[llvm] [Analysis] Extract KnownFPClass (PR #133457)

[Matt Arsenault via llvm-commits]

================
@@ -0,0 +1,237 @@
+//===- llvm/Support/KnownFPClass.h - Stores known fplcass -------*- C++ -*-===//
----------------
arsenm wrote:

```suggestion
//===- llvm/Support/KnownFPClass.h - Stores known fpclass -------*- C++ -*-===//
```

https://github.com/llvm/llvm-project/pull/133457