Extend Polonius fact generation for (some) move tracking
This PR will extend rustc to emit facts used for tracking moves and initialization in Polonius. It is most likely the final part of my master's thesis work.
Rollup of 15 pull requests
Successful merges:
- #62860 (Stabilize checked_duration_since for 1.38.0)
- #63549 (Rev::rposition counts from the wrong end)
- #63985 (Stabilize pin_into_inner in 1.39.0)
- #64005 (Add a `Place::is_indirect` method to determine whether a `Place` contains a `Deref` projection)
- #64031 (Harden `param_attrs` test wrt. usage of a proc macro `#[attr]`)
- #64038 (Check impl trait substs when checking for recursive types)
- #64043 (Add some more tests for underscore imports)
- #64092 (Update xLTO compatibility table in rustc book.)
- #64110 (Refer to "`self` type" instead of "receiver type")
- #64120 (Move path parsing earlier)
- #64123 (Added warning around code with reference to uninit bytes)
- #64128 (unused_parens: account for or-patterns and `&(mut x)`)
- #64141 (Minimize uses of `LocalInternedString`)
- #64142 (Fix doc links in `std::cmp` module)
- #64148 (fix a few typos in comments)
Failed merges:
r? @ghost
Minimize uses of `LocalInternedString`
`LocalInternedString` is described as "An alternative to `Symbol` and `InternedString`, useful when the chars within the symbol need to be accessed. It is best used for temporary values."
This PR makes the code match that comment, by removing all non-local uses of `LocalInternedString`. This allows the removal of a number of operations on `LocalInternedString` and a couple of uses of `unsafe`.
Added warning around code with reference to uninit bytes
Officially, uninitialized integers, and therefore, Rust references to them are _invalid_ (note that this may evolve into official defined behavior (_c.f._, https://github.com/rust-lang/unsafe-code-guidelines/issues/71)).
However, `::std` uses references to uninitialized integers when working with the `Read::initializer` feature (#42788), since it relies on this unstably having defined behavior with the current implementation of the compiler (IIUC).
Hence the comment to disincentivize people from using this pattern outside the standard library.
Update xLTO compatibility table in rustc book.
This is a combination known to work reliable when building Firefox on all the major platforms.
r? @alexcrichton
Add a `Place::is_indirect` method to determine whether a `Place` contains a `Deref` projection
Working on #63860 requires tracking some property about each local. This requires differentiating `Place`s like `x` and `x.field[index]` from ones like `*x` and `*x.field`, since the first two will always access the same region of memory as `x` while the latter two may access any region of memory. This functionality is duplicated in various places across the compiler. This PR adds a helper method to `Place` which determines whether that `Place` has a `Deref` projection at any point and changes some existing code to use the new method.
I've not converted `qualify_consts.rs` to use the new method, since it's not a trivial conversion and it will get replaced anyway by #63860. There may be other potential uses besides the two I change in this PR.
r? @oli-obk
Allow checking of run-pass execution output in compiletest
Closes#63751
Adds a `check-run-results` flag to compiletest headers, which if enabled checks the output of the execution of a run-pass test's binary against expected output.
Add Result::cloned{,_err} and Result::copied{,_err}
This is a little nice addition to `Result`.
1. I'm not sure how useful are `cloned_err` and `copied_err`, but for the sake of completeness they are here.
2. Naming is similar to `map`/`map_err`. I thought about naming `cloned` as `cloned_ok` and add another method called `cloned` that clones both Ok and Err, but `cloned_ok` should be more prevalent than `cloned_both`.
- var_starts_path
- parent
- initialized_at
- moved_out_at
This also switches to the intended emission of `var_drop_used` fact emission,
where that fact is always emitted on a drop-use of a variable, regardless of its
initialization status, as Polonius now handles that.
And remove the `unsafe` blocks, they're not necessary.
Also rewrite `InternedString::{with,with2}` to use the new functions.
Finally, add some comments about the speed of the
`as_str()`/`as_interned_str()` functions.
The remote-test-client outputs a message of the form "uploaded
"<build_dir>/<executable_path>", waiting for result" onto stdout when
executing a test, which is then captured in the process result. This needs to be removed when
comparing the results of the run-pass test execution.
Rollup of 5 pull requests
Successful merges:
- #64049 (Emit a single error on if expr with expectation and no else clause)
- #64056 (Account for arbitrary self types in E0599)
- #64058 (librustc_errors: Extract sugg/subst handling into method)
- #64071 (use just one name when parameters and fields are the same)
- #64104 (Emit error on intrinsic to fn ptr casts)
Failed merges:
r? @ghost
