tree-ssa-ccp.c (fold_const_aggregate_ref): Use fold_convert.

	* tree-ssa-ccp.c (fold_const_aggregate_ref): Use fold_convert.

	* gcc.c-torture/execute/20070724-1.c: New.

From-SVN: r126888

gcc/ChangeLog

+2007-07-24  Daniel Jacobowitz  <dan@codesourcery.com>
+
+	* tree-ssa-ccp.c (fold_const_aggregate_ref): Use fold_convert.
+
 2007-07-24  Jan Hubicka  <jh@suse.cz>
 
 	* caller-save.c: Include ggc.h, gt-caller-save.h

gcc/testsuite/ChangeLog

+2007-07-24  Daniel Jacobowitz  <dan@codesourcery.com>
+
+	* gcc.c-torture/execute/20070724-1.c: New.
+
 2007-07-24 Paul Thomas <pault@gcc.gnu.org>
 
 	PR fortran/31205

gcc/testsuite/gcc.c-torture/execute/20070724-1.c

+void abort (void);
+
+static unsigned char magic[] = "\235";
+static unsigned char value = '\235';
+
+int main()
+{
+  if (value != magic[0])
+    abort ();
+  return 0;
+}

gcc/tree-ssa-ccp.c

@@ -1053,8 +1053,10 @@ fold_const_aggregate_ref (tree t)
 	          == MODE_INT)
 	      && GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (TREE_TYPE (ctor)))) == 1
 	      && compare_tree_int (idx, TREE_STRING_LENGTH (ctor)) < 0)
-	    return build_int_cst (TREE_TYPE (t), (TREE_STRING_POINTER (ctor)
-					          [TREE_INT_CST_LOW (idx)]));
+	    return fold_convert (TREE_TYPE (t),
+				 build_int_cst (NULL,
+						(TREE_STRING_POINTER (ctor)
+						 [TREE_INT_CST_LOW (idx)])));
 	  return NULL_TREE;
 	}