Intermediate changes

commit_hash:2ec2671384dd8e604d41bc5c52c2f7858e4afea6

1 files changed, 0 insertions, 441 deletions

diff --git a/contrib/libs/llvm14/lib/CodeGen/AsmPrinter/DIEHash.cpp b/contrib/libs/llvm14/lib/CodeGen/AsmPrinter/DIEHash.cpp
deleted file mode 100644
index e175854f7b9..00000000000
--- a/contrib/libs/llvm14/lib/CodeGen/AsmPrinter/DIEHash.cpp
+++ /dev/null
@@ -1,441 +0,0 @@
-//===-- llvm/CodeGen/DIEHash.cpp - Dwarf Hashing Framework ----------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file contains support for DWARF4 hashing of DIEs.
-//
-//===----------------------------------------------------------------------===//
-
-#include "DIEHash.h"
-#include "ByteStreamer.h"
-#include "DwarfCompileUnit.h"
-#include "DwarfDebug.h"
-#include "llvm/ADT/ArrayRef.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/BinaryFormat/Dwarf.h"
-#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/Endian.h"
-#include "llvm/Support/raw_ostream.h"
-
-using namespace llvm;
-
-#define DEBUG_TYPE "dwarfdebug"
-
-/// Grabs the string in whichever attribute is passed in and returns
-/// a reference to it.
-static StringRef getDIEStringAttr(const DIE &Die, uint16_t Attr) {
-  // Iterate through all the attributes until we find the one we're
-  // looking for, if we can't find it return an empty string.
-  for (const auto &V : Die.values())
-    if (V.getAttribute() == Attr)
-      return V.getDIEString().getString();
-
-  return StringRef("");
-}
-
-/// Adds the string in \p Str to the hash. This also hashes
-/// a trailing NULL with the string.
-void DIEHash::addString(StringRef Str) {
-  LLVM_DEBUG(dbgs() << "Adding string " << Str << " to hash.\n");
-  Hash.update(Str);
-  Hash.update(makeArrayRef((uint8_t)'\0'));
-}
-
-// FIXME: The LEB128 routines are copied and only slightly modified out of
-// LEB128.h.
-
-/// Adds the unsigned in \p Value to the hash encoded as a ULEB128.
-void DIEHash::addULEB128(uint64_t Value) {
-  LLVM_DEBUG(dbgs() << "Adding ULEB128 " << Value << " to hash.\n");
-  do {
-    uint8_t Byte = Value & 0x7f;
-    Value >>= 7;
-    if (Value != 0)
-      Byte |= 0x80; // Mark this byte to show that more bytes will follow.
-    Hash.update(Byte);
-  } while (Value != 0);
-}
-
-void DIEHash::addSLEB128(int64_t Value) {
-  LLVM_DEBUG(dbgs() << "Adding ULEB128 " << Value << " to hash.\n");
-  bool More;
-  do {
-    uint8_t Byte = Value & 0x7f;
-    Value >>= 7;
-    More = !((((Value == 0) && ((Byte & 0x40) == 0)) ||
-              ((Value == -1) && ((Byte & 0x40) != 0))));
-    if (More)
-      Byte |= 0x80; // Mark this byte to show that more bytes will follow.
-    Hash.update(Byte);
-  } while (More);
-}
-
-/// Including \p Parent adds the context of Parent to the hash..
-void DIEHash::addParentContext(const DIE &Parent) {
-
-  LLVM_DEBUG(dbgs() << "Adding parent context to hash...\n");
-
-  // [7.27.2] For each surrounding type or namespace beginning with the
-  // outermost such construct...
-  SmallVector<const DIE *, 1> Parents;
-  const DIE *Cur = &Parent;
-  while (Cur->getParent()) {
-    Parents.push_back(Cur);
-    Cur = Cur->getParent();
-  }
-  assert(Cur->getTag() == dwarf::DW_TAG_compile_unit ||
-         Cur->getTag() == dwarf::DW_TAG_type_unit);
-
-  // Reverse iterate over our list to go from the outermost construct to the
-  // innermost.
-  for (const DIE *Die : llvm::reverse(Parents)) {
-    // ... Append the letter "C" to the sequence...
-    addULEB128('C');
-
-    // ... Followed by the DWARF tag of the construct...
-    addULEB128(Die->getTag());
-
-    // ... Then the name, taken from the DW_AT_name attribute.
-    StringRef Name = getDIEStringAttr(*Die, dwarf::DW_AT_name);
-    LLVM_DEBUG(dbgs() << "... adding context: " << Name << "\n");
-    if (!Name.empty())
-      addString(Name);
-  }
-}
-
-// Collect all of the attributes for a particular DIE in single structure.
-void DIEHash::collectAttributes(const DIE &Die, DIEAttrs &Attrs) {
-
-  for (const auto &V : Die.values()) {
-    LLVM_DEBUG(dbgs() << "Attribute: "
-                      << dwarf::AttributeString(V.getAttribute())
-                      << " added.\n");
-    switch (V.getAttribute()) {
-#define HANDLE_DIE_HASH_ATTR(NAME)                                             \
-  case dwarf::NAME:                                                            \
-    Attrs.NAME = V;                                                            \
-    break;
-#include "DIEHashAttributes.def"
-    default:
-      break;
-    }
-  }
-}
-
-void DIEHash::hashShallowTypeReference(dwarf::Attribute Attribute,
-                                       const DIE &Entry, StringRef Name) {
-  // append the letter 'N'
-  addULEB128('N');
-
-  // the DWARF attribute code (DW_AT_type or DW_AT_friend),
-  addULEB128(Attribute);
-
-  // the context of the tag,
-  if (const DIE *Parent = Entry.getParent())
-    addParentContext(*Parent);
-
-  // the letter 'E',
-  addULEB128('E');
-
-  // and the name of the type.
-  addString(Name);
-
-  // Currently DW_TAG_friends are not used by Clang, but if they do become so,
-  // here's the relevant spec text to implement:
-  //
-  // For DW_TAG_friend, if the referenced entry is the DW_TAG_subprogram,
-  // the context is omitted and the name to be used is the ABI-specific name
-  // of the subprogram (e.g., the mangled linker name).
-}
-
-void DIEHash::hashRepeatedTypeReference(dwarf::Attribute Attribute,
-                                        unsigned DieNumber) {
-  // a) If T is in the list of [previously hashed types], use the letter
-  // 'R' as the marker
-  addULEB128('R');
-
-  addULEB128(Attribute);
-
-  // and use the unsigned LEB128 encoding of [the index of T in the
-  // list] as the attribute value;
-  addULEB128(DieNumber);
-}
-
-void DIEHash::hashDIEEntry(dwarf::Attribute Attribute, dwarf::Tag Tag,
-                           const DIE &Entry) {
-  assert(Tag != dwarf::DW_TAG_friend && "No current LLVM clients emit friend "
-                                        "tags. Add support here when there's "
-                                        "a use case");
-  // Step 5
-  // If the tag in Step 3 is one of [the below tags]
-  if ((Tag == dwarf::DW_TAG_pointer_type ||
-       Tag == dwarf::DW_TAG_reference_type ||
-       Tag == dwarf::DW_TAG_rvalue_reference_type ||
-       Tag == dwarf::DW_TAG_ptr_to_member_type) &&
-      // and the referenced type (via the [below attributes])
-      // FIXME: This seems overly restrictive, and causes hash mismatches
-      // there's a decl/def difference in the containing type of a
-      // ptr_to_member_type, but it's what DWARF says, for some reason.
-      Attribute == dwarf::DW_AT_type) {
-    // ... has a DW_AT_name attribute,
-    StringRef Name = getDIEStringAttr(Entry, dwarf::DW_AT_name);
-    if (!Name.empty()) {
-      hashShallowTypeReference(Attribute, Entry, Name);
-      return;
-    }
-  }
-
-  unsigned &DieNumber = Numbering[&Entry];
-  if (DieNumber) {
-    hashRepeatedTypeReference(Attribute, DieNumber);
-    return;
-  }
-
-  // otherwise, b) use the letter 'T' as the marker, ...
-  addULEB128('T');
-
-  addULEB128(Attribute);
-
-  // ... process the type T recursively by performing Steps 2 through 7, and
-  // use the result as the attribute value.
-  DieNumber = Numbering.size();
-  computeHash(Entry);
-}
-
-void DIEHash::hashRawTypeReference(const DIE &Entry) {
-  unsigned &DieNumber = Numbering[&Entry];
-  if (DieNumber) {
-    addULEB128('R');
-    addULEB128(DieNumber);
-    return;
-  }
-  DieNumber = Numbering.size();
-  addULEB128('T');
-  computeHash(Entry);
-}
-
-// Hash all of the values in a block like set of values. This assumes that
-// all of the data is going to be added as integers.
-void DIEHash::hashBlockData(const DIE::const_value_range &Values) {
-  for (const auto &V : Values)
-    if (V.getType() == DIEValue::isBaseTypeRef) {
-      const DIE &C =
-          *CU->ExprRefedBaseTypes[V.getDIEBaseTypeRef().getIndex()].Die;
-      StringRef Name = getDIEStringAttr(C, dwarf::DW_AT_name);
-      assert(!Name.empty() &&
-             "Base types referenced from DW_OP_convert should have a name");
-      hashNestedType(C, Name);
-    } else
-      Hash.update((uint64_t)V.getDIEInteger().getValue());
-}
-
-// Hash the contents of a loclistptr class.
-void DIEHash::hashLocList(const DIELocList &LocList) {
-  HashingByteStreamer Streamer(*this);
-  DwarfDebug &DD = *AP->getDwarfDebug();
-  const DebugLocStream &Locs = DD.getDebugLocs();
-  const DebugLocStream::List &List = Locs.getList(LocList.getValue());
-  for (const DebugLocStream::Entry &Entry : Locs.getEntries(List))
-    DD.emitDebugLocEntry(Streamer, Entry, List.CU);
-}
-
-// Hash an individual attribute \param Attr based on the type of attribute and
-// the form.
-void DIEHash::hashAttribute(const DIEValue &Value, dwarf::Tag Tag) {
-  dwarf::Attribute Attribute = Value.getAttribute();
-
-  // Other attribute values use the letter 'A' as the marker, and the value
-  // consists of the form code (encoded as an unsigned LEB128 value) followed by
-  // the encoding of the value according to the form code. To ensure
-  // reproducibility of the signature, the set of forms used in the signature
-  // computation is limited to the following: DW_FORM_sdata, DW_FORM_flag,
-  // DW_FORM_string, and DW_FORM_block.
-
-  switch (Value.getType()) {
-  case DIEValue::isNone:
-    llvm_unreachable("Expected valid DIEValue");
-
-    // 7.27 Step 3
-    // ... An attribute that refers to another type entry T is processed as
-    // follows:
-  case DIEValue::isEntry:
-    hashDIEEntry(Attribute, Tag, Value.getDIEEntry().getEntry());
-    break;
-  case DIEValue::isInteger: {
-    addULEB128('A');
-    addULEB128(Attribute);
-    switch (Value.getForm()) {
-    case dwarf::DW_FORM_data1:
-    case dwarf::DW_FORM_data2:
-    case dwarf::DW_FORM_data4:
-    case dwarf::DW_FORM_data8:
-    case dwarf::DW_FORM_udata:
-    case dwarf::DW_FORM_sdata:
-      addULEB128(dwarf::DW_FORM_sdata);
-      addSLEB128((int64_t)Value.getDIEInteger().getValue());
-      break;
-    // DW_FORM_flag_present is just flag with a value of one. We still give it a
-    // value so just use the value.
-    case dwarf::DW_FORM_flag_present:
-    case dwarf::DW_FORM_flag:
-      addULEB128(dwarf::DW_FORM_flag);
-      addULEB128((int64_t)Value.getDIEInteger().getValue());
-      break;
-    default:
-      llvm_unreachable("Unknown integer form!");
-    }
-    break;
-  }
-  case DIEValue::isString:
-    addULEB128('A');
-    addULEB128(Attribute);
-    addULEB128(dwarf::DW_FORM_string);
-    addString(Value.getDIEString().getString());
-    break;
-  case DIEValue::isInlineString:
-    addULEB128('A');
-    addULEB128(Attribute);
-    addULEB128(dwarf::DW_FORM_string);
-    addString(Value.getDIEInlineString().getString());
-    break;
-  case DIEValue::isBlock:
-  case DIEValue::isLoc:
-  case DIEValue::isLocList:
-    addULEB128('A');
-    addULEB128(Attribute);
-    addULEB128(dwarf::DW_FORM_block);
-    if (Value.getType() == DIEValue::isBlock) {
-      addULEB128(Value.getDIEBlock().computeSize(AP->getDwarfFormParams()));
-      hashBlockData(Value.getDIEBlock().values());
-    } else if (Value.getType() == DIEValue::isLoc) {
-      addULEB128(Value.getDIELoc().computeSize(AP->getDwarfFormParams()));
-      hashBlockData(Value.getDIELoc().values());
-    } else {
-      // We could add the block length, but that would take
-      // a bit of work and not add a lot of uniqueness
-      // to the hash in some way we could test.
-      hashLocList(Value.getDIELocList());
-    }
-    break;
-    // FIXME: It's uncertain whether or not we should handle this at the moment.
-  case DIEValue::isExpr:
-  case DIEValue::isLabel:
-  case DIEValue::isBaseTypeRef:
-  case DIEValue::isDelta:
-  case DIEValue::isAddrOffset:
-    llvm_unreachable("Add support for additional value types.");
-  }
-}
-
-// Go through the attributes from \param Attrs in the order specified in 7.27.4
-// and hash them.
-void DIEHash::hashAttributes(const DIEAttrs &Attrs, dwarf::Tag Tag) {
-#define HANDLE_DIE_HASH_ATTR(NAME)                                             \
-  {                                                                            \
-    if (Attrs.NAME)                                                           \
-      hashAttribute(Attrs.NAME, Tag);                                         \
-  }
-#include "DIEHashAttributes.def"
-  // FIXME: Add the extended attributes.
-}
-
-// Add all of the attributes for \param Die to the hash.
-void DIEHash::addAttributes(const DIE &Die) {
-  DIEAttrs Attrs = {};
-  collectAttributes(Die, Attrs);
-  hashAttributes(Attrs, Die.getTag());
-}
-
-void DIEHash::hashNestedType(const DIE &Die, StringRef Name) {
-  // 7.27 Step 7
-  // ... append the letter 'S',
-  addULEB128('S');
-
-  // the tag of C,
-  addULEB128(Die.getTag());
-
-  // and the name.
-  addString(Name);
-}
-
-// Compute the hash of a DIE. This is based on the type signature computation
-// given in section 7.27 of the DWARF4 standard. It is the md5 hash of a
-// flattened description of the DIE.
-void DIEHash::computeHash(const DIE &Die) {
-  // Append the letter 'D', followed by the DWARF tag of the DIE.
-  addULEB128('D');
-  addULEB128(Die.getTag());
-
-  // Add each of the attributes of the DIE.
-  addAttributes(Die);
-
-  // Then hash each of the children of the DIE.
-  for (auto &C : Die.children()) {
-    // 7.27 Step 7
-    // If C is a nested type entry or a member function entry, ...
-    if (isType(C.getTag()) || (C.getTag() == dwarf::DW_TAG_subprogram && isType(C.getParent()->getTag()))) {
-      StringRef Name = getDIEStringAttr(C, dwarf::DW_AT_name);
-      // ... and has a DW_AT_name attribute
-      if (!Name.empty()) {
-        hashNestedType(C, Name);
-        continue;
-      }
-    }
-    computeHash(C);
-  }
-
-  // Following the last (or if there are no children), append a zero byte.
-  Hash.update(makeArrayRef((uint8_t)'\0'));
-}
-
-/// This is based on the type signature computation given in section 7.27 of the
-/// DWARF4 standard. It is an md5 hash of the flattened description of the DIE
-/// with the inclusion of the full CU and all top level CU entities.
-// TODO: Initialize the type chain at 0 instead of 1 for CU signatures.
-uint64_t DIEHash::computeCUSignature(StringRef DWOName, const DIE &Die) {
-  Numbering.clear();
-  Numbering[&Die] = 1;
-
-  if (!DWOName.empty())
-    Hash.update(DWOName);
-  // Hash the DIE.
-  computeHash(Die);
-
-  // Now return the result.
-  MD5::MD5Result Result;
-  Hash.final(Result);
-
-  // ... take the least significant 8 bytes and return those. Our MD5
-  // implementation always returns its results in little endian, so we actually
-  // need the "high" word.
-  return Result.high();
-}
-
-/// This is based on the type signature computation given in section 7.27 of the
-/// DWARF4 standard. It is an md5 hash of the flattened description of the DIE
-/// with the inclusion of additional forms not specifically called out in the
-/// standard.
-uint64_t DIEHash::computeTypeSignature(const DIE &Die) {
-  Numbering.clear();
-  Numbering[&Die] = 1;
-
-  if (const DIE *Parent = Die.getParent())
-    addParentContext(*Parent);
-
-  // Hash the DIE.
-  computeHash(Die);
-
-  // Now return the result.
-  MD5::MD5Result Result;
-  Hash.final(Result);
-
-  // ... take the least significant 8 bytes and return those. Our MD5
-  // implementation always returns its results in little endian, so we actually
-  // need the "high" word.
-  return Result.high();
-}