On Sat, Nov 16, 2019 at 06:44:35AM -0500, Jeffrey Walton wrote: > On Sat, Nov 16, 2019 at 6:25 AM Segher Boessenkool > <segher@xxxxxxxxxxxxxxxxxxx> wrote: > > On Fri, Nov 15, 2019 at 08:05:57PM -0500, Jeffrey Walton wrote: > > > g++ -DNDEBUG -g2 -O3 -mcpu=power9 -maltivec -c ppc_power9.cpp > > > > You forgot -Wall -Wextra, or at the very least -Wall. It probably will > > help you find this problem., too. > > OK, thanks. > > I have a comprehensive test script that does things like -Wall > -Wextra. It takes 4 to 6 hours to run. It is not suitable for Travis, > though. You should have warnings enabled *always*. It does not take extra time, not measurable anyway. The point is that the compiler will tell you about likely errors you made, right after you made them, so it is easy to correct then, and a huge time saver. And if the compiler think that something may be wrong, but it really all is perfectly fine, perhaps the code should be written in such a way that this is more clear. If you still think it is a compiler bug, please file a bug in bugzilla, with a testcase that reproduces the problem, so that we can investigate (instead of guess). Segher
