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Teach the machine code verifier to use getSubRegisterRegClass().
The old approach was wrong. It had an off-by-one error. llvm-svn: 104034
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@ -635,11 +635,14 @@ MachineVerifier::visitMachineOperand(const MachineOperand *MO, unsigned MONum) {
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// Virtual register.
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const TargetRegisterClass *RC = MRI->getRegClass(Reg);
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if (SubIdx) {
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if (RC->subregclasses_begin()+SubIdx >= RC->subregclasses_end()) {
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const TargetRegisterClass *SRC = RC->getSubRegisterRegClass(SubIdx);
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if (!SRC) {
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report("Invalid subregister index for virtual register", MO, MONum);
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*OS << "Register class " << RC->getName()
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<< " does not support subreg index " << SubIdx << "\n";
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return;
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}
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RC = *(RC->subregclasses_begin()+SubIdx);
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RC = SRC;
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}
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if (const TargetRegisterClass *DRC = TOI.getRegClass(TRI)) {
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if (RC != DRC && !RC->hasSuperClass(DRC)) {
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