diff options
| -rw-r--r-- | compiler/rustc_hir/src/hir.rs | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/compiler/rustc_hir/src/hir.rs b/compiler/rustc_hir/src/hir.rs index 96501844264..4ccc2e5a97c 100644 --- a/compiler/rustc_hir/src/hir.rs +++ b/compiler/rustc_hir/src/hir.rs @@ -148,6 +148,11 @@ impl From<Ident> for LifetimeSyntax { /// `LifetimeSource::OutlivesBound` or `LifetimeSource::PreciseCapturing` /// — there's no way to "elide" these lifetimes. #[derive(Debug, Copy, Clone, HashStable_Generic)] +// Raise the aligement to at least 4 bytes - this is relied on in other parts of the compiler(for pointer tagging): +// https://github.com/rust-lang/rust/blob/ce5fdd7d42aba9a2925692e11af2bd39cf37798a/compiler/rustc_data_structures/src/tagged_ptr.rs#L163 +// Removing this `repr(4)` will cause the compiler to not build on platforms like `m68k` Linux, where the aligement of u32 and usize is only 2. +// Since `repr(align)` may only raise aligement, this has no effect on platforms where the aligement is already sufficient. +#[repr(align(4))] pub struct Lifetime { #[stable_hasher(ignore)] pub hir_id: HirId, |