Edit `rustc_mir_dataflow::framework::lattice::FlatSet` docs
Cosmetic improvements. Adds a paragraph break, and
ellipses to signify arbitrary size of a flat set.
Proper macOS libLLVM symlink when cross compiling
Follow up of #98418
When cross compiling on macOS with `llvm.link-shared` enabled, the symlink creation will fail after compiling LLVM for the target architecture, because it will attempt to create the symlink in the host LLVM directory, which was already created when being built.
This commit changes the symlink path to the actual LLVM output.
r? `@jyn514`
Fix repr(align) enum handling
`enum`, for better or worse, supports `repr(align)`. That has already caused a bug in https://github.com/rust-lang/rust/issues/92464, which was "fixed" in https://github.com/rust-lang/rust/pull/92932, but it turns out that that fix is wrong and caused https://github.com/rust-lang/rust/issues/96185.
So this reverts #92932 (which fixes#96185), and attempts another strategy for fixing #92464: special-case enums when doing a cast, re-using the code to load the discriminant rather than assuming that the enum has scalar layout. This works fine for the interpreter.
However, #92464 contained another testcase that was previously not in the test suite -- and after adding it, it ICEs again. This is not surprising; codegen needs the same patch that I did in the interpreter. Probably this has to happen [around here](d32ce37a17/compiler/rustc_codegen_ssa/src/mir/rvalue.rs (L276)). Unfortunately I don't know how to do that -- the interpreter can load a discriminant from an operand, but codegen can only do that from a place. `@oli-obk` `@eddyb` `@bjorn3` any idea?
bootstrap: Allow building individual crates
This aims to be as unintrusive as possible, but did still require adding a new `tail_args` field to all `Rustc` and `Std` steps.
New library and compiler crates are added to the sysroot as they are built, since it's useful to have e.g. just alloc and not std.
Fixes https://github.com/rust-lang/rust/issues/44293.
adapt issue-37945 codegen test to accept any order of ops
Adapt this test to accept `icmp` operands in any order as a follow-up to cbbf06b0cd (commitcomment-77670922).
bootstrap.py: Always use `.exe` for Windows
This ensures that it will run the Windows executable if other files in the directory (such as Linux executables) have the same file name minus the extension. I've been tripped up by this a few times where both `bootstrap` and `bootstrap.exe` end up in the same directory.
This PR avoids ever having to see the following message:
`OSError: [WinError 193] %1 is not a valid Win32 application`
Remove FIXME from rustdoc intra-doc test
Removed the FIXME.
For the `extern crate`, even if `pub` exported, its documentation wasn't rendered so there is no point in keeping it.
r? ``@notriddle``
rustdoc: improve click behavior of the source code mobile full-screen "sidebar"
On desktop, if you open the source code sidebar, it stays open even when you move from page to page. It used to do the same thing on mobile, but I think that's stupid. Since the file list fills the entire screen on mobile, and you can't really do anything with the currently selected file other than dismiss the "sidebar" to look at it, it's safe to assume that anybody who clicks a file in that list probably wants the list to go away so they can see it.
Split out separately from #98772
lints: mostly translatable diagnostics
As lints are created slightly differently than other diagnostics, intended to try make them translatable first and then look into the applicability of diagnostic structs but ended up just making most of the diagnostics in the crate translatable (which will still be useful if I do make a lot of them structs later anyway).
r? ``@compiler-errors``
ptr::copy and ptr::swap are doing untyped copies
The consensus in https://github.com/rust-lang/rust/issues/63159 seemed to be that these operations should be "untyped", i.e., they should treat the data as raw bytes, should work when these bytes violate the validity invariant of `T`, and should exactly preserve the initialization state of the bytes that are being copied. This is already somewhat implied by the description of "copying/swapping size*N bytes" (rather than "N instances of `T`").
The implementations mostly already work that way (well, for LLVM's intrinsics the documentation is not precise enough to say what exactly happens to poison, but if this ever gets clarified to something that would *not* perfectly preserve poison, then I strongly assume there will be some way to make a copy that *does* perfectly preserve poison). However, I had to adjust `swap_nonoverlapping`; after ``@scottmcm's`` [recent changes](https://github.com/rust-lang/rust/pull/94212), that one (sometimes) made a typed copy. (Note that `mem::swap`, which works on mutable references, is unchanged. It is documented as "swapping the values at two mutable locations", which to me strongly indicates that it is indeed typed. It is also safe and can rely on `&mut T` pointing to a valid `T` as part of its safety invariant.)
On top of adding a test (that will be run by Miri), this PR then also adjusts the documentation to indeed stably promise the untyped semantics. I assume this means the PR has to go through t-libs (and maybe t-lang?) FCP.
Fixes https://github.com/rust-lang/rust/issues/63159
Change enum->int casts to not go through MIR casts.
follow-up to https://github.com/rust-lang/rust/pull/96814
this simplifies all backends and even gives LLVM more information about the return value of `Rvalue::Discriminant`, enabling optimizations in more cases.
clean up the borrowing in rustc_hir_pretty
A whole lot of the `&`s and `ref`s were redundant. I hope doing this in one big commit is fine, because all of the changes are pretty self-contained.
`@rustbot` label: +C-cleanup
fix interpreter validity check on Box
Follow-up to https://github.com/rust-lang/rust/pull/98554: avoid walking over parts of the value twice.
And then move all that logic into the general visitor so not each visitor implementation has to deal with it...
Interpret: AllocRange Debug impl, and use it more consistently
The two commits are pretty independent but it did not seem worth having two PRs for them.
r? ``@oli-obk``
more `need_type_info` improvements
this now deals with macros in suggestions and the source cost computation does what I want for `channel` 🎉
r? ``@estebank``
Implement `FusedIterator` for `std::net::[Into]Incoming`
They never return `None`, so they trivially fulfill the contract.
What should I put for the stability attribute of `Incoming`?
Add method to mutate MIR body without invalidating CFG caches.
In addition to adding this method, a handful of passes are updated to use it. There's still quite a few passes that could in principle make use of this as well, but do not at the moment because they use `VisitorMut` or `MirPatch`, which needs additional support for this.
The method name is slightly unwieldy, but I don't expect anyone to be writing it a lot, and at least it says what it does. If anyone has a suggestion for a better name though, would be happy to rename.
r? rust-lang/mir-opt
incr.comp.: Make split-dwarf commandline options [TRACKED].
This commandline options have an influence on the contents of object files (and .dwo files), so they need to be `[TRACKED]`.
r? `@davidtwco`
rustdoc: Censor certain complex unevaluated const exprs
Fixes#97933.
This is more of a hotfix for the aforementioned issue. By that, I mean that my proposed patch is
not the best solution but one that does not change as much existing code.
It treats symptoms rather than the root cause.
This PR “censors” certain complex unevaluated constant expressions like `match`es, blocks, function calls, struct literals etc. by pretty-printing them as `_` / `{ _ }` (number and string literals, paths and `()` are still printed as one would expect).
Resorting to this placeholder is preferable to printing the full expression verbatim since
they can be quite large and verbose resulting in an unreadable mess in the generated documentation.
Further, mindlessly printing the const would leak private and `doc(hidden)` struct fields (#97933), at least in the current
stable & nightly implementations which rely on `span_to_snippet` (!) and `rustc_hir_pretty::id_to_string`.
The censoring of _verbose_ expressions is probably going to stay longer term.
However, in regards to private and `doc(hidden)` struct fields, I have a more proper fix in mind
which I have already partially implemented locally and for which I am going to open a separate PR sometime soon.
For that, I was already in contact with `@GuillaumeGomez.`
The proper fix involves rustdoc not falling back on pretty-printing unevaluated consts so easily (what this PR is concerned about)
and instead preferring to print evaluated consts which contain more information allowing it to selectively hide private and `doc(hidden)` fields, create hyperlinks etc. generally making the output more granular and precise (compared to the brutal `_` placeholder).
Unfortunately, I was a bit too late and the issue just hit stable (1.62).
Should this be backported to beta or even a potential 1.62.1?
r? `@GuillaumeGomez`
Lint against executable files in the root directory
This avoids accidental introduction (such as in #97488) of executable files into the root directory, not just under library/, src/ or compiler/.
Resolves#98792
