[PATCH] D51933: [AMDGPU] Ensure trig range reduction only used for subtargets that require it

[David Stuttard via Phabricator via llvm-commits]

dstuttard created this revision.
Herald added subscribers: llvm-commits, t-tye, tpr, yaxunl, nhaehnle, wdng, jvesely, kzhuravl, arsenm.

GFX9 and above support sin/cos instructions with a greater range and thus don't
require a fract instruction prior to invocation.

Added a subtarget feature to reflect this and added code to take advantage of
expanded range on GFX9+

Also updated the tests to check correct behaviour


Repository:
  rL LLVM

https://reviews.llvm.org/D51933

Files:
  lib/Target/AMDGPU/AMDGPU.td
  lib/Target/AMDGPU/AMDGPUSubtarget.cpp
  lib/Target/AMDGPU/AMDGPUSubtarget.h
  lib/Target/AMDGPU/SIISelLowering.cpp
  test/CodeGen/AMDGPU/llvm.cos.f16.ll
  test/CodeGen/AMDGPU/llvm.sin.f16.ll
  test/CodeGen/AMDGPU/llvm.sin.ll

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