https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87162

--- Comment #6 from Wen Yang <yellowriver2010 at hotmail dot com> ---
We may simply construct this error scenario:

#
/var/weny/release_gcc_trunk/usr/local/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/cc1
 -fdump-passes -fgnu-tm  applets.i

This section of code has a bug:

static bool
gate_tm_init (void)
{
  if (!flag_tm)
    return false;

  calculate_dominance_info (CDI_DOMINATORS);  ---》cfun may be NULL.

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