Ensure correct aligement of rustc_hir::Lifetime on platforms with lower default alignments. #144578
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
…er default alignments.
|
r? @davidtwco rustbot has assigned @davidtwco. Use |
rustbot
added
S-waiting-on-review
compiler-errors
approved these changes
Jul 28, 2025
|
@bors r+ rollup |
bors
added
S-waiting-on-bors
samueltardieu
added a commit
to samueltardieu/rust
that referenced
this pull request
Jul 28, 2025
…rors Ensure correct aligement of rustc_hir::Lifetime on platforms with lower default alignments. The compiler relies on `hir::Lifetime` being aligned to at least 4 bytes(for the purposes of pointer tagging). However, on some systems(like m68k) with lower alignment requirements(eg. usize / u32 aligned to 2 bytes),`hir::Lifetime` will be aligned to only 2 bytes. This causes the compilation to fail on those systems - a const assert in the compiler fails. This PR makes the aligement requriement of hir::Lifetime explict. This has no effect on platforms where that already is the case(repr align can only raise alignment), but ensures the alignment will stay correct no matter what.
bors
added a commit
that referenced
this pull request
Jul 29, 2025
Rollup of 11 pull requests Successful merges: - #143289 (Remove `[T]::array_chunks(_mut)`) - #143883 (Add `--link-targets-dir` argument to linkchecker) - #144034 (tests: Test line number in debuginfo for diverging function calls) - #144236 (Add `core::mem::DropGuard`) - #144268 (Add method `find_ancestor_not_from_macro` and `find_ancestor_not_from_extern_macro` to supersede `find_oldest_ancestor_in_same_ctxt`) - #144303 (Consolidate staging for `rustc_private` tools) - #144539 (constify with_exposed_provenance) - #144569 (rustc-dev-guide subtree update) - #144573 (Raw Pointers are Constant PatKinds too) - #144578 (Ensure correct aligement of rustc_hir::Lifetime on platforms with lower default alignments.) - #144582 (fix `Atomic*::as_ptr` wording) r? `@ghost` `@rustbot` modify labels: rollup
Zalathar
added a commit
to Zalathar/rust
that referenced
this pull request
Jul 29, 2025
…rors Ensure correct aligement of rustc_hir::Lifetime on platforms with lower default alignments. The compiler relies on `hir::Lifetime` being aligned to at least 4 bytes(for the purposes of pointer tagging). However, on some systems(like m68k) with lower alignment requirements(eg. usize / u32 aligned to 2 bytes),`hir::Lifetime` will be aligned to only 2 bytes. This causes the compilation to fail on those systems - a const assert in the compiler fails. This PR makes the aligement requriement of hir::Lifetime explict. This has no effect on platforms where that already is the case(repr align can only raise alignment), but ensures the alignment will stay correct no matter what.
Zalathar
added a commit
to Zalathar/rust
that referenced
this pull request
Jul 29, 2025
…rors Ensure correct aligement of rustc_hir::Lifetime on platforms with lower default alignments. The compiler relies on `hir::Lifetime` being aligned to at least 4 bytes(for the purposes of pointer tagging). However, on some systems(like m68k) with lower alignment requirements(eg. usize / u32 aligned to 2 bytes),`hir::Lifetime` will be aligned to only 2 bytes. This causes the compilation to fail on those systems - a const assert in the compiler fails. This PR makes the aligement requriement of hir::Lifetime explict. This has no effect on platforms where that already is the case(repr align can only raise alignment), but ensures the alignment will stay correct no matter what.
Zalathar
added a commit
to Zalathar/rust
that referenced
this pull request
Jul 29, 2025
…rors Ensure correct aligement of rustc_hir::Lifetime on platforms with lower default alignments. The compiler relies on `hir::Lifetime` being aligned to at least 4 bytes(for the purposes of pointer tagging). However, on some systems(like m68k) with lower alignment requirements(eg. usize / u32 aligned to 2 bytes),`hir::Lifetime` will be aligned to only 2 bytes. This causes the compilation to fail on those systems - a const assert in the compiler fails. This PR makes the aligement requriement of hir::Lifetime explict. This has no effect on platforms where that already is the case(repr align can only raise alignment), but ensures the alignment will stay correct no matter what.
bors
added a commit
that referenced
this pull request
Jul 29, 2025
Rollup of 11 pull requests Successful merges: - #143883 (Add `--link-targets-dir` argument to linkchecker) - #144236 (Add `core::mem::DropGuard`) - #144303 (Consolidate staging for `rustc_private` tools) - #144367 (Move dist-apple-various from x86_64 to aarch64) - #144539 (constify with_exposed_provenance) - #144569 (rustc-dev-guide subtree update) - #144573 (Raw Pointers are Constant PatKinds too) - #144575 (fixed typo chunks->as_chunks) - #144578 (Ensure correct aligement of rustc_hir::Lifetime on platforms with lower default alignments.) - #144582 (fix `Atomic*::as_ptr` wording) - #144616 (coverage: Regression test for "function name is empty" bug) r? `@ghost` `@rustbot` modify labels: rollup
bors
added a commit
that referenced
this pull request
Jul 29, 2025
Rollup of 10 pull requests Successful merges: - #143883 (Add `--link-targets-dir` argument to linkchecker) - #144236 (Add `core::mem::DropGuard`) - #144367 (Move dist-apple-various from x86_64 to aarch64) - #144539 (constify with_exposed_provenance) - #144569 (rustc-dev-guide subtree update) - #144573 (Raw Pointers are Constant PatKinds too) - #144575 (fixed typo chunks->as_chunks) - #144578 (Ensure correct aligement of rustc_hir::Lifetime on platforms with lower default alignments.) - #144582 (fix `Atomic*::as_ptr` wording) - #144616 (coverage: Regression test for "function name is empty" bug) r? `@ghost` `@rustbot` modify labels: rollup
rust-timer
added a commit
that referenced
this pull request
Jul 29, 2025
Rollup merge of #144578 - FractalFir:m68k_fix, r=compiler-errors Ensure correct aligement of rustc_hir::Lifetime on platforms with lower default alignments. The compiler relies on `hir::Lifetime` being aligned to at least 4 bytes(for the purposes of pointer tagging). However, on some systems(like m68k) with lower alignment requirements(eg. usize / u32 aligned to 2 bytes),`hir::Lifetime` will be aligned to only 2 bytes. This causes the compilation to fail on those systems - a const assert in the compiler fails. This PR makes the aligement requriement of hir::Lifetime explict. This has no effect on platforms where that already is the case(repr align can only raise alignment), but ensures the alignment will stay correct no matter what.
github-actions bot
pushed a commit
to rust-lang/rustc-dev-guide
that referenced
this pull request
Jul 31, 2025
Rollup of 10 pull requests Successful merges: - rust-lang/rust#143883 (Add `--link-targets-dir` argument to linkchecker) - rust-lang/rust#144236 (Add `core::mem::DropGuard`) - rust-lang/rust#144367 (Move dist-apple-various from x86_64 to aarch64) - rust-lang/rust#144539 (constify with_exposed_provenance) - rust-lang/rust#144569 (rustc-dev-guide subtree update) - rust-lang/rust#144573 (Raw Pointers are Constant PatKinds too) - rust-lang/rust#144575 (fixed typo chunks->as_chunks) - rust-lang/rust#144578 (Ensure correct aligement of rustc_hir::Lifetime on platforms with lower default alignments.) - rust-lang/rust#144582 (fix `Atomic*::as_ptr` wording) - rust-lang/rust#144616 (coverage: Regression test for "function name is empty" bug) r? `@ghost` `@rustbot` modify labels: rollup
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
5 participants
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
The compiler relies on
hir::Lifetimebeing aligned to at least 4 bytes(for the purposes of pointer tagging).However, on some systems(like m68k) with lower alignment requirements(eg. usize / u32 aligned to 2 bytes),
hir::Lifetimewill be aligned to only 2 bytes.This causes the compilation to fail on those systems - a const assert in the compiler fails.
This PR makes the aligement requriement of hir::Lifetime explict. This has no effect on platforms where that already is the case(repr align can only raise alignment), but ensures the alignment will stay correct no matter what.