[webkit-changes] [WebKit/WebKit] dc8ed1: [WGSL] Add support for index access on packed types

[Tadeu Zagallo]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: dc8ed15466fe404be6683cf630b404353a82ae81
      https://github.com/WebKit/WebKit/commit/dc8ed15466fe404be6683cf630b404353a82ae81
  Author: Tadeu Zagallo <tzagallo at apple.com>
  Date:   2023-06-14 (Wed, 14 Jun 2023)

  Changed paths:
    M Source/WebGPU/WGSL/GlobalVariableRewriter.cpp
    M Source/WebGPU/WGSL/tests/valid/packing.wgsl

  Log Message:
  -----------
  [WGSL] Add support for index access on packed types
https://bugs.webkit.org/show_bug.cgi?id=258011
rdar://110698705

Reviewed by Mike Wyrzykowski.

During global variable rewriting, determine the resulting packing of an index access.
This is most often unpacked, but important when accessing an array of packed structs.

* Source/WebGPU/WGSL/GlobalVariableRewriter.cpp:
(WGSL::RewriteGlobalVariables::pack):
(WGSL::RewriteGlobalVariables::getPacking):
* Source/WebGPU/WGSL/tests/valid/packing.wgsl:

Canonical link: https://commits.webkit.org/265150@main