Test e4

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PPC e4 (EFour)
{
0:r5=x ; 0:r6=y; 0:r1=1 ; 0:r2=2;
1:r5=x ; 1:r6=y; 1:r1=1 ; 1:r2=2;
}
P0          |P1           ;
stw r1,0(r5)|stw r1,0(r6) ;
stw r2,0(r6)|stw r2,0(r5) ;
lwz r3,0(r5)|lwz r3,0(r6) ;
locations [x; y; 0:r3; 1:r3;]
exists (true)