[Webkit-unassigned] [Bug 143736] DFG should not insert Phantoms in bytecode parsing or as part of transformations

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=143736

--- Comment #1 from Filip Pizlo <fpizlo at apple.com> ---
I've hit a snag: backwards propagation needs to know when values are used by bytecode in strange ways.  It currently looks like it might rely on Phantom to tell it that the bits of some value are all observed.

Ugh.

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