Deletion barrier: Distinguish+verify field initialization in ia32 generated code.

runtime/vm/disassembler_ia32.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/disassembler.h"
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_IA32.
 #if defined(TARGET_ARCH_IA32)
 #include "platform/utils.h"
 #include "vm/allocation.h"
@@ skipping 1314 matching lines @@
         break;
 
       case 0xF6:
       { int mod, regop, rm;
         GetModRm(*(data+1), &mod, &regop, &rm);
         if ((mod == 3) && (regop == eax)) {
           Print("test_b ");
           PrintCPURegister(rm);
           Print(",");
           PrintHex(*(data+2));
+          data += 3;
         } else {
-          UNIMPLEMENTED();
+          data++;
+          Print("test_b ");
+          data += PrintRightOperand(data);
+          int32_t imm = *data;
+          Print(",");
+          PrintHex(imm);
+          data++;
         }
-        data += 3;
       }
         break;
 
       case 0x81:  // fall through
       case 0x83:  // 0x81 with sign extension bit set
         data += PrintImmediateOp(data);
         break;
 
       case 0x0F:
       { uint8_t f0byte = *(data+1);
@@ skipping 492 matching lines @@
   }
   hex_buffer[hex_index] = '\0';
   if (out_instr_len) {
     *out_instr_len = instruction_length;
   }
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32