bjoernager/rust
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Shrink TyKind::FnPtr.

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By splitting the `FnSig` within `TyKind::FnPtr` into `FnSigTys` and
`FnHeader`, which can be packed more efficiently. This reduces the size
of the hot `TyKind` type from 32 bytes to 24 bytes on 64-bit platforms.
This reduces peak memory usage by a few percent on some benchmarks. It
also reduces cache misses and page faults similarly, though this doesn't
translate to clear cycles or wall-time improvements on CI.
This commit is contained in:
Nicholas Nethercote 2024-08-08 17:18:20 +10:00
parent 8640998869
commit c4717cc9d1
89 changed files with 298 additions and 201 deletions
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6
compiler/rustc_trait_selection/src/traits/select/mod.rs
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@ -2114,7 +2114,7 @@ impl<'tcx> SelectionContext<'_, 'tcx> {
| ty::Bool
| ty::Float(_)
| ty::FnDef(..)
| ty::FnPtr(_)
| ty::FnPtr(..)
| ty::RawPtr(..)
| ty::Char
| ty::Ref(..)
@ -2171,7 +2171,7 @@ impl<'tcx> SelectionContext<'_, 'tcx> {
use self::BuiltinImplConditions::{Ambiguous, None, Where};
match *self_ty.kind() {
ty::FnDef(..) | ty::FnPtr(_) | ty::Error(_) => Where(ty::Binder::dummy(Vec::new())),
ty::FnDef(..) | ty::FnPtr(..) | ty::Error(_) => Where(ty::Binder::dummy(Vec::new())),
ty::Uint(_)
| ty::Int(_)
@ -2333,7 +2333,7 @@ impl<'tcx> SelectionContext<'_, 'tcx> {
| ty::Bool
| ty::Float(_)
| ty::FnDef(..)
| ty::FnPtr(_)
| ty::FnPtr(..)
| ty::Error(_)
| ty::Infer(ty::IntVar(_) | ty::FloatVar(_))
| ty::Never