[Bug optimization/14776] New: -mfpmath=sse causes movapd from non-16-byte aligned address

[ford at vss dot fsi dot com]

gcc -g -O2 -march=pentium4 -mfpmath=sse -c movapd_align_bug.c

objdump -dS movapd_align_bug.o:

        xfp->m[0].x = -sin_lon;
  42:   f2 0f 10 05 00 00 00    movsd  0x0,%xmm0
  49:   00 
  4a:   f2 0f 10 4d b0          movsd  0xffffffb0(%ebp),%xmm1
  4f:   66 0f 29 45 88          movapd %xmm0,0xffffff88(%ebp) <- ILLEGAL
  54:   66 0f 57 c8             xorpd  %xmm0,%xmm1
        xfp->m[1].x =  cos_lon;
        xfp->m[2].x = 0.0;

-- 
           Summary: -mfpmath=sse causes movapd from non-16-byte aligned
                    address
           Product: gcc
           Version: 3.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ford at vss dot fsi dot com
                CC: gcc-bugs at gcc dot gnu dot org
 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=14776