[msan][NFCI] Add tests for Arm NEON floating-point min/max (vector) (#125729)
Currently handled (suboptimally) by handleUnknownInstruction:
- llvm.aarch64.neon.fmaxv (Floating-point Maximum (vector))
- llvm.aarch64.neon.fminv
- llvm.aarch64.neon.fmaxnmv (Floating-point Maximum Number across
Vector)
- llvm.aarch64.neon.fminnmv
(not to be mistaken with llvm.aarch64.neon.f{max,min}, which are
correctly handled by `maybeHandleSimpleNomemIntrinsic`)
Forked from llvm/test/CodeGen/AArch64/arm64-fminv.ll