Simplify pending message script handling.

src/compiler/ast-graph-builder.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/ast-graph-builder.h"
 
 #include "src/compiler.h"
 #include "src/compiler/ast-loop-assignment-analyzer.h"
 #include "src/compiler/control-builders.h"
 #include "src/compiler/linkage.h"
@@ skipping 1248 matching lines @@
 }
 
 
 void AstGraphBuilder::VisitTryFinallyStatement(TryFinallyStatement* stmt) {
   TryFinallyBuilder try_control(this);
 
   ExternalReference message_object =
       ExternalReference::address_of_pending_message_obj(isolate());
   ExternalReference message_present =
       ExternalReference::address_of_has_pending_message(isolate());
-  ExternalReference message_script =
-      ExternalReference::address_of_pending_message_script(isolate());
 
   // We keep a record of all paths that enter the finally-block to be able to
   // dispatch to the correct continuation point after the statements in the
   // finally-block have been evaluated.
   //
   // The try-finally construct can enter the finally-block in three ways:
   // 1. By exiting the try-block normally, falling through at the end.
   // 2. By exiting the try-block with a function-local control flow transfer
   //    (i.e. through break/continue/return statements).
   // 3. By exiting the try-block with a thrown exception.
@@ skipping 17 matching lines @@
   //  - Falling through into finally-block: Filled with the hole.
   Node* result = try_control.GetResultValueNode();
   Node* token = try_control.GetDispatchTokenNode();
 
   // The result value, dispatch token and message is expected on the operand
   // stack (this is in sync with FullCodeGenerator::EnterFinallyBlock).
   environment()->Push(token);  // TODO(mstarzinger): Cook token!
   environment()->Push(result);
   environment()->Push(BuildLoadExternal(message_object, kMachAnyTagged));
   environment()->Push(BuildLoadExternal(message_present, kMachBool));
-  environment()->Push(BuildLoadExternal(message_script, kMachAnyTagged));
 
   // Evaluate the finally-block.
   Visit(stmt->finally_block());
   try_control.EndFinally();
 
   // The result value, dispatch token and message is restored from the operand
   // stack (this is in sync with FullCodeGenerator::ExitFinallyBlock).
-  BuildStoreExternal(message_script, kMachAnyTagged, environment()->Pop());
   BuildStoreExternal(message_present, kMachBool, environment()->Pop());
   BuildStoreExternal(message_object, kMachAnyTagged, environment()->Pop());
   result = environment()->Pop();
   token = environment()->Pop();  // TODO(mstarzinger): Uncook token!
 
   // Dynamic dispatch after the finally-block.
   commands->ApplyDeferredCommands(token, result);
 
   // TODO(mstarzinger): Remove bailout once everything works.
   if (!FLAG_turbo_exceptions) SetStackOverflow();
@@ skipping 2010 matching lines @@
     // Phi does not exist yet, introduce one.
     value = NewPhi(inputs, value, control);
     value->ReplaceInput(inputs - 1, other);
   }
   return value;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8