Revert of Version 5.0.71.10 (cherry-pick)

src/arm64/code-stubs-arm64.cc

 // Copyright 2013 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.
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/ic/handler-compiler.h"
@@ skipping 610 matching lines @@
                                                     x12, x13);
   }
 
   // Never fall through to here.
   if (FLAG_debug_code) {
     __ Unreachable();
   }
 
   __ Bind(&slow);
 
+  __ Push(lhs, rhs);
+  // Figure out which native to call and setup the arguments.
   if (cond == eq) {
-    {
-      FrameScope scope(masm, StackFrame::INTERNAL);
-      __ Push(lhs, rhs);
-      __ CallRuntime(strict() ? Runtime::kStrictEqual : Runtime::kEqual);
-    }
-    // Turn true into 0 and false into some non-zero value.
-    STATIC_ASSERT(EQUAL == 0);
-    __ LoadRoot(x1, Heap::kTrueValueRootIndex);
-    __ Sub(x0, x0, x1);
-    __ Ret();
+    __ TailCallRuntime(strict() ? Runtime::kStrictEquals : Runtime::kEquals);
   } else {
-    __ Push(lhs, rhs);
     int ncr;  // NaN compare result
     if ((cond == lt) || (cond == le)) {
       ncr = GREATER;
     } else {
       DCHECK((cond == gt) || (cond == ge));  // remaining cases
       ncr = LESS;
     }
     __ Mov(x10, Smi::FromInt(ncr));
     __ Push(x10);
 
@@ skipping 5349 matching lines @@
                            return_value_operand, NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64