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Rollup of 12 pull requests #127064

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@jhpratt jhpratt commented Jun 28, 2024

Successful merges:

r? @ghost
@rustbot modify labels: rollup

Create a similar rollup

jieyouxu and others added 30 commits April 17, 2024 19:23
- Syntax extensions are replaced by proc macros.
- Add rationale for why AST validation pass need to be run
  post-expansion and why the pass is needed in the first place.
Signed-off-by: onur-ozkan <work@onurozkan.dev>
Signed-off-by: onur-ozkan <work@onurozkan.dev>
Signed-off-by: onur-ozkan <work@onurozkan.dev>
Signed-off-by: onur-ozkan <work@onurozkan.dev>
`-Z patchable-function-entry` works like `-fpatchable-function-entry`
on clang/gcc. The arguments are total nop count and function offset.

See MCP rust-lang/compiler-team#704
See [RFC](https://github.com/maurer/rust-rfcs/blob/patchable-function-entry/text/0000-patchable-function-entry.md) (yet to be numbered)

TODO before submission:
* Needs an RFC
* Improve error reporting for malformed attributes
Removes an `unsafe` in favor of just using `String` methods.
as request T-lang is requesting some major changes in the lint inner
workings in rust-lang#126768#issuecomment-2192634762
These table entries have wrong number of columns so the "notes" field is
missing from the rendered page. Fix by removing excess empty columns.
Currently bootstrap doesn't use any inner paths from rust-analyzer and
bootstrap with `ShouldRun::create_or_deps`.

Signed-off-by: onur-ozkan <work@onurozkan.dev>
Add test for fn pointer duplication.

I managed to make it fail when removing provenance checks in GVN.

cc rust-lang#123670

r? ```@oli-obk```
…docs, r=wesleywiser

Update AST validation module docs

Drive-by doc update for AST validation pass:

- Syntax extensions are replaced by proc macros.
- Add rationale for why AST validation pass need to be run
  post-expansion and why the pass is needed in the first place.

This was discussed during this week's [rustc-dev-guide reading club](https://rust-lang.zulipchat.com/#narrow/stream/196385-t-compiler.2Fwg-rustc-dev-guide), and the rationale was explained by cc ```@bjorn3.```
…s-pr, r=estebank,workingjubilee

patchable-function-entry: Add unstable compiler flag and attribute

Tracking issue: rust-lang#123115

Add the -Z patchable-function-entry compiler flag and the #[patchable_function_entry(prefix_nops = m, entry_nops = n)] attribute.
Rebased and adjusted the canditate implementation to match changes in the RFC.
…e, r=Kobzol

make cargo submodule optional

Right now, we fetch the cargo submodule no matter what, even if the command we are running doesn't need it (e.g., `x build compiler library`). This PR changes that to only fetch the cargo submodule when it's necessary.

For more context, see the zulip thread: https://rust-lang.zulipchat.com/#narrow/stream/326414-t-infra.2Fbootstrap/topic/Why.20is.20cargo.20always.20checked.20out.3F
…ive, r=oli-obk

Add basic Serde serialization capabilities to Stable MIR

This PR adds basic Serde serialization capabilities to Stable MIR. It is intentionally minimal (just wrapping all stable MIR types with a Serde `derive`), so that any important design decisions can be discussed before going further. A simple test is included with this PR to validate that JSON can actually be emitted.

## Notes

When I wrapped the Stable MIR error types in `compiler/stable_mir/src/error.rs`, it caused test failures (though I'm not sure why) so I backed those out.

## Future Work

So, this PR will support serializing basic stable MIR, but it _does not_ support serializing interned values beneath `Ty`s and `AllocId`s, etc... My current thinking about how to handle this is as follows:

1.  Add new `visited_X` fields to the `Tables` struct for each interned category of interest.

2.  As serialization is occuring, serialize interned values as usual _and_ also record the interned value we referenced in `visited_X`.

    (Possibly) In addition, if an interned value recursively references other interned values, record those interned values as well.

3.  Teach the stable MIR `Context` how to access the `visited_X` values and expose them with wrappers in `stable_mir/src/lib.rs` to users (e.g. to serialize and/or further analyze them).

### Pros

This approach does not commit to any specific serialization format regarding interned values or other more complex cases, which avoids us locking into any behaviors that may not be desired long-term.

### Cons

The user will need to manually handle serializing interned values.

### Alternatives

1.  We can directly provide access to the underlying `Tables` maps for interned values; the disadvantage of this approach is that it either requires extra processing for users to filter out to only use the values that they need _or_ users may serialize extra values that they don't need. The advantage is that the implementation is even simpler. The other pros/cons are similar to the above.

2.  We can directly serialize interned values by expanding them in-place. The pro is that this may make some basic inputs easier to consume. However, the cons are that there will need to be special provisions for dealing with cyclical values on both the producer and consumer _and_ global values will possibly need to be de-duplicated on the consumer side.
… r=cuviper

Simplify `str::clone_into`

Removes an `unsafe` in favor of just using `String` methods.
…=notriddle

Update browser-ui-test version to `0.18.0`

Should help with rust-lang#126436.

r? ```@notriddle```
Switch back `non_local_definitions` lint to allow-by-default

This PR switch back (again) the `non_local_definitions` lint to allow-by-default as T-lang is requesting some (major) changes in the lint inner workings in rust-lang#126768 (comment).

This PR will need to be beta-backported, as the lint is currently warn-by-default in beta.
…r=lqd

Fix Markdown tables in platform-support.md

These table entries have wrong number of columns so the "notes" field is missing from the rendered page. Fix by removing excess empty columns.
… r=oli-obk

Enable const casting for `f16` and `f128`

I have an open PR to the Miri repo adding tests for this behavior rust-lang/miri#3688, but that unfortunately hits the ICE path here. The changes seem reasonably low risk that it might be okay to merge separately from the tests, and I tested the result locally against an older version of rust-lang/miri#3688.

Cc ```@RalfJung```
…liased-flags, r=Kobzol

Migrate `run-make/override-aliased-flags` to `rmake.rs`

Part of rust-lang#121876.

I voluntarily didn't use the helper methods to make it obvious what's tested.

r? `@jieyouxu`
…s, r=oli-obk

Tighten `fn_decl_span` for async blocks

Tightens the span of `async {}` blocks in diagnostics, and subsequently async closures and async fns, by actually setting the `fn_decl_span` correctly. This is kinda a follow-up on rust-lang#125078, but it fixes the problem in a more general way.

I think the diagnostics are significantly improved, since we no longer have a bunch of overlapping spans. I'll point out one caveat where I think the diagnostic may get a bit more confusing, but where I don't think it matters.

r? `@estebank` or `@oli-obk` or someone else on wg-diag or compiler i dont really care lol
@rustbot rustbot added A-run-make Area: port run-make Makefiles to rmake.rs A-testsuite Area: The testsuite used to check the correctness of rustc S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-infra Relevant to the infrastructure team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue. WG-trait-system-refactor The Rustc Trait System Refactor Initiative rollup A PR which is a rollup labels Jun 28, 2024
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jhpratt commented Jun 28, 2024

@bors r+ rollup=never p=12

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bors commented Jun 28, 2024

📌 Commit 863e408 has been approved by jhpratt

It is now in the queue for this repository.

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jun 28, 2024
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@jhpratt could #127010 have been what failed the rollup in #127056 (comment)? Doesn't seem like it should have but none of the other PRs from that rollup look like they touch that area. (unless it was the ssa changes somehow?)

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Nvm, guess it was spurious

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Yeah im wondering as well, I think the ui test update is the one looking most suspicious...
I'll rollup=never it

@jhpratt
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jhpratt commented Jun 28, 2024

It's rustdoc, so it's plausible. The version bump is apparently to reduce flakiness, but presumably there is still some.

I'll leave this rollup as-is. Feel free to do whatever you want if you feel strongly; I don't mind.

@jhpratt jhpratt deleted the rollup-kq9wipc branch June 28, 2024 00:38
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matthiaskrgr commented Jun 28, 2024

if its somehowe flaky we should probably still not roll it up so its easier to bisect to it later on in case it causes problems...
its already enough painful enough to deal with flaky things in CI that only somtimes break prs 😓

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jhpratt commented Jun 28, 2024

Doesn't bisection handle rollups nowadays?

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A-run-make Area: port run-make Makefiles to rmake.rs A-testsuite Area: The testsuite used to check the correctness of rustc rollup A PR which is a rollup S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-infra Relevant to the infrastructure team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue. WG-trait-system-refactor The Rustc Trait System Refactor Initiative
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