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
15using namespace llvm;
16
17class MCExpr;
18
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.
27void AddressPool::emit(AsmPrinter &Asm, const 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