4326a44e6f
In the `Tree` and `Dfa` representations of a type's layout, store byte ranges rather than needing to separately store each byte value. This permits us to, for example, represent a `u8` using a single 0..=255 edge in the DFA rather than using 256 separate edges. This leads to drastic performance improvements. For example, on the author's 2024 MacBook Pro, the time to convert the `Tree` representation of a `u64` to its equivalent DFA representation drops from ~8.5ms to ~1us, a reduction of ~8,500x. See `bench_dfa_from_tree`. Similarly, the time to execute a transmutability query from `u64` to `u64` drops from ~35us to ~1.7us, a reduction of ~20x. See `bench_transmute`.
24 lines
592 B
TOML
24 lines
592 B
TOML
[package]
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name = "rustc_transmute"
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version = "0.0.0"
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edition = "2024"
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[dependencies]
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# tidy-alphabetical-start
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itertools = "0.12"
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rustc_abi = { path = "../rustc_abi", optional = true }
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rustc_data_structures = { path = "../rustc_data_structures" }
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rustc_hir = { path = "../rustc_hir", optional = true }
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rustc_middle = { path = "../rustc_middle", optional = true }
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rustc_span = { path = "../rustc_span", optional = true }
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smallvec = "1.8.1"
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tracing = "0.1"
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# tidy-alphabetical-end
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[features]
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rustc = [
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"dep:rustc_abi",
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"dep:rustc_hir",
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"dep:rustc_middle",
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"dep:rustc_span",
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]
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