dart2js cps: Streamline expressions and primitives.

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

Index: pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
diff --git a/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart b/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
index 8383af08dcac576f9382aef117f84b1294d5f130..b0b397e9b84f4269cbcd8da5e665f96ba87319e4 100644
--- a/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
+++ b/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
@@ -224,9 +224,7 @@ class SExpressionStringifier extends Indentation implements Visitor<String> {
 
   String visitSetMutableVariable(SetMutableVariable node) {
     String value = access(node.value);
-    String body = indentBlock(() => visit(node.body));
-    return '$indentation(SetMutableVariable ${access(node.variable)} '
-           '$value\n$body)';
+    return '(SetMutableVariable ${access(node.variable)} $value)';
   }
 
   String visitTypeCast(TypeCast node) {
@@ -262,8 +260,7 @@ class SExpressionStringifier extends Indentation implements Visitor<String> {
     String object = access(node.object);
     String field = node.field.name;
     String value = access(node.value);
-    String body = indentBlock(() => visit(node.body));
-    return '$indentation(SetField $object $field $value)\n$body';
+    return '(SetField $object $field $value)';
   }
 
   String visitGetField(GetField node) {
@@ -280,8 +277,7 @@ class SExpressionStringifier extends Indentation implements Visitor<String> {
   String visitSetStatic(SetStatic node) {
     String element = node.element.name;
     String value = access(node.value);
-    String body = indentBlock(() => visit(node.body));
-    return '$indentation(SetStatic $element $value\n$body)';
+    return '(SetStatic $element $value)';
   }
 
   String visitGetLazyStatic(GetLazyStatic node) {
@@ -335,7 +331,6 @@ class SExpressionStringifier extends Indentation implements Visitor<String> {
     return '(ApplyBuiltinOperator $operator ($args))';
   }
 
-  @override
   String visitForeignCode(ForeignCode node) {
     String arguments = node.arguments.map(access).join(' ');
     String continuation = node.continuation == null ? ''
@@ -343,20 +338,17 @@ class SExpressionStringifier extends Indentation implements Visitor<String> {
     return '(JS ${node.type} ${node.codeTemplate} ($arguments)$continuation)';
   }
 
-  @override
   String visitGetLength(GetLength node) {
     String object = access(node.object);
     return '(GetLength $object)';
   }
 
-  @override
   String visitGetIndex(GetIndex node) {
     String object = access(node.object);
     String index = access(node.index);
     return '(GetIndex $object $index)';
   }
 
-  @override
   String visitSetIndex(SetIndex node) {
     String object = access(node.object);
     String index = access(node.index);