Fixes to support ARMv5 lego mindstorm.

runtime/vm/raw_object.h

 // 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.
 
 #ifndef VM_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/globals.h"
 #include "vm/token.h"
@@ skipping 954 matching lines @@
     bool is_compressed() const {
       return (token_pos_ & 0x1) == 1;
     }
 
     uword pc_;
     int32_t deopt_id_and_kind_;  // Bits 31..8 -> deopt_id, bits 7..0 kind.
     int32_t token_pos_;  // Bits 31..1 -> token_pos, bit 1 -> compressed flag;
     int16_t try_index_;
   };
 
+  // This structure is only used to compute what the size of PcDescriptorRec
+  // should be when the try_index_ field is omitted.
+  struct CompressedPcDescriptorRec {
+    uword pc_;
+    int32_t deopt_id_and_kind_;
+    int32_t token_pos_;
+  };
+
   static intptr_t RecordSize(bool has_try_index);
 
  private:
   RAW_HEAP_OBJECT_IMPLEMENTATION(PcDescriptors);
 
   static const intptr_t kFullRecSize;
   static const intptr_t kCompressedRecSize;
 
   intptr_t record_size_in_bytes_;
   intptr_t length_;  // Number of descriptors.
@@ skipping 992 matching lines @@
   COMPILE_ASSERT(kExternalTypedDataInt8ArrayCid ==
                  kTypedDataInt8ArrayViewCid + 15);
   COMPILE_ASSERT(kByteBufferCid == kExternalTypedDataInt8ArrayCid + 14);
   COMPILE_ASSERT(kNullCid == kByteBufferCid + 1);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_