[Bug tree-optimization/90134] ICE in duplicate_eh_regions_1, at except.c:557

[Bug tree-optimization/90134] ICE in duplicate_eh_regions_1, at except.c:557

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90134

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This no longer ICEs on the trunk because DSE does:
  Deleted trivially dead stmt: _14 = fq_13(D)->te;

This was done in r12-248 but I suspect there is a missing trapping check.

This code is all undefined anyways .....

[Bug tree-optimization/90134] ICE in duplicate_eh_regions_1, at except.c:557

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90134

--- Comment #4 from Arseny Solokha <asolokha at gmx dot com> ---
(In reply to Andrew Pinski from comment #3)
> This code is all undefined anyways .....

Yes, but what about unmodified tests from libstdc++? I occasionally hit this
ICE on them too, as shown in comment 2. I've just got it w/

g++-13 -O1 -ftree-parallelize-loops=2 -fno-lifetime-dse -fnon-call-exceptions
--param max-early-inliner-iterations=0 -Ilibstdc++-v3/testsuite/util -c
libstdc++-v3/testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc

which triggers on the same code from include/g++-v13/bits/stl_uninitialized.h

[Bug tree-optimization/90134] ICE in duplicate_eh_regions_1, at except.c:557

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90134

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|12.1.0                      |
           Keywords|                            |EH

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note in GCC 12+, you also need -fno-delete-dead-exceptions  to get the ICE.