Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: b4d99e644e12f78fe4c1e71edea6aab37ead4450
https://github.com/WebKit/WebKit/commit/b4d99e644e12f78fe4c1e71edea6aab37ead4450
Author: Yusuke Suzuki <[email protected]>
Date: 2023-05-18 (Thu, 18 May 2023)
Changed paths:
M Source/JavaScriptCore/bytecode/InlineCacheCompiler.cpp
M Source/JavaScriptCore/jit/AssemblyHelpers.cpp
M Source/JavaScriptCore/jit/JITOperations.cpp
M Source/JavaScriptCore/runtime/Structure.cpp
M Source/JavaScriptCore/runtime/Structure.h
M Source/JavaScriptCore/runtime/StructureInlines.h
Log Message:
-----------
[JSC] Extend megamorphic store cache with invalidating replacement watchpoint
set
https://bugs.webkit.org/show_bug.cgi?id=256943
rdar://109493502
Reviewed by Justin Michaud.
This patch recovers regression in JetStream2/typescript after introducing
megamorphic store cache.
The reason is that the previous cache was a bit too conservative, and we are
using slow path for
Structure::isWatchingReplacement case, but JetStream2/typescript includes legit
use of this kind of
Structure with megamorphic cache.
This patch allows Structure::isWatchingReplacement case, and invalidate
replacement watchpoint when
caching replace structure. This recovers and rather improves
JetStream2/typescript.
* Source/JavaScriptCore/bytecode/InlineCacheCompiler.cpp:
(JSC::InlineCacheCompiler::regenerate):
* Source/JavaScriptCore/jit/AssemblyHelpers.cpp:
(JSC::AssemblyHelpers::storeMegamorphicProperty):
* Source/JavaScriptCore/jit/JITOperations.cpp:
(JSC::putByIdMegamorphic):
Canonical link: https://commits.webkit.org/264212@main
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