[PATCH] D12283: AMDGPU: Handle sub of constant for DS offset folding

[Matt Arsenault via llvm-commits]

arsenm created this revision.
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sub C, x - > add (sub 0, v), C for DS offsets.
    
This is mostly to fix regressions that show up when SeparateConstOffsetFromGEP is enabled.


http://reviews.llvm.org/D12283

Files:
  lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
  test/CodeGen/AMDGPU/ds-sub-offset.ll

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