[Webkit-unassigned] [Bug 218331] New: [WASM-References] Modernize reference types support in JSC

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=218331

            Bug ID: 218331
           Summary: [WASM-References] Modernize reference types support in
                    JSC
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dbezhetskov at igalia.com

The JSC uses an outdated version of the reference types proposal, in short ref-types.
Both SpiderMonkey and V8 engines support recent version of ref-types, so to make JSC better we should update it.

JSC implements ref-types version which corresponds the version right before this PR https://github.com/WebAssembly/reference-types/pull/87.

There are a few tasks to do:
1) rename anyref to externref
2) extend JSC wasm parser to parse immediates for ref.null and ref.is_null
3) adapt recent tests from existing implementations (SpiderMonkey and V8)

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