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Fix the last crasher I've gotten a reproduction for in SROA. This one

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from the dragonegg build bots when we turned on the full version of the
pass. Included a much reduced test case for this pesky bug, despite
bugpoint's uncooperative behavior.

Also, I audited all the similar code I could find and didn't spot any
other cases where this mistake cropped up.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164178 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth
2012-09-18 22:37:19 +00:00
parent a177a51108
commit 38f35fd3b7
2 changed files with 22 additions and 0 deletions
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2
lib/Transforms/Scalar/SROA.cpp
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@ -1487,6 +1487,8 @@ static Value *getNaturalGEPWithOffset(IRBuilder<> &IRB, const TargetData &TD,
return 0;
Type *ElementTy = Ty->getElementType();
if (!ElementTy->isSized())
return 0; // We can't GEP through an unsized element.
APInt ElementSize(Offset.getBitWidth(), TD.getTypeAllocSize(ElementTy));
if (ElementSize == 0)
return 0; // Zero-length arrays can't help us build a natural GEP.