#ifndef LLVM_MC_MCSYMBOL_H
#define LLVM_MC_MCSYMBOL_H
-#include <string>
#include "llvm/ADT/StringRef.h"
-#include "llvm/Support/DataTypes.h"
namespace llvm {
+ class MCExpr;
class MCSection;
class MCContext;
class raw_ostream;
/// MCSymbol - Instances of this class represent a symbol name in the MC file,
- /// and MCSymbols are created and unique'd by the MCContext class.
+ /// and MCSymbols are created and unique'd by the MCContext class. MCSymbols
+ /// should only be constructed with valid names for the object file.
///
/// If the symbol is defined/emitted into the current translation unit, the
/// Section member is set to indicate what section it lives in. Otherwise, if
// FIXME: Use a PointerInt wrapper for this?
static const MCSection *AbsolutePseudoSection;
- /// Name - The name of the symbol.
- std::string Name;
+ /// Name - The name of the symbol. The referred-to string data is actually
+ /// held by the StringMap that lives in MCContext.
+ StringRef Name;
/// Section - The section the symbol is defined in. This is null for
/// undefined symbols, and the special AbsolutePseudoSection value for
/// absolute symbols.
const MCSection *Section;
+ /// Value - If non-null, the value for a variable symbol.
+ const MCExpr *Value;
+
/// IsTemporary - True if this is an assembler temporary label, which
/// typically does not survive in the .o file's symbol table. Usually
/// "Lfoo" or ".foo".
unsigned IsTemporary : 1;
-
+
private: // MCContext creates and uniques these.
friend class MCContext;
- MCSymbol(const StringRef &_Name, bool _IsTemporary)
- : Name(_Name), Section(0), IsTemporary(_IsTemporary) {}
-
+ MCSymbol(StringRef name, bool isTemporary)
+ : Name(name), Section(0), Value(0), IsTemporary(isTemporary) {}
+
MCSymbol(const MCSymbol&); // DO NOT IMPLEMENT
void operator=(const MCSymbol&); // DO NOT IMPLEMENT
public:
/// getName - Get the symbol name.
- const std::string &getName() const { return Name; }
+ StringRef getName() const { return Name; }
/// @name Symbol Type
/// @{
return IsTemporary;
}
+ /// @}
+ /// @name Associated Sections
+ /// @{
+
/// isDefined - Check if this symbol is defined (i.e., it has an address).
///
/// Defined symbols are either absolute or in some section.
return !isDefined();
}
- /// isAbsolute - Check if this this is an absolute symbol.
+ /// isAbsolute - Check if this is an absolute symbol.
bool isAbsolute() const {
return Section == AbsolutePseudoSection;
}
/// setAbsolute - Mark the symbol as absolute.
void setAbsolute() { Section = AbsolutePseudoSection; }
+ /// @}
+ /// @name Variable Symbols
+ /// @{
+
+ /// isVariable - Check if this is a variable symbol.
+ bool isVariable() const {
+ return Value != 0;
+ }
+
+ /// getValue() - Get the value for variable symbols, or null if the symbol
+ /// is not a variable.
+ const MCExpr *getValue() const { return Value; }
+
+ void setValue(const MCExpr *Value) {
+ this->Value = Value;
+ }
+
/// @}
/// print - Print the value to the stream \arg OS.
void dump() const;
};
+ inline raw_ostream &operator<<(raw_ostream &OS, const MCSymbol &Sym) {
+ Sym.print(OS);
+ return OS;
+ }
} // end namespace llvm
#endif