Fixes cases with custom libdir when it consists of two or more parts.

This commit extends existing logic for checking whether a closure that
is `FnOnce` and therefore moves variables that it captures from the
environment has already been invoked when being invoked again.

Now, this logic will also check whether the closure is being moved after
previously being moved or invoked and add an appropriate note.

The types are no longer used with the change to stacked borrows for
validation.

Those tests are directly taken from the comments on the bug reports.

When resolving Fn traits, the compiler failed to take into account
overloaded implementations.  To resolve this, we inform the trait dispatch
code that the arguments will becoming as a tuple of correct arity.

This allows to verify that we handle
different types as return types,
and that we call the expected functions.

This copies and adjusts the existing coherence tests to ensure that
they continue to work using the new implementation.

…ence.md

Co-Authored-By: weiznich <[email protected]>

uncoverd type

Implement compile tests as variants of existing tests

There are three problems with the nolink-with-link-args test:

* The test fails when using MSVC. It's caused by the `linker-flavor=ld` flag which was added in rust-lang#46291.
* In its comment, this test tests that "link_args are indeed passed when nolink is specified", but the `nolink` attribute has been removed [a long time ago](rust-lang#12826).
* Pattern has a small typo.

At first I was going to completely remove this test, but there is [a closed pull request for that](rust-lang#21090).

So:

* rename the file as suggested in the closed PR
* adjust the comment
* fix typo in the pattern
* add `ignore-msvc`.

Fixes rust-lang#57104.

Allow to dispatch fn traits depending on number of parameters

Hello,

By following @eddyb's advise on issue rust-lang#45510, I managed to have the snippets of code in rust-lang#45510 and rust-lang#18952 passing without breaking older diagnostics.

EDIT: the codegen tests breakage I experienced is due to the poor quality of my laptop.

If any kind reviewer has any advice, you are very welcome.

…nikomatsakis

Implement the Re-rebalance coherence RFC

This is the first time I touch anything in the compiler so just tell me if I got something wrong.

Big thanks to @sgrif for the pointers where to look for those things.
cc rust-lang#55437

Don't emit `Unevaluated` from `const_eval`

cc @eddyb @RalfJung

make `panictry!` private to libsyntax

This commit completely removes usage of the `panictry!` macro from
outside libsyntax. The macro causes parse errors to be fatal, so using
it in libsyntax_ext caused parse failures *within* a syntax extension to
be fatal, which is probably not intended.

Furthermore, this commit adds spans to diagnostics emitted by empty
extensions if they were missing, à la rust-lang#56491.

NLL: Add closure cannot be moved note.

Fixes rust-lang#57098.

This PR extends existing logic for checking whether a closure that
is `FnOnce` and therefore moves variables that it captures from the
environment has already been invoked when being invoked again.

Now, this logic will also check whether the closure is being moved after
previously being moved or invoked and add an appropriate note.

r? @pnkfelix

Search codegen backends based on target libdir instead of sysroot

Fixes rust-lang#57014

Fixes cases with custom libdir when it consists of two or more parts.

…excrichton

panic when calling MaybeUninhabited::into_inner on uninhabited type

I do this by adding an internal-only intrinsic `panic_if_uninhabited`. I have no idea what I am doing here, just mindlessly copying code around, so please review carefully!

…tsakis

Remove some unused code

Closes rust-lang#57096

…=alexcrichton

Rename and fix nolink-with-link-args test

There are three problems with the nolink-with-link-args test:

* The test fails when using MSVC. It's caused by the `linker-flavor=ld` flag which was added in rust-lang#46291.
* In its comment, this test tests that "link_args are indeed passed when nolink is specified", but the `nolink` attribute has been removed [a long time ago](rust-lang#12826).
* Pattern has a small typo.

At first I was going to completely remove this test, but there is [a closed pull request for that](rust-lang#21090).

So:

* rename the file as suggested in the closed PR
* adjust the comment
* fix typo in the pattern
* add `ignore-msvc`.

r? @alexcrichton

Fix backtraces for inlined functions on Windows

Fixes an regression introduced in rust-lang#50526

r? @alexcrichton

…=KodrAus

Fix broken links to second edition TRPL.

Fixes rust-lang#57104.

Remove `second-edition/` from TRPL hyperlinks.

Update reference of rlibc crate to compiler-builtins crate

None

src/jemalloc is gone, remove its mention from COPYRIGHT

The `src/jemalloc` submodule was removed in 61e8944 / rust-lang#55238.

Make sure feature gate errors are recoverable (take 2)

Continuation of rust-lang@15cefe4.
Turns out I missed the most important part - the main feature gate checking pass.

…matsakis

Update the stdsimd submodule

Add a new cmpxchg16b intrinsics for x86_64 and some corrections for ARM/AArch64

…s, r=alexcrichton

Update compiler_builtins 0.1.2 -> 0.1.3

r? @alexcrichton

Add Clippy to config.toml.example

Omitted in rust-lang#51122

The order is based on https://github.com/rust-lang/rust/blob/ec194646fef1a467073ad74b8b68f6f202cfce97/src/bootstrap/install.rs#L212

…atsakis

bootstrap: Link LLVM as a dylib with ThinLTO (take 2)

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]: rust-lang#53245 (comment)

---

This PR previously landed in rust-lang#56944, caused rust-lang#57111, and was reverted in rust-lang#57116. I've added one more commit here which should fix the breakage that we saw.

Fix 'be be' constructs

I noticed a duplicated "be" somewhere in the code. A search for it
manifested a couple more locations with the same problem. This change
removes one of the "be"s.