Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: dda4fc219fa7543f30a49a1ea394188114f94017
https://github.com/WebKit/WebKit/commit/dda4fc219fa7543f30a49a1ea394188114f94017
Author: Yusuke Suzuki <[email protected]>
Date: 2022-12-10 (Sat, 10 Dec 2022)
Changed paths:
M Source/JavaScriptCore/b3/air/AirAllocateRegistersByGraphColoring.cpp
Log Message:
-----------
[JSC] Make Move32 elimination more optimistic
https://bugs.webkit.org/show_bug.cgi?id=249086
rdar://103218582
Reviewed by Justin Michaud.
We are not removing Move32 if arg0's def is more than 32bit or arg1's use is
more than 32bit.
But we do not need to make it super conservative. This patch relaxes this
condition so that
we avoid optimization only when the arg0's def is more than 32bit. So, we can
allow removing
Move32 where source-def is 32bit and destination-use is 64bit.
This improves JetStream2 by 0.45% with 98% confidence.
* Source/JavaScriptCore/b3/air/AirAllocateRegistersByGraphColoring.cpp:
Canonical link: https://commits.webkit.org/257694@main
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