[compiler] Introduce initial StrictEqualStub.

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index ce4e94451448fe2cd831edd0ce6b1b83d7a44918..3a61ef02d223770d8d7a40dbc6571e6d8d897e86 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -101,6 +101,7 @@ namespace internal {
   V(LoadIC)                                 \
   /* TurboFanCodeStubs */                   \
   V(StringLength)                           \
+  V(StrictEqual)                            \
   V(ToBoolean)                              \
   /* IC Handler stubs */                    \
   V(ArrayBufferViewLoadField)               \
@@ -631,6 +632,16 @@ class StringLengthStub : public TurboFanCodeStub {
   DEFINE_CODE_STUB(StringLength, TurboFanCodeStub);
 };
 
+class StrictEqualStub final : public TurboFanCodeStub {
+ public:
+  explicit StrictEqualStub(Isolate* isolate) : TurboFanCodeStub(isolate) {}
+
+  void GenerateAssembly(compiler::CodeStubAssembler* assembler) const final;
+
+  DEFINE_CALL_INTERFACE_DESCRIPTOR(Compare);
+  DEFINE_CODE_STUB(StrictEqual, TurboFanCodeStub);
+};
+
 class ToBooleanStub final : public TurboFanCodeStub {
  public:
   explicit ToBooleanStub(Isolate* isolate) : TurboFanCodeStub(isolate) {}