https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72778
--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> --- The fix is not complete, I still get bootstrap failure with the above ICE when building libgo with compiler, configured with "--with-arch=core-avx-i --with-cpu=core-avx-i". To be attached preprocessed source illustrates the problem. ./cc1 -O2 -fplan9-extensions -fexceptions -fnon-call-exceptions -march=core-avx2 -fpreprocessed -quiet sema.i /home/uros/gcc-svn/trunk/libgo/runtime/sema.goc: In function ‘sync_runtime_notifyListAdd’: /home/uros/gcc-svn/trunk/libgo/runtime/sema.goc:347:1: internal compiler error: in create_pre_exit, at mode-switching.c:451 ^ 0x12a6e8e create_pre_exit /home/uros/gcc-svn/trunk/gcc/mode-switching.c:437 0x12a6e8e optimize_mode_switching /home/uros/gcc-svn/trunk/gcc/mode-switching.c:534 0x12a6e8e execute /home/uros/gcc-svn/trunk/gcc/mode-switching.c:892 0xe475fd rest_of_handle_insert_vzeroupper /home/uros/gcc-svn/trunk/gcc/config/i386/i386.c:2685 0xe475fd execute /home/uros/gcc-svn/trunk/gcc/config/i386/i386.c:4068 Please submit a full bug report, ...