Hi, I just updated to 4.4.1 and now one of my unit tests fails when it is compiled with -O3. OTOH when I compile with -O2 -finline-functions -funswitch-loops -ftree- vectorize -fpredictive-commoning -fgcse-after-reload -fipa-cp-clone the resulting binary does not fail. I looked at the Assembly with objdump -dwC and I can see at least that the -O3 compiled binary has some loop unrolling done that's not in the other binary. The gcc manual says that -O3 is the same as -O2 plus -finline-functions - funswitch-loops -ftree-vectorize -fpredictive-commoning -fgcse-after-reload gcc -c -Q -O3 --help=optimizers compared to the same with -O2 shows that also -fipa-cp-clone goes in that list. But still the result is not the same. Any ideas how to debug this regression further? Regards, Matthias
