10b57cec5SDimitry Andric //===- llvm/CodeGen/AddressPool.h - Dwarf Debug Framework -------*- C++ -*-===// 20b57cec5SDimitry Andric // 30b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 40b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 50b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 60b57cec5SDimitry Andric // 70b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 80b57cec5SDimitry Andric 90b57cec5SDimitry Andric #ifndef LLVM_LIB_CODEGEN_ASMPRINTER_ADDRESSPOOL_H 100b57cec5SDimitry Andric #define LLVM_LIB_CODEGEN_ASMPRINTER_ADDRESSPOOL_H 110b57cec5SDimitry Andric 120b57cec5SDimitry Andric #include "llvm/ADT/DenseMap.h" 130b57cec5SDimitry Andric 140b57cec5SDimitry Andric namespace llvm { 150b57cec5SDimitry Andric 160b57cec5SDimitry Andric class AsmPrinter; 170b57cec5SDimitry Andric class MCSection; 180b57cec5SDimitry Andric class MCSymbol; 190b57cec5SDimitry Andric 200b57cec5SDimitry Andric // Collection of addresses for this unit and assorted labels. 210b57cec5SDimitry Andric // A Symbol->unsigned mapping of addresses used by indirect 220b57cec5SDimitry Andric // references. 230b57cec5SDimitry Andric class AddressPool { 240b57cec5SDimitry Andric struct AddressPoolEntry { 250b57cec5SDimitry Andric unsigned Number; 260b57cec5SDimitry Andric bool TLS; 270b57cec5SDimitry Andric AddressPoolEntryAddressPoolEntry280b57cec5SDimitry Andric AddressPoolEntry(unsigned Number, bool TLS) : Number(Number), TLS(TLS) {} 290b57cec5SDimitry Andric }; 300b57cec5SDimitry Andric DenseMap<const MCSymbol *, AddressPoolEntry> Pool; 310b57cec5SDimitry Andric 320b57cec5SDimitry Andric /// Record whether the AddressPool has been queried for an address index since 330b57cec5SDimitry Andric /// the last "resetUsedFlag" call. Used to implement type unit fallback - a 340b57cec5SDimitry Andric /// type that references addresses cannot be placed in a type unit when using 350b57cec5SDimitry Andric /// fission. 360b57cec5SDimitry Andric bool HasBeenUsed = false; 370b57cec5SDimitry Andric 380b57cec5SDimitry Andric public: 390b57cec5SDimitry Andric AddressPool() = default; 400b57cec5SDimitry Andric 410b57cec5SDimitry Andric /// Returns the index into the address pool with the given 420b57cec5SDimitry Andric /// label/symbol. 430b57cec5SDimitry Andric unsigned getIndex(const MCSymbol *Sym, bool TLS = false); 440b57cec5SDimitry Andric 450b57cec5SDimitry Andric void emit(AsmPrinter &Asm, MCSection *AddrSection); 460b57cec5SDimitry Andric isEmpty()470b57cec5SDimitry Andric bool isEmpty() { return Pool.empty(); } 480b57cec5SDimitry Andric hasBeenUsed()490b57cec5SDimitry Andric bool hasBeenUsed() const { return HasBeenUsed; } 500b57cec5SDimitry Andric 51*e8d8bef9SDimitry Andric void resetUsedFlag(bool HasBeenUsed = false) { this->HasBeenUsed = HasBeenUsed; } 520b57cec5SDimitry Andric getLabel()530b57cec5SDimitry Andric MCSymbol *getLabel() { return AddressTableBaseSym; } setLabel(MCSymbol * Sym)540b57cec5SDimitry Andric void setLabel(MCSymbol *Sym) { AddressTableBaseSym = Sym; } 550b57cec5SDimitry Andric 560b57cec5SDimitry Andric private: 570b57cec5SDimitry Andric MCSymbol *emitHeader(AsmPrinter &Asm, MCSection *Section); 580b57cec5SDimitry Andric 590b57cec5SDimitry Andric /// Symbol designates the start of the contribution to the address table. 600b57cec5SDimitry Andric MCSymbol *AddressTableBaseSym = nullptr; 610b57cec5SDimitry Andric }; 620b57cec5SDimitry Andric 630b57cec5SDimitry Andric } // end namespace llvm 640b57cec5SDimitry Andric 650b57cec5SDimitry Andric #endif // LLVM_LIB_CODEGEN_ASMPRINTER_ADDRESSPOOL_H 66