CPS implementation of throw and rethrow.

pkg/compiler/lib/src/tree_ir/tree_ir_tracer.dart

Index: pkg/compiler/lib/src/tree_ir/tree_ir_tracer.dart
diff --git a/pkg/compiler/lib/src/tree_ir/tree_ir_tracer.dart b/pkg/compiler/lib/src/tree_ir/tree_ir_tracer.dart
index e3a431896130f48bfe037ee8908e2c0db043a97c..703885ee072af7ddbcda6f8b6a1853bc39988ad4 100644
--- a/pkg/compiler/lib/src/tree_ir/tree_ir_tracer.dart
+++ b/pkg/compiler/lib/src/tree_ir/tree_ir_tracer.dart
@@ -80,6 +80,14 @@ class BlockCollector extends StatementVisitor {
     _addStatement(node);
   }
 
+  visitThrow(Throw node) {
+    _addStatement(node);
+  }
+
+  visitRethrow(Rethrow node) {
+    _addStatement(node);
+  }
+
   visitBreak(Break node) {
     _addStatement(node);
     blocks.last.addEdgeTo(breakTargets[node.target]);
@@ -264,6 +272,14 @@ class TreeTracer extends TracerUtil with StatementVisitor {
     printStatement(null, "return ${expr(node.value)}");
   }
 
+  visitThrow(Throw node) {
+    printStatement(null, "throw ${expr(node.value)}");
+  }
+
+  visitRethrow(Rethrow node) {
+    printStatement(null, "rethrow");
+  }
+
   visitBreak(Break node) {
     printStatement(null, "break ${collector.breakTargets[node.target].name}");
   }