// ConstantExpr::get* methods to automatically fold constants when possible.
//
// The current constant folding implementation is implemented in two pieces: the
-// pieces that don't need TargetData, and the pieces that do. This is to avoid
+// pieces that don't need DataLayout, and the pieces that do. This is to avoid
// a dependence in VMCore on Target.
//
//===----------------------------------------------------------------------===//
#include "ConstantFold.h"
+#include "llvm/ADT/SmallVector.h"
#include "llvm/Constants.h"
-#include "llvm/Instructions.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Function.h"
#include "llvm/GlobalAlias.h"
#include "llvm/GlobalVariable.h"
+#include "llvm/Instructions.h"
#include "llvm/Operator.h"
-#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/GetElementPtrTypeIterator.h"
// ConstantFold*Instruction Implementations
//===----------------------------------------------------------------------===//
-/// BitCastConstantVector - Convert the specified ConstantVector node to the
+/// BitCastConstantVector - Convert the specified vector Constant 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,
- VectorType *DstTy) {
+static Constant *BitCastConstantVector(Constant *CV, VectorType *DstTy) {
if (CV->isAllOnesValue()) return Constant::getAllOnesValue(DstTy);
if (CV->isNullValue()) return Constant::getNullValue(DstTy);
// doing so requires endianness information. This should be handled by
// Analysis/ConstantFolding.cpp
unsigned NumElts = DstTy->getNumElements();
- if (NumElts != CV->getNumOperands())
+ if (NumElts != CV->getType()->getVectorNumElements())
return 0;
+
+ Type *DstEltTy = DstTy->getElementType();
- // Check to verify that all elements of the input are simple.
+ SmallVector<Constant*, 16> Result;
+ Type *Ty = IntegerType::get(CV->getContext(), 32);
for (unsigned i = 0; i != NumElts; ++i) {
- if (!isa<ConstantInt>(CV->getOperand(i)) &&
- !isa<ConstantFP>(CV->getOperand(i)))
- return 0;
+ Constant *C =
+ ConstantExpr::getExtractElement(CV, ConstantInt::get(Ty, i));
+ C = ConstantExpr::getBitCast(C, DstEltTy);
+ Result.push_back(C);
}
- // Bitcast each element now.
- std::vector<Constant*> Result;
- Type *DstEltTy = DstTy->getElementType();
- for (unsigned i = 0; i != NumElts; ++i)
- Result.push_back(ConstantExpr::getBitCast(CV->getOperand(i),
- DstEltTy));
return ConstantVector::get(Result);
}
Instruction::CastOps firstOp = Instruction::CastOps(Op->getOpcode());
Instruction::CastOps secondOp = Instruction::CastOps(opc);
+ // Assume that pointers are never more than 64 bits wide.
+ IntegerType *FakeIntPtrTy = Type::getInt64Ty(DstTy->getContext());
+
// Let CastInst::isEliminableCastPair do the heavy lifting.
return CastInst::isEliminableCastPair(firstOp, secondOp, SrcTy, MidTy, DstTy,
- Type::getInt64Ty(DstTy->getContext()));
+ FakeIntPtrTy, FakeIntPtrTy,
+ FakeIntPtrTy);
}
static Constant *FoldBitCast(Constant *V, Type *DestTy) {
// the first element. If so, return the appropriate GEP instruction.
if (PointerType *PTy = dyn_cast<PointerType>(V->getType()))
if (PointerType *DPTy = dyn_cast<PointerType>(DestTy))
- if (PTy->getAddressSpace() == DPTy->getAddressSpace()) {
+ if (PTy->getAddressSpace() == DPTy->getAddressSpace()
+ && DPTy->getElementType()->isSized()) {
SmallVector<Value*, 8> IdxList;
Value *Zero =
Constant::getNullValue(Type::getInt32Ty(DPTy->getContext()));
if (isa<ConstantAggregateZero>(V))
return Constant::getNullValue(DestTy);
- if (ConstantVector *CV = dyn_cast<ConstantVector>(V))
- return BitCastConstantVector(CV, DestPTy);
+ // Handle ConstantVector and ConstantAggregateVector.
+ return BitCastConstantVector(V, DestPTy);
}
// Canonicalize scalar-to-vector bitcasts into vector-to-vector bitcasts
return UndefValue::get(DestTy);
}
- // No compile-time operations on this type yet.
- if (V->getType()->isPPC_FP128Ty() || DestTy->isPPC_FP128Ty())
- return 0;
-
if (V->isNullValue() && !DestTy->isX86_MMXTy())
return Constant::getNullValue(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 (ConstantVector *CV = dyn_cast<ConstantVector>(V))
- if (DestTy->isVectorTy() &&
- cast<VectorType>(DestTy)->getNumElements() ==
- CV->getType()->getNumElements()) {
- std::vector<Constant*> res;
- VectorType *DestVecTy = cast<VectorType>(DestTy);
- Type *DstEltTy = DestVecTy->getElementType();
- for (unsigned i = 0, e = CV->getType()->getNumElements(); i != e; ++i)
- res.push_back(ConstantExpr::getCast(opc,
- CV->getOperand(i), DstEltTy));
- return ConstantVector::get(res);
+ if ((isa<ConstantVector>(V) || isa<ConstantDataVector>(V)) &&
+ DestTy->isVectorTy() &&
+ DestTy->getVectorNumElements() == V->getType()->getVectorNumElements()) {
+ SmallVector<Constant*, 16> res;
+ VectorType *DestVecTy = cast<VectorType>(DestTy);
+ Type *DstEltTy = DestVecTy->getElementType();
+ Type *Ty = IntegerType::get(V->getContext(), 32);
+ for (unsigned i = 0, e = V->getType()->getVectorNumElements(); i != e; ++i) {
+ Constant *C =
+ ConstantExpr::getExtractElement(V, ConstantInt::get(Ty, i));
+ res.push_back(ConstantExpr::getCast(opc, C, DstEltTy));
}
+ return ConstantVector::get(res);
+ }
// We actually have to do a cast now. Perform the cast according to the
// opcode specified.
if (ConstantFP *FPC = dyn_cast<ConstantFP>(V)) {
bool ignored;
APFloat Val = FPC->getValueAPF();
- Val.convert(DestTy->isFloatTy() ? APFloat::IEEEsingle :
+ Val.convert(DestTy->isHalfTy() ? APFloat::IEEEhalf :
+ DestTy->isFloatTy() ? APFloat::IEEEsingle :
DestTy->isDoubleTy() ? APFloat::IEEEdouble :
DestTy->isX86_FP80Ty() ? APFloat::x87DoubleExtended :
DestTy->isFP128Ty() ? APFloat::IEEEquad :
+ DestTy->isPPC_FP128Ty() ? APFloat::PPCDoubleDouble :
APFloat::Bogus,
APFloat::rmNearestTiesToEven, &ignored);
return ConstantFP::get(V->getContext(), Val);
case Instruction::SIToFP:
if (ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
APInt api = CI->getValue();
- APFloat apf(APInt::getNullValue(DestTy->getPrimitiveSizeInBits()), true);
+ APFloat apf(APInt::getNullValue(DestTy->getPrimitiveSizeInBits()),
+ !DestTy->isPPC_FP128Ty() /* isEEEE */);
(void)apf.convertFromAPInt(api,
opc==Instruction::SIToFP,
APFloat::rmNearestTiesToEven);
Constant *llvm::ConstantFoldSelectInstruction(Constant *Cond,
Constant *V1, Constant *V2) {
- if (ConstantInt *CB = dyn_cast<ConstantInt>(Cond))
- return CB->getZExtValue() ? V1 : V2;
-
- // Check for zero aggregate and ConstantVector of zeros
+ // Check for i1 and vector true/false conditions.
if (Cond->isNullValue()) return V2;
-
- if (ConstantVector* CondV = dyn_cast<ConstantVector>(Cond)) {
-
- if (CondV->isAllOnesValue()) return V1;
-
- VectorType *VTy = cast<VectorType>(V1->getType());
- ConstantVector *CP1 = dyn_cast<ConstantVector>(V1);
- ConstantVector *CP2 = dyn_cast<ConstantVector>(V2);
-
- if ((CP1 || isa<ConstantAggregateZero>(V1)) &&
- (CP2 || isa<ConstantAggregateZero>(V2))) {
-
- // Find the element type of the returned vector
- Type *EltTy = VTy->getElementType();
- unsigned NumElem = VTy->getNumElements();
- std::vector<Constant*> Res(NumElem);
-
- bool Valid = true;
- for (unsigned i = 0; i < NumElem; ++i) {
- ConstantInt* c = dyn_cast<ConstantInt>(CondV->getOperand(i));
- if (!c) {
- Valid = false;
- break;
- }
- Constant *C1 = CP1 ? CP1->getOperand(i) : Constant::getNullValue(EltTy);
- Constant *C2 = CP2 ? CP2->getOperand(i) : Constant::getNullValue(EltTy);
- Res[i] = c->getZExtValue() ? C1 : C2;
- }
- // If we were able to build the vector, return it
- if (Valid) return ConstantVector::get(Res);
+ if (Cond->isAllOnesValue()) return V1;
+
+ // If the condition is a vector constant, fold the result elementwise.
+ if (ConstantVector *CondV = dyn_cast<ConstantVector>(Cond)) {
+ SmallVector<Constant*, 16> Result;
+ Type *Ty = IntegerType::get(CondV->getContext(), 32);
+ for (unsigned i = 0, e = V1->getType()->getVectorNumElements(); i != e;++i){
+ ConstantInt *Cond = dyn_cast<ConstantInt>(CondV->getOperand(i));
+ if (Cond == 0) break;
+
+ Constant *V = Cond->isNullValue() ? V2 : V1;
+ Constant *Res = ConstantExpr::getExtractElement(V, ConstantInt::get(Ty, i));
+ Result.push_back(Res);
}
+
+ // If we were able to build the vector, return it.
+ if (Result.size() == V1->getType()->getVectorNumElements())
+ return ConstantVector::get(Result);
}
-
if (isa<UndefValue>(Cond)) {
if (isa<UndefValue>(V1)) return V1;
return V2;
if (ConstantExpr *TrueVal = dyn_cast<ConstantExpr>(V1)) {
if (TrueVal->getOpcode() == Instruction::Select)
if (TrueVal->getOperand(0) == Cond)
- return ConstantExpr::getSelect(Cond, TrueVal->getOperand(1), V2);
+ return ConstantExpr::getSelect(Cond, TrueVal->getOperand(1), V2);
}
if (ConstantExpr *FalseVal = dyn_cast<ConstantExpr>(V2)) {
if (FalseVal->getOpcode() == Instruction::Select)
if (FalseVal->getOperand(0) == Cond)
- return ConstantExpr::getSelect(Cond, V1, FalseVal->getOperand(2));
+ return ConstantExpr::getSelect(Cond, V1, FalseVal->getOperand(2));
}
return 0;
Constant *llvm::ConstantFoldExtractElementInstruction(Constant *Val,
Constant *Idx) {
if (isa<UndefValue>(Val)) // ee(undef, x) -> undef
- return UndefValue::get(cast<VectorType>(Val->getType())->getElementType());
+ return UndefValue::get(Val->getType()->getVectorElementType());
if (Val->isNullValue()) // ee(zero, x) -> zero
- return Constant::getNullValue(
- cast<VectorType>(Val->getType())->getElementType());
-
- if (ConstantVector *CVal = dyn_cast<ConstantVector>(Val)) {
- if (ConstantInt *CIdx = dyn_cast<ConstantInt>(Idx)) {
- return CVal->getOperand(CIdx->getZExtValue());
- } else if (isa<UndefValue>(Idx)) {
- // ee({w,x,y,z}, undef) -> w (an arbitrary value).
- return CVal->getOperand(0);
- }
+ return Constant::getNullValue(Val->getType()->getVectorElementType());
+ // ee({w,x,y,z}, undef) -> undef
+ if (isa<UndefValue>(Idx))
+ return UndefValue::get(Val->getType()->getVectorElementType());
+
+ if (ConstantInt *CIdx = dyn_cast<ConstantInt>(Idx)) {
+ uint64_t Index = CIdx->getZExtValue();
+ // ee({w,x,y,z}, wrong_value) -> undef
+ if (Index >= Val->getType()->getVectorNumElements())
+ return UndefValue::get(Val->getType()->getVectorElementType());
+ return Val->getAggregateElement(Index);
}
return 0;
}
Constant *Idx) {
ConstantInt *CIdx = dyn_cast<ConstantInt>(Idx);
if (!CIdx) return 0;
- APInt idxVal = CIdx->getValue();
- if (isa<UndefValue>(Val)) {
- // Insertion of scalar constant into vector undef
- // Optimize away insertion of undef
- if (isa<UndefValue>(Elt))
- return Val;
- // Otherwise break the aggregate undef into multiple undefs and do
- // the insertion
- unsigned numOps =
- cast<VectorType>(Val->getType())->getNumElements();
- std::vector<Constant*> Ops;
- Ops.reserve(numOps);
- for (unsigned i = 0; i < numOps; ++i) {
- Constant *Op =
- (idxVal == i) ? Elt : UndefValue::get(Elt->getType());
- Ops.push_back(Op);
- }
- return ConstantVector::get(Ops);
- }
- if (isa<ConstantAggregateZero>(Val)) {
- // Insertion of scalar constant into vector aggregate zero
- // Optimize away insertion of zero
- if (Elt->isNullValue())
- return Val;
- // Otherwise break the aggregate zero into multiple zeros and do
- // the insertion
- unsigned numOps =
- cast<VectorType>(Val->getType())->getNumElements();
- std::vector<Constant*> Ops;
- Ops.reserve(numOps);
- for (unsigned i = 0; i < numOps; ++i) {
- Constant *Op =
- (idxVal == i) ? Elt : Constant::getNullValue(Elt->getType());
- Ops.push_back(Op);
- }
- return ConstantVector::get(Ops);
- }
- if (ConstantVector *CVal = dyn_cast<ConstantVector>(Val)) {
- // Insertion of scalar constant into vector constant
- std::vector<Constant*> Ops;
- Ops.reserve(CVal->getNumOperands());
- for (unsigned i = 0; i < CVal->getNumOperands(); ++i) {
- Constant *Op =
- (idxVal == i) ? Elt : cast<Constant>(CVal->getOperand(i));
- Ops.push_back(Op);
+ const APInt &IdxVal = CIdx->getValue();
+
+ SmallVector<Constant*, 16> Result;
+ Type *Ty = IntegerType::get(Val->getContext(), 32);
+ for (unsigned i = 0, e = Val->getType()->getVectorNumElements(); i != e; ++i){
+ if (i == IdxVal) {
+ Result.push_back(Elt);
+ continue;
}
- return ConstantVector::get(Ops);
+
+ Constant *C =
+ ConstantExpr::getExtractElement(Val, ConstantInt::get(Ty, i));
+ Result.push_back(C);
}
-
- return 0;
-}
-
-/// GetVectorElement - If C is a ConstantVector, ConstantAggregateZero or Undef
-/// return the specified element value. Otherwise return null.
-static Constant *GetVectorElement(Constant *C, unsigned EltNo) {
- if (ConstantVector *CV = dyn_cast<ConstantVector>(C))
- return CV->getOperand(EltNo);
-
- Type *EltTy = cast<VectorType>(C->getType())->getElementType();
- if (isa<ConstantAggregateZero>(C))
- return Constant::getNullValue(EltTy);
- if (isa<UndefValue>(C))
- return UndefValue::get(EltTy);
- return 0;
+
+ return ConstantVector::get(Result);
}
Constant *llvm::ConstantFoldShuffleVectorInstruction(Constant *V1,
Constant *V2,
Constant *Mask) {
+ unsigned MaskNumElts = Mask->getType()->getVectorNumElements();
+ Type *EltTy = V1->getType()->getVectorElementType();
+
// Undefined shuffle mask -> undefined value.
- if (isa<UndefValue>(Mask)) return UndefValue::get(V1->getType());
+ if (isa<UndefValue>(Mask))
+ return UndefValue::get(VectorType::get(EltTy, MaskNumElts));
- unsigned MaskNumElts = cast<VectorType>(Mask->getType())->getNumElements();
- unsigned SrcNumElts = cast<VectorType>(V1->getType())->getNumElements();
- Type *EltTy = cast<VectorType>(V1->getType())->getElementType();
+ // Don't break the bitcode reader hack.
+ if (isa<ConstantExpr>(Mask)) return 0;
+
+ unsigned SrcNumElts = V1->getType()->getVectorNumElements();
// Loop over the shuffle mask, evaluating each element.
SmallVector<Constant*, 32> Result;
for (unsigned i = 0; i != MaskNumElts; ++i) {
- Constant *InElt = GetVectorElement(Mask, i);
- if (InElt == 0) return 0;
-
- if (isa<UndefValue>(InElt))
+ int Elt = ShuffleVectorInst::getMaskValue(Mask, i);
+ if (Elt == -1) {
+ Result.push_back(UndefValue::get(EltTy));
+ continue;
+ }
+ Constant *InElt;
+ if (unsigned(Elt) >= SrcNumElts*2)
InElt = UndefValue::get(EltTy);
- else if (ConstantInt *CI = dyn_cast<ConstantInt>(InElt)) {
- unsigned Elt = CI->getZExtValue();
- if (Elt >= SrcNumElts*2)
- InElt = UndefValue::get(EltTy);
- else if (Elt >= SrcNumElts)
- InElt = GetVectorElement(V2, Elt - SrcNumElts);
- else
- InElt = GetVectorElement(V1, Elt);
- if (InElt == 0) return 0;
+ else if (unsigned(Elt) >= SrcNumElts) {
+ Type *Ty = IntegerType::get(V2->getContext(), 32);
+ InElt =
+ ConstantExpr::getExtractElement(V2,
+ ConstantInt::get(Ty, Elt - SrcNumElts));
} else {
- // Unknown value.
- return 0;
+ Type *Ty = IntegerType::get(V1->getContext(), 32);
+ InElt = ConstantExpr::getExtractElement(V1, ConstantInt::get(Ty, Elt));
}
Result.push_back(InElt);
}
if (Idxs.empty())
return Agg;
- if (isa<UndefValue>(Agg)) // ev(undef, x) -> undef
- return UndefValue::get(ExtractValueInst::getIndexedType(Agg->getType(),
- Idxs));
-
- if (isa<ConstantAggregateZero>(Agg)) // ev(0, x) -> 0
- return
- Constant::getNullValue(ExtractValueInst::getIndexedType(Agg->getType(),
- Idxs));
-
- // Otherwise recurse.
- if (ConstantStruct *CS = dyn_cast<ConstantStruct>(Agg))
- return ConstantFoldExtractValueInstruction(CS->getOperand(Idxs[0]),
- Idxs.slice(1));
-
- if (ConstantArray *CA = dyn_cast<ConstantArray>(Agg))
- return ConstantFoldExtractValueInstruction(CA->getOperand(Idxs[0]),
- Idxs.slice(1));
- ConstantVector *CV = cast<ConstantVector>(Agg);
- return ConstantFoldExtractValueInstruction(CV->getOperand(Idxs[0]),
- Idxs.slice(1));
+ if (Constant *C = Agg->getAggregateElement(Idxs[0]))
+ return ConstantFoldExtractValueInstruction(C, Idxs.slice(1));
+
+ return 0;
}
Constant *llvm::ConstantFoldInsertValueInstruction(Constant *Agg,
if (Idxs.empty())
return Val;
- if (isa<UndefValue>(Agg)) {
- // Insertion of constant into aggregate undef
- // Optimize away insertion of undef.
- if (isa<UndefValue>(Val))
- return Agg;
-
- // Otherwise break the aggregate undef into multiple undefs and do
- // the insertion.
- CompositeType *AggTy = cast<CompositeType>(Agg->getType());
- unsigned numOps;
- if (ArrayType *AR = dyn_cast<ArrayType>(AggTy))
- numOps = AR->getNumElements();
- else
- numOps = cast<StructType>(AggTy)->getNumElements();
-
- std::vector<Constant*> Ops(numOps);
- for (unsigned i = 0; i < numOps; ++i) {
- Type *MemberTy = AggTy->getTypeAtIndex(i);
- Constant *Op =
- (Idxs[0] == i) ?
- ConstantFoldInsertValueInstruction(UndefValue::get(MemberTy),
- Val, Idxs.slice(1)) :
- UndefValue::get(MemberTy);
- Ops[i] = Op;
- }
-
- if (StructType* ST = dyn_cast<StructType>(AggTy))
- return ConstantStruct::get(ST, Ops);
- return ConstantArray::get(cast<ArrayType>(AggTy), Ops);
- }
+ unsigned NumElts;
+ if (StructType *ST = dyn_cast<StructType>(Agg->getType()))
+ NumElts = ST->getNumElements();
+ else if (ArrayType *AT = dyn_cast<ArrayType>(Agg->getType()))
+ NumElts = AT->getNumElements();
+ else
+ NumElts = AT->getVectorNumElements();
- if (isa<ConstantAggregateZero>(Agg)) {
- // Insertion of constant into aggregate zero
- // Optimize away insertion of zero.
- if (Val->isNullValue())
- return Agg;
-
- // Otherwise break the aggregate zero into multiple zeros and do
- // the insertion.
- CompositeType *AggTy = cast<CompositeType>(Agg->getType());
- unsigned numOps;
- if (ArrayType *AR = dyn_cast<ArrayType>(AggTy))
- numOps = AR->getNumElements();
- else
- numOps = cast<StructType>(AggTy)->getNumElements();
+ SmallVector<Constant*, 32> Result;
+ for (unsigned i = 0; i != NumElts; ++i) {
+ Constant *C = Agg->getAggregateElement(i);
+ if (C == 0) return 0;
- std::vector<Constant*> Ops(numOps);
- for (unsigned i = 0; i < numOps; ++i) {
- Type *MemberTy = AggTy->getTypeAtIndex(i);
- Constant *Op =
- (Idxs[0] == i) ?
- ConstantFoldInsertValueInstruction(Constant::getNullValue(MemberTy),
- Val, Idxs.slice(1)) :
- Constant::getNullValue(MemberTy);
- Ops[i] = Op;
- }
+ if (Idxs[0] == i)
+ C = ConstantFoldInsertValueInstruction(C, Val, Idxs.slice(1));
- if (StructType *ST = dyn_cast<StructType>(AggTy))
- return ConstantStruct::get(ST, Ops);
- return ConstantArray::get(cast<ArrayType>(AggTy), Ops);
+ Result.push_back(C);
}
- if (isa<ConstantStruct>(Agg) || isa<ConstantArray>(Agg)) {
- // Insertion of constant into aggregate constant.
- std::vector<Constant*> Ops(Agg->getNumOperands());
- for (unsigned i = 0; i < Agg->getNumOperands(); ++i) {
- Constant *Op = cast<Constant>(Agg->getOperand(i));
- if (Idxs[0] == i)
- Op = ConstantFoldInsertValueInstruction(Op, Val, Idxs.slice(1));
- Ops[i] = Op;
- }
-
- if (StructType* ST = dyn_cast<StructType>(Agg->getType()))
- return ConstantStruct::get(ST, Ops);
- return ConstantArray::get(cast<ArrayType>(Agg->getType()), Ops);
- }
-
- return 0;
+ if (StructType *ST = dyn_cast<StructType>(Agg->getType()))
+ return ConstantStruct::get(ST, Result);
+ if (ArrayType *AT = dyn_cast<ArrayType>(Agg->getType()))
+ return ConstantArray::get(AT, Result);
+ return ConstantVector::get(Result);
}
Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode,
Constant *C1, Constant *C2) {
- // No compile-time operations on this type yet.
- if (C1->getType()->isPPC_FP128Ty())
- return 0;
-
// Handle UndefValue up front.
if (isa<UndefValue>(C1) || isa<UndefValue>(C2)) {
switch (Opcode) {
// At this point we know neither constant is an UndefValue.
if (ConstantInt *CI1 = dyn_cast<ConstantInt>(C1)) {
if (ConstantInt *CI2 = dyn_cast<ConstantInt>(C2)) {
- using namespace APIntOps;
const APInt &C1V = CI1->getValue();
const APInt &C2V = CI2->getValue();
switch (Opcode) {
}
}
} else if (VectorType *VTy = dyn_cast<VectorType>(C1->getType())) {
- ConstantVector *CP1 = dyn_cast<ConstantVector>(C1);
- ConstantVector *CP2 = dyn_cast<ConstantVector>(C2);
- if ((CP1 != NULL || isa<ConstantAggregateZero>(C1)) &&
- (CP2 != NULL || isa<ConstantAggregateZero>(C2))) {
- std::vector<Constant*> Res;
- Type* EltTy = VTy->getElementType();
- Constant *C1 = 0;
- Constant *C2 = 0;
- switch (Opcode) {
- default:
- break;
- case Instruction::Add:
- for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
- C1 = CP1 ? CP1->getOperand(i) : Constant::getNullValue(EltTy);
- C2 = CP2 ? CP2->getOperand(i) : Constant::getNullValue(EltTy);
- Res.push_back(ConstantExpr::getAdd(C1, C2));
- }
- return ConstantVector::get(Res);
- case Instruction::FAdd:
- for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
- C1 = CP1 ? CP1->getOperand(i) : Constant::getNullValue(EltTy);
- C2 = CP2 ? CP2->getOperand(i) : Constant::getNullValue(EltTy);
- Res.push_back(ConstantExpr::getFAdd(C1, C2));
- }
- return ConstantVector::get(Res);
- case Instruction::Sub:
- for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
- C1 = CP1 ? CP1->getOperand(i) : Constant::getNullValue(EltTy);
- C2 = CP2 ? CP2->getOperand(i) : Constant::getNullValue(EltTy);
- Res.push_back(ConstantExpr::getSub(C1, C2));
- }
- return ConstantVector::get(Res);
- case Instruction::FSub:
- for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
- C1 = CP1 ? CP1->getOperand(i) : Constant::getNullValue(EltTy);
- C2 = CP2 ? CP2->getOperand(i) : Constant::getNullValue(EltTy);
- Res.push_back(ConstantExpr::getFSub(C1, C2));
- }
- return ConstantVector::get(Res);
- case Instruction::Mul:
- for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
- C1 = CP1 ? CP1->getOperand(i) : Constant::getNullValue(EltTy);
- C2 = CP2 ? CP2->getOperand(i) : Constant::getNullValue(EltTy);
- Res.push_back(ConstantExpr::getMul(C1, C2));
- }
- return ConstantVector::get(Res);
- case Instruction::FMul:
- for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
- C1 = CP1 ? CP1->getOperand(i) : Constant::getNullValue(EltTy);
- C2 = CP2 ? CP2->getOperand(i) : Constant::getNullValue(EltTy);
- Res.push_back(ConstantExpr::getFMul(C1, C2));
- }
- return ConstantVector::get(Res);
- case Instruction::UDiv:
- for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
- C1 = CP1 ? CP1->getOperand(i) : Constant::getNullValue(EltTy);
- C2 = CP2 ? CP2->getOperand(i) : Constant::getNullValue(EltTy);
- Res.push_back(ConstantExpr::getUDiv(C1, C2));
- }
- return ConstantVector::get(Res);
- case Instruction::SDiv:
- for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
- C1 = CP1 ? CP1->getOperand(i) : Constant::getNullValue(EltTy);
- C2 = CP2 ? CP2->getOperand(i) : Constant::getNullValue(EltTy);
- Res.push_back(ConstantExpr::getSDiv(C1, C2));
- }
- return ConstantVector::get(Res);
- case Instruction::FDiv:
- for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
- C1 = CP1 ? CP1->getOperand(i) : Constant::getNullValue(EltTy);
- C2 = CP2 ? CP2->getOperand(i) : Constant::getNullValue(EltTy);
- Res.push_back(ConstantExpr::getFDiv(C1, C2));
- }
- return ConstantVector::get(Res);
- case Instruction::URem:
- for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
- C1 = CP1 ? CP1->getOperand(i) : Constant::getNullValue(EltTy);
- C2 = CP2 ? CP2->getOperand(i) : Constant::getNullValue(EltTy);
- Res.push_back(ConstantExpr::getURem(C1, C2));
- }
- return ConstantVector::get(Res);
- case Instruction::SRem:
- for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
- C1 = CP1 ? CP1->getOperand(i) : Constant::getNullValue(EltTy);
- C2 = CP2 ? CP2->getOperand(i) : Constant::getNullValue(EltTy);
- Res.push_back(ConstantExpr::getSRem(C1, C2));
- }
- return ConstantVector::get(Res);
- case Instruction::FRem:
- for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
- C1 = CP1 ? CP1->getOperand(i) : Constant::getNullValue(EltTy);
- C2 = CP2 ? CP2->getOperand(i) : Constant::getNullValue(EltTy);
- Res.push_back(ConstantExpr::getFRem(C1, C2));
- }
- return ConstantVector::get(Res);
- case Instruction::And:
- for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
- C1 = CP1 ? CP1->getOperand(i) : Constant::getNullValue(EltTy);
- C2 = CP2 ? CP2->getOperand(i) : Constant::getNullValue(EltTy);
- Res.push_back(ConstantExpr::getAnd(C1, C2));
- }
- return ConstantVector::get(Res);
- case Instruction::Or:
- for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
- C1 = CP1 ? CP1->getOperand(i) : Constant::getNullValue(EltTy);
- C2 = CP2 ? CP2->getOperand(i) : Constant::getNullValue(EltTy);
- Res.push_back(ConstantExpr::getOr(C1, C2));
- }
- return ConstantVector::get(Res);
- case Instruction::Xor:
- for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
- C1 = CP1 ? CP1->getOperand(i) : Constant::getNullValue(EltTy);
- C2 = CP2 ? CP2->getOperand(i) : Constant::getNullValue(EltTy);
- Res.push_back(ConstantExpr::getXor(C1, C2));
- }
- return ConstantVector::get(Res);
- case Instruction::LShr:
- for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
- C1 = CP1 ? CP1->getOperand(i) : Constant::getNullValue(EltTy);
- C2 = CP2 ? CP2->getOperand(i) : Constant::getNullValue(EltTy);
- Res.push_back(ConstantExpr::getLShr(C1, C2));
- }
- return ConstantVector::get(Res);
- case Instruction::AShr:
- for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
- C1 = CP1 ? CP1->getOperand(i) : Constant::getNullValue(EltTy);
- C2 = CP2 ? CP2->getOperand(i) : Constant::getNullValue(EltTy);
- Res.push_back(ConstantExpr::getAShr(C1, C2));
- }
- return ConstantVector::get(Res);
- case Instruction::Shl:
- for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
- C1 = CP1 ? CP1->getOperand(i) : Constant::getNullValue(EltTy);
- C2 = CP2 ? CP2->getOperand(i) : Constant::getNullValue(EltTy);
- Res.push_back(ConstantExpr::getShl(C1, C2));
- }
- return ConstantVector::get(Res);
- }
+ // Perform elementwise folding.
+ SmallVector<Constant*, 16> Result;
+ Type *Ty = IntegerType::get(VTy->getContext(), 32);
+ for (unsigned i = 0, e = VTy->getNumElements(); i != e; ++i) {
+ Constant *LHS =
+ ConstantExpr::getExtractElement(C1, ConstantInt::get(Ty, i));
+ Constant *RHS =
+ ConstantExpr::getExtractElement(C2, ConstantInt::get(Ty, i));
+
+ Result.push_back(ConstantExpr::get(Opcode, LHS, RHS));
}
+
+ return ConstantVector::get(Result);
}
if (ConstantExpr *CE1 = dyn_cast<ConstantExpr>(C1)) {
assert(V1->getType() == V2->getType() &&
"Cannot compare values of different types!");
- // No compile-time operations on this type yet.
- if (V1->getType()->isPPC_FP128Ty())
- return FCmpInst::BAD_FCMP_PREDICATE;
-
// Handle degenerate case quickly
if (V1 == V2) return FCmpInst::FCMP_OEQ;
return ConstantInt::get(ResultTy, CmpInst::isTrueWhenEqual(pred));
}
- // No compile-time operations on this type yet.
- if (C1->getType()->isPPC_FP128Ty())
- return 0;
-
// icmp eq/ne(null,GV) -> false/true
if (C1->isNullValue()) {
if (const GlobalValue *GV = dyn_cast<GlobalValue>(C2))
APInt V1 = cast<ConstantInt>(C1)->getValue();
APInt V2 = cast<ConstantInt>(C2)->getValue();
switch (pred) {
- default: llvm_unreachable("Invalid ICmp Predicate"); return 0;
+ default: llvm_unreachable("Invalid ICmp Predicate");
case ICmpInst::ICMP_EQ: return ConstantInt::get(ResultTy, V1 == V2);
case ICmpInst::ICMP_NE: return ConstantInt::get(ResultTy, V1 != V2);
case ICmpInst::ICMP_SLT: return ConstantInt::get(ResultTy, V1.slt(V2));
APFloat C2V = cast<ConstantFP>(C2)->getValueAPF();
APFloat::cmpResult R = C1V.compare(C2V);
switch (pred) {
- default: llvm_unreachable("Invalid FCmp Predicate"); return 0;
+ default: llvm_unreachable("Invalid FCmp Predicate");
case FCmpInst::FCMP_FALSE: return Constant::getNullValue(ResultTy);
case FCmpInst::FCMP_TRUE: return Constant::getAllOnesValue(ResultTy);
case FCmpInst::FCMP_UNO:
R==APFloat::cmpEqual);
}
} else if (C1->getType()->isVectorTy()) {
- SmallVector<Constant*, 16> C1Elts, C2Elts;
- C1->getVectorElements(C1Elts);
- C2->getVectorElements(C2Elts);
- if (C1Elts.empty() || C2Elts.empty())
- return 0;
-
// If we can constant fold the comparison of each element, constant fold
// the whole vector comparison.
SmallVector<Constant*, 4> ResElts;
+ Type *Ty = IntegerType::get(C1->getContext(), 32);
// Compare the elements, producing an i1 result or constant expr.
- for (unsigned i = 0, e = C1Elts.size(); i != e; ++i)
- ResElts.push_back(ConstantExpr::getCompare(pred, C1Elts[i], C2Elts[i]));
-
+ for (unsigned i = 0, e = C1->getType()->getVectorNumElements(); i != e;++i){
+ Constant *C1E =
+ ConstantExpr::getExtractElement(C1, ConstantInt::get(Ty, i));
+ Constant *C2E =
+ ConstantExpr::getExtractElement(C2, ConstantInt::get(Ty, i));
+
+ ResElts.push_back(ConstantExpr::getCompare(pred, C1E, C2E));
+ }
+
return ConstantVector::get(ResElts);
}
if (isa<UndefValue>(C)) {
PointerType *Ptr = cast<PointerType>(C->getType());
- Type *Ty = GetElementPtrInst::getIndexedType(Ptr, Idxs.begin(), Idxs.end());
+ Type *Ty = GetElementPtrInst::getIndexedType(Ptr, Idxs);
assert(Ty != 0 && "Invalid indices for GEP!");
return UndefValue::get(PointerType::get(Ty, Ptr->getAddressSpace()));
}
}
if (isNull) {
PointerType *Ptr = cast<PointerType>(C->getType());
- Type *Ty = GetElementPtrInst::getIndexedType(Ptr, Idxs.begin(),
- Idxs.end());
+ Type *Ty = GetElementPtrInst::getIndexedType(Ptr, Idxs);
assert(Ty != 0 && "Invalid indices for GEP!");
return ConstantPointerNull::get(PointerType::get(Ty,
Ptr->getAddressSpace()));
I != E; ++I)
LastTy = *I;
- if ((LastTy && LastTy->isArrayTy()) || Idx0->isNullValue()) {
+ if ((LastTy && isa<SequentialType>(LastTy)) || Idx0->isNullValue()) {
SmallVector<Value*, 16> NewIndices;
NewIndices.reserve(Idxs.size() + CE->getNumOperands());
for (unsigned i = 1, e = CE->getNumOperands()-1; i != e; ++i)
NewIndices.push_back(Combined);
NewIndices.append(Idxs.begin() + 1, Idxs.end());
- return (inBounds && cast<GEPOperator>(CE)->isInBounds()) ?
- ConstantExpr::getInBoundsGetElementPtr(CE->getOperand(0),
- NewIndices) :
- ConstantExpr::getGetElementPtr(CE->getOperand(0), NewIndices);
+ return
+ ConstantExpr::getGetElementPtr(CE->getOperand(0), NewIndices,
+ inBounds &&
+ cast<GEPOperator>(CE)->isInBounds());
}
}
if (ArrayType *CAT =
dyn_cast<ArrayType>(cast<PointerType>(C->getType())->getElementType()))
if (CAT->getElementType() == SAT->getElementType())
- return inBounds ?
- ConstantExpr::getInBoundsGetElementPtr(
- (Constant*)CE->getOperand(0), Idxs) :
- ConstantExpr::getGetElementPtr(
- (Constant*)CE->getOperand(0), Idxs);
+ return
+ ConstantExpr::getGetElementPtr((Constant*)CE->getOperand(0),
+ Idxs, inBounds);
}
}
if (!NewIdxs.empty()) {
for (unsigned i = 0, e = Idxs.size(); i != e; ++i)
if (!NewIdxs[i]) NewIdxs[i] = cast<Constant>(Idxs[i]);
- return inBounds ?
- ConstantExpr::getInBoundsGetElementPtr(C, NewIdxs) :
- ConstantExpr::getGetElementPtr(C, NewIdxs);
+ return ConstantExpr::getGetElementPtr(C, NewIdxs, inBounds);
}
// If all indices are known integers and normalized, we can do a simple
projects / oota-llvm.git / blobdiff