From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 23997 invoked by alias); 6 Jan 2014 10:00:32 -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 23940 invoked by uid 48); 6 Jan 2014 10:00:29 -0000 From: "trippels at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/59644] [4.9 Regression] r206243 miscompiles Linux kernel Date: Mon, 06 Jan 2014 10:00:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: tree-optimization X-Bugzilla-Version: 4.9.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: trippels at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.9.0 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: component 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/msg00386.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59644 Markus Trippelsdorf changed: What |Removed |Added ---------------------------------------------------------------------------- Component|target |tree-optimization --- Comment #16 from Markus Trippelsdorf --- Ok it's the second hunk that causes the hang: @@ -2680,28 +2677,25 @@ printk: pushq %rbp movq %rsp, %rbp - pushq %r10 - leaq -56(%rbp), %rax - leaq 16(%rbp), %r10 subq $72, %rsp + leaq 16(%rbp), %r10 movq %rsi, -48(%rbp) movq %rdx, -40(%rbp) movq %rcx, -32(%rbp) movq %r8, -24(%rbp) - xorl %ecx, %ecx + leaq -56(%rbp), %rax movq %r9, -16(%rbp) movq %rdi, %r8 leaq -80(%rbp), %r9 + xorl %ecx, %ecx xorl %edx, %edx orl $-1, %esi xorl %edi, %edi - movq %r10, -72(%rbp) movl $8, -80(%rbp) + movq %r10, -72(%rbp) movq %rax, -64(%rbp) call vprintk_emit - addq $72, %rsp - popq %r10 - popq %rbp + leave ret .size printk, .-printk .LCOLDE47: