These ops should not belong to the std dialect.
This CL extracts them in their own dialect and updates the corresponding conversions and tests.
PiperOrigin-RevId: 258123853
Parametric tiling can be used to extract outer loops with fixed number of
iterations. This in turn enables mapping to GPU kernels on a fixed grid
independently of the range of the original loops, which may be unknown
statically, making the kernel adaptable to different sizes. Provide a utility
function that also computes the parametric tile size given the range of the
loop. Exercise the utility function through a simple pass that applies it to
all top-level loop nests. Permutability or parallelism checks must be
performed before calling this utility function in actual passes.
Note that parametric tiling cannot be implemented in a purely affine way,
although it can be encoded using semi-affine maps. The choice to implement it
on standard loops is guided by them being the common representation between
Affine loops, Linalg and GPU kernels.
PiperOrigin-RevId: 257180251
Nicolas Vasilache