This commit reduces the size of `Statement` from 80 bytes to 56 bytes on
64-bit platforms, by boxing the `AscribeUserType` variant of
`StatementKind`.
This change reduces instruction counts on most benchmarks by 1--3%.
Rollup of 22 pull requests
Successful merges:
- #53507 (Add doc for impl From for Waker)
- #53931 (Gradually expanding libstd's keyword documentation)
- #54965 (update tcp stream documentation)
- #54977 (Accept `Option<Box<$t:ty>>` in macro argument)
- #55138 (in which unused-parens suggestions heed what the user actually wrote)
- #55173 (Suggest appropriate syntax on missing lifetime specifier in return type)
- #55200 (Documents `From` implementations for `Stdio`)
- #55245 (submodules: update clippy from 5afdf8b7 to b1d03437)
- #55247 (Clarified code example in char primitive doc)
- #55251 (Fix a typo in the documentation of RangeInclusive)
- #55253 (only issue "variant of the expected type" suggestion for enums)
- #55254 (Correct trailing ellipsis in name_from_pat)
- #55269 (fix typos in various places)
- #55282 (Remove redundant clone)
- #55285 (Do some copy editing on the release notes)
- #55291 (Update stdsimd submodule)
- #55296 (Set RUST_BACKTRACE=0 for rustdoc-ui/failed-doctest-output.rs)
- #55306 (Regression test for #54478.)
- #55328 (Fix doc for new copysign functions)
- #55340 (Operands no longer appear in places)
- #55345 (Remove is_null)
- #55348 (Update RELEASES.md after destabilization of non_modrs_mods)
Failed merges:
r? @ghost
Remove is_null
It was confusingly named (`is_zero` would have been better, as someone pointed out somewhere but I forgot who or where), and it didn't even reliably test for "is this value 0 at run-time" because out-of-bounds pointers *can* be 0.
It's not used in rustc, and miri only really needs `is_null_ptr` and `to_bytes() == 0`, so let's just kill this method.
r? @oli-obk
