[Bug 109216] 4-27% performance drop in Vulkan benchmarks

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109216

--- Comment #14 from Ian Romanick <idr at freedesktop.org> ---
Created attachment 143048
  --> https://bugs.freedesktop.org/attachment.cgi?id=143048&action=edit
intel/compiler: Try nir_opt_if once before nir_opt_peephole_select

Modifying opt_peel_loop_initial_if to work on bcsel in an manner similar to how
it operates on if-statements (i.e., moving all of the instructions that are
only used to support the sources of the bcsel to the end of the loop) is going
to be non-trivial.  In the mean time, this fixes the problem in the small test
case that I supplied.  As soon as it's done running through the CI, I will
submit an MR.

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