[MLIR]Increase the limit of SCF nested tiling loop to 10

[pzread]

Summary

In some cases the tiling can create more than 6 levels of loops at once (7 levels found in a TF example). Gradually increases the limit to 10.

[pzread]

Update

mlir/lib/Dialect/SCF/Utils/Utils.cpp

SmallVector<scf::ForOp> mlir::replaceLoopNestWithNewYields(
     OpBuilder &builder, ArrayRef<scf::ForOp> loopNest,
     ValueRange newIterOperands, const NewYieldValueFn &newYieldValueFn,
     bool replaceIterOperandsUsesInLoop) {
   if (loopNest.empty())
     return {};
   // This method is recursive (to make it more readable). Adding an
   // assertion here to limit the recursion. (See
   // https://discourse.llvm.org/t/rfc-update-to-mlir-developer-policy-on-recursion/62235)
-  assert(loopNest.size() <= 6 &&
+  assert(loopNest.size() <= 10 &&
          "exceeded recursion limit when yielding value from loop nest");
 
   // To yield a value from a perfectly nested loop nest, the following
   // pattern needs to be created, i.e. starting with
   //
   // ```mlir
   //  scf.for .. {
   //    scf.for .. {