diff options
Diffstat (limited to 'llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp')
| -rw-r--r-- | llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp b/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp index 30920a0bb93..1315b6a7b3a 100644 --- a/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp +++ b/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp @@ -41,6 +41,10 @@ BitVector SIRegisterInfo::getReservedRegs(const MachineFunction &MF) const { reserveRegisterTuples(Reserved, AMDGPU::EXEC); reserveRegisterTuples(Reserved, AMDGPU::FLAT_SCR); + // Reserve the last 2 registers so we will always have at least 2 more that + // will physically contain VCC. + reserveRegisterTuples(Reserved, AMDGPU::SGPR102_SGPR103); + // Tonga and Iceland can only allocate a fixed number of SGPRs due // to a hw bug. if (MF.getSubtarget<AMDGPUSubtarget>().hasSGPRInitBug()) { |
