[PATCH] D17110: AMDGPU: Prepare for reducing private element size.

[Matt Arsenault via llvm-commits]

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

Tests for the new scalarize all private access options will be
included with a future commit.
    
The only functional change is to make the split/scalarize behavior
for private access of > 4 element vectors to be consistent
with the flat/global handling. This makes the spilling worse
in the two changed tests.

http://reviews.llvm.org/D17110

Files:
  lib/Target/AMDGPU/SIISelLowering.cpp
  test/CodeGen/AMDGPU/vgpr-spill-emergency-stack-slot-compute.ll
  test/CodeGen/AMDGPU/vgpr-spill-emergency-stack-slot.ll

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