test_libpluto.c test 6: diamond tiling not performed

[bondhugula]

Although diamond tiling is clearly possible here, it's not being performed (the scalar dimension at the top likely confuses the detection).

$ ./test_libpluto
[...]
*** TEST CASE 6

[pluto] Diamond tiling not possible/useful
[pluto] Affine transformations

T(S1): (i0, i1+i2, i1)
loop types (loop, loop, loop)

Outermost tilable bands: 1 bands
(t1, t2, t3, ) with stmts {S1, }
Innermost tilable bands: 1 bands
(t1, t2, t3, ) with stmts {S1, }
[Pluto] After tiling:
T(S1): (i0/32, (i1+i2)/32, i1/32, i0, i1+i2, i1)
loop types (loop, loop, loop, loop, loop, loop)

[Pluto] After intra-tile optimize
T(S1): (i0/32, (i1+i2)/32, i1/32, i1+i2, i1, i0)
loop types (loop, loop, loop, loop, loop, loop)

[pluto_mark_parallel] 1 parallel loops
t1 {loop with stmts: S1, }

[pluto] Auto-transformation time: 0.002858s
[pluto] Other/Misc time: 0.008955s
[pluto] Total time: 0.011813s
[R, T] -> { S_0[i0, i1, i2] -> [o0, o1, o2, i1 + i2, i1, i0] : -31 + i0 <= 32o0 <= i0 and -31 + i1 + i2 <= 32o1 <= i1 + i2 and -31 + i1 <= 32o2 <= i1 }