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Showing content from https://docs.rs/wasmtime/latest/wasmtime/enum.RegallocAlgorithm.html below:

RegallocAlgorithm in wasmtime - Rust

#[non_exhaustive]
pub enum RegallocAlgorithm {
    Backtracking,
}

Possible register allocator algorithms for the Cranelift codegen backend.

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Generates the fastest possible code, but may take longer.

This algorithm performs “backtracking”, which means that it may undo its earlier work and retry as it discovers conflicts. This results in better register utilization, producing fewer spills and moves, but can cause super-linear compile runtime.

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