[Bug fortran/51218] [4.7 Regression] Potential optimization bug

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51218

Dominique d'Humieres <dominiq at lps dot ens.fr> changed:

           What    |Removed                     |Added
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                 CC|                            |tkoenig at gcc dot gnu.org

--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2011-11-19 00:03:49 UTC ---
The miscompilation is triggered by -ffrontend-optimize, work-around: use
-fno-frontend-optimize.
Revision 171653 is dealing with the frontend optimization. If I am not
mistaken, it is the only change dealing with frontend optimization after
r171100, although I don't understand how this revision could cause a
miscompilation.

The crash occurs in __mo_dec_matrix_MOD_sum_vector.