Add "native" as a valid option value for -march= on i386 (PR driver/83193).

2018-02-22  Martin Liska  <mliska@suse.cz>

	PR driver/83193
	* config/i386/i386.c (ix86_option_override_internal):
	Add "native" as a possible value for -march and -mtune.

From-SVN: r257893

gcc/ChangeLog

+2018-02-22  Martin Liska  <mliska@suse.cz>
+
+	PR driver/83193
+	* config/i386/i386.c (ix86_option_override_internal):
+	Add "native" as a possible value for -march and -mtune.
+
 2018-02-22  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/84502

gcc/config/i386/i386.c

@@ -4193,6 +4193,11 @@ ix86_option_override_internal (bool main_args_p,
 		|| ((processor_alias_table[i].flags & PTA_64BIT) != 0)))
 	  candidates.safe_push (processor_alias_table[i].name);
 
+#ifdef HAVE_LOCAL_CPU_DETECT
+      /* Add also "native" as possible value.  */
+      candidates.safe_push ("native");
+#endif
+
       char *s;
       const char *hint
 	= candidates_list_and_hint (opts->x_ix86_arch_string, s, candidates);
@@ -4265,6 +4270,11 @@ ix86_option_override_internal (bool main_args_p,
 	    || ((processor_alias_table[i].flags & PTA_64BIT) != 0))
 	  candidates.safe_push (processor_alias_table[i].name);
 
+#ifdef HAVE_LOCAL_CPU_DETECT
+      /* Add also "native" as possible value.  */
+      candidates.safe_push ("native");
+#endif
+
       char *s;
       const char *hint
 	= candidates_list_and_hint (opts->x_ix86_tune_string, s, candidates);