[Bug target/57796] AVX2 gather vectorization: code bloat and reduction of performance

[vincenzo.innocente at cern dot ch]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57796

--- Comment #8 from vincenzo Innocente <vincenzo.innocente at cern dot ch> ---
My understanding of the gather latency is that it essentially corresponds to a
load per cacheline: fast if all items are closeby, slower than scalar loads if
items are all in different cachelines. Not sure how this can be turned in a
"cost model"