Rewrite exhaustiveness in one pass
This is at least my 4th attempt at this in as many years x) Previous attempts were all too complicated or too slow. But we're finally here!
The previous version of the exhaustiveness algorithm computed reachability for each arm then exhaustiveness of the whole match. Since each of these steps does roughly the same things, this rewrites the algorithm to do them all in one go. I also think this makes things much simpler.
I also rewrote the documentation of the algorithm in depth. Hopefully it's up-to-date and easier to follow now. Plz comment if anything's unclear.
r? `@oli-obk` I think you're one of the rare other people to understand the exhaustiveness algorithm?
cc `@varkor` I know you're not active anymore, but if you feel like having a look you might enjoy this :D
Fixes https://github.com/rust-lang/rust/issues/79307
Update cargo
7 commits in 71cd3a926f0cf41eeaf9f2a7f2194b2aff85b0f6..9b13310ca596020a737aaa47daa4ed9ff8898a2f
2023-11-20 15:30:57 +0000 to 2023-11-24 16:20:51 +0000
- feat: Add `CARGO_RUSTC_CURRENT_DIR` (unstable) (rust-lang/cargo#12996)
- Exited with hard error when custom build file no existence or not in package (rust-lang/cargo#12995)
- try running on windows (rust-lang/cargo#13042)
- refactor(toml): Better abstract inheritance details (rust-lang/cargo#13021)
- cargo-test-support: Add features to the default Cargo.toml file (rust-lang/cargo#12997)
- Migrate rustfix to the cargo repo (rust-lang/cargo#13005)
- typo: rusc -> rustc (rust-lang/cargo#13019)
---
This also removes the check to ensure that `rustfix` between
* src/tools/cargo
* src/tools/compiletest
has the same version,
since `rust-lang/rustfix` has migrated to under `rust-lang/cargo`.
r? ghost
Remove `HirId` from `QPath::LangItem`
Remove `HirId` from `QPath::LangItem`, since there was only *one* use-case (`ObligationCauseCode::AwaitableExpr`), which we can instead recover by walking the HIR tree.
Yeet `mir::Const::from_anon_const`
Only had one callsite which was easily simplified.
Uplifted a comment that I think is much more useful living in `ty::Const` world.
Subtree sync for rustc_codegen_cranelift
The main highlights this time are implementing a bunch of new vendor intrinsics and fixing some existing ones. And fixing polymorphization for coroutines.
r? `@ghost`
`@rustbot` label +A-codegen +A-cranelift +T-compiler
run the provenance-gc=1 test on all targets, but only for the host tests
No need to slow down *all those tests* running on the Linux host... but lets cover each major OS at least once. We've had bugs that only some macOS-specific code in `getrandom` found, after all.
Let's see how much this affects timing on the macOS / Windows runners.
before: only on Linux host, all tests
after: only the test suite itself (not cargo-miri or the mir-opt-level=4 run),
on all hosts for the host target and on Linux for all "full" targets.
Move stuff around on `stable_mir` and `rustc_smir` crate
1. Break down rustc_smir/mod.rs file.
- This file was getting too big and causing a lot of merge conflicts.
All these changes shouldn't be visible to users since this module is private.
2. Move the compiler interface defs to its own module
- Separate items that are exposed in the `stable_mir` crate to be used
by the compiler from items that we expect to be used by tool developers.
Relate Inherent Associated Types using eq
We should call `eq` instead of `sup` as we're relating `Ty` directly and not `Binder<TraitRef>`.
This is part of #118118 but unrelated to that PR.
r? `@compiler-errors` `@lcnr`
Move EagerResolution to rustc_infer::infer::resolve
`EagerResolver` fits better in `rustc_infer::infer::resolver`.
Started to disentagle #118118 that has a lot of unrelated things.
r? `@compiler-errors` `@lcnr`
Replace `option.map(cond) == Some(true)` with `option.is_some_and(cond)`
Requested by `@fmease` in https://github.com/rust-lang/rust/pull/118226#pullrequestreview-1747432292.
There is also a much larger number of `option.map_or(false, cond)` that can be changed separately if someone wants.
r? fmease
