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| author | Matt Arsenault <Matthew.Arsenault@amd.com> | 2016-11-24 00:26:40 +0000 |
|---|---|---|
| committer | Matt Arsenault <Matthew.Arsenault@amd.com> | 2016-11-24 00:26:40 +0000 |
| commit | 9e5c7b10316aca49605dd7cf5f4e6e4a3ab76cd6 (patch) | |
| tree | b163ccaf77708f0e9a1e3082c207e49e2d8b6d7b /llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp | |
| parent | 8812f28f47a74d32bdd14181ebfe906cbfcd7346 (diff) | |
| download | bcm5719-llvm-9e5c7b10316aca49605dd7cf5f4e6e4a3ab76cd6.tar.gz bcm5719-llvm-9e5c7b10316aca49605dd7cf5f4e6e4a3ab76cd6.zip | |
AMDGPU: Make m0 unallocatable
m0 may need to be written for spill code, so
we don't want general code uses relying on the
value stored in it.
This introduces a few code quality regressions where copies
from m0 are not coalesced into copies of a copy of m0.
llvm-svn: 287841
Diffstat (limited to 'llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp')
| -rw-r--r-- | llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp b/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp index 4d55a663d48..bf493c9fd38 100644 --- a/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp +++ b/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp @@ -253,7 +253,7 @@ SDNode *AMDGPUDAGToDAGISel::glueCopyToM0(SDNode *N) const { static unsigned selectSGPRVectorRegClassID(unsigned NumVectorElts) { switch (NumVectorElts) { case 1: - return AMDGPU::SReg_32RegClassID; + return AMDGPU::SReg_32_XM0RegClassID; case 2: return AMDGPU::SReg_64RegClassID; case 4: |
