This reduces the amount of LLVM IR rustc generates for basically every
use of `fmt::Pointer` by several hundred lines per pointee type. Most of
the gain is from side-stepping a code size issue with the current
implementation of `Formatter::with_field`. But even if those were fixed,
it would still be an improvement:

* The "is it a thin pointer?" check can't be eliminated during codegen,
  so rustc codegens *both* branches for every pointer type and LLVM has
  to clean it up later.
* For wide pointers, the use of `DebugStruct` isn't a *lot* of code, but
  it's still a bit of extra code per wide pointer type that can easily
  be shared across all wide pointer types.

…on PhantomPinned

Same as 147495, just keeping it up-to-date.

Improve polymorphization of raw pointer formatting

This reduces the amount of LLVM IR rustc generates for basically every use of `fmt::Pointer` by several hundred lines per pointee type. Most of the gain is from side-stepping a code size issue with the current implementation of `Formatter::with_field`. But even if those were fixed, it would still be an improvement:

* The "is it a thin pointer?" check can't be eliminated during codegen, so rustc codegens *both* branches for every pointer type and LLVM has to clean it up later.
* For wide pointers, the use of `DebugStruct` isn't a *lot* of code, but it's still a bit of extra code per wide pointer type that can easily be shared across all wide pointer types.

remove AliasTerm::def_id()

this is part of rust-lang#156181

as well as part of rust-lang#152245

fyi @lcnr

r? @BoxyUwU

…oxyUwU

Remove AnonConstKind::GCA and reject generic anon consts

Previously, a `GCA` type const (`type const FOO<const N: usize>: usize = const { N + 1 };`) was a type-system-transparent type const whose body immediately thunked out to an opaque regular const (albeit an anon const). The fact that there was a transparent wrapper wasn't providing anything of value, now that the user can write and rust-lang#155341.

With this PR, `GCA` variant is removed from `AnonConstKind` so that generic anon consts are rejected.

Related: rust-lang/project-const-generics#113

…ggestion, r=mu001999

Avoid ICE in unconstrained generic parameter suggestion for enums

Fixes rust-lang#156701

`remove_or_use_generic` accepted structs, enums, and unions as ADT self types, but later used a local HIR lookup with `expect_struct()` when building the type-definition suggestion. That caused an ICE when the self type was an enum.

…c-improvements, r=folkertdev

note which target a missing target_feature belongs to

This PR attempts to improve diagnostics for invalid `target_feature` error, many years ago I experienced that [error](rust-lang#108680 (comment))

Closes: rust-lang#109531

…span, r=lolbinarycat

rustdoc: correct doctest span for trailing semicolon after item

Fixes rust-lang#157371.

When a doctest contains a trailing semicolon after an item, rustdoc can map the
resulting warning to unrelated source following the documentation block rather
than to the semicolon inside the doctest.

Changes only diagnostic span reporting.

…, r=BoxyUwU,samueltardieu

Added `PhantomPinned` diagnostic item and prevented dead field warning on `PhantomPinned`

This PR closes rust-lang#154888. See rust-lang#154978 and in [clippy#17056](rust-lang/rust-clippy#17056) for prior history on working on this issue.

From discussing with clippy team, we thought it'd be appropriate to use a diagnostic item attribute to mark `PhantomPinned` and prevent dead field warnings from being emitted in `missing_fields_in_debug.rs` and `pub_underscore_fields.rs`.

If you want me to do the clippy changes separately within the clippy repository, I can do that.

…mejrs,wesleywiser

Ensure that optimize attributes on closures are inherited by the shim.

Tracking issue: rust-lang#54882
Stabilization PR: rust-lang#157273

rustc_public: implement `ty::Alias` conversion

I don't know why there is a `todo!()` here. Am I overlooking anything?

…-ld, r=Mark-Simulacrum

Update wasm-component-ld to 0.5.25

Same as rust-lang#147495, just keeping it up-to-date.