+ j++;
+ }
+ return true;
+ }
+
+ bool canClauseLocalKillFitInClause(
+ unsigned AluInstCount,
+ std::vector<std::pair<unsigned, unsigned> > KCacheBanks,
+ MachineBasicBlock::iterator Def,
+ MachineBasicBlock::iterator BBEnd) {
+ const R600RegisterInfo &TRI = TII->getRegisterInfo();
+ for (MachineInstr::const_mop_iterator
+ MOI = Def->operands_begin(),
+ MOE = Def->operands_end(); MOI != MOE; ++MOI) {
+ if (!MOI->isReg() || !MOI->isDef() ||
+ TRI.isPhysRegLiveAcrossClauses(MOI->getReg()))
+ continue;
+
+ // Def defines a clause local register, so check that its use will fit
+ // in the clause.
+ unsigned LastUseCount = 0;
+ for (MachineBasicBlock::iterator UseI = Def; UseI != BBEnd; ++UseI) {
+ AluInstCount += OccupiedDwords(UseI);
+ // Make sure we won't need to end the clause due to KCache limitations.
+ if (!SubstituteKCacheBank(UseI, KCacheBanks, false))
+ return false;
+
+ // We have reached the maximum instruction limit before finding the
+ // use that kills this register, so we cannot use this def in the
+ // current clause.
+ if (AluInstCount >= TII->getMaxAlusPerClause())
+ return false;
+
+ // Register kill flags have been cleared by the time we get to this
+ // pass, but it is safe to assume that all uses of this register
+ // occur in the same basic block as its definition, because
+ // it is illegal for the scheduler to schedule them in
+ // different blocks.
+ if (UseI->findRegisterUseOperandIdx(MOI->getReg()))
+ LastUseCount = AluInstCount;
+
+ if (UseI != Def && UseI->findRegisterDefOperandIdx(MOI->getReg()) != -1)
+ break;
+ }
+ if (LastUseCount)
+ return LastUseCount <= TII->getMaxAlusPerClause();
+ llvm_unreachable("Clause local register live at end of clause.");