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

runtime/vm/flow_graph_compiler_ia32.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_IA32.
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/ast_printer.h"
@@ skipping 89 matching lines @@
   // The real frame starts here.
   builder->MarkFrameStart();
 
   Zone* zone = compiler->zone();
 
   // Callee's PC marker is not used anymore. Pass Code::null() to set to 0.
   builder->AddPcMarker(Function::Handle(zone), slot_ix++);
 
   // Current FP and PC.
   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
   // will be able to find them during materialization.
   slot_ix = builder->EmitMaterializationArguments(slot_ix);
 
   // For the innermost environment, set outgoing arguments and the locals.
   for (intptr_t i = current->Length() - 1;
        i >= current->fixed_parameter_count();
        i--) {
     builder->AddCopy(current->ValueAt(i), current->LocationAt(i), slot_ix++);
   }
 
   // Current PC marker and caller FP.
-  builder->AddPcMarker(Function::Handle(
-      zone, current->code().function()), slot_ix++);
+  builder->AddPcMarker(current->function(), slot_ix++);
   builder->AddCallerFp(slot_ix++);
 
   Environment* previous = current;
   current = current->outer();
   while (current != NULL) {
     // 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++);
 
     // The values of outgoing arguments can be changed from the inlined call so
     // we must read them from the previous environment.
     for (intptr_t i = previous->fixed_parameter_count() - 1; i >= 0; i--) {
       builder->AddCopy(previous->ValueAt(i),
                        previous->LocationAt(i),
                        slot_ix++);
     }
 
     // Set the locals, note that outgoing arguments are not in the environment.
     for (intptr_t i = current->Length() - 1;
          i >= current->fixed_parameter_count();
          i--) {
       builder->AddCopy(current->ValueAt(i),
                        current->LocationAt(i),
                        slot_ix++);
     }
 
     // PC marker and caller FP.
-    builder->AddPcMarker(Function::Handle(zone, current->code().function()),
-                         slot_ix++);
+    builder->AddPcMarker(current->function(), slot_ix++);
     builder->AddCallerFp(slot_ix++);
 
     // Iterate on the outer environment.
     previous = current;
     current = current->outer();
   }
   // The previous pointer is now the outermost environment.
   ASSERT(previous != NULL);
 
   // For the outermost environment, set caller PC.
@@ skipping 1681 matching lines @@
   __ movups(reg, Address(ESP, 0));
   __ addl(ESP, Immediate(kFpuRegisterSize));
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32