Use the Itanium ABI for thread_local on Darwin.
After some discussion, it was decided to use the Itanium ABI for thread_local on
Darwin OS X platforms. This involved a couple of changes. First, we use
"_tlv_atexit" instead of "__cxa_thread_atexit". Secondly, the global variables
are marked with 'internal' linkage, because we want all access to be calls to
the Itanium-specific entry point, which has normal linkage.
<rdar://problem/13733006>
llvm-svn: 180941
diff --git a/clang/test/CodeGenCXX/tls-init-funcs.cpp b/clang/test/CodeGenCXX/tls-init-funcs.cpp
new file mode 100644
index 0000000..17299dc
--- /dev/null
+++ b/clang/test/CodeGenCXX/tls-init-funcs.cpp
@@ -0,0 +1,10 @@
+// RUN: %clang_cc1 -triple x86_64-apple-macosx10.8 -std=c++11 -S -emit-llvm %s -o - | FileCheck %s
+
+// CHECK: @a = internal thread_local global
+// CHECK: @_tlv_atexit({{.*}}@_ZN1AD1Ev
+
+struct A {
+ ~A();
+};
+
+thread_local A a;