Revert of Version 5.0.71.10 (cherry-pick)

src/x64/code-stubs-x64.cc

Index: src/x64/code-stubs-x64.cc
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc
index 3dd2f45cbcc15c7fe858bbe870a582a98fa49c30..4b3d02841b28341dc8332c9d1568034a787f8773 100644
--- a/src/x64/code-stubs-x64.cc
+++ b/src/x64/code-stubs-x64.cc
@@ -1320,23 +1320,16 @@
   }
   __ bind(&runtime_call);
 
+  // Push arguments below the return address to prepare jump to builtin.
+  __ PopReturnAddressTo(rcx);
+  __ Push(rdx);
+  __ Push(rax);
+
+  // Figure out which native to call and setup the arguments.
   if (cc == equal) {
-    {
-      FrameScope scope(masm, StackFrame::INTERNAL);
-      __ Push(rdx);
-      __ Push(rax);
-      __ CallRuntime(strict() ? Runtime::kStrictEqual : Runtime::kEqual);
-    }
-    // Turn true into 0 and false into some non-zero value.
-    STATIC_ASSERT(EQUAL == 0);
-    __ LoadRoot(rdx, Heap::kTrueValueRootIndex);
-    __ subp(rax, rdx);
-    __ Ret();
+    __ PushReturnAddressFrom(rcx);
+    __ TailCallRuntime(strict() ? Runtime::kStrictEquals : Runtime::kEquals);
   } else {
-    // Push arguments below the return address to prepare jump to builtin.
-    __ PopReturnAddressTo(rcx);
-    __ Push(rdx);
-    __ Push(rax);
     __ Push(Smi::FromInt(NegativeComparisonResult(cc)));
     __ PushReturnAddressFrom(rcx);
     __ TailCallRuntime(Runtime::kCompare);