PPC: [compiler] Introduce initial StrictEqualStub.

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..2cfca2f61063c8c5a3d998e48644ed6be6befdbb 100644
--- a/src/ppc/code-stubs-ppc.cc
+++ b/src/ppc/code-stubs-ppc.cc
@@ -3295,10 +3295,17 @@ void CompareICStub::GenerateStrings(MacroAssembler* masm) {
 
   // Handle more complex cases in runtime.
   __ bind(&runtime);
-  __ Push(left, right);
   if (equality) {
-    __ TailCallRuntime(Runtime::kStringEquals);
+    {
+      FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
+      __ Push(left, right);
+      __ CallRuntime(Runtime::kStringEqual);
+    }
+    __ LoadRoot(r4, Heap::kTrueValueRootIndex);
+    __ sub(r3, r3, r4);
+    __ Ret();
   } else {
+    __ Push(left, right);
     __ TailCallRuntime(Runtime::kStringCompare);
   }