Imported Upstream version 5.18.0.247

Former-commit-id: 2d6af2e4ed0eda5cbdc2946446ef7718456ad190

external/llvm/lib/CodeGen/AsmPrinter/DwarfStringPool.cpp

@@ -1,79 +0,0 @@
-//===- llvm/CodeGen/DwarfStringPool.cpp - Dwarf Debug Framework -----------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "DwarfStringPool.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/Twine.h"
-#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/MC/MCAsmInfo.h"
-#include "llvm/MC/MCStreamer.h"
-#include <cassert>
-#include <utility>
-
-using namespace llvm;
-
-DwarfStringPool::DwarfStringPool(BumpPtrAllocator &A, AsmPrinter &Asm,
-                                 StringRef Prefix)
-    : Pool(A), Prefix(Prefix),
-      ShouldCreateSymbols(Asm.MAI->doesDwarfUseRelocationsAcrossSections()) {}
-
-DwarfStringPool::EntryRef DwarfStringPool::getEntry(AsmPrinter &Asm,
-                                                    StringRef Str) {
-  auto I = Pool.insert(std::make_pair(Str, EntryTy()));
-  if (I.second) {
-    auto &Entry = I.first->second;
-    Entry.Index = Pool.size() - 1;
-    Entry.Offset = NumBytes;
-    Entry.Symbol = ShouldCreateSymbols ? Asm.createTempSymbol(Prefix) : nullptr;
-
-    NumBytes += Str.size() + 1;
-    assert(NumBytes > Entry.Offset && "Unexpected overflow");
-  }
-  return EntryRef(*I.first);
-}
-
-void DwarfStringPool::emit(AsmPrinter &Asm, MCSection *StrSection,
-                           MCSection *OffsetSection) {
-  if (Pool.empty())
-    return;
-
-  // Start the dwarf str section.
-  Asm.OutStreamer->SwitchSection(StrSection);
-
-  // Get all of the string pool entries and put them in an array by their ID so
-  // we can sort them.
-  SmallVector<const StringMapEntry<EntryTy> *, 64> Entries(Pool.size());
-
-  for (const auto &E : Pool)
-    Entries[E.getValue().Index] = &E;
-
-  for (const auto &Entry : Entries) {
-    assert(ShouldCreateSymbols == static_cast<bool>(Entry->getValue().Symbol) &&
-           "Mismatch between setting and entry");
-
-    // Emit a label for reference from debug information entries.
-    if (ShouldCreateSymbols)
-      Asm.OutStreamer->EmitLabel(Entry->getValue().Symbol);
-
-    // Emit the string itself with a terminating null byte.
-    Asm.OutStreamer->AddComment("string offset=" +
-                                Twine(Entry->getValue().Offset));
-    Asm.OutStreamer->EmitBytes(
-        StringRef(Entry->getKeyData(), Entry->getKeyLength() + 1));
-  }
-
-  // If we've got an offset section go ahead and emit that now as well.
-  if (OffsetSection) {
-    Asm.OutStreamer->SwitchSection(OffsetSection);
-    unsigned size = 4; // FIXME: DWARF64 is 8.
-    for (const auto &Entry : Entries)
-      Asm.OutStreamer->EmitIntValue(Entry->getValue().Offset, size);
-  }
-}