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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - B3 should have store elimination"
href="https://bugs.webkit.org/show_bug.cgi?id=154658#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - B3 should have store elimination"
href="https://bugs.webkit.org/show_bug.cgi?id=154658">bug 154658</a>
from <span class="vcard"><a class="email" href="mailto:fpizlo@apple.com" title="Filip Pizlo <fpizlo@apple.com>"> <span class="fn">Filip Pizlo</span></a>
</span></b>
<pre>The main issue here is doing backward dominators: if we have @s = Store(@x, @p) and @t = Store(@y, @p) then we can eliminate @s if it is backward dominated by @t and there does not exist a path from @s to @t that could observe the store.
On the other hand, maybe you could just do this by forward flow. If you do forward flow from @s and we find any number of @t's without ever hitting a side exit, return, read or write, then we can eliminate @s.</pre>
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