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Merge ^/head r311460 through r311545.
[FreeBSD/FreeBSD.git] / contrib / llvm / include / llvm / IR / GlobalIndirectSymbol.h
1 //===- llvm/GlobalIndirectSymbol.h - GlobalIndirectSymbol class -*- 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 contains the declaration of the GlobalIndirectSymbol class, which
11 // is a base class for GlobalAlias and GlobalIFunc. It contains all common code
12 // for aliases and ifuncs.
13 //
14 //===----------------------------------------------------------------------===//
15
16 #ifndef LLVM_IR_GLOBALINDIRECTSYMBOL_H
17 #define LLVM_IR_GLOBALINDIRECTSYMBOL_H
18
19 #include "llvm/IR/GlobalObject.h"
20 #include "llvm/IR/GlobalValue.h"
21 #include "llvm/IR/OperandTraits.h"
22 #include "llvm/IR/User.h"
23 #include "llvm/IR/Value.h"
24 #include "llvm/Support/Casting.h"
25 #include <cstddef>
26
27 namespace llvm {
28
29 class GlobalIndirectSymbol : public GlobalValue {
30 protected:
31   GlobalIndirectSymbol(Type *Ty, ValueTy VTy, unsigned AddressSpace,
32       LinkageTypes Linkage, const Twine &Name, Constant *Symbol);
33
34 public:
35   GlobalIndirectSymbol(const GlobalIndirectSymbol &) = delete;
36   GlobalIndirectSymbol &operator=(const GlobalIndirectSymbol &) = delete;
37
38   // allocate space for exactly one operand
39   void *operator new(size_t s) {
40     return User::operator new(s, 1);
41   }
42
43   /// Provide fast operand accessors
44   DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Constant);
45
46   /// These methods set and retrieve indirect symbol.
47   void setIndirectSymbol(Constant *Symbol) {
48     setOperand(0, Symbol);
49   }
50   const Constant *getIndirectSymbol() const {
51     return const_cast<GlobalIndirectSymbol *>(this)->getIndirectSymbol();
52   }
53   Constant *getIndirectSymbol() {
54     return getOperand(0);
55   }
56
57   const GlobalObject *getBaseObject() const {
58     return const_cast<GlobalIndirectSymbol *>(this)->getBaseObject();
59   }
60   GlobalObject *getBaseObject() {
61     return dyn_cast<GlobalObject>(getIndirectSymbol()->stripInBoundsOffsets());
62   }
63
64   const GlobalObject *getBaseObject(const DataLayout &DL, APInt &Offset) const {
65     return const_cast<GlobalIndirectSymbol *>(this)->getBaseObject(DL, Offset);
66   }
67   GlobalObject *getBaseObject(const DataLayout &DL, APInt &Offset) {
68     return dyn_cast<GlobalObject>(
69         getIndirectSymbol()->stripAndAccumulateInBoundsConstantOffsets(DL,
70                                                                        Offset));
71   }
72
73   // Methods for support type inquiry through isa, cast, and dyn_cast:
74   static inline bool classof(const Value *V) {
75     return V->getValueID() == Value::GlobalAliasVal ||
76            V->getValueID() == Value::GlobalIFuncVal;
77   }
78 };
79
80 template <>
81 struct OperandTraits<GlobalIndirectSymbol> :
82   public FixedNumOperandTraits<GlobalIndirectSymbol, 1> {
83 };
84
85 DEFINE_TRANSPARENT_OPERAND_ACCESSORS(GlobalIndirectSymbol, Constant)
86
87 } // end namespace llvm
88
89 #endif // LLVM_IR_GLOBALINDIRECTSYMBOL_H