Do not suggest -fsanitize=all (PR driver/78863).

	PR driver/78863
	* gcc.c (driver::build_option_suggestions): Do not add
	-fsanitize=all as a suggestion candidate.
	PR driver/78863
	* gcc.dg/spellcheck-options-13.c: New test.

From-SVN: r243857

gcc/ChangeLog

+2016-12-21  Jakub Jelinek  <jakub@redhat.com>
+	    Martin Liska  <mliska@suse.cz>
+
+	PR driver/78863
+	* gcc.c (driver::build_option_suggestions): Do not add
+	-fsanitize=all as a suggestion candidate.
+
 2016-12-21  Alexander Monakov  <amonakov@ispras.ru>
 
 	PR target/78831

gcc/gcc.c

@@ -7733,6 +7733,17 @@ driver::build_option_suggestions (void)
 	  {
 	    for (int j = 0; sanitizer_opts[j].name != NULL; ++j)
 	      {
+		struct cl_option optb;
+		/* -fsanitize=all is not valid, only -fno-sanitize=all.
+		   So don't register the positive misspelling candidates
+		   for it.  */
+		if (sanitizer_opts[j].flag == ~0U && i == OPT_fsanitize_)
+		  {
+		    optb = *option;
+		    optb.opt_text = opt_text = "-fno-sanitize=";
+		    optb.cl_reject_negative = true;
+		    option = &optb;
+		  }
 		/* Get one arg at a time e.g. "-fsanitize=address".  */
 		char *with_arg = concat (opt_text,
 					 sanitizer_opts[j].name,

gcc/testsuite/ChangeLog

+2016-12-21  Martin Liska  <mliska@suse.cz>
+
+	PR driver/78863
+	* gcc.dg/spellcheck-options-13.c: New test.
+
 2016-12-21  Alexander Monakov  <amonakov@ispras.ru>
 
 	* gcc.target/nvptx/decl-shared.c (v_common): Add 'common' attribute to

gcc/testsuite/gcc.dg/spellcheck-options-13.c

+/* PR driver/78863.  */
+
+/* { dg-do compile } */
+/* { dg-options "-fsanitize" } */
+/* { dg-error "unrecognized command line option .-fsanitize..$" "" { target *-*-* } 0 } */