[Bug 76862] clamp with bounds inside [0, 1] generates slow code

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76862

--- Comment #1 from Matt Turner <mattst88 at gmail.com> ---
Are you thinking this should be implemented in src/glsl? There's no IR for
saturate. We emit saturate modifiers for clamp(x, 0.0, 1.0) in the i965
backend.

I think the IR should grow an ir_unop_saturate operation.

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