c-typeck.c (build_c_cast): Only copy overflow from expr nodes.

	* c-typeck.c (build_c_cast): Only copy overflow from expr nodes.
	* tree.h (IS_NON_TYPE_CODE_CLASS): Simplify.
	(struct tree_common): Update public_flag documentation.

From-SVN: r86065

gcc/ChangeLog

+2004-08-16  Nathan Sidwell  <nathan@codesourcery.com>
+
+	* c-typeck.c (build_c_cast): Only copy overflow from expr nodes.
+	* tree.h (IS_NON_TYPE_CODE_CLASS): Simplify.
+	(struct tree_common): Update public_flag documentation.
+
 2004-08-16  Nathanael Nerode  <neroden@gcc.gnu.org>
 
 	* tree-ssa-copyrename.c (copy_rename_partition_coalesce):
@@ -1681,7 +1687,7 @@
 	* config/i386/xmmintrin.h: Include <mm_malloc.h>.
 
 2004-08-03  H.J. Lu  <hongjiu.lu@intel.com>
-	    Tanguy Fautrà <tfautre@pandora.be>
+	    Tanguy Fautr  <tfautre@pandora.be>
 
 	* config/i386/pmm_malloc.h: New file.
 

gcc/c-typeck.c

@@ -3108,7 +3108,10 @@ build_c_cast (tree type, tree expr)
       /* Ignore any integer overflow caused by the cast.  */
       if (TREE_CODE (value) == INTEGER_CST)
 	{
+	  if (EXPR_P (ovalue))
 	    TREE_OVERFLOW (value) = TREE_OVERFLOW (ovalue);
+	  else
+	    TREE_OVERFLOW (value) = 0;
 	  
 	  if (TREE_CODE_CLASS (TREE_CODE (ovalue)) == 'c')
 	    TREE_CONSTANT_OVERFLOW (value) = TREE_CONSTANT_OVERFLOW (ovalue);

gcc/tree.h

@@ -56,7 +56,7 @@ extern const char tree_code_type[];
 
 /* Returns nonzero iff CLASS is not the tree code of a type.  */
 
-#define IS_NON_TYPE_CODE_CLASS(CLASS) (strchr ("xbcdr<12se", (CLASS)) != 0)
+#define IS_NON_TYPE_CODE_CLASS(CLASS) ((CLASS) != 't')
 
 /* Returns nonzero iff CLASS is the tree-code class of an
    expression.  */
@@ -228,8 +228,6 @@ struct tree_common GTY(())
 	   ??? and other expressions?
        TREE_PUBLIC in
            VAR_DECL or FUNCTION_DECL or IDENTIFIER_NODE
-       TREE_VIA_PUBLIC in
-           TREE_LIST or TREE_VEC
        ASM_VOLATILE_P in
            ASM_EXPR