[clang] [llvm] [C++23] [CLANG] Adding C++23 constexpr math functions: fmin, fmax and frexp. (PR #88978)

[Hubert Tong via cfe-commits]

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@@ -951,6 +951,19 @@ class APFloat : public APFloatBase {
 
   bool needsCleanup() const { APFLOAT_DISPATCH_ON_SEMANTICS(needsCleanup()); }
 
+  //  Checks that the value x is in the range (-1;-0.5], [0.5; 1)
+  static bool isInRange(const llvm::APFloat &x) {
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hubert-reinterpretcast wrote:

I don't think this should be a member function of `APFloat`. It can be an implementation detail of `ExprConstant.cpp`. In either case, the function should be named something like `isInFrexpResultRange`.

https://github.com/llvm/llvm-project/pull/88978