This patch is an effort to simplify cascading jumps to return label in such case:

src/full-codegen.h

Index: src/full-codegen.h
===================================================================
--- src/full-codegen.h	(revision 11089)
+++ src/full-codegen.h	(working copy)
@@ -91,7 +91,8 @@
         type_feedback_cells_(info->HasDeoptimizationSupport()
                              ? info->function()->ast_node_count() : 0),
         ic_total_count_(0),
-        has_self_optimization_header_(false) { }
+        has_self_optimization_header_(false),
+        immediate_return_enabled_(false) { }
 
   static bool MakeCode(CompilationInfo* info);
 
@@ -562,6 +563,8 @@
   FunctionLiteral* function() { return info_->function(); }
   Scope* scope() { return scope_; }
 
+  bool immediate_return_enabled() { return immediate_return_enabled_; }
+
   static Register result_register();
   static Register context_register();
 
@@ -666,6 +669,9 @@
     // it.  Only used for asserts.
     virtual bool IsTest() const { return false; }
 
+    // Returns true if we are branching on the value that can be returned.
+    virtual bool IsReturnable() const { return false; }
+
    protected:
     FullCodeGenerator* codegen() const { return codegen_; }
     MacroAssembler* masm() const { return masm_; }
@@ -695,6 +701,9 @@
                              Label** if_false,
                              Label** fall_through) const;
     virtual bool IsAccumulatorValue() const { return true; }
+    virtual bool IsReturnable() const {
+      return codegen()->immediate_return_enabled();
+    }
   };
 
   class StackValueContext : public ExpressionContext {
@@ -784,6 +793,36 @@
     virtual bool IsEffect() const { return true; }
   };
 
+  class ImmediateReturnEnabled {
+   public:
+    explicit ImmediateReturnEnabled(FullCodeGenerator* codegen)
+      : codegen_(codegen), old_(codegen->immediate_return_enabled_) {
+        codegen_->immediate_return_enabled_ = true;
+    }
+    virtual ~ImmediateReturnEnabled() {
+        codegen_->immediate_return_enabled_ = old_;
+    }
+
+   private:
+    FullCodeGenerator* codegen_;
+    bool old_;
+  };
+
+  class ImmediateReturnDisabled {
+   public:
+    explicit ImmediateReturnDisabled(FullCodeGenerator* codegen)
+      : codegen_(codegen), old_(codegen->immediate_return_enabled_) {
+        codegen_->immediate_return_enabled_ = false;
+    }
+    virtual ~ImmediateReturnDisabled() {
+        codegen_->immediate_return_enabled_ = old_;
+    }
+
+   private:
+    FullCodeGenerator* codegen_;
+    bool old_;
+  };
+
   MacroAssembler* masm_;
   CompilationInfo* info_;
   Scope* scope_;
@@ -799,6 +838,7 @@
   bool has_self_optimization_header_;
   Handle<FixedArray> handler_table_;
   Handle<JSGlobalPropertyCell> profiling_counter_;
+  bool immediate_return_enabled_;
 
   friend class NestedStatement;