[clang] [clang] Set FPOptions at the beginning of CompoundStmt (PR #111654)

[Serge Pavlov via cfe-commits]

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@@ -1684,6 +1684,15 @@ class CompoundStmt final
     return hasStoredFPFeatures() ? getStoredFPFeatures() : FPOptionsOverride();
   }
 
+  /// Get FPOptions inside this statement. They may differ from the outer
+  /// options due to pragmas.
+  /// \param CurFPOptions FPOptions outside this statement.
+  FPOptions getInsideFPOptions(FPOptions CurFPOptions) const {
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spavloff wrote:

I renamed it to `getActiveFPOptions`. If you have ideas how to make it better, please share.

A name that refers to `StoredFPFeatures` is a bit misleading, because AST nodes already have method `getStoredFPFeatures`, which reports the stored FP features in the form of `FPOptionsOverride`. 

https://github.com/llvm/llvm-project/pull/111654