[llvm] [SandboxIR] sandboxir::Use operands (part 1) and uses (part 2) (PR #98251)

[Thorsten Schütt via llvm-commits]

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@@ -174,9 +334,61 @@ class User : public Value {
 protected:
   User(ClassID ID, llvm::Value *V, Context &Ctx) : Value(ID, V, Ctx) {}
 
+  /// \Returns the SBUse edge that corresponds to \p OpIdx.
+  /// Note: This is the default implementation that works for instructions that
+  /// match the underlying LLVM instruction. All others should use a different
+  /// implementation.
+  Use getOperandUseDefault(unsigned OpIdx, bool Verify) const;
+  virtual Use getOperandUseInternal(unsigned OpIdx, bool Verify) const = 0;
+  friend class OperandUseIterator; // for getOperandUseInternal()
+
+  /// The default implementation works only for single-LLVMIR-instruction
+  /// SBUsers and only if they match exactly the LLVM instruction.
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tschuett wrote:

`SBUser` leftover with `SB` .

https://github.com/llvm/llvm-project/pull/98251