On 05/01/2016 12:39 PM, Martin Sebor wrote:
+ if (TREE_CODE (arg0) == INTEGER_CST && TREE_CODE (arg1) == INTEGER_CST)
+ {
+ if (tree result = size_binop_loc (EXPR_LOC_OR_LOC (t, input_location),
+ opcode, arg0, arg1))
+ {
+ if (TREE_OVERFLOW (result))
+ {
+ /* Reset TREE_OVERFLOW to avoid warnings for the overflow. */
+ TREE_OVERFLOW (result) = 0;
+
+ return build_complex (TREE_TYPE (t), result, integer_one_node);
+ }
+
+ return build_complex (TREE_TYPE (t), result, integer_zero_node);
+ }
+ }
Should this be in the middle-end somewhere, perhaps shared with
fold_builtin_arith_overflow? I notice that the comment for that
function says that it folds into normal arithmetic if the operation can
never overflow, but I don't see any code that would accomplish that.
Jason
