Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 2ea46ab90e6511139bfb94415205038b672381e0
https://github.com/WebKit/WebKit/commit/2ea46ab90e6511139bfb94415205038b672381e0
Author: Yusuke Suzuki <[email protected]>
Date: 2024-08-07 (Wed, 07 Aug 2024)
Changed paths:
M Source/JavaScriptCore/b3/air/AirAllocateRegistersByGraphColoring.cpp
M Source/JavaScriptCore/dfg/DFGOSRExit.cpp
M Source/JavaScriptCore/ftl/FTLOSRExitCompiler.cpp
Log Message:
-----------
[JSC] Attempt to convert Move32 to Move in ARM64
https://bugs.webkit.org/show_bug.cgi?id=277744
rdar://133394615
Reviewed by Keith Miller.
We found that we are emitting Move32 unnecessarily when the destination said
that the value is ZeroDefed.
We are doing so since x86_64 prefers Move32. But on ARM64, Move32 is more
costly than Move. So we add opposite
optimization which attempts to make Move32 to Move (we already have
optimization making Move to Move32 for x86_64).
We also fixes an issue in FTLOSRExitCompiler's logging introduced in
281831@main.
* Source/JavaScriptCore/b3/air/AirAllocateRegistersByGraphColoring.cpp:
* Source/JavaScriptCore/ftl/FTLOSRExitCompiler.cpp:
(JSC::FTL::compileStub):
Canonical link: https://commits.webkit.org/281959@main
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