PseudoSourceValue.cpp revision 660c02c239bbb0c1c041ad610d6015c261e9675d 
1//===-- llvm/CodeGen/PseudoSourceValue.cpp ----------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the PseudoSourceValue class.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/CodeGen/PseudoSourceValue.h"
15#include "llvm/DerivedTypes.h"
16#include "llvm/Support/Compiler.h"
17#include "llvm/Support/ManagedStatic.h"
18#include <map>
19
20namespace llvm {
21  static ManagedStatic<PseudoSourceValue[4]> PSVs;
22
23  const PseudoSourceValue *PseudoSourceValue::getStack()
24  { return &(*PSVs)[0]; }
25  const PseudoSourceValue *PseudoSourceValue::getGOT()
26  { return &(*PSVs)[1]; }
27  const PseudoSourceValue *PseudoSourceValue::getJumpTable()
28  { return &(*PSVs)[2]; }
29  const PseudoSourceValue *PseudoSourceValue::getConstantPool()
30  { return &(*PSVs)[3]; }
31
32  static const char *const PSVNames[] = {
33    "Stack",
34    "GOT",
35    "JumpTable",
36    "ConstantPool"
37  };
38
39  PseudoSourceValue::PseudoSourceValue() :
40    Value(PointerType::getUnqual(Type::Int8Ty), PseudoSourceValueVal) {}
41
42  void PseudoSourceValue::print(std::ostream &OS) const {
43    OS << PSVNames[this - *PSVs];
44  }
45
46  /// FixedStackPseudoSourceValue - A specialized PseudoSourceValue
47  /// for holding FixedStack values, which must include a frame
48  /// index.
49  class VISIBILITY_HIDDEN FixedStackPseudoSourceValue
50    : public PseudoSourceValue {
51    const int FI;
52  public:
53    explicit FixedStackPseudoSourceValue(int fi) : FI(fi) {}
54    virtual void print(std::ostream &OS) const {
55      OS << "FixedStack" << FI;
56    }
57  };
58
59  static ManagedStatic<std::map<int, const PseudoSourceValue *> > FSValues;
60
61  const PseudoSourceValue *PseudoSourceValue::getFixedStack(int FI) {
62    const PseudoSourceValue *&V = (*FSValues)[FI];
63    if (!V)
64      V = new FixedStackPseudoSourceValue(FI);
65    return V;
66  }
67}
68