Chandler Carruth 585bfc8443 [x86] Fix PR34377 by disabling cmov conversion when we relied on it
performing a zext of a register.

On the PR there is discussion of how to more effectively handle this,
but this patch prevents us from miscompiling code.

Differential Revision: https://reviews.llvm.org/D37504

llvm-svn: 312620
2017-09-06 06:28:08 +00:00
..
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