257949 2023-06-12 00:09:04 -0700 JSC computes incorrectly in DFG 2025-05-23 17:27:20 -0700 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build All All RESOLVED FIXED InRadar P2 Normal --- 259065 271788 1 ChristineWillice yijia_huang anbu1024 clopez commit-queue mark.lam webkit-bug-importer ysuzuki oldest_to_newest 1960987 0 ChristineWillice 2023-06-12 00:09:04 -0700 ``````````````test.js````````````````` function opt(v) { return ((-1 >>> v) + -0.2) | 0 } for (let i = 0; i < 100; i++) { opt(0) } print(opt(32)) `````````````````````````````````````` This bug is in latest version JSC. Run args: ./jsc test.js --useConcurrentJIT=0 --jitPolicyScale=0 The corrent result is -2, but JSC prints -1. 1961121 1 ap 2023-06-12 13:07:16 -0700 Reproduces on Apple Silicon macOS, too. 1961122 2 webkit-bug-importer 2023-06-12 13:07:27 -0700 <rdar://problem/110661900> 1963710 3 justin_michaud 2023-06-26 18:54:22 -0700 Pull request: https://github.com/WebKit/WebKit/pull/15311 1965487 4 ews-feeder 2023-07-06 20:50:07 -0700 Committed 265833@main (2f7262436c99): <https://commits.webkit.org/265833@main> Reviewed commits have been landed. Closing PR #15311 and removing active labels. 1965992 5 commit-queue 2023-07-10 12:13:27 -0700 Re-opened since this is blocked by bug 259065 1966180 6 clopez 2023-07-11 06:39:17 -0700 BTW, this also caused crashes on the kraken benchmark (on GTK/WPE 64-bits builds). For example when running it with the run-benchmark tool like: Tools/Scripts/run-benchmark --plan kraken [...] Crash log: http://sprunge.us/ZhSWj6 2022180 7 yijia_huang 2024-03-19 10:17:00 -0700 Pull request: https://github.com/WebKit/WebKit/pull/26024 2023781 8 ews-feeder 2024-03-25 07:34:18 -0700 Committed 276654@main (f5b95a221c2e): <https://commits.webkit.org/276654@main> Reviewed commits have been landed. Closing PR #26024 and removing active labels. 2024264 9 commit-queue 2024-03-27 13:04:14 -0700 Re-opened since this is blocked by bug 271788 2026376 10 yijia_huang 2024-04-05 14:31:12 -0700 Pull request: https://github.com/WebKit/WebKit/pull/26913 2028278 11 ews-feeder 2024-04-13 03:56:46 -0700 Committed 277456@main (6c214dfbb5a1): <https://commits.webkit.org/277456@main> Reviewed commits have been landed. Closing PR #26913 and removing active labels. 2119461 12 ysuzuki 2025-05-23 17:27:20 -0700 *** Bug 265272 has been marked as a duplicate of this bug. ***