Hi Rémi, you mention And now the trick, there is a nice way (several in fact) to explain to the JIT that even if the bytecode contains tests, if the variable contains effectively an int, it's a good idea to remove them.
Ok, in Smalltalk there are some methods which are usually integer ops so its easy to determine vars that are likely integer. I have slots in the stack reserved for just this idea. So if I have a pair of slots A and B where A would be the integer from and B the reference. Would I test B to be null and if so do an integer op on A? So plese point me at the bytecode tricks that make the test go away. regards mark
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