From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 9727 invoked by alias); 7 Jan 2015 19:21:20 -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 9706 invoked by uid 48); 7 Jan 2015 19:21:15 -0000 From: "gcc at swtaarrs dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/64527] New: Constructor for empty struct not called in some situations Date: Wed, 07 Jan 2015 19:21:00 -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: 4.9.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: gcc at swtaarrs dot com 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 attachments.created Message-ID: 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-SW-Source: 2015-01/txt/msg00402.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D64527 Bug ID: 64527 Summary: Constructor for empty struct not called in some situations Product: gcc Version: 4.9.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: gcc at swtaarrs dot com Created attachment 34396 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D34396&action=3Dedit c++ code exposing the bug Build ctor.cpp with the following command: > g++ -std=3Dc++11 -Os -S -o ctor.S ctor.cpp The optimization level doesn't appear to affect the presence of the bug, I = just used -Os to keep the output more compact. Expected results: The m() function in ctor.S should contain a call to A::A(= ). Actual results: m() does nothing but zero out accessor::x. I've found at le= ast three ways to perturb the bug out of existence which are documented in comm= ents in the file. The bug is also present in gcc 4.8.1 (I haven't tried anything older). Compiling with -Wextra reports "warning: missing initializer for member =E2=80=98accessor::a=E2=80=99 [-Wmissing-field-initializers]" but I believe= this shouldn't affect the ouput. gcc build info: Target: x86_64-unknown-linux-gnu Configured with: ./configure --prefix=3D/home/matthew/gcc-4.9.0-prefix Thread model: posix gcc version 4.9.0 (GCC) >>From gcc-bugs-return-472409-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Jan 07 19:39:40 2015 Return-Path: Delivered-To: listarch-gcc-bugs@gcc.gnu.org Received: (qmail 23856 invoked by alias); 7 Jan 2015 19:39:39 -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 Delivered-To: mailing list gcc-bugs@gcc.gnu.org Received: (qmail 23798 invoked by uid 48); 7 Jan 2015 19:39:33 -0000 From: "zsojka at seznam dot cz" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/64528] New: [5 Regression] ICE: in process_constraint, at tree-ssa-structalias.c:3002 with -O -fno-tree-ccp -fno-tree-dce Date: Wed, 07 Jan 2015 19:39:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: tree-optimization X-Bugzilla-Version: 5.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: zsojka at seznam dot cz 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 attachments.created 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/msg00403.txt.bz2 Content-length: 1711 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64528 Bug ID: 64528 Summary: [5 Regression] ICE: in process_constraint, at tree-ssa-structalias.c:3002 with -O -fno-tree-ccp -fno-tree-dce Product: gcc Version: 5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: zsojka at seznam dot cz Created attachment 34397 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34397&action=edit reduced testcase (from gfortran.dg/value_test.f90) Compiler output: $ gcc -O -fno-tree-ccp -fno-tree-dce testcase.f90 testcase.f90:11:0: end program valueTests ^ internal compiler error: in process_constraint, at tree-ssa-structalias.c:3002 0xe7907d process_constraint /mnt/svn/gcc-trunk/gcc/tree-ssa-structalias.c:3002 0xe793b3 process_all_all_constraints /mnt/svn/gcc-trunk/gcc/tree-ssa-structalias.c:3581 0xe84cd3 find_func_aliases /mnt/svn/gcc-trunk/gcc/tree-ssa-structalias.c:4748 0xe87c26 compute_points_to_sets /mnt/svn/gcc-trunk/gcc/tree-ssa-structalias.c:6825 0xe87c26 compute_may_aliases() /mnt/svn/gcc-trunk/gcc/tree-ssa-structalias.c:7161 0xbbd8ec execute_function_todo /mnt/svn/gcc-trunk/gcc/passes.c:1912 0xbbe563 execute_todo /mnt/svn/gcc-trunk/gcc/passes.c:1997 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See for instructions. Tested revisions: r219277 - ICE r218446 - ICE r212099 - ICE 4_9 r219040 - OK