re PR other/17900 (GCC's source path in ICE is wrong)

	PR other/17900
	* diagnostic.c (trim_filename): Fix logic bug in walking backwards
	up the filename looking for a previous directory separator.

From-SVN: r89029

gcc/ChangeLog

+2004-10-14  Ben Elliston  <bje@au.ibm.com>
+
+	PR other/17900
+	* diagnostic.c (trim_filename): Fix logic bug in walking backwards
+	up the filename looking for a previous directory separator.
+
 2004-10-14  Joseph S. Myers  <jsm@polyomino.org.uk>
 
 	* c-tree.h (enum c_typespec_kind, struct c_typespec,

gcc/diagnostic.c

@@ -366,7 +366,7 @@ trim_filename (const char *name)
     p++, q++;
 
   /* Now go backwards until the previous directory separator.  */
-  while (p > name && IS_DIR_SEPARATOR (p[-1]))
+  while (p > name && !IS_DIR_SEPARATOR (p[-1]))
     p--;
 
   return p;