Actually optimize in PACK-TN
authorPaul Khuong <pvk@pvk.ca>
Wed, 20 Nov 2013 00:53:02 +0000 (19:53 -0500)
committerPaul Khuong <pvk@pvk.ca>
Mon, 2 Dec 2013 03:44:43 +0000 (22:44 -0500)
commit8171400aa1d9ad318401a4d9c4c07f5f3b374556
tree67b69dc5e2f63659ab94578d9247f0b0e7abe6c4
parentd306e2d23b38487488eb93881dad836e439e0c77
Actually optimize in PACK-TN

We used to track location usage information, but never use it to
determine which register to use.  I'm not actually convinced that
this change improves the quality of the code we generate, but it
can't hurt for PACK-TN to actually do what it says it does: usage-
guided packing can always be disabled if it's not useful.
src/compiler/pack.lisp