[llvm] Introduce DIExpressionOptimizer (PR #69769)

[Adrian Prantl via llvm-commits]

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@@ -3073,6 +3073,109 @@ template <> struct DenseMapInfo<DIExpression::FragmentInfo> {
   static bool isEqual(const FragInfo &A, const FragInfo &B) { return A == B; }
 };
 
+class DIExpressionOptimizer {
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adrian-prantl wrote:

Can you add a Doxygen comment for the entire class with just a sentence on what this does?

https://github.com/llvm/llvm-project/pull/69769