[PATCH] D29848: AMDGPU: Constant fold rcp node

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
Herald added subscribers: tpr, tony-tye, yaxunl, nhaehnle, wdng, kzhuravl.

When doing arcp optimization with a constant denominator,
this was leaving behind rcps with constant inputs.


https://reviews.llvm.org/D29848

Files:
  lib/Target/AMDGPU/AMDGPUISelLowering.cpp
  test/CodeGen/AMDGPU/fdiv.f16.ll
  test/CodeGen/AMDGPU/fdiv.f64.ll
  test/CodeGen/AMDGPU/llvm.amdgcn.rcp.ll
  test/CodeGen/AMDGPU/rcp-pattern.ll

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