Drop the udis86 wrapper from llvm::sys

This optional dependency on the udis86 library was added some time back to aid
JIT development, but doesn't make much sense to link into LLVM binaries these
days.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213300 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Support/CMakeLists.txt

@@ -73,7 +73,6 @@ add_llvm_library(LLVMSupport
 
 # System
   Atomic.cpp
-  Disassembler.cpp
   DynamicLibrary.cpp
   Errno.cpp
   Host.cpp

lib/Support/Disassembler.cpp

@@ -1,74 +0,0 @@
-//===- lib/Support/Disassembler.cpp -----------------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements the necessary glue to call external disassembler
-// libraries.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Support/Disassembler.h"
-#include "llvm/Config/config.h"
-#include <cassert>
-#include <iomanip>
-#include <sstream>
-#include <string>
-
-#if USE_UDIS86
-#include <udis86.h>
-#endif
-
-using namespace llvm;
-
-bool llvm::sys::hasDisassembler()
-{
-#if defined (__i386__) || defined (__amd64__) || defined (__x86_64__)
-  // We have option to enable udis86 library.
-# if USE_UDIS86
-  return true;
-#else
-  return false;
-#endif
-#else
-  return false;
-#endif
-}
-
-std::string llvm::sys::disassembleBuffer(uint8_t* start, size_t length,
-                                         uint64_t pc) {
-#if (defined (__i386__) || defined (__amd64__) || defined (__x86_64__)) \
-  && USE_UDIS86
-  std::stringstream res;
-
-  unsigned bits;
-# if defined(__i386__)
-  bits = 32;
-# else
-  bits = 64;
-# endif
-
-  ud_t ud_obj;
-
-  ud_init(&ud_obj);
-  ud_set_input_buffer(&ud_obj, start, length);
-  ud_set_mode(&ud_obj, bits);
-  ud_set_pc(&ud_obj, pc);
-  ud_set_syntax(&ud_obj, UD_SYN_ATT);
-
-  res << std::setbase(16)
-      << std::setw(bits/4);
-
-  while (ud_disassemble(&ud_obj)) {
-    res << ud_insn_off(&ud_obj) << ":\t" << ud_insn_asm(&ud_obj) << "\n";
-  }
-
-  return res.str();
-#else
-  return "No disassembler available. See configure help for options.\n";
-#endif
-}