Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 7fa06d6a9b3d7e5d8ed5109310e1168678594948
https://github.com/WebKit/WebKit/commit/7fa06d6a9b3d7e5d8ed5109310e1168678594948
Author: Yusuke Suzuki <[email protected]>
Date: 2025-03-01 (Sat, 01 Mar 2025)
Changed paths:
M Source/JavaScriptCore/bytecode/InlineCacheCompiler.h
M Source/JavaScriptCore/jit/JITOperations.cpp
M Source/JavaScriptCore/runtime/StringPrototype.cpp
M Source/JavaScriptCore/runtime/Structure.h
Log Message:
-----------
[JSC] Relax megamorphic IC condition for 2 digits integers
https://bugs.webkit.org/show_bug.cgi?id=288927
rdar://145934723
Reviewed by Mark Lam.
This patch relaxes disabling megamorphic IC when it encounters 2-digits
integer strings as keys. When using an object, there is a legit chance
that integers are also used for keys. So let's not pessimise the IC when
(1) an object is already a cacheable dictionary or (2) key is 2-digit
integer string.
* Source/JavaScriptCore/bytecode/InlineCacheCompiler.h:
(JSC::canUseMegamorphicGetByIdExcludingIndex):
(JSC::canUseMegamorphicGetById):
* Source/JavaScriptCore/jit/JITOperations.cpp:
(JSC::getByValMegamorphic):
* Source/JavaScriptCore/runtime/StringPrototype.cpp:
(JSC::replaceUsingRegExpSearchWithCache):
* Source/JavaScriptCore/runtime/Structure.h:
(JSC::Structure::isCacheableDictionary const):
Canonical link: https://commits.webkit.org/291471@main
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