+2009-06-19 Eric Botcazou <ebotcazou@adacore.com>
+
+ * gcc-interface/trans.c (emit_check): Do not wrap up the result
+ in a SAVE_EXPR.
+ (protect_multiple_eval): Always protect complex expressions.
+
2009-06-19 Emmanuel Briot <briot@adacore.com>
* prj-ext.adb, makeutl.adb, makeutl.ads (Executable_Prefix_Path): Now
we don't need to evaluate it just for the check. */
TREE_SIDE_EFFECTS (gnu_result) = TREE_SIDE_EFFECTS (gnu_expr);
- /* ??? Unfortunately, if we don't put a SAVE_EXPR around this whole thing,
- we will repeatedly do the test and, at compile time, we will repeatedly
- visit it during unsharing, which leads to an exponential explosion. */
- return save_expr (gnu_result);
+ return gnu_result;
}
\f
/* Return an expression that converts GNU_EXPR to GNAT_TYPE, doing overflow
{
tree type = TREE_TYPE (exp);
- /* If this has no side effects, we don't need to do anything. */
- if (!TREE_SIDE_EFFECTS (exp))
+ /* If EXP has no side effects, we theoritically don't need to do anything.
+ However, we may be recursively passed more and more complex expressions
+ involving checks which will be reused multiple times and eventually be
+ unshared for gimplification; in order to avoid a complexity explosion
+ at that point, we protect any expressions more complex than a simple
+ arithmetic expression. */
+ if (!TREE_SIDE_EFFECTS (exp)
+ && (CONSTANT_CLASS_P (exp)
+ || !EXPRESSION_CLASS_P (skip_simple_arithmetic (exp))))
return exp;
/* If this is a conversion, protect what's inside the conversion.