[Sbcl-devel] SBCL optimization problems? un-necessary boxing

[John K. <jk2...@ya...>]

Hello,

I think I've found some instances in which SBCL 10.0.10 running on a G5 Mac
boxes when it shouldn't.

1) essentially identical code boxes in one case, and not in the other. The
difference is the way   that (values FLOAT T) is returned, either from multiple
places in a block or at the end of the defun.

2) ROUND boxes, but FLOOR and CEILING do not.  But one can write a ROUND macro
that uses floor, and does not box.

Code to demonstrate both problems is attached, with an expanation at top.
Apologies for the length - the first error is hard to replicate in shorter
functions. And apologies in advance if this is due to some error on my part.


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