From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 14954 invoked by alias); 6 Jan 2015 19:01:20 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 14917 invoked by uid 48); 6 Jan 2015 19:01:14 -0000 From: "su at cs dot ucdavis.edu" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/64511] New: ICE at -O3 with -g enabled on x86_64-linux-gnu Date: Tue, 06 Jan 2015 19:01:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c X-Bugzilla-Version: 5.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: su at cs dot ucdavis.edu X-Bugzilla-Status: UNCONFIRMED 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: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2015-01/txt/msg00323.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64511 Bug ID: 64511 Summary: ICE at -O3 with -g enabled on x86_64-linux-gnu Product: gcc Version: 5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: su at cs dot ucdavis.edu The following code causes an ICE (after a very very long pause) when compiled with the current gcc trunk at -O3 with -g enabled on x86_64-linux-gnu in 64-bit mode (but not in 32-bit mode). It is a regression from 4.9.x. $ gcc-trunk -v Using built-in specs. COLLECT_GCC=gcc-trunk COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-unknown-linux-gnu/5.0.0/lto-wrapper Target: x86_64-unknown-linux-gnu Configured with: ../gcc-trunk/configure --prefix=/usr/local/gcc-trunk --enable-languages=c,c++ --disable-werror --enable-multilib Thread model: posix gcc version 5.0.0 20150106 (experimental) [trunk revision 219217] (GCC) $ $ gcc-trunk -O3 -c small.c $ gcc-4.9 -O3 -g -c small.c $ $ time gcc-trunk -O3 -g -c small.c gcc-trunk: internal compiler error: Segmentation fault (program cc1) 0x40c1de execute ../../gcc-trunk/gcc/gcc.c:2912 0x40c4e9 do_spec_1 ../../gcc-trunk/gcc/gcc.c:4845 0x40eaf7 process_brace_body ../../gcc-trunk/gcc/gcc.c:6128 0x40eaf7 handle_braces ../../gcc-trunk/gcc/gcc.c:6042 0x40d4e7 do_spec_1 ../../gcc-trunk/gcc/gcc.c:5499 0x40eaf7 process_brace_body ../../gcc-trunk/gcc/gcc.c:6128 0x40eaf7 handle_braces ../../gcc-trunk/gcc/gcc.c:6042 0x40d4e7 do_spec_1 ../../gcc-trunk/gcc/gcc.c:5499 0x40c873 do_spec_1 ../../gcc-trunk/gcc/gcc.c:5614 0x40eaf7 process_brace_body ../../gcc-trunk/gcc/gcc.c:6128 0x40eaf7 handle_braces ../../gcc-trunk/gcc/gcc.c:6042 0x40d4e7 do_spec_1 ../../gcc-trunk/gcc/gcc.c:5499 0x40eaf7 process_brace_body ../../gcc-trunk/gcc/gcc.c:6128 0x40eaf7 handle_braces ../../gcc-trunk/gcc/gcc.c:6042 0x40d4e7 do_spec_1 ../../gcc-trunk/gcc/gcc.c:5499 0x40eaf7 process_brace_body ../../gcc-trunk/gcc/gcc.c:6128 0x40eaf7 handle_braces ../../gcc-trunk/gcc/gcc.c:6042 0x40d4e7 do_spec_1 ../../gcc-trunk/gcc/gcc.c:5499 0x40eaf7 process_brace_body ../../gcc-trunk/gcc/gcc.c:6128 0x40eaf7 handle_braces ../../gcc-trunk/gcc/gcc.c:6042 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See for instructions. Command exited with non-zero status 4 50.56user 1.04system 2:06.99elapsed 40%CPU (0avgtext+0avgdata 5923360maxresident)k 56inputs+0outputs (4major+371046minor)pagefaults 0swaps $ ---------------------------------- char a; unsigned short b; int c; unsigned long d; void fn1 () { for (;;) ; } void fn2 (unsigned char p1) { unsigned char *e = &p1; c = 27; for (; c < 37; c++) b *= (a %= ((*e %= *e) ^ 0)); p1 /= d = a; fn1 (p1); }