…ew `parallel` submodule

…ed ty

To avoid confusion if it is called after all parsing is done or not.

Only deprecating it rather than making it private to just in case
someone has a use case for it.

It is only used by miri which can create a new one using the Session.

Closes rust-lang#108030.
This issue has been resolved in LLVM 17.

Extract parallel operations in `rustc_data_structures::sync` into a new `parallel` submodule

This extracts parallel operations in `rustc_data_structures::sync` into a new `parallel` submodule. This cuts down on the size of the large `cfg_if!` in `sync` and makes it easier to compare between serial and parallel variants.

Add regression test for LLVM 17-rc3 miscompile

Closes rust-lang#115385, see that issue for more details.

…davidtwco

Don't ICE when computing ctype's `repr_nullable_ptr` for possibly-unsized ty

We may not always be able to compute the layout of a type like `&T` when `T: ?Sized`, even if we're able to estimate its size skeleton.

r? davidtwco

Fixes rust-lang#115628

fix homogeneous_aggregate not ignoring some ZST

This is an ABI-breaking change, because it fixes bugs in our ABI code. I'm not sure what that means for this PR, we don't really have a process for such changes, do we? I can only hope nobody relied on the old buggy behavior.

Fixes rust-lang#115664

…mpiler-errors

Some more small driver refactors

To improve clarity and simplify some code.

…rors

Allow loading the SMIR for constants and statics

cc rust-lang/project-stable-mir#34

before this PR we were ICEing when trying to access the SMIR of anything other than functions

…sleywiser

Add a test for rust-lang#108030

Closes rust-lang#108030.

This issue has been resolved in LLVM 17. I can verify that this test fails on 63a81b0.

r? compiler

Update books

## rust-lang/edition-guide

1 commits in 2751bdcef125468ea2ee006c11992cd1405aebe5..34fca48ed284525b2f124bf93c51af36d6685492
2023-09-06 20:34:00 UTC to 2023-09-06 20:34:00 UTC

- Update Rust 2018 "Path and module system changes" for Rust 1.72 (rust-lang/edition-guide#285)

## rust-lang/nomicon

2 commits in 388750b081c0893c275044d37203f97709e058ba..e3f3af69dce71cd37a785bccb7e58449197d940c
2023-09-11 15:57:05 UTC to 2023-09-11 15:55:35 UTC

- specify which integer overflows we mean (rust-lang/nomicon#419)
- remove 'fail to call destructors' from okay-list (rust-lang/nomicon#420)

## rust-lang/reference

4 commits in d43038932adeb16ada80e206d4c073d851298101..ee7c676fd6e287459cb407337652412c990686c0
2023-09-09 20:08:06 UTC to 2023-08-16 16:59:33 UTC

- Specify bit validity and padding of some types (rust-lang/reference#1392)
- implementations.md typo fix (rust-lang/reference#1399)
- Update section on default layout for `repr(Rust)` (rust-lang/reference#1396)
- conditional-compilation.md: Mention the "none" target_os value (rust-lang/reference#1395)

## rust-lang/rust-by-example

4 commits in 07e0df2f006e59d171c6bf3cafa9d61dbeb520d8..c954202c1e1720cba5628f99543cc01188c7d6fc
2023-08-22 18:49:29 UTC to 2023-08-22 18:46:56 UTC

- Improve transparency of 5_i32 versus 5i32 (rust-lang/rust-by-example#1707)
- Removed redundant comma (rust-lang/rust-by-example#1735)
- Fixed link to Functions (rust-lang/rust-by-example#1734)
- Pedantic `'static` lifetime corrections (rust-lang/rust-by-example#1732)

## rust-lang/rustc-dev-guide

25 commits in b123ab4..08bb147
2023-09-11 10:36:36 UTC to 2023-08-18 21:13:31 UTC

- make link more pleasant to eye too (rust-lang/rustc-dev-guide#1778)
- The current playground link used in the page of MIR shows a optimized… (rust-lang/rustc-dev-guide#1789)
- Add section about building an optimized version of `rustc` (rust-lang/rustc-dev-guide#1787)
- Set max line length in `.editorconfig` to 100 (rust-lang/rustc-dev-guide#1788)
- Update minor how-to-build-and-run.md spelling mistake (rust-lang/rustc-dev-guide#1785)
- add sections in 'using git' (rust-lang#1675) (rust-lang/rustc-dev-guide#1784)
- link std-dev-guide from landing page (rust-lang#1699) (rust-lang/rustc-dev-guide#1783)
- Reword sentence about using `./x` over `./x.py` (rust-lang/rustc-dev-guide#1782)
- remove (excessive) indentation (rust-lang/rustc-dev-guide#1781)
- coverage tests have moved, twice (rust-lang/rustc-dev-guide#1780)
- remove extraneous word (rust-lang/rustc-dev-guide#1779)
- llvm updates (rust-lang/rustc-dev-guide#1761)
- make link more pleasant to eye (rust-lang/rustc-dev-guide#1777)
- date-check: test suites/classes using "revisions" (rust-lang/rustc-dev-guide#1738)
- share link target (rust-lang/rustc-dev-guide#1740)
- indicate full hierarchy of config option (rust-lang/rustc-dev-guide#1776)
- remove stray word (rust-lang/rustc-dev-guide#1773)
- it is lower-case (rust-lang/rustc-dev-guide#1772)
- Suggest enabling patch-binaries-for-nix in `shell.nix` (rust-lang/rustc-dev-guide#1774)
- Add additional licensing concerns to docs (rust-lang/rustc-dev-guide#1775)
- Fix broken MD link format (rust-lang/rustc-dev-guide#1771)
- update internal terminology: Substs -> GenericArgs (rust-lang/rustc-dev-guide#1769)
- Update suggested.md : missing word (rust-lang/rustc-dev-guide#1770)
- Update outdated doc for types (rust-lang/rustc-dev-guide#1768)
- Add dropck documentation (rust-lang/rustc-dev-guide#1767)