https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114855
--- Comment #20 from Andrew Macleod <amacleod at redhat dot com> --- I did an -O2 run after those patches. Highlights: tree SSA incremental : 117.74 ( 1%) 0.63 ( 3%) 120.37 ( 1%) 1049M ( 24%) dominator optimization : 680.49 ( 5%) 0.65 ( 4%) 686.40 ( 5%) 170M ( 4%) backwards jump threading :11253.23 ( 90%) 9.15 ( 49%)11332.34 ( 90%) 1332M ( 30%) TOTAL :12520.81 18.54 12622.54 4459M I suspect most of dom is the over and over edge recalculations, but I don't actually know that. I do know that most of the 200 seconds at -O1 is, so it seems a reasonable guess. the backwards threader I can't comment on, but time would be rational if that were fixed.
