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| author | Marek Olsak <marek.olsak@amd.com> | 2016-01-13 17:23:20 +0000 |
|---|---|---|
| committer | Marek Olsak <marek.olsak@amd.com> | 2016-01-13 17:23:20 +0000 |
| commit | 46dadbfab2fe9504b0d145283f0b7258abcff6a9 (patch) | |
| tree | 25fb52c4ca2ff7804e2309007a4cec7fc5840a04 /llvm/lib/Target/AMDGPU/SIISelLowering.cpp | |
| parent | 774c0d689f43ad52699e774ddb18db957205abd6 (diff) | |
| download | bcm5719-llvm-46dadbfab2fe9504b0d145283f0b7258abcff6a9.tar.gz bcm5719-llvm-46dadbfab2fe9504b0d145283f0b7258abcff6a9.zip | |
AMDGPU/SI: Fix a GPU hang with POS_W_FLOAT enabled
Reviewers: tstellarAMD, arsenm
Subscribers: arsenm
Differential Revision: http://reviews.llvm.org/D16037
llvm-svn: 257625
Diffstat (limited to 'llvm/lib/Target/AMDGPU/SIISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/AMDGPU/SIISelLowering.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp index 4206e6fb869..544867513d9 100644 --- a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp +++ b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp @@ -646,8 +646,15 @@ SDValue SITargetLowering::LowerFormalArguments( // based on run-time states. Since we can't know what the final PSInputEna // will look like, so we shouldn't do anything here and the user should take // responsibility for the correct programming. + // + // Otherwise, the following restrictions apply: + // - At least one of PERSP_* (0xF) or LINEAR_* (0x70) must be enabled. + // - If POS_W_FLOAT (11) is enabled, at least one of PERSP_* must be + // enabled too. if (Info->getShaderType() == ShaderType::PIXEL && - (Info->getPSInputAddr() & 0x7F) == 0) { + ((Info->getPSInputAddr() & 0x7F) == 0 || + ((Info->getPSInputAddr() & 0xF) == 0 && + Info->isPSInputAllocated(11)))) { CCInfo.AllocateReg(AMDGPU::VGPR0); CCInfo.AllocateReg(AMDGPU::VGPR1); Info->markPSInputAllocated(0); |
