gcc/c-family/c-warn.c

183 		       enum tree_code ARG_UNUSED (code_right), tree op_right)
203       || from_macro_expansion_at (EXPR_LOCATION (op_right)))
211   STRIP_ANY_LOCATION_WRAPPER (op_right);
212   if (TREE_CODE (op_right) == CONST_DECL)
214     op_right = DECL_INITIAL (op_right);
221       && TREE_CODE (op_right) == INTEGER_CST
222       && !integer_zerop (op_right)
223       && !integer_onep (op_right))
242       || CONSTANT_CLASS_P (fold_for_warn (op_right)))
248       || !(truth_value_p (TREE_CODE (op_right))
249 	   || INTEGRAL_TYPE_P (TREE_TYPE (op_right))))
254       || VECTOR_TYPE_P (TREE_TYPE (op_right)))
276   op_right = unshare_expr (op_right);
277   walk_tree_without_duplicates (&op_right, unwrap_c_maybe_const, NULL);
278   rhs = make_range (op_right, &in1_p, &low1, &high1, &strict_overflow_p);