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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug fortran/65766] gFortran Compiler SEGFAULTING on compiling simple program Date: Wed, 07 Oct 2015 07:47:00 -0000 [thread overview] Message-ID: <bug-65766-4-RAbEF1fNfq@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-65766-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65766 --- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- > 2015-10-06 Louis Krupp <louis.krupp@zoho.com> > > PR fortran/65766 > * gfortran.dg/substr_alloc_string_comp_1.f90: New. AFAICT the test has not been committed. >From gcc-bugs-return-498931-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 07 07:56:00 2015 Return-Path: <gcc-bugs-return-498931-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org> Delivered-To: listarch-gcc-bugs@gcc.gnu.org Received: (qmail 84423 invoked by alias); 7 Oct 2015 07:56:00 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: <gcc-bugs.gcc.gnu.org> List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/> List-Post: <mailto:gcc-bugs@gcc.gnu.org> List-Help: <mailto:gcc-bugs-help@gcc.gnu.org> Sender: gcc-bugs-owner@gcc.gnu.org Delivered-To: mailing list gcc-bugs@gcc.gnu.org Received: (qmail 84330 invoked by uid 48); 7 Oct 2015 07:55:56 -0000 From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/67879] unnecessary jump in ternary Date: Wed, 07 Oct 2015 07:56:00 -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: 5.2.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: enhancement X-Bugzilla-Who: rguenth at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: 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: keywords bug_status cf_reconfirmed_on component version dependson everconfirmed Message-ID: <bug-67879-4-iLoIw02UE4@http.gcc.gnu.org/bugzilla/> In-Reply-To: <bug-67879-4@http.gcc.gnu.org/bugzilla/> References: <bug-67879-4@http.gcc.gnu.org/bugzilla/> 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: 2015-10/txt/msg00486.txt.bz2 Content-length: 1968 https://gcc.gnu.org/bugzilla/show_bug.cgi?idg879 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |missed-optimization Status|UNCONFIRMED |NEW Last reconfirmed| |2015-10-07 Component|c |tree-optimization Version|unknown |5.2.0 Depends on| |23286 Ever confirmed|0 |1 --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- With GCC 5 at -O2 it's _Z1fiiPi: .LFB0: .cfi_startproc cmpl %esi, %edi movl (%rdx), %eax jl .L5 addl $1, %eax ret .p2align 4,,10 .p2align 3 .L5: rep ret vs. _Z2f2iiPi: .LFB1: .cfi_startproc xorl %eax, %eax cmpl %esi, %edi setge %al addl (%rdx), %eax ret where f2 is already in if-converted form on the GIMPLE level: int f2(int, int, int*) (int a, int b, int * c) { int _6; int _7; bool _8; int _9; <bb 2>: _6 = *c_5(D); _8 = a_2(D) >= b_3(D); _9 = (int) _8; _7 = _6 + _9; return _7; The reason why we are not if-converting f on the GIMPLE level is the lack of a code hoisting pass and thus we have <bb 2>: if (a_2(D) < b_3(D)) goto <bb 3>; else goto <bb 4>; <bb 3>: iftmp.0_6 = *c_5(D); goto <bb 5>; <bb 4>: _7 = *c_5(D); iftmp.0_8 = _7 + 1; <bb 5>: # iftmp.0_1 = PHI <iftmp.0_6(3), iftmp.0_8(4)> which "confuses" phiopt enough. Only RTL hoists the loads (in 261r.mach?). PR23286 tracks the lack of code hoisting on GIMPLE. Referenced Bugs: https://gcc.gnu.org/bugzilla/show_bug.cgi?id#286 [Bug 23286] Missed code hoisting optimization
next prev parent reply other threads:[~2015-10-07 7:47 UTC|newest] Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-04-15 0:19 [Bug fortran/65766] New: " giorgianb at gmail dot com 2015-04-15 1:52 ` [Bug fortran/65766] " jvdelisle at gcc dot gnu.org 2015-07-28 8:26 ` t56xjcu6dh at snkmail dot com 2015-07-28 8:38 ` t56xjcu6dh at snkmail dot com 2015-07-30 12:11 ` dominiq at lps dot ens.fr 2015-09-10 10:00 ` dominiq at lps dot ens.fr 2015-09-10 10:01 ` dominiq at lps dot ens.fr 2015-09-10 10:04 ` dominiq at lps dot ens.fr 2015-10-06 23:47 ` lkrupp at gcc dot gnu.org 2015-10-07 0:14 ` lkrupp at gcc dot gnu.org 2015-10-07 7:47 ` dominiq at lps dot ens.fr [this message] 2015-10-07 9:30 ` louis.krupp at zoho dot com
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