Do UBSAN sanitization just when current_function_decl != NULL_TREE (PR sanitize/81530).

Do UBSAN sanitization just when current_function_decl != NULL_TREE (PR sanitize/81530).

2017-07-31  Martin Liska  <mliska@suse.cz>

	PR sanitize/81530
	* cp-gimplify.c (cp_genericize): Guard condition with flag_sanitize_p
	also with current_function_decl non-null equality.
	* cp-ubsan.c (cp_ubsan_instrument_vptr_p): Likewise.
	* decl.c (compute_array_index_type): Likewise.
	* init.c (finish_length_check): Likewise.
	* typeck.c (cp_build_binary_op): Likewise.
2017-07-31  Martin Liska  <mliska@suse.cz>

	PR sanitize/81530
	* c-convert.c (convert): Guard condition with flag_sanitize_p
	also with current_function_decl non-null equality.
	* c-decl.c (grokdeclarator): Likewise.
	* c-typeck.c (build_binary_op): Likewise.
2017-07-31  Martin Liska  <mliska@suse.cz>

	PR sanitize/81530
	* convert.c (convert_to_integer_1): Guard condition with flag_sanitize_p
	also with current_function_decl non-null equality.
2017-07-31  Martin Liska  <mliska@suse.cz>

	PR sanitize/81530
	* c-ubsan.c (ubsan_maybe_instrument_array_ref):
	Guard condition with flag_sanitize_p also with current_function_decl
	non-null equality.
	(ubsan_maybe_instrument_reference_or_call): Likewise.
2017-07-31  Martin Liska  <mliska@suse.cz>

	PR sanitize/81530
	* g++.dg/ubsan/pr81530.C: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@250730 138bc75d-0d04-0410-961f-82ee72b054a4