[Bug tree-optimization/14295] [tree-ssa] copy propagation for aggregates

["rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #5 from rguenth at gcc dot gnu dot org  2006-01-14 12:16 -------
4.1 branch has
;; Function foo (foo)

Analyzing Edge Insertions.
foo (r)
{
  struct s temp_struct3;
  struct s temp_struct2;
  struct s temp_struct1;

<bb 0>:
  temp_struct1 = r;
  temp_struct2 = temp_struct1;
  temp_struct3 = temp_struct2;
  <retval> = temp_struct3;
  return <retval>;

}

and generates

foo:
        pushl   %ebp
        movl    %esp, %ebp
        pushl   %edi
        pushl   %esi
        subl    $56, %esp
        leal    -28(%ebp), %edi
        leal    12(%ebp), %esi
        cld
        movl    $5, %ecx
        rep
        movsl
        leal    -48(%ebp), %edi
        leal    -28(%ebp), %esi
        movb    $5, %cl
        rep
        movsl
        leal    -48(%ebp), %esi
        movl    8(%ebp), %edi
        movb    $5, %cl
        rep
        movsl
        movl    8(%ebp), %eax
        addl    $56, %esp
        popl    %esi
        popl    %edi
        leave
        ret     $4


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rguenth at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14295