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R600/SI: Handle VCC in SIRegisterInfo::getPhysRegSubReg()
This fixes a crash in an ocl conformance test. The test requries register spilling and is too big to include. llvm-svn: 216216
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@ -148,6 +148,17 @@ const TargetRegisterClass *SIRegisterInfo::getSubRegClass(
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unsigned SIRegisterInfo::getPhysRegSubReg(unsigned Reg,
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const TargetRegisterClass *SubRC,
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unsigned Channel) const {
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switch (Reg) {
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case AMDGPU::VCC:
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switch(Channel) {
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case 0: return AMDGPU::VCC_LO;
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case 1: return AMDGPU::VCC_HI;
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default: llvm_unreachable("Invalid SubIdx for VCC");
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}
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break;
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}
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unsigned Index = getHWRegIndex(Reg);
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return SubRC->getRegister(Index + Channel);
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}
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