From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id D1E803817D03; Mon, 13 Jun 2022 16:40:28 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org D1E803817D03 From: "jkanapes at yahoo dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/105950] > O2 optimization causes runtime (SIGILL) during main initialization Date: Mon, 13 Jun 2022 16:40:28 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c X-Bugzilla-Version: 9.4.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: jkanapes at yahoo dot com X-Bugzilla-Status: WAITING X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 13 Jun 2022 16:40:28 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105950 --- Comment #2 from John Kanapes --- Hi, The missing info, gcc -v -save-temps is provided as an attachment. Of the flags, Wextra, -fno-strict-aliasing -fwrapv -fno-aggressive-loop-optimizations did nothing. -fsanitize=3Dundefined creates the following output for main: usr/bin/ld: capture.o: in function `main.cold': capture.c:(.text.unlikely+0x112): undefined reference to `__ubsan_handle_load_invalid_value' /usr/bin/ld: capture.c:(.text.unlikely+0x13a): undefined reference to `__ubsan_handle_nonnull_arg' /usr/bin/ld: capture.c:(.text.unlikely+0x16b): undefined reference to `__ubsan_handle_nonnull_arg' /usr/bin/ld: capture.c:(.text.unlikely+0x19c): undefined reference to `__ubsan_handle_nonnull_arg' /usr/bin/ld: capture.c:(.text.unlikely+0x1cd): undefined reference to `__ubsan_handle_nonnull_arg' /usr/bin/ld: capture.c:(.text.unlikely+0x1f6): undefined reference to `__ubsan_handle_nonnull_arg' /usr/bin/ld: capture.o:capture.c:(.text.unlikely+0x21f): more undefined references to `__ubsan_handle_nonnull_arg' follow /usr/bin/ld: capture.o: in function `main.cold': capture.c:(.text.unlikely+0x35e): undefined reference to `__ubsan_handle_load_invalid_value' /usr/bin/ld: capture.c:(.text.unlikely+0x381): undefined reference to `__ubsan_handle_load_invalid_value' /usr/bin/ld: capture.c:(.text.unlikely+0x3a1): undefined reference to `__ubsan_handle_nonnull_arg' /usr/bin/ld: capture.c:(.text.unlikely+0x3c1): undefined reference to `__ubsan_handle_nonnull_arg' /usr/bin/ld: capture.c:(.text.unlikely+0x3e1): undefined reference to `__ubsan_handle_nonnull_arg' /usr/bin/ld: capture.c:(.text.unlikely+0x409): undefined reference to `__ubsan_handle_load_invalid_value' /usr/bin/ld: capture.c:(.text.unlikely+0x42a): undefined reference to `__ubsan_handle_load_invalid_value' /usr/bin/ld: capture.o: in function `main': capture.c:(.text.startup+0xa2d): undefined reference to `__ubsan_handle_pointer_overflow' /usr/bin/ld: capture.c:(.text.startup+0x1042): undefined reference to `__ubsan_handle_sub_overflow' /usr/bin/ld: capture.c:(.text.startup+0x1053): undefined reference to `__ubsan_handle_out_of_bounds' /usr/bin/ld: capture.c:(.text.startup+0x1067): undefined reference to `__ubsan_handle_pointer_overflow' /usr/bin/ld: capture.c:(.text.startup+0x107e): undefined reference to `__ubsan_handle_pointer_overflow' /usr/bin/ld: capture.c:(.text.startup+0x1092): undefined reference to `__ubsan_handle_type_mismatch_v1' collect2: error: ld returned 1 exit status=