lib/CodeGen/PeepholeOptimizer.cpp

308     void addSource(unsigned SrcReg, unsigned SrcSubReg) {
309       RegSrcs.push_back(RegSubRegPair(SrcReg, SrcSubReg));
312     void setSource(int Idx, unsigned SrcReg, unsigned SrcSubReg) {
314       RegSrcs[Idx] = RegSubRegPair(SrcReg, SrcSubReg);
460   unsigned SrcReg, DstReg, SubIdx;
461   if (!TII->isCoalescableExtInstr(MI, SrcReg, DstReg, SubIdx))
465       Register::isPhysicalRegister(SrcReg))
468   if (MRI->hasOneNonDBGUse(SrcReg))
479   // The ext instr may be operating on a sub-register of SrcReg as well.
482   // If UseSrcSubIdx is Set, SubIdx also applies to SrcReg, and only uses of
483   // SrcReg:SubIdx should be replaced.
485       TRI->getSubClassWithSubReg(MRI->getRegClass(SrcReg), SubIdx) != nullptr;
500   for (MachineOperand &UseMO : MRI->use_nodbg_operands(SrcReg)) {
510     // Only accept uses of SrcReg:SubIdx.
571     const TargetRegisterClass *RC = MRI->getRegClass(SrcReg);
589       // SubIdx applies to both SrcReg and DstReg when UseSrcSubIdx is set.
610   unsigned SrcReg, SrcReg2;
612   if (!TII->analyzeCompare(MI, SrcReg, SrcReg2, CmpMask, CmpValue) ||
613       Register::isPhysicalRegister(SrcReg) ||
618   if (TII->optimizeCompareInstr(MI, SrcReg, SrcReg2, CmpMask, CmpValue, MRI)) {
795   /// Get the next rewritable source (SrcReg, SrcSubReg) and
811   /// (SrcReg, SrcSubReg) = (src, srcSubIdx).
917   /// (SrcReg, SrcSubReg) = (Src2, src2SubIdx).
1029   /// (SrcReg, SrcSubReg) = (Src1, src1SubIdx).
1033   /// (SrcReg, SrcSubReg) = (Src2, src2SubIdx).
1396   Register SrcReg = MI.getOperand(1).getReg();
1397   if (!Register::isVirtualRegister(SrcReg))
1404   if (CopySrcRegs.insert(SrcReg).second) {
1406     CopyMIs.insert(std::make_pair(SrcReg, &MI));
1410   MachineInstr *PrevCopy = CopyMIs.find(SrcReg)->second;
1447   Register SrcReg = MI.getOperand(1).getReg();
1448   if (isNAPhysCopy(SrcReg) && Register::isVirtualRegister(DstReg)) {
1452     NAPhysToVirtMIs.insert({SrcReg, &MI});
1456   if (!(Register::isVirtualRegister(SrcReg) && isNAPhysCopy(DstReg)))
1470   if (PrevDstReg == SrcReg) {