[Webkit-unassigned] [Bug 251330] New: [Wasm-GC] Support arrays of vectors

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=251330

            Bug ID: 251330
           Summary: [Wasm-GC] Support arrays of vectors
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebAssembly
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: tjc at igalia.com

https://github.com/WebAssembly/gc/blob/main/proposals/gc/MVP.md implies that arrays of vectors should be supported, e.g. the description of `array.new_canon_data`: "t' is numeric, vector, or packed". That implies that `array.get` and `array.set` should work on arrays of vectors. However, this functionality is currently not implemented in the `JSWebAssemblyArray` class (see the implementations of `get()` and `set()`.) The AIR implementations of `array.new_canon` and `array.get` also use `emitCoerceFromI64` on the input or result value, which crashes with an assertion failure when the source type is `v128`.

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