Imported Upstream version 5.18.0.207

Former-commit-id: 3b152f462918d427ce18620a2cbe4f8b79650449

external/llvm/lib/DebugInfo/DWARF/DWARFDebugAbbrev.cpp

@@ -1,139 +0,0 @@
-//===- DWARFDebugAbbrev.cpp -----------------------------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/DebugInfo/DWARF/DWARFDebugAbbrev.h"
-#include "llvm/Support/Format.h"
-#include "llvm/Support/raw_ostream.h"
-#include <algorithm>
-#include <cinttypes>
-#include <cstdint>
-
-using namespace llvm;
-
-DWARFAbbreviationDeclarationSet::DWARFAbbreviationDeclarationSet() {
-  clear();
-}
-
-void DWARFAbbreviationDeclarationSet::clear() {
-  Offset = 0;
-  FirstAbbrCode = 0;
-  Decls.clear();
-}
-
-bool DWARFAbbreviationDeclarationSet::extract(DataExtractor Data,
-                                              uint32_t *OffsetPtr) {
-  clear();
-  const uint32_t BeginOffset = *OffsetPtr;
-  Offset = BeginOffset;
-  DWARFAbbreviationDeclaration AbbrDecl;
-  uint32_t PrevAbbrCode = 0;
-  while (AbbrDecl.extract(Data, OffsetPtr)) {
-    if (FirstAbbrCode == 0) {
-      FirstAbbrCode = AbbrDecl.getCode();
-    } else {
-      if (PrevAbbrCode + 1 != AbbrDecl.getCode()) {
-        // Codes are not consecutive, can't do O(1) lookups.
-        FirstAbbrCode = UINT32_MAX;
-      }
-    }
-    PrevAbbrCode = AbbrDecl.getCode();
-    Decls.push_back(std::move(AbbrDecl));
-  }
-  return BeginOffset != *OffsetPtr;
-}
-
-void DWARFAbbreviationDeclarationSet::dump(raw_ostream &OS) const {
-  for (const auto &Decl : Decls)
-    Decl.dump(OS);
-}
-
-const DWARFAbbreviationDeclaration *
-DWARFAbbreviationDeclarationSet::getAbbreviationDeclaration(
-    uint32_t AbbrCode) const {
-  if (FirstAbbrCode == UINT32_MAX) {
-    for (const auto &Decl : Decls) {
-      if (Decl.getCode() == AbbrCode)
-        return &Decl;
-    }
-    return nullptr;
-  }
-  if (AbbrCode < FirstAbbrCode || AbbrCode >= FirstAbbrCode + Decls.size())
-    return nullptr;
-  return &Decls[AbbrCode - FirstAbbrCode];
-}
-
-DWARFDebugAbbrev::DWARFDebugAbbrev() { clear(); }
-
-void DWARFDebugAbbrev::clear() {
-  AbbrDeclSets.clear();
-  PrevAbbrOffsetPos = AbbrDeclSets.end();
-}
-
-void DWARFDebugAbbrev::extract(DataExtractor Data) {
-  clear();
-  this->Data = Data;
-}
-
-void DWARFDebugAbbrev::parse() const {
-  if (!Data)
-    return;
-  uint32_t Offset = 0;
-  DWARFAbbreviationDeclarationSet AbbrDecls;
-  auto I = AbbrDeclSets.begin();
-  while (Data->isValidOffset(Offset)) {
-    while (I != AbbrDeclSets.end() && I->first < Offset)
-      ++I;
-    uint32_t CUAbbrOffset = Offset;
-    if (!AbbrDecls.extract(*Data, &Offset))
-      break;
-    AbbrDeclSets.insert(I, std::make_pair(CUAbbrOffset, std::move(AbbrDecls)));
-  }
-  Data = None;
-}
-
-void DWARFDebugAbbrev::dump(raw_ostream &OS) const {
-  parse();
-
-  if (AbbrDeclSets.empty()) {
-    OS << "< EMPTY >\n";
-    return;
-  }
-
-  for (const auto &I : AbbrDeclSets) {
-    OS << format("Abbrev table for offset: 0x%8.8" PRIx64 "\n", I.first);
-    I.second.dump(OS);
-  }
-}
-
-const DWARFAbbreviationDeclarationSet*
-DWARFDebugAbbrev::getAbbreviationDeclarationSet(uint64_t CUAbbrOffset) const {
-  const auto End = AbbrDeclSets.end();
-  if (PrevAbbrOffsetPos != End && PrevAbbrOffsetPos->first == CUAbbrOffset) {
-    return &(PrevAbbrOffsetPos->second);
-  }
-
-  const auto Pos = AbbrDeclSets.find(CUAbbrOffset);
-  if (Pos != End) {
-    PrevAbbrOffsetPos = Pos;
-    return &(Pos->second);
-  }
-
-  if (Data && CUAbbrOffset < Data->getData().size()) {
-    uint32_t Offset = CUAbbrOffset;
-    DWARFAbbreviationDeclarationSet AbbrDecls;
-    if (!AbbrDecls.extract(*Data, &Offset))
-      return nullptr;
-    PrevAbbrOffsetPos =
-        AbbrDeclSets.insert(std::make_pair(CUAbbrOffset, std::move(AbbrDecls)))
-            .first;
-    return &PrevAbbrOffsetPos->second;
-  }
-
-  return nullptr;
-}