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bors 4a03f14b09 Auto merge of #110569 - saethlin:mir-pass-cooperation, r=cjgillot 
Deduplicate unreachable blocks, for real this time

In https://github.com/rust-lang/rust/pull/106428 (in particular 41eda69516) we noticed that inlining `unreachable_unchecked` can produce duplicate unreachable blocks. So we improved two MIR optimizations: `SimplifyCfg` was given a simplify to deduplicate unreachable blocks, then `InstCombine` was given a combiner to deduplicate switch targets that point at the same block. The problem is that change doesn't actually work.

Our current pass order is
```
SimplifyCfg (does nothing relevant to this situation)
Inline (produces multiple unreachable blocks)
InstCombine (doesn't do anything here, oops)
SimplifyCfg (produces the duplicate SwitchTargets that InstCombine is looking for)
```

So in here, I have factored out the specific function from `InstCombine` and placed it inside the simplify that produces the case it is looking for. This should ensure that it runs in the scenario it was designed for.

Fixes https://github.com/rust-lang/rust/issues/110551
r? `@cjgillot`
2023-04-21 15:08:02 +00:00
..
assembly Add inline assembly support for m68k 2023-04-12 17:58:15 -07:00
auxiliary
codegen Auto merge of #109993 - scottmcm:transmute-niches, r=oli-obk 2023-04-20 10:46:13 +00:00
codegen-units Turn off inlining for codegen-unit tests 2023-04-07 15:46:45 -04:00
debuginfo ci: add a runner for vanilla LLVM 16 2023-04-16 11:50:20 -07:00
incremental Add incremental tests. 2023-04-20 18:01:15 +00:00
mir-opt Auto merge of #110569 - saethlin:mir-pass-cooperation, r=cjgillot 2023-04-21 15:08:02 +00:00
pretty Auto merge of #108148 - parthopdas:master, r=oli-obk 2023-03-20 03:24:27 +00:00
run-make Bless coverage. 2023-04-20 21:36:22 +00:00
run-make-fulldeps Bless run-make-fulldeps test. 2023-04-20 18:03:33 +00:00
run-pass-valgrind
rustdoc Add regression test for #46506 2023-04-20 17:49:13 +02:00
rustdoc-gui Auto merge of #110252 - matthiaskrgr:rollup-ovaixra, r=matthiaskrgr 2023-04-12 22:19:29 +00:00
rustdoc-js rustdoc-search: add support for nested generics 2023-04-14 14:55:45 -07:00
rustdoc-js-std rustdoc-search: add support for nested generics 2023-04-14 14:55:45 -07:00
rustdoc-json Update tests for rustc_doc_primitive 2023-03-30 22:56:52 +02:00
rustdoc-ui Add a failing rustdoc-ui test for public infinite recursive type 2023-04-18 14:13:44 +02:00
ui Auto merge of #96840 - cjgillot:query-feed, r=oli-obk 2023-04-21 08:04:58 +00:00
ui-fulldeps Add Call terminator to SMIR 2023-04-20 12:00:41 -03:00
COMPILER_TESTS.md