[PATCH] D19147: AMDGPU: Enable LocalStackSlotAllocation pass

[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.

This resolves more frame indexes early and folds
the immediate offsets into the scratch mubuf instructions.
    
This cleans up a lot of the mess that's currently emitted,
such as emitting add 0s and repeatedly initializing the same
register to 0 when spilling.

http://reviews.llvm.org/D19147

Files:
  lib/Target/AMDGPU/SIRegisterInfo.cpp
  lib/Target/AMDGPU/SIRegisterInfo.h
  test/CodeGen/AMDGPU/array-ptr-calc-i32.ll
  test/CodeGen/AMDGPU/captured-frame-index.ll

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