Remove ConstantExpression.value

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

Index: pkg/compiler/lib/src/cps_ir/type_propagation.dart
diff --git a/pkg/compiler/lib/src/cps_ir/type_propagation.dart b/pkg/compiler/lib/src/cps_ir/type_propagation.dart
index 3d3f98d31af4a0a94ac0158dd65580556db5ac24..a3a1c4528c3f73b63711d421cd293ad2c43b37f4 100644
--- a/pkg/compiler/lib/src/cps_ir/type_propagation.dart
+++ b/pkg/compiler/lib/src/cps_ir/type_propagation.dart
@@ -209,7 +209,7 @@ class _TransformingVisitor<T> extends RecursiveVisitor {
     PrimitiveConstantValue primitiveConstant = value.constant;
     ConstantExpression constExp =
         const ConstantExpressionCreator().convert(primitiveConstant);
-    Constant constant = new Constant(constExp);
+    Constant constant = new Constant(constExp, primitiveConstant);
     LetPrim letPrim = new LetPrim(constant);
     InvokeContinuation invoke =
         new InvokeContinuation(continuation, <Primitive>[constant]);
@@ -988,7 +988,7 @@ class ConstantExpressionCreator
 
   @override
   ConstantExpression visitBool(BoolConstantValue constant, _) {
-    return new BoolConstantExpression(constant.primitiveValue, constant);
+    return new BoolConstantExpression(constant.primitiveValue);
   }
 
   @override
@@ -1003,7 +1003,7 @@ class ConstantExpressionCreator
 
   @override
   ConstantExpression visitDouble(DoubleConstantValue constant, arg) {
-    return new DoubleConstantExpression(constant.primitiveValue, constant);
+    return new DoubleConstantExpression(constant.primitiveValue);
   }
 
   @override
@@ -1018,7 +1018,7 @@ class ConstantExpressionCreator
 
   @override
   ConstantExpression visitInt(IntConstantValue constant, arg) {
-    return new IntConstantExpression(constant.primitiveValue, constant);
+    return new IntConstantExpression(constant.primitiveValue);
   }
 
   @override
@@ -1038,13 +1038,13 @@ class ConstantExpressionCreator
 
   @override
   ConstantExpression visitNull(NullConstantValue constant, arg) {
-    return new NullConstantExpression(constant);
+    return new NullConstantExpression();
   }
 
   @override
   ConstantExpression visitString(StringConstantValue constant, arg) {
     return new StringConstantExpression(
-        constant.primitiveValue.slowToString(), constant);
+        constant.primitiveValue.slowToString());
   }
 
   @override