Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 2f82f9ba319643e6752f5055b6b1f92056c9429d
https://github.com/WebKit/WebKit/commit/2f82f9ba319643e6752f5055b6b1f92056c9429d
Author: Angelos Oikonomopoulos <[email protected]>
Date: 2025-04-04 (Fri, 04 Apr 2025)
Changed paths:
M Source/JavaScriptCore/wasm/WasmBBQJIT.cpp
Log Message:
-----------
Fix corner case in BBQJIT LRU usage
https://bugs.webkit.org/show_bug.cgi?id=290990
Reviewed by Yusuke Suzuki.
BBQJIT::increaseKey post-increments m_lastUseTimestamp (which starts out
as zero), so for the first even use, it sets the use timestamp to zero.
Since we initialize timestamps to zero, this ends up discarding the use.
This fixes a couple of wasm-bbq-no-consts test failures on 32-bits,
where the first even use was in an instruction that needed to load both
operands. Since the first use wasn't counted, we ended up picking the
same register for loading both operands.
* Source/JavaScriptCore/wasm/WasmBBQJIT.cpp:
(JSC::Wasm::BBQJITImpl::BBQJIT::increaseKey):
Canonical link: https://commits.webkit.org/293224@main
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