Add source mapping info to loops.

lib/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.
 
 class Interceptors {
   Compiler compiler;
   Interceptors(Compiler this.compiler);
 
   SourceString mapOperatorToMethodName(Operator op) {
     String name = op.source.stringValue;
@@ skipping 1376 matching lines @@
 
     endLoop(conditionBlock, conditionExitBlock, jumpHandler, savedLocals);
     HLoopBlockInformation info =
         new HLoopBlockInformation(
             HLoopBlockInformation.loopType(loop),
             wrapExpressionGraph(initializerGraph),
             wrapExpressionGraph(conditionExpression),
             wrapStatementGraph(bodyGraph),
             wrapExpressionGraph(updateGraph),
             conditionBlock.loopInformation.target,
-            conditionBlock.loopInformation.labels);
+            conditionBlock.loopInformation.labels,
+            loop);
 
     startBlock.setBlockFlow(info, current);
     loopInfo.loopBlockInformation = info;
   }
 
   visitFor(For node) {
     assert(node.body !== null);
     void buildInitializer() {
       if (node.initializer === null) return;
       Node initializer = node.initializer;
@@ skipping 106 matching lines @@
     SubGraph bodyGraph = new SubGraph(bodyEntryBlock, bodyExitBlock);
 
     HLoopBlockInformation loopBlockInfo =
         new HLoopBlockInformation(
             HLoopBlockInformation.DO_WHILE_LOOP,
             null,
             wrapExpressionGraph(conditionExpression),
             wrapStatementGraph(bodyGraph),
             null,
             loopEntryBlock.loopInformation.target,
-            loopEntryBlock.loopInformation.labels);
+            loopEntryBlock.loopInformation.labels,
+            node);
     loopEntryBlock.setBlockFlow(loopBlockInfo, current);
     loopInfo.loopBlockInformation = loopBlockInfo;
   }
 
   visitFunctionExpression(FunctionExpression node) {
     ClosureData nestedClosureData = builder.closureDataCache[node];
     if (nestedClosureData === null) {
       // TODO(floitsch): we can only assume that the reason for not having a
       // closure data here is, because the function is inside an initializer.
       compiler.unimplemented("Closures inside initializers", node: node);
@@ skipping 2048 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;
   }
 }