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//===-- llvm/CodeGen/AddressPool.h - Dwarf Debug Framework -----*- C++ -*--===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_ADDRESSPOOL_H
#define LLVM_LIB_CODEGEN_ASMPRINTER_ADDRESSPOOL_H
#include "llvm/ADT/DenseMap.h"
namespace llvm {
class MCSection;
class MCSymbol;
class AsmPrinter;
// Collection of addresses for this unit and assorted labels.
// A Symbol->unsigned mapping of addresses used by indirect
// references.
class AddressPool {
struct AddressPoolEntry {
unsigned Number;
bool TLS;
AddressPoolEntry(unsigned Number, bool TLS) : Number(Number), TLS(TLS) {}
};
DenseMap<const MCSymbol *, AddressPoolEntry> Pool;
/// Record whether the AddressPool has been queried for an address index since
/// the last "resetUsedFlag" call. Used to implement type unit fallback - a
/// type that references addresses cannot be placed in a type unit when using
/// fission.
bool HasBeenUsed;
public:
AddressPool() : HasBeenUsed(false) {}
/// \brief Returns the index into the address pool with the given
/// label/symbol.
unsigned getIndex(const MCSymbol *Sym, bool TLS = false);
void emit(AsmPrinter &Asm, const MCSection *AddrSection);
bool isEmpty() { return Pool.empty(); }
bool hasBeenUsed() const { return HasBeenUsed; }
void resetUsedFlag() { HasBeenUsed = false; }
};
}
#endif
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