parent
2f736c9577
commit
680b74941f
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@ -487,7 +487,7 @@ unsigned RAFast::reloadVirtReg(MachineBasicBlock &MBB, MachineInstr *MI,
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}
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/// reservePhysReg - Mark PhysReg as reserved. This is very similar to
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/// defineVirtReg except the physreg is reverved instead of allocated.
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/// defineVirtReg except the physreg is reserved instead of allocated.
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void RAFast::reservePhysReg(MachineBasicBlock &MBB, MachineInstr *MI,
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unsigned PhysReg) {
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UsedInInstr.set(PhysReg);
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@ -623,6 +623,16 @@ void RAFast::AllocateBasicBlock(MachineBasicBlock &MBB) {
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if (!Reg || !TargetRegisterInfo::isPhysicalRegister(Reg) ||
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ReservedRegs.test(Reg)) continue;
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if (MO.isUse()) {
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#ifndef NDEBUG
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// We are using a physreg directly. It had better not be clobbered by a
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// virtreg.
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assert(PhysRegState[Reg] <= regReserved && "Using clobbered physreg");
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if (PhysRegState[Reg] == regDisabled)
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for (const unsigned *AS = TRI->getAliasSet(Reg);
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unsigned Alias = *AS; ++AS)
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assert(PhysRegState[Alias] <= regReserved &&
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"Physreg alias was clobbered");
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#endif
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PhysKills.push_back(Reg); // Any clean physreg use is a kill.
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UsedInInstr.set(Reg);
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} else if (MO.isEarlyClobber()) {
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