Auto merge of #128812 - nnethercote:shrink-TyKind-FnPtr, r=compiler-errors
Shrink `TyKind::FnPtr`. 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. r? `@compiler-errors`
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commit
e9c965df7b
89 changed files with 315 additions and 231 deletions
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@ -2113,7 +2113,7 @@ impl<'tcx> SelectionContext<'_, 'tcx> {
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| ty::Bool
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| ty::Float(_)
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| ty::FnDef(..)
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| ty::FnPtr(_)
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| ty::FnPtr(..)
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| ty::RawPtr(..)
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| ty::Char
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| ty::Ref(..)
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@ -2170,7 +2170,7 @@ impl<'tcx> SelectionContext<'_, 'tcx> {
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use self::BuiltinImplConditions::{Ambiguous, None, Where};
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match *self_ty.kind() {
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ty::FnDef(..) | ty::FnPtr(_) | ty::Error(_) => Where(ty::Binder::dummy(Vec::new())),
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ty::FnDef(..) | ty::FnPtr(..) | ty::Error(_) => Where(ty::Binder::dummy(Vec::new())),
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ty::Uint(_)
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| ty::Int(_)
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@ -2332,7 +2332,7 @@ impl<'tcx> SelectionContext<'_, 'tcx> {
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| ty::Bool
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| ty::Float(_)
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| ty::FnDef(..)
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| ty::FnPtr(_)
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| ty::FnPtr(..)
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| ty::Error(_)
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| ty::Infer(ty::IntVar(_) | ty::FloatVar(_))
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| ty::Never
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