Pushes 0 for PC marker in runtime call stubs on ARM and MIPS.

runtime/vm/stack_frame.cc

 // Copyright (c) 2012, 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/stack_frame.h"
 
 #include "vm/assembler.h"
 #include "vm/deopt_instructions.h"
 #include "vm/isolate.h"
 #include "vm/object.h"
@@ skipping 79 matching lines @@
       // map.  The outgoing arguments are assumed to be tagged; the number
       // of outgoing arguments is not explicitly tracked.
       //
       // TODO(kmillikin): This does not handle slow path calls with
       // arguments, where the arguments are pushed after the live registers.
       // Enable such calls.
       intptr_t length = map.Length();
       // Spill slots are at the 'bottom' of the frame.
       intptr_t spill_slot_count = length - map.RegisterBitCount();
       for (intptr_t bit = 0; bit < spill_slot_count; ++bit) {
-        if (map.IsObject(bit)) visitor->VisitPointer(last);
+        if (map.IsObject(bit)) {
+          visitor->VisitPointer(last);
+        }
         --last;
       }
 
       // The live registers at the 'top' of the frame comprise the rest of the
       // stack map.
       for (intptr_t bit = length - 1; bit >= spill_slot_count; --bit) {
-        if (map.IsObject(bit)) visitor->VisitPointer(first);
+        if (map.IsObject(bit)) {
+          visitor->VisitPointer(first);
+        }
         ++first;
       }
 
       // The last slot can be one slot (but not more) past the last slot
       // in the case that all slots were covered by the stack map.
       ASSERT((last + 1) >= first);
       visitor->VisitPointers(first, last);
 
       // Now visit other slots which might be part of the calling convention.
       first = reinterpret_cast<RawObject**>(
@@ skipping 306 matching lines @@
     if (deopt_instr->kind() == DeoptInstr::kCallerFp) {
       return index;
     }
   }
   UNREACHABLE();
   return 0;
 }
 
 
 }  // namespace dart