[llvm] Support CSA for floating-point & pointer types (PR #182313)

[Benjamin Maxwell via llvm-commits]

MacDue wrote:

It may also be worth adding a couple of float/pointer tests to: https://github.com/llvm/llvm-test-suite/blob/main/MicroBenchmarks/LoopVectorization/ConditionalScalarAssignment.cpp

https://github.com/llvm/llvm-project/pull/182313