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Remove extern "wasm" ABI #127605

Merged
merged 1 commit into from
Jul 12, 2024
Merged

Remove extern "wasm" ABI #127605

merged 1 commit into from
Jul 12, 2024

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nikic
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@nikic nikic commented Jul 11, 2024

Remove the unstable extern "wasm" ABI (wasm_abi feature tracked in #83788).

As discussed in #127513 (comment) and following, this ABI is a failed experiment that did not end up being used for anything. Keeping support for this ABI in LLVM 19 would require us to switch wasm targets to the experimental-mv ABI, which we do not want to do.

It should be noted that Abi::Wasm was internally used for two things: The -Z wasm-c-abi=legacy ABI that is still used by default on some wasm targets, and the extern "wasm" ABI. Despite both being Abi::Wasm internally, they were not the same. An explicit extern "wasm" additionally enabled the +multivalue feature.

I've opted to remove Abi::Wasm in this patch entirely, instead of keeping it as an ABI with only internal usage. Both -Z wasm-c-abi variants are now treated as part of the normal C ABI, just with different different treatment in
adjust_for_foreign_abi.

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r? @fmease

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@rustbot rustbot added A-run-make Area: port run-make Makefiles to rmake.rs 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 Jul 11, 2024
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This PR changes Stable MIR

cc @oli-obk, @celinval, @ouz-a

This PR modifies tests/run-make/. If this PR is trying to port a Makefile
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@nikic nikic mentioned this pull request Jul 11, 2024
Remove the unstable `extern "wasm"` ABI (`wasm_abi` feature tracked
in rust-lang#83788).

As discussed in rust-lang#127513 (comment)
and following, this ABI is a failed experiment that did not end
up being used for anything. Keeping support for this ABI in LLVM 19
would require us to switch wasm targets to the `experimental-mv`
ABI, which we do not want to do.

It should be noted that `Abi::Wasm` was internally used for two
things: The `-Z wasm-c-abi=legacy` ABI that is still used by
default on some wasm targets, and the `extern "wasm"` ABI. Despite
both being `Abi::Wasm` internally, they were not the same. An
explicit `extern "wasm"` additionally enabled the `+multivalue`
feature.

I've opted to remove `Abi::Wasm` in this patch entirely, instead
of keeping it as an ABI with only internal usage. Both
`-Z wasm-c-abi` variants are now treated as part of the normal
C ABI, just with different different treatment in
adjust_for_foreign_abi.
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oli-obk commented Jul 11, 2024

@bors r+ rollup

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bors commented Jul 11, 2024

📌 Commit 8a50bcb has been approved by oli-obk

It is now in the queue for this repository.

@bors 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 Jul 11, 2024
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Thank you for doing this!

bors added a commit to rust-lang-ci/rust that referenced this pull request Jul 11, 2024
…iaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#124599 (Suggest borrowing on fn argument that is `impl AsRef`)
 - rust-lang#127572 (Don't mark `DEBUG_EVENT` struct as `repr(packed)`)
 - rust-lang#127588 (core: Limit remaining f16 doctests to x86_64 linux)
 - rust-lang#127591 (Make sure that labels are defined after the primary span in diagnostics)
 - rust-lang#127598 (Allows `#[diagnostic::do_not_recommend]` to supress trait impls in suggestions as well)
 - rust-lang#127599 (Rename `lazy_cell_consume` to `lazy_cell_into_inner`)
 - rust-lang#127601 (check is_ident before parse_ident)
 - rust-lang#127605 (Remove extern "wasm" ABI)

r? `@ghost`
`@rustbot` modify labels: rollup
@fmease fmease assigned oli-obk and unassigned fmease Jul 11, 2024
bors added a commit to rust-lang-ci/rust that referenced this pull request Jul 11, 2024
…iaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#124599 (Suggest borrowing on fn argument that is `impl AsRef`)
 - rust-lang#127572 (Don't mark `DEBUG_EVENT` struct as `repr(packed)`)
 - rust-lang#127588 (core: Limit remaining f16 doctests to x86_64 linux)
 - rust-lang#127591 (Make sure that labels are defined after the primary span in diagnostics)
 - rust-lang#127598 (Allows `#[diagnostic::do_not_recommend]` to supress trait impls in suggestions as well)
 - rust-lang#127599 (Rename `lazy_cell_consume` to `lazy_cell_into_inner`)
 - rust-lang#127601 (check is_ident before parse_ident)
 - rust-lang#127605 (Remove extern "wasm" ABI)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit fa3ce50 into rust-lang:master Jul 12, 2024
6 checks passed
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request Jul 12, 2024
Rollup merge of rust-lang#127605 - nikic:remove-extern-wasm, r=oli-obk

Remove extern "wasm" ABI

Remove the unstable `extern "wasm"` ABI (`wasm_abi` feature tracked in rust-lang#83788).

As discussed in rust-lang#127513 (comment) and following, this ABI is a failed experiment that did not end up being used for anything. Keeping support for this ABI in LLVM 19 would require us to switch wasm targets to the `experimental-mv` ABI, which we do not want to do.

It should be noted that `Abi::Wasm` was internally used for two things: The `-Z wasm-c-abi=legacy` ABI that is still used by default on some wasm targets, and the `extern "wasm"` ABI. Despite both being `Abi::Wasm` internally, they were not the same. An explicit `extern "wasm"` additionally enabled the `+multivalue` feature.

I've opted to remove `Abi::Wasm` in this patch entirely, instead of keeping it as an ABI with only internal usage. Both `-Z wasm-c-abi` variants are now treated as part of the normal C ABI, just with different different treatment in
adjust_for_foreign_abi.
@rustbot rustbot added this to the 1.81.0 milestone Jul 12, 2024
bors added a commit to rust-lang-ci/rust that referenced this pull request Jul 25, 2024
Update to LLVM 19

Related changes:
 * rust-lang#127605
 * rust-lang#127613
 * rust-lang#127654
 * rust-lang#128141
 * llvm/llvm-project#98933

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 added a commit to rust-lang-ci/rust that referenced this pull request Jul 25, 2024
Update to LLVM 19

Related changes:
 * rust-lang#127605
 * rust-lang#127613
 * rust-lang#127654
 * rust-lang#128141
 * llvm/llvm-project#98933

try-job: x86_64-msvc
try-job: i686-msvc
try-job: x86_64-msvc-ext
try-job: dist-x86_64-msvc
try-job: dist-i686-msvc
try-job: dist-aarch64-msvc
try-job: dist-x86_64-msvc-alt
bors added a commit to rust-lang-ci/rust that referenced this pull request Jul 25, 2024
Update to LLVM 19

Related changes:
 * rust-lang#127605
 * rust-lang#127613
 * rust-lang#127654
 * rust-lang#128141
 * llvm/llvm-project#98933

try-job: i686-mingw
try-job: x86_64-mingw
try-job: dist-i686-mingw
try-job: dist-x86_64-mingw
jaisnan pushed a commit to jaisnan/rust-dev that referenced this pull request Jul 29, 2024
Update Rust toolchain from nightly-2024-07-12 to nightly-2024-07-13
without any other source changes.
This is an automatically generated pull request. If any of the CI checks
fail, manual intervention is required. In such a case, review the
changes at https://github.com/rust-lang/rust from
rust-lang@5315cbe
up to
rust-lang@c6727fc.
The log for this commit range is:
rust-lang@c6727fc9b5 Auto merge of
rust-lang#123351 - beetrees:x86-ret-snan-rust, r=nikic,workingjubilee
rust-lang@62c068feea Auto merge of
rust-lang#127636 - nnethercote:fix-Parser-look_ahead, r=oli-obk
rust-lang@5d76a13bbe Auto merge of
rust-lang#127653 - matthiaskrgr:rollup-72bqgvp, r=matthiaskrgr
rust-lang@f11c2c8e95 Rollup merge of
rust-lang#127648 - Kobzol:ci-lower-timeout, r=pietroalbini
rust-lang@526da2366a Rollup merge of
rust-lang#127627 - lcnr:rustc_search_graph, r=compiler-errors
rust-lang@f5fa6fb602 Rollup merge of
rust-lang#127613 - nikic:riscv-update, r=cuviper
rust-lang@b4f002d2e5 Rollup merge of
rust-lang#127552 - onur-ozkan:unnecessary-git-usage, r=Kobzol
rust-lang@8ceb4e49ff Rollup merge of
rust-lang#127433 - dtolnay:conststrlen, r=workingjubilee
rust-lang@f9b3e8b387 Rollup merge of
rust-lang#126827 - the8472:pidfd-spawn, r=workingjubilee
rust-lang@18152d72a4 Rollup merge of
rust-lang#126639 - sayantn:amx, r=Amanieu
rust-lang@65ea92d4a1 Rollup merge of
rust-lang#124980 - zachs18:rc-allocator, r=Amanieu
rust-lang@05eac57ef6 Auto merge of
rust-lang#127479 - Urgau:rustc-stable-hash, r=michaelwoerister
rust-lang@15f770b143 enable fuzzing of
`SearchGraph`
rust-lang@cae9d480bf Adjust tests for x86
"Rust" ABI changes
rust-lang@3f4b9dd463 Lower timeout of CI
jobs to 4 hours
rust-lang@7f1518bddd Add instability
attribute on private const_strlen function
rust-lang@b286722878 Auto merge of
rust-lang#127635 - matthiaskrgr:rollup-foopajr, r=matthiaskrgr
rust-lang@100f3fd133 Add a new special
case to `Parser::look_ahead`.
rust-lang@ebe1305b1e Remove the bogus
special case from `Parser::look_ahead`.
rust-lang@dad95578b0 Add unit tests for
`Parser::look_ahead`.
rust-lang@ec05c4ea3f Add the feature gate
and target-features
rust-lang@c2b7842555 Rollup merge of
rust-lang#127625 - SkiFire13:revert-comment-deletion, r=workingjubilee
rust-lang@ca576eae4e Rollup merge of
rust-lang#127622 - compiler-errors:builtin-internal, r=lqd
rust-lang@fe564c10ab Rollup merge of
rust-lang#127607 - Zalathar:normalize-hint, r=wesleywiser
rust-lang@83d1a1b252 Rollup merge of
rust-lang#127596 - tesuji:help-unwrap-or, r=compiler-errors
rust-lang@1e7ad4c3ed Rollup merge of
rust-lang#127422 - greaka:master, r=workingjubilee
rust-lang@58fe37f2c3 Rollup merge of
rust-lang#127164 - Nadrieril:clean-lowering-loop, r=matthewjasper
rust-lang@4a31a6c32a Auto merge of
rust-lang#127382 - estebank:const-let, r=compiler-errors
rust-lang@5e311f933d Auto merge of
rust-lang#127614 - matthiaskrgr:rollup-8geziwi, r=matthiaskrgr
rust-lang@a776e5f922 Add doc for
deconstruct_option_or_result
rust-lang@872d7b82e1 Add suggestion for
`Option<&Vec<T>> -> Option<&[T]`
rust-lang@d9170dc666 Add regression test
for issue 127545
rust-lang@4df75140dd Fix aarch64 test
rust-lang@cbe75486f7 Account for `let foo
= expr`; to suggest `const foo: Ty = expr;`
rust-lang@b56dc8ee90 Use verbose style
when suggesting changing `const` with `let`
rust-lang@d9021791eb Revert accidental
comment deletion
rust-lang@b77d3ef7c4 Mark builtin syntax
as internal
rust-lang@fa3ce50f0b Rollup merge of
rust-lang#127605 - nikic:remove-extern-wasm, r=oli-obk
rust-lang@d433f176ef Rollup merge of
rust-lang#127601 - trevyn:issue-127600, r=compiler-errors
rust-lang@47ab86653e Rollup merge of
rust-lang#127599 - tgross35:lazy_cell_consume-rename, r=workingjubilee
rust-lang@a10b4d1463 Rollup merge of
rust-lang#127598 - weiznich:diagnostic_do_not_recommend_also_skips_help,
r=compiler-errors
rust-lang@73c500b3a7 Rollup merge of
rust-lang#127591 - compiler-errors:label-after-primary, r=lcnr
rust-lang@380c78741e Rollup merge of
rust-lang#127588 - uweigand:s390x-f16-doctests, r=tgross35
rust-lang@6fd955549a Rollup merge of
rust-lang#127572 - tbu-:pr_debug_event_nonpacked, r=jhpratt
rust-lang@8de487fdbd Rollup merge of
rust-lang#124599 - estebank:issue-41708, r=wesleywiser
rust-lang@55256c5a18 Update
dist-riscv64-linux to binutils 2.40
rust-lang@977439d9b8 Use uplifted
`rustc-stable-hash` crate in `rustc_data_structures`
rust-lang@f56b2074c6 solve -> solve/mod
rust-lang@08a2992d6b compiletest: Better
error message for bad `normalize-*` headers
rust-lang@8a50bcbdce Remove extern "wasm"
ABI
rust-lang@a01f49e7f3 check is_ident
before parse_ident
rust-lang@ab56fe2053 Rename
`lazy_cell_consume` to `lazy_cell_into_inner`
rust-lang@27d5db166e Allows
`#[diagnostic::do_not_recommend]` to supress trait impls in suggestions
as well
rust-lang@12ae282987 Fix diagnostic and
add a test for it
rust-lang@df72e478b0 Make sure that
labels are defined after the primary span in diagnostics
rust-lang@0065763950 core: Limit
remaining f16 doctests to x86_64 linux
rust-lang@45ad522e87 Don't mark
`DEBUG_EVENT` struct as `repr(packed)`
rust-lang@0134bd2e67 remove unnecessary
`git` usages
rust-lang@42772e98e0 Address review
comments
rust-lang@3e030b38ef Return the
`otherwise_block` instead of passing it as argument
rust-lang@fc40247c6b Factor out the
"process remaining candidates" cases
rust-lang@8a222ffd6b Don't try to save an
extra block
rust-lang@c5062f7318 Move or-pattern
expansion inside the main part of the algorithm
rust-lang@bff4d213fa Factor out the
special handling of or-patterns
rust-lang@5bf50e66f9 Move a function
rust-lang@53d3e6217b Stabilize
const_cstr_from_ptr (CStr::from_ptr, CStr::count_bytes)
rust-lang@585ca16e0b as_simd: fix comment
to be in line with 507583a (rust-lang#121201)
rust-lang@0f643c449a Ensure tests don't
fail on i586 in CI
rust-lang@ec0c755704 Check that we get
somewhat sane PIDs when spawning with pidfds
rust-lang@3e4e31b7bf more fine-grained
feature-detection for pidfd spawning
rust-lang@0ce361938e document safety
properties of the internal Process::new constructor
rust-lang@6687a3f7da use pidfd_spawn for
faster process creation when pidfds are requested
rust-lang@5c46acac04 document the cvt
methods
rust-lang@0e1c832dbd Update
`platform-support.md` to reflect improvements in returning floats on
32-bit x86
rust-lang@952becc0bd Ensure floats are
returned losslessly by the Rust ABI on 32-bit x86
rust-lang@a1ad6346d6 Add fn allocator
method to rc/sync::Weak. Relax Rc<T>/Arc<T>::allocator to allow unsized
T.
rust-lang@2df4f7dd8c Suggest borrowing on
fn argument that is `impl AsRef`

Co-authored-by: celinval <[email protected]>
bors added a commit to rust-lang-ci/rust that referenced this pull request Jul 31, 2024
Update to LLVM 19

The LLVM 19.1.0 final release is planned for Sep 3rd. The rustc 1.82 stable release will be on Oct 17th.

The unstable MC/DC coverage support is temporarily broken by this update. It will be restored by rust-lang#126733. The implementation changed substantially in LLVM 19, and there are no plans to support both the LLVM 18 and LLVM 19 implementation at the same time.

Compatibility note for wasm:

> WebAssembly target support for the `multivalue` target feature has changed when upgrading to LLVM 19. Support for generating functions with multiple returns no longer works and `-Ctarget-feature=+multivalue` has a different meaning than it did in LLVM 18 and prior. The WebAssembly target features `multivalue` and `reference-types` are now both enabled by default, but generated code is not affected by default. These features being enabled are encoded in the `target_features` custom section and may affect downstream tooling such as `wasm-opt` consuming the module, but the actual generated WebAssembly will continue to not use either `multivalue` or `reference-types` by default. There is no longer any supported means to generate a module that has a function with multiple returns.

Related changes:
 * rust-lang#127605
 * rust-lang#127613
 * rust-lang#127654
 * rust-lang#128141
 * llvm/llvm-project#98933

Fixes rust-lang#121444.
Fixes rust-lang#128212.
bors added a commit to rust-lang-ci/rust that referenced this pull request Jul 31, 2024
Update to LLVM 19

The LLVM 19.1.0 final release is planned for Sep 3rd. The rustc 1.82 stable release will be on Oct 17th.

The unstable MC/DC coverage support is temporarily broken by this update. It will be restored by rust-lang#126733. The implementation changed substantially in LLVM 19, and there are no plans to support both the LLVM 18 and LLVM 19 implementation at the same time.

Compatibility note for wasm:

> WebAssembly target support for the `multivalue` target feature has changed when upgrading to LLVM 19. Support for generating functions with multiple returns no longer works and `-Ctarget-feature=+multivalue` has a different meaning than it did in LLVM 18 and prior. The WebAssembly target features `multivalue` and `reference-types` are now both enabled by default, but generated code is not affected by default. These features being enabled are encoded in the `target_features` custom section and may affect downstream tooling such as `wasm-opt` consuming the module, but the actual generated WebAssembly will continue to not use either `multivalue` or `reference-types` by default. There is no longer any supported means to generate a module that has a function with multiple returns.

Related changes:
 * rust-lang#127605
 * rust-lang#127613
 * rust-lang#127654
 * rust-lang#128141
 * llvm/llvm-project#98933

Fixes rust-lang#121444.
Fixes rust-lang#128212.
bors added a commit to rust-lang-ci/rust that referenced this pull request Jul 31, 2024
Update to LLVM 19

The LLVM 19.1.0 final release is planned for Sep 3rd. The rustc 1.82 stable release will be on Oct 17th.

The unstable MC/DC coverage support is temporarily broken by this update. It will be restored by rust-lang#126733. The implementation changed substantially in LLVM 19, and there are no plans to support both the LLVM 18 and LLVM 19 implementation at the same time.

Compatibility note for wasm:

> WebAssembly target support for the `multivalue` target feature has changed when upgrading to LLVM 19. Support for generating functions with multiple returns no longer works and `-Ctarget-feature=+multivalue` has a different meaning than it did in LLVM 18 and prior. The WebAssembly target features `multivalue` and `reference-types` are now both enabled by default, but generated code is not affected by default. These features being enabled are encoded in the `target_features` custom section and may affect downstream tooling such as `wasm-opt` consuming the module, but the actual generated WebAssembly will continue to not use either `multivalue` or `reference-types` by default. There is no longer any supported means to generate a module that has a function with multiple returns.

Related changes:
 * rust-lang#127605
 * rust-lang#127613
 * rust-lang#127654
 * rust-lang#128141
 * llvm/llvm-project#98933

Fixes rust-lang#121444.
Fixes rust-lang#128212.
github-actions bot pushed a commit to rust-lang/miri that referenced this pull request Aug 2, 2024
Update to LLVM 19

The LLVM 19.1.0 final release is planned for Sep 3rd. The rustc 1.82 stable release will be on Oct 17th.

The unstable MC/DC coverage support is temporarily broken by this update. It will be restored by rust-lang/rust#126733. The implementation changed substantially in LLVM 19, and there are no plans to support both the LLVM 18 and LLVM 19 implementation at the same time.

Compatibility note for wasm:

> WebAssembly target support for the `multivalue` target feature has changed when upgrading to LLVM 19. Support for generating functions with multiple returns no longer works and `-Ctarget-feature=+multivalue` has a different meaning than it did in LLVM 18 and prior. The WebAssembly target features `multivalue` and `reference-types` are now both enabled by default, but generated code is not affected by default. These features being enabled are encoded in the `target_features` custom section and may affect downstream tooling such as `wasm-opt` consuming the module, but the actual generated WebAssembly will continue to not use either `multivalue` or `reference-types` by default. There is no longer any supported means to generate a module that has a function with multiple returns.

Related changes:
 * rust-lang/rust#127605
 * rust-lang/rust#127613
 * rust-lang/rust#127654
 * rust-lang/rust#128141
 * llvm/llvm-project#98933

Fixes rust-lang/rust#121444.
Fixes rust-lang/rust#128212.
lnicola pushed a commit to lnicola/rust-analyzer that referenced this pull request Aug 13, 2024
Update to LLVM 19

The LLVM 19.1.0 final release is planned for Sep 3rd. The rustc 1.82 stable release will be on Oct 17th.

The unstable MC/DC coverage support is temporarily broken by this update. It will be restored by rust-lang/rust#126733. The implementation changed substantially in LLVM 19, and there are no plans to support both the LLVM 18 and LLVM 19 implementation at the same time.

Compatibility note for wasm:

> WebAssembly target support for the `multivalue` target feature has changed when upgrading to LLVM 19. Support for generating functions with multiple returns no longer works and `-Ctarget-feature=+multivalue` has a different meaning than it did in LLVM 18 and prior. The WebAssembly target features `multivalue` and `reference-types` are now both enabled by default, but generated code is not affected by default. These features being enabled are encoded in the `target_features` custom section and may affect downstream tooling such as `wasm-opt` consuming the module, but the actual generated WebAssembly will continue to not use either `multivalue` or `reference-types` by default. There is no longer any supported means to generate a module that has a function with multiple returns.

Related changes:
 * rust-lang/rust#127605
 * rust-lang/rust#127613
 * rust-lang/rust#127654
 * rust-lang/rust#128141
 * llvm/llvm-project#98933

Fixes rust-lang/rust#121444.
Fixes rust-lang/rust#128212.
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