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Commit afa1cb6d authored by Evan Cheng's avatar Evan Cheng
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Fix a bogus check that prevented folding VECTOR_SHUFFLE to UNDEF; add an... 

Fix a bogus check that prevented folding VECTOR_SHUFFLE to UNDEF; add an optimization to fold VECTOR_SHUFFLE to a zero vector.

llvm-svn: 37173
parent 632c3f01
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