Lines Matching defs:Lo

35   bool detectFoldable(MachineInstr &Hi, MachineInstr *&Lo);
37   bool detectAndFoldOffset(MachineInstr &Hi, MachineInstr &Lo);
38   void foldOffset(MachineInstr &Hi, MachineInstr &Lo, MachineInstr &Tail,
40   bool foldLargeOffset(MachineInstr &Hi, MachineInstr &Lo,
42   bool foldShiftedOffset(MachineInstr &Hi, MachineInstr &Lo,
45   bool foldIntoMemoryOps(MachineInstr &Hi, MachineInstr &Lo);
86                                              MachineInstr *&Lo) {
103     // setting Lo and Hi both point to PseudoMovAddr
104     Lo = &Hi;
110     Lo = &*MRI->use_instr_begin(HiDestReg);
111     if (Lo->getOpcode() != RISCV::ADDI)
115   const MachineOperand &LoOp2 = Lo->getOperand(2);
142 // Update the offset in Hi and Lo instructions.
144 // output from Lo.
145 void RISCVMergeBaseOffsetOpt::foldOffset(MachineInstr &Hi, MachineInstr &Lo,
148   // Put the offset back in Hi and the Lo
151     Lo.getOperand(2).setOffset(Offset);
153   MRI->constrainRegClass(Lo.getOperand(0).getReg(),
155   MRI->replaceRegWith(Tail.getOperand(0).getReg(), Lo.getOperand(0).getReg());
158                     << "     " << Hi << "     " << Lo;);
162 // If the pattern is found, updates the offset in Hi and Lo instructions
167 //                       Lo:  addi  vreg2, vreg1, %lo(s)
182                                               MachineInstr &Lo,
208       foldOffset(Hi, Lo, TailAdd, OffLo);
229     foldOffset(Hi, Lo, TailAdd, Offset);
238     foldOffset(Hi, Lo, TailAdd, Offset);
249 // If the pattern is found, updates the offset in Hi and Lo instructions
253 // Lo:         addi    vreg2, vreg1, %lo(s)
257                                                 MachineInstr &Lo,
297   foldOffset(Hi, Lo, TailShXAdd, Offset);
303                                                   MachineInstr &Lo) {
304   Register DestReg = Lo.getOperand(0).getReg();
312   // Lo has only one use.
330         foldOffset(Hi, Lo, TailTail, Offset);
337     foldOffset(Hi, Lo, Tail, Offset);
349     return foldLargeOffset(Hi, Lo, Tail, DestReg);
356     return foldShiftedOffset(Hi, Lo, Tail, DestReg);
363                                                 MachineInstr &Lo) {
364   Register DestReg = Lo.getOperand(0).getReg();
370   // Lo:   addi vreg2, vreg1, %lo(foo)  --->  lw vreg3, lo(foo+8)(vreg1)
375   // Lo:   addi  vreg2, vreg1, %pcrel_lo(1b) ---> lw vreg3, %pcrel_lo(1b)(vreg1)
409       // Register defined by Lo should not be the value register.
487   MachineOperand &ImmOp = Lo.getOperand(2);
530   // Prevent Lo (originally PseudoMovAddr, which is also pointed by Hi) from
532   if (&Lo == &Hi)
535   MRI->replaceRegWith(Lo.getOperand(0).getReg(), Hi.getOperand(0).getReg());
536   Lo.eraseFromParent();
551       MachineInstr *Lo = nullptr;
552       if (!detectFoldable(Hi, Lo))
554       MadeChange |= detectAndFoldOffset(Hi, *Lo);
555       MadeChange |= foldIntoMemoryOps(Hi, *Lo);