[turbofan] Fix truncation/representation sloppiness wrt. bool/bit.

test/unittests/compiler/change-lowering-unittest.cc

Index: test/unittests/compiler/change-lowering-unittest.cc
diff --git a/test/unittests/compiler/change-lowering-unittest.cc b/test/unittests/compiler/change-lowering-unittest.cc
index 82e262f401a80a135386d6e9ecdc1200468734d0..060b1c1842fb663a1a598923297cc5c962e29599 100644
--- a/test/unittests/compiler/change-lowering-unittest.cc
+++ b/test/unittests/compiler/change-lowering-unittest.cc
@@ -132,29 +132,8 @@ TARGET_TEST_P(ChangeLoweringCommonTest, ChangeBoolToBit) {
   Node* node = graph()->NewNode(simplified()->ChangeBoolToBit(), val);
   Reduction reduction = Reduce(node);
   ASSERT_TRUE(reduction.Changed());
-  EXPECT_THAT(reduction.replacement(), IsWordEqual(val, IsTrueConstant()));
-}
 
-
-TARGET_TEST_P(ChangeLoweringCommonTest, ChangeWord32ToBit) {
-  Node* val = Parameter(0);
-  Node* node = graph()->NewNode(simplified()->ChangeWord32ToBit(), val);
-  Reduction reduction = Reduce(node);
-  ASSERT_TRUE(reduction.Changed());
-  EXPECT_THAT(reduction.replacement(),
-              IsWord32Equal(IsWord32Equal(val, IsInt32Constant(0)),
-                            IsInt32Constant(0)));
-}
-
-
-TARGET_TEST_P(ChangeLoweringCommonTest, ChangeWord64ToBit) {
-  Node* val = Parameter(0);
-  Node* node = graph()->NewNode(simplified()->ChangeWord64ToBit(), val);
-  Reduction reduction = Reduce(node);
-  ASSERT_TRUE(reduction.Changed());
-  EXPECT_THAT(reduction.replacement(),
-              IsWord32Equal(IsWord64Equal(val, IsInt64Constant(0)),
-                            IsInt32Constant(0)));
+  EXPECT_THAT(reduction.replacement(), IsWordEqual(val, IsTrueConstant()));
 }