Merging r266824:
------------------------------------------------------------------------
r266824 | nhaehnle | 2016-04-19 14:58:17 -0700 (Tue, 19 Apr 2016) | 21 lines
AMDGPU/SI: SGPR accounting in getSIProgramInfo must ignore exec_lo/hi
Summary:
A shader stored the live mask (initial exec mask) in an SGPR which was then
spilled during register allocation. The allocator quite reasonably
optimized turned the spill into
v_writelane_b32 %vgpr, exec_lo, N
v_writelane_b32 %vgpr, exec_hi, N+1
at the beginning of the shader, confusing the SGPR accounting.
No test case, because si-sgpr-spill.ll together with an upcoming patch for
WQM handling exhibits the problem.
Reviewers: arsenm, tstellarAMD
Subscribers: arsenm, llvm-commits
Differential Revision: http://reviews.llvm.org/D19199
------------------------------------------------------------------------
llvm-svn: 271766
