[PATCH] D24273: AMDGPU: Fix immediate folding logic when shrinking instructions

[Matt Arsenault via llvm-commits]

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

If the literal is being folded into src0, it doesn't matter
if it's an SGPR because it's being replaced with the literal.
    
Also fixes initially selecting 32-bit versions of some instructions
which also confused commuting.

https://reviews.llvm.org/D24273

Files:
  lib/Target/AMDGPU/SIInstrInfo.cpp
  lib/Target/AMDGPU/SIInstructions.td
  lib/Target/AMDGPU/SIShrinkInstructions.cpp
  test/CodeGen/AMDGPU/ctlz.ll
  test/CodeGen/AMDGPU/fneg-fabs.ll
  test/CodeGen/AMDGPU/half.ll
  test/CodeGen/AMDGPU/llvm.amdgcn.rsq.clamp.ll
  test/CodeGen/AMDGPU/or.ll
  test/CodeGen/AMDGPU/s_movk_i32.ll
  test/CodeGen/AMDGPU/si-literal-folding.ll

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