[turbofan] Speculative optimize number operations with no feedback.

test/cctest/test-serialize.cc

Index: test/cctest/test-serialize.cc
diff --git a/test/cctest/test-serialize.cc b/test/cctest/test-serialize.cc
index 2df0f0e799f4f63bbb40469116164f119901addf..4523bb2649745d773754793be2db6a19e1a1ec09 100644
--- a/test/cctest/test-serialize.cc
+++ b/test/cctest/test-serialize.cc
@@ -1664,6 +1664,9 @@ TEST(CodeSerializerWithHarmonyScoping) {
 }
 
 TEST(CodeSerializerInternalReference) {
+// TODO(yangguo): This test should really use the CodeStubAssembler to
+// specifically generate a controlled table switch, instead of relying
+// on TurboFan to generate a certain graph.
 #if V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_ARM64
   return;
 #endif
@@ -1675,6 +1678,7 @@ TEST(CodeSerializerInternalReference) {
   }
   // Disable experimental natives that are loaded after deserialization.
   FLAG_function_context_specialization = false;
+  FLAG_turbo_type_feedback = false;
   FLAG_always_opt = true;
   const char* flag = "--turbo-filter=foo";
   FlagList::SetFlagsFromString(flag, StrLength(flag));