[Mlir-commits] [mlir] [mlir][Interfaces] `CallOpInterface`: Model forwarded result + improve verification (PR #214724)

[Mehdi Amini]

================
@@ -129,6 +168,16 @@ def CallOpInterface : OpInterface<"CallOpInterface",
       /*methodBody=*/[{}], /*defaultImplementation=*/[{
         return ::mlir::call_interface_impl::resolveCallable($_op);
       }]
+    >,
+    InterfaceMethod<[{
+        Compares types across the call boundary for compatibility: the type of
+        a forwarded operand against the type of the corresponding callee
+        argument, and the type of a forwarded result against the type of the
+        corresponding callee result.
+      }],
+      "bool", "areTypesCompatible",
+      (ins "::mlir::Type":$callerType, "::mlir::Type":$calleeType),
+      /*methodBody=*/[{}], /*defaultImplementation=*/[{ return true; }]
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joker-eph wrote:

Why do we need to add this method right now?

Also why not default to `callerType == calleeType` ?

https://github.com/llvm/llvm-project/pull/214724