Update to LLVM 20 #135763

nikic · 2025-01-20T11:16:15Z

LLVM 20 GA is scheduled for March 11th. Rust 1.87 will be stable on May 15th.

Tested: host-x86_64, host-aarch64, apple, mingw, msvc

nikic · 2025-01-20T11:17:22Z

@bors try @rust-timer queue

bors · 2025-01-20T11:18:33Z

⌛ Trying commit fc35e8c with merge 79efb5f...

Update to LLVM 20 r? `@ghost`

bors · 2025-01-20T13:44:21Z

☀️ Try build successful - checks-actions
Build commit: 79efb5f (79efb5ff182537ce584a422f953ff24ab8f741db)

rust-timer · 2025-01-20T16:05:37Z

Finished benchmarking commit (79efb5f): comparison URL.

Overall result: ❌✅ regressions and improvements - please read the text below

Benchmarking this pull request likely means that it is perf-sensitive, so we're automatically marking it as not fit for rolling up. While you can manually mark this PR as fit for rollup, we strongly recommend not doing so since this PR may lead to changes in compiler perf.

Next Steps: If you can justify the regressions found in this try perf run, please indicate this with @rustbot label: +perf-regression-triaged along with sufficient written justification. If you cannot justify the regressions please fix the regressions and do another perf run. If the next run shows neutral or positive results, the label will be automatically removed.

@bors rollup=never
@rustbot label: -S-waiting-on-perf +perf-regression

Instruction count

This is the most reliable metric that we have; it was used to determine the overall result at the top of this comment. However, even this metric can sometimes exhibit noise.

	mean	range	count
Regressions ❌ (primary)	5.2%	[0.3%, 34.9%]	8
Regressions ❌ (secondary)	0.6%	[0.3%, 1.1%]	14
Improvements ✅ (primary)	-1.3%	[-4.2%, -0.2%]	250
Improvements ✅ (secondary)	-1.0%	[-5.0%, -0.2%]	192
All ❌✅ (primary)	-1.1%	[-4.2%, 34.9%]	258

Max RSS (memory usage)

Results (primary -1.5%, secondary -1.3%)

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	1.1%	[1.1%, 1.2%]	2
Regressions ❌ (secondary)	2.1%	[1.1%, 3.6%]	3
Improvements ✅ (primary)	-1.9%	[-3.8%, -1.0%]	11
Improvements ✅ (secondary)	-2.1%	[-3.4%, -0.9%]	13
All ❌✅ (primary)	-1.5%	[-3.8%, 1.2%]	13

Cycles

Results (primary -1.8%, secondary -5.0%)

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	39.1%	[39.1%, 39.1%]	1
Regressions ❌ (secondary)	3.6%	[3.6%, 3.6%]	1
Improvements ✅ (primary)	-2.4%	[-4.2%, -1.1%]	73
Improvements ✅ (secondary)	-5.2%	[-13.6%, -0.9%]	36
All ❌✅ (primary)	-1.8%	[-4.2%, 39.1%]	74

Binary size

Results (primary -1.2%, secondary -3.0%)

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	0.2%	[0.1%, 0.5%]	12
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-1.4%	[-7.1%, -0.0%]	96
Improvements ✅ (secondary)	-3.0%	[-7.2%, -0.1%]	90
All ❌✅ (primary)	-1.2%	[-7.1%, 0.5%]	108

Bootstrap: 765.63s -> 749.726s (-2.08%)
Artifact size: 326.02 MiB -> 335.29 MiB (2.85%)

nikic · 2025-01-27T16:18:17Z

The compiler-rt build (via compiler-builtins) for aarch64-unknown-uefi on test-various fails with:

warning: compiler_builtins@0.1.143: In file included from /checkout/src/llvm-project/compiler-rt/lib/builtins/cpu_model/aarch64.c:52:
warning: compiler_builtins@0.1.143: /checkout/src/llvm-project/compiler-rt/lib/builtins/cpu_model/aarch64/lse_atomics/windows.inc:2:10: fatal error: 'windows.h' file not found                                                                 
warning: compiler_builtins@0.1.143: #include <windows.h>
warning: compiler_builtins@0.1.143:          ^~~~~~~~~~~
warning: compiler_builtins@0.1.143: 1 error generated.
error: failed to run custom build command for `compiler_builtins v0.1.143`

The compilation command is:

  error occurred: Command "sccache" "clang-11" "-O3" "-ffunction-sections" "-fdata-sections" "--target=aarch64-unknown-windows-gnu" "-I" "/checkout/src/llvm-project/compiler-rt/lib/builtins" "-ffunction-sections" "-fdata-sections" "--target=aarch64-unknown-windows-gnu" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding" "-I/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/aarch64-unknown-uefi/release/build/compiler_builtins-de67acc96632c56e/out/include" "-fomit-frame-pointer" "-ffile-prefix-map=/checkout/src/llvm-project/compiler-rt=." "-DCOMPILER_RT_HAS_FLOAT16" "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-std/aarch64-unknown-uefi/release/build/compiler_builtins-de67acc96632c56e/out/670c1ed24249df13-aarch64.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/cpu_model/aarch64.c" with args clang-11 did not execute successfully (status code exit status: 1).

Related upstream change: llvm/llvm-project#116706

klensy · 2025-01-27T17:25:28Z

clang-11

What's wrong with version?

nikic · 2025-01-30T10:43:54Z

Testing host-aarch64.

@bors try

Update to LLVM 20 LLVM 20 GA is scheduled for March 11th. Rust 1.86 will be stable on April 3rd. * [x] rust-lang#135764 * [x] rust-lang#136134 * [x] rust-lang/compiler-builtins#752 * [ ] Update compiler-builtins Tested: arm-android, test-various, x86_64-rust-for-linux, x86_64-fuchsia, dist-various-1, dist-various-2, dist-s390x-linux, dist-riscv64-linux, dist-loongarch64-musl try-job: aarch64-gnu try-job: aarch64-gnu-debug try-job: dist-aarch64-linux

bors · 2025-01-30T10:45:06Z

⌛ Trying commit 881aa2d with merge 93cf5c1...

bors · 2025-01-30T14:02:32Z

☀️ Try build successful - checks-actions
Build commit: 93cf5c1 (93cf5c1ddb32e8f3a9fcdd8cd2cf78079ed6c78a)

nikic · 2025-01-30T14:11:49Z

Testing macos.

@bors try

Update to LLVM 20 LLVM 20 GA is scheduled for March 11th. Rust 1.86 will be stable on April 3rd. * [x] rust-lang#135764 * [x] rust-lang#136134 * [x] rust-lang/compiler-builtins#752 * [ ] Update compiler-builtins Tested: arm-android, test-various, x86_64-rust-for-linux, x86_64-fuchsia, dist-various-1, dist-various-2, dist-s390x-linux, dist-riscv64-linux, dist-loongarch64-musl try-job: dist-x86_64-apple try-job: dist-apple-various try-job: x86_64-apple-1 try-job: x86_64-apple-2 try-job: dist-aarch64-apple try-job: aarch64-apple

bors · 2025-01-30T14:12:59Z

⌛ Trying commit 881aa2d with merge 92ffaa8...

bors · 2025-01-30T18:08:52Z

☀️ Try build successful - checks-actions
Build commit: 92ffaa8 (92ffaa8cf69eca51dee2346f614ba8e990f37f34)

nikic · 2025-01-30T19:40:48Z

Testing mingw.

@bors try

bors · 2025-01-30T19:41:58Z

⌛ Trying commit 881aa2d with merge 6ff8ac7...

Update to LLVM 20 LLVM 20 GA is scheduled for March 11th. Rust 1.86 will be stable on April 3rd. * [x] rust-lang#135764 * [x] rust-lang#136134 * [x] rust-lang/compiler-builtins#752 * [ ] Update compiler-builtins Tested: arm-android, test-various, x86_64-rust-for-linux, x86_64-fuchsia, dist-various-1, dist-various-2, dist-s390x-linux, dist-riscv64-linux, dist-loongarch64-musl try-job: i686-mingw try-job: x86_64-mingw-1 try-job: x86_64-mingw-2 try-job: dist-i686-mingw try-job: dist-x86_64-mingw

nikic · 2025-02-17T13:29:26Z

Confirmed that the second variant works for both dist-loongarch64-linux and dist-loongarch64-musl.

@bors r=cuviper

bors · 2025-02-17T13:29:30Z

📌 Commit 1873bd3 has been approved by cuviper

It is now in the queue for this repository.

bors · 2025-02-17T14:19:36Z

⌛ Testing commit 1873bd3 with merge ce36a96...

bors · 2025-02-17T18:16:18Z

☀️ Test successful - checks-actions
Approved by: cuviper
Pushing ce36a96 to master...

rust-timer · 2025-02-17T19:32:38Z

Finished benchmarking commit (ce36a96): comparison URL.

Overall result: ❌✅ regressions and improvements - please read the text below

Our benchmarks found a performance regression caused by this PR.
This might be an actual regression, but it can also be just noise.

Next Steps:

If the regression was expected or you think it can be justified,
please write a comment with sufficient written justification, and add
@rustbot label: +perf-regression-triaged to it, to mark the regression as triaged.
If you think that you know of a way to resolve the regression, try to create
a new PR with a fix for the regression.
If you do not understand the regression or you think that it is just noise,
you can ask the @rust-lang/wg-compiler-performance working group for help (members of this group
were already notified of this PR).

@rustbot label: +perf-regression
cc @rust-lang/wg-compiler-performance

Instruction count

This is the most reliable metric that we have; it was used to determine the overall result at the top of this comment. However, even this metric can sometimes exhibit noise.

	mean	range	count
Regressions ❌ (primary)	5.1%	[0.2%, 35.1%]	8
Regressions ❌ (secondary)	0.7%	[0.4%, 1.0%]	10
Improvements ✅ (primary)	-1.3%	[-4.2%, -0.2%]	251
Improvements ✅ (secondary)	-1.0%	[-4.7%, -0.1%]	178
All ❌✅ (primary)	-1.1%	[-4.2%, 35.1%]	259

Max RSS (memory usage)

Results (primary 0.3%, secondary 2.9%)

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	1.8%	[1.0%, 2.4%]	6
Regressions ❌ (secondary)	2.9%	[2.0%, 4.2%]	11
Improvements ✅ (primary)	-1.5%	[-2.2%, -0.7%]	5
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	0.3%	[-2.2%, 2.4%]	11

Cycles

Results (primary -1.5%, secondary -5.2%)

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	21.2%	[2.7%, 39.7%]	2
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-2.1%	[-4.0%, -0.7%]	73
Improvements ✅ (secondary)	-5.2%	[-14.4%, -1.5%]	33
All ❌✅ (primary)	-1.5%	[-4.0%, 39.7%]	75

Binary size

Results (primary -1.3%, secondary -3.0%)

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	0.2%	[0.1%, 0.4%]	12
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-1.5%	[-7.2%, -0.0%]	93
Improvements ✅ (secondary)	-3.0%	[-7.3%, -0.0%]	92
All ❌✅ (primary)	-1.3%	[-7.2%, 0.4%]	105

Bootstrap: 787.551s -> 774.698s (-1.63%)
Artifact size: 350.23 MiB -> 362.37 MiB (3.47%)

Kobzol · 2025-02-18T08:54:36Z

Wins dominate the small regressions. The only large regression is on an opt incremental build, possibly a CGU got shuffled badly.

@rustbot label: +perf-regression-triaged

https://blog.rust-lang.org/2025/05/15/Rust-1.87.0/ * Switch to LLVM 20 rust-lang/rust#135763 * Moved `rust.description` to `build.description` rust-lang/rust#137723 * Mark extern block in unwind as unsafe rust-lang/rust@a4e7f8f

This MR contains the following updates: | Package | Update | Change | |---|---|---| | [rust](https://github.com/rust-lang/rust) | minor | `1.86.0` -> `1.87.0` | MR created with the help of [el-capitano/tools/renovate-bot](https://gitlab.com/el-capitano/tools/renovate-bot). **Proposed changes to behavior should be submitted there as MRs.** --- ### Release Notes <details> <summary>rust-lang/rust (rust)</summary> ### [`v1.87.0`](https://github.com/rust-lang/rust/blob/HEAD/RELEASES.md#Version-1870-2025-05-15) [Compare Source](rust-lang/rust@1.86.0...1.87.0) \========================== <a id="1.87.0-Language"></a> ## Language - [Stabilize `asm_goto` feature](rust-lang/rust#133870) - [Allow parsing open beginning ranges (`..EXPR`) after unary operators `!`, `-`, and `*`](rust-lang/rust#134900). - [Don't require method impls for methods with `Self: Sized` bounds in `impl`s for unsized types](rust-lang/rust#135480) - [Stabilize `feature(precise_capturing_in_traits)` allowing `use<...>` bounds on return position `impl Trait` in `trait`s](rust-lang/rust#138128) <a id="1.87.0-Compiler"></a> ## Compiler - [x86: make SSE2 required for i686 targets and use it to pass SIMD types](rust-lang/rust#135408) <a id="1.87.0-Platform-Support"></a> ## Platform Support - [Remove `i586-pc-windows-msvc` target](rust-lang/rust#137957) Refer to Rust's [platform support page][platform-support-doc] for more information on Rust's tiered platform support. [platform-support-doc]: https://doc.rust-lang.org/rustc/platform-support.html <a id="1.87.0-Libraries"></a> ## Libraries - [Stabilize the anonymous pipe API](rust-lang/rust#127154) - [Add support for unbounded left/right shift operations](rust-lang/rust#129375) - [Print pointer metadata in `Debug` impl of raw pointers](rust-lang/rust#135080) - [`Vec::with_capacity` guarantees it allocates with the amount requested, even if `Vec::capacity` returns a different number.](rust-lang/rust#135933) - Most `std::arch` intrinsics which don't take pointer arguments can now be called from safe code if the caller has the appropriate target features already enabled (rust-lang/stdarch#1714, rust-lang/stdarch#1716, rust-lang/stdarch#1717) - [Undeprecate `env::home_dir`](rust-lang/rust#137327) - [Denote `ControlFlow` as `#[must_use]`](rust-lang/rust#137449) - [Macros such as `assert_eq!` and `vec!` now support `const {...}` expressions](rust-lang/rust#138162) <a id="1.87.0-Stabilized-APIs"></a> ## Stabilized APIs - [`Vec::extract_if`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.extract_if) - [`vec::ExtractIf`](https://doc.rust-lang.org/stable/std/vec/struct.ExtractIf.html) - [`LinkedList::extract_if`](https://doc.rust-lang.org/stable/std/collections/struct.LinkedList.html#method.extract_if) - [`linked_list::ExtractIf`](https://doc.rust-lang.org/stable/std/collections/linked_list/struct.ExtractIf.html) - [`<[T]>::split_off`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off) - [`<[T]>::split_off_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_mut) - [`<[T]>::split_off_first`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_first) - [`<[T]>::split_off_first_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_first_mut) - [`<[T]>::split_off_last`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_last) - [`<[T]>::split_off_last_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.split_off_last_mut) - [`String::extend_from_within`](https://doc.rust-lang.org/stable/alloc/string/struct.String.html#method.extend_from_within) - [`os_str::Display`](https://doc.rust-lang.org/stable/std/ffi/os_str/struct.Display.html) - [`OsString::display`](https://doc.rust-lang.org/stable/std/ffi/struct.OsString.html#method.display) - [`OsStr::display`](https://doc.rust-lang.org/stable/std/ffi/struct.OsStr.html#method.display) - [`io::pipe`](https://doc.rust-lang.org/stable/std/io/fn.pipe.html) - [`io::PipeReader`](https://doc.rust-lang.org/stable/std/io/struct.PipeReader.html) - [`io::PipeWriter`](https://doc.rust-lang.org/stable/std/io/struct.PipeWriter.html) - [`impl From<PipeReader> for OwnedHandle`](https://doc.rust-lang.org/stable/std/os/windows/io/struct.OwnedHandle.html#impl-From%3CPipeReader%3E-for-OwnedHandle) - [`impl From<PipeWriter> for OwnedHandle`](https://doc.rust-lang.org/stable/std/os/windows/io/struct.OwnedHandle.html#impl-From%3CPipeWriter%3E-for-OwnedHandle) - [`impl From<PipeReader> for Stdio`](https://doc.rust-lang.org/stable/std/process/struct.Stdio.html) - [`impl From<PipeWriter> for Stdio`](https://doc.rust-lang.org/stable/std/process/struct.Stdio.html#impl-From%3CPipeWriter%3E-for-Stdio) - [`impl From<PipeReader> for OwnedFd`](https://doc.rust-lang.org/stable/std/os/fd/struct.OwnedFd.html#impl-From%3CPipeReader%3E-for-OwnedFd) - [`impl From<PipeWriter> for OwnedFd`](https://doc.rust-lang.org/stable/std/os/fd/struct.OwnedFd.html#impl-From%3CPipeWriter%3E-for-OwnedFd) - [`Box<MaybeUninit<T>>::write`](https://doc.rust-lang.org/stable/std/boxed/struct.Box.html#method.write) - [`impl TryFrom<Vec<u8>> for String`](https://doc.rust-lang.org/stable/std/string/struct.String.html#impl-TryFrom%3CVec%3Cu8%3E%3E-for-String) - [`<*const T>::offset_from_unsigned`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.offset_from_unsigned) - [`<*const T>::byte_offset_from_unsigned`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.byte_offset_from_unsigned) - [`<*mut T>::offset_from_unsigned`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.offset_from_unsigned-1) - [`<*mut T>::byte_offset_from_unsigned`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.byte_offset_from_unsigned-1) - [`NonNull::offset_from_unsigned`](https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.offset_from_unsigned) - [`NonNull::byte_offset_from_unsigned`](https://doc.rust-lang.org/stable/std/ptr/struct.NonNull.html#method.byte_offset_from_unsigned) - [`<uN>::cast_signed`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.cast_signed) - [`NonZero::<uN>::cast_signed`](https://doc.rust-lang.org/stable/std/num/struct.NonZero.html#method.cast_signed-5). - [`<iN>::cast_unsigned`](https://doc.rust-lang.org/stable/std/primitive.isize.html#method.cast_unsigned). - [`NonZero::<iN>::cast_unsigned`](https://doc.rust-lang.org/stable/std/num/struct.NonZero.html#method.cast_unsigned-5). - [`<uN>::is_multiple_of`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.is_multiple_of) - [`<uN>::unbounded_shl`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.unbounded_shl) - [`<uN>::unbounded_shr`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.unbounded_shr) - [`<iN>::unbounded_shl`](https://doc.rust-lang.org/stable/std/primitive.isize.html#method.unbounded_shl) - [`<iN>::unbounded_shr`](https://doc.rust-lang.org/stable/std/primitive.isize.html#method.unbounded_shr) - [`<iN>::midpoint`](https://doc.rust-lang.org/stable/std/primitive.isize.html#method.midpoint) - [`<str>::from_utf8`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8) - [`<str>::from_utf8_mut`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8\_mut) - [`<str>::from_utf8_unchecked`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8\_unchecked) - [`<str>::from_utf8_unchecked_mut`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.from_utf8\_unchecked_mut) These previously stable APIs are now stable in const contexts: - [`core::str::from_utf8_mut`](https://doc.rust-lang.org/stable/std/str/fn.from_utf8\_mut.html) - [`<[T]>::copy_from_slice`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.copy_from_slice) - [`SocketAddr::set_ip`](https://doc.rust-lang.org/stable/std/net/enum.SocketAddr.html#method.set_ip) - [`SocketAddr::set_port`](https://doc.rust-lang.org/stable/std/net/enum.SocketAddr.html#method.set_port), - [`SocketAddrV4::set_ip`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV4.html#method.set_ip) - [`SocketAddrV4::set_port`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV4.html#method.set_port), - [`SocketAddrV6::set_ip`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_ip) - [`SocketAddrV6::set_port`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_port) - [`SocketAddrV6::set_flowinfo`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_flowinfo) - [`SocketAddrV6::set_scope_id`](https://doc.rust-lang.org/stable/std/net/struct.SocketAddrV6.html#method.set_scope_id) - [`char::is_digit`](https://doc.rust-lang.org/stable/std/primitive.char.html#method.is_digit) - [`char::is_whitespace`](https://doc.rust-lang.org/stable/std/primitive.char.html#method.is_whitespace) - [`<[[T; N]]>::as_flattened`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.as_flattened) - [`<[[T; N]]>::as_flattened_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.as_flattened_mut) - [`String::into_bytes`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.into_bytes) - [`String::as_str`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_str) - [`String::capacity`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.capacity) - [`String::as_bytes`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_bytes) - [`String::len`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.len) - [`String::is_empty`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.is_empty) - [`String::as_mut_str`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_mut_str) - [`String::as_mut_vec`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.as_mut_vec) - [`Vec::as_ptr`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_ptr) - [`Vec::as_slice`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_slice) - [`Vec::capacity`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.capacity) - [`Vec::len`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.len) - [`Vec::is_empty`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.is_empty) - [`Vec::as_mut_slice`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_mut_slice) - [`Vec::as_mut_ptr`](https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.as_mut_ptr) <a id="1.87.0-Cargo"></a> ## Cargo - [Add terminal integration via ANSI OSC 9;4 sequences](rust-lang/cargo#14615) - [chore: bump openssl to v3](rust-lang/cargo#15232) - [feat(package): add --exclude-lockfile flag](rust-lang/cargo#15234) <a id="1.87.0-Compatibility-Notes"></a> ## Compatibility Notes - [Rust now raises an error for macro invocations inside the `#![crate_name]` attribute](rust-lang/rust#127581) - [Unstable fields are now always considered to be inhabited](rust-lang/rust#133889) - [Macro arguments of unary operators followed by open beginning ranges may now be matched differently](rust-lang/rust#134900) - [Make `Debug` impl of raw pointers print metadata if present](rust-lang/rust#135080) - [Warn against function pointers using unsupported ABI strings in dependencies](rust-lang/rust#135767) - [Associated types on `dyn` types are no longer deduplicated](rust-lang/rust#136458) - [Forbid attributes on `..` inside of struct patterns (`let Struct { #[attribute] .. }) =`](rust-lang/rust#136490) - [Make `ptr_cast_add_auto_to_object` lint into hard error](rust-lang/rust#136764) - Many `std::arch` intrinsics are now safe to call in some contexts, there may now be new `unused_unsafe` warnings in existing codebases. - [Limit `width` and `precision` formatting options to 16 bits on all targets](rust-lang/rust#136932) - [Turn order dependent trait objects future incompat warning into a hard error](rust-lang/rust#136968) - [Denote `ControlFlow` as `#[must_use]`](rust-lang/rust#137449) - [Windows: The standard library no longer links `advapi32`, except on win7.](rust-lang/rust#138233) Code such as C libraries that were relying on this assumption may need to explicitly link advapi32. - [Proc macros can no longer observe expanded `cfg(true)` attributes.](rust-lang/rust#138844) - [Start changing the internal representation of pasted tokens](rust-lang/rust#124141). Certain invalid declarative macros that were previously accepted in obscure circumstances are now correctly rejected by the compiler. Use of a `tt` fragment specifier can often fix these macros. - [Don't allow flattened format_args in const.](rust-lang/rust#139624) <a id="1.87.0-Internal-Changes"></a> ## Internal Changes These changes do not affect any public interfaces of Rust, but they represent significant improvements to the performance or internals of rustc and related tools. - [Update to LLVM 20](rust-lang/rust#135763) </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever MR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this MR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this MR, check this box --- This MR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).

rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Jan 20, 2025

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rustbot added the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Jan 20, 2025

bors added a commit to rust-lang-ci/rust that referenced this pull request Jan 20, 2025

Auto merge of rust-lang#135763 - nikic:llvm-20, r=<try>

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Update to LLVM 20 r? `@ghost`

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rustbot added perf-regression Performance regression. and removed S-waiting-on-perf Status: Waiting on a perf run to be completed. labels Jan 20, 2025

nikic force-pushed the llvm-20 branch from fc35e8c to 110bee6 Compare January 27, 2025 14:14

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nikic force-pushed the llvm-20 branch from 110bee6 to da0ec57 Compare January 27, 2025 14:20

nikic mentioned this pull request Jan 28, 2025

Don't build out of line atomics support code for uefi rust-lang/compiler-builtins#752

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nikic force-pushed the llvm-20 branch from 3131edb to 881aa2d Compare January 30, 2025 10:33

bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 17, 2025

bors added the merged-by-bors This PR was explicitly merged by bors. label Feb 17, 2025

bors merged commit ce36a96 into rust-lang:master Feb 17, 2025
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rustbot added this to the 1.87.0 milestone Feb 17, 2025

scottmcm mentioned this pull request Feb 17, 2025

Lower BinOp::Cmp to llvm.{s,u}cmp.* intrinsics #133984

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rustbot added the perf-regression-triaged The performance regression has been triaged. label Feb 18, 2025

beetrees mentioned this pull request Feb 20, 2025

Several platforms still have incorrectly aligned u128/i128 #128950

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StackOverflowExcept1on mentioned this pull request Mar 5, 2025

Can not disable reference-types feature for wasm32 target with -C linker-plugin-lto flag #130604

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yselkowitz mentioned this pull request Mar 9, 2025

TASK: port LLVM dependents to llvm-20, drop llvm19 fedora-eln/eln#234

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10 tasks

Muscraft modified the milestones: 1.87.0, 1.84.0 Mar 28, 2025

ReillyBrogan mentioned this pull request Mar 29, 2025

LLVM 20 AerynOS/recipes#759

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ziyao233 mentioned this pull request Apr 2, 2025

LLVM 20 transition eweOS/packages#3594

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14 tasks

lqd mentioned this pull request Apr 4, 2025

Performance regression in nightly with target-cpu=native on znver4 #139370

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MoSal mentioned this pull request Apr 13, 2025

A case of compound x86_64 performance regression caused by LLVM 20 and #124810 #139730

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BoxyUwU mentioned this pull request Apr 21, 2025

Draft release notes for 1.87 #140133

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StackOverflowExcept1on mentioned this pull request Apr 22, 2025

Many new wasm features are enabled if compile wasm32v1-none with -C linker-plugin-lto flag on LLVM 20+ #140174

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printfn mentioned this pull request May 16, 2025

wasm-opt fails on 1.87 with "Bulk memory operations require bulk memory" #141080

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reneleonhardt referenced this pull request in bosun-ai/kwaak May 19, 2025

chore: Just in docker once

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Update to LLVM 20 #135763

Update to LLVM 20 #135763

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Update to LLVM 20 #135763

Update to LLVM 20 #135763

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Overall result: ❌✅ regressions and improvements - please read the text below

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rust-timer commented Feb 17, 2025

Overall result: ❌✅ regressions and improvements - please read the text below

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