[stubs] Fix some CodeStubAssembler macros and adds a bitcast in the ToObjectStub.

test/unittests/interpreter/interpreter-assembler-unittest.cc

Index: test/unittests/interpreter/interpreter-assembler-unittest.cc
diff --git a/test/unittests/interpreter/interpreter-assembler-unittest.cc b/test/unittests/interpreter/interpreter-assembler-unittest.cc
index 53afb35a12a2305c77d562d5bfe7060129004b01..d8526606b0d7ce4842b964746e94b8efd8baf840 100644
--- a/test/unittests/interpreter/interpreter-assembler-unittest.cc
+++ b/test/unittests/interpreter/interpreter-assembler-unittest.cc
@@ -538,9 +538,9 @@ TARGET_TEST_F(InterpreterAssemblerTest, SmiTag) {
   TRACED_FOREACH(interpreter::Bytecode, bytecode, kBytecodes) {
     InterpreterAssemblerForTest m(this, bytecode);
     Node* value = m.Int32Constant(44);
-    EXPECT_THAT(m.SmiTag(value),
-                IsIntPtrConstant(static_cast<intptr_t>(44)
-                                 << (kSmiShiftSize + kSmiTagSize)));
+    EXPECT_THAT(m.SmiTag(value), IsBitcastWordToTaggedSigned(IsIntPtrConstant(
+                                     static_cast<intptr_t>(44)
+                                     << (kSmiShiftSize + kSmiTagSize))));
     EXPECT_THAT(m.SmiUntag(value),
                 IsWordSar(IsBitcastTaggedToWord(value),
                           IsIntPtrConstant(kSmiShiftSize + kSmiTagSize)));