b785fdb80b
match lowering: simplify block creation Match lowering was doing complicated things with block creation. As far as I can tell it was trying to avoid creating unneeded blocks, but of the three places that start out with `otherwise = &mut None`, two of them called `otherwise.unwrap_or_else(|| self.cfg.start_new_block())` anyway. As far as I can tell the only place where this PR makes a difference is in `lower_match_tree`, which did indeed sometimes avoid creating the unreachable final block + FakeRead. Unless this is important I propose we do the naive thing instead. I have not checked all the graph isomorphisms by hand, but at a glance the test diff looks sensible. r? `@matthewjasper` |
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The Rust Programming Language
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