[Bug rtl-optimization/105747] Scheduler can take a long time on arm-linux sometimes

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105747

--- Comment #9 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to David Binderman from comment #8)
> (In reply to David Binderman from comment #7)
> > Created attachment 53119 [details]
> > C source code
> > 
> > Another one. Over 15 minutes this time.
> 
> Flag -O2 required.

Runs in 21 minutes on an RP3.

dcb@raspberrypi:~/csmith $ (ulimit -t 1800;time /home/dcb/gcc/results/bin/gcc
-I/home/dcb/csmith/results/include/csmith-2.3.0/
 -c -g -w -O2    -freport-bug -ftime-report destDir/testFile.23139.c )

Time variable                                   usr           sys          wall
          GGC
 phase parsing                      :   0.77 (  0%)   1.55 ( 33%)   2.31 (  0%)
 3597k (  2%)
 phase opt and generate             :1261.54 (100%)   3.05 ( 66%)1267.62 (100%)
  188M ( 97%)
 callgraph functions expansion      :1212.97 ( 96%)   2.24 ( 48%)1218.13 ( 96%)
  179M ( 93%)
 callgraph ipa passes               :  47.88 (  4%)   0.79 ( 17%)  48.78 (  4%)
 4512k (  2%)
 alias stmt walking                 : 125.32 ( 10%)   0.70 ( 15%) 127.13 ( 10%)
  126k (  0%)
 preprocessing                      :   0.20 (  0%)   0.44 (  9%)   0.58 (  0%)
  941k (  0%)
 lexical analysis                   :   0.25 (  0%)   0.47 ( 10%)   0.87 (  0%)
    0  (  0%)
 parser function body               :   0.23 (  0%)   0.49 ( 11%)   0.68 (  0%)
 1585k (  1%)
 tree operand scan                  :   0.31 (  0%)   0.33 (  7%)   0.71 (  0%)
  830k (  0%)
 tree SSA verifier                  :   3.12 (  0%)   0.10 (  2%)   3.12 (  0%)
    0  (  0%)
 dead store elim2                   :  16.05 (  1%)   0.13 (  3%)  16.30 (  1%)
   62M ( 32%)
 PRE                                :  19.65 (  2%)   0.25 (  5%)  19.90 (  2%)
   46M ( 24%)
 scheduling                         : 865.21 ( 69%)   0.20 (  4%) 867.61 ( 68%)
 4186k (  2%)
 address taken                      :   0.16 (  0%)   0.14 (  3%)   0.22 (  0%)
    0  (  0%)
Extra diagnostic checks enabled; compiler may run slowly.
Configure with --enable-checking=release to disable checks.

real    21m10.578s
user    21m2.776s
sys     0m4.705s