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Author SHA1 Message Date
Stanislav Mekhanoshin
3499304a9a [AMDGPU] Turn s_and_saveexec_b64 into s_and_b64 if result is unused 
With SI_END_CF elimination for some nested control flow we can now
eliminate saved exec register completely by turning a saveexec version
of instruction into just a logical instruction.

Differential Revision: https://reviews.llvm.org/D36007

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@309766 91177308-0d34-0410-b5e6-96231b3b80d8
 2017-08-01 23:44:35 +00:00