+
+ /// GetRegForReload - Helper for the above GetRegForReload(). Add a
+ /// 'Rejected' set to remember which registers have been considered and
+ /// rejected for the reload. This avoids infinite looping in case like
+ /// this:
+ /// t1 := op t2, t3
+ /// t2 <- assigned r0 for use by the reload but ended up reuse r1
+ /// t3 <- assigned r1 for use by the reload but ended up reuse r0
+ /// t1 <- desires r1
+ /// sees r1 is taken by t2, tries t2's reload register r0
+ /// sees r0 is taken by t3, tries t3's reload register r1
+ /// sees r1 is taken by t2, tries t2's reload register r0 ...
+ unsigned GetRegForReload(unsigned PhysReg, MachineInstr *MI,
+ AvailableSpills &Spills,
+ std::map<int, MachineInstr*> &MaybeDeadStores) {
+ std::set<unsigned> Rejected;
+ return GetRegForReload(PhysReg, MI, Spills, MaybeDeadStores, Rejected);
+ }