perform cheap test first

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@112346 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index c699623882f867896f9464d1c3b8d7f995934ecd..d0c2b8214a9c82ed5ac3d9c03125c01ef4bf2a78 100644 (file)
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -7712,7 +7712,7 @@ void Sema::MarkDeclarationReferenced(SourceLocation Loc, Decl *D) {
     } else // Walk redefinitions, as some of them may be instantiable.
       for (FunctionDecl::redecl_iterator i(Function->redecls_begin()),
            e(Function->redecls_end()); i != e; ++i) {
-        if (i->isImplicitlyInstantiable())
+        if (!i->isUsed(false) && i->isImplicitlyInstantiable())
           MarkDeclarationReferenced(Loc, *i);
       }