MLIR Summit OpenMP Roundtable discussion (Summary)

[Meinersbur]

@kiranchandramohan

The question I was asking is whether nesting sufficient to model the loop transformation operations in the OpenMP standard?

For OpenMP 5.2 this would be sufficient. However, future OpenMP standards will include an apply clause that will allow applying directives into the middle of a generated loop. E.g.

#pragma omp tile sizes(4) apply(intratile:unroll)
for (int i = 0; i < 64; ++i) ; 

which is equivalent to

#pragma omp 
for (int i1 = 0; i1 < 64; i1+=4) 
  #pragma omp unroll
  for (int i = i1; i < i1+4; ++i) ;