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7e3dc40fab
we stopped efficiently lowering sextload using the SSE41 instructions for that operation. This is a consequence of a bad predicate I used thinking of the memory access needs. The code actually handles the cases where the predicate doesn't apply, and handles them much better. =] Simple fix and a test case added. Fixes PR20767. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216538 91177308-0d34-0410-b5e6-96231b3b80d8
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