[Webkit-unassigned] [Bug 69702] JSVALUE32_64 DFG JIT - Bug fixes for Branch and LogicalNot

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Sat Oct 8 12:36:06 PDT 2011


Filip Pizlo <fpizlo at apple.com> changed:

           What    |Removed                     |Added
 Attachment #110271|review?, commit-queue?      |review+, commit-queue+
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--- Comment #2 from Filip Pizlo <fpizlo at apple.com>  2011-10-08 12:36:06 PST ---
(From update of attachment 110271)
View in context: https://bugs.webkit.org/attachment.cgi?id=110271&action=review

> Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp:560
>      speculationCheck(m_jit.branch32(MacroAssembler::NotEqual, valueTagGPR, TrustedImm32(JSValue::UndefinedTag)));

It's sad that we need two branches here. :-(  But I think that we can optimize this later; more important is that your version is safer and more likely to be correct.

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