void PEI::calculateCallerSavedRegisters(MachineFunction &Fn) {
const MRegisterInfo *RegInfo = Fn.getTarget().getRegisterInfo();
const TargetFrameInfo *TFI = Fn.getTarget().getFrameInfo();
+ const TargetInstrInfo &TII = *Fn.getTarget().getInstrInfo();
// Get the callee saved register list...
const unsigned *CSRegs = RegInfo->getCalleeSaveRegs();
"Register allocation must be performed!");
ModifiedRegs[MO.getReg()] = true; // Register is modified
}
+
+ // Mark any implicitly defined registers as being modified.
+ for (const unsigned *ImpDefs = TII.getImplicitDefs(I->getOpcode());
+ *ImpDefs; ++ImpDefs)
+ ModifiedRegs[*ImpDefs] = true;
}
++I;
}