lib/CodeGen/ExecutionDepsFix.cpp

183   void setLiveReg(int rx, DomainValue *DV);
184   void kill(int rx);
185   void force(int rx, unsigned domain);
258 /// Set LiveRegs[rx] = dv, updating reference counts.
259 void ExeDepsFix::setLiveReg(int rx, DomainValue *dv) {
260   assert(unsigned(rx) < NumRegs && "Invalid index");
263   if (LiveRegs[rx].Value == dv)
265   if (LiveRegs[rx].Value)
266     release(LiveRegs[rx].Value);
267   LiveRegs[rx].Value = retain(dv);
270 // Kill register rx, recycle or collapse any DomainValue.
271 void ExeDepsFix::kill(int rx) {
272   assert(unsigned(rx) < NumRegs && "Invalid index");
274   if (!LiveRegs[rx].Value)
277   release(LiveRegs[rx].Value);
278   LiveRegs[rx].Value = 0;
281 /// Force register rx into domain.
282 void ExeDepsFix::force(int rx, unsigned domain) {
283   assert(unsigned(rx) < NumRegs && "Invalid index");
285   if (DomainValue *dv = LiveRegs[rx].Value) {
294       assert(LiveRegs[rx].Value && "Not live after collapse?");
295       LiveRegs[rx].Value->addDomain(domain);
299     setLiveReg(rx, alloc(domain));
315     for (unsigned rx = 0; rx != NumRegs; ++rx)
316       if (LiveRegs[rx].Value == dv)
317         setLiveReg(rx, alloc(domain));
339   for (unsigned rx = 0; rx != NumRegs; ++rx)
340     if (LiveRegs[rx].Value == B)
341       setLiveReg(rx, A);
362   for (unsigned rx = 0; rx != NumRegs; ++rx) {
363     LiveRegs[rx].Value = 0;
364     LiveRegs[rx].Def = -(1 << 20);
371       int rx = regIndex(*i);
372       if (rx < 0)
377       LiveRegs[rx].Def = -1;
393     for (unsigned rx = 0; rx != NumRegs; ++rx) {
395       LiveRegs[rx].Def = std::max(LiveRegs[rx].Def, fi->second[rx].Def);
397       DomainValue *pdv = resolve(fi->second[rx].Value);
400       if (!LiveRegs[rx].Value) {
401         setLiveReg(rx, pdv);
406       if (LiveRegs[rx].Value->isCollapsed()) {
408         unsigned Domain = LiveRegs[rx].Value->getFirstDomain();
416         merge(LiveRegs[rx].Value, pdv);
418         force(rx, pdv->getFirstDomain());
468   int rx = regIndex(MI->getOperand(OpIdx).getReg());
469   if (rx < 0)
472   unsigned Clearance = CurInstr - LiveRegs[rx].Def;
515     int rx = regIndex(MO.getReg());
516     if (rx < 0)
519     // This instruction explicitly defines rx.
520     DEBUG(dbgs() << TRI->getName(RC->getRegister(rx)) << ":\t" << CurInstr
524     // Call breakDependence before setting LiveRegs[rx].Def.
529     // How many instructions since rx was last written?
530     LiveRegs[rx].Def = CurInstr;
534       kill(rx);
585     int rx = regIndex(mo.getReg());
586     if (rx < 0) continue;
587     force(rx, domain);
594     int rx = regIndex(mo.getReg());
595     if (rx < 0) continue;
596     kill(rx);
597     force(rx, domain);
614       int rx = regIndex(mo.getReg());
615       if (rx < 0) continue;
616       if (DomainValue *dv = LiveRegs[rx].Value) {
627           used.push_back(rx);
631           kill(rx);
647     int rx = *i;
648     const LiveReg &LR = LiveRegs[rx];
651       kill(rx);
706     int rx = regIndex(mo.getReg());
707     if (rx < 0) continue;
708     if (!LiveRegs[rx].Value || (mo.isDef() && LiveRegs[rx].Value != dv)) {
709       kill(rx);
710       setLiveReg(rx, dv);