2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
//===- llvm/CodeGen/AddressPool.h - Dwarf Debug Framework -------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_ADDRESSPOOL_H
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#define LLVM_LIB_CODEGEN_ASMPRINTER_ADDRESSPOOL_H
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#include "llvm/ADT/DenseMap.h"
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namespace llvm {
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class AsmPrinter;
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class MCSection;
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class MCSymbol;
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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 = false;
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public:
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AddressPool() = default;
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/// 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, 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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MCSymbol *getLabel() { return AddressTableBaseSym; }
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void setLabel(MCSymbol *Sym) { AddressTableBaseSym = Sym; }
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private:
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void emitHeader(AsmPrinter &Asm, MCSection *Section);
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/// Symbol designates the start of the contribution to the address table.
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MCSymbol *AddressTableBaseSym = nullptr;
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};
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} // end namespace llvm
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#endif // LLVM_LIB_CODEGEN_ASMPRINTER_ADDRESSPOOL_H
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