• Manos Koukoutos's avatar
    [wasm-gc][turbofan] Implement typing phase · aee0ec97
    Manos Koukoutos authored
    We introduce a typing phase into the Turbofan compilation pipeline for
    wasm-gc. It has two functionalities: (1) to type nodes that were not
    typed during code generation (mainly phi nodes) and (2) to narrow types
    as much as possible.
    The following nodes are handled, which should be enough for our
    purposes: TypeGuard, WasmTypeCast, AssertNotNull, Phi, LoadFromObject,
    and LoadImmutableFromObject.
    Loop phi types are computed by first assigning the type of the
    non-recursive input, and updating once we have the type of the recursive
    inputs, and repeating this process to a fixed point.
    
    Drive-by: Remove the narrowing of function signatures during wasm
    inlining, as it created some issues and should not be needed after this
    series of changes.
    
    Bug: v8:7748
    Change-Id: I8a72488d5c221c4ae8257fc5abf6f0368cf10e96
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3678208
    Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
    Reviewed-by: 's avatarMaya Lekova <mslekova@chromium.org>
    Reviewed-by: 's avatarJakob Kummerow <jkummerow@chromium.org>
    Cr-Commit-Position: refs/heads/main@{#80912}
    aee0ec97
type-based-optimizations.js 2.77 KB