bjoernager/rust
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Inline derived hash function.

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Because most of the other derived functions are inlined: `clone`,
`default`, `eq`, `partial_cmp`, `cmp`. The exception is `fmt`, but it
tends to not be on hot paths as much.
This commit is contained in:
Nicholas Nethercote 2023-05-26 06:55:06 +10:00
parent 8b4b20836b
commit 5b0324fce0
2 changed files with 18 additions and 2 deletions
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5
compiler/rustc_builtin_macros/src/deriving/hash.rs
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@ -1,7 +1,7 @@
use crate::deriving::generic::ty::*;
use crate::deriving::generic::*;
use crate::deriving::{path_std, pathvec_std};
use rustc_ast::{AttrVec, MetaItem, Mutability};
use rustc_ast::{MetaItem, Mutability};
use rustc_expand::base::{Annotatable, ExtCtxt};
use rustc_span::symbol::sym;
use rustc_span::Span;
@ -20,6 +20,7 @@ pub fn expand_deriving_hash(
let typaram = sym::__H;
let arg = Path::new_local(typaram);
let attrs = thin_vec![cx.attr_word(sym::inline, span)];
let hash_trait_def = TraitDef {
span,
path,
@ -33,7 +34,7 @@ pub fn expand_deriving_hash(
explicit_self: true,
nonself_args: vec![(Ref(Box::new(Path(arg)), Mutability::Mut), sym::state)],
ret_ty: Unit,
attributes: AttrVec::new(),
attributes: attrs,
fieldless_variants_strategy: FieldlessVariantsStrategy::Unify,
combine_substructure: combine_substructure(Box::new(|a, b, c| {
hash_substructure(a, b, c)