#define LLVM_MC_MCSYMBOL_H
#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/Compiler.h"
namespace llvm {
class MCExpr;
/// "Lfoo" or ".foo".
unsigned IsTemporary : 1;
- /// IsUsedInExpr - True if this symbol has been used in an expression and
- /// cannot be redefined.
- unsigned IsUsedInExpr : 1;
+ /// IsUsed - True if this symbol has been used.
+ mutable unsigned IsUsed : 1;
private: // MCContext creates and uniques these.
+ friend class MCExpr;
friend class MCContext;
MCSymbol(StringRef name, bool isTemporary)
- : Name(name), Section(0), Value(0),
- IsTemporary(isTemporary), IsUsedInExpr(false) {}
+ : Name(name), Section(nullptr), Value(nullptr),
+ IsTemporary(isTemporary), IsUsed(false) {}
- MCSymbol(const MCSymbol&); // DO NOT IMPLEMENT
- void operator=(const MCSymbol&); // DO NOT IMPLEMENT
+ MCSymbol(const MCSymbol&) LLVM_DELETED_FUNCTION;
+ void operator=(const MCSymbol&) LLVM_DELETED_FUNCTION;
public:
/// getName - Get the symbol name.
StringRef getName() const { return Name; }
/// isTemporary - Check if this is an assembler temporary symbol.
bool isTemporary() const { return IsTemporary; }
- /// isUsedInExpr - Check if this is an assembler temporary symbol.
- bool isUsedInExpr() const { return IsUsedInExpr; }
- void setUsedInExpr(bool Value) { IsUsedInExpr = Value; }
+ /// isUsed - Check if this is used.
+ bool isUsed() const { return IsUsed; }
+ void setUsed(bool Value) const { IsUsed = Value; }
/// @}
/// @name Associated Sections
///
/// Defined symbols are either absolute or in some section.
bool isDefined() const {
- return Section != 0;
+ return Section != nullptr;
}
/// isInSection - Check if this symbol is defined in some section (i.e., it
return *Section;
}
- /// setSection - Mark the symbol as defined in the section \arg S.
+ /// setSection - Mark the symbol as defined in the section \p S.
void setSection(const MCSection &S) { Section = &S; }
/// setUndefined - Mark the symbol as undefined.
void setUndefined() {
- Section = 0;
+ Section = nullptr;
}
/// setAbsolute - Mark the symbol as absolute.
/// isVariable - Check if this is a variable symbol.
bool isVariable() const {
- return Value != 0;
+ return Value != nullptr;
}
- /// getValue() - Get the value for variable symbols.
+ /// getVariableValue() - Get the value for variable symbols.
const MCExpr *getVariableValue() const {
assert(isVariable() && "Invalid accessor!");
+ IsUsed = true;
return Value;
}
+ // AliasedSymbol() - If this is an alias (a = b), return the symbol
+ // we ultimately point to. For a non-alias, this just returns the symbol
+ // itself.
+ const MCSymbol &AliasedSymbol() const;
+
void setVariableValue(const MCExpr *Value);
/// @}
- /// print - Print the value to the stream \arg OS.
+ /// print - Print the value to the stream \p OS.
void print(raw_ostream &OS) const;
/// dump - Print the value to stderr.