On Mon, 6 Apr 2020, Gustavo Romero via Gcc-patches wrote: > When GCC9 is built with older GCC (4.7) on FreeBSD 32-bit on PowerPC an ICE > is generated on stage 1 when selftests are performed. > > After an investigation the root cause was traced to an unnecessary and > harmful instantiation of a new dump_context singleton class in order to > simply get the current activated instance. > > I was only able to reproduce it on FreeBSD 32-bit but it can affect other > 32-bit OSs in my understanding, and even 64-bit on certain cases I believe, > although I was not able to reproduce it on 64-bit FreeBSD or Linux. > > On FreeBSD 12 32-bit the bug reproduces 100% when GCC9 is built with base > GCC 4.7. For additional details, please see: > > * https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=242506 and > * https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=243666 > > Gustavo Romero (1): > Fix use of singleton in optinfo framework > > gcc/dumpfile.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-)
This sounds like GCC PR87252. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87252 brgds, H-P
