[Bug fortran/51267] loop optimization error using LOC function

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51267

--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2011-11-22 21:03:51 UTC ---
> -fno-tree-ds seems to do the trick:

sorry, it is -fno-tree-dse and

> -ftree-dse
> Perform dead store elimination (DSE) on trees. A dead store is a store into a memory location 
> which will later be overwritten by another store without any intervening loads. 
> In this case the earlier store can be deleted. This flag is enabled by default at -O and higher. 

(it makes more sense;-).