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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
This commit is contained in:
Jakob Stoklund Olesen 2010-05-18 17:31:12 +00:00
parent d5563f420a
commit 4843178d6b
1 changed files with 5 additions and 2 deletions
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7
llvm/lib/CodeGen/MachineVerifier.cpp
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@ -635,11 +635,14 @@ MachineVerifier::visitMachineOperand(const MachineOperand *MO, unsigned MONum) {
// Virtual register.
const TargetRegisterClass *RC = MRI->getRegClass(Reg);
if (SubIdx) {
if (RC->subregclasses_begin()+SubIdx >= RC->subregclasses_end()) {
const TargetRegisterClass *SRC = RC->getSubRegisterRegClass(SubIdx);
if (!SRC) {
report("Invalid subregister index for virtual register", MO, MONum);
*OS << "Register class " << RC->getName()
<< " does not support subreg index " << SubIdx << "\n";
return;
}
RC = *(RC->subregclasses_begin()+SubIdx);
RC = SRC;
}
if (const TargetRegisterClass *DRC = TOI.getRegClass(TRI)) {
if (RC != DRC && !RC->hasSuperClass(DRC)) {