[Bug c/37216] New: Invalid XMM instructions generated with -O3

["simon dot sasburg at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

GCC generates an XMM instruction with a memory operand not 16-byte aligned as
it should be (i think), this generates a segmentation fault when run.

Input file: (test.c)
---------------------------------------------
int iarr[64];
int iint = 0;

int main() {
        int i;
        for(i=0;i<64;i++) {
                iarr[i] = -2;
        }
        return 0;
}
---------------------------------------------

Output of gcc -v:
Using built-in specs.
Target: i686-pc-cygwin
Configured with: ../source-4.3.1/configure --prefix=/usr/src/gcc/prefix-4.3.1
--enable-languages=c,c++ --disable-nls --without-included-gettext
--enable-version-specific-runtime-libs --enable-threads=posix
--disable-win32-registry
Thread model: posix
gcc version 4.3.1 (GCC) 

Command used to compile:
/usr/src/gcc/prefix-4.3.1/bin/gcc test.c -o test.exe -march=core2 -O3

CPU: Intel(R) Core(TM)2 CPU         T7200  @ 2.00GHz

Offending instruction: 'movdqa %xmm0,0x403024'


-- 
           Summary: Invalid XMM instructions generated with -O3
           Product: gcc
           Version: 4.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: simon dot sasburg at gmail dot com
 GCC build triplet: i686-pc-cygwin
  GCC host triplet: i686-pc-cygwin
GCC target triplet: i686-pc-cygwin


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37216