dart2js cps: Streamline expressions and primitives.

pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart

Index: pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart
diff --git a/pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart b/pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart
index 0064b6bf0bc0ff25d28b9d1e1cb3d21df5754312..c12affd6b3f8551661ea65ac2099997be861d653 100644
--- a/pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart
+++ b/pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart
@@ -228,11 +228,9 @@ class IRTracer extends TracerUtil implements cps_ir.Visitor {
   }
 
   visitSetMutableVariable(cps_ir.SetMutableVariable node) {
-    String dummy = names.name(node);
     String variable = names.name(node.variable.definition);
     String value = formatReference(node.value);
-    printStmt(dummy, 'SetMutableVariable $variable := $value');
-    visit(node.body);
+    return 'SetMutableVariable $variable := $value';
   }
 
   String formatReference(cps_ir.Reference ref) {
@@ -267,12 +265,10 @@ class IRTracer extends TracerUtil implements cps_ir.Visitor {
   }
 
   visitSetField(cps_ir.SetField node) {
-    String dummy = names.name(node);
     String object = formatReference(node.object);
     String field = node.field.name;
     String value = formatReference(node.value);
-    printStmt(dummy, 'SetField $object.$field = $value');
-    visit(node.body);
+    return 'SetField $object.$field = $value';
   }
 
   visitGetField(cps_ir.GetField node) {
@@ -287,11 +283,9 @@ class IRTracer extends TracerUtil implements cps_ir.Visitor {
   }
 
   visitSetStatic(cps_ir.SetStatic node) {
-    String dummy = names.name(node);
     String element = node.element.name;
     String value = formatReference(node.value);
-    printStmt(dummy, 'SetStatic $element = $value');
-    visit(node.body);
+    return 'SetStatic $element = $value';
   }
 
   visitGetLazyStatic(cps_ir.GetLazyStatic node) {
@@ -523,18 +517,6 @@ class BlockCollector implements cps_ir.Visitor {
   visitUnreachable(cps_ir.Unreachable node) {
   }
 
-  visitSetMutableVariable(cps_ir.SetMutableVariable exp) {
-    visit(exp.body);
-  }
-
-  visitSetField(cps_ir.SetField exp) {
-    visit(exp.body);
-  }
-
-  visitSetStatic(cps_ir.SetStatic exp) {
-    visit(exp.body);
-  }
-
   visitGetLazyStatic(cps_ir.GetLazyStatic exp) {
     addEdgeToContinuation(exp.continuation);
   }
@@ -659,6 +641,18 @@ class BlockCollector implements cps_ir.Visitor {
     unexpectedNode(node);
   }
 
+  visitSetMutableVariable(cps_ir.SetMutableVariable node) {
+    unexpectedNode(node);
+  }
+
+  visitSetField(cps_ir.SetField node) {
+    unexpectedNode(node);
+  }
+
+  visitSetStatic(cps_ir.SetStatic node) {
+    unexpectedNode(node);
+  }
+
   @override
   visitForeignCode(cps_ir.ForeignCode node) {
     if (node.continuation != null) {