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annotate lib/CodeGen/AsmPrinter/AddressPool.cpp @ 117:facf19d07cd9

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author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Wed, 24 Aug 2016 20:10:41 +0900
parents afa8332a0e37
children 1172e4bd9c6f
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1 //===-- llvm/CodeGen/AddressPool.cpp - Dwarf Debug Framework ---*- C++ -*--===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9
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10 #include "AddressPool.h"
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11 #include "llvm/CodeGen/AsmPrinter.h"
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12 #include "llvm/MC/MCStreamer.h"
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13 #include "llvm/Target/TargetLoweringObjectFile.h"
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15 using namespace llvm;
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16
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17 class MCExpr;
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18
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19 unsigned AddressPool::getIndex(const MCSymbol *Sym, bool TLS) {
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20 HasBeenUsed = true;
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21 auto IterBool =
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22 Pool.insert(std::make_pair(Sym, AddressPoolEntry(Pool.size(), TLS)));
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23 return IterBool.first->second.Number;
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24 }
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26 // Emit addresses into the section given.
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27 void AddressPool::emit(AsmPrinter &Asm, MCSection *AddrSection) {
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28 if (Pool.empty())
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29 return;
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31 // Start the dwarf addr section.
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32 Asm.OutStreamer->SwitchSection(AddrSection);
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34 // Order the address pool entries by ID
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35 SmallVector<const MCExpr *, 64> Entries(Pool.size());
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36
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37 for (const auto &I : Pool)
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38 Entries[I.second.Number] =
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39 I.second.TLS
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40 ? Asm.getObjFileLowering().getDebugThreadLocalSymbol(I.first)
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41 : MCSymbolRefExpr::create(I.first, Asm.OutContext);
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43 for (const MCExpr *Entry : Entries)
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44 Asm.OutStreamer->EmitValue(Entry, Asm.getDataLayout().getPointerSize());
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45 }