implementing escape analysis

[Per Bothner]

David Daney wrote:
> An object allocated by _Jv_AllocObject can not be stack allocated as it 
> has a finalizer, but one allocated with _Jv_AllocObjectNoFinalizer can 
> be, so there has to be some differentiation between all these different 
> cases.

Stack allocating objects with finalizers is straight-forward.
C++ has done it for decades.
-- 
	--Per Bothner
per@bothner.com   http://per.bothner.com/