[Webkit-unassigned] [Bug 189123] [WHLSL] Implement uniform control flow restrictions

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=189123

--- Comment #2 from Myles C. Maxfield <mmaxfield at apple.com> ---
Some standard library functions must never be called in nonuniform control flow.

Right now, we have a definition of "uniform control flow" in the spec which is validated at run-time, not compile-time.

We also (will) have a definition of "control flow which was arrived-at by branching on a non-uniform value" which is validated at compile-time, not run-time. This is currently only used for variables marked "uniform" (which is a totally different thing).

We need to figure out whether or not we can unify these two definitions.

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