From d814e32e57c52f554caa125bac2be1e90a083947 Mon Sep 17 00:00:00 2001 From: Dan Gohman Date: Fri, 30 Oct 2009 23:57:47 +0000 Subject: Don't mark registers dead here when processing nodes with MVT::Flag results. This works around a problem affecting targets which rely on MVT::Flag to handle physical register defs. llvm-svn: 85638 --- llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'llvm/lib') diff --git a/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp b/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp index e727bc9f33b..da311eddcae 100644 --- a/llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp +++ b/llvm/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); } } -- cgit v1.2.3