VM: New calling convention for generated code.

runtime/vm/assembler.h

Index: runtime/vm/assembler.h
diff --git a/runtime/vm/assembler.h b/runtime/vm/assembler.h
index f2ad6fed6491405e95ac124d3c1208104c83955d..980f72ceee89b4f1122dc883d35c422d57c3183a 100644
--- a/runtime/vm/assembler.h
+++ b/runtime/vm/assembler.h
@@ -287,12 +287,14 @@ enum Patchability {
 
 class ObjectPoolWrapper : public ValueObject {
  public:
-  intptr_t AddObject(const Object& obj);
+  intptr_t AddObject(const Object& obj,
+                     Patchability patchable = kNotPatchable);
   intptr_t AddImmediate(uword imm);
   intptr_t AddExternalLabel(const ExternalLabel* label,
                             Patchability patchable);
 
-  intptr_t FindObject(const Object& obj);
+  intptr_t FindObject(const Object& obj,
+                      Patchability patchable = kNotPatchable);
   intptr_t FindImmediate(uword imm);
   intptr_t FindExternalLabel(const ExternalLabel* label,
                              Patchability patchable);
@@ -310,6 +312,12 @@ class ObjectPoolWrapper : public ValueObject {
   DirectChainedHashMap<ObjIndexPair> object_pool_index_table_;
 };
 
+
+enum RestorePP {
+  kRestoreCallerPP,
+  kKeepCalleePP
+};
+
 }  // namespace dart