for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i)
if (MI->getOperand(i).isReg()) {
unsigned Reg = MI->getOperand(i).getReg();
- if (Reg == 0 || !TargetRegisterInfo::isVirtualRegister(Reg))
+ if (Reg == 0)
continue;
+ if (!TargetRegisterInfo::isVirtualRegister(Reg)) {
+ // If we have an active scavenged register, we shouldn't be
+ // seeing any references to it.
+ assert (Reg != CurrentScratchReg
+ && "overlapping use of scavenged frame index register!");
+ continue;
+ }
// If we already have a scratch for this virtual register, use it
if (Reg != CurrentVirtReg) {
// If this is the last use of the register, stop tracking it.
if (MI->getOperand(i).isKill())
- CurrentVirtReg = 0;
+ CurrentScratchReg = CurrentVirtReg = 0;
}
RS->forward(MI);
}