[Bug c/45036] New: Copying array to static location with -O3 -march=native causes SEGV at runtime

[jquinsey at entrenet dot com]

Source:  

int main(void) {
    static int foo[4];
    int bar[4];
    int i;
    for (i = 0; i < 4; i++)
        foo[i] = bar[i];
    return 0;
}

Compile and run: 

gcc -O3 -march=native foobar.c
a.exe
Segmentation fault (core dumped)

The loop is compiled as:

        movdqu  -20(%ebp), %xmm0
        xorl    %eax, %eax
        movaps  %xmm0, _foo.1548

Version: gcc -v
Using built-in specs.
Target: i686-pc-cygwin
Configured with:
/gnu/gcc/releases/packaging/4.3.4-3/gcc4-4.3.4-3/src/gcc-4.3.4/configure
--srcdir=/gnu/gcc/releases/packaging/4.3.4-3/gcc4-4.3.4-3/src/gcc-4.3.4
--prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin
--libexecdir=/usr/lib --datadir=/usr/share --localstatedir=/var
--sysconfdir=/etc --infodir=/usr/share/info --mandir=/usr/share/man
--datadir=/usr/share --infodir=/usr/share/info --mandir=/usr/share/man -v
--with-gmp=/usr --with-mpfr=/usr --enable-bootstrap
--enable-version-specific-runtime-libs --with-slibdir=/usr/bin
--libexecdir=/usr/lib --enable-static --enable-shared --enable-shared-libgcc
--disable-__cxa_atexit --with-gnu-ld --with-gnu-as --with-dwarf2
--disable-sjlj-exceptions
--enable-languages=ada,c,c++,fortran,java,objc,obj-c++ --disable-symvers
--enable-libjava --program-suffix=-4 --enable-libgomp --enable-libssp
--enable-libada --enable-threads=posix --with-arch=i686 --with-tune=generic
--enable-libgcj-sublibs CC=gcc-4 CXX=g++-4 CC_FOR_TARGET=gcc-4
CXX_FOR_TARGET=g++-4 GNATMAKE_FOR_TARGET=gnatmake GNATBIND_FOR_TARGET=gnatbind
AS=/opt/gcc-tools/bin/as.exe AS_FOR_TARGET=/opt/gcc-tools/bin/as.exe
LD=/opt/gcc-tools/bin/ld.exe LD_FOR_TARGET=/opt/gcc-tools/bin/ld.exe
--with-ecj-jar=/usr/share/java/ecj.jar
Thread model: posix
gcc version 4.3.4 20090804 (release) 1 (GCC)


-- 
           Summary: Copying array to static location with -O3  -march=native
                    causes SEGV at runtime
           Product: gcc
           Version: 4.3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jquinsey at entrenet dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45036