[turbofan] Support lowering of ChangeFloat64ToTagged/ChangeTaggedToInt32.

test/compiler-unittests/common-operator-unittest.cc

Index: test/compiler-unittests/common-operator-unittest.cc
diff --git a/test/compiler-unittests/common-operator-unittest.cc b/test/compiler-unittests/common-operator-unittest.cc
index f034127f92c00b841f41b1861e776e399f427dca..79a34df2a997c0e5d1c2f09f7e69fe364291d571 100644
--- a/test/compiler-unittests/common-operator-unittest.cc
+++ b/test/compiler-unittests/common-operator-unittest.cc
@@ -10,6 +10,9 @@ namespace v8 {
 namespace internal {
 namespace compiler {
 
+static const int kArguments[] = {1, 5, 6, 42, 100, 10000, kMaxInt};
+
+
 CommonOperatorTest::CommonOperatorTest() : common_(zone()) {}
 
 
@@ -26,8 +29,19 @@ TEST_F(CommonOperatorTest, ControlEffect) {
 }
 
 
+TEST_F(CommonOperatorTest, ValueEffect) {
+  TRACED_FOREACH(int, arguments, kArguments) {
+    Operator* op = common()->ValueEffect(arguments);
+    EXPECT_EQ(arguments, OperatorProperties::GetValueInputCount(op));
+    EXPECT_EQ(arguments, OperatorProperties::GetTotalInputCount(op));
+    EXPECT_EQ(0, OperatorProperties::GetControlOutputCount(op));
+    EXPECT_EQ(1, OperatorProperties::GetEffectOutputCount(op));
+    EXPECT_EQ(0, OperatorProperties::GetValueOutputCount(op));
+  }
+}
+
+
 TEST_F(CommonOperatorTest, Finish) {
-  static const int kArguments[] = {1, 5, 6, 42, 100, 10000, kMaxInt};
   TRACED_FOREACH(int, arguments, kArguments) {
     Operator* op = common()->Finish(arguments);
     EXPECT_EQ(1, OperatorProperties::GetValueInputCount(op));