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