[PATCH] D13086: AMDGPU: Optimize VOP2 operand legalization

[Matt Arsenault via llvm-commits]

arsenm created this revision.
arsenm added a reviewer: tstellarAMD.
arsenm added a subscriber: llvm-commits.
Herald added a subscriber: arsenm.

Don't use commuteInstruction, and don't commute if
doing so will not improve legality.
    
With this patch and others leading up to it, this
reduces the compile time of SIFixSGPRCopies on
some of the LuxMark 2 kernels from ~8ms to ~5ms
on my system.


http://reviews.llvm.org/D13086

Files:
  lib/Target/AMDGPU/SIInstrInfo.cpp
  lib/Target/AMDGPU/SIInstrInfo.h

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