[lldb] [llvm] [mlir] [libc] [clang] [NFC][ObjectSizeOffset] Use classes instead of std::pair (PR #76882)

[Bill Wendling via cfe-commits]

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@@ -187,80 +187,124 @@ Value *lowerObjectSizeCall(
     const TargetLibraryInfo *TLI, AAResults *AA, bool MustSucceed,
     SmallVectorImpl<Instruction *> *InsertedInstructions = nullptr);
 
-using SizeOffsetType = std::pair<APInt, APInt>;
+/// SizeOffsetType - A base template class for the object size visitors. Used
+/// here as a self-documenting way to handle the values rather than using a
+/// \p std::pair.
+template <typename T> struct SizeOffsetType {
+  T Size;
+  T Offset;
+
+  SizeOffsetType() = default;
+  SizeOffsetType(T Size, T Offset) : Size(Size), Offset(Offset) {}
+  virtual ~SizeOffsetType() = default;
+
+  virtual bool knownSize() const = 0;
+  virtual bool knownOffset() const = 0;
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bwendling wrote:

Good idea! :-) CRTP done.

https://github.com/llvm/llvm-project/pull/76882