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Don't mark registers dead here when processing nodes with MVT::Flag

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results. This works around a problem affecting targets which rely on
MVT::Flag to handle physical register defs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85638 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-10-30 23:57:47 +00:00
parent 0437a06ea6
commit 4cddfd9b6f
1 changed files with 5 additions and 1 deletions
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6
lib/CodeGen/SelectionDAG/InstrEmitter.cpp
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@ -573,7 +573,11 @@ void InstrEmitter::EmitNode(SDNode *Node, bool IsClone, bool IsCloned,
unsigned Reg = II.getImplicitDefs()[i - II.getNumDefs()];
if (Node->hasAnyUseOfValue(i))
EmitCopyFromReg(Node, i, IsClone, IsCloned, Reg, VRBaseMap);
else
// If there are no uses, mark the register as dead now, so that
// MachineLICM/Sink can see that it's dead. Don't do this if the
// node has a Flag value, for the benefit of targets still using
// Flag for values in physregs.
else if (Node->getValueType(Node->getNumValues()-1) != MVT::Flag)
MI->addRegisterDead(Reg, TRI);
}
}