[llvm] [LLVM][CodeGen][SVE] Only use unpredicated bfloat instructions when all lanes are in use. (PR #168387)

[David Green via llvm-commits]

davemgreen wrote:

Yeah everything I talked about was the way things did / currently work, not how they might work in the future. Adding support for strict-fp certainly sounds good. I had seen the strict-fp intrinsics being converted to standard nodes for unsupported operations in the past and been surprised by it, it did not sound very sound. It looks like most vector operations will currently try to unroll. https://godbolt.org/z/Y7vbq7Tj3

https://github.com/llvm/llvm-project/pull/168387