// Clear "do not change" set.
KeepRegs.reset();
- bool IsReturnBlock = (BBSize != 0 && BB->back().isReturn());
+ bool IsReturnBlock = BB->isReturnBlock();
// Examine the live-in regs of all successors.
for (MachineBasicBlock::succ_iterator SI = BB->succ_begin(),
SE = BB->succ_end(); SI != SE; ++SI)
- for (MachineBasicBlock::livein_iterator I = (*SI)->livein_begin(),
- E = (*SI)->livein_end(); I != E; ++I) {
- for (MCRegAliasIterator AI(*I, TRI, true); AI.isValid(); ++AI) {
+ for (const auto &LI : (*SI)->liveins()) {
+ for (MCRegAliasIterator AI(LI.PhysReg, TRI, true); AI.isValid(); ++AI) {
unsigned Reg = *AI;
Classes[Reg] = reinterpret_cast<TargetRegisterClass *>(-1);
KillIndices[Reg] = BBSize;