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Fix a future TwoAddressInstructionPass crash.

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No test case, the crash only happens when the default use list order is
changed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161627 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2012-08-09 22:08:26 +00:00
parent 69a0aa87f8
commit 988069e229
1 changed files with 2 additions and 1 deletions
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3
lib/CodeGen/TwoAddressInstructionPass.cpp
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@ -235,7 +235,7 @@ bool TwoAddressInstructionPass::Sink3AddrInstruction(MachineBasicBlock *MBB,
// appropriate location, we can try to sink the current instruction
// past it.
if (!KillMI || KillMI->getParent() != MBB || KillMI == MI ||
KillMI->isTerminator())
KillMI == OldPos || KillMI->isTerminator())
return false;
// If any of the definitions are used by another instruction between the
@ -278,6 +278,7 @@ bool TwoAddressInstructionPass::Sink3AddrInstruction(MachineBasicBlock *MBB,
}
}
}
assert(KillMO && "Didn't find kill");
// Update kill and LV information.
KillMO->setIsKill(false);