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/STLExtras.h"
18 #include "llvm/ADT/SmallVector.h"
19 #include "llvm/ADT/StringExtras.h"
20 #include "llvm/ADT/StringMap.h"
21 #include "llvm/IR/DerivedTypes.h"
22 #include "llvm/IR/GetElementPtrTypeIterator.h"
23 #include "llvm/IR/GlobalValue.h"
24 #include "llvm/IR/Instructions.h"
25 #include "llvm/IR/Module.h"
26 #include "llvm/IR/Operator.h"
27 #include "llvm/Support/Debug.h"
28 #include "llvm/Support/ErrorHandling.h"
29 #include "llvm/Support/ManagedStatic.h"
30 #include "llvm/Support/MathExtras.h"
31 #include "llvm/Support/raw_ostream.h"
36 //===----------------------------------------------------------------------===//
38 //===----------------------------------------------------------------------===//
40 void Constant::anchor() { }
42 void ConstantData::anchor() {}
44 bool Constant::isNegativeZeroValue() const {
45 // Floating point values have an explicit -0.0 value.
46 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
47 return CFP->isZero() && CFP->isNegative();
49 // Equivalent for a vector of -0.0's.
50 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
51 if (ConstantFP *SplatCFP = dyn_cast_or_null<ConstantFP>(CV->getSplatValue()))
52 if (SplatCFP && SplatCFP->isZero() && SplatCFP->isNegative())
55 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
56 if (ConstantFP *SplatCFP = dyn_cast_or_null<ConstantFP>(CV->getSplatValue()))
57 if (SplatCFP && SplatCFP->isZero() && SplatCFP->isNegative())
60 // We've already handled true FP case; any other FP vectors can't represent -0.0.
61 if (getType()->isFPOrFPVectorTy())
64 // Otherwise, just use +0.0.
68 // Return true iff this constant is positive zero (floating point), negative
69 // zero (floating point), or a null value.
70 bool Constant::isZeroValue() const {
71 // Floating point values have an explicit -0.0 value.
72 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
75 // Equivalent for a vector of -0.0's.
76 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
77 if (ConstantFP *SplatCFP = dyn_cast_or_null<ConstantFP>(CV->getSplatValue()))
78 if (SplatCFP && SplatCFP->isZero())
81 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
82 if (ConstantFP *SplatCFP = dyn_cast_or_null<ConstantFP>(CV->getSplatValue()))
83 if (SplatCFP && SplatCFP->isZero())
86 // Otherwise, just use +0.0.
90 bool Constant::isNullValue() const {
92 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
96 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
97 return CFP->isZero() && !CFP->isNegative();
99 // constant zero is zero for aggregates, cpnull is null for pointers, none for
101 return isa<ConstantAggregateZero>(this) || isa<ConstantPointerNull>(this) ||
102 isa<ConstantTokenNone>(this);
105 bool Constant::isAllOnesValue() const {
106 // Check for -1 integers
107 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
108 return CI->isMinusOne();
110 // Check for FP which are bitcasted from -1 integers
111 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
112 return CFP->getValueAPF().bitcastToAPInt().isAllOnesValue();
114 // Check for constant vectors which are splats of -1 values.
115 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
116 if (Constant *Splat = CV->getSplatValue())
117 return Splat->isAllOnesValue();
119 // Check for constant vectors which are splats of -1 values.
120 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
121 if (Constant *Splat = CV->getSplatValue())
122 return Splat->isAllOnesValue();
127 bool Constant::isOneValue() const {
128 // Check for 1 integers
129 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
132 // Check for FP which are bitcasted from 1 integers
133 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
134 return CFP->getValueAPF().bitcastToAPInt() == 1;
136 // Check for constant vectors which are splats of 1 values.
137 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
138 if (Constant *Splat = CV->getSplatValue())
139 return Splat->isOneValue();
141 // Check for constant vectors which are splats of 1 values.
142 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
143 if (Constant *Splat = CV->getSplatValue())
144 return Splat->isOneValue();
149 bool Constant::isMinSignedValue() const {
150 // Check for INT_MIN integers
151 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
152 return CI->isMinValue(/*isSigned=*/true);
154 // Check for FP which are bitcasted from INT_MIN integers
155 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
156 return CFP->getValueAPF().bitcastToAPInt().isMinSignedValue();
158 // Check for constant vectors which are splats of INT_MIN values.
159 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
160 if (Constant *Splat = CV->getSplatValue())
161 return Splat->isMinSignedValue();
163 // Check for constant vectors which are splats of INT_MIN values.
164 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
165 if (Constant *Splat = CV->getSplatValue())
166 return Splat->isMinSignedValue();
171 bool Constant::isNotMinSignedValue() const {
172 // Check for INT_MIN integers
173 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
174 return !CI->isMinValue(/*isSigned=*/true);
176 // Check for FP which are bitcasted from INT_MIN integers
177 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
178 return !CFP->getValueAPF().bitcastToAPInt().isMinSignedValue();
180 // Check for constant vectors which are splats of INT_MIN values.
181 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
182 if (Constant *Splat = CV->getSplatValue())
183 return Splat->isNotMinSignedValue();
185 // Check for constant vectors which are splats of INT_MIN values.
186 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
187 if (Constant *Splat = CV->getSplatValue())
188 return Splat->isNotMinSignedValue();
190 // It *may* contain INT_MIN, we can't tell.
194 /// Constructor to create a '0' constant of arbitrary type.
195 Constant *Constant::getNullValue(Type *Ty) {
196 switch (Ty->getTypeID()) {
197 case Type::IntegerTyID:
198 return ConstantInt::get(Ty, 0);
200 return ConstantFP::get(Ty->getContext(),
201 APFloat::getZero(APFloat::IEEEhalf()));
202 case Type::FloatTyID:
203 return ConstantFP::get(Ty->getContext(),
204 APFloat::getZero(APFloat::IEEEsingle()));
205 case Type::DoubleTyID:
206 return ConstantFP::get(Ty->getContext(),
207 APFloat::getZero(APFloat::IEEEdouble()));
208 case Type::X86_FP80TyID:
209 return ConstantFP::get(Ty->getContext(),
210 APFloat::getZero(APFloat::x87DoubleExtended()));
211 case Type::FP128TyID:
212 return ConstantFP::get(Ty->getContext(),
213 APFloat::getZero(APFloat::IEEEquad()));
214 case Type::PPC_FP128TyID:
215 return ConstantFP::get(Ty->getContext(),
216 APFloat(APFloat::PPCDoubleDouble(),
217 APInt::getNullValue(128)));
218 case Type::PointerTyID:
219 return ConstantPointerNull::get(cast<PointerType>(Ty));
220 case Type::StructTyID:
221 case Type::ArrayTyID:
222 case Type::VectorTyID:
223 return ConstantAggregateZero::get(Ty);
224 case Type::TokenTyID:
225 return ConstantTokenNone::get(Ty->getContext());
227 // Function, Label, or Opaque type?
228 llvm_unreachable("Cannot create a null constant of that type!");
232 Constant *Constant::getIntegerValue(Type *Ty, const APInt &V) {
233 Type *ScalarTy = Ty->getScalarType();
235 // Create the base integer constant.
236 Constant *C = ConstantInt::get(Ty->getContext(), V);
238 // Convert an integer to a pointer, if necessary.
239 if (PointerType *PTy = dyn_cast<PointerType>(ScalarTy))
240 C = ConstantExpr::getIntToPtr(C, PTy);
242 // Broadcast a scalar to a vector, if necessary.
243 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
244 C = ConstantVector::getSplat(VTy->getNumElements(), C);
249 Constant *Constant::getAllOnesValue(Type *Ty) {
250 if (IntegerType *ITy = dyn_cast<IntegerType>(Ty))
251 return ConstantInt::get(Ty->getContext(),
252 APInt::getAllOnesValue(ITy->getBitWidth()));
254 if (Ty->isFloatingPointTy()) {
255 APFloat FL = APFloat::getAllOnesValue(Ty->getPrimitiveSizeInBits(),
256 !Ty->isPPC_FP128Ty());
257 return ConstantFP::get(Ty->getContext(), FL);
260 VectorType *VTy = cast<VectorType>(Ty);
261 return ConstantVector::getSplat(VTy->getNumElements(),
262 getAllOnesValue(VTy->getElementType()));
265 Constant *Constant::getAggregateElement(unsigned Elt) const {
266 if (const ConstantAggregate *CC = dyn_cast<ConstantAggregate>(this))
267 return Elt < CC->getNumOperands() ? CC->getOperand(Elt) : nullptr;
269 if (const ConstantAggregateZero *CAZ = dyn_cast<ConstantAggregateZero>(this))
270 return Elt < CAZ->getNumElements() ? CAZ->getElementValue(Elt) : nullptr;
272 if (const UndefValue *UV = dyn_cast<UndefValue>(this))
273 return Elt < UV->getNumElements() ? UV->getElementValue(Elt) : nullptr;
275 if (const ConstantDataSequential *CDS =dyn_cast<ConstantDataSequential>(this))
276 return Elt < CDS->getNumElements() ? CDS->getElementAsConstant(Elt)
281 Constant *Constant::getAggregateElement(Constant *Elt) const {
282 assert(isa<IntegerType>(Elt->getType()) && "Index must be an integer");
283 if (ConstantInt *CI = dyn_cast<ConstantInt>(Elt))
284 return getAggregateElement(CI->getZExtValue());
288 void Constant::destroyConstant() {
289 /// First call destroyConstantImpl on the subclass. This gives the subclass
290 /// a chance to remove the constant from any maps/pools it's contained in.
291 switch (getValueID()) {
293 llvm_unreachable("Not a constant!");
294 #define HANDLE_CONSTANT(Name) \
295 case Value::Name##Val: \
296 cast<Name>(this)->destroyConstantImpl(); \
298 #include "llvm/IR/Value.def"
301 // When a Constant is destroyed, there may be lingering
302 // references to the constant by other constants in the constant pool. These
303 // constants are implicitly dependent on the module that is being deleted,
304 // but they don't know that. Because we only find out when the CPV is
305 // deleted, we must now notify all of our users (that should only be
306 // Constants) that they are, in fact, invalid now and should be deleted.
308 while (!use_empty()) {
309 Value *V = user_back();
310 #ifndef NDEBUG // Only in -g mode...
311 if (!isa<Constant>(V)) {
312 dbgs() << "While deleting: " << *this
313 << "\n\nUse still stuck around after Def is destroyed: " << *V
317 assert(isa<Constant>(V) && "References remain to Constant being destroyed");
318 cast<Constant>(V)->destroyConstant();
320 // The constant should remove itself from our use list...
321 assert((use_empty() || user_back() != V) && "Constant not removed!");
324 // Value has no outstanding references it is safe to delete it now...
328 static bool canTrapImpl(const Constant *C,
329 SmallPtrSetImpl<const ConstantExpr *> &NonTrappingOps) {
330 assert(C->getType()->isFirstClassType() && "Cannot evaluate aggregate vals!");
331 // The only thing that could possibly trap are constant exprs.
332 const ConstantExpr *CE = dyn_cast<ConstantExpr>(C);
336 // ConstantExpr traps if any operands can trap.
337 for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i) {
338 if (ConstantExpr *Op = dyn_cast<ConstantExpr>(CE->getOperand(i))) {
339 if (NonTrappingOps.insert(Op).second && canTrapImpl(Op, NonTrappingOps))
344 // Otherwise, only specific operations can trap.
345 switch (CE->getOpcode()) {
348 case Instruction::UDiv:
349 case Instruction::SDiv:
350 case Instruction::URem:
351 case Instruction::SRem:
352 // Div and rem can trap if the RHS is not known to be non-zero.
353 if (!isa<ConstantInt>(CE->getOperand(1)) ||CE->getOperand(1)->isNullValue())
359 bool Constant::canTrap() const {
360 SmallPtrSet<const ConstantExpr *, 4> NonTrappingOps;
361 return canTrapImpl(this, NonTrappingOps);
364 /// Check if C contains a GlobalValue for which Predicate is true.
366 ConstHasGlobalValuePredicate(const Constant *C,
367 bool (*Predicate)(const GlobalValue *)) {
368 SmallPtrSet<const Constant *, 8> Visited;
369 SmallVector<const Constant *, 8> WorkList;
370 WorkList.push_back(C);
373 while (!WorkList.empty()) {
374 const Constant *WorkItem = WorkList.pop_back_val();
375 if (const auto *GV = dyn_cast<GlobalValue>(WorkItem))
378 for (const Value *Op : WorkItem->operands()) {
379 const Constant *ConstOp = dyn_cast<Constant>(Op);
382 if (Visited.insert(ConstOp).second)
383 WorkList.push_back(ConstOp);
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 bool Constant::isConstantUsed() const {
404 for (const User *U : users()) {
405 const Constant *UC = dyn_cast<Constant>(U);
406 if (!UC || isa<GlobalValue>(UC))
409 if (UC->isConstantUsed())
415 bool Constant::needsRelocation() const {
416 if (isa<GlobalValue>(this))
417 return true; // Global reference.
419 if (const BlockAddress *BA = dyn_cast<BlockAddress>(this))
420 return BA->getFunction()->needsRelocation();
422 // While raw uses of blockaddress need to be relocated, differences between
423 // two of them don't when they are for labels in the same function. This is a
424 // common idiom when creating a table for the indirect goto extension, so we
425 // handle it efficiently here.
426 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(this))
427 if (CE->getOpcode() == Instruction::Sub) {
428 ConstantExpr *LHS = dyn_cast<ConstantExpr>(CE->getOperand(0));
429 ConstantExpr *RHS = dyn_cast<ConstantExpr>(CE->getOperand(1));
430 if (LHS && RHS && LHS->getOpcode() == Instruction::PtrToInt &&
431 RHS->getOpcode() == Instruction::PtrToInt &&
432 isa<BlockAddress>(LHS->getOperand(0)) &&
433 isa<BlockAddress>(RHS->getOperand(0)) &&
434 cast<BlockAddress>(LHS->getOperand(0))->getFunction() ==
435 cast<BlockAddress>(RHS->getOperand(0))->getFunction())
440 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
441 Result |= cast<Constant>(getOperand(i))->needsRelocation();
446 /// If the specified constantexpr is dead, remove it. This involves recursively
447 /// eliminating any dead users of the constantexpr.
448 static bool removeDeadUsersOfConstant(const Constant *C) {
449 if (isa<GlobalValue>(C)) return false; // Cannot remove this
451 while (!C->use_empty()) {
452 const Constant *User = dyn_cast<Constant>(C->user_back());
453 if (!User) return false; // Non-constant usage;
454 if (!removeDeadUsersOfConstant(User))
455 return false; // Constant wasn't dead
458 const_cast<Constant*>(C)->destroyConstant();
463 void Constant::removeDeadConstantUsers() const {
464 Value::const_user_iterator I = user_begin(), E = user_end();
465 Value::const_user_iterator LastNonDeadUser = E;
467 const Constant *User = dyn_cast<Constant>(*I);
474 if (!removeDeadUsersOfConstant(User)) {
475 // If the constant wasn't dead, remember that this was the last live use
476 // and move on to the next constant.
482 // If the constant was dead, then the iterator is invalidated.
483 if (LastNonDeadUser == E) {
495 //===----------------------------------------------------------------------===//
497 //===----------------------------------------------------------------------===//
499 void ConstantInt::anchor() { }
501 ConstantInt::ConstantInt(IntegerType *Ty, const APInt &V)
502 : ConstantData(Ty, ConstantIntVal), Val(V) {
503 assert(V.getBitWidth() == Ty->getBitWidth() && "Invalid constant for type");
506 ConstantInt *ConstantInt::getTrue(LLVMContext &Context) {
507 LLVMContextImpl *pImpl = Context.pImpl;
508 if (!pImpl->TheTrueVal)
509 pImpl->TheTrueVal = ConstantInt::get(Type::getInt1Ty(Context), 1);
510 return pImpl->TheTrueVal;
513 ConstantInt *ConstantInt::getFalse(LLVMContext &Context) {
514 LLVMContextImpl *pImpl = Context.pImpl;
515 if (!pImpl->TheFalseVal)
516 pImpl->TheFalseVal = ConstantInt::get(Type::getInt1Ty(Context), 0);
517 return pImpl->TheFalseVal;
520 Constant *ConstantInt::getTrue(Type *Ty) {
521 VectorType *VTy = dyn_cast<VectorType>(Ty);
523 assert(Ty->isIntegerTy(1) && "True must be i1 or vector of i1.");
524 return ConstantInt::getTrue(Ty->getContext());
526 assert(VTy->getElementType()->isIntegerTy(1) &&
527 "True must be vector of i1 or i1.");
528 return ConstantVector::getSplat(VTy->getNumElements(),
529 ConstantInt::getTrue(Ty->getContext()));
532 Constant *ConstantInt::getFalse(Type *Ty) {
533 VectorType *VTy = dyn_cast<VectorType>(Ty);
535 assert(Ty->isIntegerTy(1) && "False must be i1 or vector of i1.");
536 return ConstantInt::getFalse(Ty->getContext());
538 assert(VTy->getElementType()->isIntegerTy(1) &&
539 "False must be vector of i1 or i1.");
540 return ConstantVector::getSplat(VTy->getNumElements(),
541 ConstantInt::getFalse(Ty->getContext()));
544 // Get a ConstantInt from an APInt.
545 ConstantInt *ConstantInt::get(LLVMContext &Context, const APInt &V) {
546 // get an existing value or the insertion position
547 LLVMContextImpl *pImpl = Context.pImpl;
548 std::unique_ptr<ConstantInt> &Slot = pImpl->IntConstants[V];
550 // Get the corresponding integer type for the bit width of the value.
551 IntegerType *ITy = IntegerType::get(Context, V.getBitWidth());
552 Slot.reset(new ConstantInt(ITy, V));
554 assert(Slot->getType() == IntegerType::get(Context, V.getBitWidth()));
558 Constant *ConstantInt::get(Type *Ty, uint64_t V, bool isSigned) {
559 Constant *C = get(cast<IntegerType>(Ty->getScalarType()), V, isSigned);
561 // For vectors, broadcast the value.
562 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
563 return ConstantVector::getSplat(VTy->getNumElements(), C);
568 ConstantInt *ConstantInt::get(IntegerType *Ty, uint64_t V, bool isSigned) {
569 return get(Ty->getContext(), APInt(Ty->getBitWidth(), V, isSigned));
572 ConstantInt *ConstantInt::getSigned(IntegerType *Ty, int64_t V) {
573 return get(Ty, V, true);
576 Constant *ConstantInt::getSigned(Type *Ty, int64_t V) {
577 return get(Ty, V, true);
580 Constant *ConstantInt::get(Type *Ty, const APInt& V) {
581 ConstantInt *C = get(Ty->getContext(), V);
582 assert(C->getType() == Ty->getScalarType() &&
583 "ConstantInt type doesn't match the type implied by its value!");
585 // For vectors, broadcast the value.
586 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
587 return ConstantVector::getSplat(VTy->getNumElements(), C);
592 ConstantInt *ConstantInt::get(IntegerType* Ty, StringRef Str, uint8_t radix) {
593 return get(Ty->getContext(), APInt(Ty->getBitWidth(), Str, radix));
596 /// Remove the constant from the constant table.
597 void ConstantInt::destroyConstantImpl() {
598 llvm_unreachable("You can't ConstantInt->destroyConstantImpl()!");
601 //===----------------------------------------------------------------------===//
603 //===----------------------------------------------------------------------===//
605 static const fltSemantics *TypeToFloatSemantics(Type *Ty) {
607 return &APFloat::IEEEhalf();
609 return &APFloat::IEEEsingle();
610 if (Ty->isDoubleTy())
611 return &APFloat::IEEEdouble();
612 if (Ty->isX86_FP80Ty())
613 return &APFloat::x87DoubleExtended();
614 else if (Ty->isFP128Ty())
615 return &APFloat::IEEEquad();
617 assert(Ty->isPPC_FP128Ty() && "Unknown FP format");
618 return &APFloat::PPCDoubleDouble();
621 void ConstantFP::anchor() { }
623 Constant *ConstantFP::get(Type *Ty, double V) {
624 LLVMContext &Context = Ty->getContext();
628 FV.convert(*TypeToFloatSemantics(Ty->getScalarType()),
629 APFloat::rmNearestTiesToEven, &ignored);
630 Constant *C = get(Context, FV);
632 // For vectors, broadcast the value.
633 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
634 return ConstantVector::getSplat(VTy->getNumElements(), C);
640 Constant *ConstantFP::get(Type *Ty, StringRef Str) {
641 LLVMContext &Context = Ty->getContext();
643 APFloat FV(*TypeToFloatSemantics(Ty->getScalarType()), Str);
644 Constant *C = get(Context, FV);
646 // For vectors, broadcast the value.
647 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
648 return ConstantVector::getSplat(VTy->getNumElements(), C);
653 Constant *ConstantFP::getNaN(Type *Ty, bool Negative, unsigned Type) {
654 const fltSemantics &Semantics = *TypeToFloatSemantics(Ty->getScalarType());
655 APFloat NaN = APFloat::getNaN(Semantics, Negative, Type);
656 Constant *C = get(Ty->getContext(), NaN);
658 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
659 return ConstantVector::getSplat(VTy->getNumElements(), C);
664 Constant *ConstantFP::getNegativeZero(Type *Ty) {
665 const fltSemantics &Semantics = *TypeToFloatSemantics(Ty->getScalarType());
666 APFloat NegZero = APFloat::getZero(Semantics, /*Negative=*/true);
667 Constant *C = get(Ty->getContext(), NegZero);
669 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
670 return ConstantVector::getSplat(VTy->getNumElements(), C);
676 Constant *ConstantFP::getZeroValueForNegation(Type *Ty) {
677 if (Ty->isFPOrFPVectorTy())
678 return getNegativeZero(Ty);
680 return Constant::getNullValue(Ty);
684 // ConstantFP accessors.
685 ConstantFP* ConstantFP::get(LLVMContext &Context, const APFloat& V) {
686 LLVMContextImpl* pImpl = Context.pImpl;
688 std::unique_ptr<ConstantFP> &Slot = pImpl->FPConstants[V];
692 if (&V.getSemantics() == &APFloat::IEEEhalf())
693 Ty = Type::getHalfTy(Context);
694 else if (&V.getSemantics() == &APFloat::IEEEsingle())
695 Ty = Type::getFloatTy(Context);
696 else if (&V.getSemantics() == &APFloat::IEEEdouble())
697 Ty = Type::getDoubleTy(Context);
698 else if (&V.getSemantics() == &APFloat::x87DoubleExtended())
699 Ty = Type::getX86_FP80Ty(Context);
700 else if (&V.getSemantics() == &APFloat::IEEEquad())
701 Ty = Type::getFP128Ty(Context);
703 assert(&V.getSemantics() == &APFloat::PPCDoubleDouble() &&
704 "Unknown FP format");
705 Ty = Type::getPPC_FP128Ty(Context);
707 Slot.reset(new ConstantFP(Ty, V));
713 Constant *ConstantFP::getInfinity(Type *Ty, bool Negative) {
714 const fltSemantics &Semantics = *TypeToFloatSemantics(Ty->getScalarType());
715 Constant *C = get(Ty->getContext(), APFloat::getInf(Semantics, Negative));
717 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
718 return ConstantVector::getSplat(VTy->getNumElements(), C);
723 ConstantFP::ConstantFP(Type *Ty, const APFloat &V)
724 : ConstantData(Ty, ConstantFPVal), Val(V) {
725 assert(&V.getSemantics() == TypeToFloatSemantics(Ty) &&
729 bool ConstantFP::isExactlyValue(const APFloat &V) const {
730 return Val.bitwiseIsEqual(V);
733 /// Remove the constant from the constant table.
734 void ConstantFP::destroyConstantImpl() {
735 llvm_unreachable("You can't ConstantInt->destroyConstantImpl()!");
738 //===----------------------------------------------------------------------===//
739 // ConstantAggregateZero Implementation
740 //===----------------------------------------------------------------------===//
742 Constant *ConstantAggregateZero::getSequentialElement() const {
743 return Constant::getNullValue(getType()->getSequentialElementType());
746 Constant *ConstantAggregateZero::getStructElement(unsigned Elt) const {
747 return Constant::getNullValue(getType()->getStructElementType(Elt));
750 Constant *ConstantAggregateZero::getElementValue(Constant *C) const {
751 if (isa<SequentialType>(getType()))
752 return getSequentialElement();
753 return getStructElement(cast<ConstantInt>(C)->getZExtValue());
756 Constant *ConstantAggregateZero::getElementValue(unsigned Idx) const {
757 if (isa<SequentialType>(getType()))
758 return getSequentialElement();
759 return getStructElement(Idx);
762 unsigned ConstantAggregateZero::getNumElements() const {
763 Type *Ty = getType();
764 if (auto *AT = dyn_cast<ArrayType>(Ty))
765 return AT->getNumElements();
766 if (auto *VT = dyn_cast<VectorType>(Ty))
767 return VT->getNumElements();
768 return Ty->getStructNumElements();
771 //===----------------------------------------------------------------------===//
772 // UndefValue Implementation
773 //===----------------------------------------------------------------------===//
775 UndefValue *UndefValue::getSequentialElement() const {
776 return UndefValue::get(getType()->getSequentialElementType());
779 UndefValue *UndefValue::getStructElement(unsigned Elt) const {
780 return UndefValue::get(getType()->getStructElementType(Elt));
783 UndefValue *UndefValue::getElementValue(Constant *C) const {
784 if (isa<SequentialType>(getType()))
785 return getSequentialElement();
786 return getStructElement(cast<ConstantInt>(C)->getZExtValue());
789 UndefValue *UndefValue::getElementValue(unsigned Idx) const {
790 if (isa<SequentialType>(getType()))
791 return getSequentialElement();
792 return getStructElement(Idx);
795 unsigned UndefValue::getNumElements() const {
796 Type *Ty = getType();
797 if (auto *ST = dyn_cast<SequentialType>(Ty))
798 return ST->getNumElements();
799 return Ty->getStructNumElements();
802 //===----------------------------------------------------------------------===//
803 // ConstantXXX Classes
804 //===----------------------------------------------------------------------===//
806 template <typename ItTy, typename EltTy>
807 static bool rangeOnlyContains(ItTy Start, ItTy End, EltTy Elt) {
808 for (; Start != End; ++Start)
814 template <typename SequentialTy, typename ElementTy>
815 static Constant *getIntSequenceIfElementsMatch(ArrayRef<Constant *> V) {
816 assert(!V.empty() && "Cannot get empty int sequence.");
818 SmallVector<ElementTy, 16> Elts;
819 for (Constant *C : V)
820 if (auto *CI = dyn_cast<ConstantInt>(C))
821 Elts.push_back(CI->getZExtValue());
824 return SequentialTy::get(V[0]->getContext(), Elts);
827 template <typename SequentialTy, typename ElementTy>
828 static Constant *getFPSequenceIfElementsMatch(ArrayRef<Constant *> V) {
829 assert(!V.empty() && "Cannot get empty FP sequence.");
831 SmallVector<ElementTy, 16> Elts;
832 for (Constant *C : V)
833 if (auto *CFP = dyn_cast<ConstantFP>(C))
834 Elts.push_back(CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
837 return SequentialTy::getFP(V[0]->getContext(), Elts);
840 template <typename SequenceTy>
841 static Constant *getSequenceIfElementsMatch(Constant *C,
842 ArrayRef<Constant *> V) {
843 // We speculatively build the elements here even if it turns out that there is
844 // a constantexpr or something else weird, since it is so uncommon for that to
846 if (ConstantInt *CI = dyn_cast<ConstantInt>(C)) {
847 if (CI->getType()->isIntegerTy(8))
848 return getIntSequenceIfElementsMatch<SequenceTy, uint8_t>(V);
849 else if (CI->getType()->isIntegerTy(16))
850 return getIntSequenceIfElementsMatch<SequenceTy, uint16_t>(V);
851 else if (CI->getType()->isIntegerTy(32))
852 return getIntSequenceIfElementsMatch<SequenceTy, uint32_t>(V);
853 else if (CI->getType()->isIntegerTy(64))
854 return getIntSequenceIfElementsMatch<SequenceTy, uint64_t>(V);
855 } else if (ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
856 if (CFP->getType()->isHalfTy())
857 return getFPSequenceIfElementsMatch<SequenceTy, uint16_t>(V);
858 else if (CFP->getType()->isFloatTy())
859 return getFPSequenceIfElementsMatch<SequenceTy, uint32_t>(V);
860 else if (CFP->getType()->isDoubleTy())
861 return getFPSequenceIfElementsMatch<SequenceTy, uint64_t>(V);
867 ConstantAggregate::ConstantAggregate(CompositeType *T, ValueTy VT,
868 ArrayRef<Constant *> V)
869 : Constant(T, VT, OperandTraits<ConstantAggregate>::op_end(this) - V.size(),
871 std::copy(V.begin(), V.end(), op_begin());
873 // Check that types match, unless this is an opaque struct.
874 if (auto *ST = dyn_cast<StructType>(T))
877 for (unsigned I = 0, E = V.size(); I != E; ++I)
878 assert(V[I]->getType() == T->getTypeAtIndex(I) &&
879 "Initializer for composite element doesn't match!");
882 ConstantArray::ConstantArray(ArrayType *T, ArrayRef<Constant *> V)
883 : ConstantAggregate(T, ConstantArrayVal, V) {
884 assert(V.size() == T->getNumElements() &&
885 "Invalid initializer for constant array");
888 Constant *ConstantArray::get(ArrayType *Ty, ArrayRef<Constant*> V) {
889 if (Constant *C = getImpl(Ty, V))
891 return Ty->getContext().pImpl->ArrayConstants.getOrCreate(Ty, V);
894 Constant *ConstantArray::getImpl(ArrayType *Ty, ArrayRef<Constant*> V) {
895 // Empty arrays are canonicalized to ConstantAggregateZero.
897 return ConstantAggregateZero::get(Ty);
899 for (unsigned i = 0, e = V.size(); i != e; ++i) {
900 assert(V[i]->getType() == Ty->getElementType() &&
901 "Wrong type in array element initializer");
904 // If this is an all-zero array, return a ConstantAggregateZero object. If
905 // all undef, return an UndefValue, if "all simple", then return a
906 // ConstantDataArray.
908 if (isa<UndefValue>(C) && rangeOnlyContains(V.begin(), V.end(), C))
909 return UndefValue::get(Ty);
911 if (C->isNullValue() && rangeOnlyContains(V.begin(), V.end(), C))
912 return ConstantAggregateZero::get(Ty);
914 // Check to see if all of the elements are ConstantFP or ConstantInt and if
915 // the element type is compatible with ConstantDataVector. If so, use it.
916 if (ConstantDataSequential::isElementTypeCompatible(C->getType()))
917 return getSequenceIfElementsMatch<ConstantDataArray>(C, V);
919 // Otherwise, we really do want to create a ConstantArray.
923 StructType *ConstantStruct::getTypeForElements(LLVMContext &Context,
924 ArrayRef<Constant*> V,
926 unsigned VecSize = V.size();
927 SmallVector<Type*, 16> EltTypes(VecSize);
928 for (unsigned i = 0; i != VecSize; ++i)
929 EltTypes[i] = V[i]->getType();
931 return StructType::get(Context, EltTypes, Packed);
935 StructType *ConstantStruct::getTypeForElements(ArrayRef<Constant*> V,
938 "ConstantStruct::getTypeForElements cannot be called on empty list");
939 return getTypeForElements(V[0]->getContext(), V, Packed);
942 ConstantStruct::ConstantStruct(StructType *T, ArrayRef<Constant *> V)
943 : ConstantAggregate(T, ConstantStructVal, V) {
944 assert((T->isOpaque() || V.size() == T->getNumElements()) &&
945 "Invalid initializer for constant struct");
948 // ConstantStruct accessors.
949 Constant *ConstantStruct::get(StructType *ST, ArrayRef<Constant*> V) {
950 assert((ST->isOpaque() || ST->getNumElements() == V.size()) &&
951 "Incorrect # elements specified to ConstantStruct::get");
953 // Create a ConstantAggregateZero value if all elements are zeros.
955 bool isUndef = false;
958 isUndef = isa<UndefValue>(V[0]);
959 isZero = V[0]->isNullValue();
960 if (isUndef || isZero) {
961 for (unsigned i = 0, e = V.size(); i != e; ++i) {
962 if (!V[i]->isNullValue())
964 if (!isa<UndefValue>(V[i]))
970 return ConstantAggregateZero::get(ST);
972 return UndefValue::get(ST);
974 return ST->getContext().pImpl->StructConstants.getOrCreate(ST, V);
977 Constant *ConstantStruct::get(StructType *T, ...) {
979 SmallVector<Constant*, 8> Values;
981 while (Constant *Val = va_arg(ap, llvm::Constant*))
982 Values.push_back(Val);
984 return get(T, Values);
987 ConstantVector::ConstantVector(VectorType *T, ArrayRef<Constant *> V)
988 : ConstantAggregate(T, ConstantVectorVal, V) {
989 assert(V.size() == T->getNumElements() &&
990 "Invalid initializer for constant vector");
993 // ConstantVector accessors.
994 Constant *ConstantVector::get(ArrayRef<Constant*> V) {
995 if (Constant *C = getImpl(V))
997 VectorType *Ty = VectorType::get(V.front()->getType(), V.size());
998 return Ty->getContext().pImpl->VectorConstants.getOrCreate(Ty, V);
1001 Constant *ConstantVector::getImpl(ArrayRef<Constant*> V) {
1002 assert(!V.empty() && "Vectors can't be empty");
1003 VectorType *T = VectorType::get(V.front()->getType(), V.size());
1005 // If this is an all-undef or all-zero vector, return a
1006 // ConstantAggregateZero or UndefValue.
1008 bool isZero = C->isNullValue();
1009 bool isUndef = isa<UndefValue>(C);
1011 if (isZero || isUndef) {
1012 for (unsigned i = 1, e = V.size(); i != e; ++i)
1014 isZero = isUndef = false;
1020 return ConstantAggregateZero::get(T);
1022 return UndefValue::get(T);
1024 // Check to see if all of the elements are ConstantFP or ConstantInt and if
1025 // the element type is compatible with ConstantDataVector. If so, use it.
1026 if (ConstantDataSequential::isElementTypeCompatible(C->getType()))
1027 return getSequenceIfElementsMatch<ConstantDataVector>(C, V);
1029 // Otherwise, the element type isn't compatible with ConstantDataVector, or
1030 // the operand list constants a ConstantExpr or something else strange.
1034 Constant *ConstantVector::getSplat(unsigned NumElts, Constant *V) {
1035 // If this splat is compatible with ConstantDataVector, use it instead of
1037 if ((isa<ConstantFP>(V) || isa<ConstantInt>(V)) &&
1038 ConstantDataSequential::isElementTypeCompatible(V->getType()))
1039 return ConstantDataVector::getSplat(NumElts, V);
1041 SmallVector<Constant*, 32> Elts(NumElts, V);
1045 ConstantTokenNone *ConstantTokenNone::get(LLVMContext &Context) {
1046 LLVMContextImpl *pImpl = Context.pImpl;
1047 if (!pImpl->TheNoneToken)
1048 pImpl->TheNoneToken.reset(new ConstantTokenNone(Context));
1049 return pImpl->TheNoneToken.get();
1052 /// Remove the constant from the constant table.
1053 void ConstantTokenNone::destroyConstantImpl() {
1054 llvm_unreachable("You can't ConstantTokenNone->destroyConstantImpl()!");
1057 // Utility function for determining if a ConstantExpr is a CastOp or not. This
1058 // can't be inline because we don't want to #include Instruction.h into
1060 bool ConstantExpr::isCast() const {
1061 return Instruction::isCast(getOpcode());
1064 bool ConstantExpr::isCompare() const {
1065 return getOpcode() == Instruction::ICmp || getOpcode() == Instruction::FCmp;
1068 bool ConstantExpr::isGEPWithNoNotionalOverIndexing() const {
1069 if (getOpcode() != Instruction::GetElementPtr) return false;
1071 gep_type_iterator GEPI = gep_type_begin(this), E = gep_type_end(this);
1072 User::const_op_iterator OI = std::next(this->op_begin());
1074 // The remaining indices may be compile-time known integers within the bounds
1075 // of the corresponding notional static array types.
1076 for (; GEPI != E; ++GEPI, ++OI) {
1077 if (isa<UndefValue>(*OI))
1079 auto *CI = dyn_cast<ConstantInt>(*OI);
1080 if (!CI || (GEPI.isBoundedSequential() &&
1081 (CI->getValue().getActiveBits() > 64 ||
1082 CI->getZExtValue() >= GEPI.getSequentialNumElements())))
1086 // All the indices checked out.
1090 bool ConstantExpr::hasIndices() const {
1091 return getOpcode() == Instruction::ExtractValue ||
1092 getOpcode() == Instruction::InsertValue;
1095 ArrayRef<unsigned> ConstantExpr::getIndices() const {
1096 if (const ExtractValueConstantExpr *EVCE =
1097 dyn_cast<ExtractValueConstantExpr>(this))
1098 return EVCE->Indices;
1100 return cast<InsertValueConstantExpr>(this)->Indices;
1103 unsigned ConstantExpr::getPredicate() const {
1104 return cast<CompareConstantExpr>(this)->predicate;
1108 ConstantExpr::getWithOperandReplaced(unsigned OpNo, Constant *Op) const {
1109 assert(Op->getType() == getOperand(OpNo)->getType() &&
1110 "Replacing operand with value of different type!");
1111 if (getOperand(OpNo) == Op)
1112 return const_cast<ConstantExpr*>(this);
1114 SmallVector<Constant*, 8> NewOps;
1115 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
1116 NewOps.push_back(i == OpNo ? Op : getOperand(i));
1118 return getWithOperands(NewOps);
1121 Constant *ConstantExpr::getWithOperands(ArrayRef<Constant *> Ops, Type *Ty,
1122 bool OnlyIfReduced, Type *SrcTy) const {
1123 assert(Ops.size() == getNumOperands() && "Operand count mismatch!");
1125 // If no operands changed return self.
1126 if (Ty == getType() && std::equal(Ops.begin(), Ops.end(), op_begin()))
1127 return const_cast<ConstantExpr*>(this);
1129 Type *OnlyIfReducedTy = OnlyIfReduced ? Ty : nullptr;
1130 switch (getOpcode()) {
1131 case Instruction::Trunc:
1132 case Instruction::ZExt:
1133 case Instruction::SExt:
1134 case Instruction::FPTrunc:
1135 case Instruction::FPExt:
1136 case Instruction::UIToFP:
1137 case Instruction::SIToFP:
1138 case Instruction::FPToUI:
1139 case Instruction::FPToSI:
1140 case Instruction::PtrToInt:
1141 case Instruction::IntToPtr:
1142 case Instruction::BitCast:
1143 case Instruction::AddrSpaceCast:
1144 return ConstantExpr::getCast(getOpcode(), Ops[0], Ty, OnlyIfReduced);
1145 case Instruction::Select:
1146 return ConstantExpr::getSelect(Ops[0], Ops[1], Ops[2], OnlyIfReducedTy);
1147 case Instruction::InsertElement:
1148 return ConstantExpr::getInsertElement(Ops[0], Ops[1], Ops[2],
1150 case Instruction::ExtractElement:
1151 return ConstantExpr::getExtractElement(Ops[0], Ops[1], OnlyIfReducedTy);
1152 case Instruction::InsertValue:
1153 return ConstantExpr::getInsertValue(Ops[0], Ops[1], getIndices(),
1155 case Instruction::ExtractValue:
1156 return ConstantExpr::getExtractValue(Ops[0], getIndices(), OnlyIfReducedTy);
1157 case Instruction::ShuffleVector:
1158 return ConstantExpr::getShuffleVector(Ops[0], Ops[1], Ops[2],
1160 case Instruction::GetElementPtr: {
1161 auto *GEPO = cast<GEPOperator>(this);
1162 assert(SrcTy || (Ops[0]->getType() == getOperand(0)->getType()));
1163 return ConstantExpr::getGetElementPtr(
1164 SrcTy ? SrcTy : GEPO->getSourceElementType(), Ops[0], Ops.slice(1),
1165 GEPO->isInBounds(), GEPO->getInRangeIndex(), OnlyIfReducedTy);
1167 case Instruction::ICmp:
1168 case Instruction::FCmp:
1169 return ConstantExpr::getCompare(getPredicate(), Ops[0], Ops[1],
1172 assert(getNumOperands() == 2 && "Must be binary operator?");
1173 return ConstantExpr::get(getOpcode(), Ops[0], Ops[1], SubclassOptionalData,
1179 //===----------------------------------------------------------------------===//
1180 // isValueValidForType implementations
1182 bool ConstantInt::isValueValidForType(Type *Ty, uint64_t Val) {
1183 unsigned NumBits = Ty->getIntegerBitWidth(); // assert okay
1184 if (Ty->isIntegerTy(1))
1185 return Val == 0 || Val == 1;
1187 return true; // always true, has to fit in largest type
1188 uint64_t Max = (1ll << NumBits) - 1;
1192 bool ConstantInt::isValueValidForType(Type *Ty, int64_t Val) {
1193 unsigned NumBits = Ty->getIntegerBitWidth();
1194 if (Ty->isIntegerTy(1))
1195 return Val == 0 || Val == 1 || Val == -1;
1197 return true; // always true, has to fit in largest type
1198 int64_t Min = -(1ll << (NumBits-1));
1199 int64_t Max = (1ll << (NumBits-1)) - 1;
1200 return (Val >= Min && Val <= Max);
1203 bool ConstantFP::isValueValidForType(Type *Ty, const APFloat& Val) {
1204 // convert modifies in place, so make a copy.
1205 APFloat Val2 = APFloat(Val);
1207 switch (Ty->getTypeID()) {
1209 return false; // These can't be represented as floating point!
1211 // FIXME rounding mode needs to be more flexible
1212 case Type::HalfTyID: {
1213 if (&Val2.getSemantics() == &APFloat::IEEEhalf())
1215 Val2.convert(APFloat::IEEEhalf(), APFloat::rmNearestTiesToEven, &losesInfo);
1218 case Type::FloatTyID: {
1219 if (&Val2.getSemantics() == &APFloat::IEEEsingle())
1221 Val2.convert(APFloat::IEEEsingle(), APFloat::rmNearestTiesToEven, &losesInfo);
1224 case Type::DoubleTyID: {
1225 if (&Val2.getSemantics() == &APFloat::IEEEhalf() ||
1226 &Val2.getSemantics() == &APFloat::IEEEsingle() ||
1227 &Val2.getSemantics() == &APFloat::IEEEdouble())
1229 Val2.convert(APFloat::IEEEdouble(), APFloat::rmNearestTiesToEven, &losesInfo);
1232 case Type::X86_FP80TyID:
1233 return &Val2.getSemantics() == &APFloat::IEEEhalf() ||
1234 &Val2.getSemantics() == &APFloat::IEEEsingle() ||
1235 &Val2.getSemantics() == &APFloat::IEEEdouble() ||
1236 &Val2.getSemantics() == &APFloat::x87DoubleExtended();
1237 case Type::FP128TyID:
1238 return &Val2.getSemantics() == &APFloat::IEEEhalf() ||
1239 &Val2.getSemantics() == &APFloat::IEEEsingle() ||
1240 &Val2.getSemantics() == &APFloat::IEEEdouble() ||
1241 &Val2.getSemantics() == &APFloat::IEEEquad();
1242 case Type::PPC_FP128TyID:
1243 return &Val2.getSemantics() == &APFloat::IEEEhalf() ||
1244 &Val2.getSemantics() == &APFloat::IEEEsingle() ||
1245 &Val2.getSemantics() == &APFloat::IEEEdouble() ||
1246 &Val2.getSemantics() == &APFloat::PPCDoubleDouble();
1251 //===----------------------------------------------------------------------===//
1252 // Factory Function Implementation
1254 ConstantAggregateZero *ConstantAggregateZero::get(Type *Ty) {
1255 assert((Ty->isStructTy() || Ty->isArrayTy() || Ty->isVectorTy()) &&
1256 "Cannot create an aggregate zero of non-aggregate type!");
1258 std::unique_ptr<ConstantAggregateZero> &Entry =
1259 Ty->getContext().pImpl->CAZConstants[Ty];
1261 Entry.reset(new ConstantAggregateZero(Ty));
1266 /// Remove the constant from the constant table.
1267 void ConstantAggregateZero::destroyConstantImpl() {
1268 getContext().pImpl->CAZConstants.erase(getType());
1271 /// Remove the constant from the constant table.
1272 void ConstantArray::destroyConstantImpl() {
1273 getType()->getContext().pImpl->ArrayConstants.remove(this);
1277 //---- ConstantStruct::get() implementation...
1280 /// Remove the constant from the constant table.
1281 void ConstantStruct::destroyConstantImpl() {
1282 getType()->getContext().pImpl->StructConstants.remove(this);
1285 /// Remove the constant from the constant table.
1286 void ConstantVector::destroyConstantImpl() {
1287 getType()->getContext().pImpl->VectorConstants.remove(this);
1290 Constant *Constant::getSplatValue() const {
1291 assert(this->getType()->isVectorTy() && "Only valid for vectors!");
1292 if (isa<ConstantAggregateZero>(this))
1293 return getNullValue(this->getType()->getVectorElementType());
1294 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
1295 return CV->getSplatValue();
1296 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
1297 return CV->getSplatValue();
1301 Constant *ConstantVector::getSplatValue() const {
1302 // Check out first element.
1303 Constant *Elt = getOperand(0);
1304 // Then make sure all remaining elements point to the same value.
1305 for (unsigned I = 1, E = getNumOperands(); I < E; ++I)
1306 if (getOperand(I) != Elt)
1311 const APInt &Constant::getUniqueInteger() const {
1312 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
1313 return CI->getValue();
1314 assert(this->getSplatValue() && "Doesn't contain a unique integer!");
1315 const Constant *C = this->getAggregateElement(0U);
1316 assert(C && isa<ConstantInt>(C) && "Not a vector of numbers!");
1317 return cast<ConstantInt>(C)->getValue();
1320 //---- ConstantPointerNull::get() implementation.
1323 ConstantPointerNull *ConstantPointerNull::get(PointerType *Ty) {
1324 std::unique_ptr<ConstantPointerNull> &Entry =
1325 Ty->getContext().pImpl->CPNConstants[Ty];
1327 Entry.reset(new ConstantPointerNull(Ty));
1332 /// Remove the constant from the constant table.
1333 void ConstantPointerNull::destroyConstantImpl() {
1334 getContext().pImpl->CPNConstants.erase(getType());
1337 UndefValue *UndefValue::get(Type *Ty) {
1338 std::unique_ptr<UndefValue> &Entry = Ty->getContext().pImpl->UVConstants[Ty];
1340 Entry.reset(new UndefValue(Ty));
1345 /// Remove the constant from the constant table.
1346 void UndefValue::destroyConstantImpl() {
1347 // Free the constant and any dangling references to it.
1348 getContext().pImpl->UVConstants.erase(getType());
1351 BlockAddress *BlockAddress::get(BasicBlock *BB) {
1352 assert(BB->getParent() && "Block must have a parent");
1353 return get(BB->getParent(), BB);
1356 BlockAddress *BlockAddress::get(Function *F, BasicBlock *BB) {
1358 F->getContext().pImpl->BlockAddresses[std::make_pair(F, BB)];
1360 BA = new BlockAddress(F, BB);
1362 assert(BA->getFunction() == F && "Basic block moved between functions");
1366 BlockAddress::BlockAddress(Function *F, BasicBlock *BB)
1367 : Constant(Type::getInt8PtrTy(F->getContext()), Value::BlockAddressVal,
1371 BB->AdjustBlockAddressRefCount(1);
1374 BlockAddress *BlockAddress::lookup(const BasicBlock *BB) {
1375 if (!BB->hasAddressTaken())
1378 const Function *F = BB->getParent();
1379 assert(F && "Block must have a parent");
1381 F->getContext().pImpl->BlockAddresses.lookup(std::make_pair(F, BB));
1382 assert(BA && "Refcount and block address map disagree!");
1386 /// Remove the constant from the constant table.
1387 void BlockAddress::destroyConstantImpl() {
1388 getFunction()->getType()->getContext().pImpl
1389 ->BlockAddresses.erase(std::make_pair(getFunction(), getBasicBlock()));
1390 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1393 Value *BlockAddress::handleOperandChangeImpl(Value *From, Value *To) {
1394 // This could be replacing either the Basic Block or the Function. In either
1395 // case, we have to remove the map entry.
1396 Function *NewF = getFunction();
1397 BasicBlock *NewBB = getBasicBlock();
1400 NewF = cast<Function>(To->stripPointerCasts());
1402 assert(From == NewBB && "From does not match any operand");
1403 NewBB = cast<BasicBlock>(To);
1406 // See if the 'new' entry already exists, if not, just update this in place
1407 // and return early.
1408 BlockAddress *&NewBA =
1409 getContext().pImpl->BlockAddresses[std::make_pair(NewF, NewBB)];
1413 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1415 // Remove the old entry, this can't cause the map to rehash (just a
1416 // tombstone will get added).
1417 getContext().pImpl->BlockAddresses.erase(std::make_pair(getFunction(),
1420 setOperand(0, NewF);
1421 setOperand(1, NewBB);
1422 getBasicBlock()->AdjustBlockAddressRefCount(1);
1424 // If we just want to keep the existing value, then return null.
1425 // Callers know that this means we shouldn't delete this value.
1429 //---- ConstantExpr::get() implementations.
1432 /// This is a utility function to handle folding of casts and lookup of the
1433 /// cast in the ExprConstants map. It is used by the various get* methods below.
1434 static Constant *getFoldedCast(Instruction::CastOps opc, Constant *C, Type *Ty,
1435 bool OnlyIfReduced = false) {
1436 assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
1437 // Fold a few common cases
1438 if (Constant *FC = ConstantFoldCastInstruction(opc, C, Ty))
1444 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
1446 // Look up the constant in the table first to ensure uniqueness.
1447 ConstantExprKeyType Key(opc, C);
1449 return pImpl->ExprConstants.getOrCreate(Ty, Key);
1452 Constant *ConstantExpr::getCast(unsigned oc, Constant *C, Type *Ty,
1453 bool OnlyIfReduced) {
1454 Instruction::CastOps opc = Instruction::CastOps(oc);
1455 assert(Instruction::isCast(opc) && "opcode out of range");
1456 assert(C && Ty && "Null arguments to getCast");
1457 assert(CastInst::castIsValid(opc, C, Ty) && "Invalid constantexpr cast!");
1461 llvm_unreachable("Invalid cast opcode");
1462 case Instruction::Trunc:
1463 return getTrunc(C, Ty, OnlyIfReduced);
1464 case Instruction::ZExt:
1465 return getZExt(C, Ty, OnlyIfReduced);
1466 case Instruction::SExt:
1467 return getSExt(C, Ty, OnlyIfReduced);
1468 case Instruction::FPTrunc:
1469 return getFPTrunc(C, Ty, OnlyIfReduced);
1470 case Instruction::FPExt:
1471 return getFPExtend(C, Ty, OnlyIfReduced);
1472 case Instruction::UIToFP:
1473 return getUIToFP(C, Ty, OnlyIfReduced);
1474 case Instruction::SIToFP:
1475 return getSIToFP(C, Ty, OnlyIfReduced);
1476 case Instruction::FPToUI:
1477 return getFPToUI(C, Ty, OnlyIfReduced);
1478 case Instruction::FPToSI:
1479 return getFPToSI(C, Ty, OnlyIfReduced);
1480 case Instruction::PtrToInt:
1481 return getPtrToInt(C, Ty, OnlyIfReduced);
1482 case Instruction::IntToPtr:
1483 return getIntToPtr(C, Ty, OnlyIfReduced);
1484 case Instruction::BitCast:
1485 return getBitCast(C, Ty, OnlyIfReduced);
1486 case Instruction::AddrSpaceCast:
1487 return getAddrSpaceCast(C, Ty, OnlyIfReduced);
1491 Constant *ConstantExpr::getZExtOrBitCast(Constant *C, Type *Ty) {
1492 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1493 return getBitCast(C, Ty);
1494 return getZExt(C, Ty);
1497 Constant *ConstantExpr::getSExtOrBitCast(Constant *C, Type *Ty) {
1498 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1499 return getBitCast(C, Ty);
1500 return getSExt(C, Ty);
1503 Constant *ConstantExpr::getTruncOrBitCast(Constant *C, Type *Ty) {
1504 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1505 return getBitCast(C, Ty);
1506 return getTrunc(C, Ty);
1509 Constant *ConstantExpr::getPointerCast(Constant *S, Type *Ty) {
1510 assert(S->getType()->isPtrOrPtrVectorTy() && "Invalid cast");
1511 assert((Ty->isIntOrIntVectorTy() || Ty->isPtrOrPtrVectorTy()) &&
1514 if (Ty->isIntOrIntVectorTy())
1515 return getPtrToInt(S, Ty);
1517 unsigned SrcAS = S->getType()->getPointerAddressSpace();
1518 if (Ty->isPtrOrPtrVectorTy() && SrcAS != Ty->getPointerAddressSpace())
1519 return getAddrSpaceCast(S, Ty);
1521 return getBitCast(S, Ty);
1524 Constant *ConstantExpr::getPointerBitCastOrAddrSpaceCast(Constant *S,
1526 assert(S->getType()->isPtrOrPtrVectorTy() && "Invalid cast");
1527 assert(Ty->isPtrOrPtrVectorTy() && "Invalid cast");
1529 if (S->getType()->getPointerAddressSpace() != Ty->getPointerAddressSpace())
1530 return getAddrSpaceCast(S, Ty);
1532 return getBitCast(S, Ty);
1535 Constant *ConstantExpr::getIntegerCast(Constant *C, Type *Ty, bool isSigned) {
1536 assert(C->getType()->isIntOrIntVectorTy() &&
1537 Ty->isIntOrIntVectorTy() && "Invalid cast");
1538 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1539 unsigned DstBits = Ty->getScalarSizeInBits();
1540 Instruction::CastOps opcode =
1541 (SrcBits == DstBits ? Instruction::BitCast :
1542 (SrcBits > DstBits ? Instruction::Trunc :
1543 (isSigned ? Instruction::SExt : Instruction::ZExt)));
1544 return getCast(opcode, C, Ty);
1547 Constant *ConstantExpr::getFPCast(Constant *C, Type *Ty) {
1548 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1550 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1551 unsigned DstBits = Ty->getScalarSizeInBits();
1552 if (SrcBits == DstBits)
1553 return C; // Avoid a useless cast
1554 Instruction::CastOps opcode =
1555 (SrcBits > DstBits ? Instruction::FPTrunc : Instruction::FPExt);
1556 return getCast(opcode, C, Ty);
1559 Constant *ConstantExpr::getTrunc(Constant *C, Type *Ty, bool OnlyIfReduced) {
1561 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1562 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1564 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1565 assert(C->getType()->isIntOrIntVectorTy() && "Trunc operand must be integer");
1566 assert(Ty->isIntOrIntVectorTy() && "Trunc produces only integral");
1567 assert(C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1568 "SrcTy must be larger than DestTy for Trunc!");
1570 return getFoldedCast(Instruction::Trunc, C, Ty, OnlyIfReduced);
1573 Constant *ConstantExpr::getSExt(Constant *C, Type *Ty, bool OnlyIfReduced) {
1575 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1576 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1578 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1579 assert(C->getType()->isIntOrIntVectorTy() && "SExt operand must be integral");
1580 assert(Ty->isIntOrIntVectorTy() && "SExt produces only integer");
1581 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1582 "SrcTy must be smaller than DestTy for SExt!");
1584 return getFoldedCast(Instruction::SExt, C, Ty, OnlyIfReduced);
1587 Constant *ConstantExpr::getZExt(Constant *C, Type *Ty, bool OnlyIfReduced) {
1589 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1590 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1592 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1593 assert(C->getType()->isIntOrIntVectorTy() && "ZEXt operand must be integral");
1594 assert(Ty->isIntOrIntVectorTy() && "ZExt produces only integer");
1595 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1596 "SrcTy must be smaller than DestTy for ZExt!");
1598 return getFoldedCast(Instruction::ZExt, C, Ty, OnlyIfReduced);
1601 Constant *ConstantExpr::getFPTrunc(Constant *C, Type *Ty, bool OnlyIfReduced) {
1603 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1604 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1606 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1607 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1608 C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1609 "This is an illegal floating point truncation!");
1610 return getFoldedCast(Instruction::FPTrunc, C, Ty, OnlyIfReduced);
1613 Constant *ConstantExpr::getFPExtend(Constant *C, Type *Ty, bool OnlyIfReduced) {
1615 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1616 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1618 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1619 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1620 C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1621 "This is an illegal floating point extension!");
1622 return getFoldedCast(Instruction::FPExt, C, Ty, OnlyIfReduced);
1625 Constant *ConstantExpr::getUIToFP(Constant *C, Type *Ty, bool OnlyIfReduced) {
1627 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1628 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1630 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1631 assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1632 "This is an illegal uint to floating point cast!");
1633 return getFoldedCast(Instruction::UIToFP, C, Ty, OnlyIfReduced);
1636 Constant *ConstantExpr::getSIToFP(Constant *C, Type *Ty, bool OnlyIfReduced) {
1638 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1639 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1641 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1642 assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1643 "This is an illegal sint to floating point cast!");
1644 return getFoldedCast(Instruction::SIToFP, C, Ty, OnlyIfReduced);
1647 Constant *ConstantExpr::getFPToUI(Constant *C, Type *Ty, bool OnlyIfReduced) {
1649 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1650 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1652 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1653 assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1654 "This is an illegal floating point to uint cast!");
1655 return getFoldedCast(Instruction::FPToUI, C, Ty, OnlyIfReduced);
1658 Constant *ConstantExpr::getFPToSI(Constant *C, Type *Ty, bool OnlyIfReduced) {
1660 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1661 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1663 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1664 assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1665 "This is an illegal floating point to sint cast!");
1666 return getFoldedCast(Instruction::FPToSI, C, Ty, OnlyIfReduced);
1669 Constant *ConstantExpr::getPtrToInt(Constant *C, Type *DstTy,
1670 bool OnlyIfReduced) {
1671 assert(C->getType()->getScalarType()->isPointerTy() &&
1672 "PtrToInt source must be pointer or pointer vector");
1673 assert(DstTy->getScalarType()->isIntegerTy() &&
1674 "PtrToInt destination must be integer or integer vector");
1675 assert(isa<VectorType>(C->getType()) == isa<VectorType>(DstTy));
1676 if (isa<VectorType>(C->getType()))
1677 assert(C->getType()->getVectorNumElements()==DstTy->getVectorNumElements()&&
1678 "Invalid cast between a different number of vector elements");
1679 return getFoldedCast(Instruction::PtrToInt, C, DstTy, OnlyIfReduced);
1682 Constant *ConstantExpr::getIntToPtr(Constant *C, Type *DstTy,
1683 bool OnlyIfReduced) {
1684 assert(C->getType()->getScalarType()->isIntegerTy() &&
1685 "IntToPtr source must be integer or integer vector");
1686 assert(DstTy->getScalarType()->isPointerTy() &&
1687 "IntToPtr destination must be a pointer or pointer vector");
1688 assert(isa<VectorType>(C->getType()) == isa<VectorType>(DstTy));
1689 if (isa<VectorType>(C->getType()))
1690 assert(C->getType()->getVectorNumElements()==DstTy->getVectorNumElements()&&
1691 "Invalid cast between a different number of vector elements");
1692 return getFoldedCast(Instruction::IntToPtr, C, DstTy, OnlyIfReduced);
1695 Constant *ConstantExpr::getBitCast(Constant *C, Type *DstTy,
1696 bool OnlyIfReduced) {
1697 assert(CastInst::castIsValid(Instruction::BitCast, C, DstTy) &&
1698 "Invalid constantexpr bitcast!");
1700 // It is common to ask for a bitcast of a value to its own type, handle this
1702 if (C->getType() == DstTy) return C;
1704 return getFoldedCast(Instruction::BitCast, C, DstTy, OnlyIfReduced);
1707 Constant *ConstantExpr::getAddrSpaceCast(Constant *C, Type *DstTy,
1708 bool OnlyIfReduced) {
1709 assert(CastInst::castIsValid(Instruction::AddrSpaceCast, C, DstTy) &&
1710 "Invalid constantexpr addrspacecast!");
1712 // Canonicalize addrspacecasts between different pointer types by first
1713 // bitcasting the pointer type and then converting the address space.
1714 PointerType *SrcScalarTy = cast<PointerType>(C->getType()->getScalarType());
1715 PointerType *DstScalarTy = cast<PointerType>(DstTy->getScalarType());
1716 Type *DstElemTy = DstScalarTy->getElementType();
1717 if (SrcScalarTy->getElementType() != DstElemTy) {
1718 Type *MidTy = PointerType::get(DstElemTy, SrcScalarTy->getAddressSpace());
1719 if (VectorType *VT = dyn_cast<VectorType>(DstTy)) {
1720 // Handle vectors of pointers.
1721 MidTy = VectorType::get(MidTy, VT->getNumElements());
1723 C = getBitCast(C, MidTy);
1725 return getFoldedCast(Instruction::AddrSpaceCast, C, DstTy, OnlyIfReduced);
1728 Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2,
1729 unsigned Flags, Type *OnlyIfReducedTy) {
1730 // Check the operands for consistency first.
1731 assert(Opcode >= Instruction::BinaryOpsBegin &&
1732 Opcode < Instruction::BinaryOpsEnd &&
1733 "Invalid opcode in binary constant expression");
1734 assert(C1->getType() == C2->getType() &&
1735 "Operand types in binary constant expression should match");
1739 case Instruction::Add:
1740 case Instruction::Sub:
1741 case Instruction::Mul:
1742 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1743 assert(C1->getType()->isIntOrIntVectorTy() &&
1744 "Tried to create an integer operation on a non-integer type!");
1746 case Instruction::FAdd:
1747 case Instruction::FSub:
1748 case Instruction::FMul:
1749 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1750 assert(C1->getType()->isFPOrFPVectorTy() &&
1751 "Tried to create a floating-point operation on a "
1752 "non-floating-point type!");
1754 case Instruction::UDiv:
1755 case Instruction::SDiv:
1756 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1757 assert(C1->getType()->isIntOrIntVectorTy() &&
1758 "Tried to create an arithmetic operation on a non-arithmetic type!");
1760 case Instruction::FDiv:
1761 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1762 assert(C1->getType()->isFPOrFPVectorTy() &&
1763 "Tried to create an arithmetic operation on a non-arithmetic type!");
1765 case Instruction::URem:
1766 case Instruction::SRem:
1767 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1768 assert(C1->getType()->isIntOrIntVectorTy() &&
1769 "Tried to create an arithmetic operation on a non-arithmetic type!");
1771 case Instruction::FRem:
1772 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1773 assert(C1->getType()->isFPOrFPVectorTy() &&
1774 "Tried to create an arithmetic operation on a non-arithmetic type!");
1776 case Instruction::And:
1777 case Instruction::Or:
1778 case Instruction::Xor:
1779 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1780 assert(C1->getType()->isIntOrIntVectorTy() &&
1781 "Tried to create a logical operation on a non-integral type!");
1783 case Instruction::Shl:
1784 case Instruction::LShr:
1785 case Instruction::AShr:
1786 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1787 assert(C1->getType()->isIntOrIntVectorTy() &&
1788 "Tried to create a shift operation on a non-integer type!");
1795 if (Constant *FC = ConstantFoldBinaryInstruction(Opcode, C1, C2))
1796 return FC; // Fold a few common cases.
1798 if (OnlyIfReducedTy == C1->getType())
1801 Constant *ArgVec[] = { C1, C2 };
1802 ConstantExprKeyType Key(Opcode, ArgVec, 0, Flags);
1804 LLVMContextImpl *pImpl = C1->getContext().pImpl;
1805 return pImpl->ExprConstants.getOrCreate(C1->getType(), Key);
1808 Constant *ConstantExpr::getSizeOf(Type* Ty) {
1809 // sizeof is implemented as: (i64) gep (Ty*)null, 1
1810 // Note that a non-inbounds gep is used, as null isn't within any object.
1811 Constant *GEPIdx = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1812 Constant *GEP = getGetElementPtr(
1813 Ty, Constant::getNullValue(PointerType::getUnqual(Ty)), GEPIdx);
1814 return getPtrToInt(GEP,
1815 Type::getInt64Ty(Ty->getContext()));
1818 Constant *ConstantExpr::getAlignOf(Type* Ty) {
1819 // alignof is implemented as: (i64) gep ({i1,Ty}*)null, 0, 1
1820 // Note that a non-inbounds gep is used, as null isn't within any object.
1822 StructType::get(Type::getInt1Ty(Ty->getContext()), Ty, nullptr);
1823 Constant *NullPtr = Constant::getNullValue(AligningTy->getPointerTo(0));
1824 Constant *Zero = ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0);
1825 Constant *One = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1826 Constant *Indices[2] = { Zero, One };
1827 Constant *GEP = getGetElementPtr(AligningTy, NullPtr, Indices);
1828 return getPtrToInt(GEP,
1829 Type::getInt64Ty(Ty->getContext()));
1832 Constant *ConstantExpr::getOffsetOf(StructType* STy, unsigned FieldNo) {
1833 return getOffsetOf(STy, ConstantInt::get(Type::getInt32Ty(STy->getContext()),
1837 Constant *ConstantExpr::getOffsetOf(Type* Ty, Constant *FieldNo) {
1838 // offsetof is implemented as: (i64) gep (Ty*)null, 0, FieldNo
1839 // Note that a non-inbounds gep is used, as null isn't within any object.
1840 Constant *GEPIdx[] = {
1841 ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0),
1844 Constant *GEP = getGetElementPtr(
1845 Ty, Constant::getNullValue(PointerType::getUnqual(Ty)), GEPIdx);
1846 return getPtrToInt(GEP,
1847 Type::getInt64Ty(Ty->getContext()));
1850 Constant *ConstantExpr::getCompare(unsigned short Predicate, Constant *C1,
1851 Constant *C2, bool OnlyIfReduced) {
1852 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1854 switch (Predicate) {
1855 default: llvm_unreachable("Invalid CmpInst predicate");
1856 case CmpInst::FCMP_FALSE: case CmpInst::FCMP_OEQ: case CmpInst::FCMP_OGT:
1857 case CmpInst::FCMP_OGE: case CmpInst::FCMP_OLT: case CmpInst::FCMP_OLE:
1858 case CmpInst::FCMP_ONE: case CmpInst::FCMP_ORD: case CmpInst::FCMP_UNO:
1859 case CmpInst::FCMP_UEQ: case CmpInst::FCMP_UGT: case CmpInst::FCMP_UGE:
1860 case CmpInst::FCMP_ULT: case CmpInst::FCMP_ULE: case CmpInst::FCMP_UNE:
1861 case CmpInst::FCMP_TRUE:
1862 return getFCmp(Predicate, C1, C2, OnlyIfReduced);
1864 case CmpInst::ICMP_EQ: case CmpInst::ICMP_NE: case CmpInst::ICMP_UGT:
1865 case CmpInst::ICMP_UGE: case CmpInst::ICMP_ULT: case CmpInst::ICMP_ULE:
1866 case CmpInst::ICMP_SGT: case CmpInst::ICMP_SGE: case CmpInst::ICMP_SLT:
1867 case CmpInst::ICMP_SLE:
1868 return getICmp(Predicate, C1, C2, OnlyIfReduced);
1872 Constant *ConstantExpr::getSelect(Constant *C, Constant *V1, Constant *V2,
1873 Type *OnlyIfReducedTy) {
1874 assert(!SelectInst::areInvalidOperands(C, V1, V2)&&"Invalid select operands");
1876 if (Constant *SC = ConstantFoldSelectInstruction(C, V1, V2))
1877 return SC; // Fold common cases
1879 if (OnlyIfReducedTy == V1->getType())
1882 Constant *ArgVec[] = { C, V1, V2 };
1883 ConstantExprKeyType Key(Instruction::Select, ArgVec);
1885 LLVMContextImpl *pImpl = C->getContext().pImpl;
1886 return pImpl->ExprConstants.getOrCreate(V1->getType(), Key);
1889 Constant *ConstantExpr::getGetElementPtr(Type *Ty, Constant *C,
1890 ArrayRef<Value *> Idxs, bool InBounds,
1891 Optional<unsigned> InRangeIndex,
1892 Type *OnlyIfReducedTy) {
1894 Ty = cast<PointerType>(C->getType()->getScalarType())->getElementType();
1898 cast<PointerType>(C->getType()->getScalarType())->getContainedType(0u));
1901 ConstantFoldGetElementPtr(Ty, C, InBounds, InRangeIndex, Idxs))
1902 return FC; // Fold a few common cases.
1904 // Get the result type of the getelementptr!
1905 Type *DestTy = GetElementPtrInst::getIndexedType(Ty, Idxs);
1906 assert(DestTy && "GEP indices invalid!");
1907 unsigned AS = C->getType()->getPointerAddressSpace();
1908 Type *ReqTy = DestTy->getPointerTo(AS);
1910 unsigned NumVecElts = 0;
1911 if (C->getType()->isVectorTy())
1912 NumVecElts = C->getType()->getVectorNumElements();
1913 else for (auto Idx : Idxs)
1914 if (Idx->getType()->isVectorTy())
1915 NumVecElts = Idx->getType()->getVectorNumElements();
1918 ReqTy = VectorType::get(ReqTy, NumVecElts);
1920 if (OnlyIfReducedTy == ReqTy)
1923 // Look up the constant in the table first to ensure uniqueness
1924 std::vector<Constant*> ArgVec;
1925 ArgVec.reserve(1 + Idxs.size());
1926 ArgVec.push_back(C);
1927 for (unsigned i = 0, e = Idxs.size(); i != e; ++i) {
1928 assert((!Idxs[i]->getType()->isVectorTy() ||
1929 Idxs[i]->getType()->getVectorNumElements() == NumVecElts) &&
1930 "getelementptr index type missmatch");
1932 Constant *Idx = cast<Constant>(Idxs[i]);
1933 if (NumVecElts && !Idxs[i]->getType()->isVectorTy())
1934 Idx = ConstantVector::getSplat(NumVecElts, Idx);
1935 ArgVec.push_back(Idx);
1938 unsigned SubClassOptionalData = InBounds ? GEPOperator::IsInBounds : 0;
1939 if (InRangeIndex && *InRangeIndex < 63)
1940 SubClassOptionalData |= (*InRangeIndex + 1) << 1;
1941 const ConstantExprKeyType Key(Instruction::GetElementPtr, ArgVec, 0,
1942 SubClassOptionalData, None, Ty);
1944 LLVMContextImpl *pImpl = C->getContext().pImpl;
1945 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
1948 Constant *ConstantExpr::getICmp(unsigned short pred, Constant *LHS,
1949 Constant *RHS, bool OnlyIfReduced) {
1950 assert(LHS->getType() == RHS->getType());
1951 assert(pred >= ICmpInst::FIRST_ICMP_PREDICATE &&
1952 pred <= ICmpInst::LAST_ICMP_PREDICATE && "Invalid ICmp Predicate");
1954 if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
1955 return FC; // Fold a few common cases...
1960 // Look up the constant in the table first to ensure uniqueness
1961 Constant *ArgVec[] = { LHS, RHS };
1962 // Get the key type with both the opcode and predicate
1963 const ConstantExprKeyType Key(Instruction::ICmp, ArgVec, pred);
1965 Type *ResultTy = Type::getInt1Ty(LHS->getContext());
1966 if (VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
1967 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
1969 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
1970 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
1973 Constant *ConstantExpr::getFCmp(unsigned short pred, Constant *LHS,
1974 Constant *RHS, bool OnlyIfReduced) {
1975 assert(LHS->getType() == RHS->getType());
1976 assert(pred <= FCmpInst::LAST_FCMP_PREDICATE && "Invalid FCmp Predicate");
1978 if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
1979 return FC; // Fold a few common cases...
1984 // Look up the constant in the table first to ensure uniqueness
1985 Constant *ArgVec[] = { LHS, RHS };
1986 // Get the key type with both the opcode and predicate
1987 const ConstantExprKeyType Key(Instruction::FCmp, ArgVec, pred);
1989 Type *ResultTy = Type::getInt1Ty(LHS->getContext());
1990 if (VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
1991 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
1993 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
1994 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
1997 Constant *ConstantExpr::getExtractElement(Constant *Val, Constant *Idx,
1998 Type *OnlyIfReducedTy) {
1999 assert(Val->getType()->isVectorTy() &&
2000 "Tried to create extractelement operation on non-vector type!");
2001 assert(Idx->getType()->isIntegerTy() &&
2002 "Extractelement index must be an integer type!");
2004 if (Constant *FC = ConstantFoldExtractElementInstruction(Val, Idx))
2005 return FC; // Fold a few common cases.
2007 Type *ReqTy = Val->getType()->getVectorElementType();
2008 if (OnlyIfReducedTy == ReqTy)
2011 // Look up the constant in the table first to ensure uniqueness
2012 Constant *ArgVec[] = { Val, Idx };
2013 const ConstantExprKeyType Key(Instruction::ExtractElement, ArgVec);
2015 LLVMContextImpl *pImpl = Val->getContext().pImpl;
2016 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2019 Constant *ConstantExpr::getInsertElement(Constant *Val, Constant *Elt,
2020 Constant *Idx, Type *OnlyIfReducedTy) {
2021 assert(Val->getType()->isVectorTy() &&
2022 "Tried to create insertelement operation on non-vector type!");
2023 assert(Elt->getType() == Val->getType()->getVectorElementType() &&
2024 "Insertelement types must match!");
2025 assert(Idx->getType()->isIntegerTy() &&
2026 "Insertelement index must be i32 type!");
2028 if (Constant *FC = ConstantFoldInsertElementInstruction(Val, Elt, Idx))
2029 return FC; // Fold a few common cases.
2031 if (OnlyIfReducedTy == Val->getType())
2034 // Look up the constant in the table first to ensure uniqueness
2035 Constant *ArgVec[] = { Val, Elt, Idx };
2036 const ConstantExprKeyType Key(Instruction::InsertElement, ArgVec);
2038 LLVMContextImpl *pImpl = Val->getContext().pImpl;
2039 return pImpl->ExprConstants.getOrCreate(Val->getType(), Key);
2042 Constant *ConstantExpr::getShuffleVector(Constant *V1, Constant *V2,
2043 Constant *Mask, Type *OnlyIfReducedTy) {
2044 assert(ShuffleVectorInst::isValidOperands(V1, V2, Mask) &&
2045 "Invalid shuffle vector constant expr operands!");
2047 if (Constant *FC = ConstantFoldShuffleVectorInstruction(V1, V2, Mask))
2048 return FC; // Fold a few common cases.
2050 unsigned NElts = Mask->getType()->getVectorNumElements();
2051 Type *EltTy = V1->getType()->getVectorElementType();
2052 Type *ShufTy = VectorType::get(EltTy, NElts);
2054 if (OnlyIfReducedTy == ShufTy)
2057 // Look up the constant in the table first to ensure uniqueness
2058 Constant *ArgVec[] = { V1, V2, Mask };
2059 const ConstantExprKeyType Key(Instruction::ShuffleVector, ArgVec);
2061 LLVMContextImpl *pImpl = ShufTy->getContext().pImpl;
2062 return pImpl->ExprConstants.getOrCreate(ShufTy, Key);
2065 Constant *ConstantExpr::getInsertValue(Constant *Agg, Constant *Val,
2066 ArrayRef<unsigned> Idxs,
2067 Type *OnlyIfReducedTy) {
2068 assert(Agg->getType()->isFirstClassType() &&
2069 "Non-first-class type for constant insertvalue expression");
2071 assert(ExtractValueInst::getIndexedType(Agg->getType(),
2072 Idxs) == Val->getType() &&
2073 "insertvalue indices invalid!");
2074 Type *ReqTy = Val->getType();
2076 if (Constant *FC = ConstantFoldInsertValueInstruction(Agg, Val, Idxs))
2079 if (OnlyIfReducedTy == ReqTy)
2082 Constant *ArgVec[] = { Agg, Val };
2083 const ConstantExprKeyType Key(Instruction::InsertValue, ArgVec, 0, 0, Idxs);
2085 LLVMContextImpl *pImpl = Agg->getContext().pImpl;
2086 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2089 Constant *ConstantExpr::getExtractValue(Constant *Agg, ArrayRef<unsigned> Idxs,
2090 Type *OnlyIfReducedTy) {
2091 assert(Agg->getType()->isFirstClassType() &&
2092 "Tried to create extractelement operation on non-first-class type!");
2094 Type *ReqTy = ExtractValueInst::getIndexedType(Agg->getType(), Idxs);
2096 assert(ReqTy && "extractvalue indices invalid!");
2098 assert(Agg->getType()->isFirstClassType() &&
2099 "Non-first-class type for constant extractvalue expression");
2100 if (Constant *FC = ConstantFoldExtractValueInstruction(Agg, Idxs))
2103 if (OnlyIfReducedTy == ReqTy)
2106 Constant *ArgVec[] = { Agg };
2107 const ConstantExprKeyType Key(Instruction::ExtractValue, ArgVec, 0, 0, Idxs);
2109 LLVMContextImpl *pImpl = Agg->getContext().pImpl;
2110 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2113 Constant *ConstantExpr::getNeg(Constant *C, bool HasNUW, bool HasNSW) {
2114 assert(C->getType()->isIntOrIntVectorTy() &&
2115 "Cannot NEG a nonintegral value!");
2116 return getSub(ConstantFP::getZeroValueForNegation(C->getType()),
2120 Constant *ConstantExpr::getFNeg(Constant *C) {
2121 assert(C->getType()->isFPOrFPVectorTy() &&
2122 "Cannot FNEG a non-floating-point value!");
2123 return getFSub(ConstantFP::getZeroValueForNegation(C->getType()), C);
2126 Constant *ConstantExpr::getNot(Constant *C) {
2127 assert(C->getType()->isIntOrIntVectorTy() &&
2128 "Cannot NOT a nonintegral value!");
2129 return get(Instruction::Xor, C, Constant::getAllOnesValue(C->getType()));
2132 Constant *ConstantExpr::getAdd(Constant *C1, Constant *C2,
2133 bool HasNUW, bool HasNSW) {
2134 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2135 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2136 return get(Instruction::Add, C1, C2, Flags);
2139 Constant *ConstantExpr::getFAdd(Constant *C1, Constant *C2) {
2140 return get(Instruction::FAdd, C1, C2);
2143 Constant *ConstantExpr::getSub(Constant *C1, Constant *C2,
2144 bool HasNUW, bool HasNSW) {
2145 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2146 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2147 return get(Instruction::Sub, C1, C2, Flags);
2150 Constant *ConstantExpr::getFSub(Constant *C1, Constant *C2) {
2151 return get(Instruction::FSub, C1, C2);
2154 Constant *ConstantExpr::getMul(Constant *C1, Constant *C2,
2155 bool HasNUW, bool HasNSW) {
2156 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2157 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2158 return get(Instruction::Mul, C1, C2, Flags);
2161 Constant *ConstantExpr::getFMul(Constant *C1, Constant *C2) {
2162 return get(Instruction::FMul, C1, C2);
2165 Constant *ConstantExpr::getUDiv(Constant *C1, Constant *C2, bool isExact) {
2166 return get(Instruction::UDiv, C1, C2,
2167 isExact ? PossiblyExactOperator::IsExact : 0);
2170 Constant *ConstantExpr::getSDiv(Constant *C1, Constant *C2, bool isExact) {
2171 return get(Instruction::SDiv, C1, C2,
2172 isExact ? PossiblyExactOperator::IsExact : 0);
2175 Constant *ConstantExpr::getFDiv(Constant *C1, Constant *C2) {
2176 return get(Instruction::FDiv, C1, C2);
2179 Constant *ConstantExpr::getURem(Constant *C1, Constant *C2) {
2180 return get(Instruction::URem, C1, C2);
2183 Constant *ConstantExpr::getSRem(Constant *C1, Constant *C2) {
2184 return get(Instruction::SRem, C1, C2);
2187 Constant *ConstantExpr::getFRem(Constant *C1, Constant *C2) {
2188 return get(Instruction::FRem, C1, C2);
2191 Constant *ConstantExpr::getAnd(Constant *C1, Constant *C2) {
2192 return get(Instruction::And, C1, C2);
2195 Constant *ConstantExpr::getOr(Constant *C1, Constant *C2) {
2196 return get(Instruction::Or, C1, C2);
2199 Constant *ConstantExpr::getXor(Constant *C1, Constant *C2) {
2200 return get(Instruction::Xor, C1, C2);
2203 Constant *ConstantExpr::getShl(Constant *C1, Constant *C2,
2204 bool HasNUW, bool HasNSW) {
2205 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2206 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2207 return get(Instruction::Shl, C1, C2, Flags);
2210 Constant *ConstantExpr::getLShr(Constant *C1, Constant *C2, bool isExact) {
2211 return get(Instruction::LShr, C1, C2,
2212 isExact ? PossiblyExactOperator::IsExact : 0);
2215 Constant *ConstantExpr::getAShr(Constant *C1, Constant *C2, bool isExact) {
2216 return get(Instruction::AShr, C1, C2,
2217 isExact ? PossiblyExactOperator::IsExact : 0);
2220 Constant *ConstantExpr::getBinOpIdentity(unsigned Opcode, Type *Ty) {
2223 // Doesn't have an identity.
2226 case Instruction::Add:
2227 case Instruction::Or:
2228 case Instruction::Xor:
2229 return Constant::getNullValue(Ty);
2231 case Instruction::Mul:
2232 return ConstantInt::get(Ty, 1);
2234 case Instruction::And:
2235 return Constant::getAllOnesValue(Ty);
2239 Constant *ConstantExpr::getBinOpAbsorber(unsigned Opcode, Type *Ty) {
2242 // Doesn't have an absorber.
2245 case Instruction::Or:
2246 return Constant::getAllOnesValue(Ty);
2248 case Instruction::And:
2249 case Instruction::Mul:
2250 return Constant::getNullValue(Ty);
2254 /// Remove the constant from the constant table.
2255 void ConstantExpr::destroyConstantImpl() {
2256 getType()->getContext().pImpl->ExprConstants.remove(this);
2259 const char *ConstantExpr::getOpcodeName() const {
2260 return Instruction::getOpcodeName(getOpcode());
2263 GetElementPtrConstantExpr::GetElementPtrConstantExpr(
2264 Type *SrcElementTy, Constant *C, ArrayRef<Constant *> IdxList, Type *DestTy)
2265 : ConstantExpr(DestTy, Instruction::GetElementPtr,
2266 OperandTraits<GetElementPtrConstantExpr>::op_end(this) -
2267 (IdxList.size() + 1),
2268 IdxList.size() + 1),
2269 SrcElementTy(SrcElementTy),
2270 ResElementTy(GetElementPtrInst::getIndexedType(SrcElementTy, IdxList)) {
2272 Use *OperandList = getOperandList();
2273 for (unsigned i = 0, E = IdxList.size(); i != E; ++i)
2274 OperandList[i+1] = IdxList[i];
2277 Type *GetElementPtrConstantExpr::getSourceElementType() const {
2278 return SrcElementTy;
2281 Type *GetElementPtrConstantExpr::getResultElementType() const {
2282 return ResElementTy;
2285 //===----------------------------------------------------------------------===//
2286 // ConstantData* implementations
2288 void ConstantDataArray::anchor() {}
2289 void ConstantDataVector::anchor() {}
2291 Type *ConstantDataSequential::getElementType() const {
2292 return getType()->getElementType();
2295 StringRef ConstantDataSequential::getRawDataValues() const {
2296 return StringRef(DataElements, getNumElements()*getElementByteSize());
2299 bool ConstantDataSequential::isElementTypeCompatible(Type *Ty) {
2300 if (Ty->isHalfTy() || Ty->isFloatTy() || Ty->isDoubleTy()) return true;
2301 if (auto *IT = dyn_cast<IntegerType>(Ty)) {
2302 switch (IT->getBitWidth()) {
2314 unsigned ConstantDataSequential::getNumElements() const {
2315 if (ArrayType *AT = dyn_cast<ArrayType>(getType()))
2316 return AT->getNumElements();
2317 return getType()->getVectorNumElements();
2321 uint64_t ConstantDataSequential::getElementByteSize() const {
2322 return getElementType()->getPrimitiveSizeInBits()/8;
2325 /// Return the start of the specified element.
2326 const char *ConstantDataSequential::getElementPointer(unsigned Elt) const {
2327 assert(Elt < getNumElements() && "Invalid Elt");
2328 return DataElements+Elt*getElementByteSize();
2332 /// Return true if the array is empty or all zeros.
2333 static bool isAllZeros(StringRef Arr) {
2340 /// This is the underlying implementation of all of the
2341 /// ConstantDataSequential::get methods. They all thunk down to here, providing
2342 /// the correct element type. We take the bytes in as a StringRef because
2343 /// we *want* an underlying "char*" to avoid TBAA type punning violations.
2344 Constant *ConstantDataSequential::getImpl(StringRef Elements, Type *Ty) {
2345 assert(isElementTypeCompatible(Ty->getSequentialElementType()));
2346 // If the elements are all zero or there are no elements, return a CAZ, which
2347 // is more dense and canonical.
2348 if (isAllZeros(Elements))
2349 return ConstantAggregateZero::get(Ty);
2351 // Do a lookup to see if we have already formed one of these.
2354 .pImpl->CDSConstants.insert(std::make_pair(Elements, nullptr))
2357 // The bucket can point to a linked list of different CDS's that have the same
2358 // body but different types. For example, 0,0,0,1 could be a 4 element array
2359 // of i8, or a 1-element array of i32. They'll both end up in the same
2360 /// StringMap bucket, linked up by their Next pointers. Walk the list.
2361 ConstantDataSequential **Entry = &Slot.second;
2362 for (ConstantDataSequential *Node = *Entry; Node;
2363 Entry = &Node->Next, Node = *Entry)
2364 if (Node->getType() == Ty)
2367 // Okay, we didn't get a hit. Create a node of the right class, link it in,
2369 if (isa<ArrayType>(Ty))
2370 return *Entry = new ConstantDataArray(Ty, Slot.first().data());
2372 assert(isa<VectorType>(Ty));
2373 return *Entry = new ConstantDataVector(Ty, Slot.first().data());
2376 void ConstantDataSequential::destroyConstantImpl() {
2377 // Remove the constant from the StringMap.
2378 StringMap<ConstantDataSequential*> &CDSConstants =
2379 getType()->getContext().pImpl->CDSConstants;
2381 StringMap<ConstantDataSequential*>::iterator Slot =
2382 CDSConstants.find(getRawDataValues());
2384 assert(Slot != CDSConstants.end() && "CDS not found in uniquing table");
2386 ConstantDataSequential **Entry = &Slot->getValue();
2388 // Remove the entry from the hash table.
2389 if (!(*Entry)->Next) {
2390 // If there is only one value in the bucket (common case) it must be this
2391 // entry, and removing the entry should remove the bucket completely.
2392 assert((*Entry) == this && "Hash mismatch in ConstantDataSequential");
2393 getContext().pImpl->CDSConstants.erase(Slot);
2395 // Otherwise, there are multiple entries linked off the bucket, unlink the
2396 // node we care about but keep the bucket around.
2397 for (ConstantDataSequential *Node = *Entry; ;
2398 Entry = &Node->Next, Node = *Entry) {
2399 assert(Node && "Didn't find entry in its uniquing hash table!");
2400 // If we found our entry, unlink it from the list and we're done.
2402 *Entry = Node->Next;
2408 // If we were part of a list, make sure that we don't delete the list that is
2409 // still owned by the uniquing map.
2413 /// get() constructors - Return a constant with array type with an element
2414 /// count and element type matching the ArrayRef passed in. Note that this
2415 /// can return a ConstantAggregateZero object.
2416 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint8_t> Elts) {
2417 Type *Ty = ArrayType::get(Type::getInt8Ty(Context), Elts.size());
2418 const char *Data = reinterpret_cast<const char *>(Elts.data());
2419 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*1), Ty);
2421 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint16_t> Elts){
2422 Type *Ty = ArrayType::get(Type::getInt16Ty(Context), Elts.size());
2423 const char *Data = reinterpret_cast<const char *>(Elts.data());
2424 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*2), Ty);
2426 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint32_t> Elts){
2427 Type *Ty = ArrayType::get(Type::getInt32Ty(Context), Elts.size());
2428 const char *Data = reinterpret_cast<const char *>(Elts.data());
2429 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2431 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint64_t> Elts){
2432 Type *Ty = ArrayType::get(Type::getInt64Ty(Context), Elts.size());
2433 const char *Data = reinterpret_cast<const char *>(Elts.data());
2434 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*8), Ty);
2436 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<float> Elts) {
2437 Type *Ty = ArrayType::get(Type::getFloatTy(Context), Elts.size());
2438 const char *Data = reinterpret_cast<const char *>(Elts.data());
2439 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2441 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<double> Elts) {
2442 Type *Ty = ArrayType::get(Type::getDoubleTy(Context), Elts.size());
2443 const char *Data = reinterpret_cast<const char *>(Elts.data());
2444 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2447 /// getFP() constructors - Return a constant with array type with an element
2448 /// count and element type of float with precision matching the number of
2449 /// bits in the ArrayRef passed in. (i.e. half for 16bits, float for 32bits,
2450 /// double for 64bits) Note that this can return a ConstantAggregateZero
2452 Constant *ConstantDataArray::getFP(LLVMContext &Context,
2453 ArrayRef<uint16_t> Elts) {
2454 Type *Ty = ArrayType::get(Type::getHalfTy(Context), Elts.size());
2455 const char *Data = reinterpret_cast<const char *>(Elts.data());
2456 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 2), Ty);
2458 Constant *ConstantDataArray::getFP(LLVMContext &Context,
2459 ArrayRef<uint32_t> Elts) {
2460 Type *Ty = ArrayType::get(Type::getFloatTy(Context), Elts.size());
2461 const char *Data = reinterpret_cast<const char *>(Elts.data());
2462 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 4), Ty);
2464 Constant *ConstantDataArray::getFP(LLVMContext &Context,
2465 ArrayRef<uint64_t> Elts) {
2466 Type *Ty = ArrayType::get(Type::getDoubleTy(Context), Elts.size());
2467 const char *Data = reinterpret_cast<const char *>(Elts.data());
2468 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2471 Constant *ConstantDataArray::getString(LLVMContext &Context,
2472 StringRef Str, bool AddNull) {
2474 const uint8_t *Data = reinterpret_cast<const uint8_t *>(Str.data());
2475 return get(Context, makeArrayRef(const_cast<uint8_t *>(Data),
2479 SmallVector<uint8_t, 64> ElementVals;
2480 ElementVals.append(Str.begin(), Str.end());
2481 ElementVals.push_back(0);
2482 return get(Context, ElementVals);
2485 /// get() constructors - Return a constant with vector type with an element
2486 /// count and element type matching the ArrayRef passed in. Note that this
2487 /// can return a ConstantAggregateZero object.
2488 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint8_t> Elts){
2489 Type *Ty = VectorType::get(Type::getInt8Ty(Context), Elts.size());
2490 const char *Data = reinterpret_cast<const char *>(Elts.data());
2491 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*1), Ty);
2493 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint16_t> Elts){
2494 Type *Ty = VectorType::get(Type::getInt16Ty(Context), Elts.size());
2495 const char *Data = reinterpret_cast<const char *>(Elts.data());
2496 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*2), Ty);
2498 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint32_t> Elts){
2499 Type *Ty = VectorType::get(Type::getInt32Ty(Context), Elts.size());
2500 const char *Data = reinterpret_cast<const char *>(Elts.data());
2501 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2503 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint64_t> Elts){
2504 Type *Ty = VectorType::get(Type::getInt64Ty(Context), Elts.size());
2505 const char *Data = reinterpret_cast<const char *>(Elts.data());
2506 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*8), Ty);
2508 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<float> Elts) {
2509 Type *Ty = VectorType::get(Type::getFloatTy(Context), Elts.size());
2510 const char *Data = reinterpret_cast<const char *>(Elts.data());
2511 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2513 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<double> Elts) {
2514 Type *Ty = VectorType::get(Type::getDoubleTy(Context), Elts.size());
2515 const char *Data = reinterpret_cast<const char *>(Elts.data());
2516 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2519 /// getFP() constructors - Return a constant with vector type with an element
2520 /// count and element type of float with the precision matching the number of
2521 /// bits in the ArrayRef passed in. (i.e. half for 16bits, float for 32bits,
2522 /// double for 64bits) Note that this can return a ConstantAggregateZero
2524 Constant *ConstantDataVector::getFP(LLVMContext &Context,
2525 ArrayRef<uint16_t> Elts) {
2526 Type *Ty = VectorType::get(Type::getHalfTy(Context), Elts.size());
2527 const char *Data = reinterpret_cast<const char *>(Elts.data());
2528 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 2), Ty);
2530 Constant *ConstantDataVector::getFP(LLVMContext &Context,
2531 ArrayRef<uint32_t> Elts) {
2532 Type *Ty = VectorType::get(Type::getFloatTy(Context), Elts.size());
2533 const char *Data = reinterpret_cast<const char *>(Elts.data());
2534 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 4), Ty);
2536 Constant *ConstantDataVector::getFP(LLVMContext &Context,
2537 ArrayRef<uint64_t> Elts) {
2538 Type *Ty = VectorType::get(Type::getDoubleTy(Context), Elts.size());
2539 const char *Data = reinterpret_cast<const char *>(Elts.data());
2540 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2543 Constant *ConstantDataVector::getSplat(unsigned NumElts, Constant *V) {
2544 assert(isElementTypeCompatible(V->getType()) &&
2545 "Element type not compatible with ConstantData");
2546 if (ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
2547 if (CI->getType()->isIntegerTy(8)) {
2548 SmallVector<uint8_t, 16> Elts(NumElts, CI->getZExtValue());
2549 return get(V->getContext(), Elts);
2551 if (CI->getType()->isIntegerTy(16)) {
2552 SmallVector<uint16_t, 16> Elts(NumElts, CI->getZExtValue());
2553 return get(V->getContext(), Elts);
2555 if (CI->getType()->isIntegerTy(32)) {
2556 SmallVector<uint32_t, 16> Elts(NumElts, CI->getZExtValue());
2557 return get(V->getContext(), Elts);
2559 assert(CI->getType()->isIntegerTy(64) && "Unsupported ConstantData type");
2560 SmallVector<uint64_t, 16> Elts(NumElts, CI->getZExtValue());
2561 return get(V->getContext(), Elts);
2564 if (ConstantFP *CFP = dyn_cast<ConstantFP>(V)) {
2565 if (CFP->getType()->isHalfTy()) {
2566 SmallVector<uint16_t, 16> Elts(
2567 NumElts, CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
2568 return getFP(V->getContext(), Elts);
2570 if (CFP->getType()->isFloatTy()) {
2571 SmallVector<uint32_t, 16> Elts(
2572 NumElts, CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
2573 return getFP(V->getContext(), Elts);
2575 if (CFP->getType()->isDoubleTy()) {
2576 SmallVector<uint64_t, 16> Elts(
2577 NumElts, CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
2578 return getFP(V->getContext(), Elts);
2581 return ConstantVector::getSplat(NumElts, V);
2585 uint64_t ConstantDataSequential::getElementAsInteger(unsigned Elt) const {
2586 assert(isa<IntegerType>(getElementType()) &&
2587 "Accessor can only be used when element is an integer");
2588 const char *EltPtr = getElementPointer(Elt);
2590 // The data is stored in host byte order, make sure to cast back to the right
2591 // type to load with the right endianness.
2592 switch (getElementType()->getIntegerBitWidth()) {
2593 default: llvm_unreachable("Invalid bitwidth for CDS");
2595 return *const_cast<uint8_t *>(reinterpret_cast<const uint8_t *>(EltPtr));
2597 return *const_cast<uint16_t *>(reinterpret_cast<const uint16_t *>(EltPtr));
2599 return *const_cast<uint32_t *>(reinterpret_cast<const uint32_t *>(EltPtr));
2601 return *const_cast<uint64_t *>(reinterpret_cast<const uint64_t *>(EltPtr));
2605 APFloat ConstantDataSequential::getElementAsAPFloat(unsigned Elt) const {
2606 const char *EltPtr = getElementPointer(Elt);
2608 switch (getElementType()->getTypeID()) {
2610 llvm_unreachable("Accessor can only be used when element is float/double!");
2611 case Type::HalfTyID: {
2612 auto EltVal = *reinterpret_cast<const uint16_t *>(EltPtr);
2613 return APFloat(APFloat::IEEEhalf(), APInt(16, EltVal));
2615 case Type::FloatTyID: {
2616 auto EltVal = *reinterpret_cast<const uint32_t *>(EltPtr);
2617 return APFloat(APFloat::IEEEsingle(), APInt(32, EltVal));
2619 case Type::DoubleTyID: {
2620 auto EltVal = *reinterpret_cast<const uint64_t *>(EltPtr);
2621 return APFloat(APFloat::IEEEdouble(), APInt(64, EltVal));
2626 float ConstantDataSequential::getElementAsFloat(unsigned Elt) const {
2627 assert(getElementType()->isFloatTy() &&
2628 "Accessor can only be used when element is a 'float'");
2629 const float *EltPtr = reinterpret_cast<const float *>(getElementPointer(Elt));
2630 return *const_cast<float *>(EltPtr);
2633 double ConstantDataSequential::getElementAsDouble(unsigned Elt) const {
2634 assert(getElementType()->isDoubleTy() &&
2635 "Accessor can only be used when element is a 'float'");
2636 const double *EltPtr =
2637 reinterpret_cast<const double *>(getElementPointer(Elt));
2638 return *const_cast<double *>(EltPtr);
2641 Constant *ConstantDataSequential::getElementAsConstant(unsigned Elt) const {
2642 if (getElementType()->isHalfTy() || getElementType()->isFloatTy() ||
2643 getElementType()->isDoubleTy())
2644 return ConstantFP::get(getContext(), getElementAsAPFloat(Elt));
2646 return ConstantInt::get(getElementType(), getElementAsInteger(Elt));
2649 bool ConstantDataSequential::isString() const {
2650 return isa<ArrayType>(getType()) && getElementType()->isIntegerTy(8);
2653 bool ConstantDataSequential::isCString() const {
2657 StringRef Str = getAsString();
2659 // The last value must be nul.
2660 if (Str.back() != 0) return false;
2662 // Other elements must be non-nul.
2663 return Str.drop_back().find(0) == StringRef::npos;
2666 Constant *ConstantDataVector::getSplatValue() const {
2667 const char *Base = getRawDataValues().data();
2669 // Compare elements 1+ to the 0'th element.
2670 unsigned EltSize = getElementByteSize();
2671 for (unsigned i = 1, e = getNumElements(); i != e; ++i)
2672 if (memcmp(Base, Base+i*EltSize, EltSize))
2675 // If they're all the same, return the 0th one as a representative.
2676 return getElementAsConstant(0);
2679 //===----------------------------------------------------------------------===//
2680 // handleOperandChange implementations
2682 /// Update this constant array to change uses of
2683 /// 'From' to be uses of 'To'. This must update the uniquing data structures
2686 /// Note that we intentionally replace all uses of From with To here. Consider
2687 /// a large array that uses 'From' 1000 times. By handling this case all here,
2688 /// ConstantArray::handleOperandChange is only invoked once, and that
2689 /// single invocation handles all 1000 uses. Handling them one at a time would
2690 /// work, but would be really slow because it would have to unique each updated
2693 void Constant::handleOperandChange(Value *From, Value *To) {
2694 Value *Replacement = nullptr;
2695 switch (getValueID()) {
2697 llvm_unreachable("Not a constant!");
2698 #define HANDLE_CONSTANT(Name) \
2699 case Value::Name##Val: \
2700 Replacement = cast<Name>(this)->handleOperandChangeImpl(From, To); \
2702 #include "llvm/IR/Value.def"
2705 // If handleOperandChangeImpl returned nullptr, then it handled
2706 // replacing itself and we don't want to delete or replace anything else here.
2710 // I do need to replace this with an existing value.
2711 assert(Replacement != this && "I didn't contain From!");
2713 // Everyone using this now uses the replacement.
2714 replaceAllUsesWith(Replacement);
2716 // Delete the old constant!
2720 Value *ConstantArray::handleOperandChangeImpl(Value *From, Value *To) {
2721 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2722 Constant *ToC = cast<Constant>(To);
2724 SmallVector<Constant*, 8> Values;
2725 Values.reserve(getNumOperands()); // Build replacement array.
2727 // Fill values with the modified operands of the constant array. Also,
2728 // compute whether this turns into an all-zeros array.
2729 unsigned NumUpdated = 0;
2731 // Keep track of whether all the values in the array are "ToC".
2732 bool AllSame = true;
2733 Use *OperandList = getOperandList();
2734 unsigned OperandNo = 0;
2735 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2736 Constant *Val = cast<Constant>(O->get());
2738 OperandNo = (O - OperandList);
2742 Values.push_back(Val);
2743 AllSame &= Val == ToC;
2746 if (AllSame && ToC->isNullValue())
2747 return ConstantAggregateZero::get(getType());
2749 if (AllSame && isa<UndefValue>(ToC))
2750 return UndefValue::get(getType());
2752 // Check for any other type of constant-folding.
2753 if (Constant *C = getImpl(getType(), Values))
2756 // Update to the new value.
2757 return getContext().pImpl->ArrayConstants.replaceOperandsInPlace(
2758 Values, this, From, ToC, NumUpdated, OperandNo);
2761 Value *ConstantStruct::handleOperandChangeImpl(Value *From, Value *To) {
2762 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2763 Constant *ToC = cast<Constant>(To);
2765 Use *OperandList = getOperandList();
2767 SmallVector<Constant*, 8> Values;
2768 Values.reserve(getNumOperands()); // Build replacement struct.
2770 // Fill values with the modified operands of the constant struct. Also,
2771 // compute whether this turns into an all-zeros struct.
2772 unsigned NumUpdated = 0;
2773 bool AllSame = true;
2774 unsigned OperandNo = 0;
2775 for (Use *O = OperandList, *E = OperandList + getNumOperands(); O != E; ++O) {
2776 Constant *Val = cast<Constant>(O->get());
2778 OperandNo = (O - OperandList);
2782 Values.push_back(Val);
2783 AllSame &= Val == ToC;
2786 if (AllSame && ToC->isNullValue())
2787 return ConstantAggregateZero::get(getType());
2789 if (AllSame && isa<UndefValue>(ToC))
2790 return UndefValue::get(getType());
2792 // Update to the new value.
2793 return getContext().pImpl->StructConstants.replaceOperandsInPlace(
2794 Values, this, From, ToC, NumUpdated, OperandNo);
2797 Value *ConstantVector::handleOperandChangeImpl(Value *From, Value *To) {
2798 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2799 Constant *ToC = cast<Constant>(To);
2801 SmallVector<Constant*, 8> Values;
2802 Values.reserve(getNumOperands()); // Build replacement array...
2803 unsigned NumUpdated = 0;
2804 unsigned OperandNo = 0;
2805 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
2806 Constant *Val = getOperand(i);
2812 Values.push_back(Val);
2815 if (Constant *C = getImpl(Values))
2818 // Update to the new value.
2819 return getContext().pImpl->VectorConstants.replaceOperandsInPlace(
2820 Values, this, From, ToC, NumUpdated, OperandNo);
2823 Value *ConstantExpr::handleOperandChangeImpl(Value *From, Value *ToV) {
2824 assert(isa<Constant>(ToV) && "Cannot make Constant refer to non-constant!");
2825 Constant *To = cast<Constant>(ToV);
2827 SmallVector<Constant*, 8> NewOps;
2828 unsigned NumUpdated = 0;
2829 unsigned OperandNo = 0;
2830 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
2831 Constant *Op = getOperand(i);
2837 NewOps.push_back(Op);
2839 assert(NumUpdated && "I didn't contain From!");
2841 if (Constant *C = getWithOperands(NewOps, getType(), true))
2844 // Update to the new value.
2845 return getContext().pImpl->ExprConstants.replaceOperandsInPlace(
2846 NewOps, this, From, To, NumUpdated, OperandNo);
2849 Instruction *ConstantExpr::getAsInstruction() {
2850 SmallVector<Value *, 4> ValueOperands(op_begin(), op_end());
2851 ArrayRef<Value*> Ops(ValueOperands);
2853 switch (getOpcode()) {
2854 case Instruction::Trunc:
2855 case Instruction::ZExt:
2856 case Instruction::SExt:
2857 case Instruction::FPTrunc:
2858 case Instruction::FPExt:
2859 case Instruction::UIToFP:
2860 case Instruction::SIToFP:
2861 case Instruction::FPToUI:
2862 case Instruction::FPToSI:
2863 case Instruction::PtrToInt:
2864 case Instruction::IntToPtr:
2865 case Instruction::BitCast:
2866 case Instruction::AddrSpaceCast:
2867 return CastInst::Create((Instruction::CastOps)getOpcode(),
2869 case Instruction::Select:
2870 return SelectInst::Create(Ops[0], Ops[1], Ops[2]);
2871 case Instruction::InsertElement:
2872 return InsertElementInst::Create(Ops[0], Ops[1], Ops[2]);
2873 case Instruction::ExtractElement:
2874 return ExtractElementInst::Create(Ops[0], Ops[1]);
2875 case Instruction::InsertValue:
2876 return InsertValueInst::Create(Ops[0], Ops[1], getIndices());
2877 case Instruction::ExtractValue:
2878 return ExtractValueInst::Create(Ops[0], getIndices());
2879 case Instruction::ShuffleVector:
2880 return new ShuffleVectorInst(Ops[0], Ops[1], Ops[2]);
2882 case Instruction::GetElementPtr: {
2883 const auto *GO = cast<GEPOperator>(this);
2884 if (GO->isInBounds())
2885 return GetElementPtrInst::CreateInBounds(GO->getSourceElementType(),
2886 Ops[0], Ops.slice(1));
2887 return GetElementPtrInst::Create(GO->getSourceElementType(), Ops[0],
2890 case Instruction::ICmp:
2891 case Instruction::FCmp:
2892 return CmpInst::Create((Instruction::OtherOps)getOpcode(),
2893 (CmpInst::Predicate)getPredicate(), Ops[0], Ops[1]);
2896 assert(getNumOperands() == 2 && "Must be binary operator?");
2897 BinaryOperator *BO =
2898 BinaryOperator::Create((Instruction::BinaryOps)getOpcode(),
2900 if (isa<OverflowingBinaryOperator>(BO)) {
2901 BO->setHasNoUnsignedWrap(SubclassOptionalData &
2902 OverflowingBinaryOperator::NoUnsignedWrap);
2903 BO->setHasNoSignedWrap(SubclassOptionalData &
2904 OverflowingBinaryOperator::NoSignedWrap);
2906 if (isa<PossiblyExactOperator>(BO))
2907 BO->setIsExact(SubclassOptionalData & PossiblyExactOperator::IsExact);