Implement Itanium name mangling support for C++ Modules TS.

This follows the scheme agreed with Nathan Sidwell, which can be found here:

  https://gcc.gnu.org/wiki/cxx-modules?action=AttachFile

This will be proposed to the itanium-cxx-abi list once we have some experience
with how well it works; the ABI for this TS should be considered unstable until
it is part of the Itanium C++ ABI.

llvm-svn: 312467

1 files changed, 7 insertions, 9 deletions

diff --git a/clang/test/CXX/modules-ts/codegen-basics.cppm b/clang/test/CXX/modules-ts/codegen-basics.cppm
index d1552d9edd2..a85e12df26f 100644
--- a/clang/test/CXX/modules-ts/codegen-basics.cppm
+++ b/clang/test/CXX/modules-ts/codegen-basics.cppm
@@ -4,20 +4,18 @@
 export module FooBar;
 
 export {
-  // CHECK-LABEL: define i32 @_Z1fv(
+  // CHECK-DAG: define i32 @_Z1fv(
   int f() { return 0; }
 }
 
-// CHECK-LABEL: define weak_odr void @_Z2f2v(
+// CHECK-DAG: define weak_odr void @_ZW6FooBarE2f2v(
 inline void f2() { }
 
-// FIXME: Emit global variables and their initializers with this TU.
-// Emit an initialization function that other TUs can call, with guard variable.
-
-// FIXME: Mangle non-exported symbols so they don't collide with
-// non-exported symbols from other modules?
+// CHECK-DAG: define void @_ZW6FooBarE2f3v(
+static void f3() {}
+export void use_f3() { f3(); }
 
-// FIXME: Formally-internal-linkage symbols that are used from an exported
-// symbol need a mangled name and external linkage.
+// FIXME: Emit global variables and their initializers with this TU.
+// Emit an initialization function that other TUs can call, with guard variable?
 
 // FIXME: const-qualified variables don't have implicit internal linkage when owned by a module.