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;-).
