* sanitizer.def (BUILT_IN_ASAN_BEFORE_DYNAMIC_INIT,
	BUILT_IN_ASAN_AFTER_DYNAMIC_INIT): New.
	* asan.c (instrument_derefs): Handle also VAR_DECL loads/stores.
	Don't instrument accesses to VAR_DECLs which are known to fit
	into their bounds and the vars are known to have shadow bytes
	indicating allowed access.
	(asan_dynamic_init_call): New function.
	(asan_add_global): If vnode->dynamically_initialized,
	set __has_dynamic_init to 1 instead of 0.
	(initialize_sanitizer_builtins): Add BT_FN_VOID_CONST_PTR var.
	* asan.h (asan_dynamic_init_call): New prototype.
	* cgraph.h (varpool_node): Add dynamically_initialized bitfield.
cp/
	* decl2.c: Include asan.h.
	(one_static_initialization_or_destruction): If -fsanitize=address,
	init is non-NULL and guard is NULL, set
	vnode->dynamically_initialized.
	(do_static_initialization_or_destruction): Call
	__asan_{before,after}_dynamic_init around the static initialization.
testsuite/
	* c-c++-common/asan/no-redundant-instrumentation-1.c: Tweak to avoid
	optimizing away some __asan_report* calls.

From-SVN: r205282