1 files changed, 74 insertions, 0 deletions
diff --git a/clang/test/Modules/odr_hash.mm b/clang/test/Modules/odr_hash.mm
new file mode 100644
index 00000000000..724ed95dc1c
--- /dev/null
+++ b/clang/test/Modules/odr_hash.mm
@@ -0,0 +1,74 @@
+// Clear and create directories
+// RUN: rm -rf %t
+// RUN: mkdir %t
+// RUN: mkdir %t/cache
+// RUN: mkdir %t/Inputs
+
+// Build first header file
+// RUN: echo "#define FIRST" >> %t/Inputs/first.h
+// RUN: cat %s               >> %t/Inputs/first.h
+
+// Build second header file
+// RUN: echo "#define SECOND" >> %t/Inputs/second.h
+// RUN: cat %s                >> %t/Inputs/second.h
+
+// Test that each header can compile
+// RUN: %clang_cc1 -fsyntax-only -x objective-c++ %t/Inputs/first.h -fblocks -fobjc-arc
+// RUN: %clang_cc1 -fsyntax-only -x objective-c++ %t/Inputs/second.h -fblocks -fobjc-arc
+
+// Build module map file
+// RUN: echo "module FirstModule {"     >> %t/Inputs/module.map
+// RUN: echo "    header \"first.h\""   >> %t/Inputs/module.map
+// RUN: echo "}"                        >> %t/Inputs/module.map
+// RUN: echo "module SecondModule {"    >> %t/Inputs/module.map
+// RUN: echo "    header \"second.h\""  >> %t/Inputs/module.map
+// RUN: echo "}"                        >> %t/Inputs/module.map
+
+// Run test
+// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t/cache -x objective-c++ -I%t/Inputs -verify %s -fblocks -fobjc-arc
+
+#if !defined(FIRST) && !defined(SECOND)
+#include "first.h"
+#include "second.h"
+#endif
+
+#if defined(FIRST) || defined(SECOND)
+@protocol P1
+@end
+
+@interface I1
+@end
+
+@interface Interface1 <T : I1 *> {
+@public
+  T<P1> x;
+}
+@end
+#endif
+
+#if defined(FIRST)
+struct S {
+  Interface1 *I;
+  decltype(I->x) x;
+  int y;
+};
+#elif defined(SECOND)
+struct S {
+  Interface1 *I;
+  decltype(I->x) x;
+  bool y;
+};
+#else
+S s;
+// expected-error@second.h:* {{'S::y' from module 'SecondModule' is not present in definition of 'S' in module 'FirstModule'}}
+// expected-note@first.h:* {{declaration of 'y' does not match}}
+#endif
+
+// Keep macros contained to one file.
+#ifdef FIRST
+#undef FIRST
+#endif
+
+#ifdef SECOND
+#undef SECOND
+#endif