[PATCH] D157265: [AMDGPU] Reorder atomic optimizer to avoid CAS loop.

[Pravin Jagtap via Phabricator via llvm-commits]

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Expand-Atomic pass emits the CAS loop for FP operations
which limits the optimizations offered by atomic optimizer.

Moving atomic optimizer before expand-atomics allows
better codegen.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D157265

Files:
  llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
  llvm/test/CodeGen/AMDGPU/GlobalISel/global-atomic-fadd.f32-no-rtn.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/global-atomic-fadd.f32-rtn.ll
  llvm/test/CodeGen/AMDGPU/atomic-optimizer-strict-wqm.ll
  llvm/test/CodeGen/AMDGPU/atomic_optimizations_pixelshader.ll
  llvm/test/CodeGen/AMDGPU/cgp-addressing-modes-gfx908.ll
  llvm/test/CodeGen/AMDGPU/global-atomic-fadd.f32-no-rtn.ll
  llvm/test/CodeGen/AMDGPU/global-atomic-fadd.f32-rtn.ll
  llvm/test/CodeGen/AMDGPU/global-atomics-fp.ll
  llvm/test/CodeGen/AMDGPU/llc-pipeline.ll
  llvm/test/CodeGen/AMDGPU/local-atomics-fp.ll
  llvm/test/CodeGen/AMDGPU/r600.global_atomics.ll

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