From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 1200 invoked by alias); 28 Jul 2014 17:24:44 -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 1141 invoked by uid 48); 28 Jul 2014 17:24:35 -0000 From: "redi at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/61937] New: Misleading errors due to constructor template deducing argument as void Date: Mon, 28 Jul 2014 17:24:00 -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: 4.10.0 X-Bugzilla-Keywords: diagnostic X-Bugzilla-Severity: minor X-Bugzilla-Who: redi 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: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status keywords bug_severity priority component assigned_to reporter 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: 2014-07/txt/msg01859.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D61937 Bug ID: 61937 Summary: Misleading errors due to constructor template deducing argument as void Product: gcc Version: 4.10.0 Status: UNCONFIRMED Keywords: diagnostic Severity: minor Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: redi at gcc dot gnu.org template struct trait; template struct trait { using type =3D T; }; template struct trait { using type =3D T; }; struct S { template::type> S(const T&) { } }; void f() { } S s =3D f(); Compiling with -std=3Dc++11 gives four errors: void.cc: In substitution of =E2=80=98template S::S(const = T&) [with T =3D void; U =3D ]=E2=80=99: void.cc:23:9: required from here void.cc:17:24: error: ambiguous class template instantiation for =E2=80=98s= truct trait=E2=80=99 template::type> ^ void.cc:5:10: error: candidates are: struct trait struct trait ^ void.cc:11:10: error: struct trait struct trait ^ void.cc:23:9: error: conversion from =E2=80=98void=E2=80=99 to non-scalar t= ype =E2=80=98S=E2=80=99 requested S s =3D f(); ^ Only the last one is relevant and useful, the others are just confusing. The first three errors are due to instantiating the constructor template wi= th T =3D void but that doesn't make much sense. It implies the function f() retu= rns an object of type void, rather than returning nothing. >>From gcc-bugs-return-457269-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Jul 28 19:11:59 2014 Return-Path: Delivered-To: listarch-gcc-bugs@gcc.gnu.org Received: (qmail 22151 invoked by alias); 28 Jul 2014 19:11:58 -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 22064 invoked by uid 48); 28 Jul 2014 19:11:52 -0000 From: "harmeeksingh at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/61938] New: Vectorization not happening . Date: Mon, 28 Jul 2014 19:11:00 -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: unknown X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: harmeeksingh at gmail 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 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: 2014-07/txt/msg01860.txt.bz2 Content-length: 2427 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61938 Bug ID: 61938 Summary: Vectorization not happening . Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: harmeeksingh at gmail dot com $ gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/4.7.2/lto-wrapper Target: x86_64-redhat-linux Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --disable-build-with-cxx --disable-build-poststage1-with-cxx --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu --enable-languages=c,c++,objc,obj-c++,java,fortran,ada,go,lto --enable-plugin --enable-initfini-array --enable-java-awt=gtk --disable-dssi --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre --enable-libgcj-multifile --enable-java-maintainer-mode --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib --with-ppl --with-cloog --with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux Thread model: posix gcc version 4.7.2 20120921 (Red Hat 4.7.2-2) (GCC) Testcase #include #define VEC 1024 typedef long int int64; typedef int int32; void foo (int arraysize, int *result, int *selectvector, int selectelements, int32 *array, int32 compval) { int k, i; for (k =0,i=0; i < selectelements; ++i) { result[k] = selectvector[i]; k += (((array[selectvector[i]])) == compval); } } main() { int result[VEC]; int selectvector[VEC]; int selectelements; int32 array[VEC]; int k, i; foo(VEC, &result[0], &selectvector[0], VEC, &array[0], 1); } Compilation log gcc -fPIC -ggdb -O3 -march=native -ftree-vectorize -ftree-vectorizer-verbose=7 /tmp/x.c -o /tmp/x Analyzing loop at /tmp/x.c:17 17: not vectorized: data ref analysis failed *D.2502_9 = D.2506_14; 17: not vectorized: data ref analysis failed *D.2502_9 = D.2506_14; /tmp/x.c:9: note: vectorized 0 loops in function.