Re: [RFC] Contributing tree-ssa to mainline

[Tom Tromey <tromey at redhat dot com>]

>>>>> "Richard" == Richard Kenner <kenner@vlsi1.ultra.nyu.edu> writes:

>     Even if tree-SSA didn't made important speedups for common C programs I
>     think this is not problem as long as it is not making C worse and do
>     make C++ and Java better.

Richard> Can similar cases as those shown for C++ be constructed and
Richard> measured for Java?

I wouldn't expect to find Java equivalents of the C++ abstraction
penalty tests, since Java doesn't have stack-allocated objects.  (My
understanding is that we improve on these tests due to being able to
split up and register-ize stack-allocated objects...)

Right now I think the tree-ssa benefits to Java are more potential
than actual.  In the future we hope to get array bounds check
elimination, elimination of redundant type checks, and perhaps
elimination of redundant class initialization.

Tom