Re: Two questions about compiler design

Peter Gammie <peteg@cse.unsw.EDU.AU>
12 Feb 2004 11:00:37 -0500

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From: Peter Gammie <peteg@cse.unsw.EDU.AU>
Newsgroups: comp.compilers
Date: 12 Feb 2004 11:00:37 -0500
Organization: Compilers Central
References: 04-02-087 04-02-030 04-02-069 04-02-087
Keywords: optimize, Java
Posted-Date: 12 Feb 2004 11:00:37 EST

On Mon, 8 Feb 2004, Isaac wrote:


> > If you want some intermediate languages the following are possibles
> > Java Virtual Machine Code (the language Java compiles to) MicroSoft
>
> Are java bytecodes well suited for doing optimizations? They don't seem
> to me to be a great choice for an intermediate language.


No. Have a look at this issue of the IBM Systems Journal:


http://www.research.ibm.com/journal/sj39-1.html


I don't doubt things have changed since I last looked at Java, but I'd be
willing to bet that the JVM JITCs are still trying to recover nicer
tree-like objects from bytecode.


cheers
Peter

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