[Webkit-unassigned] [Bug 151315] If B3->Air lowering moves a child to the result tmp when using an Inst with a x86-style UseDef operand, then other uses of that child should also use the result tmp

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=151315

--- Comment #1 from Filip Pizlo <fpizlo at apple.com> ---
LOL, I picked a bad example.  We have special-case handling of Shl(x, 1), and Add(x, x) turns into Shl(x, 1). That handling already does the right thing.

But this same issue arises for Mul, for example.

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