If a method is virtual and the class key function is in another file, emit the method as available_externally.

Fixes PR6747


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101757 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/CodeGen/CGVTables.h b/lib/CodeGen/CGVTables.h
index b4262fe224..bc113ec42f 100644
--- a/lib/CodeGen/CGVTables.h
+++ b/lib/CodeGen/CGVTables.h
@@ -295,6 +295,15 @@ public:
   CodeGenVTables(CodeGenModule &CGM)
     : CGM(CGM) { }
 
+  // isKeyFunctionInAnotherTU - True if this record has a key function and it is
+  // in another translation unit.
+  static bool isKeyFunctionInAnotherTU(ASTContext &Context,
+				       const CXXRecordDecl *RD) {
+    assert (RD->isDynamicClass() && "Non dynamic classes have no key.");
+    const CXXMethodDecl *KeyFunction = Context.getKeyFunction(RD);
+    return KeyFunction && !KeyFunction->getBody();
+  }
+
   /// needsVTTParameter - Return whether the given global decl needs a VTT
   /// parameter, which it does if it's a base constructor or destructor with
   /// virtual bases.