The only role of the while_icmp at the end of a NIR loop is to make continue
jumps work. If, after emitting the loop, we learn that there are no continues,
there is no need to insert a while_icmp since it would be a no-op anyway.
total instructions in shared programs: 1764311 -> 1764199 (<.01%)
instructions in affected programs: 26321 -> 26209 (-0.43%)
helped: 82
HURT: 0
Instructions are helped.
total bytes in shared programs: 11609978 -> 11609306 (<.01%)
bytes in affected programs: 178842 -> 178170 (-0.38%)
helped: 82
HURT: 0
Bytes are helped.
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25052>
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