Teach the machine code verifier to use getSubRegisterRegClass().
The old approach was wrong. It had an off-by-one error.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104034 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineVerifier.cpp b/lib/CodeGen/MachineVerifier.cpp
index fdfe2cb..8baf01c 100644
--- a/lib/CodeGen/MachineVerifier.cpp
+++ b/lib/CodeGen/MachineVerifier.cpp
@@ -635,11 +635,14 @@
// 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)) {