1 //===-- llvm/GlobalObject.h - Class to represent global objects -*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This represents an independent object. That is, a function or a global
11 // variable, but not an alias.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_IR_GLOBALOBJECT_H
16 #define LLVM_IR_GLOBALOBJECT_H
18 #include "llvm/IR/Constant.h"
19 #include "llvm/IR/DerivedTypes.h"
20 #include "llvm/IR/GlobalValue.h"
26 class GlobalObject : public GlobalValue {
27 GlobalObject(const GlobalObject &) = delete;
30 GlobalObject(PointerType *Ty, ValueTy VTy, Use *Ops, unsigned NumOps,
31 LinkageTypes Linkage, const Twine &Name) = delete;
32 GlobalObject(Type *Ty, ValueTy VTy, Use *Ops, unsigned NumOps,
33 LinkageTypes Linkage, const Twine &Name,
34 unsigned AddressSpace = 0)
35 : GlobalValue(PointerType::get(Ty, AddressSpace), VTy, Ops, NumOps,
38 setGlobalValueSubClassData(0);
41 std::string Section; // Section to emit this into, empty means default
43 static const unsigned AlignmentBits = 5;
44 static const unsigned GlobalObjectSubClassDataBits =
45 GlobalValueSubClassDataBits - AlignmentBits;
48 static const unsigned AlignmentMask = (1 << AlignmentBits) - 1;
51 unsigned getAlignment() const {
52 unsigned Data = getGlobalValueSubClassData();
53 unsigned AlignmentData = Data & AlignmentMask;
54 return (1u << AlignmentData) >> 1;
56 void setAlignment(unsigned Align);
58 unsigned getGlobalObjectSubClassData() const;
59 void setGlobalObjectSubClassData(unsigned Val);
61 bool hasSection() const { return !StringRef(getSection()).empty(); }
62 const char *getSection() const { return Section.c_str(); }
63 void setSection(StringRef S);
65 bool hasComdat() const { return getComdat() != nullptr; }
66 const Comdat *getComdat() const { return ObjComdat; }
67 Comdat *getComdat() { return ObjComdat; }
68 void setComdat(Comdat *C) { ObjComdat = C; }
70 void copyAttributesFrom(const GlobalValue *Src) override;
72 // Methods for support type inquiry through isa, cast, and dyn_cast:
73 static inline bool classof(const Value *V) {
74 return V->getValueID() == Value::FunctionVal ||
75 V->getValueID() == Value::GlobalVariableVal;
79 } // End llvm namespace