Index: cp/semantics.c
===================================================================
--- cp/semantics.c	(revision 180185)
+++ cp/semantics.c	(working copy)
@@ -8341,7 +8341,7 @@ potential_constant_expression_1 (tree t, bool want
       return false;
 
     default:
-      sorry ("unexpected ast of kind %s", tree_code_name[TREE_CODE (t)]);
+      sorry ("unexpected AST of kind %s", tree_code_name[TREE_CODE (t)]);
       gcc_unreachable();
       return false;
     }
Index: plugin.c
===================================================================
--- plugin.c	(revision 180181)
+++ plugin.c	(working copy)
@@ -1,5 +1,5 @@
 /* Support for GCC plugin mechanism.
-   Copyright (C) 2009, 2010 Free Software Foundation, Inc.
+   Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -149,7 +149,7 @@ add_new_plugin (const char* plugin_name)
 			    plugin_name, ".so", NULL);
       if (access (plugin_name, R_OK))
 	fatal_error
-	  ("inacessible plugin file %s expanded from short plugin name %s: %m",
+	  ("inaccessible plugin file %s expanded from short plugin name %s: %m",
 	   plugin_name, base_name);
     }
   else
Index: config/rx/rx.c
===================================================================
--- config/rx/rx.c	(revision 180181)
+++ config/rx/rx.c	(working copy)
@@ -637,7 +637,7 @@ rx_print_operand (FILE * file, rtx op, int letter)
 	case 0xb: fprintf (file, "fintv"); break;
 	case 0xc: fprintf (file, "intb"); break;
 	default:
-	  warning (0, "unreocgnized control register number: %d - using 'psw'",
+	  warning (0, "unrecognized control register number: %d - using 'psw'",
 		   (int) INTVAL (op));
 	  fprintf (file, "psw");
 	  break;