Some Cava optimization

• Optimize Cava's CPU schedule.
• Add fork-fusion pass for fusing unrelated but adjacent fork-joins.
• Add intrinsic functions to math expressions.
• Add print pass for debugging schedules.
• Avoid some edges in dot output to help little xdot out.
• TODO: need more relaxed bounds for forkify to parallelize demosaic.

juno_samples/cava/src/cava.jn

@@ -29,7 +29,7 @@ fn scale<row : usize, col : usize>(input : u8[CHAN, row, col]) -> f32[CHAN, row,
   for chan = 0 to CHAN {
     for r = 0 to row {
       for c = 0 to col {
-        res[chan, r, c] = input[chan, r, c] as f32 * (1.0 / 255.0);
+        res[chan, r, c] = input[chan, r, c] as f32 / 255.0;
       }
     }
   }