[runtime] Unify and fix the strict equality comparison.

src/arm/code-stubs-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 663 matching lines @@
   } else {
     StringHelper::GenerateCompareFlatOneByteStrings(masm, lhs, rhs, r2, r3, r4,
                                                     r5);
   }
   // Never falls through to here.
 
   __ bind(&slow);
 
   __ Push(lhs, rhs);
   // Figure out which native to call and setup the arguments.
-  Builtins::JavaScript native;
-  if (cc == eq) {
-    native = strict() ? Builtins::STRICT_EQUALS : Builtins::EQUALS;
+  if (cc == eq && strict()) {
+    __ TailCallRuntime(Runtime::kStrictEquals, 2, 1);
   } else {
-    native =
-        is_strong(strength()) ? Builtins::COMPARE_STRONG : Builtins::COMPARE;
-    int ncr;  // NaN compare result
-    if (cc == lt || cc == le) {
-      ncr = GREATER;
+    Builtins::JavaScript native;
+    if (cc == eq) {
+      native = Builtins::EQUALS;
     } else {
-      DCHECK(cc == gt || cc == ge);  // remaining cases
-      ncr = LESS;
+      native =
+          is_strong(strength()) ? Builtins::COMPARE_STRONG : Builtins::COMPARE;
+      int ncr;  // NaN compare result
+      if (cc == lt || cc == le) {
+        ncr = GREATER;
+      } else {
+        DCHECK(cc == gt || cc == ge);  // remaining cases
+        ncr = LESS;
+      }
+      __ mov(r0, Operand(Smi::FromInt(ncr)));
+      __ push(r0);
     }
-    __ mov(r0, Operand(Smi::FromInt(ncr)));
-    __ push(r0);
+
+    // Call the native; it returns -1 (less), 0 (equal), or 1 (greater)
+    // tagged as a small integer.
+    __ InvokeBuiltin(native, JUMP_FUNCTION);
   }
 
-  // Call the native; it returns -1 (less), 0 (equal), or 1 (greater)
-  // tagged as a small integer.
-  __ InvokeBuiltin(native, JUMP_FUNCTION);
-
   __ bind(&miss);
   GenerateMiss(masm);
 }
 
 
 void StoreBufferOverflowStub::Generate(MacroAssembler* masm) {
   // We don't allow a GC during a store buffer overflow so there is no need to
   // store the registers in any particular way, but we do have to store and
   // restore them.
   __ stm(db_w, sp, kCallerSaved | lr.bit());
@@ skipping 4811 matching lines @@
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM