[webkit-reviews] review granted: [Bug 200018] Sometimes we miss removable CheckInBounds : [Attachment 374652] Patch
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Mon Jul 22 16:47:51 PDT 2019
Saam Barati <sbarati at apple.com> has granted Justin Michaud
<justin_michaud at apple.com>'s request for review:
Bug 200018: Sometimes we miss removable CheckInBounds
https://bugs.webkit.org/show_bug.cgi?id=200018
Attachment 374652: Patch
https://bugs.webkit.org/attachment.cgi?id=374652&action=review
--- Comment #3 from Saam Barati <sbarati at apple.com> ---
Comment on attachment 374652
--> https://bugs.webkit.org/attachment.cgi?id=374652
Patch
View in context: https://bugs.webkit.org/attachment.cgi?id=374652&action=review
r=me
> Source/JavaScriptCore/ChangeLog:8
> + We failed to remove the CheckInBounds bounds because we did not see
that the index was nonnegative. This is because we do not see the relationship
between the two
> + separate zero constants that appear in the IR for the given test
case. This patch re-adds the hack to de-duplicate m_zero that was removed in
> + <https://trac.webkit.org/changeset/241228/webkit>.
nit: should go below "Reviewed by ..."
Might be worth also opening a bug on not being reliant on the exact node
pointer. Or at least understanding why it's ok to rely on the actual node
pointer value.
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