OT: Alloca in Java, was Re: [cdt-dev] Post 2.0 milestones

[Johan Walles <walles@xxxxxx>]

Douglas Schaefer wrote:
> Now if only I can alloca in Java...

I don't know about other VMs, but at least JRockit does roughly that for objects 
 that are used only locally.  If the optimizer can prove that an object doesn't 
escape its current stack frame, the used fields of the object are put in 
registers and the object never reaches the heap (and thus doesn't have to be 
garbage collected either).  Fields that can't be put in registers are spilled 
onto the stack.

  //Johan