(decl_attribute): Allow special names (e.g, `word') for mode

attribute.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@8582 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/c-common.c b/gcc/c-common.c
index f3844e2..e420756 100644 (file)
--- a/gcc/c-common.c
+++ b/gcc/c-common.c
@@ -297,27 +297,36 @@ found_attr:;
              && TREE_CODE (TREE_VALUE (args)) == IDENTIFIER_NODE)
       {
        int i;
-       char *specified_name
-         = IDENTIFIER_POINTER (TREE_VALUE (args));
+       char *specified_name = IDENTIFIER_POINTER (TREE_VALUE (args));
+       enum machine_mode mode = VOIDmode;
+       tree typefm;
+
+       /* Give this decl a type with the specified mode.
+          First check for the special modes.  */
+       if (! strcmp (specified_name, "byte")
+           || ! strcmp (specified_name, "__byte__"))
+         mode = byte_mode;
+       else if (!strcmp (specified_name, "word")
+                || ! strcmp (specified_name, "__word__"))
+         mode = word_mode;
+       else if (! strcmp (specified_name, "pointer")
+                || !strcmp (specified_name, "__pointer__"))
+         mode = ptr_mode;
+       else
+         for (i = 0; i < NUM_MACHINE_MODES; i++)
+           if (!strcmp (specified_name, GET_MODE_NAME (i)))
+             mode = (enum machine_mode) i;
 
-       /* Give this decl a type with the specified mode.  */
-       for (i = 0; i < NUM_MACHINE_MODES; i++)
-         if (!strcmp (specified_name, GET_MODE_NAME (i)))
-           {
-             tree typefm
-               = type_for_mode (i, TREE_UNSIGNED (type));
-             if (typefm != 0)
-               {
-                 TREE_TYPE (decl) = type = typefm;
-                 DECL_SIZE (decl) = 0;
-                 layout_decl (decl, 0);
-               }
-             else
-               error ("no data type for mode `%s'", specified_name);
-             break;
-           }
-       if (i == NUM_MACHINE_MODES)
+       if (mode == VOIDmode)
          error_with_decl (decl, "unknown machine mode `%s'", specified_name);
+       else if ((typefm = type_for_mode (mode, TREE_UNSIGNED (type))) == 0)
+         error_with_decl (decl, "no data type for mode `%s'", specified_name);
+       else
+         {
+           TREE_TYPE (decl) = type = typefm;
+           DECL_SIZE (decl) = 0;
+           layout_decl (decl, 0);
+         }
       }
     else if ((!strcmp (IDENTIFIER_POINTER (name), "section")
              || !strcmp (IDENTIFIER_POINTER (name), "__section__"))