[Bug target/59968] Unused BT patterns

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59968

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-01-28
     Ever confirmed|0                           |1

--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
For

int
__attribute__((noinline))
foo1 (int x, int y)
{
  x |= 1 << y;
  return x;
}

we generate

    movl    %esi, %ecx
    movl    $1, %eax
    sall    %cl, %eax
    orl    %edi, %eax
    ret

I am expecting

    movl    %edi, %eax
    bts     %esi, %eax
    ret