https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101839
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[9/10/11/12 Regression] |[9/10/11/12 Regression]
|Hand in C++ code with |Hang in C++ code with
|-fdevirtualize |-fdevirtualize
Known to fail| |10.3.0, 11.2.1, 7.5.0,
| |9.4.0
Target Milestone|--- |9.5
Priority|P3 |P2
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
BA::fill can be declared virtual without any change (it is implicitely so as
stated by the C++ standard it seems).
With GCC 11 and -O -fdevirtualize the program crashes and we see
void {anonymous}::BA::fill (struct BA * const this, struct Buf & buf)
{
<bb 2> [count: 0]:
__builtin_unreachable ();
which is from
a-t.C.083i.inline:t.C:16:14: optimized: folding virtual function call to
__builtin_unreachable
a-t.C.083i.inline:Introduced new external node (void
__builtin_unreachable()/1356).
a-t.C.083i.inline:t.C:17:14: optimized: folding virtual function call to
__builtin_unreachable
