More PcDescriptor cleanups.

runtime/vm/code_descriptors.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/code_descriptors.h"
 
 namespace dart {
 
 void DescriptorList::AddDescriptor(RawPcDescriptors::Kind kind,
                                    intptr_t pc_offset,
                                    intptr_t deopt_id,
                                    intptr_t token_index,
                                    intptr_t try_index) {
   struct PcDesc data;
   data.pc_offset = pc_offset;
   data.kind = kind;
   data.deopt_id = deopt_id;
   data.SetTokenPos(token_index);
   data.try_index = try_index;
   list_.Add(data);
+  if (try_index >= 0) {
+    has_try_index_ = true;
+  }
 }
 
 
 RawPcDescriptors* DescriptorList::FinalizePcDescriptors(uword entry_point) {
   intptr_t num_descriptors = Length();
   const PcDescriptors& descriptors =
-      PcDescriptors::Handle(PcDescriptors::New(num_descriptors));
+      PcDescriptors::Handle(PcDescriptors::New(num_descriptors,
+                                               has_try_index_));
   for (intptr_t i = 0; i < num_descriptors; i++) {
     descriptors.AddDescriptor(i,
                               (entry_point + PcOffset(i)),
                               Kind(i),
                               DeoptId(i),
                               TokenPos(i),
                               TryIndex(i));
   }
   return descriptors.raw();
 }
@@ skipping 38 matching lines @@
 }
 
 
 RawStackmap* StackmapTableBuilder::MapAt(intptr_t index) const {
   Stackmap& map = Stackmap::Handle();
   map ^= list_.At(index);
   return map.raw();
 }
 
 }  // namespace dart