[webkit-changes] [WebKit/WebKit] 113f84: Decompress the previous sibling and renderer point...

[David Degazio]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 113f84cbe25484e4cb4f167259c65e6200b651be
      https://github.com/WebKit/WebKit/commit/113f84cbe25484e4cb4f167259c65e6200b651be
  Author: David Degazio <d_degazio at apple.com>
  Date:   2024-11-19 (Tue, 19 Nov 2024)

  Changed paths:
    M Source/WebCore/cssjit/SelectorCompiler.cpp
    M Source/WebCore/dom/Node.cpp
    M Source/WebCore/dom/Node.h
    M Source/WebCore/dom/NodeRareData.cpp
    M Source/WebCore/domjit/JSNodeDOMJIT.cpp
    M Source/WebCore/rendering/RenderObject.cpp
    M Source/WebCore/rendering/RenderObject.h

  Log Message:
  -----------
  Decompress the previous sibling and renderer pointers in WebCore::Node
https://bugs.webkit.org/show_bug.cgi?id=281997
rdar://138409833

Reviewed by Ryosuke Niwa.

Makes use of some currently unused padding bytes in WebCore::Node to
decompress two CompactPointerTuple fields, simplifying access to these
fields without increasing the memory footprint of Node itself.

* Source/WebCore/cssjit/SelectorCompiler.cpp:
(WebCore::SelectorCompiler::SelectorCodeGenerator::generateWalkToPreviousAdjacentElement):
* Source/WebCore/dom/Node.cpp:
(WebCore::Node::~Node):
* Source/WebCore/dom/Node.h:
(WebCore::Node::previousSibling const):
(WebCore::Node::protectedPreviousSibling const):
(WebCore::Node::previousSiblingMemoryOffset):
(WebCore::Node::setPreviousSibling):
(WebCore::Node::renderer const):
(WebCore::Node::hasElementStateFlag const):
(WebCore::Node::styleBitfields const):
(WebCore::Node::setStyleBitfields):
(WebCore::Node::setElementStateFlag const):
(WebCore::Node::previousSiblingPointerMask): Deleted.
* Source/WebCore/dom/NodeRareData.cpp:
* Source/WebCore/domjit/JSNodeDOMJIT.cpp:
(WebCore::compileNodePreviousSiblingAttribute):
* Source/WebCore/rendering/RenderObject.cpp:
* Source/WebCore/rendering/RenderObject.h:
(WebCore::Node::setRenderer):

Canonical link: https://commits.webkit.org/286827@main



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