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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 | 33d5595d667ba4a880bd7fe785724e8197bef70c (patch) | |
| tree | d40ca1076c4bf7fcfeedd9b7f656c70b582b5c0e /lib/CodeGen/SelectionDAG/ScheduleDAG.cpp | |
| parent | 0a2a515c5bb075294dd261b0ad236b6d19c66f8c (diff) | |
Do not emit copies for physical register output if it's not used.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40722 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/ScheduleDAG.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/ScheduleDAG.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp b/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp index 3738702dc8..192b0767e3 100644 --- a/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp +++ b/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 { |