[interpreter] Deprecate notion of an unreachable environment.

src/compiler/bytecode-graph-builder.h

Index: src/compiler/bytecode-graph-builder.h
diff --git a/src/compiler/bytecode-graph-builder.h b/src/compiler/bytecode-graph-builder.h
index a25f3a2037d5002906a4232100b46b5311adfc5b..d93a8e4a9a7962387ebde9f0a2ebbee058f99ab5 100644
--- a/src/compiler/bytecode-graph-builder.h
+++ b/src/compiler/bytecode-graph-builder.h
@@ -107,9 +107,6 @@ class BytecodeGraphBuilder {
   Node* MakeNode(const Operator* op, int value_input_count, Node** value_inputs,
                  bool incomplete);
 
-  // Helper to indicate a node exits the function body.
-  void UpdateControlDependencyToLeaveFunction(Node* exit);
-
   Node** EnsureInputBufferSize(int size);
 
   Node* ProcessCallArguments(const Operator* call_op, Node* callee,
@@ -139,10 +136,11 @@ class BytecodeGraphBuilder {
   void BuildCallRuntime();
   void BuildCallRuntimeForPair();
   void BuildCallConstruct();
+  void BuildThrowOp(const Operator* op);
   void BuildBinaryOp(const Operator* op);
   void BuildCompareOp(const Operator* op);
   void BuildDelete();
-  void BuildCastOperator(const Operator* js_op);
+  void BuildCastOperator(const Operator* op);
   void BuildForInPrepare();
   void BuildForInNext();
 
@@ -157,6 +155,9 @@ class BytecodeGraphBuilder {
   void BuildLoopHeaderEnvironment(int current_offset);
   void SwitchToMergeEnvironment(int current_offset);
 
+  // Simulates control flow that exits the function body.
+  void MergeControlToLeaveFunction(Node* exit);
+
   // Simulates entry and exit of exception handlers.
   void EnterAndExitExceptionHandlers(int current_offset);