Temp: add debug stub

Author: elsh

lib/SILOptimizer/IPO/CrossModuleOptimization.cpp

@@ -505,6 +505,25 @@ bool CrossModuleOptimization::canSerializeFunction(
       // are not covered in the visitor) can be serialized.
       if (!canSerializeFieldsByInstructionKind(&inst, canSerializeFlags, maxDepth))
         return false;
+
+      for (SILValue result : inst.getResults()) {
+        if (!canSerializeType(result->getType())) {
+          llvm::dbgs() << "\nChecking result: \n";
+          inst.dump();
+          llvm::dbgs() << "\nIn function: \n";
+          inst.getFunction()->dump();
+          return false;
+        }
+      }
+      for (Operand &op : inst.getAllOperands()) {
+        if (!canSerializeType(op.get()->getType())) {
+          llvm::dbgs() << "\nChecking operand: \n";
+          inst.dump();
+          llvm::dbgs() << "\nIn function: \n";
+          inst.getFunction()->dump();
+          return false;
+        }
+      }
     }
   }
   M.reclaimUnresolvedLocalArchetypeDefinitions();