Imported Upstream version 5.18.0.182

Former-commit-id: f9d55cf82631bfd710c387739687e5845296aea1

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

@@ -1,70 +0,0 @@
-//===- DWARFDebugInfoEntry.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/DWARFDebugInfoEntry.h"
-#include "llvm/ADT/Optional.h"
-#include "llvm/DebugInfo/DWARF/DWARFDebugAbbrev.h"
-#include "llvm/DebugInfo/DWARF/DWARFFormValue.h"
-#include "llvm/DebugInfo/DWARF/DWARFUnit.h"
-#include "llvm/Support/DataExtractor.h"
-#include <cstddef>
-#include <cstdint>
-
-using namespace llvm;
-using namespace dwarf;
-
-bool DWARFDebugInfoEntry::extractFast(const DWARFUnit &U,
-                                             uint32_t *OffsetPtr) {
-  DWARFDataExtractor DebugInfoData = U.getDebugInfoExtractor();
-  const uint32_t UEndOffset = U.getNextUnitOffset();
-  return extractFast(U, OffsetPtr, DebugInfoData, UEndOffset, 0);
-}
-
-bool DWARFDebugInfoEntry::extractFast(const DWARFUnit &U, uint32_t *OffsetPtr,
-                                      const DWARFDataExtractor &DebugInfoData,
-                                      uint32_t UEndOffset, uint32_t D) {
-  Offset = *OffsetPtr;
-  Depth = D;
-  if (Offset >= UEndOffset || !DebugInfoData.isValidOffset(Offset))
-    return false;
-  uint64_t AbbrCode = DebugInfoData.getULEB128(OffsetPtr);
-  if (0 == AbbrCode) {
-    // NULL debug tag entry.
-    AbbrevDecl = nullptr;
-    return true;
-  }
-  AbbrevDecl = U.getAbbreviations()->getAbbreviationDeclaration(AbbrCode);
-  if (nullptr == AbbrevDecl) {
-    // Restore the original offset.
-    *OffsetPtr = Offset;
-    return false;
-  }
-  // See if all attributes in this DIE have fixed byte sizes. If so, we can
-  // just add this size to the offset to skip to the next DIE.
-  if (Optional<size_t> FixedSize = AbbrevDecl->getFixedAttributesByteSize(U)) {
-    *OffsetPtr += *FixedSize;
-    return true;
-  }
-
-  // Skip all data in the .debug_info for the attributes
-  for (const auto &AttrSpec : AbbrevDecl->attributes()) {
-    // Check if this attribute has a fixed byte size.
-    if (auto FixedSize = AttrSpec.getByteSize(U)) {
-      // Attribute byte size if fixed, just add the size to the offset.
-      *OffsetPtr += *FixedSize;
-    } else if (!DWARFFormValue::skipValue(AttrSpec.Form, DebugInfoData,
-                                          OffsetPtr, U.getFormParams())) {
-      // We failed to skip this attribute's value, restore the original offset
-      // and return the failure status.
-      *OffsetPtr = Offset;
-      return false;
-    }
-  }
-  return true;
-}