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 3f4d5ea099383d89477d9b375355a8fc412a1859..bd3ca5b57dba1ef06b31a132ad7aec3799dee3fa 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);
@@ -312,6 +314,12 @@ class ObjectPoolWrapper : public ValueObject {
   DirectChainedHashMap<ObjIndexPair> object_pool_index_table_;
 };
 
+
+enum RestorePP {
+  kRestoreCallerPP,
+  kKeepCalleePP
+};
+
 }  // namespace dart