[Hardware] Compiler optimizations on OO hardware

Matthew Fulmer tapplek at gmail.com
Sun Jul 1 22:07:33 UTC 2007

My professor showed me this paper on compiler optimizations that
can be applied to make asynchronous message passing fast on
current multicore processors:

I wonder exactly what hardware features could make this even

My first guess is tagging; by tagging I mean that some objects
could be stored un-boxed, and so preventing an additional memory
lookup to determine the class of the object.  Tagging seems to
mean different things to different people; what I mean is that
every word would have a few extra bits that the CPU would
generally ignore, and so were free to be used by the programmer
any way they want. One use would be to use the extra bits to
store some type information; for example, one could use one code
to represent pointers, another for integers, another for future
objects, etc. Some classes could be fully represented with just
a one-word pointer, like Smalltalk does with SmallIntegers.

What other ways could this be better?

Matthew Fulmer -- http://mtfulmer.wordpress.com/
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