[clang] [llvm] Implement operand bundles for floating-point operations (PR #109798)

[Serge Pavlov via cfe-commits]

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@@ -47,6 +47,15 @@ enum class RoundingMode : int8_t {
   Invalid = -1    ///< Denotes invalid value.
 };
 
+inline bool isValidRoundingMode(int X) {
+  return X >= 0 && X <= static_cast<int>(RoundingMode::Dynamic);
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spavloff wrote:

This is bad function name. Actually set of supported rounding modes depends on the used target. For example not every target supports rounding `NearestTiesToAway`. But any rounding mode must fit 3 bits. So the function is about loose validation.

If metadata will be used fo "fpe.round", this function would be unnecessary.

https://github.com/llvm/llvm-project/pull/109798