static bool normalizeWeight(CodeGenRegister *Reg,
std::vector<UberRegSet> &UberSets,
std::vector<UberRegSet*> &RegSets,
+ std::set<unsigned> &NormalRegs,
CodeGenRegister::RegUnitList &NormalUnits,
CodeGenRegBank &RegBank) {
bool Changed = false;
+ if (!NormalRegs.insert(Reg->EnumValue).second)
+ return Changed;
+
const CodeGenRegister::SubRegMap &SRM = Reg->getSubRegs();
for (CodeGenRegister::SubRegMap::const_iterator SRI = SRM.begin(),
SRE = SRM.end(); SRI != SRE; ++SRI) {
if (SRI->second == Reg)
continue; // self-cycles happen
- Changed |=
- normalizeWeight(SRI->second, UberSets, RegSets, NormalUnits, RegBank);
+ Changed |= normalizeWeight(SRI->second, UberSets, RegSets,
+ NormalRegs, NormalUnits, RegBank);
}
// Postorder register normalization.
Changed = false;
for (unsigned i = 0, e = Registers.size(); i != e; ++i) {
CodeGenRegister::RegUnitList NormalUnits;
- Changed |=
- normalizeWeight(Registers[i], UberSets, RegSets, NormalUnits, *this);
+ std::set<unsigned> NormalRegs;
+ Changed |= normalizeWeight(Registers[i], UberSets, RegSets,
+ NormalRegs, NormalUnits, *this);
}
}
}