X64: Fix compiler complaint

src/x64/disasm-x64.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1331 matching lines @@
         AppendToBuffer("push 0x%x", *reinterpret_cast<int8_t*>(data + 1));
         data += 2;
         break;
 
       case 0xA8:
         AppendToBuffer("test al,0x%x", *reinterpret_cast<uint8_t*>(data + 1));
         data += 2;
         break;
 
       case 0xA9: {
-        int64_t value;
+        int64_t value = 0;

[William Hesse, 2009/07/20 20:18:28]

The USE macro won't work.  Giving a default initialization.

         switch (operand_size()) {
           case WORD_SIZE:
             value = *reinterpret_cast<uint16_t*>(data + 1);
             data += 3;
             break;
           case DOUBLEWORD_SIZE:
             value = *reinterpret_cast<uint32_t*>(data + 1);
             data += 5;
             break;
           case QUADWORD_SIZE:
@@ skipping 161 matching lines @@
       fprintf(f, "%02x", *bp);
     }
     for (int i = 6 - (pc - prev_pc); i >= 0; i--) {
       fprintf(f, "  ");
     }
     fprintf(f, "  %s\n", buffer.start());
   }
 }
 
 }  // namespace disasm