Bug 254695

Summary:	[Wasm-GC] Add nullexternref and nullfuncref types
Product:	WebKit	Reporter:	Asumu Takikawa <asumu>
Component:	WebAssembly	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified
See Also:	https://bugs.webkit.org/show_bug.cgi?id=258219
Bug Depends on:
Bug Blocks:	247394

Description Asumu Takikawa 2023-03-29 14:55:17 PDT

Because the Wasm GC proposal has three separate reference hierarchies (extern, any, func) since https://github.com/WebAssembly/gc/issues/307 was resolved, and they each need a distinct bottom type.

JSC currently implements nullref which is the bottom type for the any hierarchy. The other two bottom types need to be added as well.

Comment 1 Radar WebKit Bug Importer 2023-04-05 14:56:17 PDT

<rdar://problem/107680093>

Comment 2 Asumu Takikawa 2023-08-07 09:59:01 PDT

Pull request: https://github.com/WebKit/WebKit/pull/16442

Comment 3 EWS 2023-08-10 10:08:33 PDT

Committed 266766@main (697f8d5c0fdd): <https://commits.webkit.org/266766@main>

Reviewed commits have been landed. Closing PR #16442 and removing active labels.