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TargetInstrInfo::commuteInstruction() doesn't actually return a new instruction

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unless it was requested to with an optional parameter that defaults to false, so
we don't need to handle that case in TwoAddressInstructionPass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175974 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Cameron Zwarich 2013-02-23 23:13:28 +00:00
parent abafaba4d5
commit 1ea93c79bc
1 changed files with 3 additions and 13 deletions
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16
lib/CodeGen/TwoAddressInstructionPass.cpp
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@ -581,19 +581,9 @@ commuteInstruction(MachineBasicBlock::iterator &mi,
} }
DEBUG(dbgs() << "2addr: COMMUTED TO: " << *NewMI); DEBUG(dbgs() << "2addr: COMMUTED TO: " << *NewMI);
// If the instruction changed to commute it, update livevar. assert(NewMI == MI &&
if (NewMI != MI) { "TargetInstrInfo::commuteInstruction() should not return a new "
if (LV) "instruction unless it was requested.");
// Update live variables
LV->replaceKillInstruction(RegC, MI, NewMI);
if (LIS)
LIS->ReplaceMachineInstrInMaps(MI, NewMI);
MBB->insert(mi, NewMI); // Insert the new inst
MBB->erase(mi); // Nuke the old inst.
mi = NewMI;
DistanceMap.insert(std::make_pair(NewMI, Dist));
}
// Update source register map. // Update source register map.
unsigned FromRegC = getMappedReg(RegC, SrcRegMap); unsigned FromRegC = getMappedReg(RegC, SrcRegMap);