[Mlir-commits] [mlir] [mlir][LLVM] Improve lowering of `llvm.byval` function arguments (PR #100028)

[River Riddle]

================
@@ -75,6 +76,10 @@ class TypeConverter {
     /// Return the argument types for the new signature.
     ArrayRef<Type> getConvertedTypes() const { return argTypes; }
 
+    /// Get the converted type for the given argument only if there is a
+    /// one-to-one mapping for it. Otherwise, return std::nullptr.
+    std::optional<Type> getConvertedType(unsigned inputo) const;
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River707 wrote:

```suggestion
    std::optional<Type> getConvertedType(unsigned input) const;
```

https://github.com/llvm/llvm-project/pull/100028