sometimes swap operands in expressions with side-effects

diff --git a/lang/cem/cemcom.ansi/ch3bin.c b/lang/cem/cemcom.ansi/ch3bin.c
index 72bd477..0c4fe07 100644 (file)
--- a/lang/cem/cemcom.ansi/ch3bin.c
+++ b/lang/cem/cemcom.ansi/ch3bin.c
@@ -340,7 +340,9 @@ mk_binop(expp, oper, expr, commutative)
        else {
                *expp = (commutative
                        && !(ex->ex_flags & EX_VOLATILE)
-                       && ( expr->ex_depth > ex->ex_depth
+                       && (expr->ex_depth > ex->ex_depth
+                           || ((expr->ex_flags & EX_SIDEEFFECTS)
+                               && !(ex->ex_flags & EX_SIDEEFFECTS))
                            || is_cp_cst(ex)))
                        ? new_oper(ex->ex_type, expr, arg_switched(oper), ex)
                        : new_oper(ex->ex_type, ex, oper, expr);