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      1 //===-- llvm/GlobalObject.h - Class to represent a global object *- 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 represents an independent object. That is, a function or a global
     11 // variable, but not an alias.
     12 //
     13 //===----------------------------------------------------------------------===//
     14 
     15 #ifndef LLVM_IR_GLOBALOBJECT_H
     16 #define LLVM_IR_GLOBALOBJECT_H
     17 
     18 #include "llvm/IR/Constant.h"
     19 #include "llvm/IR/DerivedTypes.h"
     20 #include "llvm/IR/GlobalValue.h"
     21 
     22 namespace llvm {
     23 class Comdat;
     24 class Module;
     25 
     26 class GlobalObject : public GlobalValue {
     27   GlobalObject(const GlobalObject &) LLVM_DELETED_FUNCTION;
     28 
     29 protected:
     30   GlobalObject(Type *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);
     34   }
     35 
     36   std::string Section;     // Section to emit this into, empty means default
     37   Comdat *ObjComdat;
     38 public:
     39   unsigned getAlignment() const {
     40     return (1u << getGlobalValueSubClassData()) >> 1;
     41   }
     42   void setAlignment(unsigned Align);
     43 
     44   bool hasSection() const { return !StringRef(getSection()).empty(); }
     45   const char *getSection() const { return Section.c_str(); }
     46   void setSection(StringRef S);
     47 
     48   bool hasComdat() const { return getComdat() != nullptr; }
     49   const Comdat *getComdat() const { return ObjComdat; }
     50   Comdat *getComdat() { return ObjComdat; }
     51   void setComdat(Comdat *C) { ObjComdat = C; }
     52 
     53   void copyAttributesFrom(const GlobalValue *Src) override;
     54 
     55   // Methods for support type inquiry through isa, cast, and dyn_cast:
     56   static inline bool classof(const Value *V) {
     57     return V->getValueID() == Value::FunctionVal ||
     58            V->getValueID() == Value::GlobalVariableVal;
     59   }
     60 };
     61 
     62 } // End llvm namespace
     63 
     64 #endif
     65