https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87162
--- Comment #7 from Wen Yang <yellowriver2010 at hotmail dot com> --- This patch will make it more robust: # git diff diff --git a/gcc/trans-mem.c b/gcc/trans-mem.c index 1d4eb80..326e1c4 100644 --- a/gcc/trans-mem.c +++ b/gcc/trans-mem.c @@ -2099,6 +2099,9 @@ gate_tm_init (void) if (!flag_tm) return false; + if (!cfun->cfg) + return false; + calculate_dominance_info (CDI_DOMINATORS); bitmap_obstack_initialize (&tm_obstack);