[Interpreter] Transform StrictEquality with null/undefined to special bytecodes.

test/cctest/interpreter/test-bytecode-generator.cc

Index: test/cctest/interpreter/test-bytecode-generator.cc
diff --git a/test/cctest/interpreter/test-bytecode-generator.cc b/test/cctest/interpreter/test-bytecode-generator.cc
index c5e6b3a21714a95f3d52cef0b2a672f872ae32bf..1fed4fb0d7db55f0375703aa22acceeafaa75203 100644
--- a/test/cctest/interpreter/test-bytecode-generator.cc
+++ b/test/cctest/interpreter/test-bytecode-generator.cc
@@ -1750,17 +1750,40 @@ TEST(GenerateTestUndetectable) {
       "var b = 10;\n"
       "if (obj_a == null) { b = 20;}\n"
       "return b;\n",
+
       "var obj_a = {val:1};\n"
       "var b = 10;\n"
       "if (obj_a == undefined) { b = 20;}\n"
       "return b;\n",
+
       "var obj_a = {val:1};\n"
       "var b = 10;\n"
       "if (obj_a != null) { b = 20;}\n"
       "return b;\n",
+
       "var obj_a = {val:1};\n"
       "var b = 10;\n"
       "if (obj_a != undefined) { b = 20;}\n"
+      "return b;\n",
+
+      "var obj_a = {val:1};\n"
+      "var b = 10;\n"
+      "if (obj_a === null) { b = 20;}\n"
+      "return b;\n",
+
+      "var obj_a = {val:1};\n"
+      "var b = 10;\n"
+      "if (obj_a === undefined) { b = 20;}\n"
+      "return b;\n",
+
+      "var obj_a = {val:1};\n"
+      "var b = 10;\n"
+      "if (obj_a !== null) { b = 20;}\n"
+      "return b;\n",
+
+      "var obj_a = {val:1};\n"
+      "var b = 10;\n"
+      "if (obj_a !== undefined) { b = 20;}\n"
       "return b;\n"};
 
   CHECK(CompareTexts(BuildActual(printer, snippets),