Instrument only selected files (PR gcov-profile/87442).

Instrument only selected files (PR gcov-profile/87442).

2018-11-12  Martin Liska  <mliska@suse.cz>

	PR gcov-profile/87442
	* common.opt: Add -fprofile-filter-files and -fprofile-exclude-files
	options.
	* doc/invoke.texi: Document them.
	* tree-profile.c (parse_profile_filter): New.
	(parse_profile_file_filtering): Likewise.
	(release_profile_file_filtering): Likewise.
	(include_source_file_for_profile): Likewise.
	(tree_profiling): Filter source files based on the
	newly added options.
2018-11-12  Martin Liska  <mliska@suse.cz>

	PR gcov-profile/87442
	* gcc.dg/profile-filtering-1.c: New test.
	* gcc.dg/profile-filtering-2.c: New test.

From-SVN: r266037