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