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ValueTracking: use getAlignment in isAligned

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Reviewed By: reames

Differential Revision: http://reviews.llvm.org/D13517


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@249841 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Artur Pilipenko 2015-10-09 15:58:26 +00:00
parent 0dbce2b4db
commit fb36ba7b83
1 changed files with 1 additions and 14 deletions
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15
lib/Analysis/ValueTracking.cpp
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@ -2998,20 +2998,7 @@ static bool isDereferenceableFromAttribute(const Value *V, const DataLayout &DL,
static bool isAligned(const Value *Base, APInt Offset, unsigned Align,
const DataLayout &DL) {
APInt BaseAlign(Offset.getBitWidth(), 0);
if (const AllocaInst *AI = dyn_cast<AllocaInst>(Base))
BaseAlign = AI->getAlignment();
else if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(Base))
BaseAlign = GV->getAlignment();
else if (const Argument *A = dyn_cast<Argument>(Base))
BaseAlign = A->getParamAlignment();
else if (auto CS = ImmutableCallSite(Base))
BaseAlign = CS.getAttributes().getParamAlignment(AttributeSet::ReturnIndex);
else if (const LoadInst *LI = dyn_cast<LoadInst>(Base))
if (MDNode *MD = LI->getMetadata(LLVMContext::MD_align)) {
ConstantInt *CI = mdconst::extract<ConstantInt>(MD->getOperand(0));
BaseAlign = CI->getLimitedValue();
}
APInt BaseAlign(Offset.getBitWidth(), getAlignment(Base, DL));
if (!BaseAlign) {
Type *Ty = Base->getType()->getPointerElementType();