Lines Matching defs:InitReg

1273   // Map from <LoopReg, InitReg> to phi register for all created phis. Note that
1274   // this map is only used when InitReg is non-undef.
1276   // Map from LoopReg to phi register where the InitReg is undef.
1282   // Insert a phi that carries LoopReg from the loop body and InitReg otherwise.
1283   // If InitReg is not given it is chosen arbitrarily. It will either be undef
1285   Register phi(Register LoopReg, std::optional<Register> InitReg = {},
1470 Register KernelRewriter::phi(Register LoopReg, std::optional<Register> InitReg,
1473   if (InitReg) {
1474     auto I = Phis.find({LoopReg, *InitReg});
1484   // InitReg is either undef or no existing phi takes InitReg as input. Try and
1489     if (!InitReg)
1493     // Found a phi taking undef as input, so rewrite it to take InitReg.
1495     MI->getOperand(1).setReg(*InitReg);
1496     Phis.insert({{LoopReg, *InitReg}, R});
1498         MRI.constrainRegClass(R, MRI.getRegClass(*InitReg));
1509   if (InitReg) {
1511         MRI.constrainRegClass(R, MRI.getRegClass(*InitReg));
1516       .addReg(InitReg ? *InitReg : undef(RC))
1520   if (!InitReg)
1523     Phis[{LoopReg, *InitReg}] = R;
2321     unsigned InitReg = 0;
2326       getPhiRegs(*DefInst, OrigKernel, InitReg, LoopReg);
2340       NewReg = InitReg;
2501       unsigned InitReg, LoopReg;
2502       getPhiRegs(*Phi, OrigKernel, InitReg, LoopReg);
2503       Register NewInit = MRI.createVirtualRegister(MRI.getRegClass(InitReg));
2506           .addReg(InitReg)
2510       replacePhiSrc(*Phi, InitReg, NewInit, NewPreheader);