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Remove unnecessary casts

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6201 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-05-14 17:51:05 +00:00
parent 9e094c40df
commit 3b9922f99c
2 changed files with 14 additions and 13 deletions
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4
lib/VMCore/ConstantFold.cpp
View File

@ -91,7 +91,7 @@ Constant *ConstantFoldCastInstruction(const Constant *V, const Type *DestTy) {
if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(V))
if (CE->getOpcode() == Instruction::Cast) {
Constant *Op = (Constant*)cast<Constant>(CE->getOperand(0));
Constant *Op = const_cast<Constant*>(CE->getOperand(0));
// Try to not produce a cast of a cast, which is almost always redundant.
if (!Op->getType()->isFloatingPoint() &&
!CE->getType()->isFloatingPoint() &&
@ -166,7 +166,7 @@ Constant *ConstantFoldGetElementPtr(const Constant *C,
dyn_cast<ArrayType>(cast<PointerType>(C->getType())->getElementType()))
if (CAT->getElementType() == SAT->getElementType())
return ConstantExpr::getGetElementPtr(
(Constant*)cast<Constant>(CE->getOperand(0)), IdxList);
(Constant*)CE->getOperand(0), IdxList);
return 0;
}

23
lib/VMCore/Constants.cpp
View File

@ -411,30 +411,31 @@ void ConstantPointerRef::replaceUsesOfWithOnConstant(Value *From, Value *To) {
}
}
void ConstantExpr::replaceUsesOfWithOnConstant(Value *From, Value *To) {
assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
void ConstantExpr::replaceUsesOfWithOnConstant(Value *From, Value *ToV) {
assert(isa<Constant>(ToV) && "Cannot make Constant refer to non-constant!");
Constant *To = cast<Constant>(ToV);
Constant *Replacement = 0;
if (getOpcode() == Instruction::GetElementPtr) {
std::vector<Constant*> Indices;
Constant *Pointer = cast<Constant>(getOperand(0));
Constant *Pointer = getOperand(0);
Indices.reserve(getNumOperands()-1);
if (Pointer == From) Pointer = cast<Constant>(To);
if (Pointer == From) Pointer = To;
for (unsigned i = 1, e = getNumOperands(); i != e; ++i) {
Constant *Val = cast<Constant>(getOperand(i));
if (Val == From) Val = cast<Constant>(To);
Constant *Val = getOperand(i);
if (Val == From) Val = To;
Indices.push_back(Val);
}
Replacement = ConstantExpr::getGetElementPtr(Pointer, Indices);
} else if (getOpcode() == Instruction::Cast) {
assert(getOperand(0) == From && "Cast only has one use!");
Replacement = ConstantExpr::getCast(cast<Constant>(To), getType());
Replacement = ConstantExpr::getCast(To, getType());
} else if (getNumOperands() == 2) {
Constant *C1 = cast<Constant>(getOperand(0));
Constant *C2 = cast<Constant>(getOperand(1));
if (C1 == From) C1 = cast<Constant>(To);
if (C2 == From) C2 = cast<Constant>(To);
Constant *C1 = getOperand(0);
Constant *C2 = getOperand(1);
if (C1 == From) C1 = To;
if (C2 == From) C2 = To;
Replacement = ConstantExpr::get(getOpcode(), C1, C2);
} else {
assert(0 && "Unknown ConstantExpr type!");