PPC: [stubs] Introduce a dedicated FastNewObjectStub.

src/ppc/macro-assembler-ppc.h

Index: src/ppc/macro-assembler-ppc.h
diff --git a/src/ppc/macro-assembler-ppc.h b/src/ppc/macro-assembler-ppc.h
index b4498f26df0fbe43f7b651abda1a31081d6c7228..d9dbd568273f6abca6f7c76e48d5897af5f076eb 100644
--- a/src/ppc/macro-assembler-ppc.h
+++ b/src/ppc/macro-assembler-ppc.h
@@ -1352,6 +1352,9 @@ class MacroAssembler : public Assembler {
   // enabled via --debug-code.
   void AssertBoundFunction(Register object);
 
+  // Abort execution if argument is not a JSReceiver, enabled via --debug-code.
+  void AssertReceiver(Register object);
+
   // Abort execution if argument is not undefined or an AllocationSite, enabled
   // via --debug-code.
   void AssertUndefinedOrAllocationSite(Register object, Register scratch);