Reland (2x) r230314, "Fix codegen for virtual methods that are (re-) exported from multiple modules."

This reverts commits r230477 and r230478.

llvm-svn: 230526

1 files changed, 17 insertions, 0 deletions

diff --git a/clang/test/Modules/Inputs/merge-vtable-codegen/b.h b/clang/test/Modules/Inputs/merge-vtable-codegen/b.h
new file mode 100644
index 00000000000..770e46077f9
--- /dev/null
+++ b/clang/test/Modules/Inputs/merge-vtable-codegen/b.h
@@ -0,0 +1,17 @@
+#ifndef B_H
+#define B_H
+
+#include "a.h"
+
+class B : virtual public A {
+  virtual void x() {}
+};
+
+void b(A* p) {
+  p->x();
+  // Instantiating a class that virtually inherits 'A'
+  // triggers calculation of the vtable offsets in 'A'.
+  B b;
+}
+
+#endif