From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
 id E6C0D3858D37; Thu,  3 Feb 2022 12:18:02 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org E6C0D3858D37
From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/104356] [12 Regression] divide by zero trap
 is being removed now when it should not be in some cases
Date: Thu, 03 Feb 2022 12:18:02 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 12.0
X-Bugzilla-Keywords: wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: ebotcazou at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 12.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-104356-4-AAXGHLrgvq@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-104356-4@http.gcc.gnu.org/bugzilla/>
References: <bug-104356-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <https://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Thu, 03 Feb 2022 12:18:03 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104356

--- Comment #26 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Oh, with the little detail that it should be
> cfun->can_throw_non_call_exceptions
> (with the unfortunate reference to cfun)

Yes, and note that this will also solve the libgcc2.c issue because of:

ifeq ($(LIB2_DIVMOD_EXCEPTION_FLAGS),)
# Provide default flags for compiling divmod functions, if they haven't been
# set already by a target-specific Makefile fragment.
LIB2_DIVMOD_EXCEPTION_FLAGS :=3D -fexceptions -fnon-call-exceptions
endif

# Build LIB2_DIVMOD_FUNCS.
lib2-divmod-o =3D $(patsubst %,%$(objext),$(LIB2_DIVMOD_FUNCS))
$(lib2-divmod-o): %$(objext): $(srcdir)/libgcc2.c
        $(gcc_compile) -DL$* -c $< \
          $(LIB2_DIVMOD_EXCEPTION_FLAGS) $(vis_hide)
libgcc-objects +=3D $(lib2-divmod-o)

ifeq ($(enable_shared),yes)
lib2-divmod-s-o =3D $(patsubst %,%_s$(objext),$(LIB2_DIVMOD_FUNCS))
$(lib2-divmod-s-o): %_s$(objext): $(srcdir)/libgcc2.c
        $(gcc_s_compile) -DL$* -c $< \
          $(LIB2_DIVMOD_EXCEPTION_FLAGS)
libgcc-s-objects +=3D $(lib2-divmod-s-o)
endif

in libgcc/Makefile.in.=