Jikes RVM 2.4.3 available

Jikes RVM version 2.4.3 is now available for download from sourceforge.net at

Jikes RVM 2.4.3 Release Notes (released February 24, 2006)
The recommended version of GNU classpath for Jikes RVM 2.4.3 is 0.20.
Classpath 0.19 and 0.18 are likely to still work, but have not been tested.
Support for all version of GNU classpath prior to 0.18 has been removed.

*** Simple GC sanity checking tool added to MMTk. Contact: Daniel Frampton.

** The RVM bootimage is now generated into two separate files, one for
code and one for data. These files are mapped separately into distinct
address ranges. As a result of this change, instead of defining
BOOTIMAGE_LOAD_ADDRESS in your config file, you must define
All the default configu files (rvm/config/
) have been updated,
but if you have local copies of these files, you will need to update them.

*** Loop Versioning optimization in the opt compiler
contributed by Ian Rogers and Jisheng Zhao.
Loop versioning replicates loop bodies and removes from one of
those loop bodies runtime exceptions that can be explicitly
tested. The phase runs as an SSA optimization so as only to
consider true dependencies. To capture the loop structure the
phase uses an annotated LST node. The annotations capture
information about the initial and terminal loop iterator values,
as well as the loop iterator instructions. This phase is currently
disabled by default until we can fix bugs in the optimizing compiler
that it exposes.

*** The optimizing compiler's Local CSE pass now exploits commutativity,
patch contributed by Bernardo Pastorelli.

** Bug fixes
defect 1240267: remove FIXED_JTOC option
defect 1411486: Bug in IA32 BT (Bit Test) instruction

Posted by Dave Grove 2006-02-24

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