VM: Don't depend on unoptimized code when inlining and creating deoptimization info.

runtime/vm/flow_graph_compiler_x64.cc

Index: runtime/vm/flow_graph_compiler_x64.cc
diff --git a/runtime/vm/flow_graph_compiler_x64.cc b/runtime/vm/flow_graph_compiler_x64.cc
index 33e01bb4c24f83fe2b09c4679f2d7173953e7cbb..40143d4ce34c5fbad73c092ca410fbb3dc2480c4 100644
--- a/runtime/vm/flow_graph_compiler_x64.cc
+++ b/runtime/vm/flow_graph_compiler_x64.cc
@@ -101,12 +101,10 @@ RawTypedData* CompilerDeoptInfo::CreateDeoptInfo(FlowGraphCompiler* compiler,
   Zone* zone = compiler->zone();
 
   // Current PP, FP, and PC.
-  builder->AddPp(Function::Handle(zone, current->code().function()), slot_ix++);
+  builder->AddPp(current->function(), slot_ix++);
   builder->AddPcMarker(Function::Handle(zone), slot_ix++);
   builder->AddCallerFp(slot_ix++);
-  builder->AddReturnAddress(Function::Handle(zone, current->code().function()),
-                            deopt_id(),
-                            slot_ix++);
+  builder->AddReturnAddress(current->function(), deopt_id(), slot_ix++);
 
   // Emit all values that are needed for materialization as a part of the
   // expression stack for the bottom-most frame. This guarantees that GC
@@ -124,16 +122,14 @@ RawTypedData* CompilerDeoptInfo::CreateDeoptInfo(FlowGraphCompiler* compiler,
   current = current->outer();
   while (current != NULL) {
     // PP, FP, and PC.
-    builder->AddPp(Function::Handle(zone, current->code().function()),
-                   slot_ix++);
-    builder->AddPcMarker(Function::Handle(zone, previous->code().function()),
-                         slot_ix++);
+    builder->AddPp(current->function(), slot_ix++);
+    builder->AddPcMarker(previous->function(), slot_ix++);
     builder->AddCallerFp(slot_ix++);
 
     // For any outer environment the deopt id is that of the call instruction
     // which is recorded in the outer environment.
     builder->AddReturnAddress(
-        Function::Handle(zone, current->code().function()),
+        current->function(),
         Isolate::ToDeoptAfter(current->deopt_id()),
         slot_ix++);
 
@@ -164,8 +160,7 @@ RawTypedData* CompilerDeoptInfo::CreateDeoptInfo(FlowGraphCompiler* compiler,
   // For the outermost environment, set caller PC, caller PP, and caller FP.
   builder->AddCallerPp(slot_ix++);
   // PC marker.
-  builder->AddPcMarker(Function::Handle(zone, previous->code().function()),
-                       slot_ix++);
+  builder->AddPcMarker(previous->function(), slot_ix++);
   builder->AddCallerFp(slot_ix++);
   builder->AddCallerPc(slot_ix++);