[PATCH] Improve optimize pragma/attribute diagnostics

[Richard Biener]

As pointed out by Manu in BZ.

Bootstrapped and tested on x86_64-unknown-linux-gnu, applied as obvious.

Richard.

2016-06-08  Richard Biener  <rguent...@suse.de>

        * c-common.c (parse_optimize_options): Improve diagnostic messages.

Index: gcc/c-family/c-common.c
===================================================================
--- gcc/c-family/c-common.c     (revision 237174)
+++ gcc/c-family/c-common.c     (working copy)
@@ -9542,10 +9542,10 @@ parse_optimize_options (tree args, bool
                  ret = false;
                  if (attr_p)
                    warning (OPT_Wattributes,
-                            "bad option %s to optimize attribute", p);
+                            "bad option %qs to attribute %<optimize%>", p);
                  else
                    warning (OPT_Wpragmas,
-                            "bad option %s to pragma attribute", p);
+                            "bad option %qs to pragma %<optimize%>", p);
                  continue;
                }
 
@@ -9589,11 +9589,11 @@ parse_optimize_options (tree args, bool
          ret = false;
          if (attr_p)
            warning (OPT_Wattributes,
-                    "bad option %s to optimize attribute",
+                    "bad option %qs to attribute %<optimize%>",
                     decoded_options[i].orig_option_with_args_text);
          else
            warning (OPT_Wpragmas,
-                    "bad option %s to pragma attribute",
+                    "bad option %qs to pragma %<optimize%>",
                     decoded_options[i].orig_option_with_args_text);
          continue;
        }