Re-land r124768, with a fix for PR9130.

We now emit everything except unused implicit virtual member functions when building the vtable.

llvm-svn: 124935

1 files changed, 0 insertions, 7 deletions

diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index 5fbc0f6f26f..49be40c5e40 100644
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -7220,13 +7220,6 @@ bool Sema::DefineUsedVTables() {
       switch (KeyFunction->getTemplateSpecializationKind()) {
       case TSK_Undeclared:
       case TSK_ExplicitSpecialization:
-        // The key function is in another translation unit. Mark all of the
-        // virtual members of this class as referenced so that we can build a
-        // vtable anyway (in order to do devirtualization when optimizations
-        // are turned on for example.
-        MarkVirtualMembersReferenced(Loc, Class);
-        continue;
-
       case TSK_ExplicitInstantiationDeclaration:
         // The key function is in another translation unit.
         continue;