Commit graph

25028 commits

Author SHA1 Message Date
Matthias Krüger
6fcae0a83d
Rollup merge of #110563 - bryangarza:refactor-trait-selection-error-reporting, r=compiler-errors
Break up long function in trait selection error reporting + clean up nearby code

- Move blocks of code into their own functions
- Replace a few function argument types with their type aliases
- Create "AppendConstMessage" enum to replace a nested `Option`.
2023-04-25 06:46:48 +02:00
bors
8041917539 Auto merge of #110232 - Amanieu:old-llvm-components, r=petrochenkov
Allow older LLVM versions to have missing components

This check was introduced by #77280 to ensure that all tests that are filtered by LLVM component are actually tested in CI. However this causes issues for new targets (e.g. #101069) where support is only available on the latest LLVM version.

This PR restricts the tests to only CI jobs that use the latest LLVM version.
2023-04-25 02:09:27 +00:00
bors
69a4bcde41 Auto merge of #106152 - SUPERCILEX:lazycell, r=Amanieu
Add LazyCell::into_inner

This enables uses cases that need to extract the evaluated value and do something owned with it.
2023-04-24 23:47:32 +00:00
bors
627b7c4893 Auto merge of #110672 - Ezrashaw:allow-array-simd-in-inline-asm, r=workingjubilee
allow array-style simd in inline asm

Required for [MCP#621](https://github.com/rust-lang/compiler-team/issues/621) to be implemented.

r? `@workingjubilee`
2023-04-24 13:51:04 +00:00
bors
a982959eaf Auto merge of #110281 - ozkanonur:multiarch-compatible-sysroot-finding, r=jackh726
make sysroot finding compatible with multiarch systems

Tested on Debian 11 multiarch, worked just fine.

resolves #109994
2023-04-23 18:03:00 +00:00
bors
4691182f07 Auto merge of #108118 - oli-obk:lazy_typeck, r=cjgillot
Run various queries from other queries instead of explicitly in phases

These are just legacy leftovers from when rustc didn't have a query system. While there are more cleanups of this sort that can be done here, I want to land them in smaller steps.

This phased order of query invocations was already a lie, as any query that looks at types (e.g. the wf checks run before) can invoke e.g. const eval which invokes borrowck, which invokes typeck, ...
2023-04-23 13:34:31 +00:00
bors
01b668c1e4 Auto merge of #110497 - cjgillot:span-ctxt, r=b-naber
Refactor `SyntaxContext::ctxt` logic.

I'm still trying to make a test from the issue.

cc `@deepink-mas` does this solve the issue?

Fixes https://github.com/rust-lang/rust/issues/110230
2023-04-23 09:13:33 +00:00
bors
defeba50e5 Auto merge of #110655 - ChrisDenton:read-to-end, r=joshtriplett
Limit read size in `File::read_to_end` loop

Fixes #110650.

Windows file reads have perf overhead that's proportional to the buffer size. When we have a reasonable expectation that we know the file size, we can set a reasonable upper bound for the size of the buffer in one read call.
2023-04-23 06:58:28 +00:00
bors
0fd5915b76 Auto merge of #110523 - ecnelises:llvm_isa_fix, r=cuviper
Replace LLVM any_isa with any_cast

Per 585a6eb3eb/llvm/include/llvm/ADT/Any.h (L130) , `any_isa` has been deprecated in LLVM. Use `any_cast` instead to avoid warnings.
2023-04-22 20:03:44 +00:00
bors
db43375841 Auto merge of #110674 - compiler-errors:expect-projection-term-eq-succeeds, r=BoxyUwU
Expect that equating a projection term always succeeds in new solver

These should never fail. If they do, we have a problem with the logic that replaces a projection goal's term with an unconstrained infer var. Let's make sure we ICE in that case.
2023-04-22 17:59:16 +00:00
bors
497fc37cb1 Auto merge of #109753 - compiler-errors:replenish-region-constraints, r=aliemjay
Clone region var origins instead of taking them in borrowck

Fixes an issue with the new solver where reporting a borrow-checker error ICEs because it calls `InferCtxt::evaluate_obligation`.

This also removes a handful of unnecessary `tcx.infer_ctxt().build()` calls that are only there to mitigate this same exact issue, but with the old solver.

Fixes compiler-errors/next-solver-hir-issues#12.

----

This implements `@aliemjay's` solution where we just don't *take* the region constraints, but clone them. This potentially makes it easier to write a bug about taking region constraints twice or never at all, but again, not many folks are touching this code.
2023-04-22 15:15:51 +00:00
bors
353c2ddb13 Auto merge of #109507 - Amanieu:panic-oom-payload, r=davidtwco
Report allocation errors as panics

OOM is now reported as a panic but with a custom payload type (`AllocErrorPanicPayload`) which holds the layout that was passed to `handle_alloc_error`.

This should be review one commit at a time:
- The first commit adds `AllocErrorPanicPayload` and changes allocation errors to always be reported as panics.
- The second commit removes `#[alloc_error_handler]` and the `alloc_error_hook` API.

ACP: https://github.com/rust-lang/libs-team/issues/192

Closes #51540
Closes #51245
2023-04-22 12:27:45 +00:00
bors
6fd988bad3 Auto merge of #110567 - JohnBobbo96:monomorphize-dyn-dispatch, r=b-naber
Remove some uses of dynamic dispatch during monomorphization/partitioning.

This removes a few uses of dynamic dispatch and instead uses generics, as well as an enum to allow for other partitioning methods to be added later.
2023-04-22 07:43:43 +00:00
bors
6d4a39dc9e Auto merge of #106934 - DrMeepster:offset_of, r=WaffleLapkin
Add offset_of! macro (RFC 3308)

Implements https://github.com/rust-lang/rfcs/pull/3308 (tracking issue #106655) by adding the built in macro `core::mem::offset_of`. Two of the future possibilities are also implemented:

* Nested field accesses (without array indexing)
* DST support (for `Sized` fields)

I wrote this a few months ago, before the RFC merged. Now that it's merged, I decided to rebase and finish it.

cc `@thomcc` (RFC author)
2023-04-22 00:10:44 +00:00
bors
8a76857c06 Auto merge of #110569 - saethlin:mir-pass-cooperation, r=cjgillot
Deduplicate unreachable blocks, for real this time

In https://github.com/rust-lang/rust/pull/106428 (in particular 41eda69516) we noticed that inlining `unreachable_unchecked` can produce duplicate unreachable blocks. So we improved two MIR optimizations: `SimplifyCfg` was given a simplify to deduplicate unreachable blocks, then `InstCombine` was given a combiner to deduplicate switch targets that point at the same block. The problem is that change doesn't actually work.

Our current pass order is
```
SimplifyCfg (does nothing relevant to this situation)
Inline (produces multiple unreachable blocks)
InstCombine (doesn't do anything here, oops)
SimplifyCfg (produces the duplicate SwitchTargets that InstCombine is looking for)
```

So in here, I have factored out the specific function from `InstCombine` and placed it inside the simplify that produces the case it is looking for. This should ensure that it runs in the scenario it was designed for.

Fixes https://github.com/rust-lang/rust/issues/110551
r? `@cjgillot`
2023-04-21 15:08:02 +00:00
bors
f0605fa8d0 Auto merge of #110542 - petrochenkov:qcstore4, r=cjgillot
resolve: Remove `module_children_untracked`

One of the expensive spans in `ModChild` was removed in https://github.com/rust-lang/rust/pull/109772, so let's try again.
2023-04-21 12:57:31 +00:00
bors
6a0ddd34d4 Auto merge of #109002 - michaelvanstraten:master, r=petrochenkov
Added byte position range for `proc_macro::Span`

Currently, the [`Debug`](https://doc.rust-lang.org/beta/proc_macro/struct.Span.html#impl-Debug-for-Span) implementation for [`proc_macro::Span`](https://doc.rust-lang.org/beta/proc_macro/struct.Span.html#) calls the debug function implemented in the trait implementation of `server::Span` for the type `Rustc` in the `rustc-expand` crate.

The current implementation, of the referenced function, looks something like this:
```rust
fn debug(&mut self, span: Self::Span) -> String {
    if self.ecx.ecfg.span_debug {
        format!("{:?}", span)
    } else {
        format!("{:?} bytes({}..{})", span.ctxt(), span.lo().0, span.hi().0)
    }
}
```

It returns the byte position of the [`Span`](https://doc.rust-lang.org/beta/proc_macro/struct.Span.html#) as an interpolated string.

Because this is currently the only way to get a spans position in the file, I might lead someone, who is interested in this information, to parsing this interpolated string back into a range of bytes, which I think is a very non-rusty way.

The proposed `position()`, method implemented in this PR, gives the ability to directly get this info.
It returns a [`std::ops::Range`](https://doc.rust-lang.org/std/ops/struct.Range.html#) wrapping the lowest and highest byte of the [`Span`](https://doc.rust-lang.org/beta/proc_macro/struct.Span.html#).

I put it behind the `proc_macro_span` feature flag because many of the other functions that have a similar footprint also are annotated with it, I don't actually know if this is right.

It would be great if somebody could take a look at this, thank you very much in advanced.
2023-04-21 10:47:27 +00:00
Amanieu d'Antras
b512c1c12c Remove #[alloc_error_handler] from the compiler and library 2023-04-16 08:35:50 -07:00
bors
c353ea0e93 Auto merge of #101959 - Xaeroxe:clamp-better-assert, r=ChrisDenton
Add better assert messages for f32/f64 clamps
2023-04-14 10:44:36 +00:00
bors
7b279a0e6f Auto merge of #105007 - dlaugt:solaris-fs-link, r=ChrisDenton
linkat() not available in the system headers of Solaris 10

I've installed rustup on x86_64-unknown-linux-gnu and would like to use the target sparcv9-sun-solaris. For this, I have built a gcc from the source code for cross-compiling to sparcv9-sun-solaris2.10 with system headers of Solaris 10.

With the following hello word example:
main.rs:
```rust
fn main() {
    println!("Hello, world!");
}
```
I had a compilation error:
```
$ rustc -v --target sparcv9-sun-solaris -C linker=/opt/cross-solaris/gcc730/bin/sparcv9-sun-solaris2.10-gcc main.rs
error: linking with `/opt/cross-solaris/gcc730/bin/sparcv9-sun-solaris2.10-gcc` failed: exit status: 1
  |
  = note: "/opt/cross-solaris/gcc730/bin/sparcv9-sun-solaris2.10-gcc" "-m64" "/tmp/rustcgebYgj/symbols.o" "main.main.89363361-cgu.0.rcgu.o" "main.main.89363361-cgu.1.rcgu.o" "main.main.89363361-cgu.2.rcgu.o" "main.main.89363361-cgu.3.rcgu.o" "main.main.89363361-cgu.4.rcgu.o" "main.main.89363361-cgu.5.rcgu.o" "main.csypsau9u2r8348.rcgu.o" "-Wl,-z,ignore" "-L" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib" "-Wl,-Bstatic" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/libstd-fa47c8247d587714.rlib" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/libpanic_unwind-5c87bbe223e6c2a3.rlib" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/libobject-d484934062ff9fbb.rlib" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/libmemchr-e8dbd5835abcbf43.rlib" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/libaddr2line-909ad09329bde2f9.rlib" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/libgimli-4d74a3be929697ac.rlib" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/librustc_demangle-47cbe1d7f7271ae1.rlib" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/libstd_detect-239fd2d25fb32a00.rlib" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/libhashbrown-c4a7ce45fb9dec19.rlib" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/libminiz_oxide-fa6bc3d9bfb4e402.rlib" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/libadler-419f5a82ddd339a3.rlib" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/librustc_std_workspace_alloc-7672b378962c11be.rlib" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/libunwind-0f9e07f0a032c000.rlib" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/libcfg_if-ede7757c356dfb28.rlib" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/liblibc-808d56fbc668148a.rlib" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/liballoc-784767fe059ad3fe.rlib" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/librustc_std_workspace_core-aa31d7ef0556bbe1.rlib" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/libcore-81d07df07db18847.rlib" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/libcompiler_builtins-313a510e63006db2.rlib" "-Wl,-Bdynamic" "-lsocket" "-lposix4" "-lpthread" "-lresolv" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lsendfile" "-llgrp" "-L" "/home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib" "-o" "main" "-nodefaultlibs"
  = note: /opt/cross-solaris/gcc730/lib/gcc/sparcv9-sun-solaris2.10/7.3.0/../../../../sparcv9-sun-solaris2.10/bin/ld: warning: -z ignore ignored.
          /home/dlaugt/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/sparcv9-sun-solaris/lib/libstd-fa47c8247d587714.rlib(std-fa47c8247d587714.std.5c42d2c1-cgu.0.rcgu.o): In function `std::sys::unix::fs:🔗:h3683dfbfbb4995cb':
          /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/sys/unix/fs.rs:1407: undefined reference to `linkat'
          collect2: error: ld returned 1 exit status

  = help: some `extern` functions couldn't be found; some native libraries may need to be installed or have their path specified
  = note: use the `-l` flag to specify native libraries to link
  = note: use the `cargo:rustc-link-lib` directive to specify the native libraries to link with Cargo (see https://doc.rust-lang.org/cargo/reference/build-scripts.html#cargorustc-link-libkindname)
```

linkat() is not available in the system headers of Solaris 10. The hello word example works fine when I build/use rust with this PR change.
2023-04-14 05:57:33 +00:00
bors
c26776513e Auto merge of #109162 - ozkanonur:extend_detect_src_and_out_test, r=jyn514
extend `detect_src_and_out` test

> I was thinking about the following cases when I wrote the comment in #109055
>
> 1. Running bootstrap from the source root.
> 2. Running from a subdirectory of the source root.
> 3. Running from outside the source root.
> 4. Running on a different machine from where bootstrap was compiled (which will be important > for #107812). You can mostly replicate this by renaming the source root so it no longer exists on disk.
> 5. Running with `--build-dir`.
> 6. Running with `$RUST_BOOTSTRAP_CONFIG` set in the environment and `build-dir` set in the file.

Tested all the topics mentioned above. All worked fine. The test is now also covers if build dir is manually specified in config.

r? `@jyn514`

helps #109120 partially
2023-04-06 21:18:49 +00:00
bors
451eafadf7 Auto merge of #108448 - ishitatsuyuki:binary-heap, r=Mark-Simulacrum
binary_heap: Optimize Extend implementation.

This PR makes the `Extend` implementation for `BinaryHeap` no longer rely on specialization, so that it always use the bulk rebuild optimization that was previously only available for the `Vec` specialization.
2023-04-03 10:30:20 +00:00
bors
9ecd59dc4f Auto merge of #108288 - ozkanonur:hotfix-90244, r=Mark-Simulacrum
fix `build --stage 2 compiler/rustc` panic

Skip assembling(which causes panic due to not found `.librustc.stamp` file) process
for stage3(since it has problems with sysroot) if full-bootstrap isn't used.

Resolves #90244
2023-04-03 04:54:02 +00:00
bors
31f31c9cad Auto merge of #109008 - clubby789:drop-elaborate-array, r=davidtwco
Drop array patterns using subslices

Fixes #109004
Drops contiguous subslices of an array when moving elements out with a pattern, which improves perf for large arrays
r? `@compiler-errors`
2023-04-02 12:17:52 +00:00
bors
dc50af0e76 Auto merge of #109224 - oli-obk:smir, r=pnkfelix
Stable MIR: Add basic MIR body datastructures

At this point it will panic on most useful MIR, but you can do basic assignments

r? `@pnkfelix`
2023-03-30 02:59:25 +00:00
bors
120177cc32 Auto merge of #107221 - kleisauke:getentropy-emscripten, r=ChrisDenton
Use `getentropy()` instead of `/dev/urandom` on Emscripten

`/dev/urandom` is usually available on Emscripten, except when using
the special `NODERAWFS` filesystem backend, which replaces all normal
filesystem access with direct Node.js operations.

Since this filesystem backend directly access the filesystem on the
OS, it is not recommended to depend on `/dev/urandom`, especially
when trying to run the Wasm binary on OSes that are not Unix-based.

This can be considered a non-functional change, since Emscripten
implements `/dev/urandom` in the same way as `getentropy()` when not
linking with `-sNODERAWFS`.
2023-03-30 00:25:41 +00:00
bors
8adaa7f471 Auto merge of #108996 - pnkfelix:rollback-part-of-pr-104137-that-broke-wasm-linker-overriding, r=petrochenkov
Rollback part of pr 104137 that broke wasm linker overriding

This is a quick fix to address #108910
2023-03-29 19:18:46 +00:00
bors
59b8c7cde2 Auto merge of #108095 - soc:drop-contains, r=Amanieu
Drop unstable `Option::contains`, `Result::contains`, `Result::contains_err`

This is a proposal to drop the three functions `Option::contains`, `Result::contains` and `Result::contains_err`.

The discovery of `Option::is_some_with`/`Result::is_ok_with`/`Result::is_err_with` in https://github.com/rust-lang/rust/pull/93051 obviates the need for these methods (non-stabilization tracked in https://github.com/rust-lang/rust/issues/62358).

An additional benefit of change is that it avoids spurious error messages in IDEs, when `contains` is supplied by a third-party library:
![option-result-unstable](https://user-images.githubusercontent.com/42493/219127961-13cb559e-6ee8-4449-8dc9-d28d07270ad5.png)
2023-03-28 23:20:30 +00:00
bors
d72a3f8eda Auto merge of #109091 - Nilstrieb:match-on-attr, r=cjgillot
Cleanup `codegen_fn_attrs`

The `match` control flow construct has been stable since 1.0, we should use it here.

Sorry for the hard to review diff, I did try to at least split it into two commits. But looking at before-after side-by-side (instead of whatever github is doing) is probably the easiest way to make sure that I didn't forget about anything.

On top of #109088, you can wait for that
2023-03-27 05:01:19 +00:00
bors
0aec910c9c Auto merge of #109357 - saethlin:inline-as-deref, r=thomcc
Add #[inline] to as_deref

While working on https://github.com/rust-lang/rust/pull/109247 I found an `as_deref` call in the compiler that should have been inlined. This fixes the missing inlining (but doesn't address the perf issues I was chasing).

r? `@thomcc`
2023-03-26 18:32:17 +00:00
bors
73632b3f95 Auto merge of #106428 - saethlin:inline-diverging-functions, r=cjgillot
Permit the MIR inliner to inline diverging functions

This heuristic prevents inlining of `hint::unreachable_unchecked`, which in turn makes `Option/Result::unwrap_unchecked` a bad inlining candidate. I looked through the changes to `core`, `alloc`, `std`, and `hashbrown` by hand and they all seem reasonable. Let's see how this looks in perf...

---

Based on rustc-perf it looks like this regresses ctfe-stress, and the cachegrind diff indicates that this regression is in `InterpCx::statement`. I don't know how to do any deeper analysis because that function is _enormous_ in the try toolchain, which has no debuginfo in it. And a local build produces significantly different codegen for that function, even with LTO.
2023-03-26 05:55:32 +00:00
bors
d5b27e407f Auto merge of #105096 - LegionMammal978:copied-allocators, r=Amanieu
Clarify that copied allocators must behave the same

Currently, the safety documentation for `Allocator` says that a cloned or moved allocator must behave the same as the original. However, it does not specify that a copied allocator must behave the same, and it's possible to construct an allocator that permits being moved or cloned, but sometimes produces a new allocator when copied.

<details>
<summary>Contrived example which results in a Miri error</summary>

```rust
#![feature(allocator_api, once_cell, strict_provenance)]
use std::{
    alloc::{AllocError, Allocator, Global, Layout},
    collections::HashMap,
    hint,
    marker::PhantomPinned,
    num::NonZeroUsize,
    pin::Pin,
    ptr::{addr_of, NonNull},
    sync::{LazyLock, Mutex},
};

mod source_allocator {
    use super::*;

    // `SourceAllocator` has 3 states:
    // - invalid value: is_cloned == false, source != self.addr()
    // - source value:  is_cloned == false, source == self.addr()
    // - cloned value:  is_cloned == true
    pub struct SourceAllocator {
        is_cloned: bool,
        source: usize,
        _pin: PhantomPinned,
    }

    impl SourceAllocator {
        // Returns a pinned source value (pointing to itself).
        pub fn new_source() -> Pin<Box<Self>> {
            let mut b = Box::new(Self {
                is_cloned: false,
                source: 0,
                _pin: PhantomPinned,
            });
            b.source = b.addr();
            Box::into_pin(b)
        }

        fn addr(&self) -> usize {
            addr_of!(*self).addr()
        }

        // Invalid values point to source 0.
        // Source values point to themselves.
        // Cloned values point to their corresponding source.
        fn source(&self) -> usize {
            if self.is_cloned || self.addr() == self.source {
                self.source
            } else {
                0
            }
        }
    }

    // Copying an invalid value produces an invalid value.
    // Copying a source value produces an invalid value.
    // Copying a cloned value produces a cloned value with the same source.
    impl Copy for SourceAllocator {}

    // Cloning an invalid value produces an invalid value.
    // Cloning a source value produces a cloned value with that source.
    // Cloning a cloned value produces a cloned value with the same source.
    impl Clone for SourceAllocator {
        fn clone(&self) -> Self {
            if self.is_cloned || self.addr() != self.source {
                *self
            } else {
                Self {
                    is_cloned: true,
                    source: self.source,
                    _pin: PhantomPinned,
                }
            }
        }
    }

    static SOURCE_MAP: LazyLock<Mutex<HashMap<NonZeroUsize, usize>>> =
        LazyLock::new(Default::default);

    // SAFETY: Wraps `Global`'s methods with additional tracking.
    // All invalid values share blocks with each other.
    // Each source value shares blocks with all cloned values pointing to it.
    // Cloning an allocator always produces a compatible allocator:
    // - Cloning an invalid value produces another invalid value.
    // - Cloning a source value produces a cloned value pointing to it.
    // - Cloning a cloned value produces another cloned value with the same source.
    // Moving an allocator always produces a compatible allocator:
    // - Invalid values remain invalid when moved.
    // - Source values cannot be moved, since they are always pinned to the heap.
    // - Cloned values keep the same source when moved.
    unsafe impl Allocator for SourceAllocator {
        fn allocate(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError> {
            let mut map = SOURCE_MAP.lock().unwrap();
            let block = Global.allocate(layout)?;
            let block_addr = block.cast::<u8>().addr();
            map.insert(block_addr, self.source());
            Ok(block)
        }

        unsafe fn deallocate(&self, block: NonNull<u8>, layout: Layout) {
            let mut map = SOURCE_MAP.lock().unwrap();
            let block_addr = block.addr();
            // SAFETY: `block` came from an allocator that shares blocks with this allocator.
            if map.remove(&block_addr) != Some(self.source()) {
                hint::unreachable_unchecked()
            }
            Global.deallocate(block, layout)
        }
    }
}
use source_allocator::SourceAllocator;

// SAFETY: `alloc1` and `alloc2` must share blocks.
unsafe fn test_same(alloc1: &SourceAllocator, alloc2: &SourceAllocator) {
    let ptr = alloc1.allocate(Layout:🆕:<i32>()).unwrap();
    alloc2.deallocate(ptr.cast(), Layout:🆕:<i32>());
}

fn main() {
    let orig = &*SourceAllocator::new_source();
    let orig_cloned1 = &orig.clone();
    let orig_cloned2 = &orig.clone();
    let copied = &{ *orig };
    let copied_cloned1 = &copied.clone();
    let copied_cloned2 = &copied.clone();
    unsafe {
        test_same(orig, orig_cloned1);
        test_same(orig_cloned1, orig_cloned2);
        test_same(copied, copied_cloned1);
        test_same(copied_cloned1, copied_cloned2);
        test_same(orig, copied); // error
    }
}
```
</details>

This could result in issues in the future for algorithms that specialize on `Copy` types. Right now, nothing in the standard library that depends on `Allocator + Clone` is susceptible to this issue, but I still think it would make sense to specify that copying an allocator is always as valid as cloning it.
2023-03-26 01:21:12 +00:00
bors
90852f6d58 Auto merge of #99929 - the8472:default-iters, r=scottmcm
Implement Default for some alloc/core iterators

Add `Default` impls to the following collection iterators:

* slice::{Iter, IterMut}
* binary_heap::IntoIter
* btree::map::{Iter, IterMut, Keys, Values, Range, IntoIter, IntoKeys, IntoValues}
* btree::set::{Iter, IntoIter, Range}
* linked_list::IntoIter
* vec::IntoIter

and these adapters:

* adapters::{Chain, Cloned, Copied, Rev, Enumerate, Flatten, Fuse, Rev}

For iterators which are generic over allocators it only implements it for the global allocator because we can't conjure an allocator from nothing or would have to turn the allocator field into an `Option` just for this change.

These changes will be insta-stable.

ACP: https://github.com/rust-lang/libs-team/issues/77
2023-03-25 06:29:46 +00:00
bors
3d472f586d Auto merge of #109220 - nikic:poison, r=cuviper
Use poison instead of undef

In cases where it is legal, we should prefer poison values over undef values.

This replaces undef with poison for aggregate construction and for uninhabited types. There are more places where we can likely use poison, but I wanted to stay conservative to start with.

In particular the aggregate case is important for newer LLVM versions, which are not able to handle an undef base value during early optimization due to poison-propagation concerns.

r? `@cuviper`
2023-03-24 15:39:40 +00:00
bors
12a3b3dbfd Auto merge of #109216 - martingms:unicode-case-lut-shrink, r=Mark-Simulacrum
Shrink unicode case-mapping LUTs by 24k

I was looking into the binary bloat of a small program using `str::to_lowercase` and `str::to_uppercase`, and noticed that the lookup tables used for case mapping had a lot of zero-bytes in them. The reason for this is that since some characters map to up to three other characters when lower or uppercased, the LUTs store a `[char; 3]` for each character. However, the vast majority of cases only map to a single new character, in other words most of the entries are e.g. `(lowerc, [upperc, '\0', '\0'])`.
This PR introduces a new encoding scheme for these tables.

The changes reduces the size of my test binary by about 24K.

I've also done some `#[bench]`marks on unicode-heavy test data, and found that the performance of both `str::to_lowercase` and `str::to_uppercase` improves by up to 20%. These measurements are obviously very dependent on the character distribution of the data.

Someone else will have to decide whether this more complex scheme is worth it or not, I was just goofing around a bit and here's what came out of it 🤷‍♂️ No hard feelings if this isn't wanted!
2023-03-24 10:33:42 +00:00
bors
2170adcf31 Auto merge of #109172 - scottmcm:move-codegen-issues-tests, r=WaffleLapkin
mv tests/codegen/issue-* tests/codegen/issues/

No changes to the contents; just a move.

Like how there's a <https://github.com/rust-lang/rust/tree/master/tests/ui/issues> folder.
2023-03-23 04:11:47 +00:00
bors
731bac0b92 Auto merge of #109163 - hi-rustin:rustin-patch-dockerfile, r=Mark-Simulacrum
Add RANLIB_x86_64_unknown_illumos env for dist-x86_64-illumos dockerfile

close https://github.com/rust-lang/cc-rs/issues/798

We already set `AR_x86_64_unknown_illumos` in the dockerfile. So it is reasonable to set the `RANLIB_x86_64_unknown_illumos`.
2023-03-22 11:45:52 +00:00
bors
71a5eb5998 Auto merge of #109073 - michaelwoerister:limit-mingw-llvm-link-jobs, r=Mark-Simulacrum
Limit the number of parallel link jobs during LLVM build for mingw.

This PR is an attempt to unblock https://github.com/rust-lang/rust/pull/108355, which keeps failing while trying to link various LLVM artifacts on mingw runners. It looks like doing too many linking jobs might put too much load on the system? (Although I don't understand why the jobs are only failing for #108355 while they seem to pass for others)

r? infra-ci
2023-03-22 09:15:00 +00:00
bors
b0e55c6ce9 Auto merge of #109087 - cjgillot:sparse-bb-clear, r=davidtwco
Only clear written-to locals in ConstProp

This aims to revert the regression in https://github.com/rust-lang/rust/pull/108872

Clearing all locals at the end of each bb is very costly.
This PR goes back to the original implementation of recording which locals are modified.
2023-03-22 02:49:04 +00:00
bors
be7fae2f63 Auto merge of #108659 - ferrocene:pa-test-metrics, r=Mark-Simulacrum
Include executed tests in the build metrics (and use a custom test display impl)

The main goal of this PR is to include all tests executed in CI inside the build metrics JSON files. I need this for Ferrocene, and `@Mark-Simulacrum` expressed desire to have this as well to ensure all tests are executed at least once somewhere in CI.

Unfortunately implementing this required rewriting inside of bootstrap all of the code to render the test output to console. libtest supports outputting JSON instead of raw text, which we can indeed use to populate the build metrics. Doing that suppresses the console output though, and compared to rustc and Cargo the console output is not included as a JSON field.

Because of that, this PR had to reimplement both the "pretty" format (one test per line, with `rust.verbose-tests = true`), and the "terse" format (the wall of dots, with `rust.verbose-tests = false`). The current implementation should have the exact same output as libtest, except for the benchmark output. libtest's benchmark output is broken in the "terse" format, so since that's our default I slightly improved how it's rendered.

Also, to bring parity with libtest I had to introduce support for coloring output from bootstrap, using the same dependencies `annotate-snippets` uses. It's now possible to use `builder.color_for_stdout(Color::Red, "text")` and `builder.color_for_stderr(Color::Green, "text")` across all of bootstrap, automatically respecting the `--color` flag and whether the stream is a terminal or not.

I recommend reviewing the PR commit-by-commit.
r? `@Mark-Simulacrum`
2023-03-21 14:33:14 +00:00
bors
9e43fa4752 Auto merge of #106967 - saethlin:remove-vec-as-ptr-assume, r=thomcc
Remove the assume(!is_null) from Vec::as_ptr

At a guess, this code is leftover from LLVM was worse at keeping track of the niche information here. In any case, we don't need this anymore: Removing this `assume` doesn't get rid of the `nonnull` attribute on the return type.
2023-03-21 08:44:17 +00:00
bors
454b15d31d Auto merge of #108717 - TDecki:dec2flt-inline, r=thomcc
Add inlining annotations in `dec2flt`.

Currently, the combination of `dec2flt` being generic and the `FromStr` implementaions
containing inline anttributes causes massive amounts of assembly to be generated whenever
these implementation are used. In addition, the assembly has calls to function which ought to
be inlined, but they are not (even when using lto).

This Pr fixes this.
2023-03-21 04:55:02 +00:00
bors
92fce37804 Auto merge of #108262 - ChrisDenton:libntdll, r=Mark-Simulacrum
Distribute libntdll.a with windows-gnu toolchains

This allows the OS loader to load essential functions (e.g. read/write file) at load time instead of lazily doing so at runtime.

r? libs
2023-03-21 02:23:27 +00:00
bors
211d008895 Auto merge of #109046 - Zoxc:split-execute-job, r=cjgillot,michaelwoerister
Split `execute_job` into `execute_job_incr` and `execute_job_non_incr`

`execute_job` was a bit large, so this splits it in 2. Performance was neutral locally, but this may affect bootstrap times.
2023-03-20 23:53:09 +00:00
bors
6c06eca732 Auto merge of #109384 - matthiaskrgr:rollup-hu348gs, r=matthiaskrgr
Rollup of 8 pull requests

Successful merges:

 - #109170 (Set `CMAKE_SYSTEM_NAME` for Linux targets)
 - #109266 (rustdoc: Correctly merge import's and its target's docs in one more case)
 - #109267 (Add tests for configure.py)
 - #109273 (Make `slice::is_sorted_by` implementation nicer)
 - #109277 (Fix generics_of for impl's RPITIT synthesized associated type)
 - #109307 (Ignore `Inlined` spans when computing caller location.)
 - #109364 (Only expect a GAT const param for `type_of` of GAT const arg)
 - #109365 (Update mdbook)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
2023-03-20 17:33:20 +00:00
bors
599c2f0aca Auto merge of #108524 - Zoxc:node-backtrace, r=cjgillot
Optimize dep node backtrace and ignore fatal errors

This attempts to optimize https://github.com/rust-lang/rust/pull/91742 while also passing through fatal errors.

r? `@cjgillot`
2023-03-20 11:54:00 +00:00
bors
9e8d89b441 Auto merge of #109377 - lnicola:rust-analyzer-2023-03-20, r=lnicola
⬆️ rust-analyzer

r? `@ghost`
2023-03-20 08:44:05 +00:00
Laurențiu Nicola
5c6f0a4b66 ⬆️ rust-analyzer 2023-03-20 08:31:01 +02:00
bors
825833c269 Auto merge of #14378 - lowr:patch/bump-chalk-0.89, r=lnicola
internal: Bump chalk

This release fixes a problem around GATs (rust-lang/chalk#790). While a regression test is added in chalk's own test suite, I also added one in ours so that we can catch regressions when we move away from chalk.

Fixes #14164
2023-03-19 08:11:09 +00:00
Ryo Yoshida
e12460bbca
Add regression test
so that we can catch regressions when we move away from chalk.
2023-03-19 16:58:10 +09:00