[llvm] Introduce DIExpression::foldConstantMath() (PR #71718)

[Adrian Prantl via llvm-commits]

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@@ -3064,6 +3064,11 @@ class DIExpression : public MDNode {
   /// expression and constant on failure.
   std::pair<DIExpression *, const ConstantInt *>
   constantFold(const ConstantInt *CI);
+
+  /// Try to shorten an expression with constant math operations that can be
+  /// evaulated at compile time. Returns a new expression on success, or the old
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adrian-prantl wrote:

evaluated

https://github.com/llvm/llvm-project/pull/71718