*** empty log message ***

From-SVN: r1005

1 files changed, 15 insertions, 1 deletions

diff --git a/gcc/c-typeck.c b/gcc/c-typeck.c
index 2de86ae..751a258 100644
--- a/gcc/c-typeck.c
+++ b/gcc/c-typeck.c
@@ -782,6 +782,17 @@ c_alignof (type)
 
   return size_int (TYPE_ALIGN (type) / BITS_PER_UNIT);
 }
+
+/* Print a warning if a constant expression had overflow in folding.
+   This doesn't really work--it is waiting for changes in fold.  */
+
+void
+constant_expression_warning (value)
+     tree value;
+{
+  if (TREE_CODE (value) == NON_LVALUE_EXPR && TREE_CONSTANT_OVERFLOW (value))
+    pedwarn ("overflow in constant expression");
+}
 
 /* Implement the __alignof keyword: Return the minimum required
    alignment of EXPR, measured in bytes.  For VAR_DECL's and
@@ -3013,7 +3024,7 @@ build_unary_op (code, xarg, noconvert)
 	  return error_mark_node;
 
 	/* Report a read-only lvalue.  */
-	if (TYPE_READONLY (TREE_TYPE (arg)))
+	if (TREE_READONLY (arg))
 	  readonly_warning (arg, 
 			    ((code == PREINCREMENT_EXPR
 			      || code == POSTINCREMENT_EXPR)
@@ -4203,6 +4214,9 @@ store_init_value (decl, init)
     }
 #endif
 
+  /* ANSI wants warnings about out-of-range constant initializers.  */
+  constant_expression_warning (value);
+
   DECL_INITIAL (decl) = value;
 }