Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 06d9f3e926cd6daa7cb51028c74bc1483bfef74e
https://github.com/WebKit/WebKit/commit/06d9f3e926cd6daa7cb51028c74bc1483bfef74e
Author: Angelos Oikonomopoulos <[email protected]>
Date: 2026-02-09 (Mon, 09 Feb 2026)
Changed paths:
M Source/cmake/WebKitCompilerFlags.cmake
Log Message:
-----------
[JSC] Work around GCC miscompilation in testmasm
https://bugs.webkit.org/show_bug.cgi?id=307056
Reviewed by Justin Michaud.
It seems that GCC miscompiles the switch statement in
testMoveConditionallyFloatingPointSameArg when -funswitch-loops is on
(that's the case for -O3). The symptom is that we don't handle
MacroAssembler::DoubleEqualAndOrdered (at least) and end up hitting the
following RELEASE_ASSERT_NOT_REACHED();.
Globally turn off this specific transformation when compiling with older
versions of GCC, to avoid running into further hard-to-diagnose bugs.
Canonical link: https://commits.webkit.org/307067@main
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