[Polly][Isl] Use isl::val::sub instead of isl::val::sub_ui. NFC
This is part of an effort to reduce the differences between the custom C++ bindings used right now by polly in `lib/External/isl/include/isl/isl-noxceptions.h` and the official isl C++ interface.
Changes made:
- Use `isl::val::sub` instead of `isl::val::sub_ui`
- `isl-noexceptions.h` has been generated by https://github.com/patacca/isl/commit/355e84163ae78ff637c71fb532f36d15277a2b1b
Depends on D107225
Reviewed By: Meinersbur
Differential Revision: https://reviews.llvm.org/D107293
GitOrigin-RevId: ce8272afb3fde5599d6d3827576aa9edda0da322
3 files changed