https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119108
--- Comment #3 from Matthew Malcomson <matmal01 at gcc dot gnu.org> --- I only looked into VecSource/5/2, and unfortunately I looked into it on an internal setup that compiles slightly differently. In that slightly different compilation I noticed that `FindMatchLengthPlain` was affected by the patch, and perf pointed to extra branch mispredictions on the changed code. This was particularly noticeable in that different compilation since `FindMatchLengthPlain` was not inlined. Am currently looking to reproduce that finding with upstream sources so it's more useful than hearsay.
