Test irwdepv0

PPC irwdepv0 (PPCIrwdep)
"irw, one writer dependancies"
{
P0:r4=x ;
          P1:r5=y ;
P2:r4=x ; P2:r5=y ;
x=z ; y=z ; z=z ;
}

P0           |P1           |P2           ;
ld  r5,0(r4) |ld  r4,0(r5) |std r5,0(r4) ;
ld  r1,0(r5) |ld  r1,0(r4) |std r4,0(r5) ;

Observed
    0:r1=z; 0:r5=y; 1:r1=z; 1:r4=x;