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Various code simplifications.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95044 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-02-02 01:38:49 +00:00
parent 87641fa6dc
commit 8db08df5d3
1 changed files with 28 additions and 31 deletions
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17
lib/Analysis/ScalarEvolution.cpp
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@@ -351,17 +351,15 @@ bool SCEVUnknown::isSizeOf(const Type *&AllocTy) const {
if (ConstantExpr *VCE = dyn_cast<ConstantExpr>(V))
if (VCE->getOpcode() == Instruction::PtrToInt)
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(VCE->getOperand(0)))
if (CE->getOpcode() == Instruction::GetElementPtr)
if (CE->getOperand(0)->isNullValue()) {
const Type *Ty =
cast<PointerType>(CE->getOperand(0)->getType())->getElementType();
if (CE->getNumOperands() == 2)
if (CE->getOpcode() == Instruction::GetElementPtr &&
CE->getOperand(0)->isNullValue() &&
CE->getNumOperands() == 2)
if (ConstantInt *CI = dyn_cast<ConstantInt>(CE->getOperand(1)))
if (CI->isOne()) {
AllocTy = Ty;
AllocTy = cast<PointerType>(CE->getOperand(0)->getType())
->getElementType();
return true;
}
}
return false;
}
@@ -370,8 +368,8 @@ bool SCEVUnknown::isAlignOf(const Type *&AllocTy) const {
if (ConstantExpr *VCE = dyn_cast<ConstantExpr>(V))
if (VCE->getOpcode() == Instruction::PtrToInt)
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(VCE->getOperand(0)))
if (CE->getOpcode() == Instruction::GetElementPtr)
if (CE->getOperand(0)->isNullValue()) {
if (CE->getOpcode() == Instruction::GetElementPtr &&
CE->getOperand(0)->isNullValue()) {
const Type *Ty =
cast<PointerType>(CE->getOperand(0)->getType())->getElementType();
if (const StructType *STy = dyn_cast<StructType>(Ty))
@@ -2720,7 +2718,6 @@ const SCEV *ScalarEvolution::createNodeForGEP(GEPOperator *GEP) {
} else {
// For an array, add the element offset, explicitly scaled.
const SCEV *LocalOffset = getSCEV(Index);
if (!isa<PointerType>(LocalOffset->getType()))
// Getelementptr indicies are signed.
LocalOffset = getTruncateOrSignExtend(LocalOffset, IntPtrTy);
// Lower "inbounds" GEPs to NSW arithmetic.