If a check-suffix is only required for a CHECK-FIXES or CHECK-MESSAGES. check_clang_tidy will pass the prefixes CHECK-FIXES<...> and CHECK-MESSAGES<...> to FileCheck.
This will result in a FileCheck failing because of an unused prefix.
This addresses the problem by not passing unused prefixes. Its also possible to fix this be passing `--allow-unused-prefixes` flag to FileCheck, but seeing as we have already done the legwork in the script to see its unused, this fix seems the better way to go.
Reviewed By: aaron.ballman
Differential Revision: https://reviews.llvm.org/D97322
Enables support for transforming loops of the form
```
for (auto I = Cont.rbegin(), E = Cont.rend(); I != E;++I)
```
This is done automatically in C++20 mode using `std::ranges::reverse_view` but there are options to specify a different function to reverse iterator over a container.
This is the first step, down the line I'd like to possibly extend this support for array based loops
```
for (unsigned I = Arr.size() - 1;I >=0;--I) Arr[I]...
```
Currently if you pass a reversing function with no header in the options it will just assume that the function exists, however as we have the ASTContext it may be as wise to check before applying, or at least lower the confidence level if we can't find it.
Reviewed By: alexfh
Differential Revision: https://reviews.llvm.org/D82089
Nathan James