Handle asm const similar to inline const by nbdd0121 · Pull Request #137686 · rust-lang/rust

@nbdd0121

There is a `visit_inline_const` visitor method and it is used instead.

@rustbot 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

Feb 26, 2025

compiler-errors

compiler-errors

@nbdd0121

@nbdd0121

compiler-errors

@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

Feb 28, 2025

matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request

Feb 28, 2025
Handle asm const similar to inline const

Previously, asm consts are handled similar to anon consts rather than inline consts. Anon consts are not good at dealing with lifetimes, because `type_of` has lifetimes erased already. Inline consts can deal with lifetimes because they live in an outer typeck context. And since `global_asm!` lacks an outer typeck context, we have implemented asm consts with anon consts while they're in fact more similar to inline consts.

This was changed in rust-lang#137180, and this means that handling asm consts as inline consts are possible. While as `@compiler-errors` pointed out, `const` currently can't be used with any types with lifetime, this is about to change if rust-lang#128464 is implemented. This PR is a preparatory PR for that feature.

As an unintentional side effect, fix rust-lang#117877.

cc `@Amanieu`
r? `@compiler-errors`

bors added a commit to rust-lang-ci/rust that referenced this pull request

Feb 28, 2025
…iaskrgr

Rollup of 11 pull requests

Successful merges:

 - rust-lang#137045 (Defer repeat expr `Copy` checks to end of type checking)
 - rust-lang#137171 (Suggest swapping equality on E0277)
 - rust-lang#137634 (Update `compiler-builtins` to 0.1.149)
 - rust-lang#137686 (Handle asm const similar to inline const)
 - rust-lang#137689 (Use `Binder<Vec<Ty>>` instead of `Vec<Binder<Ty>>` in both solvers for sized/auto traits/etc.)
 - rust-lang#137718 (Use original command for showing sccache stats)
 - rust-lang#137723 (Make `rust.description` more general-purpose and pass `CFG_VER_DESCRIPTION`)
 - rust-lang#137730 (checked_ilog tests: deal with a bit of float imprecision)
 - rust-lang#137735 (Update E0133 docs for 2024 edition)
 - rust-lang#137742 (unconditionally lower match arm even if it's unneeded for never pattern in match)
 - rust-lang#137771 (Tweak incorrect ABI suggestion)

r? `@ghost`
`@rustbot` modify labels: rollup

bors added a commit to rust-lang-ci/rust that referenced this pull request

Feb 28, 2025
…iaskrgr

Rollup of 11 pull requests

Successful merges:

 - rust-lang#137045 (Defer repeat expr `Copy` checks to end of type checking)
 - rust-lang#137171 (Suggest swapping equality on E0277)
 - rust-lang#137634 (Update `compiler-builtins` to 0.1.149)
 - rust-lang#137686 (Handle asm const similar to inline const)
 - rust-lang#137689 (Use `Binder<Vec<Ty>>` instead of `Vec<Binder<Ty>>` in both solvers for sized/auto traits/etc.)
 - rust-lang#137718 (Use original command for showing sccache stats)
 - rust-lang#137723 (Make `rust.description` more general-purpose and pass `CFG_VER_DESCRIPTION`)
 - rust-lang#137730 (checked_ilog tests: deal with a bit of float imprecision)
 - rust-lang#137735 (Update E0133 docs for 2024 edition)
 - rust-lang#137742 (unconditionally lower match arm even if it's unneeded for never pattern in match)
 - rust-lang#137771 (Tweak incorrect ABI suggestion)

r? `@ghost`
`@rustbot` modify labels: rollup

bors added a commit to rust-lang-ci/rust that referenced this pull request

Feb 28, 2025
…iaskrgr

Rollup of 11 pull requests

Successful merges:

 - rust-lang#137045 (Defer repeat expr `Copy` checks to end of type checking)
 - rust-lang#137171 (Suggest swapping equality on E0277)
 - rust-lang#137634 (Update `compiler-builtins` to 0.1.149)
 - rust-lang#137686 (Handle asm const similar to inline const)
 - rust-lang#137689 (Use `Binder<Vec<Ty>>` instead of `Vec<Binder<Ty>>` in both solvers for sized/auto traits/etc.)
 - rust-lang#137718 (Use original command for showing sccache stats)
 - rust-lang#137723 (Make `rust.description` more general-purpose and pass `CFG_VER_DESCRIPTION`)
 - rust-lang#137730 (checked_ilog tests: deal with a bit of float imprecision)
 - rust-lang#137735 (Update E0133 docs for 2024 edition)
 - rust-lang#137742 (unconditionally lower match arm even if it's unneeded for never pattern in match)
 - rust-lang#137771 (Tweak incorrect ABI suggestion)

r? `@ghost`
`@rustbot` modify labels: rollup

matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request

Feb 28, 2025
Handle asm const similar to inline const

Previously, asm consts are handled similar to anon consts rather than inline consts. Anon consts are not good at dealing with lifetimes, because `type_of` has lifetimes erased already. Inline consts can deal with lifetimes because they live in an outer typeck context. And since `global_asm!` lacks an outer typeck context, we have implemented asm consts with anon consts while they're in fact more similar to inline consts.

This was changed in rust-lang#137180, and this means that handling asm consts as inline consts are possible. While as ``@compiler-errors`` pointed out, `const` currently can't be used with any types with lifetime, this is about to change if rust-lang#128464 is implemented. This PR is a preparatory PR for that feature.

As an unintentional side effect, fix rust-lang#117877.

cc ``@Amanieu``
r? ``@compiler-errors``

This was referenced

Feb 28, 2025

bors added a commit to rust-lang-ci/rust that referenced this pull request

Mar 1, 2025
…iaskrgr

Rollup of 9 pull requests

Successful merges:

 - rust-lang#137045 (Defer repeat expr `Copy` checks to end of type checking)
 - rust-lang#137171 (Suggest swapping equality on E0277)
 - rust-lang#137686 (Handle asm const similar to inline const)
 - rust-lang#137689 (Use `Binder<Vec<Ty>>` instead of `Vec<Binder<Ty>>` in both solvers for sized/auto traits/etc.)
 - rust-lang#137718 (Use original command for showing sccache stats)
 - rust-lang#137730 (checked_ilog tests: deal with a bit of float imprecision)
 - rust-lang#137735 (Update E0133 docs for 2024 edition)
 - rust-lang#137742 (unconditionally lower match arm even if it's unneeded for never pattern in match)
 - rust-lang#137771 (Tweak incorrect ABI suggestion and make suggestion verbose)

Failed merges:

 - rust-lang#137723 (Make `rust.description` more general-purpose and pass `CFG_VER_DESCRIPTION`)

r? `@ghost`
`@rustbot` modify labels: rollup

rust-timer added a commit to rust-lang-ci/rust that referenced this pull request

Mar 1, 2025
Rollup merge of rust-lang#137686 - nbdd0121:asm_const, r=compiler-errors

Handle asm const similar to inline const

Previously, asm consts are handled similar to anon consts rather than inline consts. Anon consts are not good at dealing with lifetimes, because `type_of` has lifetimes erased already. Inline consts can deal with lifetimes because they live in an outer typeck context. And since `global_asm!` lacks an outer typeck context, we have implemented asm consts with anon consts while they're in fact more similar to inline consts.

This was changed in rust-lang#137180, and this means that handling asm consts as inline consts are possible. While as `@compiler-errors` pointed out, `const` currently can't be used with any types with lifetime, this is about to change if rust-lang#128464 is implemented. This PR is a preparatory PR for that feature.

As an unintentional side effect, fix rust-lang#117877.

cc `@Amanieu`
r? `@compiler-errors`

@ojeda ojeda mentioned this pull request

Mar 14, 2025

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