[PATCH] D26946: TRI: Add hook to pass scavenger during frame elimination

[Matt Arsenault via llvm-commits]

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

The scavenger was not passed if requiresFrameIndexScavenging was
enabled. I need to be able to test for the availability of an
unallocatable register here, so I can't create a virtual register for it.

      

It might be better to just always use the scavenger and stop
creating virtual registers.


https://reviews.llvm.org/D26946

Files:
  include/llvm/Target/TargetRegisterInfo.h
  lib/CodeGen/PrologEpilogInserter.cpp
  lib/Target/AMDGPU/SIRegisterInfo.cpp
  lib/Target/AMDGPU/SIRegisterInfo.h

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