Enhance option suggestion for options expected an argument (PR driver/89861).

2019-04-01  Martin Liska  <mliska@suse.cz>

	PR driver/89861
	* opt-suggestions.c (option_proposer::build_option_suggestions):
	Add variant without any argument in order to provide better
	hints.
2019-04-01  Martin Liska  <mliska@suse.cz>

	PR driver/89861
	* gcc.dg/spellcheck-options-18.c: New test.
	* gcc.dg/spellcheck-options-19.c: New test.
	* gcc.dg/spellcheck-options-20.c: New test.
	* gcc.dg/spellcheck-options-13.c: Adjust expected output.
	* gcc.dg/completion-2.c: Add one variant with no argument.

From-SVN: r270053

gcc/ChangeLog

+2019-04-01  Martin Liska  <mliska@suse.cz>
+
+	PR driver/89861
+	* opt-suggestions.c (option_proposer::build_option_suggestions):
+	Add variant without any argument in order to provide better
+	hints.
+
 2019-04-01  Richard Biener  <rguenther@suse.de>
 
 	PR c/71598

gcc/opt-suggestions.c

@@ -134,6 +134,10 @@ option_proposer::build_option_suggestions (const char *prefix)
 					      with_arg);
 		  free (with_arg);
 		}
+
+	      /* Add also variant without an option argument.  */
+	      add_misspelling_candidates (m_option_suggestions, option,
+					  opt_text);
 	    }
 	  else
 	    {
@@ -172,6 +176,10 @@ option_proposer::build_option_suggestions (const char *prefix)
 	       "-fsanitize=address"
 	     rather than to "-Wframe-address" (PR driver/69265).  */
 	  {
+	    /* Add also variant without an option argument.  */
+	    add_misspelling_candidates (m_option_suggestions, option,
+					opt_text);
+
 	    for (int j = 0; sanitizer_opts[j].name != NULL; ++j)
 	      {
 		struct cl_option optb;

gcc/testsuite/ChangeLog

+2019-04-01  Martin Liska  <mliska@suse.cz>
+
+	PR driver/89861
+	* gcc.dg/spellcheck-options-18.c: New test.
+	* gcc.dg/spellcheck-options-19.c: New test.
+	* gcc.dg/spellcheck-options-20.c: New test.
+	* gcc.dg/spellcheck-options-13.c: Adjust expected output.
+	* gcc.dg/completion-2.c: Add one variant with no argument.
+
 2019-04-01  Richard Biener  <rguenther@suse.de>
 
 	PR c/71598

gcc/testsuite/gcc.dg/completion-2.c

@@ -7,4 +7,5 @@
 -flto-partition=max
 -flto-partition=none
 -flto-partition=one
+-flto-partition=
    { dg-end-multiline-output "" } */

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

@@ -2,4 +2,4 @@
 
 /* { dg-do compile } */
 /* { dg-options "-fsanitize" } */
-/* { dg-error "unrecognized command line option .-fsanitize..$" "" { target *-*-* } 0 } */
+/* { dg-error "unrecognized command line option '-fsanitize'; did you mean '-fsanitize='?"  "" { target *-*-* } 0 } */

gcc/testsuite/gcc.dg/spellcheck-options-18.c

+/* { dg-do compile } */
+/* { dg-options "-fprofile-update" } */
+/* { dg-error "unrecognized command line option '-fprofile-update'; did you mean '-fprofile-update='?"  "" { target *-*-* } 0 } */

gcc/testsuite/gcc.dg/spellcheck-options-19.c

+/* { dg-do compile } */
+/* { dg-options "-fno-sanitize" } */
+/* { dg-error "unrecognized command line option '-fno-sanitize'; did you mean '-fno-sanitize='?"  "" { target *-*-* } 0 } */

gcc/testsuite/gcc.dg/spellcheck-options-20.c

+/* { dg-do compile } */
+/* { dg-options "-Walloc-size-larger-than" } */
+/* { dg-error "unrecognized command line option '-Walloc-size-larger-than'; did you mean '-Walloc-size-larger-than='?"  "" { target *-*-* } 0 } */