Bug 255002

Summary:	[ANGLE] Speculative fix for div-by-zero in DispatchCompute
Product:	WebKit	Reporter:	Dan Glastonbury <djg>
Component:	ANGLE	Assignee:	Dan Glastonbury <djg>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	dino, kbr, kkinnunen, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	Other
Hardware:	Unspecified
OS:	Unspecified

Description Dan Glastonbury 2023-04-04 12:26:54 PDT

On some CPU configurations, divide-by-zero raises an exception. To avoid
dividing by zero on devices that don't have non-uniform dispatch, clamp
numThreads between 1 and threadExecutionWidth.

Comment 1 Dan Glastonbury 2023-04-04 12:27:38 PDT

rdar://problem/106789544

Comment 2 Dan Glastonbury 2023-04-04 12:32:30 PDT

Pull request: https://github.com/WebKit/WebKit/pull/12388

Comment 3 EWS 2023-04-04 22:07:55 PDT

Committed 262609@main (e6c30af4dc92): <https://commits.webkit.org/262609@main>

Reviewed commits have been landed. Closing PR #12388 and removing active labels.