On Tue, Jan 27, 2009 at 11:35 AM, Paolo Bonzini <bonz...@gnu.org> wrote: >>>> Not for PTA though ;) >>> Care to expand? >> >> PTA tracks points-to-NULL as pointing to "nothing". >> This probably should be conditional on -fdelete-null-pointer-checks. >> Otherwise *NULL and *anything won't alias. > > Yes, you're right. I'll see if I can construct a testcase and a patch.
Thanks. > BTW, I was thinking of not doing the optimization anyway on volatile > pointers. What do you think? It should be taken care of automatically by loading it from memory before each dereference, no? Richard. > Paolo >
