[llvm] [HEXAGON] Fix semantics of ordered FP compares (PR #131089)

[via llvm-commits]

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+; RUN: llc -march=hexagon < %s | FileCheck %s
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aankit-ca wrote:

This nan check is not needed for vector fp comparisons. The `vcmp.gt` instruction returns false if any of the values are nan's. There's already a lit test to check this here: https://github.com/llvm/llvm-project/blob/main/llvm/test/CodeGen/Hexagon/autohvx/vector-compare-float.ll

https://github.com/llvm/llvm-project/pull/131089