[Bug lto/45810] 40% slowdown when using LTO for a single-file program

["dominiq at lps dot ens.fr" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45810

--- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2010-09-30 17:28:19 UTC ---
(In reply to comment #8)
> Using -fno-inline-functions, the program recovers the speed of the no-LTO
> version.

This does not work on powerpc-apple-darwin9:

[karma] lin/test% gfc -Ofast -funroll-loops -fwhole-program -g fatigue.f90
[karma] lin/test% time a.out > /dev/null
15.942u 0.052s 0:16.54 96.6%    0+0k 2+1io 40pf+0w
[karma] lin/test% gfc -Ofast -funroll-loops -fwhole-program -g -flto
fatigue.f90
[karma] lin/test% time a.out > /dev/null
20.330u 0.063s 0:21.06 96.8%    0+0k 0+2io 0pf+0w
[karma] lin/test% gfc -Ofast -funroll-loops -fwhole-program -g -flto
-fno-inline-functions fatigue.f90
[karma] lin/test% time a.out > /dev/null
20.678u 0.063s 0:21.33 97.1%    0+0k 0+2io 0pf+0w
[karma] lin/test% gfc -Ofast -funroll-loops -fwhole-program -g -flto
-finline-limit=600 fatigue.f90
[karma] lin/test% time a.out > /dev/null
10.903u 0.036s 0:11.30 96.7%    0+0k 0+2io 0pf+0w