[Bug middle-end/40106] Time increase for the Polyhedron test air.f90 due to bad optimization

[dominiq at lps dot ens dot fr]

------- Comment #20 from dominiq at lps dot ens dot fr  2009-08-28 07:19 -------
It it helps, I get for the reduced test with the line 94:

[ibook-dhum] lin/test% gfc -m64 -O2 -funsafe-math-optimizations
-fno-signed-zeros -fno-trapping-math -fno-associative-math -fno-reciprocal-math
air_db.f90
[ibook-dhum] lin/test% time a.out > /dev/null                                  
                                                                      4.555u
0.016s 0:04.57 99.7%       0+0k 0+2io 0pf+0w

without it

[ibook-dhum] lin/test% gfc -m64 -O2 -funsafe-math-optimizations
-fno-signed-zeros -fno-trapping-math -fno-associative-math -fno-reciprocal-math
air_db.f90
[ibook-dhum] lin/test% time a.out > /dev/null                                  
                                                                      6.632u
0.020s 0:06.66 99.8%       0+0k 0+0io 0pf+0w


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40106