https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56203
--- Comment #6 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot
Uni-Bielefeld.DE> ---
> --- Comment #5 from Joost VandeVondele <Joost.VandeVondele at mat dot
> ethz.ch> ---
> (In reply to r...@cebitec.uni-bielefeld.de from comment #4)
>> This has become more pronounced with increased gfortran testing
>> parallelism. I'll provide more feedback next week.
>
> Maybe post a -ftime-report, I think it might be a compile time hog ? Here, it
> takes about 4s at -O3, the largest single pass is:
>
> alias stmt walking : 1.89 (42%) usr 0.01 (11%) sys 1.95 (42%) wall
>
> 46 kB ( 0%) ggc
>
> The testcase is really not a large program, a handwritten 300 lines of code,
> working on small arrays.
I've tested on two systems with -O3 -fomit-frame-pointer:
* 1.2 GHz UltraSPARC-T2:
real 1:34.16
user 1:33.32
sys 0.43
phase opt and generate : 93.17 (99%) usr 0.40 (95%) sys 93.58 (99%) wall
31673 kB (93%) ggc
alias stmt walking : 30.76 (33%) usr 0.03 ( 7%) sys 30.84 (33%) wall
25 kB ( 0%) ggc
* 1.35 GHz UltraSPARC-IV:
real 49.37
user 44.41
sys 0.47
phase opt and generate : 44.40 (99%) usr 0.33 (97%) sys 47.62 (99%) wall
31673 kB (93%) ggc
alias stmt walking : 12.93 (29%) usr 0.02 ( 6%) sys 13.05 (27%) wall
25 kB ( 0%) ggc
Rainer
