[runtime] Unify and fix the strict equality comparison.

src/x87/code-stubs-x87.cc

Index: src/x87/code-stubs-x87.cc
diff --git a/src/x87/code-stubs-x87.cc b/src/x87/code-stubs-x87.cc
index c7a6d23dc74abd3b4a05e57aecf82bd3cd52871c..cf2f0b3e0d416aeacd9820c83193ecaaa0d91d38 100644
--- a/src/x87/code-stubs-x87.cc
+++ b/src/x87/code-stubs-x87.cc
@@ -1605,21 +1605,26 @@ void CompareICStub::GenerateGeneric(MacroAssembler* masm) {
   __ push(eax);
 
   // Figure out which native to call and setup the arguments.
-  Builtins::JavaScript builtin;
-  if (cc == equal) {
-    builtin = strict() ? Builtins::STRICT_EQUALS : Builtins::EQUALS;
+  if (cc == equal && strict()) {
+    __ push(ecx);
+    __ TailCallRuntime(Runtime::kStrictEquals, 2, 1);
   } else {
-    builtin =
-        is_strong(strength()) ? Builtins::COMPARE_STRONG : Builtins::COMPARE;
-    __ push(Immediate(Smi::FromInt(NegativeComparisonResult(cc))));
-  }
+    Builtins::JavaScript builtin;
+    if (cc == equal) {
+      builtin = Builtins::EQUALS;
+    } else {
+      builtin =
+          is_strong(strength()) ? Builtins::COMPARE_STRONG : Builtins::COMPARE;
+      __ push(Immediate(Smi::FromInt(NegativeComparisonResult(cc))));
+    }
 
-  // Restore return address on the stack.
-  __ push(ecx);
+    // Restore return address on the stack.
+    __ push(ecx);
 
-  // Call the native; it returns -1 (less), 0 (equal), or 1 (greater)
-  // tagged as a small integer.
-  __ InvokeBuiltin(builtin, JUMP_FUNCTION);
+    // Call the native; it returns -1 (less), 0 (equal), or 1 (greater)
+    // tagged as a small integer.
+    __ InvokeBuiltin(builtin, JUMP_FUNCTION);
+  }
 
   __ bind(&miss);
   GenerateMiss(masm);