inter-class optimizations

Thu Feb 19 16:39:00 GMT 2004

On 2004年2月18日, Per Bothner wrote:
> > In theory this should allow inter-class inlining and nonstandard
> > calling interfaces (register passing)... does gcj do any of this? I'm
> > using 3.3.2, but I could upgrade to something more recent if there's
> > an advantage.
>> My guess is this will becomes more advantageous with the tree-ssa
> branch - which will probably become gcc 3.5 or 4.0. Also,
> -fomit-frame-pointer is now the default (at least on x86).

The cgraphunit (aka unit-at-a-time) optimizers help too. That'll be in
3.4.
Inter-class inlining works in 3.4 branch if you build with:
gcj -c -O3 *.java -o everything.o
Only final/static/private methods and constructors can be inlined that
way. Maybe super invocations too.
Jeff