Revert "VM: New calling convention for generated code."

runtime/vm/deopt_instructions.cc

Index: runtime/vm/deopt_instructions.cc
diff --git a/runtime/vm/deopt_instructions.cc b/runtime/vm/deopt_instructions.cc
index 79f08d8f01e1a354a6edb0827ed74d3bc0231ce5..d6e2568a9856fe51b78a38b57cc1319986d4f4ac 100644
--- a/runtime/vm/deopt_instructions.cc
+++ b/runtime/vm/deopt_instructions.cc
@@ -26,8 +26,7 @@ DeoptContext::DeoptContext(const StackFrame* frame,
                            const Code& code,
                            DestFrameOptions dest_options,
                            fpu_register_t* fpu_registers,
-                           intptr_t* cpu_registers,
-                           bool is_lazy_deopt)
+                           intptr_t* cpu_registers)
     : code_(code.raw()),
       object_pool_(code.GetObjectPool()),
       deopt_info_(TypedData::null()),
@@ -46,8 +45,7 @@ DeoptContext::DeoptContext(const StackFrame* frame,
       timeline_event_(NULL),
       deferred_slots_(NULL),
       deferred_objects_count_(0),
-      deferred_objects_(NULL),
-      is_lazy_deopt_(is_lazy_deopt) {
+      deferred_objects_(NULL) {
   const TypedData& deopt_info = TypedData::Handle(
       code.GetDeoptInfoAtPc(frame->pc(), &deopt_reason_, &deopt_flags_));
   ASSERT(!deopt_info.IsNull());
@@ -653,16 +651,7 @@ class DeoptPcMarkerInstr : public DeoptInstr {
   }
 
   void Execute(DeoptContext* deopt_context, intptr_t* dest_addr) {
-    Function& function = Function::Handle(deopt_context->zone());
-    function ^= deopt_context->ObjectAt(object_table_index_);
-    if (function.IsNull()) {
-      *reinterpret_cast<RawObject**>(dest_addr) = deopt_context->is_lazy_deopt()
-          ? StubCode::DeoptimizeLazy_entry()->code()
-          : StubCode::Deoptimize_entry()->code();
-      return;
-    }
-
-    *dest_addr = reinterpret_cast<intptr_t>(Object::null());
+    *dest_addr = Smi::RawValue(0);
     deopt_context->DeferPcMarkerMaterialization(
         object_table_index_, dest_addr);
   }