[clang] [Clang][RISCV] Add operator overloading for builtin RVV vector types (PR #192722)

[Craig Topper via cfe-commits]

topperc wrote:

> The SVE support generates unsigned comparison predicates for comparisons of signed types. This looks very unintuitive to me, so I changed it to use signed comparisons. I think the SVE case may just be a bug?

The result is boolean, the signedness of the input shouldn't have any effect on the output type. Are comparisons of unsigned inputs using unsigned types? What does floating point compare return?

https://github.com/llvm/llvm-project/pull/192722