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R600/SI: Handle VCC in SIRegisterInfo::getPhysRegSubReg()

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This fixes a crash in an ocl conformance test.  The test requries
register spilling and is too big to include.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216216 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tom Stellard 2014-08-21 20:40:50 +00:00
parent 3fd7e37b34
commit a07c0778ca
1 changed files with 11 additions and 0 deletions
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11
lib/Target/R600/SIRegisterInfo.cpp
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@ -148,6 +148,17 @@ const TargetRegisterClass *SIRegisterInfo::getSubRegClass(
unsigned SIRegisterInfo::getPhysRegSubReg(unsigned Reg,
const TargetRegisterClass *SubRC,
unsigned Channel) const {
switch (Reg) {
case AMDGPU::VCC:
switch(Channel) {
case 0: return AMDGPU::VCC_LO;
case 1: return AMDGPU::VCC_HI;
default: llvm_unreachable("Invalid SubIdx for VCC");
}
break;
}
unsigned Index = getHWRegIndex(Reg);
return SubRC->getRegister(Index + Channel);
}