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

1 files changed, 4 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h
index ce7dda4028..3502e89501 100644
--- a/include/llvm/CodeGen/SelectionDAGNodes.h
+++ b/include/llvm/CodeGen/SelectionDAGNodes.h
@@ -858,6 +858,10 @@ public:
   /// operation.
   bool hasNUsesOfValue(unsigned NUses, unsigned Value) const;
 
+  /// hasAnyUseOfValue - Return true if there are any use of the indicated
+  /// value. This method ignores uses of other values defined by this operation.
+  bool hasAnyUseOfValue(unsigned Value) const;
+
   /// isOnlyUse - Return true if this node is the only use of N.
   ///
   bool isOnlyUse(SDNode *N) const;