[mlir] Fix deprecated pointer union casts in toy example (llvm#124422)

Author: kuhar

mlir/examples/toy/Ch4/mlir/Dialect.cpp

@@ -333,7 +333,7 @@ CallInterfaceCallable GenericCallOp::getCallableForCallee() {
 /// Set the callee for the generic call operation, this is required by the call
 /// interface.
 void GenericCallOp::setCalleeFromCallable(CallInterfaceCallable callee) {
-  (*this)->setAttr("callee", callee.get<SymbolRefAttr>());
+  (*this)->setAttr("callee", cast<SymbolRefAttr>(callee));
 }
 
 /// Get the argument operands to the called function, this is required by the

mlir/examples/toy/Ch5/mlir/Dialect.cpp

@@ -333,7 +333,7 @@ CallInterfaceCallable GenericCallOp::getCallableForCallee() {
 /// Set the callee for the generic call operation, this is required by the call
 /// interface.
 void GenericCallOp::setCalleeFromCallable(CallInterfaceCallable callee) {
-  (*this)->setAttr("callee", callee.get<SymbolRefAttr>());
+  (*this)->setAttr("callee", cast<SymbolRefAttr>(callee));
 }
 
 /// Get the argument operands to the called function, this is required by the

mlir/examples/toy/Ch6/mlir/Dialect.cpp

@@ -333,7 +333,7 @@ CallInterfaceCallable GenericCallOp::getCallableForCallee() {
 /// Set the callee for the generic call operation, this is required by the call
 /// interface.
 void GenericCallOp::setCalleeFromCallable(CallInterfaceCallable callee) {
-  (*this)->setAttr("callee", callee.get<SymbolRefAttr>());
+  (*this)->setAttr("callee", cast<SymbolRefAttr>(callee));
 }
 
 /// Get the argument operands to the called function, this is required by the

mlir/examples/toy/Ch7/mlir/Dialect.cpp

@@ -367,7 +367,7 @@ CallInterfaceCallable GenericCallOp::getCallableForCallee() {
 /// Set the callee for the generic call operation, this is required by the call
 /// interface.
 void GenericCallOp::setCalleeFromCallable(CallInterfaceCallable callee) {
-  (*this)->setAttr("callee", callee.get<SymbolRefAttr>());
+  (*this)->setAttr("callee", cast<SymbolRefAttr>(callee));
 }
 
 /// Get the argument operands to the called function, this is required by the