Free the memory allocated by mlirOperationStateAddXXX methods in mlirOperationCreate.

Previously, the memory leaks on heap. Since the MlirOperationState is not intended to be used again after mlirOperationCreate, the patch simplify frees the memory in mlirOperationCreate instead of creating any new API.

Reviewed By: ftynse

Differential Revision: https://reviews.llvm.org/D85629

Author: jingpu

mlir/lib/CAPI/IR/IR.cpp

@@ -176,6 +176,12 @@ MlirOperation mlirOperationCreate(const MlirOperationState *state) {
   for (unsigned i = 0; i < state->nRegions; ++i)
     cppState.addRegion(std::unique_ptr<Region>(unwrap(state->regions[i])));
 
+  free(state->results);
+  free(state->operands);
+  free(state->regions);
+  free(state->successors);
+  free(state->attributes);
+
   return wrap(Operation::create(cppState));
 }