text: // RUN: rm -rf %t
  
  // First, build two modules that both re-export the same header.
  // RUN: %clang_cc1 -x c++ -std=c++11 -fmodules -fimplicit-module-maps -fmodule-name=b -o %t/b.pcm \
  // RUN:     -emit-module %S/Inputs/merge-vtable-codegen/merge-vtable-codegen.modulemap \
  // RUN:     -I %S/Inputs/merge-vtable-codegen
  // RUN: %clang_cc1 -x c++ -std=c++11 -fmodules -fimplicit-module-maps -fmodule-name=c -o %t/c.pcm \
  // RUN:     -emit-module %S/Inputs/merge-vtable-codegen/merge-vtable-codegen.modulemap \
  // RUN:     -I %S/Inputs/merge-vtable-codegen
  
  // Use the two modules in a single compile.
  // RUN: %clang_cc1 -x c++ -std=c++11 -fmodules -fimplicit-module-maps -fmodule-file=%t/b.pcm -fmodule-file=%t/c.pcm \
  // RUN:     -fmodule-map-file=%S/Inputs/merge-vtable-codegen/merge-vtable-codegen.modulemap \
  // RUN:     -emit-llvm -o %t/test.o %s
  
  // Note that order is important:
  // Module 'c' just reexports A, while module 'b' defines a method that uses a
  // virtual method of A.
  #include "Inputs/merge-vtable-codegen/c.h"
  #include "Inputs/merge-vtable-codegen/b.h"
  
  void t() {
    b(nullptr);
  }
  