As a side effect, we now represent most promoteds as `ConstValue::Scalar` again. This is useful because all implict promoteds are just references anyway and most explicit promoteds are numeric arguments to `asm!` or SIMD instructions.
Distribute rustc sources as part of `rustc-dev`
They can be used to provide IDE features when working on rustc plugins/backends/etc without having to locate a separate Rust checkout.
r? `@Mark-Simulacrum`
Add host triples to target lists
This PR is primarily intended to fix https://github.com/rust-lang/rustup/issues/2494, which is the second commit. That bug was introduced by #76415, and incompletely fixed by #76639. (#76639 added host triples, which gave us compilers, but missed that we also need documentation and other target-only things). However, it also removes duplicate macOS CI builders.
r? `@pietroalbini`
compare generic constants using `AbstractConst`s
This is a MVP of rust-lang/compiler-team#340. The changes in this PR should only be relevant if `feature(const_evaluatable_checked)` is enabled.
~~currently based on top of #76559, so blocked on that.~~
r? `@oli-obk` cc `@varkor` `@eddyb`
Issue 72408 nested closures exponential
This fixes#72408.
Nested closures were resulting in exponential compilation time.
This PR is enhancing asymptotic complexity, but also increasing the constant, so I would love to see perf run results.
[mir-opt] Disable the `ConsideredEqual` logic in SimplifyBranchSame opt
The logic is currently broken and we need to disable it to fix a beta
regression (see #76803)
r? `@oli-obk`
Mostly to fix ui/issues/issue-37311-type-length-limit/issue-37311.rs.
Most parts of the compiler can handle deeply nested types with a lot
of duplicates just fine, but some parts still attempt to naively
traverse type tree.
Before such problems were caught by type length limit check,
but now these places will have to be changed to handle
duplicated types gracefully.
This fixes#72408.
Nested closures were resulting in exponential compilation time.
As a performance optimization this change introduces MiniSet,
which is a simple small storage optimized set.
Improve E0118
- Changes the "base type" terminology to "nominal type" (according to the [reference](https://doc.rust-lang.org/stable/reference/items/implementations.html#inherent-implementations)).
- Suggests removing a reference, if one is present on the type.
- Clarify what is meant by a "nominal type".
closes#69392
This is my first not-entirely-trivial PR, so please let me know if I missed anything or if something could be improved. Though I probably won't be able to fix anything in the upcoming week.
Update books
## nomicon
1 commits in 25854752549d44d76fbd7650e17cb4f167a0b8fb..6e57e64501f61873ab80cb78a07180a22751a5d6
2020-08-19 16:41:48 -0400 to 2020-09-14 11:40:23 -0400
- Fix API change to alloc::Global::grow. (rust-lang-nursery/nomicon#236)
## reference
3 commits in 25391dba46262f882fa846beefaff54a966a8fa5..56a13c082ee90736c08d6abdcd90462517b703d3
2020-09-02 07:22:55 -0700 to 2020-09-14 23:20:16 -0700
- Update the description of staticlib (rust-lang-nursery/reference#884)
- Rust 1.46 now allows more features in const fn (rust-lang-nursery/reference#883)
- Document the enum changes in RFC 2195 (rust-lang-nursery/reference#879)
## book
1 commits in e5ed97128302d5fa45dbac0e64426bc7649a558c..cb28dee95e5e50b793e6ba9291c5d1568d3ad72e
2020-08-31 12:53:40 -0500 to 2020-09-09 10:06:00 -0500
- Fixed the error message of invalid array element access in ch03.2 (rust-lang/book#2446)
Change error message for ty param in const
This PR introduces the following changes:
* Change error message for type param in a const expression when using
`min_const_generics`
* Change `ParamInNonTrivialAnonConst` to contain an extra `bool` used for
distinguishing whether the passed-in symbol is a type or a value.
Fixes#76701
Add array_windows fn
This mimicks the functionality added by array_chunks, and implements a const-generic form of
`windows`. It makes egregious use of `unsafe`, but by necessity because the array must be
re-interpreted as a slice of arrays, and unlike array_chunks this cannot be done by casting the
original array once, since each time the index is advanced it needs to move one element, not
`N`.
I'm planning on adding more tests, but this should be good enough as a premise for the functionality.
Notably: should there be more functions overwritten for the iterator implementation/in general?
~~I've marked the issue as #74985 as there is no corresponding exact issue for `array_windows`, but it's based of off `array_chunks`.~~
Edit: See Issue #75027 created by @lcnr for tracking issue
~~Do not merge until I add more tests, please.~~
r? @lcnr
Add aarch64-unknown-linux-musl host builds
This adds aarch64-unknown-linux-musl to the hosts list and adds the build to the dist-arm-linux builder as `@Mark-Simulacrum` suggested to me in Zulip. `@jyn514` requested to be mentioned 😄
I had to update the config for crosstool-ng as it had a prompt about the glibc version.
I ran `src/ci/docker/run.sh dist-arm-linux` to test it.
```
Build completed successfully in 1:31:50
Compile requests 8180
Compile requests executed 8135
Cache hits 287
Cache misses 7848
Cache timeouts 0
Cache read errors 0
Forced recaches 0
Cache write errors 0
Compilation failures 0
Cache errors 0
Non-cacheable compilations 0
Non-cacheable calls 36
Non-compilation calls 9
Unsupported compiler calls 0
Average cache write 0.000 s
Average cache read miss 6.389 s
Average cache read hit 0.000 s
Cache location Local disk: "/sccache"
Cache size 202 MiB
Max cache size 10 GiB
== clock drift check ==
local time: Sun Sep 6 19:30:17 UTC 2020
network time: Sun, 06 Sep 2020 19:30:17 GMT
== end clock drift check ==
```
Only errors were in miri due to struct fields being private (already been reported [here](https://github.com/rust-lang/rust/issues/76337))
Edit: Maybe it is helpful if I add that it is a working compiler
```sh
/rust-nightly-aarch64-unknown-linux-musl # ash install.sh
install: creating uninstall script at /usr/local/lib/rustlib/uninstall.sh
install: installing component 'rustc'
install: installing component 'cargo'
install: installing component 'rls-preview'
install: installing component 'rust-analyzer-preview'
install: installing component 'clippy-preview'
install: installing component 'rustfmt-preview'
install: installing component 'llvm-tools-preview'
install: installing component 'rust-analysis-aarch64-unknown-linux-musl'
install: installing component 'rust-std-aarch64-unknown-linux-musl'
install: WARNING: failed to run ldconfig. this may happen when not installing as root. run with --verbose to see the error
Rust is ready to roll.
/ # cat test.rs
fn main() { println!("hello world"); }
/ # rustc test.rs
/ # ./test
hello world
# file test
test: ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), statically linked, not stripped
```
Updated issue to #75027
Update to rm oob access
And hopefully fix docs as well
Fixed naming conflict in test
Fix test which used 1-indexing
Nth starts from 0, woops
Fix a bunch of off by 1 errors
See https://play.rust-lang.org/?version=nightly&mode=debug&edition=2018&gist=757b311987e3fae1ca47122969acda5a
Add even more off by 1 errors
And also write `next` and `next_back` in terms of `nth` and `nth_back`.
Run fmt
Fix forgetting to change fn name in test
add nth_back test & document unsafe
Remove as_ref().unwrap()
Documented occurrences of unsafe, noting what invariants are maintained
The performance difference is negligible, but it makes me feel better.
Note that this does not remove some clones in `config`, because it would
require changing the logic around (and performance doesn't matter
for bootstrap).
Fix generating rustc docs with non-default lib directory.
If `libdir` is set in `config.toml`, then the tool to generate the rustc docs was unable to run `rustc` because it could not find the shared libraries. The solution is to set the dylib search path to include the libdir.
I changed the API of `add_rustc_lib_path` to take `Command` instead of `Cargo` to try to share the code in several places. This is how it worked before https://github.com/rust-lang/rust/pull/64316, and I think this still retains the spirit of that change.
Fixes#76702
improve const infer error
cc #72328
reduces it from
```
error[E0282]: type annotations needed
--> src/main.rs:17:5
|
17 | Foo.bar().bar().bar().bar().baz();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: unable to infer the value of a const parameter
```
to
```
error[E0282]: type annotations needed
--> $DIR/method-chain.rs:21:33
|
LL | Foo.bar().bar().bar().bar().baz();
| ^^^
|
= note: cannot infer the value of the const parameter `N`
```
r? @varkor
fix syntax error in suggesting generic constraint in trait parameter
suggest `where T: Foo` for the first bound on a trait, then suggest
`, T: Foo` when the suggested bound would add to an existing set of
`where` clauses. `where T: Foo` may be the first bound if `T` has a
default, because we'd rather suggest
```
trait A<T=()> where T: Copy
```
than
```
trait A<T: Copy=()>
```
for legibility reasons.
the test case i added here is derived from [this reproduction](https://play.rust-lang.org/?version=nightly&mode=debug&edition=2018&gist=0bf3ace9f2a183d0bdbd748c6b8e3971):
```
struct B<T: Copy> {
t: T
}
trait A<T = ()> {
fn returns_constrained_type(&self, t: T) -> B<T> {
B { t }
}
}
```
where the suggested fix,
```
trait A<T = ()>, T: Copy { ... }
```
is in fact invalid syntax!
i also found an error in the existing suggestion for `trait Base<T = String>: Super<T>` where rustc would suggest `trait Base<T = String>: Super<T>, T: Copy`, but `T: Copy` is the first of the trait's `where` clauses and should be `where T: Copy` as well. the test for that suggestion expects invalid syntax, and has been revised to a compiler-pleasing `trait Base<T = String>: Super<T> where T: Copy`.
judging by https://github.com/rust-lang/rust/pull/70009 i'll.. cc @estebank ?
Rollup of 10 pull requests
Successful merges:
- #76056 (Add more info for Vec Drain doc)
- #76062 (Vec slice example fix style and show type elision)
- #76262 (Use inline(never) instead of cold)
- #76335 (Make all methods of `Duration` unstably const)
- #76366 (Add Arith Tests in Library)
- #76369 (Move Various str tests in library)
- #76534 (Add doc comments for From impls)
- #76622 (Update bootstrap readme)
- #76641 (Some cleanup changes and commenting)
- #76662 (Fix liballoc test suite for Miri)
Failed merges:
r? `@ghost`
Update bootstrap readme
- Reflect changes in x.py defaults
- Remove recommendation to use nightly for incremental; it works fine on
beta
- Remove note that incremental chooses stage 1 by default; stage 1 is
already the default
- Update Discord -> Zulip
r? @Mark-Simulacrum
Make all methods of `Duration` unstably const
Make the following methods of `Duration` unstable const under `duration_const_2`:
- `from_secs_f64`
- `from_secs_f32`
- `mul_f64`
- `mul_f32`
- `div_f64`
- `div_f32`
This results in all methods of `Duration` being (unstable) const.
Moved the tests to `library` as part of #76268.
Possible because of #72449, which made the relevant `f32` and `f64` methods const.
Tracking issue: #72440
r? @ecstatic-morse
