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r277500 | nha | 2016-08-02 12:17:37 -0700 (Tue, 02 Aug 2016) | 17 lines
AMDGPU: Track physical registers in SIWholeQuadMode
Summary:
There are cases where uniform branch conditions are computed in VGPRs, and
we didn't correctly mark those as WQM.
The stray change in basic-branch.ll is because invoking the LiveIntervals
analysis leads to the detection of a dead register that would otherwise not
be seen at -O0.
This is a candidate for the 3.9 branch, as it fixes a possible hang.
Reviewers: arsenm, tstellarAMD, mareko
Subscribers: arsenm, llvm-commits, kzhuravl
Differential Revision: https://reviews.llvm.org/D22673
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_39@277619 91177308-0d34-0410-b5e6-96231b3b80d8
