Import LLVM 10.0.0 release including clang, lld and lldb.

ok hackroom
tested by plenty

1 files changed, 364 insertions, 0 deletions

diff --git a/gnu/llvm/clang/lib/Tooling/Refactoring/AtomicChange.cpp b/gnu/llvm/clang/lib/Tooling/Refactoring/AtomicChange.cpp
new file mode 100644
index 00000000000..4cf63306d26
--- /dev/null
+++ b/gnu/llvm/clang/lib/Tooling/Refactoring/AtomicChange.cpp
@@ -0,0 +1,364 @@
+//===--- AtomicChange.cpp - AtomicChange implementation -----------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Tooling/Refactoring/AtomicChange.h"
+#include "clang/Tooling/ReplacementsYaml.h"
+#include "llvm/Support/YAMLTraits.h"
+#include <string>
+
+LLVM_YAML_IS_SEQUENCE_VECTOR(clang::tooling::AtomicChange)
+
+namespace {
+/// Helper to (de)serialize an AtomicChange since we don't have direct
+/// access to its data members.
+/// Data members of a normalized AtomicChange can be directly mapped from/to
+/// YAML string.
+struct NormalizedAtomicChange {
+  NormalizedAtomicChange() = default;
+
+  NormalizedAtomicChange(const llvm::yaml::IO &) {}
+
+  // This converts AtomicChange's internal implementation of the replacements
+  // set to a vector of replacements.
+  NormalizedAtomicChange(const llvm::yaml::IO &,
+                         const clang::tooling::AtomicChange &E)
+      : Key(E.getKey()), FilePath(E.getFilePath()), Error(E.getError()),
+        InsertedHeaders(E.getInsertedHeaders()),
+        RemovedHeaders(E.getRemovedHeaders()),
+        Replaces(E.getReplacements().begin(), E.getReplacements().end()) {}
+
+  // This is not expected to be called but needed for template instantiation.
+  clang::tooling::AtomicChange denormalize(const llvm::yaml::IO &) {
+    llvm_unreachable("Do not convert YAML to AtomicChange directly with '>>'. "
+                     "Use AtomicChange::convertFromYAML instead.");
+  }
+  std::string Key;
+  std::string FilePath;
+  std::string Error;
+  std::vector<std::string> InsertedHeaders;
+  std::vector<std::string> RemovedHeaders;
+  std::vector<clang::tooling::Replacement> Replaces;
+};
+} // anonymous namespace
+
+namespace llvm {
+namespace yaml {
+
+/// Specialized MappingTraits to describe how an AtomicChange is
+/// (de)serialized.
+template <> struct MappingTraits<NormalizedAtomicChange> {
+  static void mapping(IO &Io, NormalizedAtomicChange &Doc) {
+    Io.mapRequired("Key", Doc.Key);
+    Io.mapRequired("FilePath", Doc.FilePath);
+    Io.mapRequired("Error", Doc.Error);
+    Io.mapRequired("InsertedHeaders", Doc.InsertedHeaders);
+    Io.mapRequired("RemovedHeaders", Doc.RemovedHeaders);
+    Io.mapRequired("Replacements", Doc.Replaces);
+  }
+};
+
+/// Specialized MappingTraits to describe how an AtomicChange is
+/// (de)serialized.
+template <> struct MappingTraits<clang::tooling::AtomicChange> {
+  static void mapping(IO &Io, clang::tooling::AtomicChange &Doc) {
+    MappingNormalization<NormalizedAtomicChange, clang::tooling::AtomicChange>
+        Keys(Io, Doc);
+    Io.mapRequired("Key", Keys->Key);
+    Io.mapRequired("FilePath", Keys->FilePath);
+    Io.mapRequired("Error", Keys->Error);
+    Io.mapRequired("InsertedHeaders", Keys->InsertedHeaders);
+    Io.mapRequired("RemovedHeaders", Keys->RemovedHeaders);
+    Io.mapRequired("Replacements", Keys->Replaces);
+  }
+};
+
+} // end namespace yaml
+} // end namespace llvm
+
+namespace clang {
+namespace tooling {
+namespace {
+
+// Returns true if there is any line that violates \p ColumnLimit in range
+// [Start, End].
+bool violatesColumnLimit(llvm::StringRef Code, unsigned ColumnLimit,
+                         unsigned Start, unsigned End) {
+  auto StartPos = Code.rfind('\n', Start);
+  StartPos = (StartPos == llvm::StringRef::npos) ? 0 : StartPos + 1;
+
+  auto EndPos = Code.find("\n", End);
+  if (EndPos == llvm::StringRef::npos)
+    EndPos = Code.size();
+
+  llvm::SmallVector<llvm::StringRef, 8> Lines;
+  Code.substr(StartPos, EndPos - StartPos).split(Lines, '\n');
+  for (llvm::StringRef Line : Lines)
+    if (Line.size() > ColumnLimit)
+      return true;
+  return false;
+}
+
+std::vector<Range>
+getRangesForFormating(llvm::StringRef Code, unsigned ColumnLimit,
+                      ApplyChangesSpec::FormatOption Format,
+                      const clang::tooling::Replacements &Replaces) {
+  // kNone suppresses formatting entirely.
+  if (Format == ApplyChangesSpec::kNone)
+    return {};
+  std::vector<clang::tooling::Range> Ranges;
+  // This works assuming that replacements are ordered by offset.
+  // FIXME: use `getAffectedRanges()` to calculate when it does not include '\n'
+  // at the end of an insertion in affected ranges.
+  int Offset = 0;
+  for (const clang::tooling::Replacement &R : Replaces) {
+    int Start = R.getOffset() + Offset;
+    int End = Start + R.getReplacementText().size();
+    if (!R.getReplacementText().empty() &&
+        R.getReplacementText().back() == '\n' && R.getLength() == 0 &&
+        R.getOffset() > 0 && R.getOffset() <= Code.size() &&
+        Code[R.getOffset() - 1] == '\n')
+      // If we are inserting at the start of a line and the replacement ends in
+      // a newline, we don't need to format the subsequent line.
+      --End;
+    Offset += R.getReplacementText().size() - R.getLength();
+
+    if (Format == ApplyChangesSpec::kAll ||
+        violatesColumnLimit(Code, ColumnLimit, Start, End))
+      Ranges.emplace_back(Start, End - Start);
+  }
+  return Ranges;
+}
+
+inline llvm::Error make_string_error(const llvm::Twine &Message) {
+  return llvm::make_error<llvm::StringError>(Message,
+                                             llvm::inconvertibleErrorCode());
+}
+
+// Creates replacements for inserting/deleting #include headers.
+llvm::Expected<Replacements>
+createReplacementsForHeaders(llvm::StringRef FilePath, llvm::StringRef Code,
+                             llvm::ArrayRef<AtomicChange> Changes,
+                             const format::FormatStyle &Style) {
+  // Create header insertion/deletion replacements to be cleaned up
+  // (i.e. converted to real insertion/deletion replacements).
+  Replacements HeaderReplacements;
+  for (const auto &Change : Changes) {
+    for (llvm::StringRef Header : Change.getInsertedHeaders()) {
+      std::string EscapedHeader =
+          Header.startswith("<") || Header.startswith("\"")
+              ? Header.str()
+              : ("\"" + Header + "\"").str();
+      std::string ReplacementText = "#include " + EscapedHeader;
+      // Offset UINT_MAX and length 0 indicate that the replacement is a header
+      // insertion.
+      llvm::Error Err = HeaderReplacements.add(
+          tooling::Replacement(FilePath, UINT_MAX, 0, ReplacementText));
+      if (Err)
+        return std::move(Err);
+    }
+    for (const std::string &Header : Change.getRemovedHeaders()) {
+      // Offset UINT_MAX and length 1 indicate that the replacement is a header
+      // deletion.
+      llvm::Error Err =
+          HeaderReplacements.add(Replacement(FilePath, UINT_MAX, 1, Header));
+      if (Err)
+        return std::move(Err);
+    }
+  }
+
+  // cleanupAroundReplacements() converts header insertions/deletions into
+  // actual replacements that add/remove headers at the right location.
+  return clang::format::cleanupAroundReplacements(Code, HeaderReplacements,
+                                                  Style);
+}
+
+// Combine replacements in all Changes as a `Replacements`. This ignores the
+// file path in all replacements and replaces them with \p FilePath.
+llvm::Expected<Replacements>
+combineReplacementsInChanges(llvm::StringRef FilePath,
+                             llvm::ArrayRef<AtomicChange> Changes) {
+  Replacements Replaces;
+  for (const auto &Change : Changes)
+    for (const auto &R : Change.getReplacements())
+      if (auto Err = Replaces.add(Replacement(
+              FilePath, R.getOffset(), R.getLength(), R.getReplacementText())))
+        return std::move(Err);
+  return Replaces;
+}
+
+} // end namespace
+
+AtomicChange::AtomicChange(const SourceManager &SM,
+                           SourceLocation KeyPosition) {
+  const FullSourceLoc FullKeyPosition(KeyPosition, SM);
+  std::pair<FileID, unsigned> FileIDAndOffset =
+      FullKeyPosition.getSpellingLoc().getDecomposedLoc();
+  const FileEntry *FE = SM.getFileEntryForID(FileIDAndOffset.first);
+  assert(FE && "Cannot create AtomicChange with invalid location.");
+  FilePath = FE->getName();
+  Key = FilePath + ":" + std::to_string(FileIDAndOffset.second);
+}
+
+AtomicChange::AtomicChange(std::string Key, std::string FilePath,
+                           std::string Error,
+                           std::vector<std::string> InsertedHeaders,
+                           std::vector<std::string> RemovedHeaders,
+                           clang::tooling::Replacements Replaces)
+    : Key(std::move(Key)), FilePath(std::move(FilePath)),
+      Error(std::move(Error)), InsertedHeaders(std::move(InsertedHeaders)),
+      RemovedHeaders(std::move(RemovedHeaders)), Replaces(std::move(Replaces)) {
+}
+
+bool AtomicChange::operator==(const AtomicChange &Other) const {
+  if (Key != Other.Key || FilePath != Other.FilePath || Error != Other.Error)
+    return false;
+  if (!(Replaces == Other.Replaces))
+    return false;
+  // FXIME: Compare header insertions/removals.
+  return true;
+}
+
+std::string AtomicChange::toYAMLString() {
+  std::string YamlContent;
+  llvm::raw_string_ostream YamlContentStream(YamlContent);
+
+  llvm::yaml::Output YAML(YamlContentStream);
+  YAML << *this;
+  YamlContentStream.flush();
+  return YamlContent;
+}
+
+AtomicChange AtomicChange::convertFromYAML(llvm::StringRef YAMLContent) {
+  NormalizedAtomicChange NE;
+  llvm::yaml::Input YAML(YAMLContent);
+  YAML >> NE;
+  AtomicChange E(NE.Key, NE.FilePath, NE.Error, NE.InsertedHeaders,
+                 NE.RemovedHeaders, tooling::Replacements());
+  for (const auto &R : NE.Replaces) {
+    llvm::Error Err = E.Replaces.add(R);
+    if (Err)
+      llvm_unreachable(
+          "Failed to add replacement when Converting YAML to AtomicChange.");
+    llvm::consumeError(std::move(Err));
+  }
+  return E;
+}
+
+llvm::Error AtomicChange::replace(const SourceManager &SM,
+                                  const CharSourceRange &Range,
+                                  llvm::StringRef ReplacementText) {
+  return Replaces.add(Replacement(SM, Range, ReplacementText));
+}
+
+llvm::Error AtomicChange::replace(const SourceManager &SM, SourceLocation Loc,
+                                  unsigned Length, llvm::StringRef Text) {
+  return Replaces.add(Replacement(SM, Loc, Length, Text));
+}
+
+llvm::Error AtomicChange::insert(const SourceManager &SM, SourceLocation Loc,
+                                 llvm::StringRef Text, bool InsertAfter) {
+  if (Text.empty())
+    return llvm::Error::success();
+  Replacement R(SM, Loc, 0, Text);
+  llvm::Error Err = Replaces.add(R);
+  if (Err) {
+    return llvm::handleErrors(
+        std::move(Err), [&](const ReplacementError &RE) -> llvm::Error {
+          if (RE.get() != replacement_error::insert_conflict)
+            return llvm::make_error<ReplacementError>(RE);
+          unsigned NewOffset = Replaces.getShiftedCodePosition(R.getOffset());
+          if (!InsertAfter)
+            NewOffset -=
+                RE.getExistingReplacement()->getReplacementText().size();
+          Replacement NewR(R.getFilePath(), NewOffset, 0, Text);
+          Replaces = Replaces.merge(Replacements(NewR));
+          return llvm::Error::success();
+        });
+  }
+  return llvm::Error::success();
+}
+
+void AtomicChange::addHeader(llvm::StringRef Header) {
+  InsertedHeaders.push_back(Header);
+}
+
+void AtomicChange::removeHeader(llvm::StringRef Header) {
+  RemovedHeaders.push_back(Header);
+}
+
+llvm::Expected<std::string>
+applyAtomicChanges(llvm::StringRef FilePath, llvm::StringRef Code,
+                   llvm::ArrayRef<AtomicChange> Changes,
+                   const ApplyChangesSpec &Spec) {
+  llvm::Expected<Replacements> HeaderReplacements =
+      createReplacementsForHeaders(FilePath, Code, Changes, Spec.Style);
+  if (!HeaderReplacements)
+    return make_string_error(
+        "Failed to create replacements for header changes: " +
+        llvm::toString(HeaderReplacements.takeError()));
+
+  llvm::Expected<Replacements> Replaces =
+      combineReplacementsInChanges(FilePath, Changes);
+  if (!Replaces)
+    return make_string_error("Failed to combine replacements in all changes: " +
+                             llvm::toString(Replaces.takeError()));
+
+  Replacements AllReplaces = std::move(*Replaces);
+  for (const auto &R : *HeaderReplacements) {
+    llvm::Error Err = AllReplaces.add(R);
+    if (Err)
+      return make_string_error(
+          "Failed to combine existing replacements with header replacements: " +
+          llvm::toString(std::move(Err)));
+  }
+
+  if (Spec.Cleanup) {
+    llvm::Expected<Replacements> CleanReplaces =
+        format::cleanupAroundReplacements(Code, AllReplaces, Spec.Style);
+    if (!CleanReplaces)
+      return make_string_error("Failed to cleanup around replacements: " +
+                               llvm::toString(CleanReplaces.takeError()));
+    AllReplaces = std::move(*CleanReplaces);
+  }
+
+  // Apply all replacements.
+  llvm::Expected<std::string> ChangedCode =
+      applyAllReplacements(Code, AllReplaces);
+  if (!ChangedCode)
+    return make_string_error("Failed to apply all replacements: " +
+                             llvm::toString(ChangedCode.takeError()));
+
+  // Sort inserted headers. This is done even if other formatting is turned off
+  // as incorrectly sorted headers are always just wrong, it's not a matter of
+  // taste.
+  Replacements HeaderSortingReplacements = format::sortIncludes(
+      Spec.Style, *ChangedCode, AllReplaces.getAffectedRanges(), FilePath);
+  ChangedCode = applyAllReplacements(*ChangedCode, HeaderSortingReplacements);
+  if (!ChangedCode)
+    return make_string_error(
+        "Failed to apply replacements for sorting includes: " +
+        llvm::toString(ChangedCode.takeError()));
+
+  AllReplaces = AllReplaces.merge(HeaderSortingReplacements);
+
+  std::vector<Range> FormatRanges = getRangesForFormating(
+      *ChangedCode, Spec.Style.ColumnLimit, Spec.Format, AllReplaces);
+  if (!FormatRanges.empty()) {
+    Replacements FormatReplacements =
+        format::reformat(Spec.Style, *ChangedCode, FormatRanges, FilePath);
+    ChangedCode = applyAllReplacements(*ChangedCode, FormatReplacements);
+    if (!ChangedCode)
+      return make_string_error(
+          "Failed to apply replacements for formatting changed code: " +
+          llvm::toString(ChangedCode.takeError()));
+  }
+  return ChangedCode;
+}
+
+} // end namespace tooling
+} // end namespace clang