From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 33291 invoked by alias); 5 Mar 2015 20:11:48 -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 33200 invoked by uid 48); 5 Mar 2015 20:11:42 -0000 From: "hubicka at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug ipa/65270] issues with merging memory accesses from different code paths Date: Thu, 05 Mar 2015 20:11:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: ipa X-Bugzilla-Version: 5.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: hubicka at gcc dot gnu.org X-Bugzilla-Status: REOPENED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: rguenth at gcc dot gnu.org X-Bugzilla-Target-Milestone: 5.0 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-SW-Source: 2015-03/txt/msg00657.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D65270 --- Comment #27 from Jan Hubicka --- here is a variant of orignal testcase for tree-tail-merge struct a=20 { int a[100000]; }; typedef struct a misaligned_t __attribute__ ((aligned (8))); typedef struct a aligned_t __attribute__ ((aligned (32))); __attribute__ ((used)) __attribute__ ((noinline)) t(void *a, int misaligned, aligned_t *d) { int i,v; for (i=3D0;i<100000;i++) { if (misaligned) v=3D((misaligned_t *)a)->a[i]; else v=3D((aligned_t *)a)->a[i]; d->a[i]+=3Dv; } } struct b {int v; misaligned_t m;aligned_t aa;} b; aligned_t d; main() { t(&b.m, 1, &d); } $ ./xgcc -B ./ -O3 t.c -fdump-tree-all-details=20=20 t.c:10:1: warning: return type defaults to =EF=BF=BDint=EF=BF=BD [-Wimplici= t-int] t(void *a, int misaligned, aligned_t *d) ^ t.c:24:1: warning: return type defaults to =EF=BF=BDint=EF=BF=BD [-Wimplici= t-int] main() ^ $ ./a.out Segmentation fault It works (by accident) for GCC 4.7, so it is a regression again... >>From gcc-bugs-return-479514-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Mar 05 20:22:31 2015 Return-Path: Delivered-To: listarch-gcc-bugs@gcc.gnu.org Received: (qmail 25877 invoked by alias); 5 Mar 2015 20:22:31 -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 25715 invoked by uid 48); 5 Mar 2015 20:22:27 -0000 From: "paolo.carlini at oracle dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/65323] -Wzero-as-null-pointer-constant stutters Date: Thu, 05 Mar 2015 20:22:00 -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: 5.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: paolo.carlini at oracle dot com X-Bugzilla-Status: NEW 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_status cf_reconfirmed_on everconfirmed Message-ID: In-Reply-To: References: 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: 2015-03/txt/msg00658.txt.bz2 Content-length: 407 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65323 Paolo Carlini changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2015-03-05 Ever confirmed|0 |1