}
SmallVector<unsigned, 8> PartialDefs;
- DEBUG(dbgs() << "Allocating tied uses and early clobbers.\n");
+ DEBUG(dbgs() << "Allocating tied uses.\n");
for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
MachineOperand &MO = MI->getOperand(i);
if (!MO.isReg()) continue;
// That would confuse the later phys-def processing pass.
LiveRegMap::iterator LRI = reloadVirtReg(MI, i, Reg, 0);
PartialDefs.push_back(LRI->second.PhysReg);
- } else if (MO.isEarlyClobber()) {
- // Note: defineVirtReg may invalidate MO.
- LiveRegMap::iterator LRI = defineVirtReg(MI, i, Reg, 0);
- unsigned PhysReg = LRI->second.PhysReg;
- if (setPhysReg(MI, i, PhysReg))
- VirtDead.push_back(Reg);
}
}
+ DEBUG(dbgs() << "Allocating early clobbers.\n");
+ for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
+ MachineOperand &MO = MI->getOperand(i);
+ if (!MO.isReg()) continue;
+ unsigned Reg = MO.getReg();
+ if (!TargetRegisterInfo::isVirtualRegister(Reg)) continue;
+ if (!MO.isEarlyClobber())
+ continue;
+ // Note: defineVirtReg may invalidate MO.
+ LiveRegMap::iterator LRI = defineVirtReg(MI, i, Reg, 0);
+ unsigned PhysReg = LRI->second.PhysReg;
+ if (setPhysReg(MI, i, PhysReg))
+ VirtDead.push_back(Reg);
+ }
+
// Restore UsedInInstr to a state usable for allocating normal virtual uses.
UsedInInstr.reset();
for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
// and return are tail calls; do not do this for them. The tail callee need
// not take the same registers as input that it produces as output, and there
// are dependencies for its input registers elsewhere.
- if (!MBB->empty() && MBB->back().getDesc().isReturn() &&
- !MBB->back().getDesc().isCall()) {
+ if (!MBB->empty() && MBB->back().isReturn() &&
+ !MBB->back().isCall()) {
MachineInstr *Ret = &MBB->back();
for (MachineRegisterInfo::liveout_iterator
}
unsigned DefOpEnd = MI->getNumOperands();
- if (MCID.isCall()) {
+ if (MI->isCall()) {
// Spill all virtregs before a call. This serves two purposes: 1. If an
// exception is thrown, the landing pad is going to expect to find
// registers in their spill slots, and 2. we don't have to wade through
TM = &Fn.getTarget();
TRI = TM->getRegisterInfo();
TII = TM->getInstrInfo();
+ MRI->freezeReservedRegs(Fn);
RegClassInfo.runOnMachineFunction(Fn);
UsedInInstr.resize(TRI->getNumRegs());