[Webkit-unassigned] [Bug 188145] Hardcoded LFENCE instruction

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=188145

Filip Pizlo <fpizlo at apple.com> changed:

           What    |Removed                     |Added
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 Attachment #346059|review?                     |review-
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--- Comment #16 from Filip Pizlo <fpizlo at apple.com> ---
Comment on attachment 346059
  --> https://bugs.webkit.org/attachment.cgi?id=346059
Patch

This change is wrong because cpuid is dramatically slower than lfence and because lfence is no longer the way we are mitigating Spectre.  We should just remove all uses of speculationFence() and remove speculationFence().

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