Switch-implementation.

frog/leg/ssa/codegen.dart

Index: frog/leg/ssa/codegen.dart
diff --git a/frog/leg/ssa/codegen.dart b/frog/leg/ssa/codegen.dart
index 3d235b59ca0d022cc58c9e0c85cbc2ff1400adec..d037ced0da86bbc2433f658080b563512ba27d1a 100644
--- a/frog/leg/ssa/codegen.dart
+++ b/frog/leg/ssa/codegen.dart
@@ -240,7 +240,7 @@ class SsaCodeGenerator implements HVisitor {
 
   void handleLabeledBlock(HLabeledBlockInformation labeledBlockInfo) {
     addIndentation();
-    for (SourceString label in labeledBlockInfo.labels) {
+    for (LabelElement label in labeledBlockInfo.labels) {
       addLabel(label);
       buffer.add(":");
     }
@@ -422,8 +422,8 @@ class SsaCodeGenerator implements HVisitor {
   // Used to write the name of labels.
   // The default implementation uses the unmodified Dart label name.
   // Specializations might change this.
-  void addLabel(SourceString label) {
-    buffer.add(label.slowToString());
+  void addLabel(LabelElement label) {
+    buffer.add(label.labelName);
   }
 
   visitBreak(HBreak node) {
@@ -671,7 +671,7 @@ class SsaCodeGenerator implements HVisitor {
     } else {
       buffer.add(compiler.namer.CURRENT_ISOLATE);
       buffer.add(".");
-      buffer.add(name);      
+      buffer.add(name);
     }
   }
 
@@ -1127,8 +1127,8 @@ class SsaOptimizedCodeGenerator extends SsaCodeGenerator {
 
   void beginLoop(HBasicBlock block) {
     addIndentation();
-    for (SourceString label in block.loopInformation.labels) {
-      buffer.add("${label.slowToString()}:");
+    for (LabelElement label in block.loopInformation.labels) {
+      buffer.add(label.labelName);
     }
     buffer.add('while (true) {\n');
     indent++;
@@ -1294,8 +1294,8 @@ class SsaUnoptimizedCodeGenerator extends SsaCodeGenerator {
   // Adds a "$" in front of names of labels from the original source.
   // This avoids conflicts with labels introduced by bailouts, which
   // starts with a non-"$" character.
-  void addLabel(SourceString label) {
-    buffer.add("\$$label");
+  void addLabel(LabelElement label) {
+    buffer.add("\$${label.labelName}");
   }
 
   void beginLoop(HBasicBlock block) {
@@ -1306,7 +1306,7 @@ class SsaUnoptimizedCodeGenerator extends SsaCodeGenerator {
     }
 
     addIndentation();
-    for (SourceString label in block.loopInformation.labels) {
+    for (LabelElement label in block.loopInformation.labels) {
       addLabel(label);
       buffer.add(":");
     }