tree.h (fixed_zerop): Declare as taking a const_tree.

        * tree.h (fixed_zerop): Declare as taking a const_tree.
        * tree.c (fixed_zerop): Take a const_tree.

From-SVN: r127316

gcc/ChangeLog

+2007-08-09  Michael Matz  <matz@suse.de>
+
+	* tree.h (fixed_zerop): Declare as taking a const_tree.
+	* tree.c (fixed_zerop): Take a const_tree.
+
 2007-08-09  Ira Rosen  <irar@il.ibm.com>
 
 	* tree-vect-transform.c (vectorizable_store): Remove call to

gcc/tree.c

@@ -1460,7 +1460,7 @@ integer_nonzerop (const_tree expr)
 /* Return 1 if EXPR is the fixed-point constant zero.  */
 
 int
-fixed_zerop (tree expr)
+fixed_zerop (const_tree expr)
 {
   return (TREE_CODE (expr) == FIXED_CST
 	  && double_int_zero_p (TREE_FIXED_CST (expr).data));

gcc/tree.h

@@ -4429,7 +4429,7 @@ extern tree num_ending_zeros (const_tree);
 /* fixed_zerop (tree x) is nonzero if X is a fixed-point constant of
    value 0.  */
 
-extern int fixed_zerop (tree);
+extern int fixed_zerop (const_tree);
 
 /* staticp (tree x) is nonzero if X is a reference to data allocated
    at a fixed address in memory.  Returns the outermost data.  */