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Commit cdd1cd71 authored by Craig Topper's avatar Craig Topper
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[X86] Don't form masked instructions if the operation has an additional user. 

This will cause the operation to be repeated in both a mask and another masked
or unmasked form. This can a wasted of execution resources.

Differential Revision: https://reviews.llvm.org/D60940
parent c6824883
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