From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 16175 invoked by alias); 16 Feb 2014 01:42:12 -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 16146 invoked by uid 48); 16 Feb 2014 01:42:07 -0000 From: "harmeeksingh at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/60220] New: Vectorization : simple loop : fails to vectorize Date: Sun, 16 Feb 2014 01:42:00 -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: 2014-02/txt/msg01431.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60220 Bug ID: 60220 Summary: Vectorization : simple loop : fails to vectorize 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 #include #include #define FALSE ((char )0) struct test { int *copy; }; typedef struct test test; void foo(test *__restrict c, unsigned int a, unsigned int num) { unsigned int cnt; for (cnt = 0; cnt < num ; cnt++) c->copy[cnt] = FALSE; for (cnt = 0; cnt < num ; cnt++) printf("%u \n", c->copy[cnt]); } $ gcc -ggdb -O6 -march=native -pipe -fno-strict-aliasing -funroll-all-loops -fpeel-loops -unroll-loops --param max-unroll-times=4 -ffast-math -fpeel-loops -fwrapv -fPIC -pthread -rdynamic -DCLS=64 -mfpmath=sse -mmmx -msse -msse2 -msse3 -mssse3 -msse4.1 -msse4.2 -msse4 -ftree-vectorize -ftree-vectorizer-verbose=7 -fgraphite-identity -falign-functions=4 -falign-loops=4 -falign-jumps=4 -fexpensive-optimizations -frerun-cse-after-loop -frerun-loop-opt -finline-functions -o /tmp/x.o -c /tmp/x.c Analyzing loop at /tmp/x.c:18 18: not vectorized: loop contains function calls or data references that cannot be analyzed Analyzing loop at /tmp/x.c:16 16: not vectorized: data ref analysis failed *D.2523_9 = 0; 16: not vectorized: data ref analysis failed *D.2523_9 = 0; /tmp/x.c:13: note: vectorized 0 loops in function. Gcc - version $ 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)