Imported Upstream version 5.18.0.207

Former-commit-id: 3b152f462918d427ce18620a2cbe4f8b79650449

external/llvm/lib/CodeGen/AsmPrinter/DIEHash.h

@@ -1,110 +0,0 @@
-//===-- llvm/CodeGen/DIEHash.h - Dwarf Hashing Framework -------*- C++ -*--===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file contains support for DWARF4 hashing of DIEs.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DIEHASH_H
-#define LLVM_LIB_CODEGEN_ASMPRINTER_DIEHASH_H
-
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/CodeGen/DIE.h"
-#include "llvm/Support/MD5.h"
-
-namespace llvm {
-
-class AsmPrinter;
-class CompileUnit;
-
-/// \brief An object containing the capability of hashing and adding hash
-/// attributes onto a DIE.
-class DIEHash {
-  // Collection of all attributes used in hashing a particular DIE.
-  struct DIEAttrs {
-#define HANDLE_DIE_HASH_ATTR(NAME) DIEValue NAME;
-#include "DIEHashAttributes.def"
-  };
-
-public:
-  DIEHash(AsmPrinter *A = nullptr) : AP(A) {}
-
-  /// \brief Computes the CU signature.
-  uint64_t computeCUSignature(StringRef DWOName, const DIE &Die);
-
-  /// \brief Computes the type signature.
-  uint64_t computeTypeSignature(const DIE &Die);
-
-  // Helper routines to process parts of a DIE.
-private:
-  /// \brief Adds the parent context of \param Die to the hash.
-  void addParentContext(const DIE &Die);
-
-  /// \brief Adds the attributes of \param Die to the hash.
-  void addAttributes(const DIE &Die);
-
-  /// \brief Computes the full DWARF4 7.27 hash of the DIE.
-  void computeHash(const DIE &Die);
-
-  // Routines that add DIEValues to the hash.
-public:
-  /// \brief Adds \param Value to the hash.
-  void update(uint8_t Value) { Hash.update(Value); }
-
-  /// \brief Encodes and adds \param Value to the hash as a ULEB128.
-  void addULEB128(uint64_t Value);
-
-  /// \brief Encodes and adds \param Value to the hash as a SLEB128.
-  void addSLEB128(int64_t Value);
-
-private:
-  /// \brief Adds \param Str to the hash and includes a NULL byte.
-  void addString(StringRef Str);
-
-  /// \brief Collects the attributes of DIE \param Die into the \param Attrs
-  /// structure.
-  void collectAttributes(const DIE &Die, DIEAttrs &Attrs);
-
-  /// \brief Hashes the attributes in \param Attrs in order.
-  void hashAttributes(const DIEAttrs &Attrs, dwarf::Tag Tag);
-
-  /// \brief Hashes the data in a block like DIEValue, e.g. DW_FORM_block or
-  /// DW_FORM_exprloc.
-  void hashBlockData(const DIE::const_value_range &Values);
-
-  /// \brief Hashes the contents pointed to in the .debug_loc section.
-  void hashLocList(const DIELocList &LocList);
-
-  /// \brief Hashes an individual attribute.
-  void hashAttribute(const DIEValue &Value, dwarf::Tag Tag);
-
-  /// \brief Hashes an attribute that refers to another DIE.
-  void hashDIEEntry(dwarf::Attribute Attribute, dwarf::Tag Tag,
-                    const DIE &Entry);
-
-  /// \brief Hashes a reference to a named type in such a way that is
-  /// independent of whether that type is described by a declaration or a
-  /// definition.
-  void hashShallowTypeReference(dwarf::Attribute Attribute, const DIE &Entry,
-                                StringRef Name);
-
-  /// \brief Hashes a reference to a previously referenced type DIE.
-  void hashRepeatedTypeReference(dwarf::Attribute Attribute,
-                                 unsigned DieNumber);
-
-  void hashNestedType(const DIE &Die, StringRef Name);
-
-private:
-  MD5 Hash;
-  AsmPrinter *AP;
-  DenseMap<const DIE *, unsigned> Numbering;
-};
-}
-
-#endif