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fix PR6332, allowing an index of zero into a zero sized array 

even if the element of the array has no size.

llvm-svn: 101662
This commit is contained in:
Chris Lattner 2010-04-17 19:02:33 +00:00
parent b927073f2e
commit 0a8d91a816
2 changed files with 10 additions and 2 deletions
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4
llvm/lib/Target/TargetData.cpp
View File

@ -630,8 +630,8 @@ uint64_t TargetData::getIndexedOffset(const Type *ptrTy, Value* const* Indices,
Ty = cast<SequentialType>(Ty)->getElementType();
// Get the array index and the size of each array element.
int64_t arrayIdx = cast<ConstantInt>(Indices[CurIDX])->getSExtValue();
Result += arrayIdx * (int64_t)getTypeAllocSize(Ty);
if (int64_t arrayIdx = cast<ConstantInt>(Indices[CurIDX])->getSExtValue())
Result += arrayIdx * (int64_t)getTypeAllocSize(Ty);
}
}

8
llvm/test/CodeGen/Generic/crash.ll Normal file
View File

@ -0,0 +1,8 @@
; RUN: llc %s -o -
; PR6332
%struct.AVCodecTag = type opaque
@ff_codec_bmp_tags = external global [0 x %struct.AVCodecTag]
@tags = global [1 x %struct.AVCodecTag*] [%struct.AVCodecTag* getelementptr
inbounds ([0 x %struct.AVCodecTag]* @ff_codec_bmp_tags, i32 0, i32 0)]