Hi Factorers, I modified the Factor compiler to be more aware of constants. For example, now, "5 [ foo ] dip" is transformed to "foo 5" (avoiding an unnecessary store and reload to the retain stack) and the low-level IR is aware of constants defined in other basic blocks (even if there is an intervening subroutine call) using data collected in high-level IR. This allows value numbering and the constant folding it performs to be more effective. The results are in the branch constant-propagation in the main Factor repository. All together, it's maybe 30 extra lines of code for this change. Slava, do you think this should be merged into the main branch?
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