http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21855
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
Component|tree-optimization |java
--- Comment #15 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-01-10
16:20:13 UTC ---
(In reply to comment #14)
> (In reply to comment #13)
> > We can't optimize this because System.out.println can change args[].
>
> That's the whole point: System.out.println cannot change args[], which is a
> java array, and the length of a Java array is constant. It is not an invalid
> test case.
I suppose
public static void main(String[] args)
is passing args by value (but the implementation detail uses reference
passing for efficiency?). In this case the Java frontend should do
like the C++ frontend and tell this to the middle-end by properly
marking args as 1) DECL_BY_REFERENCE, 2) use a TYPE_RESTRICT qualified
pointer for the reference. Then we would optimize this case.
Java frontend issue.
