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(merge: d8bdb3f 0f4c5fb)
Rollup merge of #66612 - Nadrieril:or-patterns-initial, r=varkor
authorMazdak Farrokhzad <twingoow@gmail.com>
Sat, 30 Nov 2019 15:56:45 +0000 (16:56 +0100)
committerGitHub <noreply@github.com>
Sat, 30 Nov 2019 15:56:45 +0000 (16:56 +0100)
commit3af14f994d7d5f0cef7d1f15bcfe6cab40685244
treed1e24bea8f996aba4d447ecfdf809279196c31adtree | snapshot
parentd8bdb3fdcbd88eb16e1a6669236122c41ed2aed3commit | diff
parent0f4c5fb20cf5d499bc3d6426b1909863f1c86a5bcommit | diff
Rollup merge of #66612 - Nadrieril:or-patterns-initial, r=varkor

Initial implementation of or-pattern usefulness checking

The title says it all.
I'd like to request a perf run on that, hopefully this doesn't kill performance too much.

cc https://github.com/rust-lang/rust/issues/54883
src/librustc_mir/build/matches/test.rs diff1 | diff2 | blob | history
src/librustc_mir/hair/pattern/_match.rs diff1 | diff2 | blob | history
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