(In reply to comment #1) > The testcase is invalid C, while x86_64/i?86 will do the expected thing of > doing unaligned loads/stores silently, it won't do that in vectorized code or > for atomic accesses.
Shouldn't the compiler vectorize the code _conservatively_, by generating code to check if the address is aligned or generating unaligned vector load instructions, as any code written for x86_64 will break with -O3, with newer gcc. Also note that, this bug will get triggered only when __restricted is used. If you remove __restricted, gcc is generating proper code. Also it works properly for gcc 4.7 too (even with __restricted). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/953617 Title: gcc tree optimizer generates incorrect vector load instructions for x86_64 To manage notifications about this bug go to: https://bugs.launchpad.net/gcc/+bug/953617/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
