Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 3a144e8081a754700d635475cfae53b2b863fab0
https://github.com/WebKit/WebKit/commit/3a144e8081a754700d635475cfae53b2b863fab0
Author: Yusuke Suzuki <ysuz...@apple.com>
Date: 2024-07-29 (Mon, 29 Jul 2024)
Changed paths:
M Source/JavaScriptCore/b3/air/AirAllocateRegistersByGraphColoring.cpp
M Source/JavaScriptCore/b3/air/AirUseCounts.h
Log Message:
-----------
[JSC] Register allocator should rematerialize constants
https://bugs.webkit.org/show_bug.cgi?id=277197
rdar://132619729
Reviewed by Justin Michaud.
Our register allocator is not implementing rematerialization part of the
original paper: using constant rematerialization when we spill constants.
This patch implements this feature so that we can rematerialize constant.
* Source/JavaScriptCore/b3/air/AirAllocateRegistersByGraphColoring.cpp:
* Source/JavaScriptCore/b3/air/AirUseCounts.h:
(JSC::B3::Air::UseCounts::UseCounts):
(JSC::B3::Air::UseCounts::isConstDef const):
(JSC::B3::Air::UseCounts::constant const):
(JSC::B3::Air::UseCounts::numWarmUsesAndDefs const):
Canonical link: https://commits.webkit.org/281509@main
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