The implicit conversion from an op to a Value is not triggered for some reasons:
/LoopLikeSCFOpsTest.cpp:78:57: error: call of overloaded ‘ValueRange(mlir::arith::ConstantIndexOp)’ is ambiguous
b.create<scf::ParallelOp>(loc, ValueRange(lb.get()), ValueRange(ub.get()),
explicitly taking the result of the op should solve it.
This adds implementations for `getSingleIterationVar`,
`getSingleLowerBound`, `getSingleUpperBound`, `getSingleStep` of
`LoopLikeOpInterface` to `scf::ParallelOp`. Until now, the
implementations for these methods defaulted to returning `std::nullopt`,
even in the special case where the parallel Op only has one dimension.
Related: https://github.com/llvm/llvm-project/pull/67883
