rust-lang/rust — pull request #15742 by pnkfelix (2014-07-17 13:55:01+00:00)
Title: dataflow: removed the CFGIndex to bitset mapping.

Removed `index_to_bitset` field and `_frozen` methods.

Drive-by: Added some missing docs on the `each_bit` method.

Drive-by: Put in a regular pattern: when calling `compute_id_range`, ensure `words_per_id > 0` by either asserting it or checking and returning early. (The prior code did the latter in a few cases where necessary, but debugging is much aided by the asserts.)

Fix #15019.