Revert of [turbofan] Remove left-over change bits from ChangeLowering.

test/cctest/compiler/test-representation-change.cc

Index: test/cctest/compiler/test-representation-change.cc
diff --git a/test/cctest/compiler/test-representation-change.cc b/test/cctest/compiler/test-representation-change.cc
index 76aa390491a700bb152596c5eb23ea753676efdd..22c56fc8ada9c8cef38186da523d7a503f0c3837 100644
--- a/test/cctest/compiler/test-representation-change.cc
+++ b/test/cctest/compiler/test-representation-change.cc
@@ -439,14 +439,13 @@
 
 
 TEST(SingleChanges) {
-  CheckChange(IrOpcode::kChangeTaggedToBit, MachineRepresentation::kTagged,
+  CheckChange(IrOpcode::kChangeBoolToBit, MachineRepresentation::kTagged,
               Type::None(), MachineRepresentation::kBit);
-  CheckChange(IrOpcode::kChangeBitToTagged, MachineRepresentation::kBit,
+  CheckChange(IrOpcode::kChangeBitToBool, MachineRepresentation::kBit,
               Type::None(), MachineRepresentation::kTagged);
 
-  CheckChange(IrOpcode::kChangeInt31ToTaggedSigned,
-              MachineRepresentation::kWord32, Type::Signed31(),
-              MachineRepresentation::kTagged);
+  CheckChange(IrOpcode::kChangeInt31ToTagged, MachineRepresentation::kWord32,
+              Type::Signed31(), MachineRepresentation::kTagged);
   CheckChange(IrOpcode::kChangeInt32ToTagged, MachineRepresentation::kWord32,
               Type::Signed32(), MachineRepresentation::kTagged);
   CheckChange(IrOpcode::kChangeUint32ToTagged, MachineRepresentation::kWord32,
@@ -454,7 +453,7 @@
   CheckChange(IrOpcode::kChangeFloat64ToTagged, MachineRepresentation::kFloat64,
               Type::Number(), MachineRepresentation::kTagged);
   CheckTwoChanges(IrOpcode::kChangeFloat64ToInt32,
-                  IrOpcode::kChangeInt31ToTaggedSigned,
+                  IrOpcode::kChangeInt31ToTagged,
                   MachineRepresentation::kFloat64, Type::Signed31(),
                   MachineRepresentation::kTagged);
   CheckTwoChanges(IrOpcode::kChangeFloat64ToInt32,