…-stack-sanitizer, r=tmandry

Unconditionally allow shadow call-stack sanitizer for AArch64

It is possible to do so whenever `-Z fixed-x18` is applied.

cc `@Darksonn` for context

The reasoning is that, as soon as reservation on `x18` is forced through the flag `fixed-x18`, on AArch64 the option to instrument with [Shadow Call Stack sanitizer](https://clang.llvm.org/docs/ShadowCallStack.html) is then applicable regardless of the target configuration.

At the every least, we would like to relax the restriction on specifically `aarch64-unknonw-none`. For this option, we can include a documentation change saying that users of compiled objects need to ensure that they are linked to runtime with Shadow Call Stack instrumentation support.

Related: rust-lang#121972

…llaumeGomez

Rollup of 8 pull requests

Successful merges:

 - rust-lang#128348 (Unconditionally allow shadow call-stack sanitizer for AArch64)
 - rust-lang#128922 (rust-analyzer: use in-tree `pattern_analysis` crate)
 - rust-lang#128935 (More work on `zstd` compression)
 - rust-lang#129072 (Infer async closure args from `Fn` bound even if there is no corresponding `Future` bound on return)
 - rust-lang#129101 (Fix projections when parent capture is by-ref but child capture is by-value in the `ByMoveBody` pass)
 - rust-lang#129106 (Remove redundant type ops: `Eq`/`Subtype`)
 - rust-lang#129122 (Remove duplicated `Rustdoc::output` method from `run-make-support` lib)
 - rust-lang#129124 (rustdoc-json: Use FxHashMap from rustdoc_json_types)

r? `@ghost`
`@rustbot` modify labels: rollup

…iaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#128348 (Unconditionally allow shadow call-stack sanitizer for AArch64)
 - rust-lang#129065 (Use `impl PartialEq<TokenKind> for Token` more.)
 - rust-lang#129072 (Infer async closure args from `Fn` bound even if there is no corresponding `Future` bound on return)
 - rust-lang#129096 (Print more verbose error for commands that capture output)
 - rust-lang#129101 (Fix projections when parent capture is by-ref but child capture is by-value in the `ByMoveBody` pass)
 - rust-lang#129106 (Remove redundant type ops: `Eq`/`Subtype`)
 - rust-lang#129122 (Remove duplicated `Rustdoc::output` method from `run-make-support` lib)
 - rust-lang#129124 (rustdoc-json: Use FxHashMap from rustdoc_json_types)

r? `@ghost`
`@rustbot` modify labels: rollup

Rollup merge of rust-lang#128348 - dingxiangfei2009:allow-shadow-call-stack-sanitizer, r=tmandry

Unconditionally allow shadow call-stack sanitizer for AArch64

It is possible to do so whenever `-Z fixed-x18` is applied.

cc ``@Darksonn`` for context

The reasoning is that, as soon as reservation on `x18` is forced through the flag `fixed-x18`, on AArch64 the option to instrument with [Shadow Call Stack sanitizer](https://clang.llvm.org/docs/ShadowCallStack.html) is then applicable regardless of the target configuration.

At the every least, we would like to relax the restriction on specifically `aarch64-unknonw-none`. For this option, we can include a documentation change saying that users of compiled objects need to ensure that they are linked to runtime with Shadow Call Stack instrumentation support.

Related: rust-lang#121972