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Commit 8bc4a0ba authored by Arnold Schwaighofer's avatar Arnold Schwaighofer
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SLPVectorizer: Fix stale for Value pointer array 

We are slicing an array of Value pointers and process those slices in a loop.
The problem is that we might invalidate a later slice by vectorizing a former
slice.

Use a WeakVH to track the pointer. If the pointer is deleted or RAUW'ed we can
tell.

The test case will only fail when running with libgmalloc.

radar://15498655

llvm-svn: 195162
parent 5f7c48eb
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