1 //===-- llvm/CodeGen/AddressPool.cpp - Dwarf Debug Framework ---*- C++ -*--===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "AddressPool.h" 11 #include "llvm/CodeGen/AsmPrinter.h" 12 #include "llvm/MC/MCStreamer.h" 13 #include "llvm/Target/TargetLoweringObjectFile.h" 14 15 using namespace llvm; 16 17 class MCExpr; 18 getIndex(const MCSymbol * Sym,bool TLS)19unsigned AddressPool::getIndex(const MCSymbol *Sym, bool TLS) { 20 HasBeenUsed = true; 21 auto IterBool = 22 Pool.insert(std::make_pair(Sym, AddressPoolEntry(Pool.size(), TLS))); 23 return IterBool.first->second.Number; 24 } 25 26 // Emit addresses into the section given. emit(AsmPrinter & Asm,MCSection * AddrSection)27void AddressPool::emit(AsmPrinter &Asm, MCSection *AddrSection) { 28 if (Pool.empty()) 29 return; 30 31 // Start the dwarf addr section. 32 Asm.OutStreamer->SwitchSection(AddrSection); 33 34 // Order the address pool entries by ID 35 SmallVector<const MCExpr *, 64> Entries(Pool.size()); 36 37 for (const auto &I : Pool) 38 Entries[I.second.Number] = 39 I.second.TLS 40 ? Asm.getObjFileLowering().getDebugThreadLocalSymbol(I.first) 41 : MCSymbolRefExpr::create(I.first, Asm.OutContext); 42 43 for (const MCExpr *Entry : Entries) 44 Asm.OutStreamer->EmitValue(Entry, Asm.getDataLayout().getPointerSize()); 45 } 46