Revert of Version 5.0.71.10 (cherry-pick)

src/ppc/code-stubs-ppc.cc

Index: src/ppc/code-stubs-ppc.cc
diff --git a/src/ppc/code-stubs-ppc.cc b/src/ppc/code-stubs-ppc.cc
index 469ec9b4f544a9a8baa380464ab8e190c97b03da..3734f1f6e60a64b74b3e65560d3e3dbd636a23c0 100644
--- a/src/ppc/code-stubs-ppc.cc
+++ b/src/ppc/code-stubs-ppc.cc
@@ -698,19 +698,11 @@
 
   __ bind(&slow);
 
+  __ Push(lhs, rhs);
+  // Figure out which native to call and setup the arguments.
   if (cc == eq) {
-    {
-      FrameAndConstantPoolScope 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(r4, Heap::kTrueValueRootIndex);
-    __ sub(r3, r3, r4);
-    __ Ret();
+    __ TailCallRuntime(strict() ? Runtime::kStrictEquals : Runtime::kEquals);
   } else {
-    __ Push(lhs, rhs);
     int ncr;  // NaN compare result
     if (cc == lt || cc == le) {
       ncr = GREATER;