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AMDGPU/GlobalISel: Work around a selector crash 

Ideally types without a corresponding register class wouldn't reach
here, but we're currently missing some (in particular a 192-bit class
is missing).
This commit is contained in:
Matt Arsenault 2020-04-15 14:37:31 -04:00
parent 2bcbf1319e
commit 588bd7be36
1 changed files with 2 additions and 0 deletions
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2
llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
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@ -1627,6 +1627,8 @@ bool AMDGPUInstructionSelector::selectG_TRUNC(MachineInstr &I) const {
= TRI.getRegClassForSizeOnBank(SrcSize, *SrcRB, *MRI);
const TargetRegisterClass *DstRC
= TRI.getRegClassForSizeOnBank(DstSize, *DstRB, *MRI);
if (!SrcRC || !DstRC)
return false;
if (!RBI.constrainGenericRegister(SrcReg, *SrcRC, *MRI) ||
!RBI.constrainGenericRegister(DstReg, *DstRC, *MRI)) {