rustdoc: Only look at blanket impls in `get_blanket_impls`
The idea here is that all the work in 16156fb278/compiler/rustc_middle/src/ty/trait_def.rs (L172-L186) doesn't matter for `get_blanket_impls` - Rustdoc will already pick up on those blocks when it documents the item.
Run LLVM coverage instrumentation passes before optimization passes
This matches the behavior of Clang and allows us to remove several
hacks which were needed to ensure functions weren't optimized away
before reaching the instrumentation pass.
Fixes#83429
cc `@richkadel`
r? `@tmandry`
Rollup of 6 pull requests
Successful merges:
- #80720 (Make documentation of which items the prelude exports more readable.)
- #83654 (Do not emit a suggestion that causes the E0632 error)
- #83671 (Add a regression test for issue-75801)
- #83678 (Fix Self keyword doc URL conflict on case insensitive file systems (until definitely fixed on rustdoc))
- #83680 (Update for loop desugaring docs)
- #83683 (bootstrap: don't complain about linkcheck if it is excluded)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
bootstrap: don't complain about linkcheck if it is excluded
We don't need to complain to the user about linkcheck having different
hosts and targets when it is already excluded.
Resolves#83661
Disallow octal format in Ipv4 string
In its original specification, leading zero in Ipv4 string is interpreted
as octal literals. So a IP address 0127.0.0.1 actually means 87.0.0.1.
This confusion can lead to many security vulnerabilities. Therefore, in
[IETF RFC 6943], it suggests to disallow octal/hexadecimal format in Ipv4
string all together.
Existing implementation already disallows hexadecimal numbers. This commit
makes Parser reject octal numbers.
Fixes#83648.
[IETF RFC 6943]: https://tools.ietf.org/html/rfc6943#section-3.1.1
We don't need to complain to the user about linkcheck having different
hosts and targets when it is already excluded. This can be achieved by
moving the check to when the step is run instead of in should_run.
Improve pointer arithmetic docs
* Add slightly more detailed definition of "allocated object" to the module docs, and link it from everywhere.
* Clarify the "remains attached" wording a bit (at least I hope this is clearer).
* Remove the sentence about using integer arithmetic; this seems to confuse people even if it is technically correct.
As usual, the edit needs to be done in a dozen places to remain consistent, I hope I got them all.
Clean up Vec's benchmarks
The Vec benchmarks need a lot of love. I sort of noticed this in https://github.com/rust-lang/rust/pull/83357 but the overall situation is much less awesome than I thought at the time. The first commit just removes a lot of asserts and does a touch of other cleanup.
A number of these benchmarks are poorly-named. For example, `bench_map_fast` is not in fact fast, `bench_rev_1` and `bench_rev_2` are vague, `bench_in_place_zip_iter_mut` doesn't call `zip`, `bench_in_place*` don't do anything in-place... Should I fix these, or is there tooling that depend on the names not changing?
I've also noticed that `bench_rev_1` and `bench_rev_2` are remarkably fragile. It looks like poking other code in `Vec` can cause the codegen of this benchmark to switch to a version that has almost exactly half its current throughput and I have absolutely no idea why.
Here's the fast version:
```asm
0.69 │110: movdqu -0x20(%rbx,%rdx,4),%xmm0
1.76 │ movdqu -0x10(%rbx,%rdx,4),%xmm1
0.71 │ pshufd $0x1b,%xmm1,%xmm1
0.60 │ pshufd $0x1b,%xmm0,%xmm0
3.68 │ movdqu %xmm1,-0x30(%rcx)
14.36 │ movdqu %xmm0,-0x20(%rcx)
13.88 │ movdqu -0x40(%rbx,%rdx,4),%xmm0
6.64 │ movdqu -0x30(%rbx,%rdx,4),%xmm1
0.76 │ pshufd $0x1b,%xmm1,%xmm1
0.77 │ pshufd $0x1b,%xmm0,%xmm0
1.87 │ movdqu %xmm1,-0x10(%rcx)
13.01 │ movdqu %xmm0,(%rcx)
38.81 │ add $0x40,%rcx
0.92 │ add $0xfffffffffffffff0,%rdx
1.22 │ ↑ jne 110
```
And the slow one:
```asm
0.42 │9a880: movdqa %xmm2,%xmm1
4.03 │9a884: movq -0x8(%rbx,%rsi,4),%xmm4
8.49 │9a88a: pshufd $0xe1,%xmm4,%xmm4
2.58 │9a88f: movq -0x10(%rbx,%rsi,4),%xmm5
7.02 │9a895: pshufd $0xe1,%xmm5,%xmm5
4.79 │9a89a: punpcklqdq %xmm5,%xmm4
5.77 │9a89e: movdqu %xmm4,-0x18(%rdx)
15.74 │9a8a3: movq -0x18(%rbx,%rsi,4),%xmm4
3.91 │9a8a9: pshufd $0xe1,%xmm4,%xmm4
5.04 │9a8ae: movq -0x20(%rbx,%rsi,4),%xmm5
5.29 │9a8b4: pshufd $0xe1,%xmm5,%xmm5
4.60 │9a8b9: punpcklqdq %xmm5,%xmm4
9.81 │9a8bd: movdqu %xmm4,-0x8(%rdx)
11.05 │9a8c2: paddq %xmm3,%xmm0
0.86 │9a8c6: paddq %xmm3,%xmm2
5.89 │9a8ca: add $0x20,%rdx
0.12 │9a8ce: add $0xfffffffffffffff8,%rsi
1.16 │9a8d2: add $0x2,%rdi
2.96 │9a8d6: → jne 9a880 <<alloc::vec::Vec<T,A> as core::iter::traits::collect::Extend<&T>>::extend+0xd0>
```
Don't duplicate the extern providers once for each crate
This should give a small perf improvement for small crates by avoiding a memcpy of a pretty big struct for each loaded crate. In addition would be useful for replacing the sequential `CrateNum` everywhere with the hash based `StableCrateId` introduced in #81635, which would allow avoiding remapping of `CrateNum`'s when loading crate metadata. While this PR is not strictly needed for that, it is necessary to prevent a performance loss due to it.
I think this duplication was done in https://github.com/rust-lang/rust/pull/40008 (which introduced the query system) to make it possible to compile multiple crates in a single session in the future. I think this is unlikely to be implemented any time soon. In addition this PR can easily be reverted if necessary to implement this.
When the problem for a method not being found in its receiver is due to
arbitrary self-types, we don't want to mention importing or implementing
the trait, instead we suggest wrapping.
In its original specification, leading zero in Ipv4 string is interpreted
as octal literals. So a IP address 0127.0.0.1 actually means 87.0.0.1.
This confusion can lead to many security vulnerabilities. Therefore, in
[IETF RFC 6943], it suggests to disallow octal/hexadecimal format in Ipv4
string all together.
Existing implementation already disallows hexadecimal numbers. This commit
makes Parser reject octal numbers.
Fixes#83648.
[IETF RFC 6943]: https://tools.ietf.org/html/rfc6943#section-3.1.1
This matches the behavior of Clang and allows us to remove several
hacks which were needed to ensure functions weren't optimized away
before reaching the instrumentation pass.
