Adding support for multiple returns in compiled functions.

src/compiler/common-operator.h

Index: src/compiler/common-operator.h
diff --git a/src/compiler/common-operator.h b/src/compiler/common-operator.h
index 22490f7fe1ad682b7b67280642d0758d15fd5497..157fdd1cbe7f3aff421ca9202096484364dd59cf 100644
--- a/src/compiler/common-operator.h
+++ b/src/compiler/common-operator.h
@@ -121,7 +121,7 @@ class CommonOperatorBuilder final : public ZoneObject {
   const Operator* IfDefault();
   const Operator* Throw();
   const Operator* Deoptimize();
-  const Operator* Return();
+  const Operator* Return(int value_input_count = 1);
   const Operator* Terminate();
 
   const Operator* Start(int value_output_count);