Allow dynamic initialization of thread_locals.

gcc/cp/
	* decl.c: Define tls_aggregates.
	(expand_static_init): Remove sorry.  Add to tls_aggregates.
	* cp-tree.h: Declare tls_aggregates.
	* call.c (set_up_extended_ref_temp): Add to tls_aggregates.
	* decl2.c (var_needs_tls_wrapper): New.
	(var_defined_without_dynamic_init): New.
	(get_tls_init_fn, get_tls_wrapper_fn): New.
	(generate_tls_wrapper, handle_tls_init): New.
	(cp_write_global_declarations): Call handle_tls_init and
	enerate_tls_wrapper.
	* mangle.c (write_guarded_var_name): Split out from..
	(mangle_guard_variable): ...here.
	(mangle_tls_init_fn, mangle_tls_wrapper_fn): Use it.
	(decl_tls_wrapper_p): New.
	* semantics.c (finish_id_expression): Replace use of thread_local
	variable with a call to its wrapper.
libiberty/
	* cp-demangle.c (d_special_name, d_dump): Handle TH and TW.
	(d_make_comp, d_print_comp): Likewise.
include/
	* demangle.h (enum demangle_component_type): Add
	DEMANGLE_COMPONENT_TLS_INIT and DEMANGLE_COMPONENT_TLS_WRAPPER.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@192211 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 14 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/tls/thread_local-wrap3.C b/gcc/testsuite/g++.dg/tls/thread_local-wrap3.C
new file mode 100644
index 00000000000..19e6ab8d0d9
--- /dev/null
+++ b/gcc/testsuite/g++.dg/tls/thread_local-wrap3.C
@@ -0,0 +1,14 @@
+// If we can't see the definition at all, we need to assume there might be
+// an init function.
+
+// { dg-require-effective-target tls }
+// { dg-options "-std=c++11" }
+// { dg-final { scan-assembler "_ZTW1i" } }
+// { dg-final { scan-assembler "_ZTH1i" } }
+
+extern thread_local int i;
+
+int main()
+{
+  return i - 42;
+}