[Bug tree-optimization/92924] [10 regression] reproducible indirect call profile merging causes 80% slowdown in Firefox pref-reftest-singletons id-getter microbenchmarks

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92924

--- Comment #22 from Martin Liška <marxin at gcc dot gnu.org> ---
For GCC I see the frequency of only one target aligned:

== Stats for before ==
stats for indirect_call:
  total: 9210 freq: 5943636909
  not executed at all: 6249
  invalid: 669 (7.26%) freq:2219809025 (37.35%)
  only one target: 1786 (19.39%) freq:2260086892 (38.03%)
  useful values (with not one target):
    0 values:       23 times (0.25%) freq:    48191810 (0.81%)
    1 values:      271 times (2.94%) freq:  1136761204 (19.13%)
    2 values:      180 times (1.95%) freq:   200890480 (3.38%)
    3 values:       32 times (0.35%) freq:    77897498 (1.31%)
    4 values:        0 times (0.00%) freq:           0 (0.00%)

Top 10 invalid counters:
  freq: 10.25%: [609379302, 0, -1, 0, 0, 0, 0, 0, 0]
  freq: 5.46%: [324403834, 0, -1, 0, 0, 0, 0, 0, 0]
  freq: 2.91%: [172847042, 0, -1, 0, 0, 0, 0, 0, 0]
  freq: 1.71%: [101514216, 0, -1, 0, 0, 0, 0, 0, 0]
  freq: 1.34%: [79624322, 0, -1, 0, 0, 0, 0, 0, 0]
  freq: 0.94%: [55632805, 0, -1, 0, 0, 0, 0, 0, 0]
  freq: 0.94%: [55597131, 0, -1, 0, 0, 0, 0, 0, 0]
  freq: 0.94%: [55597131, 0, -1, 0, 0, 0, 0, 0, 0]
  freq: 0.84%: [49651232, 0, -1, 0, 0, 0, 0, 0, 0]
  freq: 0.83%: [49464348, 0, -1, 0, 0, 0, 0, 0, 0]


stats for topn:
  total: 1514 freq: 1761607630
  not executed at all: 1030
  invalid: 194 (12.81%) freq:1013865281 (57.55%)
  only one target: 149 (9.84%) freq:362258875 (20.56%)
  useful values (with not one target):
    0 values:        9 times (0.59%) freq:     4461379 (0.25%)
    1 values:       75 times (4.95%) freq:   287705112 (16.33%)
    2 values:       50 times (3.30%) freq:    91245278 (5.18%)
    3 values:        7 times (0.46%) freq:     2071705 (0.12%)
    4 values:        0 times (0.00%) freq:           0 (0.00%)

Top 10 invalid counters:
  freq: 27.67%: [487364997, 0, -1, 0, 0, 0, 0, 0, 0]
  freq: 3.84%: [67628999, 0, -1, 0, 0, 0, 0, 0, 0]
  freq: 3.40%: [59963262, 0, -1, 0, 0, 0, 0, 168, 10778]
  freq: 2.48%: [43755335, 0, -1, 0, 0, 0, 0, 0, 0]
  freq: 2.40%: [42351035, 0, -1, 0, 0, 0, 0, 0, 0]
  freq: 1.31%: [23145472, 0, -1, 0, 0, 0, 0, 0, 0]
  freq: 1.27%: [22324265, 0, -1, 0, 0, 0, 0, 0, 0]
  freq: 1.06%: [18684932, 0, -1, 0, 0, 0, 0, 0, 0]
  freq: 1.05%: [18472316, 0, -1, 0, 0, 0, 0, 0, 0]
  freq: 1.00%: [17554178, 0, -1, 0, 0, 8, 8986, 0, 0]

== Stats for norepro/ ==
stats for indirect_call:
  total: 9210 freq: 5943646470
  not executed at all: 6249
  invalid: 0 (0.00%) freq:0 (0.00%)
  only one target: 1786 (19.39%) freq:2260089402 (38.03%)
  useful values (with not one target):
    0 values:      132 times (1.43%) freq:  1348815836 (22.69%)
    1 values:      571 times (6.20%) freq:  1909318242 (32.12%)
    2 values:      407 times (4.42%) freq:   294668554 (4.96%)
    3 values:       65 times (0.71%) freq:   130754436 (2.20%)
    4 values:        0 times (0.00%) freq:           0 (0.00%)

stats for topn:
  total: 1514 freq: 1761608637
  not executed at all: 1030
  invalid: 0 (0.00%) freq:0 (0.00%)
  only one target: 149 (9.84%) freq:362258979 (20.56%)
  useful values (with not one target):
    0 values:       76 times (5.02%) freq:   634460484 (36.02%)
    1 values:      156 times (10.30%) freq:   592617317 (33.64%)
    2 values:       84 times (5.55%) freq:   152569156 (8.66%)
    3 values:       17 times (1.12%) freq:    19702684 (1.12%)
    4 values:        2 times (0.13%) freq:          17 (0.00%)