A64: Todos - peek/poke and branch generator

src/a64/lithium-codegen-a64.h

Index: src/a64/lithium-codegen-a64.h
diff --git a/src/a64/lithium-codegen-a64.h b/src/a64/lithium-codegen-a64.h
index 5179cb4052090a98520736e3d731222a17d34948..f0a26abdfe74253ef50e9b09c04b5146dc643aad 100644
--- a/src/a64/lithium-codegen-a64.h
+++ b/src/a64/lithium-codegen-a64.h
@@ -212,6 +212,10 @@ class LCodeGen BASE_EMBEDDED {
                                  const FPRegister& value,
                                  const FPRegister& scratch);
 
+  template<class InstrType>
+  void EmitBranchIfHeapNumber(InstrType instr,
+                              const Register& value);
+
   // Emits optimized code to deep-copy the contents of statically known object
   // graphs (e.g. object literal boilerplate). Expects a pointer to the
   // allocated destination object in the result register, and a pointer to the