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Revert a patch that is unsafe, due to out of range array accesses in inner

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array scopes possibly accessing valid memory in outer subscripts.

llvm-svn: 28478
This commit is contained in:
Chris Lattner 2006-05-25 21:25:12 +00:00
parent 227c09e7d2
commit d3eff919d8
1 changed files with 2 additions and 2 deletions
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4
lib/Transforms/Utils/Local.cpp
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@ -274,7 +274,7 @@ Constant *llvm::ConstantFoldLoadThroughGEPConstantExpr(Constant *C,
} else if (ConstantInt *CI = dyn_cast<ConstantInt>(I.getOperand())) {
if (const ArrayType *ATy = dyn_cast<ArrayType>(*I)) {
if ((uint64_t)CI->getRawValue() >= ATy->getNumElements())
C = UndefValue::get(ATy->getElementType());
return 0;
if (ConstantArray *CA = dyn_cast<ConstantArray>(C))
C = CA->getOperand((unsigned)CI->getRawValue());
else if (isa<ConstantAggregateZero>(C))
@ -285,7 +285,7 @@ Constant *llvm::ConstantFoldLoadThroughGEPConstantExpr(Constant *C,
return 0;
} else if (const PackedType *PTy = dyn_cast<PackedType>(*I)) {
if ((uint64_t)CI->getRawValue() >= PTy->getNumElements())
C = UndefValue::get(PTy->getElementType());
return 0;
if (ConstantPacked *CP = dyn_cast<ConstantPacked>(C))
C = CP->getOperand((unsigned)CI->getRawValue());
else if (isa<ConstantAggregateZero>(C))