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.
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89 changed files with 298 additions and 201 deletions
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@ -414,7 +414,7 @@ impl<'p, 'tcx: 'p> RustcPatCtxt<'p, 'tcx> {
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| ty::Foreign(_)
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| ty::RawPtr(_, _)
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| ty::FnDef(_, _)
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| ty::FnPtr(_)
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| ty::FnPtr(..)
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| ty::Pat(_, _)
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| ty::Dynamic(_, _, _)
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| ty::Closure(..)
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