rustc: Move jemalloc from rustc_driver to rustc
This commit moves jemalloc to just the rustc binary rather than the
rustc_driver shared library, enusring that it's only used for binaries
that opt-in to it like rustc rather than other binaries using
librustc_driver like rustdoc/rls/etc. This will hopefully address #56980
bootstrap: Link LLVM as a dylib with ThinLTO
When building a distributed compiler on Linux where we use ThinLTO to
create the LLVM shared object this commit switches the compiler to
dynamically linking that LLVM artifact instead of statically linking to
LLVM. The primary goal here is to reduce CI compile times, avoiding two+
ThinLTO builds of all of LLVM. By linking dynamically to LLVM we'll
reuse the one ThinLTO step done by LLVM's build itself.
Lots of discussion about this change can be found [here] and down. A
perf run will show whether this is worth it or not!
[here]: https://github.com/rust-lang/rust/pull/53245#issuecomment-417015334
box: Add documentation for `From` impls
This is a part of #51430. A brief description of the behaviour and examples are added to the documentation.
I am not sure what sort of examples to put for the `From` for `Pin` as my [code](https://play.rust-lang.org/?version=nightly&mode=debug&edition=2015&gist=97c908f44e41c9faeffec5b61d72a03e) doesn't even manage to compile using the nightly build.
Somehow I feel that I missed out something so do let me know if more information is needed in the documentation or any of the examples require change.
Rollup of 14 pull requests
Successful merges:
- #56188 (enum type instead of variant suggestion unification )
- #56342 (Improve docs for collecting into `Option`s)
- #56916 (Fix mutable references in `static mut`)
- #56917 (Simplify MIR generation for logical operations)
- #56939 (Pin stabilization)
- #56953 (Mark tuple structs as live if their constructors are used)
- #56964 (Remove `TokenStream::JointTree`.)
- #56966 (Correct strings for raw pointer deref and array access suggestions)
- #57020 (Point to cause of `fn` expected return type)
- #57032 (fix deprecation warnings in liballoc benches)
- #57053 (Fix alignment for array indexing)
- #57062 (Fix a comment)
- #57067 (Stabilize min_const_unsafe_fn in 1.33)
- #57078 (Ignore two tests on s390x)
Failed merges:
r? @ghost
submodules: update clippy from a416c5e0 to fc24fce7
Fixes clippy tool state
Changes:
````
FIXME > TODO
rustup https://github.com/rust-lang/rust/pull/56992
Document map_clone known problems #498
Remove header link
test: panic at map_unit_fn.rs:202 for map() without args
rm unused file map_unit_fn.stderr
panic at map_unit_fn.rs:202 for map() without args
Change contrib.md hierarchy, link to it from readme
Workaround rust-lang/rust#43081
Teach `suspicious_else_formatting` about `if .. {..} {..}`
Link to `rustc_driver` crate in plugin
mutex_atomic: Correct location of AtomicBool and friends
Update README local run command to specify syspath
Do not mark as_ref as useless if it's followed by a method call
Changes lint sugg to bitwise and operator `&`
Run update_lints after renaming
Rename lint to MODULE_NAME_REPETITIONS
Add renaming tests
Move renaming to the right place
Implements lint for order comparisons against bool
fix(module_name_repeat): Try to register renamed lint, not valid yet
Fix an endless loop in the tests.
Fix `implicit_return` false positives.
chore(moduel_name_repeat): Rename stutter lint to module_name_repeat to avoid ableist language
Make integration tests fail on 'E0463'
base tests: make sure cargo-clippy binary can be called directly
Revert "Merge pull request #3257 from o01eg/remove-sysroot"
````
r? @oli-obk
Fix alignment for array indexing
We need to reduce the alignment with the used offset. If the offset isn't known, use the element size, as this will yield the minimum possible alignment.
This handles both direct array indexing, and array repeat expressions.
Fixes#56927.
r? @nagisa
Remove `TokenStream::JointTree`.
This is done by adding a new `IsJoint` field to `TokenStream::Tree`,
which simplifies a lot of `match` statements. And likewise for
`CursorKind`.
The commit also adds a new method `TokenTree:stream()` which can replace
a choice between `.into()` and `.joint()`.
Pin stabilization
This implements the changes suggested in https://github.com/rust-lang/rust/issues/55766#issue-378417538 and stabilizes the `pin` feature. @alexcrichton also listed several "blockers" in that issue, but then in [this comment](https://github.com/rust-lang/rust/issues/55766#issuecomment-445074980) mentioned that they're more "TODO items":
> In that vein I think it's fine for a stabilization PR to be posted at any time now with FCP lapsed for a week or so now. The final points about self/pin/pinned can be briefly discussed there (if even necessary, they could be left as the proposal above).
Let's settle these last bits here and get this thing stabilized! :)
r? @alexcrichton
cc @withoutboats
Improve docs for collecting into `Option`s
Changes the original example to use more idiomatic formatting as well
as `.checked_add`. Also adds a second example to show a case where the
`.collect` returns `None`.
enum type instead of variant suggestion unification
Fixes#56028.
Weirdly, we were deciding between a help note and a structured suggestion based on whether the import candidate span was a dummy—but we weren't using that span in any case! The dummy-ness of the span (which appears to be a matter of this-crate vs. other-crate definition) isn't the right criterion by which we should decide whether it's germane to mention that "there is an enum variant"; instead, let's use the someness of `def` (which is used as the `has_unexpected_resolution` argument to `error_code`).
Since `import_candidate_to_paths` has no other callers, we are free to stop returning the span and rename the function. By using `span_suggestions_`, we leverage the max-suggestions output limit already built in to the emitter, thus resolving #56028.
In the matter of message wording, "you can" is redundant (and perhaps too informal); prefer the imperative.
In a second commit, we do some unprincipled special-casing to correct and beautify suggestions for `Option` and `Result` (where the existing code was being confused by their being reexported in the prelude).
r? @davidtwco
Changes the original example to use more idiomatic formatting as well
as `.checked_add`. Also adds a second example to show a case where the
`.collect` returns `None`.
Fixes clippy tool state
Changes:
````
FIXME > TODO
rustup https://github.com/rust-lang/rust/pull/56992
Document map_clone known problems #498
Remove header link
test: panic at map_unit_fn.rs:202 for map() without args
rm unused file map_unit_fn.stderr
panic at map_unit_fn.rs:202 for map() without args
Change contrib.md hierarchy, link to it from readme
Workaround rust-lang/rust#43081
Teach `suspicious_else_formatting` about `if .. {..} {..}`
Link to `rustc_driver` crate in plugin
mutex_atomic: Correct location of AtomicBool and friends
Update README local run command to specify syspath
Do not mark as_ref as useless if it's followed by a method call
Changes lint sugg to bitwise and operator `&`
Run update_lints after renaming
Rename lint to MODULE_NAME_REPETITIONS
Add renaming tests
Move renaming to the right place
Implements lint for order comparisons against bool
fix(module_name_repeat): Try to register renamed lint, not valid yet
Fix an endless loop in the tests.
Fix `implicit_return` false positives.
chore(moduel_name_repeat): Rename stutter lint to module_name_repeat to avoid ableist language
Make integration tests fail on 'E0463'
base tests: make sure cargo-clippy binary can be called directly
Revert "Merge pull request #3257 from o01eg/remove-sysroot"
````
rustc: Update Clang used to build LLVM on Linux
This commit updates from LLVM 7.0.0 to git revisions of clang/llvm/lld
to build LLVM on our dist builders for Linux. The goal of this is to
fix#56849 by picking up a fix [1] in LLD.
Closes#56849
[1]: 3be4e82db7
Weirdly, we were deciding between a help note and a structured
suggestion based on whether the import candidate span was a dummy—but
we weren't using that span in any case! The dummy-ness of the span
(which appears to be a matter of this-crate vs. other-crate
definition) isn't the right criterion by which we should decide
whether it's germane to mention that "there is an enum variant";
instead, let's use the someness of `def` (which is used as the
`has_unexpected_resolution` argument to `error_code`).
Since `import_candidate_to_paths` has no other callers, we are free to
stop returning the span and rename the function. By using
`span_suggestions_`, we leverage the max-suggestions output limit
already built in to the emitter, thus resolving #56028.
In the matter of message wording, "you can" is redundant (and perhaps
too informal); prefer the imperative.
Fix rustdoc-js tests
Fixes rustdoc-js tests by teaching tester.js how to handle single-line js comments.
Also, added speculative support for template strings, and warnings for future debuggers.
Update migrate warning wording.
This PR modifies the wording of the warning for backwards-incompatible changes in migrate mode. The warning messages are changed to be lowercase and not include line-breaks in order to be consistent with other compiler diagnostics.
Fix stabilization version numbers (exhaustive_integer_patterns + macro_literal_matcher)
+ `exhaustive_integer_patterns` slipped 1.32; merged in 1.33 -- https://github.com/rust-lang/rust/pull/56362
+ `macro_literal_matcher` isn't stable on current stable (1.31) but is on beta (1.32).
r? @varkor
Fix feature gate to point to 1.32.0 for `path_from_str`
When the feature has been added back (#55148) the feature gate has not
been adjusted accordingly. We have it enabled for 1.32.0, currently in
Beta, so adjust it.
Refs: #44431.
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
rustdoc: add new CLI flag to load static files from a different location
This PR adds a new CLI flag to rustdoc, `--static-root-path`, which controls how rustdoc links pages to the CSS/JS/font static files bundled with the output. By default, these files are linked with a series of `../` which is calculated per-page to link it to the documentation root - i.e. a relative link to the directory given by `-o`. This is causing problems for docs.rs, because even though docs.rs has saved one copy of these files and is dispatching them dynamically, browsers have no way of knowing that these are the same files and can cache them. This can allow it to link these files as, for example, `/rustdoc.css` instead of `../../rustdoc.css`, creating a single location that the files are loaded from.
I made sure to only change links for the *static* files, those that don't change between crates. Files like the search index, aliases, the source files listing, etc, are still linked with relative links.
r? @GuillaumeGomez
cc @onur
Adding unwinding support for x86_64_fortanix_unknown_sgx target.
Unwinding support is provided by our port of LLVM's libunwind which is available from https://github.com/fortanix/libunwind/tree/release_50.
libunwind requires support for rwlock and printing to stderr, which is only provided by `std` for this target. This poses two problems: 1) how to expose the `std` functionality to C and 2) dependency inversion.
### Exposing `std`
For exposing the functionality we chose to expose the following symbols:
* __rust_rwlock_rdlock
* __rust_rwlock_wrlock
* __rust_rwlock_unlock
* __rust_print_err
* __rust_abort
Also, the following are needed from `alloc`:
* __rust_alloc
* __rust_dealloc
#### Rust RWLock in C
In `libunwind`, RWLock is initialized as a templated static variable:
```c
pthread_rwlock_t DwarfFDECache<A>::_lock = PTHREAD_RWLOCK_INITIALIZER;
```
I don't know of a good way to use the Rust sys::rwlock::RWLock type and initializer there. We could have a static global variable in Rust, but that doesn't work with the templating. The variable needs to be initialized statically, since this target doesn't support the .init section. Currently, I just used a byte array and standard C array initialization. The mapping between this C type and the Rust type needs to be manually maintained. There is a compile-time check and a unit test to make sure the Rust versions of these C definitions match the actual Rust type. If any reviewer knows of a better solution, please do tell.
### Dependency inversion issue
`std` depends on `panic_unwind` which depends on `libunwind`, and `libunwind` depends on `std`. This is not normally supported by Rust's linking system. Therefore we use raw C exports from `std` *and* `libunwind.a` is linked last in the target `post_link_objects` instead of being built as part of the Rust `libunwind`. Currently, all C exports are defined in `src/libstd/sys/sgx/rwlock.rs` to overcome LTO issues. Only the `__rust_rwlock_*` definitions *need* to live there for privacy reasons. Once again, if any reviewer knows of a better solution, please do tell.
r? @alexcrichton
