1  /*
 2   * Copyright (C) 2011-2019 Apple Inc. All rights reserved.
 3   *
 4   * Redistribution and use in source and binary forms, with or without
 5   * modification, are permitted provided that the following conditions
 6   * are met:
 7   * 1. Redistributions of source code must retain the above copyright
 8   *    notice, this list of conditions and the following disclaimer.
 9   * 2. Redistributions in binary form must reproduce the above copyright
10   *    notice, this list of conditions and the following disclaimer in the
11   *    documentation and/or other materials provided with the distribution.
12   *
13   * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21   * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
24   */
25  
26  #include "config.h"
27  #include "VirtualRegister.h"
28  
29  #include "RegisterID.h"
30  
31  namespace JSC {
32  
33  void VirtualRegister::dump(PrintStream& out) const
34  {
35      if (!isValid()) {
36          out.print("<invalid>");
37          return;
38      }
39      
40      if (isHeader()) {
41          if (m_virtualRegister == CallFrameSlot::codeBlock)
42              out.print("codeBlock");
43          else if (m_virtualRegister == CallFrameSlot::callee)
44              out.print("callee");
45          else if (m_virtualRegister == CallFrameSlot::argumentCountIncludingThis)
46              out.print("argumentCountIncludingThis");
47  #if CPU(ADDRESS64)
48          else if (!m_virtualRegister)
49              out.print("callerFrame");
50          else if (m_virtualRegister == 1)
51              out.print("returnPC");
52  #else
53          else if (!m_virtualRegister)
54              out.print("callerFrameAndReturnPC");
55  #endif
56          return;
57      }
58      
59      if (isConstant()) {
60          out.print("const", toConstantIndex());
61          return;
62      }
63      
64      if (isArgument()) {
65          if (!toArgument())
66              out.print("this");
67          else
68              out.print("arg", toArgument());
69          return;
70      }
71      
72      if (isLocal()) {
73          out.print("loc", toLocal());
74          return;
75      }
76      
77      RELEASE_ASSERT_NOT_REACHED();
78  }
79  
80  
81  VirtualRegister::VirtualRegister(RegisterID* reg)
82      : VirtualRegister(reg->m_virtualRegister.m_virtualRegister)
83  {
84  }
85  
86  VirtualRegister::VirtualRegister(RefPtr<RegisterID> reg)
87      : VirtualRegister(reg.get())
88  {
89  }
90  
91  } // namespace JSC