tree 7ed7d47313cffc04b6fda540783f703b64832ecc
parent 8310438f26309f7817aa96ed81853ed5f9a69907
author Tom Stellard <thomas.stellard@amd.com> 1465011786 +0000
committer Tom Stellard <thomas.stellard@amd.com> 1465011786 +0000

Merging r268287:

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r268287 | thomas.stellard | 2016-05-02 12:37:56 -0700 (Mon, 02 May 2016) | 19 lines

AMDGPU/SI: Set the kill flag on temp VGPRs used to restore SGPRs from scratch

Summary:
When we restore an SGPR value from scratch, we first load it into a
temporary VGPR and then use v_readlane_b32 to copy the value from the
VGPR back into an SGPR.

We weren't setting the kill flag on the VGPR in the v_readlane_b32
instruction, so the register scavenger wasn't able to re-use this
temp value later.

I wasn't able to create a lit test for this.

Reviewers: arsenm

Subscribers: arsenm, llvm-commits

Differential Revision: http://reviews.llvm.org/D19744

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llvm-svn: 271770