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()->isFloatTy())
903 return getFPSequenceIfElementsMatch<SequenceTy, uint32_t>(V);
904 else if (CFP->getType()->isDoubleTy())
905 return getFPSequenceIfElementsMatch<SequenceTy, uint64_t>(V);
911 ConstantArray::ConstantArray(ArrayType *T, ArrayRef<Constant *> V)
912 : Constant(T, ConstantArrayVal,
913 OperandTraits<ConstantArray>::op_end(this) - V.size(),
915 assert(V.size() == T->getNumElements() &&
916 "Invalid initializer vector for constant array");
917 for (unsigned i = 0, e = V.size(); i != e; ++i)
918 assert(V[i]->getType() == T->getElementType() &&
919 "Initializer for array element doesn't match array element type!");
920 std::copy(V.begin(), V.end(), op_begin());
923 Constant *ConstantArray::get(ArrayType *Ty, ArrayRef<Constant*> V) {
924 if (Constant *C = getImpl(Ty, V))
926 return Ty->getContext().pImpl->ArrayConstants.getOrCreate(Ty, V);
929 Constant *ConstantArray::getImpl(ArrayType *Ty, ArrayRef<Constant*> V) {
930 // Empty arrays are canonicalized to ConstantAggregateZero.
932 return ConstantAggregateZero::get(Ty);
934 for (unsigned i = 0, e = V.size(); i != e; ++i) {
935 assert(V[i]->getType() == Ty->getElementType() &&
936 "Wrong type in array element initializer");
939 // If this is an all-zero array, return a ConstantAggregateZero object. If
940 // all undef, return an UndefValue, if "all simple", then return a
941 // ConstantDataArray.
943 if (isa<UndefValue>(C) && rangeOnlyContains(V.begin(), V.end(), C))
944 return UndefValue::get(Ty);
946 if (C->isNullValue() && rangeOnlyContains(V.begin(), V.end(), C))
947 return ConstantAggregateZero::get(Ty);
949 // Check to see if all of the elements are ConstantFP or ConstantInt and if
950 // the element type is compatible with ConstantDataVector. If so, use it.
951 if (ConstantDataSequential::isElementTypeCompatible(C->getType()))
952 return getSequenceIfElementsMatch<ConstantDataArray>(C, V);
954 // Otherwise, we really do want to create a ConstantArray.
958 /// getTypeForElements - Return an anonymous struct type to use for a constant
959 /// with the specified set of elements. The list must not be empty.
960 StructType *ConstantStruct::getTypeForElements(LLVMContext &Context,
961 ArrayRef<Constant*> V,
963 unsigned VecSize = V.size();
964 SmallVector<Type*, 16> EltTypes(VecSize);
965 for (unsigned i = 0; i != VecSize; ++i)
966 EltTypes[i] = V[i]->getType();
968 return StructType::get(Context, EltTypes, Packed);
972 StructType *ConstantStruct::getTypeForElements(ArrayRef<Constant*> V,
975 "ConstantStruct::getTypeForElements cannot be called on empty list");
976 return getTypeForElements(V[0]->getContext(), V, Packed);
980 ConstantStruct::ConstantStruct(StructType *T, ArrayRef<Constant *> V)
981 : Constant(T, ConstantStructVal,
982 OperandTraits<ConstantStruct>::op_end(this) - V.size(),
984 assert(V.size() == T->getNumElements() &&
985 "Invalid initializer vector for constant structure");
986 for (unsigned i = 0, e = V.size(); i != e; ++i)
987 assert((T->isOpaque() || V[i]->getType() == T->getElementType(i)) &&
988 "Initializer for struct element doesn't match struct element type!");
989 std::copy(V.begin(), V.end(), op_begin());
992 // ConstantStruct accessors.
993 Constant *ConstantStruct::get(StructType *ST, ArrayRef<Constant*> V) {
994 assert((ST->isOpaque() || ST->getNumElements() == V.size()) &&
995 "Incorrect # elements specified to ConstantStruct::get");
997 // Create a ConstantAggregateZero value if all elements are zeros.
999 bool isUndef = false;
1002 isUndef = isa<UndefValue>(V[0]);
1003 isZero = V[0]->isNullValue();
1004 if (isUndef || isZero) {
1005 for (unsigned i = 0, e = V.size(); i != e; ++i) {
1006 if (!V[i]->isNullValue())
1008 if (!isa<UndefValue>(V[i]))
1014 return ConstantAggregateZero::get(ST);
1016 return UndefValue::get(ST);
1018 return ST->getContext().pImpl->StructConstants.getOrCreate(ST, V);
1021 Constant *ConstantStruct::get(StructType *T, ...) {
1023 SmallVector<Constant*, 8> Values;
1025 while (Constant *Val = va_arg(ap, llvm::Constant*))
1026 Values.push_back(Val);
1028 return get(T, Values);
1031 ConstantVector::ConstantVector(VectorType *T, ArrayRef<Constant *> V)
1032 : Constant(T, ConstantVectorVal,
1033 OperandTraits<ConstantVector>::op_end(this) - V.size(),
1035 for (size_t i = 0, e = V.size(); i != e; i++)
1036 assert(V[i]->getType() == T->getElementType() &&
1037 "Initializer for vector element doesn't match vector element type!");
1038 std::copy(V.begin(), V.end(), op_begin());
1041 // ConstantVector accessors.
1042 Constant *ConstantVector::get(ArrayRef<Constant*> V) {
1043 if (Constant *C = getImpl(V))
1045 VectorType *Ty = VectorType::get(V.front()->getType(), V.size());
1046 return Ty->getContext().pImpl->VectorConstants.getOrCreate(Ty, V);
1049 Constant *ConstantVector::getImpl(ArrayRef<Constant*> V) {
1050 assert(!V.empty() && "Vectors can't be empty");
1051 VectorType *T = VectorType::get(V.front()->getType(), V.size());
1053 // If this is an all-undef or all-zero vector, return a
1054 // ConstantAggregateZero or UndefValue.
1056 bool isZero = C->isNullValue();
1057 bool isUndef = isa<UndefValue>(C);
1059 if (isZero || isUndef) {
1060 for (unsigned i = 1, e = V.size(); i != e; ++i)
1062 isZero = isUndef = false;
1068 return ConstantAggregateZero::get(T);
1070 return UndefValue::get(T);
1072 // Check to see if all of the elements are ConstantFP or ConstantInt and if
1073 // the element type is compatible with ConstantDataVector. If so, use it.
1074 if (ConstantDataSequential::isElementTypeCompatible(C->getType()))
1075 return getSequenceIfElementsMatch<ConstantDataVector>(C, V);
1077 // Otherwise, the element type isn't compatible with ConstantDataVector, or
1078 // the operand list constants a ConstantExpr or something else strange.
1082 Constant *ConstantVector::getSplat(unsigned NumElts, Constant *V) {
1083 // If this splat is compatible with ConstantDataVector, use it instead of
1085 if ((isa<ConstantFP>(V) || isa<ConstantInt>(V)) &&
1086 ConstantDataSequential::isElementTypeCompatible(V->getType()))
1087 return ConstantDataVector::getSplat(NumElts, V);
1089 SmallVector<Constant*, 32> Elts(NumElts, V);
1093 ConstantTokenNone *ConstantTokenNone::get(LLVMContext &Context) {
1094 LLVMContextImpl *pImpl = Context.pImpl;
1095 if (!pImpl->TheNoneToken)
1096 pImpl->TheNoneToken.reset(new ConstantTokenNone(Context));
1097 return pImpl->TheNoneToken.get();
1100 /// Remove the constant from the constant table.
1101 void ConstantTokenNone::destroyConstantImpl() {
1102 llvm_unreachable("You can't ConstantTokenNone->destroyConstantImpl()!");
1105 // Utility function for determining if a ConstantExpr is a CastOp or not. This
1106 // can't be inline because we don't want to #include Instruction.h into
1108 bool ConstantExpr::isCast() const {
1109 return Instruction::isCast(getOpcode());
1112 bool ConstantExpr::isCompare() const {
1113 return getOpcode() == Instruction::ICmp || getOpcode() == Instruction::FCmp;
1116 bool ConstantExpr::isGEPWithNoNotionalOverIndexing() const {
1117 if (getOpcode() != Instruction::GetElementPtr) return false;
1119 gep_type_iterator GEPI = gep_type_begin(this), E = gep_type_end(this);
1120 User::const_op_iterator OI = std::next(this->op_begin());
1122 // Skip the first index, as it has no static limit.
1126 // The remaining indices must be compile-time known integers within the
1127 // bounds of the corresponding notional static array types.
1128 for (; GEPI != E; ++GEPI, ++OI) {
1129 ConstantInt *CI = dyn_cast<ConstantInt>(*OI);
1130 if (!CI) return false;
1131 if (ArrayType *ATy = dyn_cast<ArrayType>(*GEPI))
1132 if (CI->getValue().getActiveBits() > 64 ||
1133 CI->getZExtValue() >= ATy->getNumElements())
1137 // All the indices checked out.
1141 bool ConstantExpr::hasIndices() const {
1142 return getOpcode() == Instruction::ExtractValue ||
1143 getOpcode() == Instruction::InsertValue;
1146 ArrayRef<unsigned> ConstantExpr::getIndices() const {
1147 if (const ExtractValueConstantExpr *EVCE =
1148 dyn_cast<ExtractValueConstantExpr>(this))
1149 return EVCE->Indices;
1151 return cast<InsertValueConstantExpr>(this)->Indices;
1154 unsigned ConstantExpr::getPredicate() const {
1155 assert(isCompare());
1156 return ((const CompareConstantExpr*)this)->predicate;
1159 /// getWithOperandReplaced - Return a constant expression identical to this
1160 /// one, but with the specified operand set to the specified value.
1162 ConstantExpr::getWithOperandReplaced(unsigned OpNo, Constant *Op) const {
1163 assert(Op->getType() == getOperand(OpNo)->getType() &&
1164 "Replacing operand with value of different type!");
1165 if (getOperand(OpNo) == Op)
1166 return const_cast<ConstantExpr*>(this);
1168 SmallVector<Constant*, 8> NewOps;
1169 for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
1170 NewOps.push_back(i == OpNo ? Op : getOperand(i));
1172 return getWithOperands(NewOps);
1175 /// getWithOperands - This returns the current constant expression with the
1176 /// operands replaced with the specified values. The specified array must
1177 /// have the same number of operands as our current one.
1178 Constant *ConstantExpr::getWithOperands(ArrayRef<Constant *> Ops, Type *Ty,
1179 bool OnlyIfReduced, Type *SrcTy) const {
1180 assert(Ops.size() == getNumOperands() && "Operand count mismatch!");
1182 // If no operands changed return self.
1183 if (Ty == getType() && std::equal(Ops.begin(), Ops.end(), op_begin()))
1184 return const_cast<ConstantExpr*>(this);
1186 Type *OnlyIfReducedTy = OnlyIfReduced ? Ty : nullptr;
1187 switch (getOpcode()) {
1188 case Instruction::Trunc:
1189 case Instruction::ZExt:
1190 case Instruction::SExt:
1191 case Instruction::FPTrunc:
1192 case Instruction::FPExt:
1193 case Instruction::UIToFP:
1194 case Instruction::SIToFP:
1195 case Instruction::FPToUI:
1196 case Instruction::FPToSI:
1197 case Instruction::PtrToInt:
1198 case Instruction::IntToPtr:
1199 case Instruction::BitCast:
1200 case Instruction::AddrSpaceCast:
1201 return ConstantExpr::getCast(getOpcode(), Ops[0], Ty, OnlyIfReduced);
1202 case Instruction::Select:
1203 return ConstantExpr::getSelect(Ops[0], Ops[1], Ops[2], OnlyIfReducedTy);
1204 case Instruction::InsertElement:
1205 return ConstantExpr::getInsertElement(Ops[0], Ops[1], Ops[2],
1207 case Instruction::ExtractElement:
1208 return ConstantExpr::getExtractElement(Ops[0], Ops[1], OnlyIfReducedTy);
1209 case Instruction::InsertValue:
1210 return ConstantExpr::getInsertValue(Ops[0], Ops[1], getIndices(),
1212 case Instruction::ExtractValue:
1213 return ConstantExpr::getExtractValue(Ops[0], getIndices(), OnlyIfReducedTy);
1214 case Instruction::ShuffleVector:
1215 return ConstantExpr::getShuffleVector(Ops[0], Ops[1], Ops[2],
1217 case Instruction::GetElementPtr: {
1218 auto *GEPO = cast<GEPOperator>(this);
1219 assert(SrcTy || (Ops[0]->getType() == getOperand(0)->getType()));
1220 return ConstantExpr::getGetElementPtr(
1221 SrcTy ? SrcTy : GEPO->getSourceElementType(), Ops[0], Ops.slice(1),
1222 GEPO->isInBounds(), OnlyIfReducedTy);
1224 case Instruction::ICmp:
1225 case Instruction::FCmp:
1226 return ConstantExpr::getCompare(getPredicate(), Ops[0], Ops[1],
1229 assert(getNumOperands() == 2 && "Must be binary operator?");
1230 return ConstantExpr::get(getOpcode(), Ops[0], Ops[1], SubclassOptionalData,
1236 //===----------------------------------------------------------------------===//
1237 // isValueValidForType implementations
1239 bool ConstantInt::isValueValidForType(Type *Ty, uint64_t Val) {
1240 unsigned NumBits = Ty->getIntegerBitWidth(); // assert okay
1241 if (Ty->isIntegerTy(1))
1242 return Val == 0 || Val == 1;
1244 return true; // always true, has to fit in largest type
1245 uint64_t Max = (1ll << NumBits) - 1;
1249 bool ConstantInt::isValueValidForType(Type *Ty, int64_t Val) {
1250 unsigned NumBits = Ty->getIntegerBitWidth();
1251 if (Ty->isIntegerTy(1))
1252 return Val == 0 || Val == 1 || Val == -1;
1254 return true; // always true, has to fit in largest type
1255 int64_t Min = -(1ll << (NumBits-1));
1256 int64_t Max = (1ll << (NumBits-1)) - 1;
1257 return (Val >= Min && Val <= Max);
1260 bool ConstantFP::isValueValidForType(Type *Ty, const APFloat& Val) {
1261 // convert modifies in place, so make a copy.
1262 APFloat Val2 = APFloat(Val);
1264 switch (Ty->getTypeID()) {
1266 return false; // These can't be represented as floating point!
1268 // FIXME rounding mode needs to be more flexible
1269 case Type::HalfTyID: {
1270 if (&Val2.getSemantics() == &APFloat::IEEEhalf)
1272 Val2.convert(APFloat::IEEEhalf, APFloat::rmNearestTiesToEven, &losesInfo);
1275 case Type::FloatTyID: {
1276 if (&Val2.getSemantics() == &APFloat::IEEEsingle)
1278 Val2.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, &losesInfo);
1281 case Type::DoubleTyID: {
1282 if (&Val2.getSemantics() == &APFloat::IEEEhalf ||
1283 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1284 &Val2.getSemantics() == &APFloat::IEEEdouble)
1286 Val2.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &losesInfo);
1289 case Type::X86_FP80TyID:
1290 return &Val2.getSemantics() == &APFloat::IEEEhalf ||
1291 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1292 &Val2.getSemantics() == &APFloat::IEEEdouble ||
1293 &Val2.getSemantics() == &APFloat::x87DoubleExtended;
1294 case Type::FP128TyID:
1295 return &Val2.getSemantics() == &APFloat::IEEEhalf ||
1296 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1297 &Val2.getSemantics() == &APFloat::IEEEdouble ||
1298 &Val2.getSemantics() == &APFloat::IEEEquad;
1299 case Type::PPC_FP128TyID:
1300 return &Val2.getSemantics() == &APFloat::IEEEhalf ||
1301 &Val2.getSemantics() == &APFloat::IEEEsingle ||
1302 &Val2.getSemantics() == &APFloat::IEEEdouble ||
1303 &Val2.getSemantics() == &APFloat::PPCDoubleDouble;
1308 //===----------------------------------------------------------------------===//
1309 // Factory Function Implementation
1311 ConstantAggregateZero *ConstantAggregateZero::get(Type *Ty) {
1312 assert((Ty->isStructTy() || Ty->isArrayTy() || Ty->isVectorTy()) &&
1313 "Cannot create an aggregate zero of non-aggregate type!");
1315 ConstantAggregateZero *&Entry = Ty->getContext().pImpl->CAZConstants[Ty];
1317 Entry = new ConstantAggregateZero(Ty);
1322 /// destroyConstant - Remove the constant from the constant table.
1324 void ConstantAggregateZero::destroyConstantImpl() {
1325 getContext().pImpl->CAZConstants.erase(getType());
1328 /// destroyConstant - Remove the constant from the constant table...
1330 void ConstantArray::destroyConstantImpl() {
1331 getType()->getContext().pImpl->ArrayConstants.remove(this);
1335 //---- ConstantStruct::get() implementation...
1338 // destroyConstant - Remove the constant from the constant table...
1340 void ConstantStruct::destroyConstantImpl() {
1341 getType()->getContext().pImpl->StructConstants.remove(this);
1344 // destroyConstant - Remove the constant from the constant table...
1346 void ConstantVector::destroyConstantImpl() {
1347 getType()->getContext().pImpl->VectorConstants.remove(this);
1350 /// getSplatValue - If this is a splat vector constant, meaning that all of
1351 /// the elements have the same value, return that value. Otherwise return 0.
1352 Constant *Constant::getSplatValue() const {
1353 assert(this->getType()->isVectorTy() && "Only valid for vectors!");
1354 if (isa<ConstantAggregateZero>(this))
1355 return getNullValue(this->getType()->getVectorElementType());
1356 if (const ConstantDataVector *CV = dyn_cast<ConstantDataVector>(this))
1357 return CV->getSplatValue();
1358 if (const ConstantVector *CV = dyn_cast<ConstantVector>(this))
1359 return CV->getSplatValue();
1363 /// getSplatValue - If this is a splat constant, where all of the
1364 /// elements have the same value, return that value. Otherwise return null.
1365 Constant *ConstantVector::getSplatValue() const {
1366 // Check out first element.
1367 Constant *Elt = getOperand(0);
1368 // Then make sure all remaining elements point to the same value.
1369 for (unsigned I = 1, E = getNumOperands(); I < E; ++I)
1370 if (getOperand(I) != Elt)
1375 /// If C is a constant integer then return its value, otherwise C must be a
1376 /// vector of constant integers, all equal, and the common value is returned.
1377 const APInt &Constant::getUniqueInteger() const {
1378 if (const ConstantInt *CI = dyn_cast<ConstantInt>(this))
1379 return CI->getValue();
1380 assert(this->getSplatValue() && "Doesn't contain a unique integer!");
1381 const Constant *C = this->getAggregateElement(0U);
1382 assert(C && isa<ConstantInt>(C) && "Not a vector of numbers!");
1383 return cast<ConstantInt>(C)->getValue();
1386 //---- ConstantPointerNull::get() implementation.
1389 ConstantPointerNull *ConstantPointerNull::get(PointerType *Ty) {
1390 ConstantPointerNull *&Entry = Ty->getContext().pImpl->CPNConstants[Ty];
1392 Entry = new ConstantPointerNull(Ty);
1397 // destroyConstant - Remove the constant from the constant table...
1399 void ConstantPointerNull::destroyConstantImpl() {
1400 getContext().pImpl->CPNConstants.erase(getType());
1404 //---- UndefValue::get() implementation.
1407 UndefValue *UndefValue::get(Type *Ty) {
1408 UndefValue *&Entry = Ty->getContext().pImpl->UVConstants[Ty];
1410 Entry = new UndefValue(Ty);
1415 // destroyConstant - Remove the constant from the constant table.
1417 void UndefValue::destroyConstantImpl() {
1418 // Free the constant and any dangling references to it.
1419 getContext().pImpl->UVConstants.erase(getType());
1422 //---- BlockAddress::get() implementation.
1425 BlockAddress *BlockAddress::get(BasicBlock *BB) {
1426 assert(BB->getParent() && "Block must have a parent");
1427 return get(BB->getParent(), BB);
1430 BlockAddress *BlockAddress::get(Function *F, BasicBlock *BB) {
1432 F->getContext().pImpl->BlockAddresses[std::make_pair(F, BB)];
1434 BA = new BlockAddress(F, BB);
1436 assert(BA->getFunction() == F && "Basic block moved between functions");
1440 BlockAddress::BlockAddress(Function *F, BasicBlock *BB)
1441 : Constant(Type::getInt8PtrTy(F->getContext()), Value::BlockAddressVal,
1445 BB->AdjustBlockAddressRefCount(1);
1448 BlockAddress *BlockAddress::lookup(const BasicBlock *BB) {
1449 if (!BB->hasAddressTaken())
1452 const Function *F = BB->getParent();
1453 assert(F && "Block must have a parent");
1455 F->getContext().pImpl->BlockAddresses.lookup(std::make_pair(F, BB));
1456 assert(BA && "Refcount and block address map disagree!");
1460 // destroyConstant - Remove the constant from the constant table.
1462 void BlockAddress::destroyConstantImpl() {
1463 getFunction()->getType()->getContext().pImpl
1464 ->BlockAddresses.erase(std::make_pair(getFunction(), getBasicBlock()));
1465 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1468 Value *BlockAddress::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
1469 // This could be replacing either the Basic Block or the Function. In either
1470 // case, we have to remove the map entry.
1471 Function *NewF = getFunction();
1472 BasicBlock *NewBB = getBasicBlock();
1475 NewF = cast<Function>(To->stripPointerCasts());
1477 NewBB = cast<BasicBlock>(To);
1479 // See if the 'new' entry already exists, if not, just update this in place
1480 // and return early.
1481 BlockAddress *&NewBA =
1482 getContext().pImpl->BlockAddresses[std::make_pair(NewF, NewBB)];
1486 getBasicBlock()->AdjustBlockAddressRefCount(-1);
1488 // Remove the old entry, this can't cause the map to rehash (just a
1489 // tombstone will get added).
1490 getContext().pImpl->BlockAddresses.erase(std::make_pair(getFunction(),
1493 setOperand(0, NewF);
1494 setOperand(1, NewBB);
1495 getBasicBlock()->AdjustBlockAddressRefCount(1);
1497 // If we just want to keep the existing value, then return null.
1498 // Callers know that this means we shouldn't delete this value.
1502 //---- ConstantExpr::get() implementations.
1505 /// This is a utility function to handle folding of casts and lookup of the
1506 /// cast in the ExprConstants map. It is used by the various get* methods below.
1507 static Constant *getFoldedCast(Instruction::CastOps opc, Constant *C, Type *Ty,
1508 bool OnlyIfReduced = false) {
1509 assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
1510 // Fold a few common cases
1511 if (Constant *FC = ConstantFoldCastInstruction(opc, C, Ty))
1517 LLVMContextImpl *pImpl = Ty->getContext().pImpl;
1519 // Look up the constant in the table first to ensure uniqueness.
1520 ConstantExprKeyType Key(opc, C);
1522 return pImpl->ExprConstants.getOrCreate(Ty, Key);
1525 Constant *ConstantExpr::getCast(unsigned oc, Constant *C, Type *Ty,
1526 bool OnlyIfReduced) {
1527 Instruction::CastOps opc = Instruction::CastOps(oc);
1528 assert(Instruction::isCast(opc) && "opcode out of range");
1529 assert(C && Ty && "Null arguments to getCast");
1530 assert(CastInst::castIsValid(opc, C, Ty) && "Invalid constantexpr cast!");
1534 llvm_unreachable("Invalid cast opcode");
1535 case Instruction::Trunc:
1536 return getTrunc(C, Ty, OnlyIfReduced);
1537 case Instruction::ZExt:
1538 return getZExt(C, Ty, OnlyIfReduced);
1539 case Instruction::SExt:
1540 return getSExt(C, Ty, OnlyIfReduced);
1541 case Instruction::FPTrunc:
1542 return getFPTrunc(C, Ty, OnlyIfReduced);
1543 case Instruction::FPExt:
1544 return getFPExtend(C, Ty, OnlyIfReduced);
1545 case Instruction::UIToFP:
1546 return getUIToFP(C, Ty, OnlyIfReduced);
1547 case Instruction::SIToFP:
1548 return getSIToFP(C, Ty, OnlyIfReduced);
1549 case Instruction::FPToUI:
1550 return getFPToUI(C, Ty, OnlyIfReduced);
1551 case Instruction::FPToSI:
1552 return getFPToSI(C, Ty, OnlyIfReduced);
1553 case Instruction::PtrToInt:
1554 return getPtrToInt(C, Ty, OnlyIfReduced);
1555 case Instruction::IntToPtr:
1556 return getIntToPtr(C, Ty, OnlyIfReduced);
1557 case Instruction::BitCast:
1558 return getBitCast(C, Ty, OnlyIfReduced);
1559 case Instruction::AddrSpaceCast:
1560 return getAddrSpaceCast(C, Ty, OnlyIfReduced);
1564 Constant *ConstantExpr::getZExtOrBitCast(Constant *C, Type *Ty) {
1565 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1566 return getBitCast(C, Ty);
1567 return getZExt(C, Ty);
1570 Constant *ConstantExpr::getSExtOrBitCast(Constant *C, Type *Ty) {
1571 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1572 return getBitCast(C, Ty);
1573 return getSExt(C, Ty);
1576 Constant *ConstantExpr::getTruncOrBitCast(Constant *C, Type *Ty) {
1577 if (C->getType()->getScalarSizeInBits() == Ty->getScalarSizeInBits())
1578 return getBitCast(C, Ty);
1579 return getTrunc(C, Ty);
1582 Constant *ConstantExpr::getPointerCast(Constant *S, Type *Ty) {
1583 assert(S->getType()->isPtrOrPtrVectorTy() && "Invalid cast");
1584 assert((Ty->isIntOrIntVectorTy() || Ty->isPtrOrPtrVectorTy()) &&
1587 if (Ty->isIntOrIntVectorTy())
1588 return getPtrToInt(S, Ty);
1590 unsigned SrcAS = S->getType()->getPointerAddressSpace();
1591 if (Ty->isPtrOrPtrVectorTy() && SrcAS != Ty->getPointerAddressSpace())
1592 return getAddrSpaceCast(S, Ty);
1594 return getBitCast(S, Ty);
1597 Constant *ConstantExpr::getPointerBitCastOrAddrSpaceCast(Constant *S,
1599 assert(S->getType()->isPtrOrPtrVectorTy() && "Invalid cast");
1600 assert(Ty->isPtrOrPtrVectorTy() && "Invalid cast");
1602 if (S->getType()->getPointerAddressSpace() != Ty->getPointerAddressSpace())
1603 return getAddrSpaceCast(S, Ty);
1605 return getBitCast(S, Ty);
1608 Constant *ConstantExpr::getIntegerCast(Constant *C, Type *Ty,
1610 assert(C->getType()->isIntOrIntVectorTy() &&
1611 Ty->isIntOrIntVectorTy() && "Invalid cast");
1612 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1613 unsigned DstBits = Ty->getScalarSizeInBits();
1614 Instruction::CastOps opcode =
1615 (SrcBits == DstBits ? Instruction::BitCast :
1616 (SrcBits > DstBits ? Instruction::Trunc :
1617 (isSigned ? Instruction::SExt : Instruction::ZExt)));
1618 return getCast(opcode, C, Ty);
1621 Constant *ConstantExpr::getFPCast(Constant *C, Type *Ty) {
1622 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1624 unsigned SrcBits = C->getType()->getScalarSizeInBits();
1625 unsigned DstBits = Ty->getScalarSizeInBits();
1626 if (SrcBits == DstBits)
1627 return C; // Avoid a useless cast
1628 Instruction::CastOps opcode =
1629 (SrcBits > DstBits ? Instruction::FPTrunc : Instruction::FPExt);
1630 return getCast(opcode, C, Ty);
1633 Constant *ConstantExpr::getTrunc(Constant *C, Type *Ty, bool OnlyIfReduced) {
1635 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1636 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1638 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1639 assert(C->getType()->isIntOrIntVectorTy() && "Trunc operand must be integer");
1640 assert(Ty->isIntOrIntVectorTy() && "Trunc produces only integral");
1641 assert(C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1642 "SrcTy must be larger than DestTy for Trunc!");
1644 return getFoldedCast(Instruction::Trunc, C, Ty, OnlyIfReduced);
1647 Constant *ConstantExpr::getSExt(Constant *C, Type *Ty, bool OnlyIfReduced) {
1649 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1650 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1652 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1653 assert(C->getType()->isIntOrIntVectorTy() && "SExt operand must be integral");
1654 assert(Ty->isIntOrIntVectorTy() && "SExt produces only integer");
1655 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1656 "SrcTy must be smaller than DestTy for SExt!");
1658 return getFoldedCast(Instruction::SExt, C, Ty, OnlyIfReduced);
1661 Constant *ConstantExpr::getZExt(Constant *C, Type *Ty, bool OnlyIfReduced) {
1663 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1664 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1666 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1667 assert(C->getType()->isIntOrIntVectorTy() && "ZEXt operand must be integral");
1668 assert(Ty->isIntOrIntVectorTy() && "ZExt produces only integer");
1669 assert(C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1670 "SrcTy must be smaller than DestTy for ZExt!");
1672 return getFoldedCast(Instruction::ZExt, C, Ty, OnlyIfReduced);
1675 Constant *ConstantExpr::getFPTrunc(Constant *C, Type *Ty, bool OnlyIfReduced) {
1677 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1678 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1680 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1681 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1682 C->getType()->getScalarSizeInBits() > Ty->getScalarSizeInBits()&&
1683 "This is an illegal floating point truncation!");
1684 return getFoldedCast(Instruction::FPTrunc, C, Ty, OnlyIfReduced);
1687 Constant *ConstantExpr::getFPExtend(Constant *C, Type *Ty, bool OnlyIfReduced) {
1689 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1690 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1692 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1693 assert(C->getType()->isFPOrFPVectorTy() && Ty->isFPOrFPVectorTy() &&
1694 C->getType()->getScalarSizeInBits() < Ty->getScalarSizeInBits()&&
1695 "This is an illegal floating point extension!");
1696 return getFoldedCast(Instruction::FPExt, C, Ty, OnlyIfReduced);
1699 Constant *ConstantExpr::getUIToFP(Constant *C, Type *Ty, bool OnlyIfReduced) {
1701 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1702 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1704 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1705 assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1706 "This is an illegal uint to floating point cast!");
1707 return getFoldedCast(Instruction::UIToFP, C, Ty, OnlyIfReduced);
1710 Constant *ConstantExpr::getSIToFP(Constant *C, Type *Ty, bool OnlyIfReduced) {
1712 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1713 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1715 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1716 assert(C->getType()->isIntOrIntVectorTy() && Ty->isFPOrFPVectorTy() &&
1717 "This is an illegal sint to floating point cast!");
1718 return getFoldedCast(Instruction::SIToFP, C, Ty, OnlyIfReduced);
1721 Constant *ConstantExpr::getFPToUI(Constant *C, Type *Ty, bool OnlyIfReduced) {
1723 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1724 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1726 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1727 assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1728 "This is an illegal floating point to uint cast!");
1729 return getFoldedCast(Instruction::FPToUI, C, Ty, OnlyIfReduced);
1732 Constant *ConstantExpr::getFPToSI(Constant *C, Type *Ty, bool OnlyIfReduced) {
1734 bool fromVec = C->getType()->getTypeID() == Type::VectorTyID;
1735 bool toVec = Ty->getTypeID() == Type::VectorTyID;
1737 assert((fromVec == toVec) && "Cannot convert from scalar to/from vector");
1738 assert(C->getType()->isFPOrFPVectorTy() && Ty->isIntOrIntVectorTy() &&
1739 "This is an illegal floating point to sint cast!");
1740 return getFoldedCast(Instruction::FPToSI, C, Ty, OnlyIfReduced);
1743 Constant *ConstantExpr::getPtrToInt(Constant *C, Type *DstTy,
1744 bool OnlyIfReduced) {
1745 assert(C->getType()->getScalarType()->isPointerTy() &&
1746 "PtrToInt source must be pointer or pointer vector");
1747 assert(DstTy->getScalarType()->isIntegerTy() &&
1748 "PtrToInt destination must be integer or integer vector");
1749 assert(isa<VectorType>(C->getType()) == isa<VectorType>(DstTy));
1750 if (isa<VectorType>(C->getType()))
1751 assert(C->getType()->getVectorNumElements()==DstTy->getVectorNumElements()&&
1752 "Invalid cast between a different number of vector elements");
1753 return getFoldedCast(Instruction::PtrToInt, C, DstTy, OnlyIfReduced);
1756 Constant *ConstantExpr::getIntToPtr(Constant *C, Type *DstTy,
1757 bool OnlyIfReduced) {
1758 assert(C->getType()->getScalarType()->isIntegerTy() &&
1759 "IntToPtr source must be integer or integer vector");
1760 assert(DstTy->getScalarType()->isPointerTy() &&
1761 "IntToPtr destination must be a pointer or pointer vector");
1762 assert(isa<VectorType>(C->getType()) == isa<VectorType>(DstTy));
1763 if (isa<VectorType>(C->getType()))
1764 assert(C->getType()->getVectorNumElements()==DstTy->getVectorNumElements()&&
1765 "Invalid cast between a different number of vector elements");
1766 return getFoldedCast(Instruction::IntToPtr, C, DstTy, OnlyIfReduced);
1769 Constant *ConstantExpr::getBitCast(Constant *C, Type *DstTy,
1770 bool OnlyIfReduced) {
1771 assert(CastInst::castIsValid(Instruction::BitCast, C, DstTy) &&
1772 "Invalid constantexpr bitcast!");
1774 // It is common to ask for a bitcast of a value to its own type, handle this
1776 if (C->getType() == DstTy) return C;
1778 return getFoldedCast(Instruction::BitCast, C, DstTy, OnlyIfReduced);
1781 Constant *ConstantExpr::getAddrSpaceCast(Constant *C, Type *DstTy,
1782 bool OnlyIfReduced) {
1783 assert(CastInst::castIsValid(Instruction::AddrSpaceCast, C, DstTy) &&
1784 "Invalid constantexpr addrspacecast!");
1786 // Canonicalize addrspacecasts between different pointer types by first
1787 // bitcasting the pointer type and then converting the address space.
1788 PointerType *SrcScalarTy = cast<PointerType>(C->getType()->getScalarType());
1789 PointerType *DstScalarTy = cast<PointerType>(DstTy->getScalarType());
1790 Type *DstElemTy = DstScalarTy->getElementType();
1791 if (SrcScalarTy->getElementType() != DstElemTy) {
1792 Type *MidTy = PointerType::get(DstElemTy, SrcScalarTy->getAddressSpace());
1793 if (VectorType *VT = dyn_cast<VectorType>(DstTy)) {
1794 // Handle vectors of pointers.
1795 MidTy = VectorType::get(MidTy, VT->getNumElements());
1797 C = getBitCast(C, MidTy);
1799 return getFoldedCast(Instruction::AddrSpaceCast, C, DstTy, OnlyIfReduced);
1802 Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2,
1803 unsigned Flags, Type *OnlyIfReducedTy) {
1804 // Check the operands for consistency first.
1805 assert(Opcode >= Instruction::BinaryOpsBegin &&
1806 Opcode < Instruction::BinaryOpsEnd &&
1807 "Invalid opcode in binary constant expression");
1808 assert(C1->getType() == C2->getType() &&
1809 "Operand types in binary constant expression should match");
1813 case Instruction::Add:
1814 case Instruction::Sub:
1815 case Instruction::Mul:
1816 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1817 assert(C1->getType()->isIntOrIntVectorTy() &&
1818 "Tried to create an integer operation on a non-integer type!");
1820 case Instruction::FAdd:
1821 case Instruction::FSub:
1822 case Instruction::FMul:
1823 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1824 assert(C1->getType()->isFPOrFPVectorTy() &&
1825 "Tried to create a floating-point operation on a "
1826 "non-floating-point type!");
1828 case Instruction::UDiv:
1829 case Instruction::SDiv:
1830 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1831 assert(C1->getType()->isIntOrIntVectorTy() &&
1832 "Tried to create an arithmetic operation on a non-arithmetic type!");
1834 case Instruction::FDiv:
1835 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1836 assert(C1->getType()->isFPOrFPVectorTy() &&
1837 "Tried to create an arithmetic operation on a non-arithmetic type!");
1839 case Instruction::URem:
1840 case Instruction::SRem:
1841 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1842 assert(C1->getType()->isIntOrIntVectorTy() &&
1843 "Tried to create an arithmetic operation on a non-arithmetic type!");
1845 case Instruction::FRem:
1846 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1847 assert(C1->getType()->isFPOrFPVectorTy() &&
1848 "Tried to create an arithmetic operation on a non-arithmetic type!");
1850 case Instruction::And:
1851 case Instruction::Or:
1852 case Instruction::Xor:
1853 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1854 assert(C1->getType()->isIntOrIntVectorTy() &&
1855 "Tried to create a logical operation on a non-integral type!");
1857 case Instruction::Shl:
1858 case Instruction::LShr:
1859 case Instruction::AShr:
1860 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1861 assert(C1->getType()->isIntOrIntVectorTy() &&
1862 "Tried to create a shift operation on a non-integer type!");
1869 if (Constant *FC = ConstantFoldBinaryInstruction(Opcode, C1, C2))
1870 return FC; // Fold a few common cases.
1872 if (OnlyIfReducedTy == C1->getType())
1875 Constant *ArgVec[] = { C1, C2 };
1876 ConstantExprKeyType Key(Opcode, ArgVec, 0, Flags);
1878 LLVMContextImpl *pImpl = C1->getContext().pImpl;
1879 return pImpl->ExprConstants.getOrCreate(C1->getType(), Key);
1882 Constant *ConstantExpr::getSizeOf(Type* Ty) {
1883 // sizeof is implemented as: (i64) gep (Ty*)null, 1
1884 // Note that a non-inbounds gep is used, as null isn't within any object.
1885 Constant *GEPIdx = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1886 Constant *GEP = getGetElementPtr(
1887 Ty, Constant::getNullValue(PointerType::getUnqual(Ty)), GEPIdx);
1888 return getPtrToInt(GEP,
1889 Type::getInt64Ty(Ty->getContext()));
1892 Constant *ConstantExpr::getAlignOf(Type* Ty) {
1893 // alignof is implemented as: (i64) gep ({i1,Ty}*)null, 0, 1
1894 // Note that a non-inbounds gep is used, as null isn't within any object.
1896 StructType::get(Type::getInt1Ty(Ty->getContext()), Ty, nullptr);
1897 Constant *NullPtr = Constant::getNullValue(AligningTy->getPointerTo(0));
1898 Constant *Zero = ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0);
1899 Constant *One = ConstantInt::get(Type::getInt32Ty(Ty->getContext()), 1);
1900 Constant *Indices[2] = { Zero, One };
1901 Constant *GEP = getGetElementPtr(AligningTy, NullPtr, Indices);
1902 return getPtrToInt(GEP,
1903 Type::getInt64Ty(Ty->getContext()));
1906 Constant *ConstantExpr::getOffsetOf(StructType* STy, unsigned FieldNo) {
1907 return getOffsetOf(STy, ConstantInt::get(Type::getInt32Ty(STy->getContext()),
1911 Constant *ConstantExpr::getOffsetOf(Type* Ty, Constant *FieldNo) {
1912 // offsetof is implemented as: (i64) gep (Ty*)null, 0, FieldNo
1913 // Note that a non-inbounds gep is used, as null isn't within any object.
1914 Constant *GEPIdx[] = {
1915 ConstantInt::get(Type::getInt64Ty(Ty->getContext()), 0),
1918 Constant *GEP = getGetElementPtr(
1919 Ty, Constant::getNullValue(PointerType::getUnqual(Ty)), GEPIdx);
1920 return getPtrToInt(GEP,
1921 Type::getInt64Ty(Ty->getContext()));
1924 Constant *ConstantExpr::getCompare(unsigned short Predicate, Constant *C1,
1925 Constant *C2, bool OnlyIfReduced) {
1926 assert(C1->getType() == C2->getType() && "Op types should be identical!");
1928 switch (Predicate) {
1929 default: llvm_unreachable("Invalid CmpInst predicate");
1930 case CmpInst::FCMP_FALSE: case CmpInst::FCMP_OEQ: case CmpInst::FCMP_OGT:
1931 case CmpInst::FCMP_OGE: case CmpInst::FCMP_OLT: case CmpInst::FCMP_OLE:
1932 case CmpInst::FCMP_ONE: case CmpInst::FCMP_ORD: case CmpInst::FCMP_UNO:
1933 case CmpInst::FCMP_UEQ: case CmpInst::FCMP_UGT: case CmpInst::FCMP_UGE:
1934 case CmpInst::FCMP_ULT: case CmpInst::FCMP_ULE: case CmpInst::FCMP_UNE:
1935 case CmpInst::FCMP_TRUE:
1936 return getFCmp(Predicate, C1, C2, OnlyIfReduced);
1938 case CmpInst::ICMP_EQ: case CmpInst::ICMP_NE: case CmpInst::ICMP_UGT:
1939 case CmpInst::ICMP_UGE: case CmpInst::ICMP_ULT: case CmpInst::ICMP_ULE:
1940 case CmpInst::ICMP_SGT: case CmpInst::ICMP_SGE: case CmpInst::ICMP_SLT:
1941 case CmpInst::ICMP_SLE:
1942 return getICmp(Predicate, C1, C2, OnlyIfReduced);
1946 Constant *ConstantExpr::getSelect(Constant *C, Constant *V1, Constant *V2,
1947 Type *OnlyIfReducedTy) {
1948 assert(!SelectInst::areInvalidOperands(C, V1, V2)&&"Invalid select operands");
1950 if (Constant *SC = ConstantFoldSelectInstruction(C, V1, V2))
1951 return SC; // Fold common cases
1953 if (OnlyIfReducedTy == V1->getType())
1956 Constant *ArgVec[] = { C, V1, V2 };
1957 ConstantExprKeyType Key(Instruction::Select, ArgVec);
1959 LLVMContextImpl *pImpl = C->getContext().pImpl;
1960 return pImpl->ExprConstants.getOrCreate(V1->getType(), Key);
1963 Constant *ConstantExpr::getGetElementPtr(Type *Ty, Constant *C,
1964 ArrayRef<Value *> Idxs, bool InBounds,
1965 Type *OnlyIfReducedTy) {
1967 Ty = cast<PointerType>(C->getType()->getScalarType())->getElementType();
1971 cast<PointerType>(C->getType()->getScalarType())->getContainedType(0u));
1973 if (Constant *FC = ConstantFoldGetElementPtr(Ty, C, InBounds, Idxs))
1974 return FC; // Fold a few common cases.
1976 // Get the result type of the getelementptr!
1977 Type *DestTy = GetElementPtrInst::getIndexedType(Ty, Idxs);
1978 assert(DestTy && "GEP indices invalid!");
1979 unsigned AS = C->getType()->getPointerAddressSpace();
1980 Type *ReqTy = DestTy->getPointerTo(AS);
1981 if (VectorType *VecTy = dyn_cast<VectorType>(C->getType()))
1982 ReqTy = VectorType::get(ReqTy, VecTy->getNumElements());
1984 if (OnlyIfReducedTy == ReqTy)
1987 // Look up the constant in the table first to ensure uniqueness
1988 std::vector<Constant*> ArgVec;
1989 ArgVec.reserve(1 + Idxs.size());
1990 ArgVec.push_back(C);
1991 for (unsigned i = 0, e = Idxs.size(); i != e; ++i) {
1992 assert(Idxs[i]->getType()->isVectorTy() == ReqTy->isVectorTy() &&
1993 "getelementptr index type missmatch");
1994 assert((!Idxs[i]->getType()->isVectorTy() ||
1995 ReqTy->getVectorNumElements() ==
1996 Idxs[i]->getType()->getVectorNumElements()) &&
1997 "getelementptr index type missmatch");
1998 ArgVec.push_back(cast<Constant>(Idxs[i]));
2000 const ConstantExprKeyType Key(Instruction::GetElementPtr, ArgVec, 0,
2001 InBounds ? GEPOperator::IsInBounds : 0, None,
2004 LLVMContextImpl *pImpl = C->getContext().pImpl;
2005 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2008 Constant *ConstantExpr::getICmp(unsigned short pred, Constant *LHS,
2009 Constant *RHS, bool OnlyIfReduced) {
2010 assert(LHS->getType() == RHS->getType());
2011 assert(pred >= ICmpInst::FIRST_ICMP_PREDICATE &&
2012 pred <= ICmpInst::LAST_ICMP_PREDICATE && "Invalid ICmp Predicate");
2014 if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
2015 return FC; // Fold a few common cases...
2020 // Look up the constant in the table first to ensure uniqueness
2021 Constant *ArgVec[] = { LHS, RHS };
2022 // Get the key type with both the opcode and predicate
2023 const ConstantExprKeyType Key(Instruction::ICmp, ArgVec, pred);
2025 Type *ResultTy = Type::getInt1Ty(LHS->getContext());
2026 if (VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
2027 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
2029 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
2030 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
2033 Constant *ConstantExpr::getFCmp(unsigned short pred, Constant *LHS,
2034 Constant *RHS, bool OnlyIfReduced) {
2035 assert(LHS->getType() == RHS->getType());
2036 assert(pred <= FCmpInst::LAST_FCMP_PREDICATE && "Invalid FCmp Predicate");
2038 if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
2039 return FC; // Fold a few common cases...
2044 // Look up the constant in the table first to ensure uniqueness
2045 Constant *ArgVec[] = { LHS, RHS };
2046 // Get the key type with both the opcode and predicate
2047 const ConstantExprKeyType Key(Instruction::FCmp, ArgVec, pred);
2049 Type *ResultTy = Type::getInt1Ty(LHS->getContext());
2050 if (VectorType *VT = dyn_cast<VectorType>(LHS->getType()))
2051 ResultTy = VectorType::get(ResultTy, VT->getNumElements());
2053 LLVMContextImpl *pImpl = LHS->getType()->getContext().pImpl;
2054 return pImpl->ExprConstants.getOrCreate(ResultTy, Key);
2057 Constant *ConstantExpr::getExtractElement(Constant *Val, Constant *Idx,
2058 Type *OnlyIfReducedTy) {
2059 assert(Val->getType()->isVectorTy() &&
2060 "Tried to create extractelement operation on non-vector type!");
2061 assert(Idx->getType()->isIntegerTy() &&
2062 "Extractelement index must be an integer type!");
2064 if (Constant *FC = ConstantFoldExtractElementInstruction(Val, Idx))
2065 return FC; // Fold a few common cases.
2067 Type *ReqTy = Val->getType()->getVectorElementType();
2068 if (OnlyIfReducedTy == ReqTy)
2071 // Look up the constant in the table first to ensure uniqueness
2072 Constant *ArgVec[] = { Val, Idx };
2073 const ConstantExprKeyType Key(Instruction::ExtractElement, ArgVec);
2075 LLVMContextImpl *pImpl = Val->getContext().pImpl;
2076 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2079 Constant *ConstantExpr::getInsertElement(Constant *Val, Constant *Elt,
2080 Constant *Idx, Type *OnlyIfReducedTy) {
2081 assert(Val->getType()->isVectorTy() &&
2082 "Tried to create insertelement operation on non-vector type!");
2083 assert(Elt->getType() == Val->getType()->getVectorElementType() &&
2084 "Insertelement types must match!");
2085 assert(Idx->getType()->isIntegerTy() &&
2086 "Insertelement index must be i32 type!");
2088 if (Constant *FC = ConstantFoldInsertElementInstruction(Val, Elt, Idx))
2089 return FC; // Fold a few common cases.
2091 if (OnlyIfReducedTy == Val->getType())
2094 // Look up the constant in the table first to ensure uniqueness
2095 Constant *ArgVec[] = { Val, Elt, Idx };
2096 const ConstantExprKeyType Key(Instruction::InsertElement, ArgVec);
2098 LLVMContextImpl *pImpl = Val->getContext().pImpl;
2099 return pImpl->ExprConstants.getOrCreate(Val->getType(), Key);
2102 Constant *ConstantExpr::getShuffleVector(Constant *V1, Constant *V2,
2103 Constant *Mask, Type *OnlyIfReducedTy) {
2104 assert(ShuffleVectorInst::isValidOperands(V1, V2, Mask) &&
2105 "Invalid shuffle vector constant expr operands!");
2107 if (Constant *FC = ConstantFoldShuffleVectorInstruction(V1, V2, Mask))
2108 return FC; // Fold a few common cases.
2110 unsigned NElts = Mask->getType()->getVectorNumElements();
2111 Type *EltTy = V1->getType()->getVectorElementType();
2112 Type *ShufTy = VectorType::get(EltTy, NElts);
2114 if (OnlyIfReducedTy == ShufTy)
2117 // Look up the constant in the table first to ensure uniqueness
2118 Constant *ArgVec[] = { V1, V2, Mask };
2119 const ConstantExprKeyType Key(Instruction::ShuffleVector, ArgVec);
2121 LLVMContextImpl *pImpl = ShufTy->getContext().pImpl;
2122 return pImpl->ExprConstants.getOrCreate(ShufTy, Key);
2125 Constant *ConstantExpr::getInsertValue(Constant *Agg, Constant *Val,
2126 ArrayRef<unsigned> Idxs,
2127 Type *OnlyIfReducedTy) {
2128 assert(Agg->getType()->isFirstClassType() &&
2129 "Non-first-class type for constant insertvalue expression");
2131 assert(ExtractValueInst::getIndexedType(Agg->getType(),
2132 Idxs) == Val->getType() &&
2133 "insertvalue indices invalid!");
2134 Type *ReqTy = Val->getType();
2136 if (Constant *FC = ConstantFoldInsertValueInstruction(Agg, Val, Idxs))
2139 if (OnlyIfReducedTy == ReqTy)
2142 Constant *ArgVec[] = { Agg, Val };
2143 const ConstantExprKeyType Key(Instruction::InsertValue, ArgVec, 0, 0, Idxs);
2145 LLVMContextImpl *pImpl = Agg->getContext().pImpl;
2146 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2149 Constant *ConstantExpr::getExtractValue(Constant *Agg, ArrayRef<unsigned> Idxs,
2150 Type *OnlyIfReducedTy) {
2151 assert(Agg->getType()->isFirstClassType() &&
2152 "Tried to create extractelement operation on non-first-class type!");
2154 Type *ReqTy = ExtractValueInst::getIndexedType(Agg->getType(), Idxs);
2156 assert(ReqTy && "extractvalue indices invalid!");
2158 assert(Agg->getType()->isFirstClassType() &&
2159 "Non-first-class type for constant extractvalue expression");
2160 if (Constant *FC = ConstantFoldExtractValueInstruction(Agg, Idxs))
2163 if (OnlyIfReducedTy == ReqTy)
2166 Constant *ArgVec[] = { Agg };
2167 const ConstantExprKeyType Key(Instruction::ExtractValue, ArgVec, 0, 0, Idxs);
2169 LLVMContextImpl *pImpl = Agg->getContext().pImpl;
2170 return pImpl->ExprConstants.getOrCreate(ReqTy, Key);
2173 Constant *ConstantExpr::getNeg(Constant *C, bool HasNUW, bool HasNSW) {
2174 assert(C->getType()->isIntOrIntVectorTy() &&
2175 "Cannot NEG a nonintegral value!");
2176 return getSub(ConstantFP::getZeroValueForNegation(C->getType()),
2180 Constant *ConstantExpr::getFNeg(Constant *C) {
2181 assert(C->getType()->isFPOrFPVectorTy() &&
2182 "Cannot FNEG a non-floating-point value!");
2183 return getFSub(ConstantFP::getZeroValueForNegation(C->getType()), C);
2186 Constant *ConstantExpr::getNot(Constant *C) {
2187 assert(C->getType()->isIntOrIntVectorTy() &&
2188 "Cannot NOT a nonintegral value!");
2189 return get(Instruction::Xor, C, Constant::getAllOnesValue(C->getType()));
2192 Constant *ConstantExpr::getAdd(Constant *C1, Constant *C2,
2193 bool HasNUW, bool HasNSW) {
2194 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2195 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2196 return get(Instruction::Add, C1, C2, Flags);
2199 Constant *ConstantExpr::getFAdd(Constant *C1, Constant *C2) {
2200 return get(Instruction::FAdd, C1, C2);
2203 Constant *ConstantExpr::getSub(Constant *C1, Constant *C2,
2204 bool HasNUW, bool HasNSW) {
2205 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2206 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2207 return get(Instruction::Sub, C1, C2, Flags);
2210 Constant *ConstantExpr::getFSub(Constant *C1, Constant *C2) {
2211 return get(Instruction::FSub, C1, C2);
2214 Constant *ConstantExpr::getMul(Constant *C1, Constant *C2,
2215 bool HasNUW, bool HasNSW) {
2216 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2217 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2218 return get(Instruction::Mul, C1, C2, Flags);
2221 Constant *ConstantExpr::getFMul(Constant *C1, Constant *C2) {
2222 return get(Instruction::FMul, C1, C2);
2225 Constant *ConstantExpr::getUDiv(Constant *C1, Constant *C2, bool isExact) {
2226 return get(Instruction::UDiv, C1, C2,
2227 isExact ? PossiblyExactOperator::IsExact : 0);
2230 Constant *ConstantExpr::getSDiv(Constant *C1, Constant *C2, bool isExact) {
2231 return get(Instruction::SDiv, C1, C2,
2232 isExact ? PossiblyExactOperator::IsExact : 0);
2235 Constant *ConstantExpr::getFDiv(Constant *C1, Constant *C2) {
2236 return get(Instruction::FDiv, C1, C2);
2239 Constant *ConstantExpr::getURem(Constant *C1, Constant *C2) {
2240 return get(Instruction::URem, C1, C2);
2243 Constant *ConstantExpr::getSRem(Constant *C1, Constant *C2) {
2244 return get(Instruction::SRem, C1, C2);
2247 Constant *ConstantExpr::getFRem(Constant *C1, Constant *C2) {
2248 return get(Instruction::FRem, C1, C2);
2251 Constant *ConstantExpr::getAnd(Constant *C1, Constant *C2) {
2252 return get(Instruction::And, C1, C2);
2255 Constant *ConstantExpr::getOr(Constant *C1, Constant *C2) {
2256 return get(Instruction::Or, C1, C2);
2259 Constant *ConstantExpr::getXor(Constant *C1, Constant *C2) {
2260 return get(Instruction::Xor, C1, C2);
2263 Constant *ConstantExpr::getShl(Constant *C1, Constant *C2,
2264 bool HasNUW, bool HasNSW) {
2265 unsigned Flags = (HasNUW ? OverflowingBinaryOperator::NoUnsignedWrap : 0) |
2266 (HasNSW ? OverflowingBinaryOperator::NoSignedWrap : 0);
2267 return get(Instruction::Shl, C1, C2, Flags);
2270 Constant *ConstantExpr::getLShr(Constant *C1, Constant *C2, bool isExact) {
2271 return get(Instruction::LShr, C1, C2,
2272 isExact ? PossiblyExactOperator::IsExact : 0);
2275 Constant *ConstantExpr::getAShr(Constant *C1, Constant *C2, bool isExact) {
2276 return get(Instruction::AShr, C1, C2,
2277 isExact ? PossiblyExactOperator::IsExact : 0);
2280 /// getBinOpIdentity - Return the identity for the given binary operation,
2281 /// i.e. a constant C such that X op C = X and C op X = X for every X. It
2282 /// returns null if the operator doesn't have an identity.
2283 Constant *ConstantExpr::getBinOpIdentity(unsigned Opcode, Type *Ty) {
2286 // Doesn't have an identity.
2289 case Instruction::Add:
2290 case Instruction::Or:
2291 case Instruction::Xor:
2292 return Constant::getNullValue(Ty);
2294 case Instruction::Mul:
2295 return ConstantInt::get(Ty, 1);
2297 case Instruction::And:
2298 return Constant::getAllOnesValue(Ty);
2302 /// getBinOpAbsorber - Return the absorbing element for the given binary
2303 /// operation, i.e. a constant C such that X op C = C and C op X = C for
2304 /// every X. For example, this returns zero for integer multiplication.
2305 /// It returns null if the operator doesn't have an absorbing element.
2306 Constant *ConstantExpr::getBinOpAbsorber(unsigned Opcode, Type *Ty) {
2309 // Doesn't have an absorber.
2312 case Instruction::Or:
2313 return Constant::getAllOnesValue(Ty);
2315 case Instruction::And:
2316 case Instruction::Mul:
2317 return Constant::getNullValue(Ty);
2321 // destroyConstant - Remove the constant from the constant table...
2323 void ConstantExpr::destroyConstantImpl() {
2324 getType()->getContext().pImpl->ExprConstants.remove(this);
2327 const char *ConstantExpr::getOpcodeName() const {
2328 return Instruction::getOpcodeName(getOpcode());
2331 GetElementPtrConstantExpr::GetElementPtrConstantExpr(
2332 Type *SrcElementTy, Constant *C, ArrayRef<Constant *> IdxList, Type *DestTy)
2333 : ConstantExpr(DestTy, Instruction::GetElementPtr,
2334 OperandTraits<GetElementPtrConstantExpr>::op_end(this) -
2335 (IdxList.size() + 1),
2336 IdxList.size() + 1),
2337 SrcElementTy(SrcElementTy) {
2339 Use *OperandList = getOperandList();
2340 for (unsigned i = 0, E = IdxList.size(); i != E; ++i)
2341 OperandList[i+1] = IdxList[i];
2344 Type *GetElementPtrConstantExpr::getSourceElementType() const {
2345 return SrcElementTy;
2348 //===----------------------------------------------------------------------===//
2349 // ConstantData* implementations
2351 void ConstantDataArray::anchor() {}
2352 void ConstantDataVector::anchor() {}
2354 /// getElementType - Return the element type of the array/vector.
2355 Type *ConstantDataSequential::getElementType() const {
2356 return getType()->getElementType();
2359 StringRef ConstantDataSequential::getRawDataValues() const {
2360 return StringRef(DataElements, getNumElements()*getElementByteSize());
2363 /// isElementTypeCompatible - Return true if a ConstantDataSequential can be
2364 /// formed with a vector or array of the specified element type.
2365 /// ConstantDataArray only works with normal float and int types that are
2366 /// stored densely in memory, not with things like i42 or x86_f80.
2367 bool ConstantDataSequential::isElementTypeCompatible(Type *Ty) {
2368 if (Ty->isFloatTy() || Ty->isDoubleTy()) return true;
2369 if (auto *IT = dyn_cast<IntegerType>(Ty)) {
2370 switch (IT->getBitWidth()) {
2382 /// getNumElements - Return the number of elements in the array or vector.
2383 unsigned ConstantDataSequential::getNumElements() const {
2384 if (ArrayType *AT = dyn_cast<ArrayType>(getType()))
2385 return AT->getNumElements();
2386 return getType()->getVectorNumElements();
2390 /// getElementByteSize - Return the size in bytes of the elements in the data.
2391 uint64_t ConstantDataSequential::getElementByteSize() const {
2392 return getElementType()->getPrimitiveSizeInBits()/8;
2395 /// getElementPointer - Return the start of the specified element.
2396 const char *ConstantDataSequential::getElementPointer(unsigned Elt) const {
2397 assert(Elt < getNumElements() && "Invalid Elt");
2398 return DataElements+Elt*getElementByteSize();
2402 /// isAllZeros - return true if the array is empty or all zeros.
2403 static bool isAllZeros(StringRef Arr) {
2404 for (StringRef::iterator I = Arr.begin(), E = Arr.end(); I != E; ++I)
2410 /// getImpl - This is the underlying implementation of all of the
2411 /// ConstantDataSequential::get methods. They all thunk down to here, providing
2412 /// the correct element type. We take the bytes in as a StringRef because
2413 /// we *want* an underlying "char*" to avoid TBAA type punning violations.
2414 Constant *ConstantDataSequential::getImpl(StringRef Elements, Type *Ty) {
2415 assert(isElementTypeCompatible(Ty->getSequentialElementType()));
2416 // If the elements are all zero or there are no elements, return a CAZ, which
2417 // is more dense and canonical.
2418 if (isAllZeros(Elements))
2419 return ConstantAggregateZero::get(Ty);
2421 // Do a lookup to see if we have already formed one of these.
2424 .pImpl->CDSConstants.insert(std::make_pair(Elements, nullptr))
2427 // The bucket can point to a linked list of different CDS's that have the same
2428 // body but different types. For example, 0,0,0,1 could be a 4 element array
2429 // of i8, or a 1-element array of i32. They'll both end up in the same
2430 /// StringMap bucket, linked up by their Next pointers. Walk the list.
2431 ConstantDataSequential **Entry = &Slot.second;
2432 for (ConstantDataSequential *Node = *Entry; Node;
2433 Entry = &Node->Next, Node = *Entry)
2434 if (Node->getType() == Ty)
2437 // Okay, we didn't get a hit. Create a node of the right class, link it in,
2439 if (isa<ArrayType>(Ty))
2440 return *Entry = new ConstantDataArray(Ty, Slot.first().data());
2442 assert(isa<VectorType>(Ty));
2443 return *Entry = new ConstantDataVector(Ty, Slot.first().data());
2446 void ConstantDataSequential::destroyConstantImpl() {
2447 // Remove the constant from the StringMap.
2448 StringMap<ConstantDataSequential*> &CDSConstants =
2449 getType()->getContext().pImpl->CDSConstants;
2451 StringMap<ConstantDataSequential*>::iterator Slot =
2452 CDSConstants.find(getRawDataValues());
2454 assert(Slot != CDSConstants.end() && "CDS not found in uniquing table");
2456 ConstantDataSequential **Entry = &Slot->getValue();
2458 // Remove the entry from the hash table.
2459 if (!(*Entry)->Next) {
2460 // If there is only one value in the bucket (common case) it must be this
2461 // entry, and removing the entry should remove the bucket completely.
2462 assert((*Entry) == this && "Hash mismatch in ConstantDataSequential");
2463 getContext().pImpl->CDSConstants.erase(Slot);
2465 // Otherwise, there are multiple entries linked off the bucket, unlink the
2466 // node we care about but keep the bucket around.
2467 for (ConstantDataSequential *Node = *Entry; ;
2468 Entry = &Node->Next, Node = *Entry) {
2469 assert(Node && "Didn't find entry in its uniquing hash table!");
2470 // If we found our entry, unlink it from the list and we're done.
2472 *Entry = Node->Next;
2478 // If we were part of a list, make sure that we don't delete the list that is
2479 // still owned by the uniquing map.
2483 /// get() constructors - Return a constant with array type with an element
2484 /// count and element type matching the ArrayRef passed in. Note that this
2485 /// can return a ConstantAggregateZero object.
2486 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint8_t> Elts) {
2487 Type *Ty = ArrayType::get(Type::getInt8Ty(Context), Elts.size());
2488 const char *Data = reinterpret_cast<const char *>(Elts.data());
2489 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*1), Ty);
2491 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint16_t> Elts){
2492 Type *Ty = ArrayType::get(Type::getInt16Ty(Context), Elts.size());
2493 const char *Data = reinterpret_cast<const char *>(Elts.data());
2494 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*2), Ty);
2496 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint32_t> Elts){
2497 Type *Ty = ArrayType::get(Type::getInt32Ty(Context), Elts.size());
2498 const char *Data = reinterpret_cast<const char *>(Elts.data());
2499 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2501 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<uint64_t> Elts){
2502 Type *Ty = ArrayType::get(Type::getInt64Ty(Context), Elts.size());
2503 const char *Data = reinterpret_cast<const char *>(Elts.data());
2504 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*8), Ty);
2506 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<float> Elts) {
2507 Type *Ty = ArrayType::get(Type::getFloatTy(Context), Elts.size());
2508 const char *Data = reinterpret_cast<const char *>(Elts.data());
2509 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2511 Constant *ConstantDataArray::get(LLVMContext &Context, ArrayRef<double> Elts) {
2512 Type *Ty = ArrayType::get(Type::getDoubleTy(Context), Elts.size());
2513 const char *Data = reinterpret_cast<const char *>(Elts.data());
2514 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2517 /// getFP() constructors - Return a constant with array type with an element
2518 /// count and element type of float with precision matching the number of
2519 /// bits in the ArrayRef passed in. (i.e. half for 16bits, float for 32bits,
2520 /// double for 64bits) Note that this can return a ConstantAggregateZero
2522 Constant *ConstantDataArray::getFP(LLVMContext &Context,
2523 ArrayRef<uint16_t> Elts) {
2524 Type *Ty = VectorType::get(Type::getHalfTy(Context), Elts.size());
2525 const char *Data = reinterpret_cast<const char *>(Elts.data());
2526 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 2), Ty);
2528 Constant *ConstantDataArray::getFP(LLVMContext &Context,
2529 ArrayRef<uint32_t> Elts) {
2530 Type *Ty = ArrayType::get(Type::getFloatTy(Context), Elts.size());
2531 const char *Data = reinterpret_cast<const char *>(Elts.data());
2532 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 4), Ty);
2534 Constant *ConstantDataArray::getFP(LLVMContext &Context,
2535 ArrayRef<uint64_t> Elts) {
2536 Type *Ty = ArrayType::get(Type::getDoubleTy(Context), Elts.size());
2537 const char *Data = reinterpret_cast<const char *>(Elts.data());
2538 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2541 /// getString - This method constructs a CDS and initializes it with a text
2542 /// string. The default behavior (AddNull==true) causes a null terminator to
2543 /// be placed at the end of the array (increasing the length of the string by
2544 /// one more than the StringRef would normally indicate. Pass AddNull=false
2545 /// to disable this behavior.
2546 Constant *ConstantDataArray::getString(LLVMContext &Context,
2547 StringRef Str, bool AddNull) {
2549 const uint8_t *Data = reinterpret_cast<const uint8_t *>(Str.data());
2550 return get(Context, makeArrayRef(const_cast<uint8_t *>(Data),
2554 SmallVector<uint8_t, 64> ElementVals;
2555 ElementVals.append(Str.begin(), Str.end());
2556 ElementVals.push_back(0);
2557 return get(Context, ElementVals);
2560 /// get() constructors - Return a constant with vector type with an element
2561 /// count and element type matching the ArrayRef passed in. Note that this
2562 /// can return a ConstantAggregateZero object.
2563 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint8_t> Elts){
2564 Type *Ty = VectorType::get(Type::getInt8Ty(Context), Elts.size());
2565 const char *Data = reinterpret_cast<const char *>(Elts.data());
2566 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*1), Ty);
2568 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint16_t> Elts){
2569 Type *Ty = VectorType::get(Type::getInt16Ty(Context), Elts.size());
2570 const char *Data = reinterpret_cast<const char *>(Elts.data());
2571 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*2), Ty);
2573 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint32_t> Elts){
2574 Type *Ty = VectorType::get(Type::getInt32Ty(Context), Elts.size());
2575 const char *Data = reinterpret_cast<const char *>(Elts.data());
2576 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2578 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<uint64_t> Elts){
2579 Type *Ty = VectorType::get(Type::getInt64Ty(Context), Elts.size());
2580 const char *Data = reinterpret_cast<const char *>(Elts.data());
2581 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*8), Ty);
2583 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<float> Elts) {
2584 Type *Ty = VectorType::get(Type::getFloatTy(Context), Elts.size());
2585 const char *Data = reinterpret_cast<const char *>(Elts.data());
2586 return getImpl(StringRef(const_cast<char *>(Data), Elts.size()*4), Ty);
2588 Constant *ConstantDataVector::get(LLVMContext &Context, ArrayRef<double> Elts) {
2589 Type *Ty = VectorType::get(Type::getDoubleTy(Context), Elts.size());
2590 const char *Data = reinterpret_cast<const char *>(Elts.data());
2591 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2594 /// getFP() constructors - Return a constant with vector type with an element
2595 /// count and element type of float with the precision matching the number of
2596 /// bits in the ArrayRef passed in. (i.e. half for 16bits, float for 32bits,
2597 /// double for 64bits) Note that this can return a ConstantAggregateZero
2599 Constant *ConstantDataVector::getFP(LLVMContext &Context,
2600 ArrayRef<uint16_t> Elts) {
2601 Type *Ty = VectorType::get(Type::getHalfTy(Context), Elts.size());
2602 const char *Data = reinterpret_cast<const char *>(Elts.data());
2603 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 2), Ty);
2605 Constant *ConstantDataVector::getFP(LLVMContext &Context,
2606 ArrayRef<uint32_t> Elts) {
2607 Type *Ty = VectorType::get(Type::getFloatTy(Context), Elts.size());
2608 const char *Data = reinterpret_cast<const char *>(Elts.data());
2609 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 4), Ty);
2611 Constant *ConstantDataVector::getFP(LLVMContext &Context,
2612 ArrayRef<uint64_t> Elts) {
2613 Type *Ty = VectorType::get(Type::getDoubleTy(Context), Elts.size());
2614 const char *Data = reinterpret_cast<const char *>(Elts.data());
2615 return getImpl(StringRef(const_cast<char *>(Data), Elts.size() * 8), Ty);
2618 Constant *ConstantDataVector::getSplat(unsigned NumElts, Constant *V) {
2619 assert(isElementTypeCompatible(V->getType()) &&
2620 "Element type not compatible with ConstantData");
2621 if (ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
2622 if (CI->getType()->isIntegerTy(8)) {
2623 SmallVector<uint8_t, 16> Elts(NumElts, CI->getZExtValue());
2624 return get(V->getContext(), Elts);
2626 if (CI->getType()->isIntegerTy(16)) {
2627 SmallVector<uint16_t, 16> Elts(NumElts, CI->getZExtValue());
2628 return get(V->getContext(), Elts);
2630 if (CI->getType()->isIntegerTy(32)) {
2631 SmallVector<uint32_t, 16> Elts(NumElts, CI->getZExtValue());
2632 return get(V->getContext(), Elts);
2634 assert(CI->getType()->isIntegerTy(64) && "Unsupported ConstantData type");
2635 SmallVector<uint64_t, 16> Elts(NumElts, CI->getZExtValue());
2636 return get(V->getContext(), Elts);
2639 if (ConstantFP *CFP = dyn_cast<ConstantFP>(V)) {
2640 if (CFP->getType()->isFloatTy()) {
2641 SmallVector<uint32_t, 16> Elts(
2642 NumElts, CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
2643 return getFP(V->getContext(), Elts);
2645 if (CFP->getType()->isDoubleTy()) {
2646 SmallVector<uint64_t, 16> Elts(
2647 NumElts, CFP->getValueAPF().bitcastToAPInt().getLimitedValue());
2648 return getFP(V->getContext(), Elts);
2651 return ConstantVector::getSplat(NumElts, V);
2655 /// getElementAsInteger - If this is a sequential container of integers (of
2656 /// any size), return the specified element in the low bits of a uint64_t.
2657 uint64_t ConstantDataSequential::getElementAsInteger(unsigned Elt) const {
2658 assert(isa<IntegerType>(getElementType()) &&
2659 "Accessor can only be used when element is an integer");
2660 const char *EltPtr = getElementPointer(Elt);
2662 // The data is stored in host byte order, make sure to cast back to the right
2663 // type to load with the right endianness.
2664 switch (getElementType()->getIntegerBitWidth()) {
2665 default: llvm_unreachable("Invalid bitwidth for CDS");
2667 return *const_cast<uint8_t *>(reinterpret_cast<const uint8_t *>(EltPtr));
2669 return *const_cast<uint16_t *>(reinterpret_cast<const uint16_t *>(EltPtr));
2671 return *const_cast<uint32_t *>(reinterpret_cast<const uint32_t *>(EltPtr));
2673 return *const_cast<uint64_t *>(reinterpret_cast<const uint64_t *>(EltPtr));
2677 /// getElementAsAPFloat - If this is a sequential container of floating point
2678 /// type, return the specified element as an APFloat.
2679 APFloat ConstantDataSequential::getElementAsAPFloat(unsigned Elt) const {
2680 const char *EltPtr = getElementPointer(Elt);
2682 switch (getElementType()->getTypeID()) {
2684 llvm_unreachable("Accessor can only be used when element is float/double!");
2685 case Type::FloatTyID: {
2686 auto EltVal = *reinterpret_cast<const uint32_t *>(EltPtr);
2687 return APFloat(APFloat::IEEEsingle, APInt(32, EltVal));
2689 case Type::DoubleTyID: {
2690 auto EltVal = *reinterpret_cast<const uint64_t *>(EltPtr);
2691 return APFloat(APFloat::IEEEdouble, APInt(64, EltVal));
2696 /// getElementAsFloat - If this is an sequential container of floats, return
2697 /// the specified element as a float.
2698 float ConstantDataSequential::getElementAsFloat(unsigned Elt) const {
2699 assert(getElementType()->isFloatTy() &&
2700 "Accessor can only be used when element is a 'float'");
2701 const float *EltPtr = reinterpret_cast<const float *>(getElementPointer(Elt));
2702 return *const_cast<float *>(EltPtr);
2705 /// getElementAsDouble - If this is an sequential container of doubles, return
2706 /// the specified element as a float.
2707 double ConstantDataSequential::getElementAsDouble(unsigned Elt) const {
2708 assert(getElementType()->isDoubleTy() &&
2709 "Accessor can only be used when element is a 'float'");
2710 const double *EltPtr =
2711 reinterpret_cast<const double *>(getElementPointer(Elt));
2712 return *const_cast<double *>(EltPtr);
2715 /// getElementAsConstant - Return a Constant for a specified index's element.
2716 /// Note that this has to compute a new constant to return, so it isn't as
2717 /// efficient as getElementAsInteger/Float/Double.
2718 Constant *ConstantDataSequential::getElementAsConstant(unsigned Elt) const {
2719 if (getElementType()->isFloatTy() || getElementType()->isDoubleTy())
2720 return ConstantFP::get(getContext(), getElementAsAPFloat(Elt));
2722 return ConstantInt::get(getElementType(), getElementAsInteger(Elt));
2725 /// isString - This method returns true if this is an array of i8.
2726 bool ConstantDataSequential::isString() const {
2727 return isa<ArrayType>(getType()) && getElementType()->isIntegerTy(8);
2730 /// isCString - This method returns true if the array "isString", ends with a
2731 /// nul byte, and does not contains any other nul bytes.
2732 bool ConstantDataSequential::isCString() const {
2736 StringRef Str = getAsString();
2738 // The last value must be nul.
2739 if (Str.back() != 0) return false;
2741 // Other elements must be non-nul.
2742 return Str.drop_back().find(0) == StringRef::npos;
2745 /// getSplatValue - If this is a splat constant, meaning that all of the
2746 /// elements have the same value, return that value. Otherwise return nullptr.
2747 Constant *ConstantDataVector::getSplatValue() const {
2748 const char *Base = getRawDataValues().data();
2750 // Compare elements 1+ to the 0'th element.
2751 unsigned EltSize = getElementByteSize();
2752 for (unsigned i = 1, e = getNumElements(); i != e; ++i)
2753 if (memcmp(Base, Base+i*EltSize, EltSize))
2756 // If they're all the same, return the 0th one as a representative.
2757 return getElementAsConstant(0);
2760 //===----------------------------------------------------------------------===//
2761 // handleOperandChange implementations
2763 /// Update this constant array to change uses of
2764 /// 'From' to be uses of 'To'. This must update the uniquing data structures
2767 /// Note that we intentionally replace all uses of From with To here. Consider
2768 /// a large array that uses 'From' 1000 times. By handling this case all here,
2769 /// ConstantArray::handleOperandChange is only invoked once, and that
2770 /// single invocation handles all 1000 uses. Handling them one at a time would
2771 /// work, but would be really slow because it would have to unique each updated
2774 void Constant::handleOperandChange(Value *From, Value *To, Use *U) {
2775 Value *Replacement = nullptr;
2776 switch (getValueID()) {
2778 llvm_unreachable("Not a constant!");
2779 #define HANDLE_CONSTANT(Name) \
2780 case Value::Name##Val: \
2781 Replacement = cast<Name>(this)->handleOperandChangeImpl(From, To, U); \
2783 #include "llvm/IR/Value.def"
2786 // If handleOperandChangeImpl returned nullptr, then it handled
2787 // replacing itself and we don't want to delete or replace anything else here.
2791 // I do need to replace this with an existing value.
2792 assert(Replacement != this && "I didn't contain From!");
2794 // Everyone using this now uses the replacement.
2795 replaceAllUsesWith(Replacement);
2797 // Delete the old constant!
2801 Value *ConstantInt::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
2802 llvm_unreachable("Unsupported class for handleOperandChange()!");
2805 Value *ConstantFP::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
2806 llvm_unreachable("Unsupported class for handleOperandChange()!");
2809 Value *ConstantTokenNone::handleOperandChangeImpl(Value *From, Value *To,
2811 llvm_unreachable("Unsupported class for handleOperandChange()!");
2814 Value *UndefValue::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
2815 llvm_unreachable("Unsupported class for handleOperandChange()!");
2818 Value *ConstantPointerNull::handleOperandChangeImpl(Value *From, Value *To,
2820 llvm_unreachable("Unsupported class for handleOperandChange()!");
2823 Value *ConstantAggregateZero::handleOperandChangeImpl(Value *From, Value *To,
2825 llvm_unreachable("Unsupported class for handleOperandChange()!");
2828 Value *ConstantDataSequential::handleOperandChangeImpl(Value *From, Value *To,
2830 llvm_unreachable("Unsupported class for handleOperandChange()!");
2833 Value *ConstantArray::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
2834 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2835 Constant *ToC = cast<Constant>(To);
2837 SmallVector<Constant*, 8> Values;
2838 Values.reserve(getNumOperands()); // Build replacement array.
2840 // Fill values with the modified operands of the constant array. Also,
2841 // compute whether this turns into an all-zeros array.
2842 unsigned NumUpdated = 0;
2844 // Keep track of whether all the values in the array are "ToC".
2845 bool AllSame = true;
2846 Use *OperandList = getOperandList();
2847 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2848 Constant *Val = cast<Constant>(O->get());
2853 Values.push_back(Val);
2854 AllSame &= Val == ToC;
2857 if (AllSame && ToC->isNullValue())
2858 return ConstantAggregateZero::get(getType());
2860 if (AllSame && isa<UndefValue>(ToC))
2861 return UndefValue::get(getType());
2863 // Check for any other type of constant-folding.
2864 if (Constant *C = getImpl(getType(), Values))
2867 // Update to the new value.
2868 return getContext().pImpl->ArrayConstants.replaceOperandsInPlace(
2869 Values, this, From, ToC, NumUpdated, U - OperandList);
2872 Value *ConstantStruct::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
2873 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2874 Constant *ToC = cast<Constant>(To);
2876 Use *OperandList = getOperandList();
2877 unsigned OperandToUpdate = U-OperandList;
2878 assert(getOperand(OperandToUpdate) == From && "ReplaceAllUsesWith broken!");
2880 SmallVector<Constant*, 8> Values;
2881 Values.reserve(getNumOperands()); // Build replacement struct.
2883 // Fill values with the modified operands of the constant struct. Also,
2884 // compute whether this turns into an all-zeros struct.
2885 bool isAllZeros = false;
2886 bool isAllUndef = false;
2887 if (ToC->isNullValue()) {
2889 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2890 Constant *Val = cast<Constant>(O->get());
2891 Values.push_back(Val);
2892 if (isAllZeros) isAllZeros = Val->isNullValue();
2894 } else if (isa<UndefValue>(ToC)) {
2896 for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
2897 Constant *Val = cast<Constant>(O->get());
2898 Values.push_back(Val);
2899 if (isAllUndef) isAllUndef = isa<UndefValue>(Val);
2902 for (Use *O = OperandList, *E = OperandList + getNumOperands(); O != E; ++O)
2903 Values.push_back(cast<Constant>(O->get()));
2905 Values[OperandToUpdate] = ToC;
2908 return ConstantAggregateZero::get(getType());
2911 return UndefValue::get(getType());
2913 // Update to the new value.
2914 return getContext().pImpl->StructConstants.replaceOperandsInPlace(
2915 Values, this, From, ToC);
2918 Value *ConstantVector::handleOperandChangeImpl(Value *From, Value *To, Use *U) {
2919 assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
2920 Constant *ToC = cast<Constant>(To);
2922 SmallVector<Constant*, 8> Values;
2923 Values.reserve(getNumOperands()); // Build replacement array...
2924 unsigned NumUpdated = 0;
2925 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
2926 Constant *Val = getOperand(i);
2931 Values.push_back(Val);
2934 if (Constant *C = getImpl(Values))
2937 // Update to the new value.
2938 Use *OperandList = getOperandList();
2939 return getContext().pImpl->VectorConstants.replaceOperandsInPlace(
2940 Values, this, From, ToC, NumUpdated, U - OperandList);
2943 Value *ConstantExpr::handleOperandChangeImpl(Value *From, Value *ToV, Use *U) {
2944 assert(isa<Constant>(ToV) && "Cannot make Constant refer to non-constant!");
2945 Constant *To = cast<Constant>(ToV);
2947 SmallVector<Constant*, 8> NewOps;
2948 unsigned NumUpdated = 0;
2949 for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
2950 Constant *Op = getOperand(i);
2955 NewOps.push_back(Op);
2957 assert(NumUpdated && "I didn't contain From!");
2959 if (Constant *C = getWithOperands(NewOps, getType(), true))
2962 // Update to the new value.
2963 Use *OperandList = getOperandList();
2964 return getContext().pImpl->ExprConstants.replaceOperandsInPlace(
2965 NewOps, this, From, To, NumUpdated, U - OperandList);
2968 Instruction *ConstantExpr::getAsInstruction() {
2969 SmallVector<Value *, 4> ValueOperands(op_begin(), op_end());
2970 ArrayRef<Value*> Ops(ValueOperands);
2972 switch (getOpcode()) {
2973 case Instruction::Trunc:
2974 case Instruction::ZExt:
2975 case Instruction::SExt:
2976 case Instruction::FPTrunc:
2977 case Instruction::FPExt:
2978 case Instruction::UIToFP:
2979 case Instruction::SIToFP:
2980 case Instruction::FPToUI:
2981 case Instruction::FPToSI:
2982 case Instruction::PtrToInt:
2983 case Instruction::IntToPtr:
2984 case Instruction::BitCast:
2985 case Instruction::AddrSpaceCast:
2986 return CastInst::Create((Instruction::CastOps)getOpcode(),
2988 case Instruction::Select:
2989 return SelectInst::Create(Ops[0], Ops[1], Ops[2]);
2990 case Instruction::InsertElement:
2991 return InsertElementInst::Create(Ops[0], Ops[1], Ops[2]);
2992 case Instruction::ExtractElement:
2993 return ExtractElementInst::Create(Ops[0], Ops[1]);
2994 case Instruction::InsertValue:
2995 return InsertValueInst::Create(Ops[0], Ops[1], getIndices());
2996 case Instruction::ExtractValue:
2997 return ExtractValueInst::Create(Ops[0], getIndices());
2998 case Instruction::ShuffleVector:
2999 return new ShuffleVectorInst(Ops[0], Ops[1], Ops[2]);
3001 case Instruction::GetElementPtr: {
3002 const auto *GO = cast<GEPOperator>(this);
3003 if (GO->isInBounds())
3004 return GetElementPtrInst::CreateInBounds(GO->getSourceElementType(),
3005 Ops[0], Ops.slice(1));
3006 return GetElementPtrInst::Create(GO->getSourceElementType(), Ops[0],
3009 case Instruction::ICmp:
3010 case Instruction::FCmp:
3011 return CmpInst::Create((Instruction::OtherOps)getOpcode(),
3012 getPredicate(), Ops[0], Ops[1]);
3015 assert(getNumOperands() == 2 && "Must be binary operator?");
3016 BinaryOperator *BO =
3017 BinaryOperator::Create((Instruction::BinaryOps)getOpcode(),
3019 if (isa<OverflowingBinaryOperator>(BO)) {
3020 BO->setHasNoUnsignedWrap(SubclassOptionalData &
3021 OverflowingBinaryOperator::NoUnsignedWrap);
3022 BO->setHasNoSignedWrap(SubclassOptionalData &
3023 OverflowingBinaryOperator::NoSignedWrap);
3025 if (isa<PossiblyExactOperator>(BO))
3026 BO->setIsExact(SubclassOptionalData & PossiblyExactOperator::IsExact);