Michael McLoughlin b3644ec7fc pass: tweak ordering in liveness analysis ...

Previously we updated the set of live in registers before live out. This
was extremely inefficient, since on each pass through live in depends on
live out.

We also change to processing the instructions in reverse order, which is
more likely to be efficient, although we should replace this with
topological sort order soon.

2018-12-24 12:48:29 -08:00

2.7 KiB

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