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Cleanup whitespace and indentation.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80451 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-08-29 23:35:16 +00:00
parent c34ee42595
commit f8a87e8343
1 changed files with 28 additions and 29 deletions
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57
lib/VMCore/ConstantFold.cpp
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@ -49,7 +49,7 @@ static Constant *BitCastConstantVector(LLVMContext &Context, ConstantVector *CV,
unsigned NumElts = DstTy->getNumElements(); unsigned NumElts = DstTy->getNumElements();
if (NumElts != CV->getNumOperands()) if (NumElts != CV->getNumOperands())
return 0; return 0;
// Check to verify that all elements of the input are simple. // Check to verify that all elements of the input are simple.
for (unsigned i = 0; i != NumElts; ++i) { for (unsigned i = 0; i != NumElts; ++i) {
if (!isa<ConstantInt>(CV->getOperand(i)) && if (!isa<ConstantInt>(CV->getOperand(i)) &&
@ -79,7 +79,7 @@ foldConstantCastPair(
assert(Op && Op->isCast() && "Can't fold cast of cast without a cast!"); assert(Op && Op->isCast() && "Can't fold cast of cast without a cast!");
assert(DstTy && DstTy->isFirstClassType() && "Invalid cast destination type"); assert(DstTy && DstTy->isFirstClassType() && "Invalid cast destination type");
assert(CastInst::isCast(opc) && "Invalid cast opcode"); assert(CastInst::isCast(opc) && "Invalid cast opcode");
// The the types and opcodes for the two Cast constant expressions // The the types and opcodes for the two Cast constant expressions
const Type *SrcTy = Op->getOperand(0)->getType(); const Type *SrcTy = Op->getOperand(0)->getType();
const Type *MidTy = Op->getType(); const Type *MidTy = Op->getType();
@ -96,7 +96,7 @@ static Constant *FoldBitCast(LLVMContext &Context,
const Type *SrcTy = V->getType(); const Type *SrcTy = V->getType();
if (SrcTy == DestTy) if (SrcTy == DestTy)
return V; // no-op cast return V; // no-op cast
// Check to see if we are casting a pointer to an aggregate to a pointer to // Check to see if we are casting a pointer to an aggregate to a pointer to
// the first element. If so, return the appropriate GEP instruction. // the first element. If so, return the appropriate GEP instruction.
if (const PointerType *PTy = dyn_cast<PointerType>(V->getType())) if (const PointerType *PTy = dyn_cast<PointerType>(V->getType()))
@ -120,13 +120,13 @@ static Constant *FoldBitCast(LLVMContext &Context,
break; break;
} }
} }
if (ElTy == DPTy->getElementType()) if (ElTy == DPTy->getElementType())
// This GEP is inbounds because all indices are zero. // This GEP is inbounds because all indices are zero.
return ConstantExpr::getInBoundsGetElementPtr(V, &IdxList[0], return ConstantExpr::getInBoundsGetElementPtr(V, &IdxList[0],
IdxList.size()); IdxList.size());
} }
// Handle casts from one vector constant to another. We know that the src // Handle casts from one vector constant to another. We know that the src
// and dest type have the same size (otherwise its an illegal cast). // and dest type have the same size (otherwise its an illegal cast).
if (const VectorType *DestPTy = dyn_cast<VectorType>(DestTy)) { if (const VectorType *DestPTy = dyn_cast<VectorType>(DestTy)) {
@ -137,7 +137,7 @@ static Constant *FoldBitCast(LLVMContext &Context,
// First, check for null. Undef is already handled. // First, check for null. Undef is already handled.
if (isa<ConstantAggregateZero>(V)) if (isa<ConstantAggregateZero>(V))
return Constant::getNullValue(DestTy); return Constant::getNullValue(DestTy);
if (ConstantVector *CV = dyn_cast<ConstantVector>(V)) if (ConstantVector *CV = dyn_cast<ConstantVector>(V))
return BitCastConstantVector(Context, CV, DestPTy); return BitCastConstantVector(Context, CV, DestPTy);
} }
@ -149,12 +149,12 @@ static Constant *FoldBitCast(LLVMContext &Context,
return ConstantExpr::getBitCast( return ConstantExpr::getBitCast(
ConstantVector::get(&V, 1), DestPTy); ConstantVector::get(&V, 1), DestPTy);
} }
// Finally, implement bitcast folding now. The code below doesn't handle // Finally, implement bitcast folding now. The code below doesn't handle
// bitcast right. // bitcast right.
if (isa<ConstantPointerNull>(V)) // ptr->ptr cast. if (isa<ConstantPointerNull>(V)) // ptr->ptr cast.
return ConstantPointerNull::get(cast<PointerType>(DestTy)); return ConstantPointerNull::get(cast<PointerType>(DestTy));
// Handle integral constant input. // Handle integral constant input.
if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) { if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
if (DestTy->isInteger()) if (DestTy->isInteger())
@ -341,7 +341,7 @@ Constant *llvm::ConstantFoldExtractElementInstruction(LLVMContext &Context,
if (Val->isNullValue()) // ee(zero, x) -> zero if (Val->isNullValue()) // ee(zero, x) -> zero
return Constant::getNullValue( return Constant::getNullValue(
cast<VectorType>(Val->getType())->getElementType()); cast<VectorType>(Val->getType())->getElementType());
if (const ConstantVector *CVal = dyn_cast<ConstantVector>(Val)) { if (const ConstantVector *CVal = dyn_cast<ConstantVector>(Val)) {
if (const ConstantInt *CIdx = dyn_cast<ConstantInt>(Idx)) { if (const ConstantInt *CIdx = dyn_cast<ConstantInt>(Idx)) {
return CVal->getOperand(CIdx->getZExtValue()); return CVal->getOperand(CIdx->getZExtValue());
@ -417,7 +417,7 @@ static Constant *GetVectorElement(LLVMContext &Context, const Constant *C,
unsigned EltNo) { unsigned EltNo) {
if (const ConstantVector *CV = dyn_cast<ConstantVector>(C)) if (const ConstantVector *CV = dyn_cast<ConstantVector>(C))
return CV->getOperand(EltNo); return CV->getOperand(EltNo);
const Type *EltTy = cast<VectorType>(C->getType())->getElementType(); const Type *EltTy = cast<VectorType>(C->getType())->getElementType();
if (isa<ConstantAggregateZero>(C)) if (isa<ConstantAggregateZero>(C))
return Constant::getNullValue(EltTy); return Constant::getNullValue(EltTy);
@ -661,7 +661,7 @@ Constant *llvm::ConstantFoldBinaryInstruction(LLVMContext &Context,
if (CI2->isZero()) return const_cast<Constant*>(C2); // X & 0 == 0 if (CI2->isZero()) return const_cast<Constant*>(C2); // X & 0 == 0
if (CI2->isAllOnesValue()) if (CI2->isAllOnesValue())
return const_cast<Constant*>(C1); // X & -1 == X return const_cast<Constant*>(C1); // X & -1 == X
if (const ConstantExpr *CE1 = dyn_cast<ConstantExpr>(C1)) { if (const ConstantExpr *CE1 = dyn_cast<ConstantExpr>(C1)) {
// (zext i32 to i64) & 4294967295 -> (zext i32 to i64) // (zext i32 to i64) & 4294967295 -> (zext i32 to i64)
if (CE1->getOpcode() == Instruction::ZExt) { if (CE1->getOpcode() == Instruction::ZExt) {
@ -672,17 +672,17 @@ Constant *llvm::ConstantFoldBinaryInstruction(LLVMContext &Context,
if ((PossiblySetBits & CI2->getValue()) == PossiblySetBits) if ((PossiblySetBits & CI2->getValue()) == PossiblySetBits)
return const_cast<Constant*>(C1); return const_cast<Constant*>(C1);
} }
// If and'ing the address of a global with a constant, fold it. // If and'ing the address of a global with a constant, fold it.
if (CE1->getOpcode() == Instruction::PtrToInt && if (CE1->getOpcode() == Instruction::PtrToInt &&
isa<GlobalValue>(CE1->getOperand(0))) { isa<GlobalValue>(CE1->getOperand(0))) {
GlobalValue *GV = cast<GlobalValue>(CE1->getOperand(0)); GlobalValue *GV = cast<GlobalValue>(CE1->getOperand(0));
// Functions are at least 4-byte aligned. // Functions are at least 4-byte aligned.
unsigned GVAlign = GV->getAlignment(); unsigned GVAlign = GV->getAlignment();
if (isa<Function>(GV)) if (isa<Function>(GV))
GVAlign = std::max(GVAlign, 4U); GVAlign = std::max(GVAlign, 4U);
if (GVAlign > 1) { if (GVAlign > 1) {
unsigned DstWidth = CI2->getType()->getBitWidth(); unsigned DstWidth = CI2->getType()->getBitWidth();
unsigned SrcWidth = std::min(DstWidth, Log2_32(GVAlign)); unsigned SrcWidth = std::min(DstWidth, Log2_32(GVAlign));
@ -712,7 +712,7 @@ Constant *llvm::ConstantFoldBinaryInstruction(LLVMContext &Context,
break; break;
} }
} }
// At this point we know neither constant is an UndefValue. // At this point we know neither constant is an UndefValue.
if (const ConstantInt *CI1 = dyn_cast<ConstantInt>(C1)) { if (const ConstantInt *CI1 = dyn_cast<ConstantInt>(C1)) {
if (const ConstantInt *CI2 = dyn_cast<ConstantInt>(C2)) { if (const ConstantInt *CI2 = dyn_cast<ConstantInt>(C2)) {
@ -989,7 +989,7 @@ Constant *llvm::ConstantFoldBinaryInstruction(LLVMContext &Context,
case Instruction::Xor: case Instruction::Xor:
// No change of opcode required. // No change of opcode required.
return ConstantFoldBinaryInstruction(Context, Opcode, C2, C1); return ConstantFoldBinaryInstruction(Context, Opcode, C2, C1);
case Instruction::Shl: case Instruction::Shl:
case Instruction::LShr: case Instruction::LShr:
case Instruction::AShr: case Instruction::AShr:
@ -1005,7 +1005,7 @@ Constant *llvm::ConstantFoldBinaryInstruction(LLVMContext &Context,
break; break;
} }
} }
// We don't know how to fold this. // We don't know how to fold this.
return 0; return 0;
} }
@ -1113,7 +1113,7 @@ static FCmpInst::Predicate evaluateFCmpRelation(LLVMContext &Context,
// Nothing more we can do // Nothing more we can do
return FCmpInst::BAD_FCMP_PREDICATE; return FCmpInst::BAD_FCMP_PREDICATE;
} }
// If the first operand is simple and second is ConstantExpr, swap operands. // If the first operand is simple and second is ConstantExpr, swap operands.
FCmpInst::Predicate SwappedRelation = evaluateFCmpRelation(Context, V2, V1); FCmpInst::Predicate SwappedRelation = evaluateFCmpRelation(Context, V2, V1);
if (SwappedRelation != FCmpInst::BAD_FCMP_PREDICATE) if (SwappedRelation != FCmpInst::BAD_FCMP_PREDICATE)
@ -1177,11 +1177,11 @@ static ICmpInst::Predicate evaluateICmpRelation(LLVMContext &Context,
R = dyn_cast<ConstantInt>(ConstantExpr::getICmp(pred, C1, C2)); R = dyn_cast<ConstantInt>(ConstantExpr::getICmp(pred, C1, C2));
if (R && !R->isZero()) if (R && !R->isZero())
return pred; return pred;
// If we couldn't figure it out, bail. // If we couldn't figure it out, bail.
return ICmpInst::BAD_ICMP_PREDICATE; return ICmpInst::BAD_ICMP_PREDICATE;
} }
// If the first operand is simple, swap operands. // If the first operand is simple, swap operands.
ICmpInst::Predicate SwappedRelation = ICmpInst::Predicate SwappedRelation =
evaluateICmpRelation(Context, V2, V1, isSigned); evaluateICmpRelation(Context, V2, V1, isSigned);
@ -1489,7 +1489,7 @@ Constant *llvm::ConstantFoldCompareInstruction(LLVMContext &Context,
SmallVector<Constant*, 16> C1Elts, C2Elts; SmallVector<Constant*, 16> C1Elts, C2Elts;
C1->getVectorElements(Context, C1Elts); C1->getVectorElements(Context, C1Elts);
C2->getVectorElements(Context, C2Elts); C2->getVectorElements(Context, C2Elts);
// If we can constant fold the comparison of each element, constant fold // If we can constant fold the comparison of each element, constant fold
// the whole vector comparison. // the whole vector comparison.
SmallVector<Constant*, 4> ResElts; SmallVector<Constant*, 4> ResElts;
@ -1554,7 +1554,7 @@ Constant *llvm::ConstantFoldCompareInstruction(LLVMContext &Context,
Result = 1; Result = 1;
break; break;
} }
// If we evaluated the result, return it now. // If we evaluated the result, return it now.
if (Result != -1) if (Result != -1)
return ConstantInt::get(Type::getInt1Ty(Context), Result); return ConstantInt::get(Type::getInt1Ty(Context), Result);
@ -1631,11 +1631,11 @@ Constant *llvm::ConstantFoldCompareInstruction(LLVMContext &Context,
if (pred == ICmpInst::ICMP_NE) Result = 1; if (pred == ICmpInst::ICMP_NE) Result = 1;
break; break;
} }
// If we evaluated the result, return it now. // If we evaluated the result, return it now.
if (Result != -1) if (Result != -1)
return ConstantInt::get(Type::getInt1Ty(Context), Result); return ConstantInt::get(Type::getInt1Ty(Context), Result);
if (!isa<ConstantExpr>(C1) && isa<ConstantExpr>(C2)) { if (!isa<ConstantExpr>(C1) && isa<ConstantExpr>(C2)) {
// If C2 is a constant expr and C1 isn't, flip 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. // other way if possible.
@ -1663,7 +1663,7 @@ Constant *llvm::ConstantFoldCompareInstruction(LLVMContext &Context,
} }
} }
return 0; return 0;
} }
Constant *llvm::ConstantFoldGetElementPtr(LLVMContext &Context, Constant *llvm::ConstantFoldGetElementPtr(LLVMContext &Context,
const Constant *C, const Constant *C,
@ -1759,7 +1759,7 @@ Constant *llvm::ConstantFoldGetElementPtr(LLVMContext &Context,
return ConstantExpr::getGetElementPtr( return ConstantExpr::getGetElementPtr(
(Constant*)CE->getOperand(0), Idxs, NumIdx); (Constant*)CE->getOperand(0), Idxs, NumIdx);
} }
// Fold: getelementptr (i8* inttoptr (i64 1 to i8*), i32 -1) // Fold: getelementptr (i8* inttoptr (i64 1 to i8*), i32 -1)
// Into: inttoptr (i64 0 to i8*) // Into: inttoptr (i64 0 to i8*)
// This happens with pointers to member functions in C++. // This happens with pointers to member functions in C++.
@ -1768,7 +1768,7 @@ Constant *llvm::ConstantFoldGetElementPtr(LLVMContext &Context,
cast<PointerType>(CE->getType())->getElementType() == Type::getInt8Ty(Context)) { cast<PointerType>(CE->getType())->getElementType() == Type::getInt8Ty(Context)) {
Constant *Base = CE->getOperand(0); Constant *Base = CE->getOperand(0);
Constant *Offset = Idxs[0]; Constant *Offset = Idxs[0];
// Convert the smaller integer to the larger type. // Convert the smaller integer to the larger type.
if (Offset->getType()->getPrimitiveSizeInBits() < if (Offset->getType()->getPrimitiveSizeInBits() <
Base->getType()->getPrimitiveSizeInBits()) Base->getType()->getPrimitiveSizeInBits())
@ -1776,11 +1776,10 @@ Constant *llvm::ConstantFoldGetElementPtr(LLVMContext &Context,
else if (Base->getType()->getPrimitiveSizeInBits() < else if (Base->getType()->getPrimitiveSizeInBits() <
Offset->getType()->getPrimitiveSizeInBits()) Offset->getType()->getPrimitiveSizeInBits())
Base = ConstantExpr::getZExt(Base, Offset->getType()); Base = ConstantExpr::getZExt(Base, Offset->getType());
Base = ConstantExpr::getAdd(Base, Offset); Base = ConstantExpr::getAdd(Base, Offset);
return ConstantExpr::getIntToPtr(Base, CE->getType()); return ConstantExpr::getIntToPtr(Base, CE->getType());
} }
} }
return 0; return 0;
} }