dart2js cps: Refactor CallExpressions into 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 79164b513284bfd983b04a3eef9e896e64451277..2dfa25a713387081c717f5fa39c0ca2d3a6242df 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
@@ -125,26 +125,23 @@ class SExpressionStringifier extends Indentation implements Visitor<String> {
 
   String visitInvokeStatic(InvokeStatic node) {
     String name = node.target.name;
-    String cont = access(node.continuation);
     String args = formatArguments(node.selector.callStructure, node.arguments);
-    return '$indentation(InvokeStatic $name $args $cont)';
+    return '(InvokeStatic $name $args)';
   }
 
   String visitInvokeMethod(InvokeMethod node) {
     String name = node.selector.name;
     String rcv = access(node.receiver);
-    String cont = access(node.continuation);
     String args = formatArguments(node.selector.callStructure, node.arguments,
         isIntercepted: node.receiverIsIntercepted);
-    return '$indentation(InvokeMethod $rcv $name $args $cont)';
+    return '(InvokeMethod $rcv $name $args)';
   }
 
   String visitInvokeMethodDirectly(InvokeMethodDirectly node) {
     String receiver = access(node.receiver);
     String name = node.selector.name;
-    String cont = access(node.continuation);
     String args = formatArguments(node.selector.callStructure, node.arguments);
-    return '$indentation(InvokeMethodDirectly $receiver $name $args $cont)';
+    return '(InvokeMethodDirectly $receiver $name $args)';
   }
 
   String visitInvokeConstructor(InvokeConstructor node) {
@@ -164,9 +161,8 @@ class SExpressionStringifier extends Indentation implements Visitor<String> {
     } else {
       callName = '${className}.${node.target.name}';
     }
-    String cont = access(node.continuation);
     String args = formatArguments(node.selector.callStructure, node.arguments);
-    return '$indentation(InvokeConstructor $callName $args $cont)';
+    return '(InvokeConstructor $callName $args)';
   }
 
   String visitInvokeContinuation(InvokeContinuation node) {
@@ -232,10 +228,8 @@ class SExpressionStringifier extends Indentation implements Visitor<String> {
 
   String visitTypeCast(TypeCast node) {
     String value = access(node.value);
-    String cont = access(node.continuation);
     String typeArguments = node.typeArguments.map(access).join(' ');
-    return '$indentation(TypeCast $value ${node.dartType}'
-                         ' ($typeArguments) $cont)';
+    return '(TypeCast $value ${node.dartType} ($typeArguments))';
   }
 
   String visitTypeTest(TypeTest node) {
@@ -289,8 +283,7 @@ class SExpressionStringifier extends Indentation implements Visitor<String> {
 
   String visitGetLazyStatic(GetLazyStatic node) {
     String element = node.element.name;
-    String cont = access(node.continuation);
-    return '$indentation(GetLazyStatic $element $cont)';
+    return '(GetLazyStatic $element)';
   }
 
   String visitCreateBox(CreateBox node) {
@@ -342,10 +335,7 @@ class SExpressionStringifier extends Indentation implements Visitor<String> {
 
   String visitForeignCode(ForeignCode node) {
     String arguments = node.arguments.map(access).join(' ');
-    String continuation = node.continuation == null ? ''
-        : ' ${access(node.continuation)}';
-    return '$indentation(JS "${node.codeTemplate.source}"'
-        ' ($arguments)$continuation)';
+    return '(JS "${node.codeTemplate.source}" ($arguments))';
   }
 
   String visitGetLength(GetLength node) {
@@ -369,15 +359,13 @@ class SExpressionStringifier extends Indentation implements Visitor<String> {
   @override
   String visitAwait(Await node) {
     String value = access(node.input);
-    String continuation = access(node.continuation);
-    return '(Await $value $continuation)';
+    return '(Await $value)';
   }
 
   @override
   String visitYield(Yield node) {
     String value = access(node.input);
-    String continuation = access(node.continuation);
-    return '(Yield $value $continuation)';
+    return '(Yield $value)';
   }
 
   String visitRefinement(Refinement node) {