llvm/lib/CodeGen/NonRelocatableStringpool.cpp

   1 //===-- NonRelocatableStringpool.cpp --------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/CodeGen/NonRelocatableStringpool.h"
  10
  11 namespace llvm {
  12
  13 DwarfStringPoolEntryRef NonRelocatableStringpool::getEntry(StringRef S) {
  14   if (S.empty() && !Strings.empty())
  15     return EmptyString;
  16
  17   if (Translator)
  18     S = Translator(S);
  19   auto I = Strings.insert({S, DwarfStringPoolEntry()});
  20   auto &Entry = I.first->second;
  21   if (I.second || !Entry.isIndexed()) {
  22     Entry.Index = NumEntries++;
  23     Entry.Offset = CurrentEndOffset;
  24     Entry.Symbol = nullptr;
  25     CurrentEndOffset += S.size() + 1;
  26   }
  27   return DwarfStringPoolEntryRef(*I.first, true);
  28 }
  29
  30 StringRef NonRelocatableStringpool::internString(StringRef S) {
  31   DwarfStringPoolEntry Entry{nullptr, 0, DwarfStringPoolEntry::NotIndexed};
  32
  33   if (Translator)
  34     S = Translator(S);
  35
  36   auto InsertResult = Strings.insert({S, Entry});
  37   return InsertResult.first->getKey();
  38 }
  39
  40 std::vector<DwarfStringPoolEntryRef>
  41 NonRelocatableStringpool::getEntriesForEmission() const {
  42   std::vector<DwarfStringPoolEntryRef> Result;
  43   Result.reserve(Strings.size());
  44   for (const auto &E : Strings)
  45     if (E.getValue().isIndexed())
  46       Result.emplace_back(E, true);
  47   llvm::sort(Result, [](const DwarfStringPoolEntryRef A,
  48                         const DwarfStringPoolEntryRef B) {
  49     return A.getIndex() < B.getIndex();
  50   });
  51   return Result;
  52 }
  53
  54 } // namespace llvm