[PATCH] D50376: AMDGPU: Fix enabling denormals by default on pre-VI targets

[Matt Arsenault via Phabricator via cfe-commits]

arsenm created this revision.
arsenm added reviewers: b-sumner, kzhuravl.
Herald added subscribers: t-tye, tpr, dstuttard, yaxunl, nhaehnle, wdng.

Fast FMAF is not a sufficient condition to enable denormals.
Before VI, enabling denormals caused https://reviews.llvm.org/F32 instructions to
run at https://reviews.llvm.org/F64 speeds.


https://reviews.llvm.org/D50376

Files:
  lib/Basic/Targets/AMDGPU.cpp
  lib/Basic/Targets/AMDGPU.h
  test/CodeGenOpenCL/denorms-are-zero.cl

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