[PATCH] D27272: AMDGPU/SI: Don't move copies of immediates to the VALU

[Tom Stellard via Phabricator via llvm-commits]

tstellarAMD created this revision.
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If we write an immediate to a VGPR and then copy the VGPR to an
SGPR, we can replace the copy with a S_MOV_B32 sgpr, imm, rather than
moving the copy to the SALU.


https://reviews.llvm.org/D27272

Files:
  lib/Target/AMDGPU/SIFixSGPRCopies.cpp
  test/CodeGen/AMDGPU/salu-to-valu.ll

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