Lines Matching defs:InitReg

1274   // Map from <LoopReg, InitReg> to phi register for all created phis. Note that
1275   // this map is only used when InitReg is non-undef.
1277   // Map from LoopReg to phi register where the InitReg is undef.
1283   // Insert a phi that carries LoopReg from the loop body and InitReg otherwise.
1284   // If InitReg is not given it is chosen arbitrarily. It will either be undef
1286   Register phi(Register LoopReg, std::optional<Register> InitReg = {},
1471 Register KernelRewriter::phi(Register LoopReg, std::optional<Register> InitReg,
1474   if (InitReg) {
1475     auto I = Phis.find({LoopReg, *InitReg});
1485   // InitReg is either undef or no existing phi takes InitReg as input. Try and
1490     if (!InitReg)
1494     // Found a phi taking undef as input, so rewrite it to take InitReg.
1496     MI->getOperand(1).setReg(*InitReg);
1497     Phis.insert({{LoopReg, *InitReg}, R});
1499         MRI.constrainRegClass(R, MRI.getRegClass(*InitReg));
1510   if (InitReg) {
1512         MRI.constrainRegClass(R, MRI.getRegClass(*InitReg));
1517       .addReg(InitReg ? *InitReg : undef(RC))
1521   if (!InitReg)
1524     Phis[{LoopReg, *InitReg}] = R;
2322     unsigned InitReg = 0;
2327       getPhiRegs(*DefInst, OrigKernel, InitReg, LoopReg);
2341       NewReg = InitReg;
2502       unsigned InitReg, LoopReg;
2503       getPhiRegs(*Phi, OrigKernel, InitReg, LoopReg);
2504       Register NewInit = MRI.createVirtualRegister(MRI.getRegClass(InitReg));
2507           .addReg(InitReg)
2511       replacePhiSrc(*Phi, InitReg, NewInit, NewPreheader);