https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82246
--- Comment #2 from erwan.adam at cea dot fr --- (In reply to Andrew Pinski from comment #1) > Taking the address of array [-1] is undefined according to the c standard. Hi Andrew, Thanks for you answer. Strictly speaking, I don't access directly array[-1]. It will be the case if I have written _container(&data[-offset]). In my case, I write _container(data-offset) and after I always take indexes >= offset to access _container values. Doing that, neither valgrind or sanitize complains. Moreover, this piece of code works perfectly if CIS_data is allocated in the heap via a double* CIS_data = new double[1]; and once again, neither valgrind or sanitize complains. I possible, could you point me a link where I can find more informations about this particular point ? E.A.
