1*0a6a1f1dSLionel Sambuc //===-- llvm/CodeGen/AddressPool.h - Dwarf Debug Framework -----*- C++ -*--===// 2*0a6a1f1dSLionel Sambuc // 3*0a6a1f1dSLionel Sambuc // The LLVM Compiler Infrastructure 4*0a6a1f1dSLionel Sambuc // 5*0a6a1f1dSLionel Sambuc // This file is distributed under the University of Illinois Open Source 6*0a6a1f1dSLionel Sambuc // License. See LICENSE.TXT for details. 7*0a6a1f1dSLionel Sambuc // 8*0a6a1f1dSLionel Sambuc //===----------------------------------------------------------------------===// 9*0a6a1f1dSLionel Sambuc 10*0a6a1f1dSLionel Sambuc #ifndef LLVM_LIB_CODEGEN_ASMPRINTER_ADDRESSPOOL_H 11*0a6a1f1dSLionel Sambuc #define LLVM_LIB_CODEGEN_ASMPRINTER_ADDRESSPOOL_H 12*0a6a1f1dSLionel Sambuc 13*0a6a1f1dSLionel Sambuc #include "llvm/ADT/DenseMap.h" 14*0a6a1f1dSLionel Sambuc 15*0a6a1f1dSLionel Sambuc namespace llvm { 16*0a6a1f1dSLionel Sambuc class MCSection; 17*0a6a1f1dSLionel Sambuc class MCSymbol; 18*0a6a1f1dSLionel Sambuc class AsmPrinter; 19*0a6a1f1dSLionel Sambuc // Collection of addresses for this unit and assorted labels. 20*0a6a1f1dSLionel Sambuc // A Symbol->unsigned mapping of addresses used by indirect 21*0a6a1f1dSLionel Sambuc // references. 22*0a6a1f1dSLionel Sambuc class AddressPool { 23*0a6a1f1dSLionel Sambuc struct AddressPoolEntry { 24*0a6a1f1dSLionel Sambuc unsigned Number; 25*0a6a1f1dSLionel Sambuc bool TLS; AddressPoolEntryAddressPoolEntry26*0a6a1f1dSLionel Sambuc AddressPoolEntry(unsigned Number, bool TLS) : Number(Number), TLS(TLS) {} 27*0a6a1f1dSLionel Sambuc }; 28*0a6a1f1dSLionel Sambuc DenseMap<const MCSymbol *, AddressPoolEntry> Pool; 29*0a6a1f1dSLionel Sambuc 30*0a6a1f1dSLionel Sambuc /// Record whether the AddressPool has been queried for an address index since 31*0a6a1f1dSLionel Sambuc /// the last "resetUsedFlag" call. Used to implement type unit fallback - a 32*0a6a1f1dSLionel Sambuc /// type that references addresses cannot be placed in a type unit when using 33*0a6a1f1dSLionel Sambuc /// fission. 34*0a6a1f1dSLionel Sambuc bool HasBeenUsed; 35*0a6a1f1dSLionel Sambuc 36*0a6a1f1dSLionel Sambuc public: AddressPool()37*0a6a1f1dSLionel Sambuc AddressPool() : HasBeenUsed(false) {} 38*0a6a1f1dSLionel Sambuc 39*0a6a1f1dSLionel Sambuc /// \brief Returns the index into the address pool with the given 40*0a6a1f1dSLionel Sambuc /// label/symbol. 41*0a6a1f1dSLionel Sambuc unsigned getIndex(const MCSymbol *Sym, bool TLS = false); 42*0a6a1f1dSLionel Sambuc 43*0a6a1f1dSLionel Sambuc void emit(AsmPrinter &Asm, const MCSection *AddrSection); 44*0a6a1f1dSLionel Sambuc isEmpty()45*0a6a1f1dSLionel Sambuc bool isEmpty() { return Pool.empty(); } 46*0a6a1f1dSLionel Sambuc hasBeenUsed()47*0a6a1f1dSLionel Sambuc bool hasBeenUsed() const { return HasBeenUsed; } 48*0a6a1f1dSLionel Sambuc resetUsedFlag()49*0a6a1f1dSLionel Sambuc void resetUsedFlag() { HasBeenUsed = false; } 50*0a6a1f1dSLionel Sambuc }; 51*0a6a1f1dSLionel Sambuc } 52*0a6a1f1dSLionel Sambuc #endif 53