Fix performance regressions due to lazy initialization.

src/x64/disasm-x64.cc

 // Copyright 2011 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 252 matching lines @@
 void InstructionTable::AddJumpConditionalShort() {
   for (byte b = 0x70; b <= 0x7F; b++) {
     InstructionDesc* id = &instructions_[b];
     ASSERT_EQ(NO_INSTR, id->type);  // Information not already entered
     id->mnem = NULL;  // Computed depending on condition code.
     id->type = JUMP_CONDITIONAL_SHORT_INSTR;
   }
 }
 
 
-static v8::internal::LazyInstance<InstructionTable>::type instruction_table =
-    LAZY_INSTANCE_INITIALIZER;
+static v8::internal::LazyInstance<
+    InstructionTable,
+    v8::internal::DefaultConstructTrait<InstructionTable>,
+    v8::internal::SingleThreadInitOnceTrait>::type instruction_table =
+        LAZY_INSTANCE_INITIALIZER;
 
 
 static InstructionDesc cmov_instructions[16] = {
   {"cmovo", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false},
   {"cmovno", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false},
   {"cmovc", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false},
   {"cmovnc", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false},
   {"cmovz", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false},
   {"cmovnz", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false},
   {"cmovna", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false},
@@ skipping 1558 matching lines @@
     for (int i = 6 - static_cast<int>(pc - prev_pc); i >= 0; i--) {
       fprintf(f, "  ");
     }
     fprintf(f, "  %s\n", buffer.start());
   }
 }
 
 }  // namespace disasm
 
 #endif  // V8_TARGET_ARCH_X64