[PATCH] D131560: AMDGPU: Improve atomicrmw fadd selection

[Petar Avramovic via Phabricator via llvm-commits]

Petar.Avramovic created this revision.
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Don't expand atomicrmw fadd for targets with corresponding instruction.
Affects gfx908 and gfx11. Add missing globalisel legalizer support for
flat atomicrmw fadd f32 on gfx940 and gfx11.
Isel support for gfx11 will be added in D130579 <https://reviews.llvm.org/D130579>.


https://reviews.llvm.org/D131560

Files:
  llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
  llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp
  llvm/lib/Target/AMDGPU/SIISelLowering.cpp
  llvm/test/CodeGen/AMDGPU/GlobalISel/flat-atomic-fadd-f32.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/fp-atomics-gfx940.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/llvm.amdgcn.global.atomic.fadd-with-ret.ll
  llvm/test/CodeGen/AMDGPU/global-atomics-fp.ll

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