From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 32390 invoked by alias); 28 Jan 2014 18:25:49 -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 32357 invoked by uid 48); 28 Jan 2014 18:25:46 -0000 From: "ubizjak at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/59679] gcc version 4.7.3 and gcc version 4.5.3 cause an unaligned access exception on NetBSD/Alpha Date: Tue, 28 Jan 2014 18:25:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: middle-end X-Bugzilla-Version: 4.7.3 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: ubizjak at gmail dot com X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.7.4 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: component 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: 2014-01/txt/msg02928.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D59679 Uro=C5=A1 Bizjak changed: What |Removed |Added ---------------------------------------------------------------------------- Component|tree-optimization |middle-end --- Comment #15 from Uro=C5=A1 Bizjak --- (In reply to Uro=C5=A1 Bizjak from comment #13) > Confirmed as tree-optimization problem on 4.9 branch. Actually, a middle-end problem, if at all. With -ftree-ter, expand creates a couple of unaligned loads to arg0: (insn 101 100 102 (set (reg:SI 150) (mem:SI (reg/v/f:DI 115 [ arg0 ]) [0 S4 A8])) scope-reduced.c:60 -1 (nil)) ... (insn 105 104 106 17 (set (mem:SI (reg/v/f:DI 115 [ arg0 ]) [0 S4 A8]) (reg:SI 151)) scope-reduced.c:60 -1 (nil)) >>From gcc-bugs-return-441787-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jan 28 18:26:37 2014 Return-Path: Delivered-To: listarch-gcc-bugs@gcc.gnu.org Received: (qmail 832 invoked by alias); 28 Jan 2014 18:26:36 -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 779 invoked by uid 48); 28 Jan 2014 18:26:33 -0000 From: "ubizjak at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/59679] gcc version 4.7.3 and gcc version 4.5.3 cause an unaligned access exception on NetBSD/Alpha Date: Tue, 28 Jan 2014 18:26:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: middle-end X-Bugzilla-Version: 4.7.3 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: ubizjak at gmail dot com X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.7.4 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: 2014-01/txt/msg02929.txt.bz2 Content-length: 417 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D59679 --- Comment #16 from Uro=C5=A1 Bizjak --- (In reply to Uro=C5=A1 Bizjak from comment #15) > (In reply to Uro=C5=A1 Bizjak from comment #13) > > Confirmed as tree-optimization problem on 4.9 branch. >=20 > Actually, a middle-end problem, if at all. With -ftree-ter, expand create= s a > couple of unaligned loads to arg0: s/loads/moves/ >>From gcc-bugs-return-441788-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Jan 28 18:31:08 2014 Return-Path: Delivered-To: listarch-gcc-bugs@gcc.gnu.org Received: (qmail 3903 invoked by alias); 28 Jan 2014 18:31:07 -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 3869 invoked by uid 48); 28 Jan 2014 18:31:04 -0000 From: "hjl.tools at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/59968] Unused BT patterns Date: Tue, 28 Jan 2014 18:31:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Version: 4.9.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: hjl.tools at gmail 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: 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: 2014-01/txt/msg02930.txt.bz2 Content-length: 874 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59968 --- Comment #12 from H.J. Lu --- For int bar1; void __attribute__((noinline)) foo1 (int y) { int z; if (!(bar1 & (1 << y))) xxx1 (); z = bar1 & (1 << y); bar1 |= 1 << y; bar1 &= ~z; } we generate movl bar1(%rip), %edx pushq %rbx .cfi_def_cfa_offset 16 .cfi_offset 3, -16 movl %edi, %ebx btl %edi, %edx jc .L3 call xxx1 movl bar1(%rip), %edx .L3: movl %ebx, %ecx movl $1, %eax sall %cl, %eax movl %edx, %ecx andl %eax, %ecx orl %edx, %eax notl %ecx andl %ecx, %eax movl %eax, bar1(%rip) popq %rbx .cfi_def_cfa_offset 8 ret I expect btc %edi, bar2(%rip) jc .L7 jmp xxx2 .L8: .p2align 4,,10 .p2align 3 .L7: rep ret