regs = Desc.ImplicitDefs;
while (*regs)
RegsUsed[*regs++] = 1;
-
-
- /*
- for (int i = MI->getNumOperands() - 1; i >= 0; --i) {
- const MachineOperand &op = MI->getOperand(i);
- if (op.isMachineRegister())
- RegsUsed[op.getAllocatedRegNum()] = 1;
- }
-
- for (int i = MI->getNumImplicitRefs() - 1; i >= 0; --i) {
- const MachineOperand &op = MI->getImplicitOp(i);
- if (op.isMachineRegister())
- RegsUsed[op.getAllocatedRegNum()] = 1;
- }
- */
}
void cleanupAfterFunction() {
MachineBasicBlock::iterator opI = opBlock->end();
MachineInstr *opMI = *(--opI);
const MachineInstrInfo &MII = TM.getInstrInfo();
+ // must backtrack over ALL the branches in the previous block, until no more
+ while ((MII.isBranch(opMI->getOpcode()) || MII.isReturn(opMI->getOpcode()))
+ && opI != opBlock->begin())
+ {
+ opMI = *(--opI);
+ }
+ // move back to the first branch instruction so new instructions
+ // are inserted right in front of it and not in front of a non-branch
+ ++opI;
+
// insert the move just before the return/branch
if (MII.isReturn(opMI->getOpcode()) || MII.isBranch(opMI->getOpcode()))