#include "llvm/DerivedTypes.h"
#include "llvm/Function.h"
#include "llvm/GlobalAlias.h"
+#include "llvm/LLVMContext.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/Compiler.h"
+#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MathExtras.h"
/// BitCastConstantVector - Convert the specified ConstantVector node to the
/// specified vector type. At this point, we know that the elements of the
/// input vector constant are all simple integer or FP values.
-static Constant *BitCastConstantVector(ConstantVector *CV,
+static Constant *BitCastConstantVector(LLVMContext &Context, ConstantVector *CV,
const VectorType *DstTy) {
// If this cast changes element count then we can't handle it here:
// doing so requires endianness information. This should be handled by
std::vector<Constant*> Result;
const Type *DstEltTy = DstTy->getElementType();
for (unsigned i = 0; i != NumElts; ++i)
- Result.push_back(ConstantExpr::getBitCast(CV->getOperand(i), DstEltTy));
+ Result.push_back(Context.getConstantExprBitCast(CV->getOperand(i),
+ DstEltTy));
return ConstantVector::get(Result);
}
Type::Int64Ty);
}
-static Constant *FoldBitCast(Constant *V, const Type *DestTy) {
+static Constant *FoldBitCast(LLVMContext &Context,
+ Constant *V, const Type *DestTy) {
const Type *SrcTy = V->getType();
if (SrcTy == DestTy)
return V; // no-op cast
if (const PointerType *DPTy = dyn_cast<PointerType>(DestTy))
if (PTy->getAddressSpace() == DPTy->getAddressSpace()) {
SmallVector<Value*, 8> IdxList;
- IdxList.push_back(Constant::getNullValue(Type::Int32Ty));
+ IdxList.push_back(Context.getNullValue(Type::Int32Ty));
const Type *ElTy = PTy->getElementType();
while (ElTy != DPTy->getElementType()) {
if (const StructType *STy = dyn_cast<StructType>(ElTy)) {
if (STy->getNumElements() == 0) break;
ElTy = STy->getElementType(0);
- IdxList.push_back(Constant::getNullValue(Type::Int32Ty));
+ IdxList.push_back(Context.getNullValue(Type::Int32Ty));
} else if (const SequentialType *STy =
dyn_cast<SequentialType>(ElTy)) {
if (isa<PointerType>(ElTy)) break; // Can't index into pointers!
}
if (ElTy == DPTy->getElementType())
- return ConstantExpr::getGetElementPtr(V, &IdxList[0], IdxList.size());
+ return Context.getConstantExprGetElementPtr(V, &IdxList[0],
+ IdxList.size());
}
// Handle casts from one vector constant to another. We know that the src
if (const VectorType *SrcTy = dyn_cast<VectorType>(V->getType())) {
assert(DestPTy->getBitWidth() == SrcTy->getBitWidth() &&
"Not cast between same sized vectors!");
+ SrcTy = NULL;
// First, check for null. Undef is already handled.
if (isa<ConstantAggregateZero>(V))
- return Constant::getNullValue(DestTy);
+ return Context.getNullValue(DestTy);
if (ConstantVector *CV = dyn_cast<ConstantVector>(V))
- return BitCastConstantVector(CV, DestPTy);
+ return BitCastConstantVector(Context, CV, DestPTy);
}
+
+ // Canonicalize scalar-to-vector bitcasts into vector-to-vector bitcasts
+ // This allows for other simplifications (although some of them
+ // can only be handled by Analysis/ConstantFolding.cpp).
+ if (isa<ConstantInt>(V) || isa<ConstantFP>(V))
+ return Context.getConstantExprBitCast(
+ ConstantVector::get(&V, 1), DestPTy);
}
// Finally, implement bitcast folding now. The code below doesn't handle
// bitcast right.
if (isa<ConstantPointerNull>(V)) // ptr->ptr cast.
- return Con
stantPointerNull::get(cast<PointerType>(DestTy));
+ return Con
text.getConstantPointerNull(cast<PointerType>(DestTy));
// Handle integral constant input.
if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
// Integral -> Integral. This is a no-op because the bit widths must
// be the same. Consequently, we just fold to V.
return V;
-
- if (DestTy->isFloatingPoint()) {
- assert((DestTy == Type::DoubleTy || DestTy == Type::FloatTy) &&
- "Unknown FP type!");
- return ConstantFP::get(APFloat(CI->getValue()));
- }
+
+ if (DestTy->isFloatingPoint())
+ return ConstantFP::get(Context, APFloat(CI->getValue(),
+ DestTy != Type::PPC_FP128Ty));
+
// Otherwise, can't fold this (vector?)
return 0;
}
-
+
// Handle ConstantFP input.
- if (const ConstantFP *FP = dyn_cast<ConstantFP>(V)) {
+ if (const ConstantFP *FP = dyn_cast<ConstantFP>(V))
// FP -> Integral.
- if (DestTy == Type::Int32Ty) {
- return ConstantInt::get(FP->getValueAPF().convertToAPInt());
- } else {
- assert(DestTy == Type::Int64Ty && "only support f32/f64 for now!");
- return ConstantInt::get(FP->getValueAPF().convertToAPInt());
- }
- }
+ return ConstantInt::get(Context, FP->getValueAPF().bitcastToAPInt());
+
return 0;
}
-Constant *llvm::ConstantFoldCastInstruction(unsigned opc, const Constant *V,
+Constant *llvm::ConstantFoldCastInstruction(LLVMContext &Context,
+ unsigned opc, const Constant *V,
const Type *DestTy) {
if (isa<UndefValue>(V)) {
// zext(undef) = 0, because the top bits will be zero.
// [us]itofp(undef) = 0, because the result value is bounded.
if (opc == Instruction::ZExt || opc == Instruction::SExt ||
opc == Instruction::UIToFP || opc == Instruction::SIToFP)
- return Constant::getNullValue(DestTy);
- return UndefValue::get(DestTy);
+ return Context.getNullValue(DestTy);
+ return Context.getUndef(DestTy);
}
// No compile-time operations on this type yet.
if (V->getType() == Type::PPC_FP128Ty || DestTy == Type::PPC_FP128Ty)
if (CE->isCast()) {
// Try hard to fold cast of cast because they are often eliminable.
if (unsigned newOpc = foldConstantCastPair(opc, CE, DestTy))
- return ConstantExpr::getCast(newOpc, CE->getOperand(0), DestTy);
+ return Context.getConstantExprCast(newOpc, CE->getOperand(0), DestTy);
} else if (CE->getOpcode() == Instruction::GetElementPtr) {
// If all of the indexes in the GEP are null values, there is no pointer
// adjustment going on. We might as well cast the source pointer.
}
if (isAllNull)
// This is casting one pointer type to another, always BitCast
- return ConstantExpr::getPointerCast(CE->getOperand(0), DestTy);
+ return Context.getConstantExprPointerCast(CE->getOperand(0), DestTy);
}
}
+ // If the cast operand is a constant vector, perform the cast by
+ // operating on each element. In the cast of bitcasts, the element
+ // count may be mismatched; don't attempt to handle that here.
+ if (const ConstantVector *CV = dyn_cast<ConstantVector>(V))
+ if (isa<VectorType>(DestTy) &&
+ cast<VectorType>(DestTy)->getNumElements() ==
+ CV->getType()->getNumElements()) {
+ std::vector<Constant*> res;
+ const VectorType *DestVecTy = cast<VectorType>(DestTy);
+ const Type *DstEltTy = DestVecTy->getElementType();
+ for (unsigned i = 0, e = CV->getType()->getNumElements(); i != e; ++i)
+ res.push_back(Context.getConstantExprCast(opc,
+ CV->getOperand(i), DstEltTy));
+ return ConstantVector::get(DestVecTy, res);
+ }
+
// We actually have to do a cast now. Perform the cast according to the
// opcode specified.
switch (opc) {
case Instruction::FPTrunc:
case Instruction::FPExt:
if (const ConstantFP *FPC = dyn_cast<ConstantFP>(V)) {
+ bool ignored;
APFloat Val = FPC->getValueAPF();
Val.convert(DestTy == Type::FloatTy ? APFloat::IEEEsingle :
DestTy == Type::DoubleTy ? APFloat::IEEEdouble :
DestTy == Type::X86_FP80Ty ? APFloat::x87DoubleExtended :
DestTy == Type::FP128Ty ? APFloat::IEEEquad :
APFloat::Bogus,
- APFloat::rmNearestTiesToEven);
- return ConstantFP::get(Val);
+ APFloat::rmNearestTiesToEven, &ignored);
+ return ConstantFP::get(Context, Val);
}
return 0; // Can't fold.
case Instruction::FPToUI:
case Instruction::FPToSI:
if (const ConstantFP *FPC = dyn_cast<ConstantFP>(V)) {
const APFloat &V = FPC->getValueAPF();
+ bool ignored;
uint64_t x[2];
uint32_t DestBitWidth = cast<IntegerType>(DestTy)->getBitWidth();
(void) V.convertToInteger(x, DestBitWidth, opc==Instruction::FPToSI,
- APFloat::rmTowardZero);
+ APFloat::rmTowardZero, &ignored);
APInt Val(DestBitWidth, 2, x);
- return ConstantInt::get(Val);
- }
- if (const ConstantVector *CV = dyn_cast<ConstantVector>(V)) {
- std::vector<Constant*> res;
- const VectorType *DestVecTy = cast<VectorType>(DestTy);
- const Type *DstEltTy = DestVecTy->getElementType();
- for (unsigned i = 0, e = CV->getType()->getNumElements(); i != e; ++i)
- res.push_back(ConstantFoldCastInstruction(opc, V->getOperand(i),
- DstEltTy));
- return ConstantVector::get(DestVecTy, res);
+ return ConstantInt::get(Context, Val);
}
return 0; // Can't fold.
case Instruction::IntToPtr: //always treated as unsigned
if (V->isNullValue()) // Is it an integral null value?
- return Con
stantPointerNull::get(cast<PointerType>(DestTy));
+ return Con
text.getConstantPointerNull(cast<PointerType>(DestTy));
return 0; // Other pointer types cannot be casted
case Instruction::PtrToInt: // always treated as unsigned
if (V->isNullValue()) // is it a null pointer value?
(void)apf.convertFromAPInt(api,
opc==Instruction::SIToFP,
APFloat::rmNearestTiesToEven);
- return ConstantFP::get(apf);
- }
- if (const ConstantVector *CV = dyn_cast<ConstantVector>(V)) {
- std::vector<Constant*> res;
- const VectorType *DestVecTy = cast<VectorType>(DestTy);
- const Type *DstEltTy = DestVecTy->getElementType();
- for (unsigned i = 0, e = CV->getType()->getNumElements(); i != e; ++i)
- res.push_back(ConstantFoldCastInstruction(opc, V->getOperand(i),
- DstEltTy));
- return ConstantVector::get(DestVecTy, res);
+ return ConstantFP::get(Context, apf);
}
return 0;
case Instruction::ZExt:
uint32_t BitWidth = cast<IntegerType>(DestTy)->getBitWidth();
APInt Result(CI->getValue());
Result.zext(BitWidth);
- return ConstantInt::get(Result);
+ return ConstantInt::get(Context, Result);
}
return 0;
case Instruction::SExt:
uint32_t BitWidth = cast<IntegerType>(DestTy)->getBitWidth();
APInt Result(CI->getValue());
Result.sext(BitWidth);
- return ConstantInt::get(Result);
+ return ConstantInt::get(Context, Result);
}
return 0;
case Instruction::Trunc:
uint32_t BitWidth = cast<IntegerType>(DestTy)->getBitWidth();
APInt Result(CI->getValue());
Result.trunc(BitWidth);
- return ConstantInt::get(Result);
+ return ConstantInt::get(Context, Result);
}
return 0;
case Instruction::BitCast:
- return FoldBitCast(const_cast<Constant*>(V), DestTy);
+ return FoldBitCast(Context, const_cast<Constant*>(V), DestTy);
default:
assert(!"Invalid CE CastInst opcode");
break;
}
- assert(0 && "Failed to cast constant expression");
+ llvm_unreachable("Failed to cast constant expression");
return 0;
}
-Constant *llvm::ConstantFoldSelectInstruction(const Constant *Cond,
+Constant *llvm::ConstantFoldSelectInstruction(LLVMContext&,
+ const Constant *Cond,
const Constant *V1,
const Constant *V2) {
if (const ConstantInt *CB = dyn_cast<ConstantInt>(Cond))
return 0;
}
-Constant *llvm::ConstantFoldExtractElementInstruction(const Constant *Val,
+Constant *llvm::ConstantFoldExtractElementInstruction(LLVMContext &Context,
+ const Constant *Val,
const Constant *Idx) {
if (isa<UndefValue>(Val)) // ee(undef, x) -> undef
- return UndefValue::get(cast<VectorType>(Val->getType())->getElementType());
+ return Context.getUndef(cast<VectorType>(Val->getType())->getElementType());
if (Val->isNullValue()) // ee(zero, x) -> zero
- return Constant::getNullValue(
+ return Context.getNullValue(
cast<VectorType>(Val->getType())->getElementType());
if (const ConstantVector *CVal = dyn_cast<ConstantVector>(Val)) {
return 0;
}
-Constant *llvm::ConstantFoldInsertElementInstruction(const Constant *Val,
+Constant *llvm::ConstantFoldInsertElementInstruction(LLVMContext &Context,
+ const Constant *Val,
const Constant *Elt,
const Constant *Idx) {
const ConstantInt *CIdx = dyn_cast<ConstantInt>(Idx);
Ops.reserve(numOps);
for (unsigned i = 0; i < numOps; ++i) {
const Constant *Op =
- (idxVal == i) ? Elt : UndefValue::get(Elt->getType());
+ (idxVal == i) ? Elt : Context.getUndef(Elt->getType());
Ops.push_back(const_cast<Constant*>(Op));
}
return ConstantVector::get(Ops);
Ops.reserve(numOps);
for (unsigned i = 0; i < numOps; ++i) {
const Constant *Op =
- (idxVal == i) ? Elt : Constant::getNullValue(Elt->getType());
+ (idxVal == i) ? Elt : Context.getNullValue(Elt->getType());
Ops.push_back(const_cast<Constant*>(Op));
}
return ConstantVector::get(Ops);
/// GetVectorElement - If C is a ConstantVector, ConstantAggregateZero or Undef
/// return the specified element value. Otherwise return null.
-static Constant *GetVectorElement(const Constant *C, unsigned EltNo) {
+static Constant *GetVectorElement(LLVMContext &Context, const Constant *C,
+ unsigned EltNo) {
if (const ConstantVector *CV = dyn_cast<ConstantVector>(C))
return CV->getOperand(EltNo);
const Type *EltTy = cast<VectorType>(C->getType())->getElementType();
if (isa<ConstantAggregateZero>(C))
- return Constant::getNullValue(EltTy);
+ return Context.getNullValue(EltTy);
if (isa<UndefValue>(C))
- return UndefValue::get(EltTy);
+ return Context.getUndef(EltTy);
return 0;
}
-Constant *llvm::ConstantFoldShuffleVectorInstruction(const Constant *V1,
+Constant *llvm::ConstantFoldShuffleVectorInstruction(LLVMContext &Context,
+ const Constant *V1,
const Constant *V2,
const Constant *Mask) {
// Undefined shuffle mask -> undefined value.
- if (isa<UndefValue>(Mask)) return UndefValue::get(V1->getType());
-
- unsigned NumElts = cast<VectorType>(V1->getType())->getNumElements();
+ if (isa<UndefValue>(Mask)) return Context.getUndef(V1->getType());
+
+ unsigned MaskNumElts = cast<VectorType>(Mask->getType())->getNumElements();
+ unsigned SrcNumElts = cast<VectorType>(V1->getType())->getNumElements();
const Type *EltTy = cast<VectorType>(V1->getType())->getElementType();
-
+
// Loop over the shuffle mask, evaluating each element.
SmallVector<Constant*, 32> Result;
- for (unsigned i = 0; i != NumElts; ++i) {
- Constant *InElt = GetVectorElement(Mask, i);
+ for (unsigned i = 0; i != MaskNumElts; ++i) {
+ Constant *InElt = GetVectorElement(Context, Mask, i);
if (InElt == 0) return 0;
-
+
if (isa<UndefValue>(InElt))
- InElt = UndefValue::get(EltTy);
+ InElt = Context.getUndef(EltTy);
else if (ConstantInt *CI = dyn_cast<ConstantInt>(InElt)) {
unsigned Elt = CI->getZExtValue();
- if (Elt >= NumElts*2)
- InElt = UndefValue::get(EltTy);
- else if (Elt >= NumElts)
- InElt = GetVectorElement(V2, Elt-NumElts);
+ if (Elt >= SrcNumElts*2)
+ InElt = Context.getUndef(EltTy);
+ else if (Elt >= SrcNumElts)
+ InElt = GetVectorElement(Context, V2, Elt - SrcNumElts);
else
- InElt = GetVectorElement(V1, Elt);
+ InElt = GetVectorElement(Context, V1, Elt);
if (InElt == 0) return 0;
} else {
// Unknown value.
}
Result.push_back(InElt);
}
-
+
return ConstantVector::get(&Result[0], Result.size());
}
-Constant *llvm::ConstantFoldExtractValueInstruction(const Constant *Agg,
+Constant *llvm::ConstantFoldExtractValueInstruction(LLVMContext &Context,
+ const Constant *Agg,
const unsigned *Idxs,
unsigned NumIdx) {
// Base case: no indices, so return the entire value.
return const_cast<Constant *>(Agg);
if (isa<UndefValue>(Agg)) // ev(undef, x) -> undef
- return UndefValue::get(ExtractValueInst::getIndexedType(Agg->getType(),
+ return Context.getUndef(ExtractValueInst::getIndexedType(Agg->getType(),
Idxs,
Idxs + NumIdx));
if (isa<ConstantAggregateZero>(Agg)) // ev(0, x) -> 0
return
- Constant::getNullValue(ExtractValueInst::getIndexedType(Agg->getType(),
+ Context.getNullValue(ExtractValueInst::getIndexedType(Agg->getType(),
Idxs,
Idxs + NumIdx));
// Otherwise recurse.
- return ConstantFoldExtractValueInstruction(Agg->getOperand(*Idxs),
+ return ConstantFoldExtractValueInstruction(Context, Agg->getOperand(*Idxs),
Idxs+1, NumIdx-1);
}
-Constant *llvm::ConstantFoldInsertValueInstruction(const Constant *Agg,
+Constant *llvm::ConstantFoldInsertValueInstruction(LLVMContext &Context,
+ const Constant *Agg,
const Constant *Val,
const unsigned *Idxs,
unsigned NumIdx) {
const Type *MemberTy = AggTy->getTypeAtIndex(i);
const Constant *Op =
(*Idxs == i) ?
- ConstantFoldInsertValueInstruction(UndefValue::get(MemberTy),
+ ConstantFoldInsertValueInstruction(Context, Context.getUndef(MemberTy),
Val, Idxs+1, NumIdx-1) :
- UndefValue::get(MemberTy);
+ Context.getUndef(MemberTy);
Ops[i] = const_cast<Constant*>(Op);
}
if (isa<StructType>(AggTy))
const Type *MemberTy = AggTy->getTypeAtIndex(i);
const Constant *Op =
(*Idxs == i) ?
- ConstantFoldInsertValueInstruction(Constant::getNullValue(MemberTy),
+ ConstantFoldInsertValueInstruction(Context,
+ Context.getNullValue(MemberTy),
Val, Idxs+1, NumIdx-1) :
- Constant::getNullValue(MemberTy);
+ Context.getNullValue(MemberTy);
Ops[i] = const_cast<Constant*>(Op);
}
if (isa<StructType>(AggTy))
for (unsigned i = 0; i < Agg->getNumOperands(); ++i) {
const Constant *Op =
(*Idxs == i) ?
- ConstantFoldInsertValueInstruction(Agg->getOperand(i),
+ ConstantFoldInsertValueInstruction(Context, Agg->getOperand(i),
Val, Idxs+1, NumIdx-1) :
Agg->getOperand(i);
Ops[i] = const_cast<Constant*>(Op);
return 0;
}
-/// EvalVectorOp - Given two vector constants and a function pointer, apply the
-/// function pointer to each element pair, producing a new ConstantVector
-/// constant. Either or both of V1 and V2 may be NULL, meaning a
-/// ConstantAggregateZero operand.
-static Constant *EvalVectorOp(const ConstantVector *V1,
- const ConstantVector *V2,
- const VectorType *VTy,
- Constant *(*FP)(Constant*, Constant*)) {
- std::vector<Constant*> Res;
- const Type *EltTy = VTy->getElementType();
- for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
- const Constant *C1 = V1 ? V1->getOperand(i) : Constant::getNullValue(EltTy);
- const Constant *C2 = V2 ? V2->getOperand(i) : Constant::getNullValue(EltTy);
- Res.push_back(FP(const_cast<Constant*>(C1),
- const_cast<Constant*>(C2)));
- }
- return ConstantVector::get(Res);
-}
-Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode,
+Constant *llvm::ConstantFoldBinaryInstruction(LLVMContext &Context,
+ unsigned Opcode,
const Constant *C1,
const Constant *C2) {
// No compile-time operations on this type yet.
if (isa<UndefValue>(C1) && isa<UndefValue>(C2))
// Handle undef ^ undef -> 0 special case. This is a common
// idiom (misuse).
- return Constant::getNullValue(C1->getType());
+ return Context.getNullValue(C1->getType());
// Fallthrough
case Instruction::Add:
case Instruction::Sub:
- return UndefValue::get(C1->getType());
+ return Context.getUndef(C1->getType());
case Instruction::Mul:
case Instruction::And:
- return Constant::getNullValue(C1->getType());
+ return Context.getNullValue(C1->getType());
case Instruction::UDiv:
case Instruction::SDiv:
- case Instruction::FDiv:
case Instruction::URem:
case Instruction::SRem:
- case Instruction::FRem:
if (!isa<UndefValue>(C2)) // undef / X -> 0
- return Constant::getNullValue(C1->getType());
+ return Context.getNullValue(C1->getType());
return const_cast<Constant*>(C2); // X / undef -> undef
case Instruction::Or: // X | undef -> -1
if (const VectorType *PTy = dyn_cast<VectorType>(C1->getType()))
- return ConstantVector::getAllOnesValue(PTy);
- return ConstantInt::getAllOnesValue(C1->getType());
+ return Context.getAllOnesValue(PTy);
+ return Context.getAllOnesValue(C1->getType());
case Instruction::LShr:
if (isa<UndefValue>(C2) && isa<UndefValue>(C1))
return const_cast<Constant*>(C1); // undef lshr undef -> undef
- return Constant::getNullValue(C1->getType()); // X lshr undef -> 0
+ return Context.getNullValue(C1->getType()); // X lshr undef -> 0
// undef lshr X -> 0
case Instruction::AShr:
if (!isa<UndefValue>(C2))
return const_cast<Constant*>(C1); // X ashr undef --> X
case Instruction::Shl:
// undef << X -> 0 or X << undef -> 0
- return Constant::getNullValue(C1->getType());
+ return Context.getNullValue(C1->getType());
}
}
- // Handle simplifications of the RHS when a constant int.
+ // Handle simplifications when the RHS is a constant int.
if (const ConstantInt *CI2 = dyn_cast<ConstantInt>(C2)) {
switch (Opcode) {
case Instruction::Add:
case Instruction::SDiv:
if (CI2->equalsInt(1))
return const_cast<Constant*>(C1); // X / 1 == X
+ if (CI2->equalsInt(0))
+ return Context.getUndef(CI2->getType()); // X / 0 == undef
break;
case Instruction::URem:
case Instruction::SRem:
if (CI2->equalsInt(1))
- return Constant::getNullValue(CI2->getType()); // X % 1 == 0
+ return Context.getNullValue(CI2->getType()); // X % 1 == 0
+ if (CI2->equalsInt(0))
+ return Context.getUndef(CI2->getType()); // X % 0 == undef
break;
case Instruction::And:
if (CI2->isZero()) return const_cast<Constant*>(C2); // X & 0 == 0
// If checking bits we know are clear, return zero.
if ((CI2->getValue() & BitsNotSet) == CI2->getValue())
- return Constant::getNullValue(CI2->getType());
+ return Context.getNullValue(CI2->getType());
}
}
}
// ashr (zext C to Ty), C2 -> lshr (zext C, CSA), C2
if (const ConstantExpr *CE1 = dyn_cast<ConstantExpr>(C1))
if (CE1->getOpcode() == Instruction::ZExt) // Top bits known zero.
- return ConstantExpr::getLShr(const_cast<Constant*>(C1),
- const_cast<Constant*>(C2));
+ return Context.getConstantExprLShr(const_cast<Constant*>(C1),
+ const_cast<Constant*>(C2));
break;
}
}
default:
break;
case Instruction::Add:
- return ConstantInt::get(C1V + C2V);
+ return ConstantInt::get(Context, C1V + C2V);
case Instruction::Sub:
- return ConstantInt::get(C1V - C2V);
+ return ConstantInt::get(Context, C1V - C2V);
case Instruction::Mul:
- return ConstantInt::get(C1V * C2V);
+ return ConstantInt::get(Context, C1V * C2V);
case Instruction::UDiv:
- if (CI2->isNullValue())
- return 0; // X / 0 -> can't fold
- return ConstantInt::get(C1V.udiv(C2V));
+ assert(!CI2->isNullValue() && "Div by zero handled above");
+ return ConstantInt::get(Context, C1V.udiv(C2V));
case Instruction::SDiv:
- if (CI2->isNullValue())
- return 0; // X / 0 -> can't fold
+ assert(!CI2->isNullValue() && "Div by zero handled above");
if (C2V.isAllOnesValue() && C1V.isMinSignedValue())
- return 0; // MIN_INT / -1 -> overflow
- return ConstantInt::get(C1V.sdiv(C2V));
+ return Context.getUndef(CI1->getType()); // MIN_INT / -1 -> undef
+ return ConstantInt::get(Context, C1V.sdiv(C2V));
case Instruction::URem:
- if (C2->isNullValue())
- return 0; // X / 0 -> can't fold
- return ConstantInt::get(C1V.urem(C2V));
- case Instruction::SRem:
- if (CI2->isNullValue())
- return 0; // X % 0 -> can't fold
+ assert(!CI2->isNullValue() && "Div by zero handled above");
+ return ConstantInt::get(Context, C1V.urem(C2V));
+ case Instruction::SRem:
+ assert(!CI2->isNullValue() && "Div by zero handled above");
if (C2V.isAllOnesValue() && C1V.isMinSignedValue())
- return 0; // MIN_INT % -1 -> overflow
- return ConstantInt::get(C1V.srem(C2V));
+ return Context.getUndef(CI1->getType()); // MIN_INT % -1 -> undef
+ return ConstantInt::get(Context, C1V.srem(C2V));
case Instruction::And:
- return ConstantInt::get(C1V & C2V);
+ return ConstantInt::get(Context, C1V & C2V);
case Instruction::Or:
- return ConstantInt::get(C1V | C2V);
+ return ConstantInt::get(Context, C1V | C2V);
case Instruction::Xor:
- return ConstantInt::get(C1V ^ C2V);
+ return ConstantInt::get(Context, C1V ^ C2V);
case Instruction::Shl: {
uint32_t shiftAmt = C2V.getZExtValue();
if (shiftAmt < C1V.getBitWidth())
- return ConstantInt::get(C1V.shl(shiftAmt));
+ return ConstantInt::get(Context, C1V.shl(shiftAmt));
else
- return UndefValue::get(C1->getType()); // too big shift is undef
+ return Context.getUndef(C1->getType()); // too big shift is undef
}
case Instruction::LShr: {
uint32_t shiftAmt = C2V.getZExtValue();
if (shiftAmt < C1V.getBitWidth())
- return ConstantInt::get(C1V.lshr(shiftAmt));
+ return ConstantInt::get(Context, C1V.lshr(shiftAmt));
else
- return UndefValue::get(C1->getType()); // too big shift is undef
+ return Context.getUndef(C1->getType()); // too big shift is undef
}
case Instruction::AShr: {
uint32_t shiftAmt = C2V.getZExtValue();
if (shiftAmt < C1V.getBitWidth())
- return ConstantInt::get(C1V.ashr(shiftAmt));
+ return ConstantInt::get(Context, C1V.ashr(shiftAmt));
else
- return UndefValue::get(C1->getType()); // too big shift is undef
+ return Context.getUndef(C1->getType()); // too big shift is undef
}
}
}
+
+ switch (Opcode) {
+ case Instruction::SDiv:
+ case Instruction::UDiv:
+ case Instruction::URem:
+ case Instruction::SRem:
+ case Instruction::LShr:
+ case Instruction::AShr:
+ case Instruction::Shl:
+ if (CI1->equalsInt(0)) return const_cast<Constant*>(C1);
+ break;
+ default:
+ break;
+ }
} else if (const ConstantFP *CFP1 = dyn_cast<ConstantFP>(C1)) {
if (const ConstantFP *CFP2 = dyn_cast<ConstantFP>(C2)) {
APFloat C1V = CFP1->getValueAPF();
switch (Opcode) {
default:
break;
- case Instruction::Add:
+ case Instruction::FAdd:
(void)C3V.add(C2V, APFloat::rmNearestTiesToEven);
- return ConstantFP::get(C3V);
- case Instruction::Sub:
+ return ConstantFP::get(Context, C3V);
+ case Instruction::FSub:
(void)C3V.subtract(C2V, APFloat::rmNearestTiesToEven);
- return ConstantFP::get(C3V);
- case Instruction::Mul:
+ return ConstantFP::get(Context, C3V);
+ case Instruction::FMul:
(void)C3V.multiply(C2V, APFloat::rmNearestTiesToEven);
- return ConstantFP::get(C3V);
+ return ConstantFP::get(Context, C3V);
case Instruction::FDiv:
(void)C3V.divide(C2V, APFloat::rmNearestTiesToEven);
- return ConstantFP::get(C3V);
+ return ConstantFP::get(Context, C3V);
case Instruction::FRem:
- if (C2V.isZero()) {
- // IEEE 754, Section 7.1, #5
- if (CFP1->getType() == Type::DoubleTy)
- return ConstantFP::get(APFloat(std::numeric_limits<double>::
- quiet_NaN()));
- if (CFP1->getType() == Type::FloatTy)
- return ConstantFP::get(APFloat(std::numeric_limits<float>::
- quiet_NaN()));
- break;
- }
(void)C3V.mod(C2V, APFloat::rmNearestTiesToEven);
- return ConstantFP::get(C3V);
+ return ConstantFP::get(Context, C3V);
}
}
} else if (const VectorType *VTy = dyn_cast<VectorType>(C1->getType())) {
const ConstantVector *CP2 = dyn_cast<ConstantVector>(C2);
if ((CP1 != NULL || isa<ConstantAggregateZero>(C1)) &&
(CP2 != NULL || isa<ConstantAggregateZero>(C2))) {
+ std::vector<Constant*> Res;
+ const Type* EltTy = VTy->getElementType();
+ const Constant *C1 = 0;
+ const Constant *C2 = 0;
switch (Opcode) {
default:
break;
- case Instruction::Add:
- return EvalVectorOp(CP1, CP2, VTy, ConstantExpr::getAdd);
- case Instruction::Sub:
- return EvalVectorOp(CP1, CP2, VTy, ConstantExpr::getSub);
- case Instruction::Mul:
- return EvalVectorOp(CP1, CP2, VTy, ConstantExpr::getMul);
+ case Instruction::Add:
+ for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
+ C1 = CP1 ? CP1->getOperand(i) : Context.getNullValue(EltTy);
+ C2 = CP2 ? CP2->getOperand(i) : Context.getNullValue(EltTy);
+ Res.push_back(Context.getConstantExprAdd(const_cast<Constant*>(C1),
+ const_cast<Constant*>(C2)));
+ }
+ return ConstantVector::get(Res);
+ case Instruction::FAdd:
+ for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
+ C1 = CP1 ? CP1->getOperand(i) : Context.getNullValue(EltTy);
+ C2 = CP2 ? CP2->getOperand(i) : Context.getNullValue(EltTy);
+ Res.push_back(Context.getConstantExprFAdd(const_cast<Constant*>(C1),
+ const_cast<Constant*>(C2)));
+ }
+ return ConstantVector::get(Res);
+ case Instruction::Sub:
+ for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
+ C1 = CP1 ? CP1->getOperand(i) : Context.getNullValue(EltTy);
+ C2 = CP2 ? CP2->getOperand(i) : Context.getNullValue(EltTy);
+ Res.push_back(Context.getConstantExprSub(const_cast<Constant*>(C1),
+ const_cast<Constant*>(C2)));
+ }
+ return ConstantVector::get(Res);
+ case Instruction::FSub:
+ for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
+ C1 = CP1 ? CP1->getOperand(i) : Context.getNullValue(EltTy);
+ C2 = CP2 ? CP2->getOperand(i) : Context.getNullValue(EltTy);
+ Res.push_back(Context.getConstantExprFSub(const_cast<Constant*>(C1),
+ const_cast<Constant*>(C2)));
+ }
+ return ConstantVector::get(Res);
+ case Instruction::Mul:
+ for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
+ C1 = CP1 ? CP1->getOperand(i) : Context.getNullValue(EltTy);
+ C2 = CP2 ? CP2->getOperand(i) : Context.getNullValue(EltTy);
+ Res.push_back(Context.getConstantExprMul(const_cast<Constant*>(C1),
+ const_cast<Constant*>(C2)));
+ }
+ return ConstantVector::get(Res);
+ case Instruction::FMul:
+ for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
+ C1 = CP1 ? CP1->getOperand(i) : Context.getNullValue(EltTy);
+ C2 = CP2 ? CP2->getOperand(i) : Context.getNullValue(EltTy);
+ Res.push_back(Context.getConstantExprFMul(const_cast<Constant*>(C1),
+ const_cast<Constant*>(C2)));
+ }
+ return ConstantVector::get(Res);
case Instruction::UDiv:
- return EvalVectorOp(CP1, CP2, VTy, ConstantExpr::getUDiv);
+ for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
+ C1 = CP1 ? CP1->getOperand(i) : Context.getNullValue(EltTy);
+ C2 = CP2 ? CP2->getOperand(i) : Context.getNullValue(EltTy);
+ Res.push_back(Context.getConstantExprUDiv(const_cast<Constant*>(C1),
+ const_cast<Constant*>(C2)));
+ }
+ return ConstantVector::get(Res);
case Instruction::SDiv:
- return EvalVectorOp(CP1, CP2, VTy, ConstantExpr::getSDiv);
+ for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
+ C1 = CP1 ? CP1->getOperand(i) : Context.getNullValue(EltTy);
+ C2 = CP2 ? CP2->getOperand(i) : Context.getNullValue(EltTy);
+ Res.push_back(Context.getConstantExprSDiv(const_cast<Constant*>(C1),
+ const_cast<Constant*>(C2)));
+ }
+ return ConstantVector::get(Res);
case Instruction::FDiv:
- return EvalVectorOp(CP1, CP2, VTy, ConstantExpr::getFDiv);
+ for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
+ C1 = CP1 ? CP1->getOperand(i) : Context.getNullValue(EltTy);
+ C2 = CP2 ? CP2->getOperand(i) : Context.getNullValue(EltTy);
+ Res.push_back(Context.getConstantExprFDiv(const_cast<Constant*>(C1),
+ const_cast<Constant*>(C2)));
+ }
+ return ConstantVector::get(Res);
case Instruction::URem:
- return EvalVectorOp(CP1, CP2, VTy, ConstantExpr::getURem);
+ for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
+ C1 = CP1 ? CP1->getOperand(i) : Context.getNullValue(EltTy);
+ C2 = CP2 ? CP2->getOperand(i) : Context.getNullValue(EltTy);
+ Res.push_back(Context.getConstantExprURem(const_cast<Constant*>(C1),
+ const_cast<Constant*>(C2)));
+ }
+ return ConstantVector::get(Res);
case Instruction::SRem:
- return EvalVectorOp(CP1, CP2, VTy, ConstantExpr::getSRem);
+ for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
+ C1 = CP1 ? CP1->getOperand(i) : Context.getNullValue(EltTy);
+ C2 = CP2 ? CP2->getOperand(i) : Context.getNullValue(EltTy);
+ Res.push_back(Context.getConstantExprSRem(const_cast<Constant*>(C1),
+ const_cast<Constant*>(C2)));
+ }
+ return ConstantVector::get(Res);
case Instruction::FRem:
- return EvalVectorOp(CP1, CP2, VTy, ConstantExpr::getFRem);
+ for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
+ C1 = CP1 ? CP1->getOperand(i) : Context.getNullValue(EltTy);
+ C2 = CP2 ? CP2->getOperand(i) : Context.getNullValue(EltTy);
+ Res.push_back(Context.getConstantExprFRem(const_cast<Constant*>(C1),
+ const_cast<Constant*>(C2)));
+ }
+ return ConstantVector::get(Res);
case Instruction::And:
- return EvalVectorOp(CP1, CP2, VTy, ConstantExpr::getAnd);
- case Instruction::Or:
- return EvalVectorOp(CP1, CP2, VTy, ConstantExpr::getOr);
- case Instruction::Xor:
- return EvalVectorOp(CP1, CP2, VTy, ConstantExpr::getXor);
+ for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
+ C1 = CP1 ? CP1->getOperand(i) : Context.getNullValue(EltTy);
+ C2 = CP2 ? CP2->getOperand(i) : Context.getNullValue(EltTy);
+ Res.push_back(Context.getConstantExprAnd(const_cast<Constant*>(C1),
+ const_cast<Constant*>(C2)));
+ }
+ return ConstantVector::get(Res);
+ case Instruction::Or:
+ for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
+ C1 = CP1 ? CP1->getOperand(i) : Context.getNullValue(EltTy);
+ C2 = CP2 ? CP2->getOperand(i) : Context.getNullValue(EltTy);
+ Res.push_back(Context.getConstantExprOr(const_cast<Constant*>(C1),
+ const_cast<Constant*>(C2)));
+ }
+ return ConstantVector::get(Res);
+ case Instruction::Xor:
+ for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
+ C1 = CP1 ? CP1->getOperand(i) : Context.getNullValue(EltTy);
+ C2 = CP2 ? CP2->getOperand(i) : Context.getNullValue(EltTy);
+ Res.push_back(Context.getConstantExprXor(const_cast<Constant*>(C1),
+ const_cast<Constant*>(C2)));
+ }
+ return ConstantVector::get(Res);
+ case Instruction::LShr:
+ for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
+ C1 = CP1 ? CP1->getOperand(i) : Context.getNullValue(EltTy);
+ C2 = CP2 ? CP2->getOperand(i) : Context.getNullValue(EltTy);
+ Res.push_back(Context.getConstantExprLShr(const_cast<Constant*>(C1),
+ const_cast<Constant*>(C2)));
+ }
+ return ConstantVector::get(Res);
+ case Instruction::AShr:
+ for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
+ C1 = CP1 ? CP1->getOperand(i) : Context.getNullValue(EltTy);
+ C2 = CP2 ? CP2->getOperand(i) : Context.getNullValue(EltTy);
+ Res.push_back(Context.getConstantExprAShr(const_cast<Constant*>(C1),
+ const_cast<Constant*>(C2)));
+ }
+ return ConstantVector::get(Res);
+ case Instruction::Shl:
+ for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
+ C1 = CP1 ? CP1->getOperand(i) : Context.getNullValue(EltTy);
+ C2 = CP2 ? CP2->getOperand(i) : Context.getNullValue(EltTy);
+ Res.push_back(Context.getConstantExprShl(const_cast<Constant*>(C1),
+ const_cast<Constant*>(C2)));
+ }
+ return ConstantVector::get(Res);
}
}
}
// other way if possible.
switch (Opcode) {
case Instruction::Add:
+ case Instruction::FAdd:
case Instruction::Mul:
+ case Instruction::FMul:
case Instruction::And:
case Instruction::Or:
case Instruction::Xor:
// No change of opcode required.
- return ConstantFoldBinaryInstruction(Opcode, C2, C1);
+ return ConstantFoldBinaryInstruction(Context, Opcode, C2, C1);
case Instruction::Shl:
case Instruction::LShr:
case Instruction::AShr:
case Instruction::Sub:
+ case Instruction::FSub:
case Instruction::SDiv:
case Instruction::UDiv:
case Instruction::FDiv:
/// first is less than the second, return -1, if the second is less than the
/// first, return 1. If the constants are not integral, return -2.
///
-static int IdxCompare(Constant *C1, Constant *C2, const Type *ElTy) {
+static int IdxCompare(LLVMContext &Context, Constant *C1, Constant *C2,
+ const Type *ElTy) {
if (C1 == C2) return 0;
// Ok, we found a different index. If they are not ConstantInt, we can't do
// Ok, we have two differing integer indices. Sign extend them to be the same
// type. Long is always big enough, so we use it.
if (C1->getType() != Type::Int64Ty)
- C1 = ConstantExpr::getSExt(C1, Type::Int64Ty);
+ C1 = Context.getConstantExprSExt(C1, Type::Int64Ty);
if (C2->getType() != Type::Int64Ty)
- C2 = ConstantExpr::getSExt(C2, Type::Int64Ty);
+ C2 = Context.getConstantExprSExt(C2, Type::Int64Ty);
if (C1 == C2) return 0; // They are equal
/// To simplify this code we canonicalize the relation so that the first
/// operand is always the most "complex" of the two. We consider ConstantFP
/// to be the simplest, and ConstantExprs to be the most complex.
-static FCmpInst::Predicate evaluateFCmpRelation(const Constant *V1,
+static FCmpInst::Predicate evaluateFCmpRelation(LLVMContext &Context,
+ const Constant *V1,
const Constant *V2) {
assert(V1->getType() == V2->getType() &&
"Cannot compare values of different types!");
Constant *C1 = const_cast<Constant*>(V1);
Constant *C2 = const_cast<Constant*>(V2);
R = dyn_cast<ConstantInt>(
- ConstantExpr::getFCmp(FCmpInst::FCMP_OEQ, C1, C2));
+ Context.getConstantExprFCmp(FCmpInst::FCMP_OEQ, C1, C2));
if (R && !R->isZero())
return FCmpInst::FCMP_OEQ;
R = dyn_cast<ConstantInt>(
- ConstantExpr::getFCmp(FCmpInst::FCMP_OLT, C1, C2));
+ Context.getConstantExprFCmp(FCmpInst::FCMP_OLT, C1, C2));
if (R && !R->isZero())
return FCmpInst::FCMP_OLT;
R = dyn_cast<ConstantInt>(
- ConstantExpr::getFCmp(FCmpInst::FCMP_OGT, C1, C2));
+ Context.getConstantExprFCmp(FCmpInst::FCMP_OGT, C1, C2));
if (R && !R->isZero())
return FCmpInst::FCMP_OGT;
}
// If the first operand is simple and second is ConstantExpr, swap operands.
- FCmpInst::Predicate SwappedRelation = evaluateFCmpRelation(V2, V1);
+ FCmpInst::Predicate SwappedRelation = evaluateFCmpRelation(Context, V2, V1);
if (SwappedRelation != FCmpInst::BAD_FCMP_PREDICATE)
return FCmpInst::getSwappedPredicate(SwappedRelation);
} else {
/// constants (like ConstantInt) to be the simplest, followed by
/// GlobalValues, followed by ConstantExpr's (the most complex).
///
-static ICmpInst::Predicate evaluateICmpRelation(const Constant *V1,
+static ICmpInst::Predicate evaluateICmpRelation(LLVMContext &Context,
+ const Constant *V1,
const Constant *V2,
bool isSigned) {
assert(V1->getType() == V2->getType() &&
Constant *C1 = const_cast<Constant*>(V1);
Constant *C2 = const_cast<Constant*>(V2);
ICmpInst::Predicate pred = ICmpInst::ICMP_EQ;
- R = dyn_cast<ConstantInt>(ConstantExpr::getICmp(pred, C1, C2));
+ R = dyn_cast<ConstantInt>(Context.getConstantExprICmp(pred, C1, C2));
if (R && !R->isZero())
return pred;
pred = isSigned ? ICmpInst::ICMP_SLT : ICmpInst::ICMP_ULT;
- R = dyn_cast<ConstantInt>(ConstantExpr::getICmp(pred, C1, C2));
+ R = dyn_cast<ConstantInt>(Context.getConstantExprICmp(pred, C1, C2));
if (R && !R->isZero())
return pred;
- pred = isSigned ? ICmpInst::ICMP_SGT : ICmpInst::ICMP_UGT;
- R = dyn_cast<ConstantInt>(ConstantExpr::getICmp(pred, C1, C2));
+ pred = isSigned ? ICmpInst::ICMP_SGT : ICmpInst::ICMP_UGT;
+ R = dyn_cast<ConstantInt>(Context.getConstantExprICmp(pred, C1, C2));
if (R && !R->isZero())
return pred;
// If the first operand is simple, swap operands.
ICmpInst::Predicate SwappedRelation =
- evaluateICmpRelation(V2, V1, isSigned);
+ evaluateICmpRelation(Context, V2, V1, isSigned);
if (SwappedRelation != ICmpInst::BAD_ICMP_PREDICATE)
return ICmpInst::getSwappedPredicate(SwappedRelation);
} else if (const GlobalValue *CPR1 = dyn_cast<GlobalValue>(V1)) {
if (isa<ConstantExpr>(V2)) { // Swap as necessary.
ICmpInst::Predicate SwappedRelation =
- evaluateICmpRelation(V2, V1, isSigned);
+ evaluateICmpRelation(Context, V2, V1, isSigned);
if (SwappedRelation != ICmpInst::BAD_ICMP_PREDICATE)
return ICmpInst::getSwappedPredicate(SwappedRelation);
else
bool sgnd = isSigned;
if (CE1->getOpcode() == Instruction::ZExt) isSigned = false;
if (CE1->getOpcode() == Instruction::SExt) isSigned = true;
- return evaluateICmpRelation(CE1Op0,
- Constant::getNullValue(CE1Op0->getType()),
+ return evaluateICmpRelation(Context, CE1Op0,
+ Context.getNullValue(CE1Op0->getType()),
sgnd);
}
bool sgnd = isSigned;
if (CE1->getOpcode() == Instruction::ZExt) isSigned = false;
if (CE1->getOpcode() == Instruction::SExt) isSigned = true;
- return evaluateICmpRelation(CE1->getOperand(0), CE2->getOperand(0),
- sgnd);
+ return evaluateICmpRelation(Context, CE1->getOperand(0),
+ CE2->getOperand(0), sgnd);
}
break;
gep_type_iterator GTI = gep_type_begin(CE1);
for (;i != CE1->getNumOperands() && i != CE2->getNumOperands();
++i, ++GTI)
- switch (IdxCompare(CE1->getOperand(i), CE2->getOperand(i),
- GTI.getIndexedType())) {
+ switch (IdxCompare(Context, CE1->getOperand(i),
+ CE2->getOperand(i), GTI.getIndexedType())) {
case -1: return isSigned ? ICmpInst::ICMP_SLT:ICmpInst::ICMP_ULT;
case 1: return isSigned ? ICmpInst::ICMP_SGT:ICmpInst::ICMP_UGT;
case -2: return ICmpInst::BAD_ICMP_PREDICATE;
return ICmpInst::BAD_ICMP_PREDICATE;
}
-Constant *llvm::ConstantFoldCompareInstruction(unsigned short pred,
+Constant *llvm::ConstantFoldCompareInstruction(LLVMContext &Context,
+ unsigned short pred,
const Constant *C1,
const Constant *C2) {
+ const Type *ResultTy;
+ if (const VectorType *VT = dyn_cast<VectorType>(C1->getType()))
+ ResultTy = Context.getVectorType(Type::Int1Ty, VT->getNumElements());
+ else
+ ResultTy = Type::Int1Ty;
+
+ // Fold FCMP_FALSE/FCMP_TRUE unconditionally.
+ if (pred == FCmpInst::FCMP_FALSE)
+ return Context.getNullValue(ResultTy);
+
+ if (pred == FCmpInst::FCMP_TRUE)
+ return Context.getAllOnesValue(ResultTy);
// Handle some degenerate cases first
if (isa<UndefValue>(C1) || isa<UndefValue>(C2))
- return UndefValue::get(Type::Int1Ty);
+ return Context.getUndef(ResultTy);
// No compile-time operations on this type yet.
if (C1->getType() == Type::PPC_FP128Ty)
// Don't try to evaluate aliases. External weak GV can be null.
if (!isa<GlobalAlias>(GV) && !GV->hasExternalWeakLinkage()) {
if (pred == ICmpInst::ICMP_EQ)
- return ConstantInt::getFalse();
+ return Context.getFalse();
else if (pred == ICmpInst::ICMP_NE)
- return ConstantInt::getTrue();
+ return Context.getTrue();
}
// icmp eq/ne(GV,null) -> false/true
} else if (C2->isNullValue()) {
// Don't try to evaluate aliases. External weak GV can be null.
if (!isa<GlobalAlias>(GV) && !GV->hasExternalWeakLinkage()) {
if (pred == ICmpInst::ICMP_EQ)
- return ConstantInt::getFalse();
+ return Context.getFalse();
else if (pred == ICmpInst::ICMP_NE)
- return ConstantInt::getTrue();
+ return Context.getTrue();
}
}
APInt V1 = cast<ConstantInt>(C1)->getValue();
APInt V2 = cast<ConstantInt>(C2)->getValue();
switch (pred) {
- default: assert(0 && "Invalid ICmp Predicate"); return 0;
- case ICmpInst::ICMP_EQ: return ConstantInt::get(Type::Int1Ty, V1 == V2);
- case ICmpInst::ICMP_NE: return ConstantInt::get(Type::Int1Ty, V1 != V2);
- case ICmpInst::ICMP_SLT:return ConstantInt::get(Type::Int1Ty, V1.slt(V2));
- case ICmpInst::ICMP_SGT:return ConstantInt::get(Type::Int1Ty, V1.sgt(V2));
- case ICmpInst::ICMP_SLE:return ConstantInt::get(Type::Int1Ty, V1.sle(V2));
- case ICmpInst::ICMP_SGE:return ConstantInt::get(Type::Int1Ty, V1.sge(V2));
- case ICmpInst::ICMP_ULT:return ConstantInt::get(Type::Int1Ty, V1.ult(V2));
- case ICmpInst::ICMP_UGT:return ConstantInt::get(Type::Int1Ty, V1.ugt(V2));
- case ICmpInst::ICMP_ULE:return ConstantInt::get(Type::Int1Ty, V1.ule(V2));
- case ICmpInst::ICMP_UGE:return ConstantInt::get(Type::Int1Ty, V1.uge(V2));
+ default: llvm_unreachable("Invalid ICmp Predicate"); return 0;
+ case ICmpInst::ICMP_EQ:
+ return ConstantInt::get(Type::Int1Ty, V1 == V2);
+ case ICmpInst::ICMP_NE:
+ return ConstantInt::get(Type::Int1Ty, V1 != V2);
+ case ICmpInst::ICMP_SLT:
+ return ConstantInt::get(Type::Int1Ty, V1.slt(V2));
+ case ICmpInst::ICMP_SGT:
+ return ConstantInt::get(Type::Int1Ty, V1.sgt(V2));
+ case ICmpInst::ICMP_SLE:
+ return ConstantInt::get(Type::Int1Ty, V1.sle(V2));
+ case ICmpInst::ICMP_SGE:
+ return ConstantInt::get(Type::Int1Ty, V1.sge(V2));
+ case ICmpInst::ICMP_ULT:
+ return ConstantInt::get(Type::Int1Ty, V1.ult(V2));
+ case ICmpInst::ICMP_UGT:
+ return ConstantInt::get(Type::Int1Ty, V1.ugt(V2));
+ case ICmpInst::ICMP_ULE:
+ return ConstantInt::get(Type::Int1Ty, V1.ule(V2));
+ case ICmpInst::ICMP_UGE:
+ return ConstantInt::get(Type::Int1Ty, V1.uge(V2));
}
} else if (isa<ConstantFP>(C1) && isa<ConstantFP>(C2)) {
APFloat C1V = cast<ConstantFP>(C1)->getValueAPF();
APFloat C2V = cast<ConstantFP>(C2)->getValueAPF();
APFloat::cmpResult R = C1V.compare(C2V);
switch (pred) {
- default: assert(0 && "Invalid FCmp Predicate"); return 0;
- case FCmpInst::FCMP_FALSE: return ConstantInt::getFalse();
- case FCmpInst::FCMP_TRUE: return ConstantInt::getTrue();
+ default: llvm_unreachable("Invalid FCmp Predicate"); return 0;
+ case FCmpInst::FCMP_FALSE: return Context.getFalse();
+ case FCmpInst::FCMP_TRUE: return Context.getTrue();
case FCmpInst::FCMP_UNO:
return ConstantInt::get(Type::Int1Ty, R==APFloat::cmpUnordered);
case FCmpInst::FCMP_ORD:
return ConstantInt::get(Type::Int1Ty, R==APFloat::cmpGreaterThan ||
R==APFloat::cmpEqual);
}
- } else if (const ConstantVector *CP1 = dyn_cast<ConstantVector>(C1)) {
- if (const ConstantVector *CP2 = dyn_cast<ConstantVector>(C2)) {
- if (pred == FCmpInst::FCMP_OEQ || pred == FCmpInst::FCMP_UEQ) {
- for (unsigned i = 0, e = CP1->getNumOperands(); i != e; ++i) {
- Constant *C = ConstantExpr::getFCmp(FCmpInst::FCMP_OEQ,
- CP1->getOperand(i),
- CP2->getOperand(i));
- if (ConstantInt *CB = dyn_cast<ConstantInt>(C))
- return CB;
- }
- // Otherwise, could not decide from any element pairs.
- return 0;
- } else if (pred == ICmpInst::ICMP_EQ) {
- for (unsigned i = 0, e = CP1->getNumOperands(); i != e; ++i) {
- Constant *C = ConstantExpr::getICmp(ICmpInst::ICMP_EQ,
- CP1->getOperand(i),
- CP2->getOperand(i));
- if (ConstantInt *CB = dyn_cast<ConstantInt>(C))
- return CB;
- }
- // Otherwise, could not decide from any element pairs.
- return 0;
- }
+ } else if (isa<VectorType>(C1->getType())) {
+ SmallVector<Constant*, 16> C1Elts, C2Elts;
+ C1->getVectorElements(Context, C1Elts);
+ C2->getVectorElements(Context, C2Elts);
+
+ // If we can constant fold the comparison of each element, constant fold
+ // the whole vector comparison.
+ SmallVector<Constant*, 4> ResElts;
+ for (unsigned i = 0, e = C1Elts.size(); i != e; ++i) {
+ // Compare the elements, producing an i1 result or constant expr.
+ ResElts.push_back(
+ Context.getConstantExprCompare(pred, C1Elts[i], C2Elts[i]));
}
+ return ConstantVector::get(&ResElts[0], ResElts.size());
}
if (C1->getType()->isFloatingPoint()) {
- switch (evaluateFCmpRelation(C1, C2)) {
- default: assert(0 && "Unknown relation!");
+ int Result = -1; // -1 = unknown, 0 = known false, 1 = known true.
+ switch (evaluateFCmpRelation(Context, C1, C2)) {
+ default: llvm_unreachable("Unknown relation!");
case FCmpInst::FCMP_UNO:
case FCmpInst::FCMP_ORD:
case FCmpInst::FCMP_UEQ:
case FCmpInst::BAD_FCMP_PREDICATE:
break; // Couldn't determine anything about these constants.
case FCmpInst::FCMP_OEQ: // We know that C1 == C2
- return ConstantInt::get(Type::Int1Ty,
- pred == FCmpInst::FCMP_UEQ || pred == FCmpInst::FCMP_OEQ ||
- pred == FCmpInst::FCMP_ULE || pred == FCmpInst::FCMP_OLE ||
- pred == FCmpInst::FCMP_UGE || pred == FCmpInst::FCMP_OGE);
+ Result = (pred == FCmpInst::FCMP_UEQ || pred == FCmpInst::FCMP_OEQ ||
+ pred == FCmpInst::FCMP_ULE || pred == FCmpInst::FCMP_OLE ||
+ pred == FCmpInst::FCMP_UGE || pred == FCmpInst::FCMP_OGE);
+ break;
case FCmpInst::FCMP_OLT: // We know that C1 < C2
- return ConstantInt::get(Type::Int1Ty,
- pred == FCmpInst::FCMP_UNE || pred == FCmpInst::FCMP_ONE ||
- pred == FCmpInst::FCMP_ULT || pred == FCmpInst::FCMP_OLT ||
- pred == FCmpInst::FCMP_ULE || pred == FCmpInst::FCMP_OLE);
+ Result = (pred == FCmpInst::FCMP_UNE || pred == FCmpInst::FCMP_ONE ||
+ pred == FCmpInst::FCMP_ULT || pred == FCmpInst::FCMP_OLT ||
+ pred == FCmpInst::FCMP_ULE || pred == FCmpInst::FCMP_OLE);
+ break;
case FCmpInst::FCMP_OGT: // We know that C1 > C2
- return ConstantInt::get(Type::Int1Ty,
- pred == FCmpInst::FCMP_UNE || pred == FCmpInst::FCMP_ONE ||
- pred == FCmpInst::FCMP_UGT || pred == FCmpInst::FCMP_OGT ||
- pred == FCmpInst::FCMP_UGE || pred == FCmpInst::FCMP_OGE);
+ Result = (pred == FCmpInst::FCMP_UNE || pred == FCmpInst::FCMP_ONE ||
+ pred == FCmpInst::FCMP_UGT || pred == FCmpInst::FCMP_OGT ||
+ pred == FCmpInst::FCMP_UGE || pred == FCmpInst::FCMP_OGE);
+ break;
case FCmpInst::FCMP_OLE: // We know that C1 <= C2
// We can only partially decide this relation.
if (pred == FCmpInst::FCMP_UGT || pred == FCmpInst::FCMP_OGT)
- return ConstantInt::getFalse();
- if (pred == FCmpInst::FCMP_ULT || pred == FCmpInst::FCMP_OLT)
- return ConstantInt::getTrue();
+ Result = 0;
+ else if (pred == FCmpInst::FCMP_ULT || pred == FCmpInst::FCMP_OLT)
+ Result = 1;
break;
case FCmpInst::FCMP_OGE: // We known that C1 >= C2
// We can only partially decide this relation.
if (pred == FCmpInst::FCMP_ULT || pred == FCmpInst::FCMP_OLT)
- return ConstantInt::getFalse();
- if (pred == FCmpInst::FCMP_UGT || pred == FCmpInst::FCMP_OGT)
- return ConstantInt::getTrue();
+ Result = 0;
+ else if (pred == FCmpInst::FCMP_UGT || pred == FCmpInst::FCMP_OGT)
+ Result = 1;
break;
case ICmpInst::ICMP_NE: // We know that C1 != C2
// We can only partially decide this relation.
if (pred == FCmpInst::FCMP_OEQ || pred == FCmpInst::FCMP_UEQ)
- return ConstantInt::getFalse();
- if (pred == FCmpInst::FCMP_ONE || pred == FCmpInst::FCMP_UNE)
- return ConstantInt::getTrue();
+ Result = 0;
+ else if (pred == FCmpInst::FCMP_ONE || pred == FCmpInst::FCMP_UNE)
+ Result = 1;
break;
}
+
+ // If we evaluated the result, return it now.
+ if (Result != -1)
+ return ConstantInt::get(Type::Int1Ty, Result);
+
} else {
// Evaluate the relation between the two constants, per the predicate.
- switch (evaluateICmpRelation(C1, C2, CmpInst::isSigned(pred))) {
- default: assert(0 && "Unknown relational!");
+ int Result = -1; // -1 = unknown, 0 = known false, 1 = known true.
+ switch (evaluateICmpRelation(Context, C1, C2, CmpInst::isSigned(pred))) {
+ default: llvm_unreachable("Unknown relational!");
case ICmpInst::BAD_ICMP_PREDICATE:
break; // Couldn't determine anything about these constants.
case ICmpInst::ICMP_EQ: // We know the constants are equal!
// If we know the constants are equal, we can decide the result of this
// computation precisely.
- return ConstantInt::get(Type::Int1Ty,
- pred == ICmpInst::ICMP_EQ ||
- pred == ICmpInst::ICMP_ULE ||
- pred == ICmpInst::ICMP_SLE ||
- pred == ICmpInst::ICMP_UGE ||
- pred == ICmpInst::ICMP_SGE);
+ Result = (pred == ICmpInst::ICMP_EQ ||
+ pred == ICmpInst::ICMP_ULE ||
+ pred == ICmpInst::ICMP_SLE ||
+ pred == ICmpInst::ICMP_UGE ||
+ pred == ICmpInst::ICMP_SGE);
+ break;
case ICmpInst::ICMP_ULT:
// If we know that C1 < C2, we can decide the result of this computation
// precisely.
- return ConstantInt::get(Type::Int1Ty,
- pred == ICmpInst::ICMP_ULT ||
- pred == ICmpInst::ICMP_NE ||
- pred == ICmpInst::ICMP_ULE);
+ Result = (pred == ICmpInst::ICMP_ULT ||
+ pred == ICmpInst::ICMP_NE ||
+ pred == ICmpInst::ICMP_ULE);
+ break;
case ICmpInst::ICMP_SLT:
// If we know that C1 < C2, we can decide the result of this computation
// precisely.
- return ConstantInt::get(Type::Int1Ty,
- pred == ICmpInst::ICMP_SLT ||
- pred == ICmpInst::ICMP_NE ||
- pred == ICmpInst::ICMP_SLE);
+ Result = (pred == ICmpInst::ICMP_SLT ||
+ pred == ICmpInst::ICMP_NE ||
+ pred == ICmpInst::ICMP_SLE);
+ break;
case ICmpInst::ICMP_UGT:
// If we know that C1 > C2, we can decide the result of this computation
// precisely.
- return ConstantInt::get(Type::Int1Ty,
- pred == ICmpInst::ICMP_UGT ||
- pred == ICmpInst::ICMP_NE ||
- pred == ICmpInst::ICMP_UGE);
+ Result = (pred == ICmpInst::ICMP_UGT ||
+ pred == ICmpInst::ICMP_NE ||
+ pred == ICmpInst::ICMP_UGE);
+ break;
case ICmpInst::ICMP_SGT:
// If we know that C1 > C2, we can decide the result of this computation
// precisely.
- return ConstantInt::get(Type::Int1Ty,
- pred == ICmpInst::ICMP_SGT ||
- pred == ICmpInst::ICMP_NE ||
- pred == ICmpInst::ICMP_SGE);
+ Result = (pred == ICmpInst::ICMP_SGT ||
+ pred == ICmpInst::ICMP_NE ||
+ pred == ICmpInst::ICMP_SGE);
+ break;
case ICmpInst::ICMP_ULE:
// If we know that C1 <= C2, we can only partially decide this relation.
- if (pred == ICmpInst::ICMP_UGT) return ConstantInt::getFalse();
- if (pred == ICmpInst::ICMP_ULT) return ConstantInt::getTrue();
+ if (pred == ICmpInst::ICMP_UGT) Result = 0;
+ if (pred == ICmpInst::ICMP_ULT) Result = 1;
break;
case ICmpInst::ICMP_SLE:
// If we know that C1 <= C2, we can only partially decide this relation.
- if (pred == ICmpInst::ICMP_SGT) return ConstantInt::getFalse();
- if (pred == ICmpInst::ICMP_SLT) return ConstantInt::getTrue();
+ if (pred == ICmpInst::ICMP_SGT) Result = 0;
+ if (pred == ICmpInst::ICMP_SLT) Result = 1;
break;
case ICmpInst::ICMP_UGE:
// If we know that C1 >= C2, we can only partially decide this relation.
- if (pred == ICmpInst::ICMP_ULT) return ConstantInt::getFalse();
- if (pred == ICmpInst::ICMP_UGT) return ConstantInt::getTrue();
+ if (pred == ICmpInst::ICMP_ULT) Result = 0;
+ if (pred == ICmpInst::ICMP_UGT) Result = 1;
break;
case ICmpInst::ICMP_SGE:
// If we know that C1 >= C2, we can only partially decide this relation.
- if (pred == ICmpInst::ICMP_SLT) return ConstantInt::getFalse();
- if (pred == ICmpInst::ICMP_SGT) return ConstantInt::getTrue();
+ if (pred == ICmpInst::ICMP_SLT) Result = 0;
+ if (pred == ICmpInst::ICMP_SGT) Result = 1;
break;
case ICmpInst::ICMP_NE:
// If we know that C1 != C2, we can only partially decide this relation.
- if (pred == ICmpInst::ICMP_EQ) return ConstantInt::getFalse();
- if (pred == ICmpInst::ICMP_NE) return ConstantInt::getTrue();
+ if (pred == ICmpInst::ICMP_EQ) Result = 0;
+ if (pred == ICmpInst::ICMP_NE) Result = 1;
break;
}
-
+
+ // If we evaluated the result, return it now.
+ if (Result != -1)
+ return ConstantInt::get(Type::Int1Ty, Result);
+
if (!isa<ConstantExpr>(C1) && isa<ConstantExpr>(C2)) {
- // If C2 is a constant expr and C1 isn't, flop them around and fold the
+ // If C2 is a constant expr and C1 isn't, flip them around and fold the
// other way if possible.
switch (pred) {
case ICmpInst::ICMP_EQ:
case ICmpInst::ICMP_NE:
// No change of predicate required.
- return ConstantFoldCompareInstruction(pred, C2, C1);
+ return ConstantFoldCompareInstruction(Context, pred, C2, C1);
case ICmpInst::ICMP_ULT:
case ICmpInst::ICMP_SLT:
case ICmpInst::ICMP_SGE:
// Change the predicate as necessary to swap the operands.
pred = ICmpInst::getSwappedPredicate((ICmpInst::Predicate)pred);
- return ConstantFoldCompareInstruction(pred, C2, C1);
+ return ConstantFoldCompareInstruction(Context, pred, C2, C1);
default: // These predicates cannot be flopped around.
break;
}
}
return 0;
-}
+ }
-Constant *llvm::ConstantFoldGetElementPtr(const Constant *C,
+Constant *llvm::ConstantFoldGetElementPtr(LLVMContext &Context,
+ const Constant *C,
Constant* const *Idxs,
unsigned NumIdx) {
if (NumIdx == 0 ||
(Value **)Idxs,
(Value **)Idxs+NumIdx);
assert(Ty != 0 && "Invalid indices for GEP!");
- return UndefValue::get(PointerType::get(Ty, Ptr->getAddressSpace()));
+ return Context.getUndef(Context.getPointerType(Ty, Ptr->getAddressSpace()));
}
Constant *Idx0 = Idxs[0];
(Value**)Idxs,
(Value**)Idxs+NumIdx);
assert(Ty != 0 && "Invalid indices for GEP!");
- return
- ConstantPointerNull::get(PointerType::get(Ty,Ptr->getAddressSpace()));
+ return Context.getConstantPointerNull(
+ Context.getPointerType(Ty,Ptr->getAddressSpace()));
}
}
if (!Idx0->isNullValue()) {
const Type *IdxTy = Combined->getType();
if (IdxTy != Idx0->getType()) {
- Constant *C1 = ConstantExpr::getSExtOrBitCast(Idx0, Type::Int64Ty);
- Constant *C2 = ConstantExpr::getSExtOrBitCast(Combined,
+ Constant *C1 =
+ Context.getConstantExprSExtOrBitCast(Idx0, Type::Int64Ty);
+ Constant *C2 = Context.getConstantExprSExtOrBitCast(Combined,
Type::Int64Ty);
- Combined = ConstantExpr::get(Instruction::Add, C1, C2);
+ Combined = Context.getConstantExpr(Instruction::Add, C1, C2);
} else {
Combined =
- ConstantExpr::get(Instruction::Add, Idx0, Combined);
+ Context.getConstantExpr(Instruction::Add, Idx0, Combined);
}
}
NewIndices.push_back(Combined);
NewIndices.insert(NewIndices.end(), Idxs+1, Idxs+NumIdx);
- return ConstantExpr::getGetElementPtr(CE->getOperand(0), &NewIndices[0],
+ return Context.getConstantExprGetElementPtr(CE->getOperand(0),
+ &NewIndices[0],
NewIndices.size());
}
}
if (const ArrayType *CAT =
dyn_cast<ArrayType>(cast<PointerType>(C->getType())->getElementType()))
if (CAT->getElementType() == SAT->getElementType())
- return ConstantExpr::getGetElementPtr(
+ return Context.getConstantExprGetElementPtr(
(Constant*)CE->getOperand(0), Idxs, NumIdx);
}
// Convert the smaller integer to the larger type.
if (Offset->getType()->getPrimitiveSizeInBits() <
Base->getType()->getPrimitiveSizeInBits())
- Offset = ConstantExpr::getSExt(Offset, Base->getType());
+ Offset = Context.getConstantExprSExt(Offset, Base->getType());
else if (Base->getType()->getPrimitiveSizeInBits() <
Offset->getType()->getPrimitiveSizeInBits())
- Base = ConstantExpr::getZExt(Base, Base->getType());
+ Base = Context.getConstantExprZExt(Base, Offset->getType());
- Base = ConstantExpr::getAdd(Base, Offset);
- return ConstantExpr::getIntToPtr(Base, CE->getType());
+ Base = Context.getConstantExprAdd(Base, Offset);
+ return Context.getConstantExprIntToPtr(Base, CE->getType());
}
}
return 0;
projects / oota-llvm.git / blobdiff