[llvm] [Hexagon] Fix PostRA QFP pass crash on pre-v79 targets (PR #206529)

[Fateme Hosseini via llvm-commits]

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@@ -0,0 +1,20 @@
+; Test that the PostRA QFP handle pass does not crash
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fhossein-quic wrote:

Done

https://github.com/llvm/llvm-project/pull/206529