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(Type *Ty, ValueTy VTy, Use *Ops, unsigned NumOps,
31 LinkageTypes Linkage, const Twine &Name,
32 unsigned AddressSpace = 0)
33 : GlobalValue(Ty, VTy, Ops, NumOps, Linkage, Name, AddressSpace),
35 setGlobalValueSubClassData(0);
38 std::string Section; // Section to emit this into, empty means default
40 static const unsigned AlignmentBits = 5;
41 static const unsigned GlobalObjectSubClassDataBits =
42 GlobalValueSubClassDataBits - AlignmentBits;
45 static const unsigned AlignmentMask = (1 << AlignmentBits) - 1;
48 unsigned getAlignment() const {
49 unsigned Data = getGlobalValueSubClassData();
50 unsigned AlignmentData = Data & AlignmentMask;
51 return (1u << AlignmentData) >> 1;
53 void setAlignment(unsigned Align);
55 unsigned getGlobalObjectSubClassData() const;
56 void setGlobalObjectSubClassData(unsigned Val);
58 bool hasSection() const { return !StringRef(getSection()).empty(); }
59 const char *getSection() const { return Section.c_str(); }
60 void setSection(StringRef S);
62 bool hasComdat() const { return getComdat() != nullptr; }
63 const Comdat *getComdat() const { return ObjComdat; }
64 Comdat *getComdat() { return ObjComdat; }
65 void setComdat(Comdat *C) { ObjComdat = C; }
67 void copyAttributesFrom(const GlobalValue *Src) override;
69 // Methods for support type inquiry through isa, cast, and dyn_cast:
70 static inline bool classof(const Value *V) {
71 return V->getValueID() == Value::FunctionVal ||
72 V->getValueID() == Value::GlobalVariableVal;
76 } // End llvm namespace