant *ConstantAggregateZero::getElementValue(unsigned Idx) const {
798 if (isa<SequentialType>(getType()))
799 return getSequentialElement();
800 return getStructElement(Idx);
803 unsigned ConstantAggregateZero::getNumElements() const {
804 Type *Ty = getType();
805 if (auto *AT = dyn_cast<ArrayType>(Ty))
806 return AT->getNumElements();
807 if (auto *VT = dyn_cast<VectorType>(Ty))
808 return VT->getNumElements();
809 return Ty->getStructNumElements();
812 //===----------------------------------------------------------------------===//
813 // UndefValue Implementation
814 //===----------------------------------------------------------------------===//
816 /// getSequentialElement - If this undef has array or vector type, return an
817 /// undef with the right element type.
818 UndefValue *UndefValue::getSequentialElement() const {
819 return UndefValue::get(getType()->getSequentialElementType());
822 /// getStructElement - If this undef has struct type, return a zero with the
823 /// right element type for the specified element.
824 UndefValue *UndefValue::getStructElement(unsigned Elt) const {
825 return UndefValue::get(getType()->getStructElementType(Elt));
828 /// getElementValue - Return an undef of the right value for the specified GEP
829 /// index if we can, otherwise return null (e.g. if C is a ConstantExpr).
830 UndefValue *UndefValue::getElementValue(Constant *C) const {
831 if (isa<SequentialType>(getType()))
832 return getSequentialElement();
833 return getStructElement(cast<ConstantInt>(C)->getZExtValue());
836 /// getElementValue - Return an undef of the right value for the specified GEP
838 UndefValue *UndefValue::getElementValue(unsigned Idx) const {
839 if (isa<SequentialType>(getType()))
840 return getSequentialElement();
841 return getStructElement(Idx);
844 unsigned UndefValue::getNumElements() const {
845 Type *Ty = getType();
846 if (auto *AT = dyn_cast<ArrayType>(Ty))
847 return AT->getNumElements();
848 if (auto *VT = dyn_cast<VectorType>(Ty))
849 return VT->getNumElements();
850 return Ty->getStructNumElements();
853 //===----------------------------------------------------------------------===//
854 // ConstantXXX Classes
855 //===----------------------------------------------------------------------===//
857 template <typename ItTy, typename EltTy>
858 static bool rangeOnlyContains(ItTy Start, ItTy End, EltTy Elt) {
859 for (; Start != End; ++Start)
865 ConstantArray::ConstantArray(ArrayType *T, ArrayRef<Constant *> V)
866 : Constant(T, ConstantArrayVal,
867 OperandTraits<ConstantArray>::op_end(this) - V.size(),
869 assert(V.size() == T->getNumElements() &&
870 "Invalid initializer vector for constant array");
871 for (unsigned i = 0, e = V.size(); i != e; ++i)
872 assert(V[i]->getType() == T->getElementType() &&
873 "Initializer for array element doesn't match array element type!");
874 std::copy(V.begin(), V.end(), op_begin());
877 Constant *ConstantArray::get(ArrayType *Ty, ArrayRef<Constant*> V) {
878 if (Constant *C = getImpl(Ty, V))
880 return Ty->getContext().pImpl->ArrayConstants.getOrCreate(Ty, V);
882 Constant *ConstantArray::getImpl(ArrayType *Ty, ArrayRef<Constant*> V) {
883 // Empty arrays are canonicalized to ConstantAggregateZero.
885 return ConstantAggregateZero::get(Ty);
887 for (unsigned i = 0, e = V.size(); i != e; ++i) {
888 assert(V[i]->getType() == Ty->getElementType() &&
889 "Wrong type in array element initializer");
892 // If this is an all-zero array, return a ConstantAggregateZero object. If
893 // all undef, return an UndefValue, if "all simple", then return a
894 // ConstantDataArray.
896 if (isa<UndefValue>(C) && rangeOnlyContains(V.begin(), V.end(), C))
897 return UndefValue::get(Ty);
899 if (C->isNullValue() && rangeOnlyContains(V.begin(), V.end(), C))
900 return ConstantAggregateZero::get(Ty);
902 // Check to see if all of the elements are ConstantFP or ConstantInt and if
903 // the element type is compatible with ConstantDataVector. If so, use it.
904 if (ConstantDataSequential::isElementTypeCompatible(C->getType())) {
905 // We speculatively build the elements here even if it turns out that there
906 // is a constantexpr or something else weird in the array, since it is so
907 // uncommon for that to happen.
908 if (ConstantInt *CI = dyn_cast<ConstantInt>(C)) {
909 if (CI->getType()->isIntegerTy(8)) {
910 SmallVector<uint8_t, 16> Elts;
911 for (unsigned i = 0, e = V.size(); i != e; ++i)
912 if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
913 Elts.push_back(CI->getZExtValue());
916 if (Elts.size() == V.size())
917 return ConstantDataArray::get(C->getContext(), Elts);
918 } else if (CI->getType()->isIntegerTy(16)) {
919 SmallVector<uint16_t, 16> Elts;
920 for (unsigned i = 0, e = V.size(); i != e; ++i)
921 if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
922 Elts.push_back(CI->getZExtValue());
925 if (Elts.size() == V.size())
926 return ConstantDataArray::get(C->getContext(), Elts);
927 } else if (CI->getType()->isIntegerTy(32)) {
928 SmallVector<uint32_t, 16> Elts;
929 for (unsigned i = 0, e = V.size(); i != e; ++i)
930 if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
931 Elts.push_back(CI->getZExtValue());
934 if (Elts.size() == V.size())
935 return ConstantDataArray::get(C->getContext(), Elts);
936 } else if (CI->getType()->isIntegerTy(64)) {
937 SmallVector<uint64_t, 16> Elts;
938 for (unsigned i = 0, e = V.size(); i != e; ++i)
939 if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
940 Elts.push_back(CI->getZExtValue());
943 if (Elts.size() == V.size())
944 return ConstantDataArray::get(C->getContext(), Elts);
948 if (ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
949 if (CFP->getType()->isFloatTy()) {
950 SmallVector<uint32_t, 16> Elts;
951 for (unsigned i = 0, e = V.size(); i != e; ++i)
952 if (ConstantFP *CFP = dyn_cast<ConstantFP>(V[i]))
954 CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
957 if (Elts.size() == V.size())
958 return ConstantDataArray::getFP(C->getContext(), Elts);
959 } else if (CFP->getType()->isDoubleTy()) {
960 SmallVector<uint64_t, 16> Elts;
961 for (unsigned i = 0, e = V.size(); i != e; ++i)
962 if (ConstantFP *CFP = dyn_cast<ConstantFP>(V[i]))
964 CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
967 if (Elts.size() == V.size())
968 return ConstantDataArray::getFP(C->getContext(), Elts);
973 // Otherwise, we really do want to create a ConstantArray.
977 /// getTypeForElements - Return an anonymous struct type to use for a constant
978 /// with the specified set of elements. The list must not be empty.
979 StructType *ConstantStruct::getTypeForElements(LLVMContext &Context,
980 ArrayRef<Constant*> V,
982 unsigned VecSize = V.size();
983 SmallVector<Type*, 16> EltTypes(VecSize);
984 for (unsigned i = 0; i != VecSize; ++i)
985 EltTypes[i] = V[i]->getType();
987 return StructType::get(Context, EltTypes, Packed);
991 StructType *ConstantStruct::getTypeForElements(ArrayRef<Constant*> V,
994 "ConstantStruct::getTypeForElements cannot be called on empty list");
995 return getTypeForElements(V[0]->getContext(), V, Packed);
999 ConstantStruct::ConstantStruct(StructType *T, ArrayRef<Constant *> V)
1000 : Constant(T, ConstantStructVal,
1001 OperandTraits<ConstantStruct>::op_end(this) - V.size(),
1003 assert(V.size() == T->getNumElements() &&
1004 "Invalid initializer vector for constant structure");
1005 for (unsigned i = 0, e = V.size(); i != e; ++i)
1006 assert((T->isOpaque() || V[i]->getType() == T->getElementType(i)) &&
1007 "Initializer for struct element doesn't match struct element type!");
1008 std::copy(V.begin(), V.end(), op_begin());
1011 // ConstantStruct accessors.
1012 Constant *ConstantStruct::get(StructType *ST, ArrayRef<Constant*> V) {
1013 assert((ST->isOpaque() || ST->getNumElements() == V.size()) &&
1014 "Incorrect # elements specified to ConstantStruct::get");
1016 // Create a ConstantAggregateZero value if all elements are zeros.
1018 bool isUndef = false;
1021 isUndef = isa<UndefValue>(V[0]);
1022 isZero = V[0]->isNullValue();
1023 if (isUndef || isZero) {
1024 for (unsigned i = 0, e = V.size(); i != e; ++i) {
1025 if (!V[i]->isNullValue())
1027 if (!isa<UndefValue>(V[i]))
1033 return ConstantAggregateZero::get(ST);
1035 return UndefValue::get(ST);
1037 return ST->getContext().pImpl->StructConstants.getOrCreate(ST, V);
1040 Constant *ConstantStruct::get(StructType *T, ...) {
1042 SmallVector<Constant*, 8> Values;
1044 while (Constant *Val = va_arg(ap, llvm::Constant*))
1045 Values.push_back(Val);
1047 return get(T, Values);
1050 ConstantVector::ConstantVector(VectorType *T, ArrayRef<Constant *> V)
1051 : Constant(T, ConstantVectorVal,
1052 OperandTraits<ConstantVector>::op_end(this) - V.size(),
1054 for (size_t i = 0, e = V.size(); i != e; i++)
1055 assert(V[i]->getType() == T->getElementType() &&
1056 "Initializer for vector element doesn't match vector element type!");
1057 std::copy(V.begin(), V.end(), op_begin());
1060 // ConstantVector accessors.
1061 Constant *ConstantVector::get(ArrayRef<Constant*> V) {
1062 if (Constant *C = getImpl(V))
1064 VectorType *Ty = VectorType::get(V.front()->getType(), V.size());
1065 return Ty->getContext().pImpl->VectorConstants.getOrCreate(Ty, V);
1067 Constant *ConstantVector::getImpl(ArrayRef<Constant*> V) {
1068 assert(!V.empty() && "Vectors can't be empty");
1069 VectorType *T = VectorType::get(V.front()->getType(), V.size());
1071 // If this is an all-undef or all-zero vector, return a
1072 // ConstantAggregateZero or UndefValue.
1074 bool isZero = C->isNullValue();
1075 bool isUndef = isa<UndefValue>(C);
1077 if (isZero || isUndef) {
1078 for (unsigned i = 1, e = V.size(); i != e; ++i)
1080 isZero = isUndef = false;
1086 return ConstantAggregateZero::get(T);
1088 return UndefValue::get(T);
1090 // Check to see if all of the elements are ConstantFP or ConstantInt and if
1091 // the element type is compatible with ConstantDataVector. If so, use it.
1092 if (ConstantDataSequential::isElementTypeCompatible(C->getType())) {
1093 // We speculatively build the elements here even if it turns out that there
1094 // is a constantexpr or something else weird in the array, since it is so
1095 // uncommon for that to happen.
1096 if (ConstantInt *CI = dyn_cast<ConstantInt>(C)) {
1097 if (CI->getType()->isIntegerTy(8)) {
1098 SmallVector<uint8_t, 16> Elts;
1099 for (unsigned i = 0, e = V.size(); i != e; ++i)
1100 if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
1101 Elts.push_back(CI->getZExtValue());
1104 if (Elts.size() == V.size())
1105 return ConstantDataVector::get(C->getContext(), Elts);
1106 } else if (CI->getType()->isIntegerTy(16)) {
1107 SmallVector<uint16_t, 16> Elts;
1108 for (unsigned i = 0, e = V.size(); i != e; ++i)
1109 if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
1110 Elts.push_back(CI->getZExtValue());
1113 if (Elts.size() == V.size())
1114 return ConstantDataVector::get(C->getContext(), Elts);
1115 } else if (CI->getType()->isIntegerTy(32)) {
1116 SmallVector<uint32_t, 16> Elts;
1117 for (unsigned i = 0, e = V.size(); i != e; ++i)
1118 if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
1119 Elts.push_back(CI->getZExtValue());
1122 if (Elts.size() == V.size())
1123 return ConstantDataVector::get(C->getContext(), Elts);
1124 } else if (CI->getType()->isIntegerTy(64)) {
1125 SmallVector<uint64_t, 16> Elts;
1126 for (unsigned i = 0, e = V.size(); i != e; ++i)
1127 if (ConstantInt *CI = dyn_cast<ConstantInt>(V[i]))
1128 Elts.push_back(CI->getZExtValue());
1131 if (Elts.size() == V.size())
1132 return ConstantDataVector::get(C->getContext(), Elts);
1136 if (ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
1137 if (CFP->getType()->isFloatTy()) {
1138 SmallVector<uint32_t, 16> Elts;
1139 for (unsigned i = 0, e = V.size(); i != e; ++i)
1140 if (ConstantFP *CFP = dyn_cast<ConstantFP>(V[i]))
1142 CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
1145 if (Elts.size() == V.size())
1146 return ConstantDataVector::getFP(C->getContext(), Elts);
1147 } else if (CFP->getType()->isDoubleTy()) {
1148 SmallVector<uint64_t, 16> Elts;
1149 for (unsigned i = 0, e = V.size(); i != e; ++i)
1150 if (ConstantFP *CFP = dyn_cast<ConstantFP>(V[i]))
1152 CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
1155 if (Elts.size() == V.size())
1156 return ConstantDataVector::getFP(C->getContext(), Elts);
1161 // Otherwise, the element type isn't compatible with ConstantDataVector, or
1162 // the operand list constants a ConstantExpr or something else strange.
1166 Constant *ConstantVector::getSplat(unsigned NumElts, Constant *V) {
1167 // If this splat is compatible with ConstantDataVector, use it instead of
1169 if ((isa<ConstantFP>(V) || isa<ConstantInt>(V)) &&
1170 ConstantDataSequential::isElementTypeCompatible(V->getType()))
1171 return ConstantDataVector::getSplat(NumElts, V);
1173 SmallVector<Constant*, 32> Elts(NumElts, V);
1177 ConstantTokenNone *ConstantTokenNone::get(LLVMContext &Context) {
1178 LLVMContextImpl *pImpl = Context.pImpl;
1179 if (!pImpl->TheNoneToken)
1180 pImpl->TheNoneToken = new ConstantTokenNone(Context);
1181 return pImpl->TheNoneToken;
1184 /// Remove the constant from the constant table.
1185 void ConstantTokenNone::destroyConstantImpl() {
1186 llvm_unreachable("You can't ConstantTokenNone->destroyConstantImpl()!");
1189 // Utility function for determining if a ConstantExpr is a CastOp or not. This
1190 // can't be inline because we don't want to #include Instruction.h into
1192 bool ConstantExpr::isCast() const {
1193 return Instruction::isCast(getOpcode());
1196 bool ConstantExpr::isCompare() const {
1197 return getOpcode() == Instruction::ICmp || getOpcode() == Instruction::FCmp;
1200 bool ConstantExpr::isGEPWithNoNotionalOverIndexing() const {
1201 if (getOpcode() != Instruction::GetElementPtr) return false;
1203 gep_type_iterator GEPI = gep_type_begin(this), E = gep_type_end(this);
1204 User::const_op_iterator OI = std::next(this->op_begin());
1206 // Skip the first index, as it has no static limit.
1210 // The remaining indices must be compile-time known integers within the
1211 // bounds of the corresponding notional static array types.
1212 for (; GEPI != E; ++GEPI, ++OI) {
1213 ConstantInt *CI = dyn_cast<ConstantInt>(*OI);
1214 if (!CI) return false;
1215 if (ArrayType *ATy = dyn_cast<ArrayType>(*GEPI))
1216 if (CI->getValue().getActiveBits() > 64 ||
1217 CI->getZExtValue() >= ATy->getNumElements())
1221 // All the indices checked out.
1225 bool ConstantExpr::hasIndices() const {
1226 return getOpcode() == Instruction::ExtractValue ||
1227 getOpcode() == Instruction::InsertValue;
1230 ArrayRef<unsigned> ConstantExpr::getIndices() const {
1231 if (const ExtractValueConstantExpr *EVCE =
1232 dyn_cast<ExtractValueConstantExpr>(this))
1233 return EVCE->Indices;
1235 return cast<InsertValueConstantExpr>(this)->Indices;
1238 unsigned ConstantExpr::getPredicate() const {
1239 assert(isCompare());
1240 return ((const CompareConstantExpr*)this)->predicate;
1243 /// getWithOperandReplaced - Return a constant expression identical to this
1244 /// one, but with the specified operand set to the specified value.
1246 ConstantExpr::getWithOperandReplaced(unsigned OpNo, Constant *Op) const {
1247 assert(Op->getType() == getOperand(OpNo)->getType() &&
1248 "Replacing operand with value of different type!");
1249 if (getOperand(OpNo) == Op)
1250 return const_cast<ConstantExpr*>(this);
1252 SmallVector<Constant*, 8> NewOps;
1253 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
1254 NewOps.push_back(i == OpNo ? Op : getOperand(i));
1256 return getWithOperands(NewOps);
1259 /// getWithOperands - This returns the current constant expression with the
1260 /// operands replaced with the specified values. The specified array must
1261 /// have the same number of operands as our current one.
1262 Constant *ConstantExpr::getWithOperands(ArrayRef<Constant *> Ops, Type *Ty,
1263 bool OnlyIfReduced, Type *SrcTy) const {
1264 assert(Ops.size() == getNumOperands() && "Operand count mismatch!");
1266 // If no operands changed return self.
1267 if (Ty == getType() && std::equal(Ops.begin(), Ops.end(), op_begin()))
1268 return const_cast<ConstantExpr*>(this);
1270 Type *OnlyIfReducedTy = OnlyIfReduced ? Ty : nullptr;
1271 switch (getOpcode()) {
1272 case Instruction::Trunc:
1273 case Instruction::ZExt:
1274 case Instruction::SExt:
1275 case Instruction::FPTrunc:
1276 case Instruction::FPExt:
1277 case Instruction::UIToFP:
1278 case Instruction::SIToFP:
1279 case Instruction::FPToUI:
1280 case Instruction::FPToSI:
1281 case Instruction::PtrToInt:
1282 case Instruction::IntToPtr:
1283 case Instruction::BitCast:
1284 case Instruction::AddrSpaceCast:
1285 return ConstantExpr::getCast(getOpcode(), Ops[0], Ty, OnlyIfReduced);
1286 case Instruction::Select:
1287 return ConstantExpr::getSelect(Ops[0], Ops[1], Ops[2], OnlyIfReducedTy);
1288 case Instruction::InsertElement:
1289 return ConstantExpr::getInsertElement(Ops[0], Ops[1], Ops[2],
1291 case Instruction::ExtractElement:
1292 return ConstantExpr::getExtractElement(Ops[0], Ops[1], OnlyIfReducedTy);
1293 case Instruction::InsertValue:
1294 return ConstantExpr::getInsertValue(Ops[0], Ops[1], getIndices(),
1296 case Instruction::ExtractValue:
1297 return ConstantExpr::getExtractValue(Ops[0], getIndices(), OnlyIfReducedTy);
1298 case Instruction::ShuffleVector:
1299 return ConstantExpr::getShuffleVector(Ops[0], Ops[1], Ops[2],
1301 case Instruction::GetElementPtr: {
1302 auto *GEPO = cast<GEPOperator>(this);
1303 assert(SrcTy || (Ops[0]->getType() == getOperand(0)->getType()));
1304 return ConstantExpr::getGetElementPtr(
1305 SrcTy ? SrcTy : GEPO->getSourceElementType(), Ops[0], Ops.slice(1),
1306 GEPO->isInBounds(), OnlyIfReducedTy);
1308 case Instruction::ICmp:
1309 case Instruction::FCmp:
1310 return ConstantExpr::getCompare(getPredicate(), Ops[0], Ops[1],
1313 assert(getNumOperands() == 2 && "Must be binary operator?");
1314 return ConstantExpr::get(getOpcode(), Ops[0], Ops[1], SubclassOptionalData,
1320 //===----------------------------------------------------------------------===//
1321 // isValueValidForType implementations
1323 bool ConstantInt::isValueValidForType(Type *Ty, uint64_t Val) {
1324 unsigned NumBits = Ty->getIntegerBitWidth(); // assert okay
1325 if (Ty->isIntegerTy(1))
1326 return Val == 0 || Val == 1;
1328 return true; // always true, has to fit in largest type
1329 uint64_t Max = (1ll << NumBits) - 1;
1333 bool ConstantInt::isValueValidForType(Type *Ty, int64_t Val) {
1334 unsigned NumBits = Ty->getIntegerBitWidth();
1335 if (Ty->isIntegerTy(1))
1336 return Val == 0 || Val == 1 || Val == -1;
1338 return true; // always true, has to fit in largest type
1339 int64_t Min = -(1ll << (NumBits-1));
1340 int64_t Max = (1ll << (NumBits-1)) - 1;
1341 return (Val >= Min && Val <= Max);
1344 bool ConstantFP::isValueValidForType(Type *Ty, const APFloat& Val) {
1345 // convert modifies in place, so make a copy.
1346 APFloat Val2 = APFloat(Val);
1348 switch (Ty->getTypeID()) {
1350 return false; // These can't be represented as floating point!
1352 // FIXME rounding mode needs to be more flexible
1353 case Type::HalfTyID: {
1354 if (&Val2.getSemantics() == &APFloat::IEEEhalf)
1356 Val2.convert(APFloat::IEEEhalf, APFloat::rmNearestTiesToEven, &losesInfo);
1359 case Type::FloatTyID: {
1360 if (&Val2.getSemantics() == &APFloat::IEEEsingle)
1362 Val2.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, &losesInfo);
1365 case Type::DoubleTyID: {
1366 if (&Val2.getSemantics() == &APFloat::IEEEhalf ||
1367 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1368 &Val2.getSemantics() == &APFloat::IEEEdouble)
1370 Val2.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &losesInfo);
1373 case Type::X86_FP80TyID:
1374 return &Val2.getSemantics() == &APFloat::IEEEhalf ||
1375 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1376 &Val2.getSemantics() == &APFloat::IEEEdouble ||
1377 &Val2.getSemantics() == &APFloat::x87DoubleExtended;
1378 case Type::FP128TyID:
1379 return &Val2.getSemantics() == &APFloat::IEEEhalf ||
1380 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1381 &Val2.getSemantics() == &APFloat::IEEEdouble ||
1382 &Val2.getSemantics() == &APFloat::IEEEquad;
1383 case Type::PPC_FP128TyID:
1384 return &Val2.getSemantics() == &APFloat::IEEEhalf ||
1385 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1386 &Val2.getSemantics() == &APFloat::IEEEdouble ||
1387 &Val2.getSemantics() == &APFloat::PPCDoubleDouble;
1392 //===----------------------------------------------------------------------===//
1393 // Factory Function Implementation
1395 ConstantAggregateZero *ConstantAggregateZero::get(Type *Ty) {
1396 assert((Ty->isStructTy() || Ty->isArrayTy() || Ty->isVectorTy()) &&
1397 "Cannot create an aggregate zero of non-aggregate type!");
1399 ConstantAggregateZero *&Entry = Ty->getContext().pImpl->CAZConstants[Ty];
1401 Entry = new ConstantAggregateZero(Ty);
1406 /// destroyConstant - Remove the constant from the constant table.
1408 void ConstantAggregateZero::destroyConstantImpl() {
1409 getContext().pImpl->CAZConstants.erase(getType());
1412 /// destroyConstant - Remove the constant from the constant table...
1414 void ConstantArray::destroyConstantImpl() {
1415 getType()->getContext().pImpl->ArrayConstants.remove(this);
1419 //---- ConstantStruct::get() implementation...
1422 // destroyConstant - Remove the constant from the constant table...
1424 void ConstantStruct::destroyConstantImpl() {
1425 getType()->getContext().pImpl->StructConstants.remove(this);
1428 // destroyConstant - Remove the constant from the constant table...
1430 void ConstantVector::destroyConstantImpl() {
1431 getType()->getContext().pImpl->VectorConstants.remove(this);
1434 /// getSplatValue - If this is a splat vector constant, meaning that all of
1435 /// the elements have the same value, return that value. Otherwise return 0.
1436 Constant *Constant::getSplatValue() const {
1437 assert(this->getType()->isVectorTy() && "Only valid for vectors!");
1438 if (isa<ConstantAggregateZero>(this))
1439 return getNullValue(this->getType()->getVectorElementType());
1440 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
1441 return CV->getSplatValue();
1442 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
1443 return CV->getSplatValue();
1447 /// getSplatValue - If this is a splat constant, where all of the
1448 /// elements have the same value, return that value. Otherwise return null.
1449 Constant *ConstantVector::getSplatValue() const {
1450 // Check out first element.
1451 Constant *Elt = getOperand(0);
1452 // Then make sure all remaining elements point to the same value.
1453 for (unsigned I = 1, E = getNumOperands(); I < E; ++I)
1454 if (getOperand(I) != Elt)
1459 /// If C is a constant integer then return its value, otherwise C must be a
1460 /// vector of constant integers, all equal, and the common value is returned.
1461 const APInt &Constant::getUniqueInteger() const {
1462 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
1463 return CI->getValue();
1464 assert(this->getSplatValue() && "Doesn't contain a unique integer!");
1465 const Constant *C = this->getAggregateElement(0U);
1466 assert(C && isa<ConstantInt>(C) && "Not a vector of numbers!");
1467 return cast<ConstantInt>(C)->getValue();
1470 //---- ConstantPointerNull::get() implementation.
1473 ConstantPointerNull *ConstantPointerNull::get(PointerType *Ty) {
1474 ConstantPointerNull *&Entry = Ty->getContext().pImpl->CPNConstants[Ty];
1476 Entry = new ConstantPointerNull(Ty);
1481 // destroyConstant - Remove the constant from the constant table...
1483 void ConstantPointerNull::destroyConstantImpl() {
1484 getContext().pImpl->CPNConstants.erase(getType());
1488 //---- UndefValue::get() implementation.
1491 UndefValue *UndefValue::get(Type *Ty) {
1492 UndefValue *&Entry = Ty->getContext().pImpl->UVConstants[Ty];
1494 Entry = new UndefValue(Ty);
1499 // destroyConstant - Remove the constant from the constant table.
1501 void UndefValue::destroyConstantImpl() {
1502 // Free the constant and any dangling references to it.
1503 getContext().pImpl->UVConstants.erase(getType());
1506 //---- BlockAddress::get() implementation.
1509 BlockAddress *BlockAddress::get(BasicBlock *BB) {
1510 assert(BB->getParent() && "Block must have a parent");
1511 return get(BB->getParent(), BB);
1514 BlockAddress *BlockAddress::get(Function *F, BasicBlock *BB) {
1516 F->getContext().pImpl->BlockAddresses[std::make_pair(F, BB)];
1518 BA = new BlockAddress(F, BB);
1520 assert(BA->getFunction() == F && "Basic block moved between functions");
1524 BlockAddress::BlockAddress(Function *F, BasicBlock *BB)
1525 : Constant(Type::getInt8PtrTy(F->getContext()), Value::BlockAddressVal,
1529 BB->AdjustBlockAddressRefCount(1);
1532 BlockAddress *BlockAddress::lookup(const BasicBlock *BB) {
1533 if (!BB->hasAddressTaken())
1536 const Function *F = BB->getParent();
1537 assert(F && "Block must have a parent");
1539 F->getContext().pImpl->BlockAddresses.lookup(std::make_pair(F, BB));
1540 assert(BA && "Refcount and block address map disagree!");
1544 // destroyConstant - Remove the constant from the constant table.
1546 void BlockAddress::destroyConstantImpl() {
1547 getFunction()->getType()->getContext().pImpl
1548 ->BlockAddresses.erase(std::make_pair(getFunction(), getBasicBlock()));
1549 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1552 Value *BlockAddress::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
1553 // This could be replacing either the Basic Block or the Function. In either
1554 // case, we have to remove the map entry.
1555 Function *NewF = getFunction();
1556 BasicBlock *NewBB = getBasicBlock();
1559 NewF = cast<Function>(To->stripPointerCasts());
1561 NewBB = cast<BasicBlock>(To);
1563 // See if the 'new' entry already exists, if not, just update this in place
1564 // and return early.
1565 BlockAddress *&NewBA =
1566 getContext().pImpl->BlockAddresses[std::make_pair(NewF, NewBB)];
1570 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1572 // Remove the old entry, this can't cause the map to rehash (just a
1573 // tombstone will get added).
1574 getContext().pImpl->BlockAddresses.erase(std::make_pair(getFunction(),
1577 setOperand(0, NewF);
1578 setOperand(1, NewBB);
1579 getBasicBlock()->AdjustBlockAddressRefCount(1);
1581 // If we just want to keep the existing value, then return null.
1582 // Callers know that this means we shouldn't delete this value.
1586 //---- ConstantExpr::get() implementations.
1589 /// This is a utility function to handle folding of casts and lookup of the
1590 /// cast in the ExprConstants map. It is used by the various get* methods below.
1591 static Constant *getFoldedCast(Instruction::CastOps opc, Constant *C, Type *Ty,
1592 bool OnlyIfReduced = false) {
1593 assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
1594 // Fold a few common cases
1595 if (Constant *FC = ConstantFoldCastInstruction(opc, C, Ty))
1601 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
1603 // Look up the constant in the table first to ensure uniqueness.
1604 ConstantExprKeyType Key(opc, C);
1606 return pImpl->ExprConstants.getOrCreate(Ty, Key);
1609 Constant *ConstantExpr::getCast(unsigned oc, Constant *C, Type *Ty,
1610 bool OnlyIfReduced) {
1611 Instruction::CastOps opc = Instruction::CastOps(oc);
1612 assert(Instruction::isCast(opc) && "opcode out of range");
1613 assert(C && Ty && "Null arguments to getCast");
1614 assert(CastInst::castIsValid(opc, C, Ty) && "Invalid constantexpr cast!");
1618 llvm_unreachable("Invalid cast opcode");
1619 case Instruction::Trunc:
1620 return getTrunc(C, Ty, OnlyIfReduced);
1621 case Instruction::ZExt:
1622 return getZExt(C, Ty, OnlyIfReduced);
1623 case Instruction::SExt:
1624 return getSExt(C, Ty, OnlyIfReduced);
1625 case Instruction::FPTrunc:
1626 return getFPTrunc(C, Ty, OnlyIfReduced);
1627 case Instruction::FPExt:
1628 return getFPExtend(C, Ty, OnlyIfReduced);
1629 case Instruction::UIToFP:
1630 return getUIToFP(C, Ty, OnlyIfReduced);
1631 case Instruction::SIToFP:
1632 return getSIToFP(C, Ty, OnlyIfReduced);
1633 case Instruction::FPToUI:
1634 return getFPToUI(C, Ty, OnlyIfReduced);
1635 case Instruction::FPToSI:
1636 return getFPToSI(C, Ty, OnlyIfReduced);
1637 case Instruction::PtrToInt:
1638 return getPtrToInt(C, Ty, OnlyIfReduced);
1639 case Instruction::IntToPtr:
1640 return getIntToPtr(C, Ty, OnlyIfReduced);
1641 case Instruction::BitCast:
1642 return getBitCast(C, Ty, OnlyIfReduced);
1643 case Instruction::AddrSpaceCast:
1644 return getAddrSpaceCast(C, Ty, OnlyIfReduced);
1648 Constant *ConstantExpr::getZExtOrBitCast(Constant *C, Type *Ty) {
1649 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1650 return getBitCast(C, Ty);
1651 return getZExt(C, Ty);
1654 Constant *ConstantExpr::getSExtOrBitCast(Constant *C, Type *Ty) {
1655 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1656 return getBitCast(C, Ty);
1657 return getSExt(C, Ty);
1660 Constant *ConstantExpr::getTruncOrBitCast(Constant *C, Type *Ty) {
1661 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1662 return getBitCast(C, Ty);
1663 return getTrunc(C, Ty);
1666 Constant *ConstantExpr::getPointerCast(Constant *S, Type *Ty) {
1667 assert(S->getType()->isPtrOrPtrVectorTy() && "Invalid cast");
1668 assert((Ty->isIntOrIntVectorTy() || Ty->isPtrOrPtrVectorTy()) &&
1671 if (Ty->isIntOrIntVectorTy())
1672 return getPtrToInt(S, Ty);
1674 unsigned SrcAS = S->getType()->getPointerAddressSpace();
1675 if (Ty->isPtrOrPtrVectorTy() && SrcAS != Ty->getPointerAddressSpace())
1676 return getAddrSpaceCast(S, Ty);
1678 return getBitCast(S, Ty);
1681 Constant *ConstantExpr::getPointerBitCastOrAddrSpaceCast(Constant *S,
1683 assert(S->getType()->isPtrOrPtrVectorTy() && "Invalid cast");
1684 assert(Ty->isPtrOrPtrVectorTy() && "Invalid cast");
1686 if (S->getType()->getPointerAddressSpace() != Ty->getPointerAddressSpace())
1687 return getAddrSpaceCast(S, Ty);
1689 return getBitCast(S, Ty);
1692 Constant *ConstantExpr::getIntegerCast(Constant *C, Type *Ty,
1694 assert(C->getType()->isIntOrIntVectorTy() &&
1695 Ty->isIntOrIntVectorTy() && "Invalid cast");
1696 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1697 unsigned DstBits = Ty->getScalarSizeInBits();
1698 Instruction::CastOps opcode =
1699 (SrcBits == DstBits ? Instruction::BitCast :
1700 (SrcBits > DstBits ? Instruction::Trunc :
1701 (isSigned ? Instruction::SExt : Instruction::ZExt)));
1702 return getCast(opcode, C, Ty);
1705 Constant *ConstantExpr::getFPCast(Constant *C, Type *Ty) {
1706 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1708 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1709 unsigned DstBits = Ty->getScalarSizeInBits();
1710 if (SrcBits == DstBits)
1711 return C; // Avoid a useless cast
1712 Instruction::CastOps opcode =
1713 (SrcBits > DstBits ? Instruction::FPTrunc : Instruction::FPExt);
1714 return getCast(opcode, C, Ty);
1717 Constant *ConstantExpr::getTrunc(Constant *C, Type *Ty, bool OnlyIfReduced) {
1719 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1720 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1722 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1723 assert(C->getType()->isIntOrIntVectorTy() && "Trunc operand must be integer");
1724 assert(Ty->isIntOrIntVectorTy() && "Trunc produces only integral");
1725 assert(C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1726 "SrcTy must be larger than DestTy for Trunc!");
1728 return getFoldedCast(Instruction::Trunc, C, Ty, OnlyIfReduced);
1731 Constant *ConstantExpr::getSExt(Constant *C, Type *Ty, bool OnlyIfReduced) {
1733 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1734 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1736 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1737 assert(C->getType()->isIntOrIntVectorTy() && "SExt operand must be integral");
1738 assert(Ty->isIntOrIntVectorTy() && "SExt produces only integer");
1739 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1740 "SrcTy must be smaller than DestTy for SExt!");
1742 return getFoldedCast(Instruction::SExt, C, Ty, OnlyIfReduced);
1745 Constant *ConstantExpr::getZExt(Constant *C, Type *Ty, bool OnlyIfReduced) {
1747 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1748 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1750 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1751 assert(C->getType()->isIntOrIntVectorTy() && "ZEXt operand must be integral");
1752 assert(Ty->isIntOrIntVectorTy() && "ZExt produces only integer");
1753 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1754 "SrcTy must be smaller than DestTy for ZExt!");
1756 return getFoldedCast(Instruction::ZExt, C, Ty, OnlyIfReduced);
1759 Constant *ConstantExpr::getFPTrunc(Constant *C, Type *Ty, bool OnlyIfReduced) {
1761 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1762 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1764 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1765 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1766 C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1767 "This is an illegal floating point truncation!");
1768 return getFoldedCast(Instruction::FPTrunc, C, Ty, OnlyIfReduced);
1771 Constant *ConstantExpr::getFPExtend(Constant *C, Type *Ty, bool OnlyIfReduced) {
1773 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1774 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1776 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1777 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1778 C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1779 "This is an illegal floating point extension!");
1780 return getFoldedCast(Instruction::FPExt, C, Ty, OnlyIfReduced);
1783 Constant *ConstantExpr::getUIToFP(Constant *C, Type *Ty, bool OnlyIfReduced) {
1785 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1786 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1788 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1789 assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1790 "This is an illegal uint to floating point cast!");
1791 return getFoldedCast(Instruction::UIToFP, C, Ty, OnlyIfReduced);
1794 Constant *ConstantExpr::getSIToFP(Constant *C, Type *Ty, bool OnlyIfReduced) {
1796 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1797 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1799 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1800 assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1801 "This is an illegal sint to floating point cast!");
1802 return getFoldedCast(Instruction::SIToFP, C, Ty, OnlyIfReduced);
1805 Constant *ConstantExpr::getFPToUI(Constant *C, Type *Ty, bool OnlyIfReduced) {
1807 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1808 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1810 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1811 assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1812 "This is an illegal floating point to uint cast!");
1813 return getFoldedCast(Instruction::FPToUI, C, Ty, OnlyIfReduced);
1816 Constant *ConstantExpr::getFPToSI(Constant *C, Type *Ty, bool OnlyIfReduced) {
1818 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1819 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1821 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1822 assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1823 "This is an illegal floating point to sint cast!");
1824 return getFoldedCast(Instruction::FPToSI, C, Ty, OnlyIfReduced);
1827 Constant *ConstantExpr::getPtrToInt(Constant *C, Type *DstTy,
1828 bool OnlyIfReduced) {
1829 assert(C->getType()->getScalarType()->isPointerTy() &&
1830 "PtrToInt source must be pointer or pointer vector");
1831 assert(DstTy->getScalarType()->isIntegerTy() &&
1832 "PtrToInt destination must be integer or integer vector");
1833 assert(isa<VectorType>(C->getType()) == isa<VectorType>(DstTy));
1834 if (isa<VectorType>(C->getType()))
1835 assert(C->getType()->getVectorNumElements()==DstTy->getVectorNumElements()&&
1836 "Invalid cast between a different number of vector elements");
1837 return getFoldedCast(Instruction::PtrToInt, C, DstTy, OnlyIfReduced);
1840 Constant *ConstantExpr::getIntToPtr(Constant *C, Type *DstTy,
1841 bool OnlyIfReduced) {
1842 assert(C->getType()->getScalarType()->isIntegerTy() &&
1843 "IntToPtr source must be integer or integer vector");
1844 assert(DstTy->getScalarType()->isPointerTy() &&
1845 "IntToPtr destination must be a pointer or pointer vector");
1846 assert(isa<VectorType>(C->getType()) == isa<VectorType>(DstTy));
1847 if (isa<VectorType>(C->getType()))
1848 assert(C->getType()->getVectorNumElements()==DstTy->getVectorNumElements()&&
1849 "Invalid cast between a different number of vector elements");
1850 return getFoldedCast(Instruction::IntToPtr, C, DstTy, OnlyIfReduced);
1853 Constant *ConstantExpr::getBitCast(Constant *C, Type *DstTy,
1854 bool OnlyIfReduced) {
1855 assert(CastInst::castIsValid(Instruction::BitCast, C, DstTy) &&
1856 "Invalid constantexpr bitcast!");
1858 // It is common to ask for a bitcast of a value to its own type, handle this
1860 if (C->getType() == DstTy) return C;
1862 return getFoldedCast(Instruction::BitCast, C, DstTy, OnlyIfReduced);
1865 Constant *ConstantExpr::getAddrSpaceCast(Constant *C, Type *DstTy,
1866 bool OnlyIfReduced) {
1867 assert(CastInst::castIsValid(Instruction::AddrSpaceCast, C, DstTy) &&
1868 "Invalid constantexpr addrspacecast!");
1870 // Canonicalize addrspacecasts between different pointer types by first
1871 // bitcasting the pointer type and then converting the address space.
1872 PointerType *SrcScalarTy = cast<PointerType>(C->getType()->getScalarType());
1873 PointerType *DstScalarTy = cast<PointerType>(DstTy->getScalarType());
1874 Type *DstElemTy = DstScalarTy->getElementType();
1875 if (SrcScalarTy->getElementType() != DstElemTy) {
1876 Type *MidTy = PointerType::get(DstElemTy, SrcScalarTy->getAddressSpace());
1877 if (VectorType *VT = dyn_cast<VectorType>(DstTy)) {
1878 // Handle vectors of pointers.
1879 MidTy = VectorType::get(MidTy, VT->getNumElements());
1881 C = getBitCast(C, MidTy);
1883 return getFoldedCast(Instruction::AddrSpaceCast, C, DstTy, OnlyIfReduced);
1886 Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2,
1887 unsigned Flags, Type *OnlyIfReducedTy) {
1888 // Check the operands for consistency first.
1889 assert(Opcode >= Instruction::BinaryOpsBegin &&
1890 Opcode < Instruction::BinaryOpsEnd &&
1891 "Invalid opcode in binary constant expression");
1892 assert(C1->getType() == C2->getType() &&
1893 "Operand types in binary constant expression should match");
1897 case Instruction::Add:
1898 case Instruction::Sub:
1899 case Instruction::Mul:
1900 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1901 assert(C1->getType()->isIntOrIntVectorTy() &&
1902 "Tried to create an integer operation on a non-integer type!");
1904 case Instruction::FAdd:
1905 case Instruction::FSub:
1906 case Instruction::FMul:
1907 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1908 assert(C1->getType()->isFPOrFPVectorTy() &&
1909 "Tried to create a floating-point operation on a "
1910 "non-floating-point type!");
1912 case Instruction::UDiv:
1913 case Instruction::SDiv:
1914 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1915 assert(C1->getType()->isIntOrIntVectorTy() &&
1916 "Tried to create an arithmetic operation on a non-arithmetic type!");
1918 case Instruction::FDiv:
1919 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1920 assert(C1->getType()->isFPOrFPVectorTy() &&
1921 "Tried to create an arithmetic operation on a non-arithmetic type!");
1923 case Instruction::URem:
1924 case Instruction::SRem:
1925 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1926 assert(C1->getType()->isIntOrIntVectorTy() &&
1927 "Tried to create an arithmetic operation on a non-arithmetic type!");
1929 case Instruction::FRem:
1930 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1931 assert(C1->getType()->isFPOrFPVectorTy() &&
1932 "Tried to create an arithmetic operation on a non-arithmetic type!");
1934 case Instruction::And:
1935 case Instruction::Or:
1936 case Instruction::Xor:
1937 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1938 assert(C1->getType()->isIntOrIntVectorTy() &&
1939 "Tried to create a logical operation on a non-integral type!");
1941 case Instruction::Shl:
1942 case Instruction::LShr:
1943 case Instruction::AShr:
1944 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1945 assert(C1->getType()->isIntOrIntVectorTy() &&
1946 "Tried to create a shift operation on a non-integer type!");
1953 if (Constant *FC = ConstantFoldBinaryInstruction(Opcode, C1, C2))
1954 return FC; // Fold a few common cases.
1956 if (OnlyIfReducedTy == C1->getType())
1959 Constant *ArgVec[] = { C1, C2 };
1960 ConstantExprKeyType Key(Opcode, ArgVec, 0, Flags);
1962 LLVMContextImpl *pImpl = C1->getContext().pImpl;
1963 return pImpl->ExprConstants.getOrCreate(C1->getType(), Key);
1966 Constant *ConstantExpr::getSizeOf(Type* Ty) {
1967 // sizeof is implemented as: (i64) gep (Ty*)null, 1
1968 // Note that a non-inbounds gep is used, as null isn't within any object.
1969 Constant *GEPIdx = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1970 Constant *GEP = getGetElementPtr(
1971 Ty, Constant::getNullValue(PointerType::getUnqual(Ty)), GEPIdx);
1972 return getPtrToInt(GEP,
1973 Type::getInt64Ty(Ty->getContext()));
1976 Constant *ConstantExpr::getAlignOf(Type* Ty) {
1977 // alignof is implemented as: (i64) gep ({i1,Ty}*)null, 0, 1
1978 // Note that a non-inbounds gep is used, as null isn't within any object.
1980 StructType::get(Type::getInt1Ty(Ty->getContext()), Ty, nullptr);
1981 Constant *NullPtr = Constant::getNullValue(AligningTy->getPointerTo(0));
1982 Constant *Zero = ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0);
1983 Constant *One = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1984 Constant *Indices[2] = { Zero, One };
1985 Constant *GEP = getGetElementPtr(AligningTy, NullPtr, Indices);
1986 return getPtrToInt(GEP,
1987 Type::getInt64Ty(Ty->getContext()));
1990 Constant *ConstantExpr::getOffsetOf(StructType* STy, unsigned FieldNo) {
1991 return getOffsetOf(STy, ConstantInt::get(Type::getInt32Ty(STy->getContext()),
1995 Constant *ConstantExpr::getOffsetOf(Type* Ty, Constant *FieldNo) {
1996 // offsetof is implemented as: (i64) gep (Ty*)null, 0, FieldNo
1997 // Note that a non-inbounds gep is used, as null isn't within any object.
1998 Constant *GEPIdx[] = {
1999 ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0),
2002 Constant *GEP = getGetElementPtr(
2003 Ty, Constant::getNullValue(PointerType::getUnqual(Ty)), GEPIdx);
2004 return getPtrToInt(GEP,
2005 Type::getInt64Ty(Ty->getContext()));
2008 Constant *ConstantExpr::getCompare(unsigned short Predicate, Constant *C1,
2009 Constant *C2, bool OnlyIfReduced) {
2010 assert(C1->getType() == C2->getType() && "Op types should be identical!");
2012 switch (Predicate) {
2013 default: llvm_unreachable("Invalid CmpInst predicate");
2014 case CmpInst::FCMP_FALSE: case CmpInst::FCMP_OEQ: case CmpInst::FCMP_OGT:
2015 case CmpInst::FCMP_OGE: case CmpInst::FCMP_OLT: case CmpInst::FCMP_OLE:
2016 case CmpInst::FCMP_ONE: case CmpInst::FCMP_ORD: case CmpInst::FCMP_UNO:
2017 case CmpInst::FCMP_UEQ: case CmpInst::FCMP_UGT: case CmpInst::FCMP_UGE:
2018 case CmpInst::FCMP_ULT: case CmpInst::FCMP_ULE: case CmpInst::FCMP_UNE:
2019 case CmpInst::FCMP_TRUE:
2020 return getFCmp(Predicate, C1, C2, OnlyIfReduced);
2022 case CmpInst::ICMP_EQ: case CmpInst::ICMP_NE: case CmpInst::ICMP_UGT:
2023 case CmpInst::ICMP_UGE: case CmpInst::ICMP_ULT: case CmpInst::ICMP_ULE:
2024 case CmpInst::ICMP_SGT: case CmpInst::ICMP_SGE: case CmpInst::ICMP_SLT:
2025 case CmpInst::ICMP_SLE:
2026 return getICmp(Predicate, C1, C2, OnlyIfReduced);
2030 Constant *ConstantExpr::getSelect(Constant *C, Constant *V1, Constant *V2,
2031 Type *OnlyIfReducedTy) {
2032 assert(!SelectInst::areInvalidOperands(C, V1, V2)&&"Invalid select operands");
2034 if (Constant *SC = ConstantFoldSelectInstruction(C, V1, V2))
2035 return SC; // Fold common cases
2037 if (OnlyIfReducedTy == V1->getType())
2040 Constant *ArgVec[] = { C, V1, V2 };
2041 ConstantExprKeyType Key(Instruction::Select, ArgVec);
2043 LLVMContextImpl *pImpl = C->getContext().pImpl;
2044 return pImpl->ExprConstants.getOrCreate(V1->getType(), Key);
2047 Constant *ConstantExpr::getGetElementPtr(Type *Ty, Constant *C,
2048 ArrayRef<Value *> Idxs, bool InBounds,
2049 Type *OnlyIfReducedTy) {
2051 Ty = cast<PointerType>(C->getType()->getScalarType())->getElementType();
2055 cast<PointerType>(C->getType()->getScalarType())->getContainedType(0u));
2057 if (Constant *FC = ConstantFoldGetElementPtr(Ty, C, InBounds, Idxs))
2058 return FC; // Fold a few common cases.
2060 // Get the result type of the getelementptr!
2061 Type *DestTy = GetElementPtrInst::getIndexedType(Ty, Idxs);
2062 assert(DestTy && "GEP indices invalid!");
2063 unsigned AS = C->getType()->getPointerAddressSpace();
2064 Type *ReqTy = DestTy->getPointerTo(AS);
2065 if (VectorType *VecTy = dyn_cast<VectorType>(C->getType()))
2066 ReqTy = VectorType::get(ReqTy, VecTy->getNumElements());
2068 if (OnlyIfReducedTy == ReqTy)
2071 // Look up the constant in the table first to ensure uniqueness
2072 std::vector<Constant*> ArgVec;
2073 ArgVec.reserve(1 + Idxs.size());
2074 ArgVec.push_back(C);
2075 for (unsigned i = 0, e = Idxs.size(); i != e; ++i) {
2076 assert(Idxs[i]->getType()->isVectorTy() == ReqTy->isVectorTy() &&
2077 "getelementptr index type missmatch");
2078 assert((!Idxs[i]->getType()->isVectorTy() ||
2079 ReqTy->getVectorNumElements() ==
2080 Idxs[i]->getType()->getVectorNumElements()) &&
2081 "getelementptr index type missmatch");
2082 ArgVec.push_back(cast<Constant>(Idxs[i]));
2084 const ConstantExprKeyType Key(Instruction::GetElementPtr, ArgVec, 0,
2085 InBounds ? GEPOperator::IsInBounds : 0, None,
2088 LLVMContextImpl *pImpl = C->getContext().pImpl;
2089 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2092 Constant *ConstantExpr::getICmp(unsigned short pred, Constant *LHS,
2093 Constant *RHS, bool OnlyIfReduced) {
2094 assert(LHS->getType() == RHS->getType());
2095 assert(pred >= ICmpInst::FIRST_ICMP_PREDICATE &&
2096 pred <= ICmpInst::LAST_ICMP_PREDICATE && "Invalid ICmp Predicate");
2098 if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
2099 return FC; // Fold a few common cases...
2104 // Look up the constant in the table first to ensure uniqueness
2105 Constant *ArgVec[] = { LHS, RHS };
2106 // Get the key type with both the opcode and predicate
2107 const ConstantExprKeyType Key(Instruction::ICmp, ArgVec, pred);
2109 Type *ResultTy = Type::getInt1Ty(LHS->getContext());
2110 if (VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
2111 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
2113 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
2114 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
2117 Constant *ConstantExpr::getFCmp(unsigned short pred, Constant *LHS,
2118 Constant *RHS, bool OnlyIfReduced) {
2119 assert(LHS->getType() == RHS->getType());
2120 assert(pred <= FCmpInst::LAST_FCMP_PREDICATE && "Invalid FCmp Predicate");
2122 if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
2123 return FC; // Fold a few common cases...
2128 // Look up the constant in the table first to ensure uniqueness
2129 Constant *ArgVec[] = { LHS, RHS };
2130 // Get the key type with both the opcode and predicate
2131 const ConstantExprKeyType Key(Instruction::FCmp, ArgVec, pred);
2133 Type *ResultTy = Type::getInt1Ty(LHS->getContext());
2134 if (VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
2135 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
2137 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
2138 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
2141 Constant *ConstantExpr::getExtractElement(Constant *Val, Constant *Idx,
2142 Type *OnlyIfReducedTy) {
2143 assert(Val->getType()->isVectorTy() &&
2144 "Tried to create extractelement operation on non-vector type!");
2145 assert(Idx->getType()->isIntegerTy() &&
2146 "Extractelement index must be an integer type!");
2148 if (Constant *FC = ConstantFoldExtractElementInstruction(Val, Idx))
2149 return FC; // Fold a few common cases.
2151 Type *ReqTy = Val->getType()->getVectorElementType();
2152 if (OnlyIfReducedTy == ReqTy)
2155 // Look up the constant in the table first to ensure uniqueness
2156 Constant *ArgVec[] = { Val, Idx };
2157 const ConstantExprKeyType Key(Instruction::ExtractElement, ArgVec);
2159 LLVMContextImpl *pImpl = Val->getContext().pImpl;
2160 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2163 Constant *ConstantExpr::getInsertElement(Constant *Val, Constant *Elt,
2164 Constant *Idx, Type *OnlyIfReducedTy) {
2165 assert(Val->getType()->isVectorTy() &&
2166 "Tried to create insertelement operation on non-vector type!");
2167 assert(Elt->getType() == Val->getType()->getVectorElementType() &&
2168 "Insertelement types must match!");
2169 assert(Idx->getType()->isIntegerTy() &&
2170 "Insertelement index must be i32 type!");
2172 if (Constant *FC = ConstantFoldInsertElementInstruction(Val, Elt, Idx))
2173 return FC; // Fold a few common cases.
2175 if (OnlyIfReducedTy == Val->getType())
2178 // Look up the constant in the table first to ensure uniqueness
2179 Constant *ArgVec[] = { Val, Elt, Idx };
2180 const ConstantExprKeyType Key(Instruction::InsertElement, ArgVec);
2182 LLVMContextImpl *pImpl = Val->getContext().pImpl;
2183 return pImpl->ExprConstants.getOrCreate(Val->getType(), Key);
2186 Constant *ConstantExpr::getShuffleVector(Constant *V1, Constant *V2,
2187 Constant *Mask, Type *OnlyIfReducedTy) {
2188 assert(ShuffleVectorInst::isValidOperands(V1, V2, Mask) &&
2189 "Invalid shuffle vector constant expr operands!");
2191 if (Constant *FC = ConstantFoldShuffleVectorInstruction(V1, V2, Mask))
2192 return FC; // Fold a few common cases.
2194 unsigned NElts = Mask->getType()->getVectorNumElements();
2195 Type *EltTy = V1->getType()->getVectorElementType();
2196 Type *ShufTy = VectorType::get(EltTy, NElts);
2198 if (OnlyIfReducedTy == ShufTy)
2201 // Look up the constant in the table first to ensure uniqueness
2202 Constant *ArgVec[] = { V1, V2, Mask };
2203 const ConstantExprKeyType Key(Instruction::ShuffleVector, ArgVec);
2205 LLVMContextImpl *pImpl = ShufTy->getContext().pImpl;
2206 return pImpl->ExprConstants.getOrCreate(ShufTy, Key);
2209 Constant *ConstantExpr::getInsertValue(Constant *Agg, Constant *Val,
2210 ArrayRef<unsigned> Idxs,
2211 Type *OnlyIfReducedTy) {
2212 assert(Agg->getType()->isFirstClassType() &&
2213 "Non-first-class type for constant insertvalue expression");
2215 assert(ExtractValueInst::getIndexedType(Agg->getType(),
2216 Idxs) == Val->getType() &&
2217 "insertvalue indices invalid!");
2218 Type *ReqTy = Val->getType();
2220 if (Constant *FC = ConstantFoldInsertValueInstruction(Agg, Val, Idxs))
2223 if (OnlyIfReducedTy == ReqTy)
2226 Constant *ArgVec[] = { Agg, Val };
2227 const ConstantExprKeyType Key(Instruction::InsertValue, ArgVec, 0, 0, Idxs);
2229 LLVMContextImpl *pImpl = Agg->getContext().pImpl;
2230 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2233 Constant *ConstantExpr::getExtractValue(Constant *Agg, ArrayRef<unsigned> Idxs,
2234 Type *OnlyIfReducedTy) {
2235 assert(Agg->getType()->isFirstClassType() &&
2236 "Tried to create extractelement operation on non-first-class type!");
2238 Type *ReqTy = ExtractValueInst::getIndexedType(Agg->getType(), Idxs);
2240 assert(ReqTy && "extractvalue indices invalid!");
2242 assert(Agg->getType()->isFirstClassType() &&
2243 "Non-first-class type for constant extractvalue expression");
2244 if (Constant *FC = ConstantFoldExtractValueInstruction(Agg, Idxs))
2247 if (OnlyIfReducedTy == ReqTy)
2250 Constant *ArgVec[] = { Agg };
2251 const ConstantExprKeyType Key(Instruction::ExtractValue, ArgVec, 0, 0, Idxs);
2253 LLVMContextImpl *pImpl = Agg->getContext().pImpl;
2254 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2257 Constant *ConstantExpr::getNeg(Constant *C, bool HasNUW, bool HasNSW) {
2258 assert(C->getType()->isIntOrIntVectorTy() &&
2259 "Cannot NEG a nonintegral value!");
2260 return getSub(ConstantFP::getZeroValueForNegation(C->getType()),
2264 Constant *ConstantExpr::getFNeg(Constant *C) {
2265 assert(C->getType()->isFPOrFPVectorTy() &&
2266 "Cannot FNEG a non-floating-point value!");
2267 return getFSub(ConstantFP::getZeroValueForNegation(C->getType()), C);
2270 Constant *ConstantExpr::getNot(Constant *C) {
2271 assert(C->getType()->isIntOrIntVectorTy() &&
2272 "Cannot NOT a nonintegral value!");
2273 return get(Instruction::Xor, C, Constant::getAllOnesValue(C->getType()));
2276 Constant *ConstantExpr::getAdd(Constant *C1, Constant *C2,
2277 bool HasNUW, bool HasNSW) {
2278 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2279 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2280 return get(Instruction::Add, C1, C2, Flags);
2283 Constant *ConstantExpr::getFAdd(Constant *C1, Constant *C2) {
2284 return get(Instruction::FAdd, C1, C2);
2287 Constant *ConstantExpr::getSub(Constant *C1, Constant *C2,
2288 bool HasNUW, bool HasNSW) {
2289 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2290 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2291 return get(Instruction::Sub, C1, C2, Flags);
2294 Constant *ConstantExpr::getFSub(Constant *C1, Constant *C2) {
2295 return get(Instruction::FSub, C1, C2);
2298 Constant *ConstantExpr::getMul(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::Mul, C1, C2, Flags);
2305 Constant *ConstantExpr::getFMul(Constant *C1, Constant *C2) {
2306 return get(Instruction::FMul, C1, C2);
2309 Constant *ConstantExpr::getUDiv(Constant *C1, Constant *C2, bool isExact) {
2310 return get(Instruction::UDiv, C1, C2,
2311 isExact ? PossiblyExactOperator::IsExact : 0);
2314 Constant *ConstantExpr::getSDiv(Constant *C1, Constant *C2, bool isExact) {
2315 return get(Instruction::SDiv, C1, C2,
2316 isExact ? PossiblyExactOperator::IsExact : 0);
2319 Constant *ConstantExpr::getFDiv(Constant *C1, Constant *C2) {
2320 return get(Instruction::FDiv, C1, C2);
2323 Constant *ConstantExpr::getURem(Constant *C1, Constant *C2) {
2324 return get(Instruction::URem, C1, C2);
2327 Constant *ConstantExpr::getSRem(Constant *C1, Constant *C2) {
2328 return get(Instruction::SRem, C1, C2);
2331 Constant *ConstantExpr::getFRem(Constant *C1, Constant *C2) {
2332 return get(Instruction::FRem, C1, C2);
2335 Constant *ConstantExpr::getAnd(Constant *C1, Constant *C2) {
2336 return get(Instruction::And, C1, C2);
2339 Constant *ConstantExpr::getOr(Constant *C1, Constant *C2) {
2340 return get(Instruction::Or, C1, C2);
2343 Constant *ConstantExpr::getXor(Constant *C1, Constant *C2) {
2344 return get(Instruction::Xor, C1, C2);
2347 Constant *ConstantExpr::getShl(Constant *C1, Constant *C2,
2348 bool HasNUW, bool HasNSW) {
2349 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2350 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2351 return get(Instruction::Shl, C1, C2, Flags);
2354 Constant *ConstantExpr::getLShr(Constant *C1, Constant *C2, bool isExact) {
2355 return get(Instruction::LShr, C1, C2,
2356 isExact ? PossiblyExactOperator::IsExact : 0);
2359 Constant *ConstantExpr::getAShr(Constant *C1, Constant *C2, bool isExact) {
2360 return get(Instruction::AShr, C1, C2,
2361 isExact ? PossiblyExactOperator::IsExact : 0);
2364 /// getBinOpIdentity - Return the identity for the given binary operation,
2365 /// i.e. a constant C such that X op C = X and C op X = X for every X. It
2366 /// returns null if the operator doesn't have an identity.
2367 Constant *ConstantExpr::getBinOpIdentity(unsigned Opcode, Type *Ty) {
2370 // Doesn't have an identity.
2373 case Instruction::Add:
2374 case Instruction::Or:
2375 case Instruction::Xor:
2376 return Constant::getNullValue(Ty);
2378 case Instruction::Mul:
2379 return ConstantInt::get(Ty, 1);
2381 case Instruction::And:
2382 return Constant::getAllOnesValue(Ty);
2386 /// getBinOpAbsorber - Return the absorbing element for the given binary
2387 /// operation, i.e. a constant C such that X op C = C and C op X = C for
2388 /// every X. For example, this returns zero for integer multiplication.
2389 /// It returns null if the operator doesn't have an absorbing element.
2390 Constant *ConstantExpr::getBinOpAbsorber(unsigned Opcode, Type *Ty) {
2393 // Doesn't have an absorber.
2396 case Instruction::Or:
2397 return Constant::getAllOnesValue(Ty);
2399 case Instruction::And:
2400 case Instruction::Mul:
2401 return Constant::getNullValue(Ty);
2405 // destroyConstant - Remove the constant from the constant table...
2407 void ConstantExpr::destroyConstantImpl() {
2408 getType()->getContext().pImpl->ExprConstants.remove(this);
2411 const char *ConstantExpr::getOpcodeName() const {
2412 return Instruction::getOpcodeName(getOpcode());
2415 GetElementPtrConstantExpr::GetElementPtrConstantExpr(
2416 Type *SrcElementTy, Constant *C, ArrayRef<Constant *> IdxList, Type *DestTy)
2417 : ConstantExpr(DestTy, Instruction::GetElementPtr,
2418 OperandTraits<GetElementPtrConstantExpr>::op_end(this) -
2419 (IdxList.size() + 1),
2420 IdxList.size() + 1),
2421 SrcElementTy(SrcElementTy) {
2423 Use *OperandList = getOperandList();
2424 for (unsigned i = 0, E = IdxList.size(); i != E; ++i)
2425 OperandList[i+1] = IdxList[i];
2428 Type *GetElementPtrConstantExpr::getSourceElementType() const {
2429 return SrcElementTy;
2432 //===----------------------------------------------------------------------===//
2433 // ConstantData* implementations
2435 void ConstantDataArray::anchor() {}
2436 void ConstantDataVector::anchor() {}
2438 /// getElementType - Return the element type of the array/vector.
2439 Type *ConstantDataSequential::getElementType() const {
2440 return getType()->getElementType();
2443 StringRef ConstantDataSequential::getRawDataValues() const {
2444 return StringRef(DataElements, getNumElements()*getElementByteSize());
2447 /// isElementTypeCompatible - Return true if a ConstantDataSequential can be
2448 /// formed with a vector or array of the specified element type.
2449 /// ConstantDataArray only works with normal float and int types that are
2450 /// stored densely in memory, not with things like i42 or x86_f80.
2451 bool ConstantDataSequential::isElementTypeCompatible(Type *Ty) {
2452 if (Ty->isFloatTy() || Ty->isDoubleTy()) return true;
2453 if (auto *IT = dyn_cast<IntegerType>(Ty)) {
2454 switch (IT->getBitWidth()) {
2466 /// getNumElements - Return the number of elements in the array or vector.
2467 unsigned ConstantDataSequential::getNumElements() const {
2468 if (ArrayType *AT = dyn_cast<ArrayType>(getType()))
2469 return AT->getNumElements();
2470 return getType()->getVectorNumElements();
2474 /// getElementByteSize - Return the size in bytes of the elements in the data.
2475 uint64_t ConstantDataSequential::getElementByteSize() const {
2476 return getElementType()->getPrimitiveSizeInBits()/8;
2479 /// getElementPointer - Return the start of the specified element.
2480 const char *ConstantDataSequential::getElementPointer(unsigned Elt) const {
2481 assert(Elt < getNumElements() && "Invalid Elt");
2482 return DataElements+Elt*getElementByteSize();
2486 /// isAllZeros - return true if the array is empty or all zeros.
2487 static bool isAllZeros(StringRef Arr) {
2488 for (StringRef::iterator I = Arr.begin(), E = Arr.end(); I != E; ++I)
2494 /// getImpl - This is the underlying implementation of all of the
2495 /// ConstantDataSequential::get methods. They all thunk down to here, providing
2496 /// the correct element type. We take the bytes in as a StringRef because
2497 /// we *want* an underlying "char*" to avoid TBAA type punning violations.
2498 Constant *ConstantDataSequential::getImpl(StringRef Elements, Type *Ty) {
2499 assert(isElementTypeCompatible(Ty->getSequentialElementType()));
2500 // If the elements are all zero or there are no elements, return a CAZ, which
2501 // is more dense and canonical.
2502 if (isAllZeros(Elements))
2503 return ConstantAggregateZero::get(Ty);
2505 // Do a lookup to see if we have already formed one of these.
2508 .pImpl->CDSConstants.insert(std::make_pair(Elements, nullptr))
2511 // The bucket can point to a linked list of different CDS's that have the same
2512 // body but different types. For example, 0,0,0,1 could be a 4 element array
2513 // of i8, or a 1-element array of i32. They'll both end up in the same
2514 /// StringMap bucket, linked up by their Next pointers. Walk the list.
2515 ConstantDataSequential **Entry = &Slot.second;
2516 for (ConstantDataSequential *Node = *Entry; Node;
2517 Entry = &Node->Next, Node = *Entry)
2518 if (Node->getType() == Ty)
2521 // Okay, we didn't get a hit. Create a node of the right class, link it in,
2523 if (isa<ArrayType>(Ty))
2524 return *Entry = new ConstantDataArray(Ty, Slot.first().data());
2526 assert(isa<VectorType>(Ty));
2527 return *Entry = new ConstantDataVector(Ty, Slot.first().data());
2530 void ConstantDataSequential::destroyConstantImpl() {
2531 // Remove the constant from the StringMap.
2532 StringMap<ConstantDataSequential*> &CDSConstants =
2533 getType()->getContext().pImpl->CDSConstants;
2535 StringMap<ConstantDataSequential*>::iterator Slot =
2536 CDSConstants.find(getRawDataValues());
2538 assert(Slot != CDSConstants.end() && "CDS not found in uniquing table");
2540 ConstantDataSequential **Entry = &Slot->getValue();
2542 // Remove the entry from the hash table.
2543 if (!(*Entry)->Next) {
2544 // If there is only one value in the bucket (common case) it must be this
2545 // entry, and removing the entry should remove the bucket completely.
2546 assert((*Entry) == this && "Hash mismatch in ConstantDataSequential");
2547 getContext().pImpl->CDSConstants.erase(Slot);
2549 // Otherwise, there are multiple entries linked off the bucket, unlink the
2550 // node we care about but keep the bucket around.
2551 for (ConstantDataSequential *Node = *Entry; ;
2552 Entry = &Node->Next, Node = *Entry) {
2553 assert(Node && "Didn't find entry in its uniquing hash table!");
2554 // If we found our entry, unlink it from the list and we're done.
2556 *Entry = Node->Next;
2562 // If we were part of a list, make sure that we don't delete the list that is
2563 // still owned by the uniquing map.
2567 /// get() constructors - Return a constant with array type with an element
2568 /// count and element type matching the ArrayRef passed in. Note that this
2569 /// can return a ConstantAggregateZero object.
2570 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint8_t> Elts) {
2571 Type *Ty = ArrayType::get(Type::getInt8Ty(Context), Elts.size());
2572 const char *Data = reinterpret_cast<const char *>(Elts.data());
2573 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*1), Ty);
2575 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint16_t> Elts){
2576 Type *Ty = ArrayType::get(Type::getInt16Ty(Context), Elts.size());
2577 const char *Data = reinterpret_cast<const char *>(Elts.data());
2578 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*2), Ty);
2580 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint32_t> Elts){
2581 Type *Ty = ArrayType::get(Type::getInt32Ty(Context), Elts.size());
2582 const char *Data = reinterpret_cast<const char *>(Elts.data());
2583 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2585 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint64_t> Elts){
2586 Type *Ty = ArrayType::get(Type::getInt64Ty(Context), Elts.size());
2587 const char *Data = reinterpret_cast<const char *>(Elts.data());
2588 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*8), Ty);
2590 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<float> Elts) {
2591 Type *Ty = ArrayType::get(Type::getFloatTy(Context), Elts.size());
2592 const char *Data = reinterpret_cast<const char *>(Elts.data());
2593 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2595 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<double> Elts) {
2596 Type *Ty = ArrayType::get(Type::getDoubleTy(Context), Elts.size());
2597 const char *Data = reinterpret_cast<const char *>(Elts.data());
2598 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2601 /// getFP() constructors - Return a constant with array type with an element
2602 /// count and element type of float with precision matching the number of
2603 /// bits in the ArrayRef passed in. (i.e. half for 16bits, float for 32bits,
2604 /// double for 64bits) Note that this can return a ConstantAggregateZero
2606 Constant *ConstantDataArray::getFP(LLVMContext &Context,
2607 ArrayRef<uint16_t> Elts) {
2608 Type *Ty = VectorType::get(Type::getHalfTy(Context), Elts.size());
2609 const char *Data = reinterpret_cast<const char *>(Elts.data());
2610 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 2), Ty);
2612 Constant *ConstantDataArray::getFP(LLVMContext &Context,
2613 ArrayRef<uint32_t> Elts) {
2614 Type *Ty = ArrayType::get(Type::getFloatTy(Context), Elts.size());
2615 const char *Data = reinterpret_cast<const char *>(Elts.data());
2616 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 4), Ty);
2618 Constant *ConstantDataArray::getFP(LLVMContext &Context,
2619 ArrayRef<uint64_t> Elts) {
2620 Type *Ty = ArrayType::get(Type::getDoubleTy(Context), Elts.size());
2621 const char *Data = reinterpret_cast<const char *>(Elts.data());
2622 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2625 /// getString - This method constructs a CDS and initializes it with a text
2626 /// string. The default behavior (AddNull==true) causes a null terminator to
2627 /// be placed at the end of the array (increasing the length of the string by
2628 /// one more than the StringRef would normally indicate. Pass AddNull=false
2629 /// to disable this behavior.
2630 Constant *ConstantDataArray::getString(LLVMContext &Context,
2631 StringRef Str, bool AddNull) {
2633 const uint8_t *Data = reinterpret_cast<const uint8_t *>(Str.data());
2634 return get(Context, makeArrayRef(const_cast<uint8_t *>(Data),
2638 SmallVector<uint8_t, 64> ElementVals;
2639 ElementVals.append(Str.begin(), Str.end());
2640 ElementVals.push_back(0);
2641 return get(Context, ElementVals);
2644 /// get() constructors - Return a constant with vector type with an element
2645 /// count and element type matching the ArrayRef passed in. Note that this
2646 /// can return a ConstantAggregateZero object.
2647 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint8_t> Elts){
2648 Type *Ty = VectorType::get(Type::getInt8Ty(Context), Elts.size());
2649 const char *Data = reinterpret_cast<const char *>(Elts.data());
2650 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*1), Ty);
2652 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint16_t> Elts){
2653 Type *Ty = VectorType::get(Type::getInt16Ty(Context), Elts.size());
2654 const char *Data = reinterpret_cast<const char *>(Elts.data());
2655 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*2), Ty);
2657 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint32_t> Elts){
2658 Type *Ty = VectorType::get(Type::getInt32Ty(Context), Elts.size());
2659 const char *Data = reinterpret_cast<const char *>(Elts.data());
2660 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2662 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint64_t> Elts){
2663 Type *Ty = VectorType::get(Type::getInt64Ty(Context), Elts.size());
2664 const char *Data = reinterpret_cast<const char *>(Elts.data());
2665 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*8), Ty);
2667 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<float> Elts) {
2668 Type *Ty = VectorType::get(Type::getFloatTy(Context), Elts.size());
2669 const char *Data = reinterpret_cast<const char *>(Elts.data());
2670 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2672 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<double> Elts) {
2673 Type *Ty = VectorType::get(Type::getDoubleTy(Context), Elts.size());
2674 const char *Data = reinterpret_cast<const char *>(Elts.data());
2675 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2678 /// getFP() constructors - Return a constant with vector type with an element
2679 /// count and element type of float with the precision matching the number of
2680 /// bits in the ArrayRef passed in. (i.e. half for 16bits, float for 32bits,
2681 /// double for 64bits) Note that this can return a ConstantAggregateZero
2683 Constant *ConstantDataVector::getFP(LLVMContext &Context,
2684 ArrayRef<uint16_t> Elts) {
2685 Type *Ty = VectorType::get(Type::getHalfTy(Context), Elts.size());
2686 const char *Data = reinterpret_cast<const char *>(Elts.data());
2687 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 2), Ty);
2689 Constant *ConstantDataVector::getFP(LLVMContext &Context,
2690 ArrayRef<uint32_t> Elts) {
2691 Type *Ty = VectorType::get(Type::getFloatTy(Context), Elts.size());
2692 const char *Data = reinterpret_cast<const char *>(Elts.data());
2693 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 4), Ty);
2695 Constant *ConstantDataVector::getFP(LLVMContext &Context,
2696 ArrayRef<uint64_t> Elts) {
2697 Type *Ty = VectorType::get(Type::getDoubleTy(Context), Elts.size());
2698 const char *Data = reinterpret_cast<const char *>(Elts.data());
2699 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2702 Constant *ConstantDataVector::getSplat(unsigned NumElts, Constant *V) {
2703 assert(isElementTypeCompatible(V->getType()) &&
2704 "Element type not compatible with ConstantData");
2705 if (ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
2706 if (CI->getType()->isIntegerTy(8)) {
2707 SmallVector<uint8_t, 16> Elts(NumElts, CI->getZExtValue());
2708 return get(V->getContext(), Elts);
2710 if (CI->getType()->isIntegerTy(16)) {
2711 SmallVector<uint16_t, 16> Elts(NumElts, CI->getZExtValue());
2712 return get(V->getContext(), Elts);
2714 if (CI->getType()->isIntegerTy(32)) {
2715 SmallVector<uint32_t, 16> Elts(NumElts, CI->getZExtValue());
2716 return get(V->getContext(), Elts);
2718 assert(CI->getType()->isIntegerTy(64) && "Unsupported ConstantData type");
2719 SmallVector<uint64_t, 16> Elts(NumElts, CI->getZExtValue());
2720 return get(V->getContext(), Elts);
2723 if (ConstantFP *CFP = dyn_cast<ConstantFP>(V)) {
2724 if (CFP->getType()->isFloatTy()) {
2725 SmallVector<uint32_t, 16> Elts(
2726 NumElts, CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
2727 return getFP(V->getContext(), Elts);
2729 if (CFP->getType()->isDoubleTy()) {
2730 SmallVector<uint64_t, 16> Elts(
2731 NumElts, CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
2732 return getFP(V->getContext(), Elts);
2735 return ConstantVector::getSplat(NumElts, V);
2739 /// getElementAsInteger - If this is a sequential container of integers (of
2740 /// any size), return the specified element in the low bits of a uint64_t.
2741 uint64_t ConstantDataSequential::getElementAsInteger(unsigned Elt) const {
2742 assert(isa<IntegerType>(getElementType()) &&
2743 "Accessor can only be used when element is an integer");
2744 const char *EltPtr = getElementPointer(Elt);
2746 // The data is stored in host byte order, make sure to cast back to the right
2747 // type to load with the right endianness.
2748 switch (getElementType()->getIntegerBitWidth()) {
2749 default: llvm_unreachable("Invalid bitwidth for CDS");
2751 return *const_cast<uint8_t *>(reinterpret_cast<const uint8_t *>(EltPtr));
2753 return *const_cast<uint16_t *>(reinterpret_cast<const uint16_t *>(EltPtr));
2755 return *const_cast<uint32_t *>(reinterpret_cast<const uint32_t *>(EltPtr));
2757 return *const_cast<uint64_t *>(reinterpret_cast<const uint64_t *>(EltPtr));
2761 /// getElementAsAPFloat - If this is a sequential container of floating point
2762 /// type, return the specified element as an APFloat.
2763 APFloat ConstantDataSequential::getElementAsAPFloat(unsigned Elt) const {
2764 const char *EltPtr = getElementPointer(Elt);
2766 switch (getElementType()->getTypeID()) {
2768 llvm_unreachable("Accessor can only be used when element is float/double!");
2769 case Type::FloatTyID: {
2770 auto EltVal = *reinterpret_cast<const uint32_t *>(EltPtr);
2771 return APFloat(APFloat::IEEEsingle, APInt(32, EltVal));
2773 case Type::DoubleTyID: {
2774 auto EltVal = *reinterpret_cast<const uint64_t *>(EltPtr);
2775 return APFloat(APFloat::IEEEdouble, APInt(64, EltVal));
2780 /// getElementAsFloat - If this is an sequential container of floats, return
2781 /// the specified element as a float.
2782 float ConstantDataSequential::getElementAsFloat(unsigned Elt) const {
2783 assert(getElementType()->isFloatTy() &&
2784 "Accessor can only be used when element is a 'float'");
2785 const float *EltPtr = reinterpret_cast<const float *>(getElementPointer(Elt));
2786 return *const_cast<float *>(EltPtr);
2789 /// getElementAsDouble - If this is an sequential container of doubles, return
2790 /// the specified element as a float.
2791 double ConstantDataSequential::getElementAsDouble(unsigned Elt) const {
2792 assert(getElementType()->isDoubleTy() &&
2793 "Accessor can only be used when element is a 'float'");
2794 const double *EltPtr =
2795 reinterpret_cast<const double *>(getElementPointer(Elt));
2796 return *const_cast<double *>(EltPtr);
2799 /// getElementAsConstant - Return a Constant for a specified index's element.
2800 /// Note that this has to compute a new constant to return, so it isn't as
2801 /// efficient as getElementAsInteger/Float/Double.
2802 Constant *ConstantDataSequential::getElementAsConstant(unsigned Elt) const {
2803 if (getElementType()->isFloatTy() || getElementType()->isDoubleTy())
2804 return ConstantFP::get(getContext(), getElementAsAPFloat(Elt));
2806 return ConstantInt::get(getElementType(), getElementAsInteger(Elt));
2809 /// isString - This method returns true if this is an array of i8.
2810 bool ConstantDataSequential::isString() const {
2811 return isa<ArrayType>(getType()) && getElementType()->isIntegerTy(8);
2814 /// isCString - This method returns true if the array "isString", ends with a
2815 /// nul byte, and does not contains any other nul bytes.
2816 bool ConstantDataSequential::isCString() const {
2820 StringRef Str = getAsString();
2822 // The last value must be nul.
2823 if (Str.back() != 0) return false;
2825 // Other elements must be non-nul.
2826 return Str.drop_back().find(0) == StringRef::npos;
2829 /// getSplatValue - If this is a splat constant, meaning that all of the
2830 /// elements have the same value, return that value. Otherwise return nullptr.
2831 Constant *ConstantDataVector::getSplatValue() const {
2832 const char *Base = getRawDataValues().data();
2834 // Compare elements 1+ to the 0'th element.
2835 unsigned EltSize = getElementByteSize();
2836 for (unsigned i = 1, e = getNumElements(); i != e; ++i)
2837 if (memcmp(Base, Base+i*EltSize, EltSize))
2840 // If they're all the same, return the 0th one as a representative.
2841 return getElementAsConstant(0);
2844 //===----------------------------------------------------------------------===//
2845 // handleOperandChange implementations
2847 /// Update this constant array to change uses of
2848 /// 'From' to be uses of 'To'. This must update the uniquing data structures
2851 /// Note that we intentionally replace all uses of From with To here. Consider
2852 /// a large array that uses 'From' 1000 times. By handling this case all here,
2853 /// ConstantArray::handleOperandChange is only invoked once, and that
2854 /// single invocation handles all 1000 uses. Handling them one at a time would
2855 /// work, but would be really slow because it would have to unique each updated
2858 void Constant::handleOperandChange(Value *From, Value *To, Use *U) {
2859 Value *Replacement = nullptr;
2860 switch (getValueID()) {
2862 llvm_unreachable("Not a constant!");
2863 #define HANDLE_CONSTANT(Name) \
2864 case Value::Name##Val: \
2865 Replacement = cast<Name>(this)->handleOperandChangeImpl(From, To, U); \
2867 #include "llvm/IR/Value.def"
2870 // If handleOperandChangeImpl returned nullptr, then it handled
2871 // replacing itself and we don't want to delete or replace anything else here.
2875 // I do need to replace this with an existing value.
2876 assert(Replacement != this && "I didn't contain From!");
2878 // Everyone using this now uses the replacement.
2879 replaceAllUsesWith(Replacement);
2881 // Delete the old constant!
2885 Value *ConstantInt::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
2886 llvm_unreachable("Unsupported class for handleOperandChange()!");
2889 Value *ConstantFP::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
2890 llvm_unreachable("Unsupported class for handleOperandChange()!");
2893 Value *ConstantTokenNone::handleOperandChangeImpl(Value *From, Value *To,
2895 llvm_unreachable("Unsupported class for handleOperandChange()!");
2898 Value *UndefValue::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
2899 llvm_unreachable("Unsupported class for handleOperandChange()!");
2902 Value *ConstantPointerNull::handleOperandChangeImpl(Value *From, Value *To,
2904 llvm_unreachable("Unsupported class for handleOperandChange()!");
2907 Value *ConstantAggregateZero::handleOperandChangeImpl(Value *From, Value *To,
2909 llvm_unreachable("Unsupported class for handleOperandChange()!");
2912 Value *ConstantDataSequential::handleOperandChangeImpl(Value *From, Value *To,
2914 llvm_unreachable("Unsupported class for handleOperandChange()!");
2917 Value *ConstantArray::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
2918 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2919 Constant *ToC = cast<Constant>(To);
2921 SmallVector<Constant*, 8> Values;
2922 Values.reserve(getNumOperands()); // Build replacement array.
2924 // Fill values with the modified operands of the constant array. Also,
2925 // compute whether this turns into an all-zeros array.
2926 unsigned NumUpdated = 0;
2928 // Keep track of whether all the values in the array are "ToC".
2929 bool AllSame = true;
2930 Use *OperandList = getOperandList();
2931 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2932 Constant *Val = cast<Constant>(O->get());
2937 Values.push_back(Val);
2938 AllSame &= Val == ToC;
2941 if (AllSame && ToC->isNullValue())
2942 return ConstantAggregateZero::get(getType());
2944 if (AllSame && isa<UndefValue>(ToC))
2945 return UndefValue::get(getType());
2947 // Check for any other type of constant-folding.
2948 if (Constant *C = getImpl(getType(), Values))
2951 // Update to the new value.
2952 return getContext().pImpl->ArrayConstants.replaceOperandsInPlace(
2953 Values, this, From, ToC, NumUpdated, U - OperandList);
2956 Value *ConstantStruct::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
2957 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2958 Constant *ToC = cast<Constant>(To);
2960 Use *OperandList = getOperandList();
2961 unsigned OperandToUpdate = U-OperandList;
2962 assert(getOperand(OperandToUpdate) == From && "ReplaceAllUsesWith broken!");
2964 SmallVector<Constant*, 8> Values;
2965 Values.reserve(getNumOperands()); // Build replacement struct.
2967 // Fill values with the modified operands of the constant struct. Also,
2968 // compute whether this turns into an all-zeros struct.
2969 bool isAllZeros = false;
2970 bool isAllUndef = false;
2971 if (ToC->isNullValue()) {
2973 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2974 Constant *Val = cast<Constant>(O->get());
2975 Values.push_back(Val);
2976 if (isAllZeros) isAllZeros = Val->isNullValue();
2978 } else if (isa<UndefValue>(ToC)) {
2980 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2981 Constant *Val = cast<Constant>(O->get());
2982 Values.push_back(Val);
2983 if (isAllUndef) isAllUndef = isa<UndefValue>(Val);
2986 for (Use *O = OperandList, *E = OperandList + getNumOperands(); O != E; ++O)
2987 Values.push_back(cast<Constant>(O->get()));
2989 Values[OperandToUpdate] = ToC;
2992 return ConstantAggregateZero::get(getType());
2995 return UndefValue::get(getType());
2997 // Update to the new value.
2998 return getContext().pImpl->StructConstants.replaceOperandsInPlace(
2999 Values, this, From, ToC);
3002 Value *ConstantVector::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
3003 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
3004 Constant *ToC = cast<Constant>(To);
3006 SmallVector<Constant*, 8> Values;
3007 Values.reserve(getNumOperands()); // Build replacement array...
3008 unsigned NumUpdated = 0;
3009 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
3010 Constant *Val = getOperand(i);
3015 Values.push_back(Val);
3018 if (Constant *C = getImpl(Values))
3021 // Update to the new value.
3022 Use *OperandList = getOperandList();
3023 return getContext().pImpl->VectorConstants.replaceOperandsInPlace(
3024 Values, this, From, ToC, NumUpdated, U - OperandList);
3027 Value *ConstantExpr::handleOperandChangeImpl(Value *From, Value *ToV, Use *U) {
3028 assert(isa<Constant>(ToV) && "Cannot make Constant refer to non-constant!");
3029 Constant *To = cast<Constant>(ToV);
3031 SmallVector<Constant*, 8> NewOps;
3032 unsigned NumUpdated = 0;
3033 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
3034 Constant *Op = getOperand(i);
3039 NewOps.push_back(Op);
3041 assert(NumUpdated && "I didn't contain From!");
3043 if (Constant *C = getWithOperands(NewOps, getType(), true))
3046 // Update to the new value.
3047 Use *OperandList = getOperandList();
3048 return getContext().pImpl->ExprConstants.replaceOperandsInPlace(
3049 NewOps, this, From, To, NumUpdated, U - OperandList);
3052 Instruction *ConstantExpr::getAsInstruction() {
3053 SmallVector<Value *, 4> ValueOperands(op_begin(), op_end());
3054 ArrayRef<Value*> Ops(ValueOperands);
3056 switch (getOpcode()) {
3057 case Instruction::Trunc:
3058 case Instruction::ZExt:
3059 case Instruction::SExt:
3060 case Instruction::FPTrunc:
3061 case Instruction::FPExt:
3062 case Instruction::UIToFP:
3063 case Instruction::SIToFP:
3064 case Instruction::FPToUI:
3065 case Instruction::FPToSI:
3066 case Instruction::PtrToInt:
3067 case Instruction::IntToPtr:
3068 case Instruction::BitCast:
3069 case Instruction::AddrSpaceCast:
3070 return CastInst::Create((Instruction::CastOps)getOpcode(),
3072 case Instruction::Select:
3073 return SelectInst::Create(Ops[0], Ops[1], Ops[2]);
3074 case Instruction::InsertElement:
3075 return InsertElementInst::Create(Ops[0], Ops[1], Ops[2]);
3076 case Instruction::ExtractElement:
3077 return ExtractElementInst::Create(Ops[0], Ops[1]);
3078 case Instruction::InsertValue:
3079 return InsertValueInst::Create(Ops[0], Ops[1], getIndices());
3080 case Instruction::ExtractValue:
3081 return ExtractValueInst::Create(Ops[0], getIndices());
3082 case Instruction::ShuffleVector:
3083 return new ShuffleVectorInst(Ops[0], Ops[1], Ops[2]);
3085 case Instruction::GetElementPtr: {
3086 const auto *GO = cast<GEPOperator>(this);
3087 if (GO->isInBounds())
3088 return GetElementPtrInst::CreateInBounds(GO->getSourceElementType(),
3089 Ops[0], Ops.slice(1));
3090 return GetElementPtrInst::Create(GO->getSourceElementType(), Ops[0],
3093 case Instruction::ICmp:
3094 case Instruction::FCmp:
3095 return CmpInst::Create((Instruction::OtherOps)getOpcode(),
3096 getPredicate(), Ops[0], Ops[1]);
3099 assert(getNumOperands() == 2 && "Must be binary operator?");
3100 BinaryOperator *BO =
3101 BinaryOperator::Create((Instruction::BinaryOps)getOpcode(),
3103 if (isa<OverflowingBinaryOperator>(BO)) {
3104 BO->setHasNoUnsignedWrap(SubclassOptionalData &
3105 OverflowingBinaryOperator::NoUnsignedWrap);
3106 BO->setHasNoSignedWrap(SubclassOptionalData &
3107 OverflowingBinaryOperator::NoSignedWrap);
3109 if (isa<PossiblyExactOperator>(BO))
3110 BO->setIsExact(SubclassOptionalData & PossiblyExactOperator::IsExact);