1 //===--- LivePhysRegs.cpp - Live Physical Register Set --------------------===//
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
13 //===----------------------------------------------------------------------===//
21 #include "llvm/Config/llvm-config.h"
28 /// mask.
37         Clobbers->push_back(std::make_pair(*LRI, &MO));  in removeRegsInMask()
77 /// killed-uses, add defs. This is the not recommended way, because it depends
84     if (O->isReg()) {  in stepForward()
85       if (O->isDebug())  in stepForward()
87       Register Reg = O->getReg();  in stepForward()
90       if (O->isDef()) {  in stepForward()
95         assert(O->isUse());  in stepForward()
96         if (O->isKill())  in stepForward()
99     } else if (O->isRegMask()) {  in stepForward()
108     if (Reg.second->isReg() && Reg.second->isDead())  in stepForward()
110     if (Reg.second->isRegMask() &&  in stepForward()
111         MachineOperand::clobbersPhysReg(Reg.second->getRegMask(), Reg.first))  in stepForward()
154 /// Add live-in registers of basic block \p MBB to \p LiveRegs.
158     LaneBitmask Mask = LI.LaneMask;  in addBlockLiveIns()  local
160     assert(Mask.any() && "Invalid livein mask");  in addBlockLiveIns()
161     if (Mask.all() || !S.isValid()) {  in addBlockLiveIns()
167       if ((Mask & TRI->getSubRegIndexLaneMask(SI)).any())  in addBlockLiveIns()
177   for (const MCPhysReg *CSR = MRI.getCalleeSavedRegs(); CSR && *CSR; ++CSR)  in addCalleeSavedRegs()  local
178     LiveRegs.addReg(*CSR);  in addCalleeSavedRegs()
196   /// If a callee-saved register that is not pristine is already present  in addPristines()
210   // To get the live-outs we simply merge the live-ins of all successors.  in addLiveOutsNoPristines()
216     // use for callee-saved registers. So we add all callee saved registers  in addLiveOutsNoPristines()
260   assert(MBB.livein_empty() && "Expected empty live-in list");  in addLiveIns()
290       if (!MO->isReg() || !MO->isDef() || MO->isDebug())  in recomputeLivenessFlags()
293       Register Reg = MO->getReg();  in recomputeLivenessFlags()
300       // Special-case return instructions for cases when a return is not  in recomputeLivenessFlags()
311       MO->setIsDead(IsNotLive);  in recomputeLivenessFlags()
319       if (!MO->isReg() || !MO->readsReg() || MO->isDebug())  in recomputeLivenessFlags()
322       Register Reg = MO->getReg();  in recomputeLivenessFlags()
328       MO->setIsKill(IsNotLive);  in recomputeLivenessFlags()