[PATCH] On PPC32 GCC9 or later can throw an ICE when built with older GCCs
Mon Apr 6 23:44:45 GMT 2020
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
Gustavo Romero (1):
Fix use of singleton in optinfo framework
gcc/dumpfile.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
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