[PATCH] D24672: AMDGPU/SI: Eliminate more instructions that truncate inputs to 24-bit ops

[Tom Stellard via llvm-commits]

tstellarAMD created this revision.
tstellarAMD added a reviewer: arsenm.
tstellarAMD added a subscriber: llvm-commits.
Herald added subscribers: yaxunl, nhaehnle, wdng, kzhuravl, arsenm.

This wasn't working in the case where the truncate operation (e.g. and x,
0xffffff) had more than one use.

https://reviews.llvm.org/D24672

Files:
  lib/Target/AMDGPU/AMDGPUISelLowering.cpp
  lib/Target/AMDGPU/AMDGPUISelLowering.h
  test/CodeGen/AMDGPU/mad_uint24.ll
  test/CodeGen/AMDGPU/mul_uint24.ll

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