diff options
| -rw-r--r-- | lib/CodeGen/SelectionDAG/InstrEmitter.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/InstrEmitter.cpp b/lib/CodeGen/SelectionDAG/InstrEmitter.cpp index e727bc9f33..da311eddca 100644 --- a/lib/CodeGen/SelectionDAG/InstrEmitter.cpp +++ b/lib/CodeGen/SelectionDAG/InstrEmitter.cpp @@ -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); } } |