https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83758
--- Comment #19 from Alexandre Oliva <aoliva at gcc dot gnu.org> --- I was copied, presumably because the problem occurred in var-tracking. I've tried to duplicate the problem on gcc112. I bootstrapped the trunk (without any --with-cpu flag), and then build attachment 43208 with stage3: $ ./gccgo -B./ -I../../libgo/go -I../powerpc64le-unknown-linux-gnu/libgo -I../powerpc64le-unknown-linux-gnu/libgo/go -O2 -g t.go -mcpu=power8 -c [success] Given this, I conclude that the problem only occurs if the compiler is bootstrapped --with-cpu=power[89]. This suggests to me that, although the ICE is triggered in var-tracking, the problem is unlikely to be there: the compiler is getting miscompiled. I suppose that, by now, you already knew that ;-)