[Bug target/43181] New: branches in conditional move code

[pinskia at gcc dot gnu dot org]

Take:
unsigned f(unsigned low32, unsigned *tmpA, unsigned prevBestA)
{
 unsigned t = *tmpA;
 if ((low32 > prevBestA ) && (!t))
   prevBestA = low32;
return prevBestA;
}
---- CUT ---
Currently we get:
        sltu    $2,$6,$4
        beq     $2,$0,$L2
        lw      $3,0($5)

        move    $2,$4
        movz    $6,$2,$3
$L2:
        j       $31
        move    $2,$6

But we should be able to have no branches in this case and only one conditional
move.  I checked the spu-elf target and noticed there are no branches there so
the middle-end is able to do it.


-- 
           Summary: branches in conditional move code
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org
GCC target triplet: mips64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43181