// This is the entry block.
if (MBB->pred_empty()) {
- for (MachineBasicBlock::livein_iterator i = MBB->livein_begin(),
- e = MBB->livein_end(); i != e; ++i) {
- for (int rx : regIndices(*i)) {
+ for (const auto &LI : MBB->liveins()) {
+ for (int rx : regIndices(LI.PhysReg)) {
// Treat function live-ins as if they were defined just before the first
// instruction. Usually, function arguments are set up immediately
// before the call.
// completely.
bool anyregs = false;
const MachineRegisterInfo &MRI = mf.getRegInfo();
- for (TargetRegisterClass::const_iterator I = RC->begin(), E = RC->end();
- I != E && !anyregs; ++I)
- for (MCRegAliasIterator AI(*I, TRI, true); AI.isValid(); ++AI)
- if (!MRI.reg_nodbg_empty(*AI)) {
- anyregs = true;
- break;
- }
+ for (unsigned Reg : *RC) {
+ if (MRI.isPhysRegUsed(Reg)) {
+ anyregs = true;
+ break;
+ }
+ }
if (!anyregs) return false;
// Initialize the AliasMap on the first use.
AliasMap[*AI].push_back(i);
}
- MachineBasicBlock *Entry = MF->begin();
+ MachineBasicBlock *Entry = &*MF->begin();
ReversePostOrderTraversal<MachineBasicBlock*> RPOT(Entry);
SmallVector<MachineBasicBlock*, 16> Loops;
for (ReversePostOrderTraversal<MachineBasicBlock*>::rpo_iterator