Fast codegen: Implement with.

src/compiler.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 685 matching lines @@
 void CodeGenSelector::VisitBreakStatement(BreakStatement* stmt) {
 }
 
 
 void CodeGenSelector::VisitReturnStatement(ReturnStatement* stmt) {
   ProcessExpression(stmt->expression(), Expression::kValue);
 }
 
 
 void CodeGenSelector::VisitWithEnterStatement(WithEnterStatement* stmt) {
-  BAILOUT("WithEnterStatement");
+  ProcessExpression(stmt->expression(), Expression::kValue);
 }
 
 
 void CodeGenSelector::VisitWithExitStatement(WithExitStatement* stmt) {
-  BAILOUT("WithExitStatement");
+  // Supported.
 }
 
 
 void CodeGenSelector::VisitSwitchStatement(SwitchStatement* stmt) {
   BAILOUT("SwitchStatement");
 }
 
 
 void CodeGenSelector::VisitDoWhileStatement(DoWhileStatement* stmt) {
   // We do not handle loops with breaks or continue statements in their
@@ skipping 387 matching lines @@
 
 void CodeGenSelector::VisitThisFunction(ThisFunction* expr) {
   // ThisFunction is supported.
 }
 
 #undef BAILOUT
 #undef CHECK_BAILOUT
 
 
 } }  // namespace v8::internal