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| author | Evan Cheng <evan.cheng@apple.com> | 2007-08-02 05:29:38 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2007-08-02 05:29:38 +0000 |
| commit | 358c3d1dac31258ba8af1e53646e17bfb4880ddb (patch) | |
| tree | c20606b20d1adf4e4c3f9cd85e0a87c42e5adfcf /llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp | |
| parent | 824693c87a4244fed86c1aa8f26e905933e77739 (diff) | |
| download | bcm5719-llvm-358c3d1dac31258ba8af1e53646e17bfb4880ddb.tar.gz bcm5719-llvm-358c3d1dac31258ba8af1e53646e17bfb4880ddb.zip | |
Do not emit copies for physical register output if it's not used.
llvm-svn: 40722
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp index 3738702dc8d..192b0767e36 100644 --- a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp @@ -676,7 +676,8 @@ void ScheduleDAG::EmitNode(SDNode *Node, if (HasPhysRegOuts) { for (unsigned i = II.numDefs; i < NumResults; ++i) { unsigned Reg = II.ImplicitDefs[i - II.numDefs]; - EmitCopyFromReg(Node, i, Reg, VRBaseMap); + if (Node->hasAnyUseOfValue(i)) + EmitCopyFromReg(Node, i, Reg, VRBaseMap); } } } else { |
