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Author SHA1 Message Date
Matt Arsenault a1fe17c9ad AMDGPU: Change fdiv lowering based on !fpmath metadata 
If 2.5 ulp is acceptable, denormals are not required, and
isn't a reciprocal which will already be handled, replace
with a faster fdiv.

Simplify the lowering tests by using per function
subtarget features.

llvm-svn: 276051
 2016-07-19 23:16:53 +00:00
Matt Arsenault 86de486d31 AMDGPU: Add stub custom CodeGenPrepare pass 
This will do various things including ones
CodeGenPrepare does, but with knowledge of uniform
values.

llvm-svn: 273657
 2016-06-24 07:07:55 +00:00