1 //===-- Constants.cpp - Implement Constant nodes --------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the Constant* classes.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/IR/Constants.h"
15 #include "ConstantFold.h"
16 #include "LLVMContextImpl.h"
17 #include "llvm/ADT/DenseMap.h"
18 #include "llvm/ADT/FoldingSet.h"
19 #include "llvm/ADT/STLExtras.h"
20 #include "llvm/ADT/SmallVector.h"
21 #include "llvm/ADT/StringExtras.h"
22 #include "llvm/ADT/StringMap.h"
23 #include "llvm/IR/DerivedTypes.h"
24 #include "llvm/IR/GetElementPtrTypeIterator.h"
25 #include "llvm/IR/GlobalValue.h"
26 #include "llvm/IR/Instructions.h"
27 #include "llvm/IR/Module.h"
28 #include "llvm/IR/Operator.h"
29 #include "llvm/Support/Compiler.h"
30 #include "llvm/Support/Debug.h"
31 #include "llvm/Support/ErrorHandling.h"
32 #include "llvm/Support/ManagedStatic.h"
33 #include "llvm/Support/MathExtras.h"
34 #include "llvm/Support/raw_ostream.h"
39 //===----------------------------------------------------------------------===//
41 //===----------------------------------------------------------------------===//
43 void Constant::anchor() { }
45 bool Constant::isNegativeZeroValue() const {
46 // Floating point values have an explicit -0.0 value.
47 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
48 return CFP->isZero() && CFP->isNegative();
50 // Equivalent for a vector of -0.0's.
51 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
52 if (ConstantFP *SplatCFP = dyn_cast_or_null<ConstantFP>(CV->getSplatValue()))
53 if (SplatCFP && SplatCFP->isZero() && SplatCFP->isNegative())
56 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
57 if (ConstantFP *SplatCFP = dyn_cast_or_null<ConstantFP>(CV->getSplatValue()))
58 if (SplatCFP && SplatCFP->isZero() && SplatCFP->isNegative())
61 // We've already handled true FP case; any other FP vectors can't represent -0.0.
62 if (getType()->isFPOrFPVectorTy())
65 // Otherwise, just use +0.0.
69 // Return true iff this constant is positive zero (floating point), negative
70 // zero (floating point), or a null value.
71 bool Constant::isZeroValue() const {
72 // Floating point values have an explicit -0.0 value.
73 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
76 // Equivalent for a vector of -0.0's.
77 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
78 if (ConstantFP *SplatCFP = dyn_cast_or_null<ConstantFP>(CV->getSplatValue()))
79 if (SplatCFP && SplatCFP->isZero())
82 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
83 if (ConstantFP *SplatCFP = dyn_cast_or_null<ConstantFP>(CV->getSplatValue()))
84 if (SplatCFP && SplatCFP->isZero())
87 // Otherwise, just use +0.0.
91 bool Constant::isNullValue() const {
93 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
97 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
98 return CFP->isZero() && !CFP->isNegative();
100 // constant zero is zero for aggregates, cpnull is null for pointers, none for
102 return isa<ConstantAggregateZero>(this) || isa<ConstantPointerNull>(this) ||
103 isa<ConstantTokenNone>(this);
106 bool Constant::isAllOnesValue() const {
107 // Check for -1 integers
108 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
109 return CI->isMinusOne();
111 // Check for FP which are bitcasted from -1 integers
112 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
113 return CFP->getValueAPF().bitcastToAPInt().isAllOnesValue();
115 // Check for constant vectors which are splats of -1 values.
116 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
117 if (Constant *Splat = CV->getSplatValue())
118 return Splat->isAllOnesValue();
120 // Check for constant vectors which are splats of -1 values.
121 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
122 if (Constant *Splat = CV->getSplatValue())
123 return Splat->isAllOnesValue();
128 bool Constant::isOneValue() const {
129 // Check for 1 integers
130 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
133 // Check for FP which are bitcasted from 1 integers
134 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
135 return CFP->getValueAPF().bitcastToAPInt() == 1;
137 // Check for constant vectors which are splats of 1 values.
138 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
139 if (Constant *Splat = CV->getSplatValue())
140 return Splat->isOneValue();
142 // Check for constant vectors which are splats of 1 values.
143 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
144 if (Constant *Splat = CV->getSplatValue())
145 return Splat->isOneValue();
150 bool Constant::isMinSignedValue() const {
151 // Check for INT_MIN integers
152 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
153 return CI->isMinValue(/*isSigned=*/true);
155 // Check for FP which are bitcasted from INT_MIN integers
156 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
157 return CFP->getValueAPF().bitcastToAPInt().isMinSignedValue();
159 // Check for constant vectors which are splats of INT_MIN values.
160 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
161 if (Constant *Splat = CV->getSplatValue())
162 return Splat->isMinSignedValue();
164 // Check for constant vectors which are splats of INT_MIN values.
165 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
166 if (Constant *Splat = CV->getSplatValue())
167 return Splat->isMinSignedValue();
172 bool Constant::isNotMinSignedValue() const {
173 // Check for INT_MIN integers
174 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
175 return !CI->isMinValue(/*isSigned=*/true);
177 // Check for FP which are bitcasted from INT_MIN integers
178 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
179 return !CFP->getValueAPF().bitcastToAPInt().isMinSignedValue();
181 // Check for constant vectors which are splats of INT_MIN values.
182 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
183 if (Constant *Splat = CV->getSplatValue())
184 return Splat->isNotMinSignedValue();
186 // Check for constant vectors which are splats of INT_MIN values.
187 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
188 if (Constant *Splat = CV->getSplatValue())
189 return Splat->isNotMinSignedValue();
191 // It *may* contain INT_MIN, we can't tell.
195 // Constructor to create a '0' constant of arbitrary type...
196 Constant *Constant::getNullValue(Type *Ty) {
197 switch (Ty->getTypeID()) {
198 case Type::IntegerTyID:
199 return ConstantInt::get(Ty, 0);
201 return ConstantFP::get(Ty->getContext(),
202 APFloat::getZero(APFloat::IEEEhalf));
203 case Type::FloatTyID:
204 return ConstantFP::get(Ty->getContext(),
205 APFloat::getZero(APFloat::IEEEsingle));
206 case Type::DoubleTyID:
207 return ConstantFP::get(Ty->getContext(),
208 APFloat::getZero(APFloat::IEEEdouble));
209 case Type::X86_FP80TyID:
210 return ConstantFP::get(Ty->getContext(),
211 APFloat::getZero(APFloat::x87DoubleExtended));
212 case Type::FP128TyID:
213 return ConstantFP::get(Ty->getContext(),
214 APFloat::getZero(APFloat::IEEEquad));
215 case Type::PPC_FP128TyID:
216 return ConstantFP::get(Ty->getContext(),
217 APFloat(APFloat::PPCDoubleDouble,
218 APInt::getNullValue(128)));
219 case Type::PointerTyID:
220 return ConstantPointerNull::get(cast<PointerType>(Ty));
221 case Type::StructTyID:
222 case Type::ArrayTyID:
223 case Type::VectorTyID:
224 return ConstantAggregateZero::get(Ty);
225 case Type::TokenTyID:
226 return ConstantTokenNone::get(Ty->getContext());
228 // Function, Label, or Opaque type?
229 llvm_unreachable("Cannot create a null constant of that type!");
233 Constant *Constant::getIntegerValue(Type *Ty, const APInt &V) {
234 Type *ScalarTy = Ty->getScalarType();
236 // Create the base integer constant.
237 Constant *C = ConstantInt::get(Ty->getContext(), V);
239 // Convert an integer to a pointer, if necessary.
240 if (PointerType *PTy = dyn_cast<PointerType>(ScalarTy))
241 C = ConstantExpr::getIntToPtr(C, PTy);
243 // Broadcast a scalar to a vector, if necessary.
244 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
245 C = ConstantVector::getSplat(VTy->getNumElements(), C);
250 Constant *Constant::getAllOnesValue(Type *Ty) {
251 if (IntegerType *ITy = dyn_cast<IntegerType>(Ty))
252 return ConstantInt::get(Ty->getContext(),
253 APInt::getAllOnesValue(ITy->getBitWidth()));
255 if (Ty->isFloatingPointTy()) {
256 APFloat FL = APFloat::getAllOnesValue(Ty->getPrimitiveSizeInBits(),
257 !Ty->isPPC_FP128Ty());
258 return ConstantFP::get(Ty->getContext(), FL);
261 VectorType *VTy = cast<VectorType>(Ty);
262 return ConstantVector::getSplat(VTy->getNumElements(),
263 getAllOnesValue(VTy->getElementType()));
266 /// getAggregateElement - For aggregates (struct/array/vector) return the
267 /// constant that corresponds to the specified element if possible, or null if
268 /// not. This can return null if the element index is a ConstantExpr, or if
269 /// 'this' is a constant expr.
270 Constant *Constant::getAggregateElement(unsigned Elt) const {
271 if (const ConstantStruct *CS = dyn_cast<ConstantStruct>(this))
272 return Elt < CS->getNumOperands() ? CS->getOperand(Elt) : nullptr;
274 if (const ConstantArray *CA = dyn_cast<ConstantArray>(this))
275 return Elt < CA->getNumOperands() ? CA->getOperand(Elt) : nullptr;
277 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
278 return Elt < CV->getNumOperands() ? CV->getOperand(Elt) : nullptr;
280 if (const ConstantAggregateZero *CAZ = dyn_cast<ConstantAggregateZero>(this))
281 return Elt < CAZ->getNumElements() ? CAZ->getElementValue(Elt) : nullptr;
283 if (const UndefValue *UV = dyn_cast<UndefValue>(this))
284 return Elt < UV->getNumElements() ? UV->getElementValue(Elt) : nullptr;
286 if (const ConstantDataSequential *CDS =dyn_cast<ConstantDataSequential>(this))
287 return Elt < CDS->getNumElements() ? CDS->getElementAsConstant(Elt)
292 Constant *Constant::getAggregateElement(Constant *Elt) const {
293 assert(isa<IntegerType>(Elt->getType()) && "Index must be an integer");
294 if (ConstantInt *CI = dyn_cast<ConstantInt>(Elt))
295 return getAggregateElement(CI->getZExtValue());
299 void Constant::destroyConstant() {
300 /// First call destroyConstantImpl on the subclass. This gives the subclass
301 /// a chance to remove the constant from any maps/pools it's contained in.
302 switch (getValueID()) {
304 llvm_unreachable("Not a constant!");
305 #define HANDLE_CONSTANT(Name) \
306 case Value::Name##Val: \
307 cast<Name>(this)->destroyConstantImpl(); \
309 #include "llvm/IR/Value.def"
312 // When a Constant is destroyed, there may be lingering
313 // references to the constant by other constants in the constant pool. These
314 // constants are implicitly dependent on the module that is being deleted,
315 // but they don't know that. Because we only find out when the CPV is
316 // deleted, we must now notify all of our users (that should only be
317 // Constants) that they are, in fact, invalid now and should be deleted.
319 while (!use_empty()) {
320 Value *V = user_back();
321 #ifndef NDEBUG // Only in -g mode...
322 if (!isa<Constant>(V)) {
323 dbgs() << "While deleting: " << *this
324 << "\n\nUse still stuck around after Def is destroyed: " << *V
328 assert(isa<Constant>(V) && "References remain to Constant being destroyed");
329 cast<Constant>(V)->destroyConstant();
331 // The constant should remove itself from our use list...
332 assert((use_empty() || user_back() != V) && "Constant not removed!");
335 // Value has no outstanding references it is safe to delete it now...
339 static bool canTrapImpl(const Constant *C,
340 SmallPtrSetImpl<const ConstantExpr *> &NonTrappingOps) {
341 assert(C->getType()->isFirstClassType() && "Cannot evaluate aggregate vals!");
342 // The only thing that could possibly trap are constant exprs.
343 const ConstantExpr *CE = dyn_cast<ConstantExpr>(C);
347 // ConstantExpr traps if any operands can trap.
348 for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i) {
349 if (ConstantExpr *Op = dyn_cast<ConstantExpr>(CE->getOperand(i))) {
350 if (NonTrappingOps.insert(Op).second && canTrapImpl(Op, NonTrappingOps))
355 // Otherwise, only specific operations can trap.
356 switch (CE->getOpcode()) {
359 case Instruction::UDiv:
360 case Instruction::SDiv:
361 case Instruction::FDiv:
362 case Instruction::URem:
363 case Instruction::SRem:
364 case Instruction::FRem:
365 // Div and rem can trap if the RHS is not known to be non-zero.
366 if (!isa<ConstantInt>(CE->getOperand(1)) ||CE->getOperand(1)->isNullValue())
372 /// canTrap - Return true if evaluation of this constant could trap. This is
373 /// true for things like constant expressions that could divide by zero.
374 bool Constant::canTrap() const {
375 SmallPtrSet<const ConstantExpr *, 4> NonTrappingOps;
376 return canTrapImpl(this, NonTrappingOps);
379 /// Check if C contains a GlobalValue for which Predicate is true.
381 ConstHasGlobalValuePredicate(const Constant *C,
382 bool (*Predicate)(const GlobalValue *)) {
383 SmallPtrSet<const Constant *, 8> Visited;
384 SmallVector<const Constant *, 8> WorkList;
385 WorkList.push_back(C);
388 while (!WorkList.empty()) {
389 const Constant *WorkItem = WorkList.pop_back_val();
390 if (const auto *GV = dyn_cast<GlobalValue>(WorkItem))
393 for (const Value *Op : WorkItem->operands()) {
394 const Constant *ConstOp = dyn_cast<Constant>(Op);
397 if (Visited.insert(ConstOp).second)
398 WorkList.push_back(ConstOp);
404 /// Return true if the value can vary between threads.
405 bool Constant::isThreadDependent() const {
406 auto DLLImportPredicate = [](const GlobalValue *GV) {
407 return GV->isThreadLocal();
409 return ConstHasGlobalValuePredicate(this, DLLImportPredicate);
412 bool Constant::isDLLImportDependent() const {
413 auto DLLImportPredicate = [](const GlobalValue *GV) {
414 return GV->hasDLLImportStorageClass();
416 return ConstHasGlobalValuePredicate(this, DLLImportPredicate);
419 /// Return true if the constant has users other than constant exprs and other
421 bool Constant::isConstantUsed() const {
422 for (const User *U : users()) {
423 const Constant *UC = dyn_cast<Constant>(U);
424 if (!UC || isa<GlobalValue>(UC))
427 if (UC->isConstantUsed())
433 bool Constant::needsRelocation() const {
434 if (isa<GlobalValue>(this))
435 return true; // Global reference.
437 if (const BlockAddress *BA = dyn_cast<BlockAddress>(this))
438 return BA->getFunction()->needsRelocation();
440 // While raw uses of blockaddress need to be relocated, differences between
441 // two of them don't when they are for labels in the same function. This is a
442 // common idiom when creating a table for the indirect goto extension, so we
443 // handle it efficiently here.
444 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(this))
445 if (CE->getOpcode() == Instruction::Sub) {
446 ConstantExpr *LHS = dyn_cast<ConstantExpr>(CE->getOperand(0));
447 ConstantExpr *RHS = dyn_cast<ConstantExpr>(CE->getOperand(1));
448 if (LHS && RHS && LHS->getOpcode() == Instruction::PtrToInt &&
449 RHS->getOpcode() == Instruction::PtrToInt &&
450 isa<BlockAddress>(LHS->getOperand(0)) &&
451 isa<BlockAddress>(RHS->getOperand(0)) &&
452 cast<BlockAddress>(LHS->getOperand(0))->getFunction() ==
453 cast<BlockAddress>(RHS->getOperand(0))->getFunction())
458 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
459 Result |= cast<Constant>(getOperand(i))->needsRelocation();
464 /// removeDeadUsersOfConstant - If the specified constantexpr is dead, remove
465 /// it. This involves recursively eliminating any dead users of the
467 static bool removeDeadUsersOfConstant(const Constant *C) {
468 if (isa<GlobalValue>(C)) return false; // Cannot remove this
470 while (!C->use_empty()) {
471 const Constant *User = dyn_cast<Constant>(C->user_back());
472 if (!User) return false; // Non-constant usage;
473 if (!removeDeadUsersOfConstant(User))
474 return false; // Constant wasn't dead
477 const_cast<Constant*>(C)->destroyConstant();
482 /// removeDeadConstantUsers - If there are any dead constant users dangling
483 /// off of this constant, remove them. This method is useful for clients
484 /// that want to check to see if a global is unused, but don't want to deal
485 /// with potentially dead constants hanging off of the globals.
486 void Constant::removeDeadConstantUsers() const {
487 Value::const_user_iterator I = user_begin(), E = user_end();
488 Value::const_user_iterator LastNonDeadUser = E;
490 const Constant *User = dyn_cast<Constant>(*I);
497 if (!removeDeadUsersOfConstant(User)) {
498 // If the constant wasn't dead, remember that this was the last live use
499 // and move on to the next constant.
505 // If the constant was dead, then the iterator is invalidated.
506 if (LastNonDeadUser == E) {
518 //===----------------------------------------------------------------------===//
520 //===----------------------------------------------------------------------===//
522 void ConstantInt::anchor() { }
524 ConstantInt::ConstantInt(IntegerType *Ty, const APInt& V)
525 : Constant(Ty, ConstantIntVal, nullptr, 0), Val(V) {
526 assert(V.getBitWidth() == Ty->getBitWidth() && "Invalid constant for type");
529 ConstantInt *ConstantInt::getTrue(LLVMContext &Context) {
530 LLVMContextImpl *pImpl = Context.pImpl;
531 if (!pImpl->TheTrueVal)
532 pImpl->TheTrueVal = ConstantInt::get(Type::getInt1Ty(Context), 1);
533 return pImpl->TheTrueVal;
536 ConstantInt *ConstantInt::getFalse(LLVMContext &Context) {
537 LLVMContextImpl *pImpl = Context.pImpl;
538 if (!pImpl->TheFalseVal)
539 pImpl->TheFalseVal = ConstantInt::get(Type::getInt1Ty(Context), 0);
540 return pImpl->TheFalseVal;
543 Constant *ConstantInt::getTrue(Type *Ty) {
544 VectorType *VTy = dyn_cast<VectorType>(Ty);
546 assert(Ty->isIntegerTy(1) && "True must be i1 or vector of i1.");
547 return ConstantInt::getTrue(Ty->getContext());
549 assert(VTy->getElementType()->isIntegerTy(1) &&
550 "True must be vector of i1 or i1.");
551 return ConstantVector::getSplat(VTy->getNumElements(),
552 ConstantInt::getTrue(Ty->getContext()));
555 Constant *ConstantInt::getFalse(Type *Ty) {
556 VectorType *VTy = dyn_cast<VectorType>(Ty);
558 assert(Ty->isIntegerTy(1) && "False must be i1 or vector of i1.");
559 return ConstantInt::getFalse(Ty->getContext());
561 assert(VTy->getElementType()->isIntegerTy(1) &&
562 "False must be vector of i1 or i1.");
563 return ConstantVector::getSplat(VTy->getNumElements(),
564 ConstantInt::getFalse(Ty->getContext()));
567 // Get a ConstantInt from an APInt.
568 ConstantInt *ConstantInt::get(LLVMContext &Context, const APInt &V) {
569 // get an existing value or the insertion position
570 LLVMContextImpl *pImpl = Context.pImpl;
571 ConstantInt *&Slot = pImpl->IntConstants[V];
573 // Get the corresponding integer type for the bit width of the value.
574 IntegerType *ITy = IntegerType::get(Context, V.getBitWidth());
575 Slot = new ConstantInt(ITy, V);
577 assert(Slot->getType() == IntegerType::get(Context, V.getBitWidth()));
581 Constant *ConstantInt::get(Type *Ty, uint64_t V, bool isSigned) {
582 Constant *C = get(cast<IntegerType>(Ty->getScalarType()), V, isSigned);
584 // For vectors, broadcast the value.
585 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
586 return ConstantVector::getSplat(VTy->getNumElements(), C);
591 ConstantInt *ConstantInt::get(IntegerType *Ty, uint64_t V,
593 return get(Ty->getContext(), APInt(Ty->getBitWidth(), V, isSigned));
596 ConstantInt *ConstantInt::getSigned(IntegerType *Ty, int64_t V) {
597 return get(Ty, V, true);
600 Constant *ConstantInt::getSigned(Type *Ty, int64_t V) {
601 return get(Ty, V, true);
604 Constant *ConstantInt::get(Type *Ty, const APInt& V) {
605 ConstantInt *C = get(Ty->getContext(), V);
606 assert(C->getType() == Ty->getScalarType() &&
607 "ConstantInt type doesn't match the type implied by its value!");
609 // For vectors, broadcast the value.
610 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
611 return ConstantVector::getSplat(VTy->getNumElements(), C);
616 ConstantInt *ConstantInt::get(IntegerType* Ty, StringRef Str,
618 return get(Ty->getContext(), APInt(Ty->getBitWidth(), Str, radix));
621 /// Remove the constant from the constant table.
622 void ConstantInt::destroyConstantImpl() {
623 llvm_unreachable("You can't ConstantInt->destroyConstantImpl()!");
626 //===----------------------------------------------------------------------===//
628 //===----------------------------------------------------------------------===//
630 static const fltSemantics *TypeToFloatSemantics(Type *Ty) {
632 return &APFloat::IEEEhalf;
634 return &APFloat::IEEEsingle;
635 if (Ty->isDoubleTy())
636 return &APFloat::IEEEdouble;
637 if (Ty->isX86_FP80Ty())
638 return &APFloat::x87DoubleExtended;
639 else if (Ty->isFP128Ty())
640 return &APFloat::IEEEquad;
642 assert(Ty->isPPC_FP128Ty() && "Unknown FP format");
643 return &APFloat::PPCDoubleDouble;
646 void ConstantFP::anchor() { }
648 /// get() - This returns a constant fp for the specified value in the
649 /// specified type. This should only be used for simple constant values like
650 /// 2.0/1.0 etc, that are known-valid both as double and as the target format.
651 Constant *ConstantFP::get(Type *Ty, double V) {
652 LLVMContext &Context = Ty->getContext();
656 FV.convert(*TypeToFloatSemantics(Ty->getScalarType()),
657 APFloat::rmNearestTiesToEven, &ignored);
658 Constant *C = get(Context, FV);
660 // For vectors, broadcast the value.
661 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
662 return ConstantVector::getSplat(VTy->getNumElements(), C);
668 Constant *ConstantFP::get(Type *Ty, StringRef Str) {
669 LLVMContext &Context = Ty->getContext();
671 APFloat FV(*TypeToFloatSemantics(Ty->getScalarType()), Str);
672 Constant *C = get(Context, FV);
674 // For vectors, broadcast the value.
675 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
676 return ConstantVector::getSplat(VTy->getNumElements(), C);
681 Constant *ConstantFP::getNaN(Type *Ty, bool Negative, unsigned Type) {
682 const fltSemantics &Semantics = *TypeToFloatSemantics(Ty->getScalarType());
683 APFloat NaN = APFloat::getNaN(Semantics, Negative, Type);
684 Constant *C = get(Ty->getContext(), NaN);
686 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
687 return ConstantVector::getSplat(VTy->getNumElements(), C);
692 Constant *ConstantFP::getNegativeZero(Type *Ty) {
693 const fltSemantics &Semantics = *TypeToFloatSemantics(Ty->getScalarType());
694 APFloat NegZero = APFloat::getZero(Semantics, /*Negative=*/true);
695 Constant *C = get(Ty->getContext(), NegZero);
697 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
698 return ConstantVector::getSplat(VTy->getNumElements(), C);
704 Constant *ConstantFP::getZeroValueForNegation(Type *Ty) {
705 if (Ty->isFPOrFPVectorTy())
706 return getNegativeZero(Ty);
708 return Constant::getNullValue(Ty);
712 // ConstantFP accessors.
713 ConstantFP* ConstantFP::get(LLVMContext &Context, const APFloat& V) {
714 LLVMContextImpl* pImpl = Context.pImpl;
716 ConstantFP *&Slot = pImpl->FPConstants[V];
720 if (&V.getSemantics() == &APFloat::IEEEhalf)
721 Ty = Type::getHalfTy(Context);
722 else if (&V.getSemantics() == &APFloat::IEEEsingle)
723 Ty = Type::getFloatTy(Context);
724 else if (&V.getSemantics() == &APFloat::IEEEdouble)
725 Ty = Type::getDoubleTy(Context);
726 else if (&V.getSemantics() == &APFloat::x87DoubleExtended)
727 Ty = Type::getX86_FP80Ty(Context);
728 else if (&V.getSemantics() == &APFloat::IEEEquad)
729 Ty = Type::getFP128Ty(Context);
731 assert(&V.getSemantics() == &APFloat::PPCDoubleDouble &&
732 "Unknown FP format");
733 Ty = Type::getPPC_FP128Ty(Context);
735 Slot = new ConstantFP(Ty, V);
741 Constant *ConstantFP::getInfinity(Type *Ty, bool Negative) {
742 const fltSemantics &Semantics = *TypeToFloatSemantics(Ty->getScalarType());
743 Constant *C = get(Ty->getContext(), APFloat::getInf(Semantics, Negative));
745 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
746 return ConstantVector::getSplat(VTy->getNumElements(), C);
751 ConstantFP::ConstantFP(Type *Ty, const APFloat& V)
752 : Constant(Ty, ConstantFPVal, nullptr, 0), Val(V) {
753 assert(&V.getSemantics() == TypeToFloatSemantics(Ty) &&
757 bool ConstantFP::isExactlyValue(const APFloat &V) const {
758 return Val.bitwiseIsEqual(V);
761 /// Remove the constant from the constant table.
762 void ConstantFP::destroyConstantImpl() {
763 llvm_unreachable("You can't ConstantInt->destroyConstantImpl()!");
766 //===----------------------------------------------------------------------===//
767 // ConstantAggregateZero Implementation
768 //===----------------------------------------------------------------------===//
770 /// getSequentialElement - If this CAZ has array or vector type, return a zero
771 /// with the right element type.
772 Constant *ConstantAggregateZero::getSequentialElement() const {
773 return Constant::getNullValue(getType()->getSequentialElementType());
776 /// getStructElement - If this CAZ has struct type, return a zero with the
777 /// right element type for the specified element.
778 Constant *ConstantAggregateZero::getStructElement(unsigned Elt) const {
779 return Constant::getNullValue(getType()->getStructElementType(Elt));
782 /// getElementValue - Return a zero of the right value for the specified GEP
783 /// index if we can, otherwise return null (e.g. if C is a ConstantExpr).
784 Constant *ConstantAggregateZero::getElementValue(Constant *C) const {
785 if (isa<SequentialType>(getType()))
786 return getSequentialElement();
787 return getStructElement(cast<ConstantInt>(C)->getZExtValue());
790 /// getElementValue - Return a zero of the right value for the specified GEP
792 Constant *ConstantAggregateZero::getElementValue(unsigned Idx) const {
793 if (isa<SequentialType>(getType()))
794 return getSequentialElement();
795 return getStructElement(Idx);
798 unsigned ConstantAggregateZero::getNumElements() const {
799 Type *Ty = getType();
800 if (auto *AT = dyn_cast<ArrayType>(Ty))
801 return AT->getNumElements();
802 if (auto *VT = dyn_cast<VectorType>(Ty))
803 return VT->getNumElements();
804 return Ty->getStructNumElements();
807 //===----------------------------------------------------------------------===//
808 // UndefValue Implementation
809 //===----------------------------------------------------------------------===//
811 /// getSequentialElement - If this undef has array or vector type, return an
812 /// undef with the right element type.
813 UndefValue *UndefValue::getSequentialElement() const {
814 return UndefValue::get(getType()->getSequentialElementType());
817 /// getStructElement - If this undef has struct type, return a zero with the
818 /// right element type for the specified element.
819 UndefValue *UndefValue::getStructElement(unsigned Elt) const {
820 return UndefValue::get(getType()->getStructElementType(Elt));
823 /// getElementValue - Return an undef of the right value for the specified GEP
824 /// index if we can, otherwise return null (e.g. if C is a ConstantExpr).
825 UndefValue *UndefValue::getElementValue(Constant *C) const {
826 if (isa<SequentialType>(getType()))
827 return getSequentialElement();
828 return getStructElement(cast<ConstantInt>(C)->getZExtValue());
831 /// getElementValue - Return an undef of the right value for the specified GEP
833 UndefValue *UndefValue::getElementValue(unsigned Idx) const {
834 if (isa<SequentialType>(getType()))
835 return getSequentialElement();
836 return getStructElement(Idx);
839 unsigned UndefValue::getNumElements() const {
840 Type *Ty = getType();
841 if (auto *AT = dyn_cast<ArrayType>(Ty))
842 return AT->getNumElements();
843 if (auto *VT = dyn_cast<VectorType>(Ty))
844 return VT->getNumElements();
845 return Ty->getStructNumElements();
848 //===----------------------------------------------------------------------===//
849 // ConstantXXX Classes
850 //===----------------------------------------------------------------------===//
852 template <typename ItTy, typename EltTy>
853 static bool rangeOnlyContains(ItTy Start, ItTy End, EltTy Elt) {
854 for (; Start != End; ++Start)
860 template <typename SequentialTy, typename ElementTy>
861 static Constant *getIntSequenceIfElementsMatch(ArrayRef<Constant *> V) {
862 assert(!V.empty() && "Cannot get empty int sequence.");
864 SmallVector<ElementTy, 16> Elts;
865 for (Constant *C : V)
866 if (auto *CI = dyn_cast<ConstantInt>(C))
867 Elts.push_back(CI->getZExtValue());
870 return SequentialTy::get(V[0]->getContext(), Elts);
873 template <typename SequentialTy, typename ElementTy>
874 static Constant *getFPSequenceIfElementsMatch(ArrayRef<Constant *> V) {
875 assert(!V.empty() && "Cannot get empty FP sequence.");
877 SmallVector<ElementTy, 16> Elts;
878 for (Constant *C : V)
879 if (auto *CFP = dyn_cast<ConstantFP>(C))
880 Elts.push_back(CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
883 return SequentialTy::getFP(V[0]->getContext(), Elts);
886 template <typename SequenceTy>
887 static Constant *getSequenceIfElementsMatch(Constant *C,
888 ArrayRef<Constant *> V) {
889 // We speculatively build the elements here even if it turns out that there is
890 // a constantexpr or something else weird, since it is so uncommon for that to
892 if (ConstantInt *CI = dyn_cast<ConstantInt>(C)) {
893 if (CI->getType()->isIntegerTy(8))
894 return getIntSequenceIfElementsMatch<SequenceTy, uint8_t>(V);
895 else if (CI->getType()->isIntegerTy(16))
896 return getIntSequenceIfElementsMatch<SequenceTy, uint16_t>(V);
897 else if (CI->getType()->isIntegerTy(32))
898 return getIntSequenceIfElementsMatch<SequenceTy, uint32_t>(V);
899 else if (CI->getType()->isIntegerTy(64))
900 return getIntSequenceIfElementsMatch<SequenceTy, uint64_t>(V);
901 } else if (ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
902 if (CFP->getType()->isHalfTy())
903 return getFPSequenceIfElementsMatch<SequenceTy, uint16_t>(V);
904 else if (CFP->getType()->isFloatTy())
905 return getFPSequenceIfElementsMatch<SequenceTy, uint32_t>(V);
906 else if (CFP->getType()->isDoubleTy())
907 return getFPSequenceIfElementsMatch<SequenceTy, uint64_t>(V);
913 ConstantArray::ConstantArray(ArrayType *T, ArrayRef<Constant *> V)
914 : Constant(T, ConstantArrayVal,
915 OperandTraits<ConstantArray>::op_end(this) - V.size(),
917 assert(V.size() == T->getNumElements() &&
918 "Invalid initializer vector for constant array");
919 for (unsigned i = 0, e = V.size(); i != e; ++i)
920 assert(V[i]->getType() == T->getElementType() &&
921 "Initializer for array element doesn't match array element type!");
922 std::copy(V.begin(), V.end(), op_begin());
925 Constant *ConstantArray::get(ArrayType *Ty, ArrayRef<Constant*> V) {
926 if (Constant *C = getImpl(Ty, V))
928 return Ty->getContext().pImpl->ArrayConstants.getOrCreate(Ty, V);
931 Constant *ConstantArray::getImpl(ArrayType *Ty, ArrayRef<Constant*> V) {
932 // Empty arrays are canonicalized to ConstantAggregateZero.
934 return ConstantAggregateZero::get(Ty);
936 for (unsigned i = 0, e = V.size(); i != e; ++i) {
937 assert(V[i]->getType() == Ty->getElementType() &&
938 "Wrong type in array element initializer");
941 // If this is an all-zero array, return a ConstantAggregateZero object. If
942 // all undef, return an UndefValue, if "all simple", then return a
943 // ConstantDataArray.
945 if (isa<UndefValue>(C) && rangeOnlyContains(V.begin(), V.end(), C))
946 return UndefValue::get(Ty);
948 if (C->isNullValue() && rangeOnlyContains(V.begin(), V.end(), C))
949 return ConstantAggregateZero::get(Ty);
951 // Check to see if all of the elements are ConstantFP or ConstantInt and if
952 // the element type is compatible with ConstantDataVector. If so, use it.
953 if (ConstantDataSequential::isElementTypeCompatible(C->getType()))
954 return getSequenceIfElementsMatch<ConstantDataArray>(C, V);
956 // Otherwise, we really do want to create a ConstantArray.
960 /// getTypeForElements - Return an anonymous struct type to use for a constant
961 /// with the specified set of elements. The list must not be empty.
962 StructType *ConstantStruct::getTypeForElements(LLVMContext &Context,
963 ArrayRef<Constant*> V,
965 unsigned VecSize = V.size();
966 SmallVector<Type*, 16> EltTypes(VecSize);
967 for (unsigned i = 0; i != VecSize; ++i)
968 EltTypes[i] = V[i]->getType();
970 return StructType::get(Context, EltTypes, Packed);
974 StructType *ConstantStruct::getTypeForElements(ArrayRef<Constant*> V,
977 "ConstantStruct::getTypeForElements cannot be called on empty list");
978 return getTypeForElements(V[0]->getContext(), V, Packed);
982 ConstantStruct::ConstantStruct(StructType *T, ArrayRef<Constant *> V)
983 : Constant(T, ConstantStructVal,
984 OperandTraits<ConstantStruct>::op_end(this) - V.size(),
986 assert(V.size() == T->getNumElements() &&
987 "Invalid initializer vector for constant structure");
988 for (unsigned i = 0, e = V.size(); i != e; ++i)
989 assert((T->isOpaque() || V[i]->getType() == T->getElementType(i)) &&
990 "Initializer for struct element doesn't match struct element type!");
991 std::copy(V.begin(), V.end(), op_begin());
994 // ConstantStruct accessors.
995 Constant *ConstantStruct::get(StructType *ST, ArrayRef<Constant*> V) {
996 assert((ST->isOpaque() || ST->getNumElements() == V.size()) &&
997 "Incorrect # elements specified to ConstantStruct::get");
999 // Create a ConstantAggregateZero value if all elements are zeros.
1001 bool isUndef = false;
1004 isUndef = isa<UndefValue>(V[0]);
1005 isZero = V[0]->isNullValue();
1006 if (isUndef || isZero) {
1007 for (unsigned i = 0, e = V.size(); i != e; ++i) {
1008 if (!V[i]->isNullValue())
1010 if (!isa<UndefValue>(V[i]))
1016 return ConstantAggregateZero::get(ST);
1018 return UndefValue::get(ST);
1020 return ST->getContext().pImpl->StructConstants.getOrCreate(ST, V);
1023 Constant *ConstantStruct::get(StructType *T, ...) {
1025 SmallVector<Constant*, 8> Values;
1027 while (Constant *Val = va_arg(ap, llvm::Constant*))
1028 Values.push_back(Val);
1030 return get(T, Values);
1033 ConstantVector::ConstantVector(VectorType *T, ArrayRef<Constant *> V)
1034 : Constant(T, ConstantVectorVal,
1035 OperandTraits<ConstantVector>::op_end(this) - V.size(),
1037 for (size_t i = 0, e = V.size(); i != e; i++)
1038 assert(V[i]->getType() == T->getElementType() &&
1039 "Initializer for vector element doesn't match vector element type!");
1040 std::copy(V.begin(), V.end(), op_begin());
1043 // ConstantVector accessors.
1044 Constant *ConstantVector::get(ArrayRef<Constant*> V) {
1045 if (Constant *C = getImpl(V))
1047 VectorType *Ty = VectorType::get(V.front()->getType(), V.size());
1048 return Ty->getContext().pImpl->VectorConstants.getOrCreate(Ty, V);
1051 Constant *ConstantVector::getImpl(ArrayRef<Constant*> V) {
1052 assert(!V.empty() && "Vectors can't be empty");
1053 VectorType *T = VectorType::get(V.front()->getType(), V.size());
1055 // If this is an all-undef or all-zero vector, return a
1056 // ConstantAggregateZero or UndefValue.
1058 bool isZero = C->isNullValue();
1059 bool isUndef = isa<UndefValue>(C);
1061 if (isZero || isUndef) {
1062 for (unsigned i = 1, e = V.size(); i != e; ++i)
1064 isZero = isUndef = false;
1070 return ConstantAggregateZero::get(T);
1072 return UndefValue::get(T);
1074 // Check to see if all of the elements are ConstantFP or ConstantInt and if
1075 // the element type is compatible with ConstantDataVector. If so, use it.
1076 if (ConstantDataSequential::isElementTypeCompatible(C->getType()))
1077 return getSequenceIfElementsMatch<ConstantDataVector>(C, V);
1079 // Otherwise, the element type isn't compatible with ConstantDataVector, or
1080 // the operand list constants a ConstantExpr or something else strange.
1084 Constant *ConstantVector::getSplat(unsigned NumElts, Constant *V) {
1085 // If this splat is compatible with ConstantDataVector, use it instead of
1087 if ((isa<ConstantFP>(V) || isa<ConstantInt>(V)) &&
1088 ConstantDataSequential::isElementTypeCompatible(V->getType()))
1089 return ConstantDataVector::getSplat(NumElts, V);
1091 SmallVector<Constant*, 32> Elts(NumElts, V);
1095 ConstantTokenNone *ConstantTokenNone::get(LLVMContext &Context) {
1096 LLVMContextImpl *pImpl = Context.pImpl;
1097 if (!pImpl->TheNoneToken)
1098 pImpl->TheNoneToken.reset(new ConstantTokenNone(Context));
1099 return pImpl->TheNoneToken.get();
1102 /// Remove the constant from the constant table.
1103 void ConstantTokenNone::destroyConstantImpl() {
1104 llvm_unreachable("You can't ConstantTokenNone->destroyConstantImpl()!");
1107 // Utility function for determining if a ConstantExpr is a CastOp or not. This
1108 // can't be inline because we don't want to #include Instruction.h into
1110 bool ConstantExpr::isCast() const {
1111 return Instruction::isCast(getOpcode());
1114 bool ConstantExpr::isCompare() const {
1115 return getOpcode() == Instruction::ICmp || getOpcode() == Instruction::FCmp;
1118 bool ConstantExpr::isGEPWithNoNotionalOverIndexing() const {
1119 if (getOpcode() != Instruction::GetElementPtr) return false;
1121 gep_type_iterator GEPI = gep_type_begin(this), E = gep_type_end(this);
1122 User::const_op_iterator OI = std::next(this->op_begin());
1124 // Skip the first index, as it has no static limit.
1128 // The remaining indices must be compile-time known integers within the
1129 // bounds of the corresponding notional static array types.
1130 for (; GEPI != E; ++GEPI, ++OI) {
1131 ConstantInt *CI = dyn_cast<ConstantInt>(*OI);
1132 if (!CI) return false;
1133 if (ArrayType *ATy = dyn_cast<ArrayType>(*GEPI))
1134 if (CI->getValue().getActiveBits() > 64 ||
1135 CI->getZExtValue() >= ATy->getNumElements())
1139 // All the indices checked out.
1143 bool ConstantExpr::hasIndices() const {
1144 return getOpcode() == Instruction::ExtractValue ||
1145 getOpcode() == Instruction::InsertValue;
1148 ArrayRef<unsigned> ConstantExpr::getIndices() const {
1149 if (const ExtractValueConstantExpr *EVCE =
1150 dyn_cast<ExtractValueConstantExpr>(this))
1151 return EVCE->Indices;
1153 return cast<InsertValueConstantExpr>(this)->Indices;
1156 unsigned ConstantExpr::getPredicate() const {
1157 assert(isCompare());
1158 return ((const CompareConstantExpr*)this)->predicate;
1161 /// getWithOperandReplaced - Return a constant expression identical to this
1162 /// one, but with the specified operand set to the specified value.
1164 ConstantExpr::getWithOperandReplaced(unsigned OpNo, Constant *Op) const {
1165 assert(Op->getType() == getOperand(OpNo)->getType() &&
1166 "Replacing operand with value of different type!");
1167 if (getOperand(OpNo) == Op)
1168 return const_cast<ConstantExpr*>(this);
1170 SmallVector<Constant*, 8> NewOps;
1171 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
1172 NewOps.push_back(i == OpNo ? Op : getOperand(i));
1174 return getWithOperands(NewOps);
1177 /// getWithOperands - This returns the current constant expression with the
1178 /// operands replaced with the specified values. The specified array must
1179 /// have the same number of operands as our current one.
1180 Constant *ConstantExpr::getWithOperands(ArrayRef<Constant *> Ops, Type *Ty,
1181 bool OnlyIfReduced, Type *SrcTy) const {
1182 assert(Ops.size() == getNumOperands() && "Operand count mismatch!");
1184 // If no operands changed return self.
1185 if (Ty == getType() && std::equal(Ops.begin(), Ops.end(), op_begin()))
1186 return const_cast<ConstantExpr*>(this);
1188 Type *OnlyIfReducedTy = OnlyIfReduced ? Ty : nullptr;
1189 switch (getOpcode()) {
1190 case Instruction::Trunc:
1191 case Instruction::ZExt:
1192 case Instruction::SExt:
1193 case Instruction::FPTrunc:
1194 case Instruction::FPExt:
1195 case Instruction::UIToFP:
1196 case Instruction::SIToFP:
1197 case Instruction::FPToUI:
1198 case Instruction::FPToSI:
1199 case Instruction::PtrToInt:
1200 case Instruction::IntToPtr:
1201 case Instruction::BitCast:
1202 case Instruction::AddrSpaceCast:
1203 return ConstantExpr::getCast(getOpcode(), Ops[0], Ty, OnlyIfReduced);
1204 case Instruction::Select:
1205 return ConstantExpr::getSelect(Ops[0], Ops[1], Ops[2], OnlyIfReducedTy);
1206 case Instruction::InsertElement:
1207 return ConstantExpr::getInsertElement(Ops[0], Ops[1], Ops[2],
1209 case Instruction::ExtractElement:
1210 return ConstantExpr::getExtractElement(Ops[0], Ops[1], OnlyIfReducedTy);
1211 case Instruction::InsertValue:
1212 return ConstantExpr::getInsertValue(Ops[0], Ops[1], getIndices(),
1214 case Instruction::ExtractValue:
1215 return ConstantExpr::getExtractValue(Ops[0], getIndices(), OnlyIfReducedTy);
1216 case Instruction::ShuffleVector:
1217 return ConstantExpr::getShuffleVector(Ops[0], Ops[1], Ops[2],
1219 case Instruction::GetElementPtr: {
1220 auto *GEPO = cast<GEPOperator>(this);
1221 assert(SrcTy || (Ops[0]->getType() == getOperand(0)->getType()));
1222 return ConstantExpr::getGetElementPtr(
1223 SrcTy ? SrcTy : GEPO->getSourceElementType(), Ops[0], Ops.slice(1),
1224 GEPO->isInBounds(), OnlyIfReducedTy);
1226 case Instruction::ICmp:
1227 case Instruction::FCmp:
1228 return ConstantExpr::getCompare(getPredicate(), Ops[0], Ops[1],
1231 assert(getNumOperands() == 2 && "Must be binary operator?");
1232 return ConstantExpr::get(getOpcode(), Ops[0], Ops[1], SubclassOptionalData,
1238 //===----------------------------------------------------------------------===//
1239 // isValueValidForType implementations
1241 bool ConstantInt::isValueValidForType(Type *Ty, uint64_t Val) {
1242 unsigned NumBits = Ty->getIntegerBitWidth(); // assert okay
1243 if (Ty->isIntegerTy(1))
1244 return Val == 0 || Val == 1;
1246 return true; // always true, has to fit in largest type
1247 uint64_t Max = (1ll << NumBits) - 1;
1251 bool ConstantInt::isValueValidForType(Type *Ty, int64_t Val) {
1252 unsigned NumBits = Ty->getIntegerBitWidth();
1253 if (Ty->isIntegerTy(1))
1254 return Val == 0 || Val == 1 || Val == -1;
1256 return true; // always true, has to fit in largest type
1257 int64_t Min = -(1ll << (NumBits-1));
1258 int64_t Max = (1ll << (NumBits-1)) - 1;
1259 return (Val >= Min && Val <= Max);
1262 bool ConstantFP::isValueValidForType(Type *Ty, const APFloat& Val) {
1263 // convert modifies in place, so make a copy.
1264 APFloat Val2 = APFloat(Val);
1266 switch (Ty->getTypeID()) {
1268 return false; // These can't be represented as floating point!
1270 // FIXME rounding mode needs to be more flexible
1271 case Type::HalfTyID: {
1272 if (&Val2.getSemantics() == &APFloat::IEEEhalf)
1274 Val2.convert(APFloat::IEEEhalf, APFloat::rmNearestTiesToEven, &losesInfo);
1277 case Type::FloatTyID: {
1278 if (&Val2.getSemantics() == &APFloat::IEEEsingle)
1280 Val2.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, &losesInfo);
1283 case Type::DoubleTyID: {
1284 if (&Val2.getSemantics() == &APFloat::IEEEhalf ||
1285 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1286 &Val2.getSemantics() == &APFloat::IEEEdouble)
1288 Val2.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &losesInfo);
1291 case Type::X86_FP80TyID:
1292 return &Val2.getSemantics() == &APFloat::IEEEhalf ||
1293 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1294 &Val2.getSemantics() == &APFloat::IEEEdouble ||
1295 &Val2.getSemantics() == &APFloat::x87DoubleExtended;
1296 case Type::FP128TyID:
1297 return &Val2.getSemantics() == &APFloat::IEEEhalf ||
1298 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1299 &Val2.getSemantics() == &APFloat::IEEEdouble ||
1300 &Val2.getSemantics() == &APFloat::IEEEquad;
1301 case Type::PPC_FP128TyID:
1302 return &Val2.getSemantics() == &APFloat::IEEEhalf ||
1303 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1304 &Val2.getSemantics() == &APFloat::IEEEdouble ||
1305 &Val2.getSemantics() == &APFloat::PPCDoubleDouble;
1310 //===----------------------------------------------------------------------===//
1311 // Factory Function Implementation
1313 ConstantAggregateZero *ConstantAggregateZero::get(Type *Ty) {
1314 assert((Ty->isStructTy() || Ty->isArrayTy() || Ty->isVectorTy()) &&
1315 "Cannot create an aggregate zero of non-aggregate type!");
1317 ConstantAggregateZero *&Entry = Ty->getContext().pImpl->CAZConstants[Ty];
1319 Entry = new ConstantAggregateZero(Ty);
1324 /// destroyConstant - Remove the constant from the constant table.
1326 void ConstantAggregateZero::destroyConstantImpl() {
1327 getContext().pImpl->CAZConstants.erase(getType());
1330 /// destroyConstant - Remove the constant from the constant table...
1332 void ConstantArray::destroyConstantImpl() {
1333 getType()->getContext().pImpl->ArrayConstants.remove(this);
1337 //---- ConstantStruct::get() implementation...
1340 // destroyConstant - Remove the constant from the constant table...
1342 void ConstantStruct::destroyConstantImpl() {
1343 getType()->getContext().pImpl->StructConstants.remove(this);
1346 // destroyConstant - Remove the constant from the constant table...
1348 void ConstantVector::destroyConstantImpl() {
1349 getType()->getContext().pImpl->VectorConstants.remove(this);
1352 /// getSplatValue - If this is a splat vector constant, meaning that all of
1353 /// the elements have the same value, return that value. Otherwise return 0.
1354 Constant *Constant::getSplatValue() const {
1355 assert(this->getType()->isVectorTy() && "Only valid for vectors!");
1356 if (isa<ConstantAggregateZero>(this))
1357 return getNullValue(this->getType()->getVectorElementType());
1358 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
1359 return CV->getSplatValue();
1360 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
1361 return CV->getSplatValue();
1365 /// getSplatValue - If this is a splat constant, where all of the
1366 /// elements have the same value, return that value. Otherwise return null.
1367 Constant *ConstantVector::getSplatValue() const {
1368 // Check out first element.
1369 Constant *Elt = getOperand(0);
1370 // Then make sure all remaining elements point to the same value.
1371 for (unsigned I = 1, E = getNumOperands(); I < E; ++I)
1372 if (getOperand(I) != Elt)
1377 /// If C is a constant integer then return its value, otherwise C must be a
1378 /// vector of constant integers, all equal, and the common value is returned.
1379 const APInt &Constant::getUniqueInteger() const {
1380 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
1381 return CI->getValue();
1382 assert(this->getSplatValue() && "Doesn't contain a unique integer!");
1383 const Constant *C = this->getAggregateElement(0U);
1384 assert(C && isa<ConstantInt>(C) && "Not a vector of numbers!");
1385 return cast<ConstantInt>(C)->getValue();
1388 //---- ConstantPointerNull::get() implementation.
1391 ConstantPointerNull *ConstantPointerNull::get(PointerType *Ty) {
1392 ConstantPointerNull *&Entry = Ty->getContext().pImpl->CPNConstants[Ty];
1394 Entry = new ConstantPointerNull(Ty);
1399 // destroyConstant - Remove the constant from the constant table...
1401 void ConstantPointerNull::destroyConstantImpl() {
1402 getContext().pImpl->CPNConstants.erase(getType());
1406 //---- UndefValue::get() implementation.
1409 UndefValue *UndefValue::get(Type *Ty) {
1410 UndefValue *&Entry = Ty->getContext().pImpl->UVConstants[Ty];
1412 Entry = new UndefValue(Ty);
1417 // destroyConstant - Remove the constant from the constant table.
1419 void UndefValue::destroyConstantImpl() {
1420 // Free the constant and any dangling references to it.
1421 getContext().pImpl->UVConstants.erase(getType());
1424 //---- BlockAddress::get() implementation.
1427 BlockAddress *BlockAddress::get(BasicBlock *BB) {
1428 assert(BB->getParent() && "Block must have a parent");
1429 return get(BB->getParent(), BB);
1432 BlockAddress *BlockAddress::get(Function *F, BasicBlock *BB) {
1434 F->getContext().pImpl->BlockAddresses[std::make_pair(F, BB)];
1436 BA = new BlockAddress(F, BB);
1438 assert(BA->getFunction() == F && "Basic block moved between functions");
1442 BlockAddress::BlockAddress(Function *F, BasicBlock *BB)
1443 : Constant(Type::getInt8PtrTy(F->getContext()), Value::BlockAddressVal,
1447 BB->AdjustBlockAddressRefCount(1);
1450 BlockAddress *BlockAddress::lookup(const BasicBlock *BB) {
1451 if (!BB->hasAddressTaken())
1454 const Function *F = BB->getParent();
1455 assert(F && "Block must have a parent");
1457 F->getContext().pImpl->BlockAddresses.lookup(std::make_pair(F, BB));
1458 assert(BA && "Refcount and block address map disagree!");
1462 // destroyConstant - Remove the constant from the constant table.
1464 void BlockAddress::destroyConstantImpl() {
1465 getFunction()->getType()->getContext().pImpl
1466 ->BlockAddresses.erase(std::make_pair(getFunction(), getBasicBlock()));
1467 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1470 Value *BlockAddress::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
1471 // This could be replacing either the Basic Block or the Function. In either
1472 // case, we have to remove the map entry.
1473 Function *NewF = getFunction();
1474 BasicBlock *NewBB = getBasicBlock();
1477 NewF = cast<Function>(To->stripPointerCasts());
1479 NewBB = cast<BasicBlock>(To);
1481 // See if the 'new' entry already exists, if not, just update this in place
1482 // and return early.
1483 BlockAddress *&NewBA =
1484 getContext().pImpl->BlockAddresses[std::make_pair(NewF, NewBB)];
1488 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1490 // Remove the old entry, this can't cause the map to rehash (just a
1491 // tombstone will get added).
1492 getContext().pImpl->BlockAddresses.erase(std::make_pair(getFunction(),
1495 setOperand(0, NewF);
1496 setOperand(1, NewBB);
1497 getBasicBlock()->AdjustBlockAddressRefCount(1);
1499 // If we just want to keep the existing value, then return null.
1500 // Callers know that this means we shouldn't delete this value.
1504 //---- ConstantExpr::get() implementations.
1507 /// This is a utility function to handle folding of casts and lookup of the
1508 /// cast in the ExprConstants map. It is used by the various get* methods below.
1509 static Constant *getFoldedCast(Instruction::CastOps opc, Constant *C, Type *Ty,
1510 bool OnlyIfReduced = false) {
1511 assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
1512 // Fold a few common cases
1513 if (Constant *FC = ConstantFoldCastInstruction(opc, C, Ty))
1519 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
1521 // Look up the constant in the table first to ensure uniqueness.
1522 ConstantExprKeyType Key(opc, C);
1524 return pImpl->ExprConstants.getOrCreate(Ty, Key);
1527 Constant *ConstantExpr::getCast(unsigned oc, Constant *C, Type *Ty,
1528 bool OnlyIfReduced) {
1529 Instruction::CastOps opc = Instruction::CastOps(oc);
1530 assert(Instruction::isCast(opc) && "opcode out of range");
1531 assert(C && Ty && "Null arguments to getCast");
1532 assert(CastInst::castIsValid(opc, C, Ty) && "Invalid constantexpr cast!");
1536 llvm_unreachable("Invalid cast opcode");
1537 case Instruction::Trunc:
1538 return getTrunc(C, Ty, OnlyIfReduced);
1539 case Instruction::ZExt:
1540 return getZExt(C, Ty, OnlyIfReduced);
1541 case Instruction::SExt:
1542 return getSExt(C, Ty, OnlyIfReduced);
1543 case Instruction::FPTrunc:
1544 return getFPTrunc(C, Ty, OnlyIfReduced);
1545 case Instruction::FPExt:
1546 return getFPExtend(C, Ty, OnlyIfReduced);
1547 case Instruction::UIToFP:
1548 return getUIToFP(C, Ty, OnlyIfReduced);
1549 case Instruction::SIToFP:
1550 return getSIToFP(C, Ty, OnlyIfReduced);
1551 case Instruction::FPToUI:
1552 return getFPToUI(C, Ty, OnlyIfReduced);
1553 case Instruction::FPToSI:
1554 return getFPToSI(C, Ty, OnlyIfReduced);
1555 case Instruction::PtrToInt:
1556 return getPtrToInt(C, Ty, OnlyIfReduced);
1557 case Instruction::IntToPtr:
1558 return getIntToPtr(C, Ty, OnlyIfReduced);
1559 case Instruction::BitCast:
1560 return getBitCast(C, Ty, OnlyIfReduced);
1561 case Instruction::AddrSpaceCast:
1562 return getAddrSpaceCast(C, Ty, OnlyIfReduced);
1566 Constant *ConstantExpr::getZExtOrBitCast(Constant *C, Type *Ty) {
1567 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1568 return getBitCast(C, Ty);
1569 return getZExt(C, Ty);
1572 Constant *ConstantExpr::getSExtOrBitCast(Constant *C, Type *Ty) {
1573 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1574 return getBitCast(C, Ty);
1575 return getSExt(C, Ty);
1578 Constant *ConstantExpr::getTruncOrBitCast(Constant *C, Type *Ty) {
1579 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1580 return getBitCast(C, Ty);
1581 return getTrunc(C, Ty);
1584 Constant *ConstantExpr::getPointerCast(Constant *S, Type *Ty) {
1585 assert(S->getType()->isPtrOrPtrVectorTy() && "Invalid cast");
1586 assert((Ty->isIntOrIntVectorTy() || Ty->isPtrOrPtrVectorTy()) &&
1589 if (Ty->isIntOrIntVectorTy())
1590 return getPtrToInt(S, Ty);
1592 unsigned SrcAS = S->getType()->getPointerAddressSpace();
1593 if (Ty->isPtrOrPtrVectorTy() && SrcAS != Ty->getPointerAddressSpace())
1594 return getAddrSpaceCast(S, Ty);
1596 return getBitCast(S, Ty);
1599 Constant *ConstantExpr::getPointerBitCastOrAddrSpaceCast(Constant *S,
1601 assert(S->getType()->isPtrOrPtrVectorTy() && "Invalid cast");
1602 assert(Ty->isPtrOrPtrVectorTy() && "Invalid cast");
1604 if (S->getType()->getPointerAddressSpace() != Ty->getPointerAddressSpace())
1605 return getAddrSpaceCast(S, Ty);
1607 return getBitCast(S, Ty);
1610 Constant *ConstantExpr::getIntegerCast(Constant *C, Type *Ty,
1612 assert(C->getType()->isIntOrIntVectorTy() &&
1613 Ty->isIntOrIntVectorTy() && "Invalid cast");
1614 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1615 unsigned DstBits = Ty->getScalarSizeInBits();
1616 Instruction::CastOps opcode =
1617 (SrcBits == DstBits ? Instruction::BitCast :
1618 (SrcBits > DstBits ? Instruction::Trunc :
1619 (isSigned ? Instruction::SExt : Instruction::ZExt)));
1620 return getCast(opcode, C, Ty);
1623 Constant *ConstantExpr::getFPCast(Constant *C, Type *Ty) {
1624 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1626 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1627 unsigned DstBits = Ty->getScalarSizeInBits();
1628 if (SrcBits == DstBits)
1629 return C; // Avoid a useless cast
1630 Instruction::CastOps opcode =
1631 (SrcBits > DstBits ? Instruction::FPTrunc : Instruction::FPExt);
1632 return getCast(opcode, C, Ty);
1635 Constant *ConstantExpr::getTrunc(Constant *C, Type *Ty, bool OnlyIfReduced) {
1637 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1638 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1640 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1641 assert(C->getType()->isIntOrIntVectorTy() && "Trunc operand must be integer");
1642 assert(Ty->isIntOrIntVectorTy() && "Trunc produces only integral");
1643 assert(C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1644 "SrcTy must be larger than DestTy for Trunc!");
1646 return getFoldedCast(Instruction::Trunc, C, Ty, OnlyIfReduced);
1649 Constant *ConstantExpr::getSExt(Constant *C, Type *Ty, bool OnlyIfReduced) {
1651 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1652 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1654 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1655 assert(C->getType()->isIntOrIntVectorTy() && "SExt operand must be integral");
1656 assert(Ty->isIntOrIntVectorTy() && "SExt produces only integer");
1657 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1658 "SrcTy must be smaller than DestTy for SExt!");
1660 return getFoldedCast(Instruction::SExt, C, Ty, OnlyIfReduced);
1663 Constant *ConstantExpr::getZExt(Constant *C, Type *Ty, bool OnlyIfReduced) {
1665 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1666 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1668 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1669 assert(C->getType()->isIntOrIntVectorTy() && "ZEXt operand must be integral");
1670 assert(Ty->isIntOrIntVectorTy() && "ZExt produces only integer");
1671 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1672 "SrcTy must be smaller than DestTy for ZExt!");
1674 return getFoldedCast(Instruction::ZExt, C, Ty, OnlyIfReduced);
1677 Constant *ConstantExpr::getFPTrunc(Constant *C, Type *Ty, bool OnlyIfReduced) {
1679 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1680 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1682 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1683 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1684 C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1685 "This is an illegal floating point truncation!");
1686 return getFoldedCast(Instruction::FPTrunc, C, Ty, OnlyIfReduced);
1689 Constant *ConstantExpr::getFPExtend(Constant *C, Type *Ty, bool OnlyIfReduced) {
1691 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1692 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1694 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1695 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1696 C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1697 "This is an illegal floating point extension!");
1698 return getFoldedCast(Instruction::FPExt, C, Ty, OnlyIfReduced);
1701 Constant *ConstantExpr::getUIToFP(Constant *C, Type *Ty, bool OnlyIfReduced) {
1703 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1704 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1706 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1707 assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1708 "This is an illegal uint to floating point cast!");
1709 return getFoldedCast(Instruction::UIToFP, C, Ty, OnlyIfReduced);
1712 Constant *ConstantExpr::getSIToFP(Constant *C, Type *Ty, bool OnlyIfReduced) {
1714 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1715 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1717 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1718 assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1719 "This is an illegal sint to floating point cast!");
1720 return getFoldedCast(Instruction::SIToFP, C, Ty, OnlyIfReduced);
1723 Constant *ConstantExpr::getFPToUI(Constant *C, Type *Ty, bool OnlyIfReduced) {
1725 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1726 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1728 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1729 assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1730 "This is an illegal floating point to uint cast!");
1731 return getFoldedCast(Instruction::FPToUI, C, Ty, OnlyIfReduced);
1734 Constant *ConstantExpr::getFPToSI(Constant *C, Type *Ty, bool OnlyIfReduced) {
1736 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1737 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1739 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1740 assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1741 "This is an illegal floating point to sint cast!");
1742 return getFoldedCast(Instruction::FPToSI, C, Ty, OnlyIfReduced);
1745 Constant *ConstantExpr::getPtrToInt(Constant *C, Type *DstTy,
1746 bool OnlyIfReduced) {
1747 assert(C->getType()->getScalarType()->isPointerTy() &&
1748 "PtrToInt source must be pointer or pointer vector");
1749 assert(DstTy->getScalarType()->isIntegerTy() &&
1750 "PtrToInt destination must be integer or integer vector");
1751 assert(isa<VectorType>(C->getType()) == isa<VectorType>(DstTy));
1752 if (isa<VectorType>(C->getType()))
1753 assert(C->getType()->getVectorNumElements()==DstTy->getVectorNumElements()&&
1754 "Invalid cast between a different number of vector elements");
1755 return getFoldedCast(Instruction::PtrToInt, C, DstTy, OnlyIfReduced);
1758 Constant *ConstantExpr::getIntToPtr(Constant *C, Type *DstTy,
1759 bool OnlyIfReduced) {
1760 assert(C->getType()->getScalarType()->isIntegerTy() &&
1761 "IntToPtr source must be integer or integer vector");
1762 assert(DstTy->getScalarType()->isPointerTy() &&
1763 "IntToPtr destination must be a pointer or pointer vector");
1764 assert(isa<VectorType>(C->getType()) == isa<VectorType>(DstTy));
1765 if (isa<VectorType>(C->getType()))
1766 assert(C->getType()->getVectorNumElements()==DstTy->getVectorNumElements()&&
1767 "Invalid cast between a different number of vector elements");
1768 return getFoldedCast(Instruction::IntToPtr, C, DstTy, OnlyIfReduced);
1771 Constant *ConstantExpr::getBitCast(Constant *C, Type *DstTy,
1772 bool OnlyIfReduced) {
1773 assert(CastInst::castIsValid(Instruction::BitCast, C, DstTy) &&
1774 "Invalid constantexpr bitcast!");
1776 // It is common to ask for a bitcast of a value to its own type, handle this
1778 if (C->getType() == DstTy) return C;
1780 return getFoldedCast(Instruction::BitCast, C, DstTy, OnlyIfReduced);
1783 Constant *ConstantExpr::getAddrSpaceCast(Constant *C, Type *DstTy,
1784 bool OnlyIfReduced) {
1785 assert(CastInst::castIsValid(Instruction::AddrSpaceCast, C, DstTy) &&
1786 "Invalid constantexpr addrspacecast!");
1788 // Canonicalize addrspacecasts between different pointer types by first
1789 // bitcasting the pointer type and then converting the address space.
1790 PointerType *SrcScalarTy = cast<PointerType>(C->getType()->getScalarType());
1791 PointerType *DstScalarTy = cast<PointerType>(DstTy->getScalarType());
1792 Type *DstElemTy = DstScalarTy->getElementType();
1793 if (SrcScalarTy->getElementType() != DstElemTy) {
1794 Type *MidTy = PointerType::get(DstElemTy, SrcScalarTy->getAddressSpace());
1795 if (VectorType *VT = dyn_cast<VectorType>(DstTy)) {
1796 // Handle vectors of pointers.
1797 MidTy = VectorType::get(MidTy, VT->getNumElements());
1799 C = getBitCast(C, MidTy);
1801 return getFoldedCast(Instruction::AddrSpaceCast, C, DstTy, OnlyIfReduced);
1804 Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2,
1805 unsigned Flags, Type *OnlyIfReducedTy) {
1806 // Check the operands for consistency first.
1807 assert(Opcode >= Instruction::BinaryOpsBegin &&
1808 Opcode < Instruction::BinaryOpsEnd &&
1809 "Invalid opcode in binary constant expression");
1810 assert(C1->getType() == C2->getType() &&
1811 "Operand types in binary constant expression should match");
1815 case Instruction::Add:
1816 case Instruction::Sub:
1817 case Instruction::Mul:
1818 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1819 assert(C1->getType()->isIntOrIntVectorTy() &&
1820 "Tried to create an integer operation on a non-integer type!");
1822 case Instruction::FAdd:
1823 case Instruction::FSub:
1824 case Instruction::FMul:
1825 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1826 assert(C1->getType()->isFPOrFPVectorTy() &&
1827 "Tried to create a floating-point operation on a "
1828 "non-floating-point type!");
1830 case Instruction::UDiv:
1831 case Instruction::SDiv:
1832 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1833 assert(C1->getType()->isIntOrIntVectorTy() &&
1834 "Tried to create an arithmetic operation on a non-arithmetic type!");
1836 case Instruction::FDiv:
1837 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1838 assert(C1->getType()->isFPOrFPVectorTy() &&
1839 "Tried to create an arithmetic operation on a non-arithmetic type!");
1841 case Instruction::URem:
1842 case Instruction::SRem:
1843 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1844 assert(C1->getType()->isIntOrIntVectorTy() &&
1845 "Tried to create an arithmetic operation on a non-arithmetic type!");
1847 case Instruction::FRem:
1848 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1849 assert(C1->getType()->isFPOrFPVectorTy() &&
1850 "Tried to create an arithmetic operation on a non-arithmetic type!");
1852 case Instruction::And:
1853 case Instruction::Or:
1854 case Instruction::Xor:
1855 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1856 assert(C1->getType()->isIntOrIntVectorTy() &&
1857 "Tried to create a logical operation on a non-integral type!");
1859 case Instruction::Shl:
1860 case Instruction::LShr:
1861 case Instruction::AShr:
1862 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1863 assert(C1->getType()->isIntOrIntVectorTy() &&
1864 "Tried to create a shift operation on a non-integer type!");
1871 if (Constant *FC = ConstantFoldBinaryInstruction(Opcode, C1, C2))
1872 return FC; // Fold a few common cases.
1874 if (OnlyIfReducedTy == C1->getType())
1877 Constant *ArgVec[] = { C1, C2 };
1878 ConstantExprKeyType Key(Opcode, ArgVec, 0, Flags);
1880 LLVMContextImpl *pImpl = C1->getContext().pImpl;
1881 return pImpl->ExprConstants.getOrCreate(C1->getType(), Key);
1884 Constant *ConstantExpr::getSizeOf(Type* Ty) {
1885 // sizeof is implemented as: (i64) gep (Ty*)null, 1
1886 // Note that a non-inbounds gep is used, as null isn't within any object.
1887 Constant *GEPIdx = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1888 Constant *GEP = getGetElementPtr(
1889 Ty, Constant::getNullValue(PointerType::getUnqual(Ty)), GEPIdx);
1890 return getPtrToInt(GEP,
1891 Type::getInt64Ty(Ty->getContext()));
1894 Constant *ConstantExpr::getAlignOf(Type* Ty) {
1895 // alignof is implemented as: (i64) gep ({i1,Ty}*)null, 0, 1
1896 // Note that a non-inbounds gep is used, as null isn't within any object.
1898 StructType::get(Type::getInt1Ty(Ty->getContext()), Ty, nullptr);
1899 Constant *NullPtr = Constant::getNullValue(AligningTy->getPointerTo(0));
1900 Constant *Zero = ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0);
1901 Constant *One = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1902 Constant *Indices[2] = { Zero, One };
1903 Constant *GEP = getGetElementPtr(AligningTy, NullPtr, Indices);
1904 return getPtrToInt(GEP,
1905 Type::getInt64Ty(Ty->getContext()));
1908 Constant *ConstantExpr::getOffsetOf(StructType* STy, unsigned FieldNo) {
1909 return getOffsetOf(STy, ConstantInt::get(Type::getInt32Ty(STy->getContext()),
1913 Constant *ConstantExpr::getOffsetOf(Type* Ty, Constant *FieldNo) {
1914 // offsetof is implemented as: (i64) gep (Ty*)null, 0, FieldNo
1915 // Note that a non-inbounds gep is used, as null isn't within any object.
1916 Constant *GEPIdx[] = {
1917 ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0),
1920 Constant *GEP = getGetElementPtr(
1921 Ty, Constant::getNullValue(PointerType::getUnqual(Ty)), GEPIdx);
1922 return getPtrToInt(GEP,
1923 Type::getInt64Ty(Ty->getContext()));
1926 Constant *ConstantExpr::getCompare(unsigned short Predicate, Constant *C1,
1927 Constant *C2, bool OnlyIfReduced) {
1928 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1930 switch (Predicate) {
1931 default: llvm_unreachable("Invalid CmpInst predicate");
1932 case CmpInst::FCMP_FALSE: case CmpInst::FCMP_OEQ: case CmpInst::FCMP_OGT:
1933 case CmpInst::FCMP_OGE: case CmpInst::FCMP_OLT: case CmpInst::FCMP_OLE:
1934 case CmpInst::FCMP_ONE: case CmpInst::FCMP_ORD: case CmpInst::FCMP_UNO:
1935 case CmpInst::FCMP_UEQ: case CmpInst::FCMP_UGT: case CmpInst::FCMP_UGE:
1936 case CmpInst::FCMP_ULT: case CmpInst::FCMP_ULE: case CmpInst::FCMP_UNE:
1937 case CmpInst::FCMP_TRUE:
1938 return getFCmp(Predicate, C1, C2, OnlyIfReduced);
1940 case CmpInst::ICMP_EQ: case CmpInst::ICMP_NE: case CmpInst::ICMP_UGT:
1941 case CmpInst::ICMP_UGE: case CmpInst::ICMP_ULT: case CmpInst::ICMP_ULE:
1942 case CmpInst::ICMP_SGT: case CmpInst::ICMP_SGE: case CmpInst::ICMP_SLT:
1943 case CmpInst::ICMP_SLE:
1944 return getICmp(Predicate, C1, C2, OnlyIfReduced);
1948 Constant *ConstantExpr::getSelect(Constant *C, Constant *V1, Constant *V2,
1949 Type *OnlyIfReducedTy) {
1950 assert(!SelectInst::areInvalidOperands(C, V1, V2)&&"Invalid select operands");
1952 if (Constant *SC = ConstantFoldSelectInstruction(C, V1, V2))
1953 return SC; // Fold common cases
1955 if (OnlyIfReducedTy == V1->getType())
1958 Constant *ArgVec[] = { C, V1, V2 };
1959 ConstantExprKeyType Key(Instruction::Select, ArgVec);
1961 LLVMContextImpl *pImpl = C->getContext().pImpl;
1962 return pImpl->ExprConstants.getOrCreate(V1->getType(), Key);
1965 Constant *ConstantExpr::getGetElementPtr(Type *Ty, Constant *C,
1966 ArrayRef<Value *> Idxs, bool InBounds,
1967 Type *OnlyIfReducedTy) {
1969 Ty = cast<PointerType>(C->getType()->getScalarType())->getElementType();
1973 cast<PointerType>(C->getType()->getScalarType())->getContainedType(0u));
1975 if (Constant *FC = ConstantFoldGetElementPtr(Ty, C, InBounds, Idxs))
1976 return FC; // Fold a few common cases.
1978 // Get the result type of the getelementptr!
1979 Type *DestTy = GetElementPtrInst::getIndexedType(Ty, Idxs);
1980 assert(DestTy && "GEP indices invalid!");
1981 unsigned AS = C->getType()->getPointerAddressSpace();
1982 Type *ReqTy = DestTy->getPointerTo(AS);
1983 if (VectorType *VecTy = dyn_cast<VectorType>(C->getType()))
1984 ReqTy = VectorType::get(ReqTy, VecTy->getNumElements());
1986 if (OnlyIfReducedTy == ReqTy)
1989 // Look up the constant in the table first to ensure uniqueness
1990 std::vector<Constant*> ArgVec;
1991 ArgVec.reserve(1 + Idxs.size());
1992 ArgVec.push_back(C);
1993 for (unsigned i = 0, e = Idxs.size(); i != e; ++i) {
1994 assert(Idxs[i]->getType()->isVectorTy() == ReqTy->isVectorTy() &&
1995 "getelementptr index type missmatch");
1996 assert((!Idxs[i]->getType()->isVectorTy() ||
1997 ReqTy->getVectorNumElements() ==
1998 Idxs[i]->getType()->getVectorNumElements()) &&
1999 "getelementptr index type missmatch");
2000 ArgVec.push_back(cast<Constant>(Idxs[i]));
2002 const ConstantExprKeyType Key(Instruction::GetElementPtr, ArgVec, 0,
2003 InBounds ? GEPOperator::IsInBounds : 0, None,
2006 LLVMContextImpl *pImpl = C->getContext().pImpl;
2007 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2010 Constant *ConstantExpr::getICmp(unsigned short pred, Constant *LHS,
2011 Constant *RHS, bool OnlyIfReduced) {
2012 assert(LHS->getType() == RHS->getType());
2013 assert(pred >= ICmpInst::FIRST_ICMP_PREDICATE &&
2014 pred <= ICmpInst::LAST_ICMP_PREDICATE && "Invalid ICmp Predicate");
2016 if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
2017 return FC; // Fold a few common cases...
2022 // Look up the constant in the table first to ensure uniqueness
2023 Constant *ArgVec[] = { LHS, RHS };
2024 // Get the key type with both the opcode and predicate
2025 const ConstantExprKeyType Key(Instruction::ICmp, ArgVec, pred);
2027 Type *ResultTy = Type::getInt1Ty(LHS->getContext());
2028 if (VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
2029 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
2031 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
2032 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
2035 Constant *ConstantExpr::getFCmp(unsigned short pred, Constant *LHS,
2036 Constant *RHS, bool OnlyIfReduced) {
2037 assert(LHS->getType() == RHS->getType());
2038 assert(pred <= FCmpInst::LAST_FCMP_PREDICATE && "Invalid FCmp Predicate");
2040 if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
2041 return FC; // Fold a few common cases...
2046 // Look up the constant in the table first to ensure uniqueness
2047 Constant *ArgVec[] = { LHS, RHS };
2048 // Get the key type with both the opcode and predicate
2049 const ConstantExprKeyType Key(Instruction::FCmp, ArgVec, pred);
2051 Type *ResultTy = Type::getInt1Ty(LHS->getContext());
2052 if (VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
2053 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
2055 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
2056 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
2059 Constant *ConstantExpr::getExtractElement(Constant *Val, Constant *Idx,
2060 Type *OnlyIfReducedTy) {
2061 assert(Val->getType()->isVectorTy() &&
2062 "Tried to create extractelement operation on non-vector type!");
2063 assert(Idx->getType()->isIntegerTy() &&
2064 "Extractelement index must be an integer type!");
2066 if (Constant *FC = ConstantFoldExtractElementInstruction(Val, Idx))
2067 return FC; // Fold a few common cases.
2069 Type *ReqTy = Val->getType()->getVectorElementType();
2070 if (OnlyIfReducedTy == ReqTy)
2073 // Look up the constant in the table first to ensure uniqueness
2074 Constant *ArgVec[] = { Val, Idx };
2075 const ConstantExprKeyType Key(Instruction::ExtractElement, ArgVec);
2077 LLVMContextImpl *pImpl = Val->getContext().pImpl;
2078 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2081 Constant *ConstantExpr::getInsertElement(Constant *Val, Constant *Elt,
2082 Constant *Idx, Type *OnlyIfReducedTy) {
2083 assert(Val->getType()->isVectorTy() &&
2084 "Tried to create insertelement operation on non-vector type!");
2085 assert(Elt->getType() == Val->getType()->getVectorElementType() &&
2086 "Insertelement types must match!");
2087 assert(Idx->getType()->isIntegerTy() &&
2088 "Insertelement index must be i32 type!");
2090 if (Constant *FC = ConstantFoldInsertElementInstruction(Val, Elt, Idx))
2091 return FC; // Fold a few common cases.
2093 if (OnlyIfReducedTy == Val->getType())
2096 // Look up the constant in the table first to ensure uniqueness
2097 Constant *ArgVec[] = { Val, Elt, Idx };
2098 const ConstantExprKeyType Key(Instruction::InsertElement, ArgVec);
2100 LLVMContextImpl *pImpl = Val->getContext().pImpl;
2101 return pImpl->ExprConstants.getOrCreate(Val->getType(), Key);
2104 Constant *ConstantExpr::getShuffleVector(Constant *V1, Constant *V2,
2105 Constant *Mask, Type *OnlyIfReducedTy) {
2106 assert(ShuffleVectorInst::isValidOperands(V1, V2, Mask) &&
2107 "Invalid shuffle vector constant expr operands!");
2109 if (Constant *FC = ConstantFoldShuffleVectorInstruction(V1, V2, Mask))
2110 return FC; // Fold a few common cases.
2112 unsigned NElts = Mask->getType()->getVectorNumElements();
2113 Type *EltTy = V1->getType()->getVectorElementType();
2114 Type *ShufTy = VectorType::get(EltTy, NElts);
2116 if (OnlyIfReducedTy == ShufTy)
2119 // Look up the constant in the table first to ensure uniqueness
2120 Constant *ArgVec[] = { V1, V2, Mask };
2121 const ConstantExprKeyType Key(Instruction::ShuffleVector, ArgVec);
2123 LLVMContextImpl *pImpl = ShufTy->getContext().pImpl;
2124 return pImpl->ExprConstants.getOrCreate(ShufTy, Key);
2127 Constant *ConstantExpr::getInsertValue(Constant *Agg, Constant *Val,
2128 ArrayRef<unsigned> Idxs,
2129 Type *OnlyIfReducedTy) {
2130 assert(Agg->getType()->isFirstClassType() &&
2131 "Non-first-class type for constant insertvalue expression");
2133 assert(ExtractValueInst::getIndexedType(Agg->getType(),
2134 Idxs) == Val->getType() &&
2135 "insertvalue indices invalid!");
2136 Type *ReqTy = Val->getType();
2138 if (Constant *FC = ConstantFoldInsertValueInstruction(Agg, Val, Idxs))
2141 if (OnlyIfReducedTy == ReqTy)
2144 Constant *ArgVec[] = { Agg, Val };
2145 const ConstantExprKeyType Key(Instruction::InsertValue, ArgVec, 0, 0, Idxs);
2147 LLVMContextImpl *pImpl = Agg->getContext().pImpl;
2148 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2151 Constant *ConstantExpr::getExtractValue(Constant *Agg, ArrayRef<unsigned> Idxs,
2152 Type *OnlyIfReducedTy) {
2153 assert(Agg->getType()->isFirstClassType() &&
2154 "Tried to create extractelement operation on non-first-class type!");
2156 Type *ReqTy = ExtractValueInst::getIndexedType(Agg->getType(), Idxs);
2158 assert(ReqTy && "extractvalue indices invalid!");
2160 assert(Agg->getType()->isFirstClassType() &&
2161 "Non-first-class type for constant extractvalue expression");
2162 if (Constant *FC = ConstantFoldExtractValueInstruction(Agg, Idxs))
2165 if (OnlyIfReducedTy == ReqTy)
2168 Constant *ArgVec[] = { Agg };
2169 const ConstantExprKeyType Key(Instruction::ExtractValue, ArgVec, 0, 0, Idxs);
2171 LLVMContextImpl *pImpl = Agg->getContext().pImpl;
2172 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2175 Constant *ConstantExpr::getNeg(Constant *C, bool HasNUW, bool HasNSW) {
2176 assert(C->getType()->isIntOrIntVectorTy() &&
2177 "Cannot NEG a nonintegral value!");
2178 return getSub(ConstantFP::getZeroValueForNegation(C->getType()),
2182 Constant *ConstantExpr::getFNeg(Constant *C) {
2183 assert(C->getType()->isFPOrFPVectorTy() &&
2184 "Cannot FNEG a non-floating-point value!");
2185 return getFSub(ConstantFP::getZeroValueForNegation(C->getType()), C);
2188 Constant *ConstantExpr::getNot(Constant *C) {
2189 assert(C->getType()->isIntOrIntVectorTy() &&
2190 "Cannot NOT a nonintegral value!");
2191 return get(Instruction::Xor, C, Constant::getAllOnesValue(C->getType()));
2194 Constant *ConstantExpr::getAdd(Constant *C1, Constant *C2,
2195 bool HasNUW, bool HasNSW) {
2196 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2197 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2198 return get(Instruction::Add, C1, C2, Flags);
2201 Constant *ConstantExpr::getFAdd(Constant *C1, Constant *C2) {
2202 return get(Instruction::FAdd, C1, C2);
2205 Constant *ConstantExpr::getSub(Constant *C1, Constant *C2,
2206 bool HasNUW, bool HasNSW) {
2207 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2208 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2209 return get(Instruction::Sub, C1, C2, Flags);
2212 Constant *ConstantExpr::getFSub(Constant *C1, Constant *C2) {
2213 return get(Instruction::FSub, C1, C2);
2216 Constant *ConstantExpr::getMul(Constant *C1, Constant *C2,
2217 bool HasNUW, bool HasNSW) {
2218 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2219 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2220 return get(Instruction::Mul, C1, C2, Flags);
2223 Constant *ConstantExpr::getFMul(Constant *C1, Constant *C2) {
2224 return get(Instruction::FMul, C1, C2);
2227 Constant *ConstantExpr::getUDiv(Constant *C1, Constant *C2, bool isExact) {
2228 return get(Instruction::UDiv, C1, C2,
2229 isExact ? PossiblyExactOperator::IsExact : 0);
2232 Constant *ConstantExpr::getSDiv(Constant *C1, Constant *C2, bool isExact) {
2233 return get(Instruction::SDiv, C1, C2,
2234 isExact ? PossiblyExactOperator::IsExact : 0);
2237 Constant *ConstantExpr::getFDiv(Constant *C1, Constant *C2) {
2238 return get(Instruction::FDiv, C1, C2);
2241 Constant *ConstantExpr::getURem(Constant *C1, Constant *C2) {
2242 return get(Instruction::URem, C1, C2);
2245 Constant *ConstantExpr::getSRem(Constant *C1, Constant *C2) {
2246 return get(Instruction::SRem, C1, C2);
2249 Constant *ConstantExpr::getFRem(Constant *C1, Constant *C2) {
2250 return get(Instruction::FRem, C1, C2);
2253 Constant *ConstantExpr::getAnd(Constant *C1, Constant *C2) {
2254 return get(Instruction::And, C1, C2);
2257 Constant *ConstantExpr::getOr(Constant *C1, Constant *C2) {
2258 return get(Instruction::Or, C1, C2);
2261 Constant *ConstantExpr::getXor(Constant *C1, Constant *C2) {
2262 return get(Instruction::Xor, C1, C2);
2265 Constant *ConstantExpr::getShl(Constant *C1, Constant *C2,
2266 bool HasNUW, bool HasNSW) {
2267 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2268 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2269 return get(Instruction::Shl, C1, C2, Flags);
2272 Constant *ConstantExpr::getLShr(Constant *C1, Constant *C2, bool isExact) {
2273 return get(Instruction::LShr, C1, C2,
2274 isExact ? PossiblyExactOperator::IsExact : 0);
2277 Constant *ConstantExpr::getAShr(Constant *C1, Constant *C2, bool isExact) {
2278 return get(Instruction::AShr, C1, C2,
2279 isExact ? PossiblyExactOperator::IsExact : 0);
2282 /// getBinOpIdentity - Return the identity for the given binary operation,
2283 /// i.e. a constant C such that X op C = X and C op X = X for every X. It
2284 /// returns null if the operator doesn't have an identity.
2285 Constant *ConstantExpr::getBinOpIdentity(unsigned Opcode, Type *Ty) {
2288 // Doesn't have an identity.
2291 case Instruction::Add:
2292 case Instruction::Or:
2293 case Instruction::Xor:
2294 return Constant::getNullValue(Ty);
2296 case Instruction::Mul:
2297 return ConstantInt::get(Ty, 1);
2299 case Instruction::And:
2300 return Constant::getAllOnesValue(Ty);
2304 /// getBinOpAbsorber - Return the absorbing element for the given binary
2305 /// operation, i.e. a constant C such that X op C = C and C op X = C for
2306 /// every X. For example, this returns zero for integer multiplication.
2307 /// It returns null if the operator doesn't have an absorbing element.
2308 Constant *ConstantExpr::getBinOpAbsorber(unsigned Opcode, Type *Ty) {
2311 // Doesn't have an absorber.
2314 case Instruction::Or:
2315 return Constant::getAllOnesValue(Ty);
2317 case Instruction::And:
2318 case Instruction::Mul:
2319 return Constant::getNullValue(Ty);
2323 // destroyConstant - Remove the constant from the constant table...
2325 void ConstantExpr::destroyConstantImpl() {
2326 getType()->getContext().pImpl->ExprConstants.remove(this);
2329 const char *ConstantExpr::getOpcodeName() const {
2330 return Instruction::getOpcodeName(getOpcode());
2333 GetElementPtrConstantExpr::GetElementPtrConstantExpr(
2334 Type *SrcElementTy, Constant *C, ArrayRef<Constant *> IdxList, Type *DestTy)
2335 : ConstantExpr(DestTy, Instruction::GetElementPtr,
2336 OperandTraits<GetElementPtrConstantExpr>::op_end(this) -
2337 (IdxList.size() + 1),
2338 IdxList.size() + 1),
2339 SrcElementTy(SrcElementTy) {
2341 Use *OperandList = getOperandList();
2342 for (unsigned i = 0, E = IdxList.size(); i != E; ++i)
2343 OperandList[i+1] = IdxList[i];
2346 Type *GetElementPtrConstantExpr::getSourceElementType() const {
2347 return SrcElementTy;
2350 //===----------------------------------------------------------------------===//
2351 // ConstantData* implementations
2353 void ConstantDataArray::anchor() {}
2354 void ConstantDataVector::anchor() {}
2356 /// getElementType - Return the element type of the array/vector.
2357 Type *ConstantDataSequential::getElementType() const {
2358 return getType()->getElementType();
2361 StringRef ConstantDataSequential::getRawDataValues() const {
2362 return StringRef(DataElements, getNumElements()*getElementByteSize());
2365 /// isElementTypeCompatible - Return true if a ConstantDataSequential can be
2366 /// formed with a vector or array of the specified element type.
2367 /// ConstantDataArray only works with normal float and int types that are
2368 /// stored densely in memory, not with things like i42 or x86_f80.
2369 bool ConstantDataSequential::isElementTypeCompatible(Type *Ty) {
2370 if (Ty->isHalfTy() || Ty->isFloatTy() || Ty->isDoubleTy()) return true;
2371 if (auto *IT = dyn_cast<IntegerType>(Ty)) {
2372 switch (IT->getBitWidth()) {
2384 /// getNumElements - Return the number of elements in the array or vector.
2385 unsigned ConstantDataSequential::getNumElements() const {
2386 if (ArrayType *AT = dyn_cast<ArrayType>(getType()))
2387 return AT->getNumElements();
2388 return getType()->getVectorNumElements();
2392 /// getElementByteSize - Return the size in bytes of the elements in the data.
2393 uint64_t ConstantDataSequential::getElementByteSize() const {
2394 return getElementType()->getPrimitiveSizeInBits()/8;
2397 /// getElementPointer - Return the start of the specified element.
2398 const char *ConstantDataSequential::getElementPointer(unsigned Elt) const {
2399 assert(Elt < getNumElements() && "Invalid Elt");
2400 return DataElements+Elt*getElementByteSize();
2404 /// isAllZeros - return true if the array is empty or all zeros.
2405 static bool isAllZeros(StringRef Arr) {
2406 for (StringRef::iterator I = Arr.begin(), E = Arr.end(); I != E; ++I)
2412 /// getImpl - This is the underlying implementation of all of the
2413 /// ConstantDataSequential::get methods. They all thunk down to here, providing
2414 /// the correct element type. We take the bytes in as a StringRef because
2415 /// we *want* an underlying "char*" to avoid TBAA type punning violations.
2416 Constant *ConstantDataSequential::getImpl(StringRef Elements, Type *Ty) {
2417 assert(isElementTypeCompatible(Ty->getSequentialElementType()));
2418 // If the elements are all zero or there are no elements, return a CAZ, which
2419 // is more dense and canonical.
2420 if (isAllZeros(Elements))
2421 return ConstantAggregateZero::get(Ty);
2423 // Do a lookup to see if we have already formed one of these.
2426 .pImpl->CDSConstants.insert(std::make_pair(Elements, nullptr))
2429 // The bucket can point to a linked list of different CDS's that have the same
2430 // body but different types. For example, 0,0,0,1 could be a 4 element array
2431 // of i8, or a 1-element array of i32. They'll both end up in the same
2432 /// StringMap bucket, linked up by their Next pointers. Walk the list.
2433 ConstantDataSequential **Entry = &Slot.second;
2434 for (ConstantDataSequential *Node = *Entry; Node;
2435 Entry = &Node->Next, Node = *Entry)
2436 if (Node->getType() == Ty)
2439 // Okay, we didn't get a hit. Create a node of the right class, link it in,
2441 if (isa<ArrayType>(Ty))
2442 return *Entry = new ConstantDataArray(Ty, Slot.first().data());
2444 assert(isa<VectorType>(Ty));
2445 return *Entry = new ConstantDataVector(Ty, Slot.first().data());
2448 void ConstantDataSequential::destroyConstantImpl() {
2449 // Remove the constant from the StringMap.
2450 StringMap<ConstantDataSequential*> &CDSConstants =
2451 getType()->getContext().pImpl->CDSConstants;
2453 StringMap<ConstantDataSequential*>::iterator Slot =
2454 CDSConstants.find(getRawDataValues());
2456 assert(Slot != CDSConstants.end() && "CDS not found in uniquing table");
2458 ConstantDataSequential **Entry = &Slot->getValue();
2460 // Remove the entry from the hash table.
2461 if (!(*Entry)->Next) {
2462 // If there is only one value in the bucket (common case) it must be this
2463 // entry, and removing the entry should remove the bucket completely.
2464 assert((*Entry) == this && "Hash mismatch in ConstantDataSequential");
2465 getContext().pImpl->CDSConstants.erase(Slot);
2467 // Otherwise, there are multiple entries linked off the bucket, unlink the
2468 // node we care about but keep the bucket around.
2469 for (ConstantDataSequential *Node = *Entry; ;
2470 Entry = &Node->Next, Node = *Entry) {
2471 assert(Node && "Didn't find entry in its uniquing hash table!");
2472 // If we found our entry, unlink it from the list and we're done.
2474 *Entry = Node->Next;
2480 // If we were part of a list, make sure that we don't delete the list that is
2481 // still owned by the uniquing map.
2485 /// get() constructors - Return a constant with array 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 *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint8_t> Elts) {
2489 Type *Ty = ArrayType::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 *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint16_t> Elts){
2494 Type *Ty = ArrayType::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 *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint32_t> Elts){
2499 Type *Ty = ArrayType::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 *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint64_t> Elts){
2504 Type *Ty = ArrayType::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 *ConstantDataArray::get(LLVMContext &Context, ArrayRef<float> Elts) {
2509 Type *Ty = ArrayType::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 *ConstantDataArray::get(LLVMContext &Context, ArrayRef<double> Elts) {
2514 Type *Ty = ArrayType::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 array type with an element
2520 /// count and element type of float with 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 *ConstantDataArray::getFP(LLVMContext &Context,
2525 ArrayRef<uint16_t> Elts) {
2526 Type *Ty = ArrayType::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 *ConstantDataArray::getFP(LLVMContext &Context,
2531 ArrayRef<uint32_t> Elts) {
2532 Type *Ty = ArrayType::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 *ConstantDataArray::getFP(LLVMContext &Context,
2537 ArrayRef<uint64_t> Elts) {
2538 Type *Ty = ArrayType::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 /// getString - This method constructs a CDS and initializes it with a text
2544 /// string. The default behavior (AddNull==true) causes a null terminator to
2545 /// be placed at the end of the array (increasing the length of the string by
2546 /// one more than the StringRef would normally indicate. Pass AddNull=false
2547 /// to disable this behavior.
2548 Constant *ConstantDataArray::getString(LLVMContext &Context,
2549 StringRef Str, bool AddNull) {
2551 const uint8_t *Data = reinterpret_cast<const uint8_t *>(Str.data());
2552 return get(Context, makeArrayRef(const_cast<uint8_t *>(Data),
2556 SmallVector<uint8_t, 64> ElementVals;
2557 ElementVals.append(Str.begin(), Str.end());
2558 ElementVals.push_back(0);
2559 return get(Context, ElementVals);
2562 /// get() constructors - Return a constant with vector type with an element
2563 /// count and element type matching the ArrayRef passed in. Note that this
2564 /// can return a ConstantAggregateZero object.
2565 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint8_t> Elts){
2566 Type *Ty = VectorType::get(Type::getInt8Ty(Context), Elts.size());
2567 const char *Data = reinterpret_cast<const char *>(Elts.data());
2568 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*1), Ty);
2570 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint16_t> Elts){
2571 Type *Ty = VectorType::get(Type::getInt16Ty(Context), Elts.size());
2572 const char *Data = reinterpret_cast<const char *>(Elts.data());
2573 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*2), Ty);
2575 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint32_t> Elts){
2576 Type *Ty = VectorType::get(Type::getInt32Ty(Context), Elts.size());
2577 const char *Data = reinterpret_cast<const char *>(Elts.data());
2578 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2580 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint64_t> Elts){
2581 Type *Ty = VectorType::get(Type::getInt64Ty(Context), Elts.size());
2582 const char *Data = reinterpret_cast<const char *>(Elts.data());
2583 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*8), Ty);
2585 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<float> Elts) {
2586 Type *Ty = VectorType::get(Type::getFloatTy(Context), Elts.size());
2587 const char *Data = reinterpret_cast<const char *>(Elts.data());
2588 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2590 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<double> Elts) {
2591 Type *Ty = VectorType::get(Type::getDoubleTy(Context), Elts.size());
2592 const char *Data = reinterpret_cast<const char *>(Elts.data());
2593 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2596 /// getFP() constructors - Return a constant with vector type with an element
2597 /// count and element type of float with the precision matching the number of
2598 /// bits in the ArrayRef passed in. (i.e. half for 16bits, float for 32bits,
2599 /// double for 64bits) Note that this can return a ConstantAggregateZero
2601 Constant *ConstantDataVector::getFP(LLVMContext &Context,
2602 ArrayRef<uint16_t> Elts) {
2603 Type *Ty = VectorType::get(Type::getHalfTy(Context), Elts.size());
2604 const char *Data = reinterpret_cast<const char *>(Elts.data());
2605 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 2), Ty);
2607 Constant *ConstantDataVector::getFP(LLVMContext &Context,
2608 ArrayRef<uint32_t> Elts) {
2609 Type *Ty = VectorType::get(Type::getFloatTy(Context), Elts.size());
2610 const char *Data = reinterpret_cast<const char *>(Elts.data());
2611 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 4), Ty);
2613 Constant *ConstantDataVector::getFP(LLVMContext &Context,
2614 ArrayRef<uint64_t> Elts) {
2615 Type *Ty = VectorType::get(Type::getDoubleTy(Context), Elts.size());
2616 const char *Data = reinterpret_cast<const char *>(Elts.data());
2617 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2620 Constant *ConstantDataVector::getSplat(unsigned NumElts, Constant *V) {
2621 assert(isElementTypeCompatible(V->getType()) &&
2622 "Element type not compatible with ConstantData");
2623 if (ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
2624 if (CI->getType()->isIntegerTy(8)) {
2625 SmallVector<uint8_t, 16> Elts(NumElts, CI->getZExtValue());
2626 return get(V->getContext(), Elts);
2628 if (CI->getType()->isIntegerTy(16)) {
2629 SmallVector<uint16_t, 16> Elts(NumElts, CI->getZExtValue());
2630 return get(V->getContext(), Elts);
2632 if (CI->getType()->isIntegerTy(32)) {
2633 SmallVector<uint32_t, 16> Elts(NumElts, CI->getZExtValue());
2634 return get(V->getContext(), Elts);
2636 assert(CI->getType()->isIntegerTy(64) && "Unsupported ConstantData type");
2637 SmallVector<uint64_t, 16> Elts(NumElts, CI->getZExtValue());
2638 return get(V->getContext(), Elts);
2641 if (ConstantFP *CFP = dyn_cast<ConstantFP>(V)) {
2642 if (CFP->getType()->isHalfTy()) {
2643 SmallVector<uint16_t, 16> Elts(
2644 NumElts, CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
2645 return getFP(V->getContext(), Elts);
2647 if (CFP->getType()->isFloatTy()) {
2648 SmallVector<uint32_t, 16> Elts(
2649 NumElts, CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
2650 return getFP(V->getContext(), Elts);
2652 if (CFP->getType()->isDoubleTy()) {
2653 SmallVector<uint64_t, 16> Elts(
2654 NumElts, CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
2655 return getFP(V->getContext(), Elts);
2658 return ConstantVector::getSplat(NumElts, V);
2662 /// getElementAsInteger - If this is a sequential container of integers (of
2663 /// any size), return the specified element in the low bits of a uint64_t.
2664 uint64_t ConstantDataSequential::getElementAsInteger(unsigned Elt) const {
2665 assert(isa<IntegerType>(getElementType()) &&
2666 "Accessor can only be used when element is an integer");
2667 const char *EltPtr = getElementPointer(Elt);
2669 // The data is stored in host byte order, make sure to cast back to the right
2670 // type to load with the right endianness.
2671 switch (getElementType()->getIntegerBitWidth()) {
2672 default: llvm_unreachable("Invalid bitwidth for CDS");
2674 return *const_cast<uint8_t *>(reinterpret_cast<const uint8_t *>(EltPtr));
2676 return *const_cast<uint16_t *>(reinterpret_cast<const uint16_t *>(EltPtr));
2678 return *const_cast<uint32_t *>(reinterpret_cast<const uint32_t *>(EltPtr));
2680 return *const_cast<uint64_t *>(reinterpret_cast<const uint64_t *>(EltPtr));
2684 /// getElementAsAPFloat - If this is a sequential container of floating point
2685 /// type, return the specified element as an APFloat.
2686 APFloat ConstantDataSequential::getElementAsAPFloat(unsigned Elt) const {
2687 const char *EltPtr = getElementPointer(Elt);
2689 switch (getElementType()->getTypeID()) {
2691 llvm_unreachable("Accessor can only be used when element is float/double!");
2692 case Type::HalfTyID: {
2693 auto EltVal = *reinterpret_cast<const uint16_t *>(EltPtr);
2694 return APFloat(APFloat::IEEEhalf, APInt(16, EltVal));
2696 case Type::FloatTyID: {
2697 auto EltVal = *reinterpret_cast<const uint32_t *>(EltPtr);
2698 return APFloat(APFloat::IEEEsingle, APInt(32, EltVal));
2700 case Type::DoubleTyID: {
2701 auto EltVal = *reinterpret_cast<const uint64_t *>(EltPtr);
2702 return APFloat(APFloat::IEEEdouble, APInt(64, EltVal));
2707 /// getElementAsFloat - If this is an sequential container of floats, return
2708 /// the specified element as a float.
2709 float ConstantDataSequential::getElementAsFloat(unsigned Elt) const {
2710 assert(getElementType()->isFloatTy() &&
2711 "Accessor can only be used when element is a 'float'");
2712 const float *EltPtr = reinterpret_cast<const float *>(getElementPointer(Elt));
2713 return *const_cast<float *>(EltPtr);
2716 /// getElementAsDouble - If this is an sequential container of doubles, return
2717 /// the specified element as a float.
2718 double ConstantDataSequential::getElementAsDouble(unsigned Elt) const {
2719 assert(getElementType()->isDoubleTy() &&
2720 "Accessor can only be used when element is a 'float'");
2721 const double *EltPtr =
2722 reinterpret_cast<const double *>(getElementPointer(Elt));
2723 return *const_cast<double *>(EltPtr);
2726 /// getElementAsConstant - Return a Constant for a specified index's element.
2727 /// Note that this has to compute a new constant to return, so it isn't as
2728 /// efficient as getElementAsInteger/Float/Double.
2729 Constant *ConstantDataSequential::getElementAsConstant(unsigned Elt) const {
2730 if (getElementType()->isHalfTy() || getElementType()->isFloatTy() ||
2731 getElementType()->isDoubleTy())
2732 return ConstantFP::get(getContext(), getElementAsAPFloat(Elt));
2734 return ConstantInt::get(getElementType(), getElementAsInteger(Elt));
2737 /// isString - This method returns true if this is an array of i8.
2738 bool ConstantDataSequential::isString() const {
2739 return isa<ArrayType>(getType()) && getElementType()->isIntegerTy(8);
2742 /// isCString - This method returns true if the array "isString", ends with a
2743 /// nul byte, and does not contains any other nul bytes.
2744 bool ConstantDataSequential::isCString() const {
2748 StringRef Str = getAsString();
2750 // The last value must be nul.
2751 if (Str.back() != 0) return false;
2753 // Other elements must be non-nul.
2754 return Str.drop_back().find(0) == StringRef::npos;
2757 /// getSplatValue - If this is a splat constant, meaning that all of the
2758 /// elements have the same value, return that value. Otherwise return nullptr.
2759 Constant *ConstantDataVector::getSplatValue() const {
2760 const char *Base = getRawDataValues().data();
2762 // Compare elements 1+ to the 0'th element.
2763 unsigned EltSize = getElementByteSize();
2764 for (unsigned i = 1, e = getNumElements(); i != e; ++i)
2765 if (memcmp(Base, Base+i*EltSize, EltSize))
2768 // If they're all the same, return the 0th one as a representative.
2769 return getElementAsConstant(0);
2772 //===----------------------------------------------------------------------===//
2773 // handleOperandChange implementations
2775 /// Update this constant array to change uses of
2776 /// 'From' to be uses of 'To'. This must update the uniquing data structures
2779 /// Note that we intentionally replace all uses of From with To here. Consider
2780 /// a large array that uses 'From' 1000 times. By handling this case all here,
2781 /// ConstantArray::handleOperandChange is only invoked once, and that
2782 /// single invocation handles all 1000 uses. Handling them one at a time would
2783 /// work, but would be really slow because it would have to unique each updated
2786 void Constant::handleOperandChange(Value *From, Value *To, Use *U) {
2787 Value *Replacement = nullptr;
2788 switch (getValueID()) {
2790 llvm_unreachable("Not a constant!");
2791 #define HANDLE_CONSTANT(Name) \
2792 case Value::Name##Val: \
2793 Replacement = cast<Name>(this)->handleOperandChangeImpl(From, To, U); \
2795 #include "llvm/IR/Value.def"
2798 // If handleOperandChangeImpl returned nullptr, then it handled
2799 // replacing itself and we don't want to delete or replace anything else here.
2803 // I do need to replace this with an existing value.
2804 assert(Replacement != this && "I didn't contain From!");
2806 // Everyone using this now uses the replacement.
2807 replaceAllUsesWith(Replacement);
2809 // Delete the old constant!
2813 Value *ConstantInt::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
2814 llvm_unreachable("Unsupported class for handleOperandChange()!");
2817 Value *ConstantFP::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
2818 llvm_unreachable("Unsupported class for handleOperandChange()!");
2821 Value *ConstantTokenNone::handleOperandChangeImpl(Value *From, Value *To,
2823 llvm_unreachable("Unsupported class for handleOperandChange()!");
2826 Value *UndefValue::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
2827 llvm_unreachable("Unsupported class for handleOperandChange()!");
2830 Value *ConstantPointerNull::handleOperandChangeImpl(Value *From, Value *To,
2832 llvm_unreachable("Unsupported class for handleOperandChange()!");
2835 Value *ConstantAggregateZero::handleOperandChangeImpl(Value *From, Value *To,
2837 llvm_unreachable("Unsupported class for handleOperandChange()!");
2840 Value *ConstantDataSequential::handleOperandChangeImpl(Value *From, Value *To,
2842 llvm_unreachable("Unsupported class for handleOperandChange()!");
2845 Value *ConstantArray::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
2846 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2847 Constant *ToC = cast<Constant>(To);
2849 SmallVector<Constant*, 8> Values;
2850 Values.reserve(getNumOperands()); // Build replacement array.
2852 // Fill values with the modified operands of the constant array. Also,
2853 // compute whether this turns into an all-zeros array.
2854 unsigned NumUpdated = 0;
2856 // Keep track of whether all the values in the array are "ToC".
2857 bool AllSame = true;
2858 Use *OperandList = getOperandList();
2859 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2860 Constant *Val = cast<Constant>(O->get());
2865 Values.push_back(Val);
2866 AllSame &= Val == ToC;
2869 if (AllSame && ToC->isNullValue())
2870 return ConstantAggregateZero::get(getType());
2872 if (AllSame && isa<UndefValue>(ToC))
2873 return UndefValue::get(getType());
2875 // Check for any other type of constant-folding.
2876 if (Constant *C = getImpl(getType(), Values))
2879 // Update to the new value.
2880 return getContext().pImpl->ArrayConstants.replaceOperandsInPlace(
2881 Values, this, From, ToC, NumUpdated, U - OperandList);
2884 Value *ConstantStruct::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
2885 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2886 Constant *ToC = cast<Constant>(To);
2888 Use *OperandList = getOperandList();
2889 unsigned OperandToUpdate = U-OperandList;
2890 assert(getOperand(OperandToUpdate) == From && "ReplaceAllUsesWith broken!");
2892 SmallVector<Constant*, 8> Values;
2893 Values.reserve(getNumOperands()); // Build replacement struct.
2895 // Fill values with the modified operands of the constant struct. Also,
2896 // compute whether this turns into an all-zeros struct.
2897 bool isAllZeros = false;
2898 bool isAllUndef = false;
2899 if (ToC->isNullValue()) {
2901 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2902 Constant *Val = cast<Constant>(O->get());
2903 Values.push_back(Val);
2904 if (isAllZeros) isAllZeros = Val->isNullValue();
2906 } else if (isa<UndefValue>(ToC)) {
2908 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2909 Constant *Val = cast<Constant>(O->get());
2910 Values.push_back(Val);
2911 if (isAllUndef) isAllUndef = isa<UndefValue>(Val);
2914 for (Use *O = OperandList, *E = OperandList + getNumOperands(); O != E; ++O)
2915 Values.push_back(cast<Constant>(O->get()));
2917 Values[OperandToUpdate] = ToC;
2920 return ConstantAggregateZero::get(getType());
2923 return UndefValue::get(getType());
2925 // Update to the new value.
2926 return getContext().pImpl->StructConstants.replaceOperandsInPlace(
2927 Values, this, From, ToC);
2930 Value *ConstantVector::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
2931 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2932 Constant *ToC = cast<Constant>(To);
2934 SmallVector<Constant*, 8> Values;
2935 Values.reserve(getNumOperands()); // Build replacement array...
2936 unsigned NumUpdated = 0;
2937 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
2938 Constant *Val = getOperand(i);
2943 Values.push_back(Val);
2946 if (Constant *C = getImpl(Values))
2949 // Update to the new value.
2950 Use *OperandList = getOperandList();
2951 return getContext().pImpl->VectorConstants.replaceOperandsInPlace(
2952 Values, this, From, ToC, NumUpdated, U - OperandList);
2955 Value *ConstantExpr::handleOperandChangeImpl(Value *From, Value *ToV, Use *U) {
2956 assert(isa<Constant>(ToV) && "Cannot make Constant refer to non-constant!");
2957 Constant *To = cast<Constant>(ToV);
2959 SmallVector<Constant*, 8> NewOps;
2960 unsigned NumUpdated = 0;
2961 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
2962 Constant *Op = getOperand(i);
2967 NewOps.push_back(Op);
2969 assert(NumUpdated && "I didn't contain From!");
2971 if (Constant *C = getWithOperands(NewOps, getType(), true))
2974 // Update to the new value.
2975 Use *OperandList = getOperandList();
2976 return getContext().pImpl->ExprConstants.replaceOperandsInPlace(
2977 NewOps, this, From, To, NumUpdated, U - OperandList);
2980 Instruction *ConstantExpr::getAsInstruction() {
2981 SmallVector<Value *, 4> ValueOperands(op_begin(), op_end());
2982 ArrayRef<Value*> Ops(ValueOperands);
2984 switch (getOpcode()) {
2985 case Instruction::Trunc:
2986 case Instruction::ZExt:
2987 case Instruction::SExt:
2988 case Instruction::FPTrunc:
2989 case Instruction::FPExt:
2990 case Instruction::UIToFP:
2991 case Instruction::SIToFP:
2992 case Instruction::FPToUI:
2993 case Instruction::FPToSI:
2994 case Instruction::PtrToInt:
2995 case Instruction::IntToPtr:
2996 case Instruction::BitCast:
2997 case Instruction::AddrSpaceCast:
2998 return CastInst::Create((Instruction::CastOps)getOpcode(),
3000 case Instruction::Select:
3001 return SelectInst::Create(Ops[0], Ops[1], Ops[2]);
3002 case Instruction::InsertElement:
3003 return InsertElementInst::Create(Ops[0], Ops[1], Ops[2]);
3004 case Instruction::ExtractElement:
3005 return ExtractElementInst::Create(Ops[0], Ops[1]);
3006 case Instruction::InsertValue:
3007 return InsertValueInst::Create(Ops[0], Ops[1], getIndices());
3008 case Instruction::ExtractValue:
3009 return ExtractValueInst::Create(Ops[0], getIndices());
3010 case Instruction::ShuffleVector:
3011 return new ShuffleVectorInst(Ops[0], Ops[1], Ops[2]);
3013 case Instruction::GetElementPtr: {
3014 const auto *GO = cast<GEPOperator>(this);
3015 if (GO->isInBounds())
3016 return GetElementPtrInst::CreateInBounds(GO->getSourceElementType(),
3017 Ops[0], Ops.slice(1));
3018 return GetElementPtrInst::Create(GO->getSourceElementType(), Ops[0],
3021 case Instruction::ICmp:
3022 case Instruction::FCmp:
3023 return CmpInst::Create((Instruction::OtherOps)getOpcode(),
3024 getPredicate(), Ops[0], Ops[1]);
3027 assert(getNumOperands() == 2 && "Must be binary operator?");
3028 BinaryOperator *BO =
3029 BinaryOperator::Create((Instruction::BinaryOps)getOpcode(),
3031 if (isa<OverflowingBinaryOperator>(BO)) {
3032 BO->setHasNoUnsignedWrap(SubclassOptionalData &
3033 OverflowingBinaryOperator::NoUnsignedWrap);
3034 BO->setHasNoSignedWrap(SubclassOptionalData &
3035 OverflowingBinaryOperator::NoSignedWrap);
3037 if (isa<PossiblyExactOperator>(BO))
3038 BO->setIsExact(SubclassOptionalData & PossiblyExactOperator::IsExact);