Cleanup the isolate library to pave the way for web worker support.

sdk/lib/_internal/compiler/implementation/ssa/builder.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of ssa;
 
 /**
  * A special element for the extra parameter taken by intercepted
  * methods. We need to override [Element.computeType] because our
  * optimizers may look at its declared type.
@@ skipping 3093 matching lines @@
     }
     visit(closure);
     List<HInstruction> inputs = <HInstruction>[pop()];
     String invocationName = backend.namer.closureInvocationName(
         new Selector.callClosure(params.requiredParameterCount));
     push(new HForeign(new DartString.literal('#.$invocationName'),
                       const LiteralDartString('var'),
                       inputs));
   }
 
+  void handleForeignSetCurrentIsolate(Send node) {
+    if (node.arguments.isEmpty || !node.arguments.tail.isEmpty) {
+      compiler.cancel('Exactly one argument required',
+                      node: node.argumentsNode);
+    }
+    visit(node.arguments.head);
+    String isolateName = backend.namer.CURRENT_ISOLATE;
+    push(new HForeign(new DartString.literal("$isolateName = #"),
+                      const LiteralDartString('void'),
+                      <HInstruction>[pop()]));
+  }
+
+  void handleForeignCreateIsolate(Send node) {
+    if (!node.arguments.isEmpty) {
+      compiler.cancel('Too many arguments',
+                      node: node.argumentsNode);
+    }
+    String constructorName = backend.namer.isolateName;
+    push(new HForeign(new DartString.literal("new $constructorName"),
+                      const LiteralDartString('var'),
+                      <HInstruction>[]));
+  }
+
   visitForeignSend(Send node) {
     Selector selector = elements.getSelector(node);
     SourceString name = selector.name;
     if (name == const SourceString('JS')) {
       handleForeignJs(node);
     } else if (name == const SourceString('UNINTERCEPTED')) {
       handleForeignUnintercepted(node);
     } else if (name == const SourceString('JS_HAS_EQUALS')) {
       handleForeignJsHasEquals(node);
     } else if (name == const SourceString('JS_CURRENT_ISOLATE')) {
       handleForeignJsCurrentIsolate(node);
     } else if (name == const SourceString('JS_CALL_IN_ISOLATE')) {
       handleForeignJsCallInIsolate(node);
     } else if (name == const SourceString('DART_CLOSURE_TO_JS')) {
       handleForeignDartClosureToJs(node);
+    } else if (name == const SourceString('JS_SET_CURRENT_ISOLATE')) {
+      handleForeignSetCurrentIsolate(node);
+    } else if (name == const SourceString('JS_CREATE_ISOLATE')) {
+      handleForeignCreateIsolate(node);
     } else {
       throw "Unknown foreign: ${selector}";
     }
   }
 
   generateSuperNoSuchMethodSend(Send node) {
     Selector selector = elements.getSelector(node);
     SourceString name = selector.name;
 
     ClassElement cls = work.element.getEnclosingClass();
@@ skipping 1935 matching lines @@
           new HSubGraphBlockInformation(elseBranch.graph));
 
     HBasicBlock conditionStartBlock = conditionBranch.block;
     conditionStartBlock.setBlockFlow(info, joinBlock);
     SubGraph conditionGraph = conditionBranch.graph;
     HIf branch = conditionGraph.end.last;
     assert(branch is HIf);
     branch.blockInformation = conditionStartBlock.blockFlow;
   }
 }