[RFC] Associate AST nodes with HIstructions when building HGraph.

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 1166 matching lines @@
   void dup() {
     stack.add(stack.last());
   }
 
   HBoolify popBoolified() {
     HBoolify boolified = new HBoolify(pop());
     add(boolified);
     return boolified;
   }
 
+  HInstruction attachPosition(HInstruction target, Node node) {
+    target.sourcePosition = node.getBeginToken();
+    return target;
+  }
+
   void visit(Node node) {
     if (node !== null) node.accept(this);
   }
 
   visitBlock(Block node) {
     for (Link<Node> link = node.statements.nodes;
          !link.isEmpty();
          link = link.tail) {
       visit(link.head);
       if (isAborted()) {
@@ skipping 390 matching lines @@
     HNot not = new HNot(popBoolified());
     push(not);
   }
 
   void visitUnary(Send node, Operator op) {
     assert(node.argumentsNode is Prefix);
     visit(node.receiver);
     assert(op.token.kind !== PLUS_TOKEN);
     HInstruction operand = pop();
 
-    HInstruction target =
-        new HStatic(interceptors.getPrefixOperatorInterceptor(op));
+    HInstruction target = attachPosition(
+        new HStatic(interceptors.getPrefixOperatorInterceptor(op)), node);
     add(target);
     HInvokeUnary result;
     String value = op.source.stringValue;
     switch (value) {
       case "-": result = new HNegate(target, operand); break;
       case "~": result = new HBitNot(target, operand); break;
       default:
         compiler.internalError('Unexpected unary operator: $value.', node: op);
         break;
     }
@@ skipping 1960 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;
   }
 }