Bitcoder nonopaque

.clang-tidy

@@ -1,4 +1,16 @@
-Checks: '-*,clang-diagnostic-*,llvm-*,misc-*,-misc-const-correctness,-misc-unused-parameters,-misc-non-private-member-variables-in-classes,-misc-no-recursion,-misc-use-anonymous-namespace,readability-identifier-naming,-misc-include-cleaner'
+Checks: >
+  -*,
+  clang-diagnostic-*,
+  llvm-*,
+  misc-*,
+  -misc-const-correctness,
+  -misc-include-cleaner,
+  -misc-no-recursion,
+  -misc-non-private-member-variables-in-classes,
+  -misc-unused-parameters,
+  -misc-use-anonymous-namespace,
+  readability-identifier-naming
+
 CheckOptions:
   - key:             readability-identifier-naming.ClassCase
     value:           CamelCase

.github/workflows/containers/github-action-ci/Dockerfile

@@ -2,7 +2,7 @@ FROM docker.io/library/ubuntu:24.04 as base
 ENV LLVM_SYSROOT=/opt/llvm
 
 FROM base as stage1-toolchain
-ENV LLVM_VERSION=20.1.4
+ENV LLVM_VERSION=20.1.8
 
 RUN apt-get update && \
     apt-get install -y \

.github/workflows/libcxx-build-and-test.yaml

@@ -36,8 +36,7 @@ concurrency:
 jobs:
   stage1:
     if: github.repository_owner == 'llvm'
-    runs-on: libcxx-self-hosted-linux
-    container: ghcr.io/llvm/libcxx-linux-builder:b060022103f551d8ca1dad84122ef73927c86512
+    runs-on: llvm-premerge-libcxx-runners
     continue-on-error: false
     strategy:
       fail-fast: false
@@ -74,8 +73,7 @@ jobs:
             **/crash_diagnostics/*
   stage2:
     if: github.repository_owner == 'llvm'
-    runs-on: libcxx-self-hosted-linux
-    container: ghcr.io/llvm/libcxx-linux-builder:2b57ebb50b6d418e70382e655feaa619b558e254
+    runs-on: llvm-premerge-libcxx-runners
     needs: [ stage1 ]
     continue-on-error: false
     strategy:
@@ -149,21 +147,20 @@ jobs:
           'generic-static',
           'bootstrapping-build'
         ]
-        machine: [ 'libcxx-self-hosted-linux' ]
+        machine: [ 'llvm-premerge-libcxx-runners' ]
         include:
         - config: 'generic-cxx26'
-          machine: libcxx-self-hosted-linux
+          machine: llvm-premerge-libcxx-runners
         - config: 'generic-asan'
-          machine: libcxx-self-hosted-linux
+          machine: llvm-premerge-libcxx-runners
         - config: 'generic-tsan'
-          machine: libcxx-self-hosted-linux
+          machine: llvm-premerge-libcxx-runners
         - config: 'generic-ubsan'
-          machine: libcxx-self-hosted-linux
+          machine: llvm-premerge-libcxx-runners
         # Use a larger machine for MSAN to avoid timeout and memory allocation issues.
         - config: 'generic-msan'
-          machine: libcxx-self-hosted-linux
+          machine: llvm-premerge-libcxx-runners
     runs-on: ${{ matrix.machine }}
-    container: ghcr.io/llvm/libcxx-linux-builder:2b57ebb50b6d418e70382e655feaa619b558e254
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: ${{ matrix.config }}

.github/workflows/pr-code-format.yml

@@ -55,7 +55,7 @@ jobs:
       - name: Install clang-format
         uses: aminya/setup-cpp@17c11551771948abc5752bbf3183482567c7caf0 # v1.1.1
         with:
-          clangformat: 20.1.5
+          clangformat: 20.1.8
 
       - name: Setup Python env
         uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0

.github/workflows/premerge.yaml

@@ -63,6 +63,7 @@ jobs:
 
           ./.ci/monolithic-linux.sh "${projects_to_build}" "${project_check_targets}" "${runtimes_to_build}" "${runtimes_check_targets}" "${runtimes_check_targets_needs_reconfig}"
       - name: Upload Artifacts
+        if: '!cancelled()'
         uses: actions/upload-artifact@65c4c4a1ddee5b72f698fdd19549f0f0fb45cf08 # v4.6.0
         with:
           name: Premerge Artifacts (Linux)
@@ -113,6 +114,7 @@ jobs:
           call C:\\BuildTools\\Common7\\Tools\\VsDevCmd.bat -arch=amd64 -host_arch=amd64
           bash .ci/monolithic-windows.sh "${{ steps.vars.outputs.windows-projects }}" "${{ steps.vars.outputs.windows-check-targets }}"
       - name: Upload Artifacts
+        if: '!cancelled()'
         uses: actions/upload-artifact@65c4c4a1ddee5b72f698fdd19549f0f0fb45cf08 # v4.6.0
         with:
           name: Premerge Artifacts (Windows)

clang-tools-extra/clang-doc/BitcodeReader.cpp

@@ -180,6 +180,8 @@ static llvm::Error parseRecord(const Record &R, unsigned ID,
     return decodeRecord(R, I->TagType, Blob);
   case RECORD_IS_TYPE_DEF:
     return decodeRecord(R, I->IsTypeDef, Blob);
+  case RECORD_MANGLED_NAME:
+    return decodeRecord(R, I->MangledName, Blob);
   default:
     return llvm::createStringError(llvm::inconvertibleErrorCode(),
                                    "invalid field for RecordInfo");

clang-tools-extra/clang-doc/BitcodeWriter.cpp

@@ -189,6 +189,7 @@ static const llvm::IndexedMap<RecordIdDsc, RecordIdToIndexFunctor>
           {RECORD_LOCATION, {"Location", &genLocationAbbrev}},
           {RECORD_TAG_TYPE, {"TagType", &genIntAbbrev}},
           {RECORD_IS_TYPE_DEF, {"IsTypeDef", &genBoolAbbrev}},
+          {RECORD_MANGLED_NAME, {"MangledName", &genStringAbbrev}},
           {BASE_RECORD_USR, {"USR", &genSymbolIdAbbrev}},
           {BASE_RECORD_NAME, {"Name", &genStringAbbrev}},
           {BASE_RECORD_PATH, {"Path", &genStringAbbrev}},
@@ -271,7 +272,8 @@ static const std::vector<std::pair<BlockId, std::vector<RecordId>>>
         // Record Block
         {BI_RECORD_BLOCK_ID,
          {RECORD_USR, RECORD_NAME, RECORD_PATH, RECORD_DEFLOCATION,
-          RECORD_LOCATION, RECORD_TAG_TYPE, RECORD_IS_TYPE_DEF}},
+          RECORD_LOCATION, RECORD_TAG_TYPE, RECORD_IS_TYPE_DEF,
+          RECORD_MANGLED_NAME}},
         // BaseRecord Block
         {BI_BASE_RECORD_BLOCK_ID,
          {BASE_RECORD_USR, BASE_RECORD_NAME, BASE_RECORD_PATH,
@@ -616,6 +618,7 @@ void ClangDocBitcodeWriter::emitBlock(const RecordInfo &I) {
   emitRecord(I.USR, RECORD_USR);
   emitRecord(I.Name, RECORD_NAME);
   emitRecord(I.Path, RECORD_PATH);
+  emitRecord(I.MangledName, RECORD_MANGLED_NAME);
   for (const auto &N : I.Namespace)
     emitBlock(N, FieldId::F_namespace);
   for (const auto &CI : I.Description)

clang-tools-extra/clang-doc/BitcodeWriter.h

@@ -126,6 +126,7 @@ enum RecordId {
   RECORD_LOCATION,
   RECORD_TAG_TYPE,
   RECORD_IS_TYPE_DEF,
+  RECORD_MANGLED_NAME,
   BASE_RECORD_USR,
   BASE_RECORD_NAME,
   BASE_RECORD_PATH,

clang-tools-extra/clang-doc/JSONGenerator.cpp

@@ -386,6 +386,7 @@ static void serializeInfo(const RecordInfo &I, json::Object &Obj,
   Obj["FullName"] = I.FullName;
   Obj["TagType"] = getTagType(I.TagType);
   Obj["IsTypedef"] = I.IsTypeDef;
+  Obj["MangledName"] = I.MangledName;
 
   if (!I.Children.Functions.empty()) {
     json::Value PubFunctionsArray = Array();
@@ -491,6 +492,23 @@ static void serializeInfo(const NamespaceInfo &I, json::Object &Obj,
   serializeCommonChildren(I.Children, Obj, RepositoryUrl);
 }
 
+static SmallString<16> determineFileName(Info *I, SmallString<128> &Path) {
+  SmallString<16> FileName;
+  if (I->IT == InfoType::IT_record) {
+    auto *RecordSymbolInfo = static_cast<SymbolInfo *>(I);
+    if (RecordSymbolInfo->MangledName.size() < 255)
+      FileName = RecordSymbolInfo->MangledName;
+    else
+      FileName = toStringRef(toHex(RecordSymbolInfo->USR));
+  } else if (I->IT == InfoType::IT_namespace && I->Name != "")
+    // Serialize the global namespace as index.json
+    FileName = I->Name;
+  else
+    FileName = I->getFileBaseName();
+  sys::path::append(Path, FileName + ".json");
+  return FileName;
+}
+
 Error JSONGenerator::generateDocs(
     StringRef RootDir, llvm::StringMap<std::unique_ptr<doc::Info>> Infos,
     const ClangDocContext &CDCtx) {
@@ -501,15 +519,14 @@ Error JSONGenerator::generateDocs(
 
     SmallString<128> Path;
     sys::path::native(RootDir, Path);
-    sys::path::append(Path, Info->getRelativeFilePath(""));
     if (!CreatedDirs.contains(Path)) {
       if (std::error_code Err = sys::fs::create_directories(Path);
           Err != std::error_code())
         return createFileError(Twine(Path), Err);
       CreatedDirs.insert(Path);
     }
 
-    sys::path::append(Path, Info->getFileBaseName() + ".json");
+    SmallString<16> FileName = determineFileName(Info, Path);
     FileToInfos[Path].push_back(Info);
   }
 

clang-tools-extra/clang-doc/Representation.cpp

@@ -290,6 +290,8 @@ void SymbolInfo::merge(SymbolInfo &&Other) {
   auto *Last = llvm::unique(Loc);
   Loc.erase(Last, Loc.end());
   mergeBase(std::move(Other));
+  if (MangledName.empty())
+    MangledName = std::move(Other.MangledName);
 }
 
 NamespaceInfo::NamespaceInfo(SymbolID USR, StringRef Name, StringRef Path)

clang-tools-extra/clang-doc/Representation.h

@@ -377,6 +377,7 @@ struct SymbolInfo : public Info {
 
   std::optional<Location> DefLoc;     // Location where this decl is defined.
   llvm::SmallVector<Location, 2> Loc; // Locations where this decl is declared.
+  SmallString<16> MangledName;
   bool IsStatic = false;
 };
 

clang-tools-extra/clang-doc/Serialize.cpp

@@ -12,6 +12,7 @@
 #include "clang/AST/Attr.h"
 #include "clang/AST/Comment.h"
 #include "clang/AST/DeclFriend.h"
+#include "clang/AST/Mangle.h"
 #include "clang/Index/USRGeneration.h"
 #include "clang/Lex/Lexer.h"
 #include "llvm/ADT/StringExtras.h"
@@ -767,6 +768,17 @@ static void populateSymbolInfo(SymbolInfo &I, const T *D, const FullComment *C,
     I.DefLoc = Loc;
   else
     I.Loc.emplace_back(Loc);
+
+  auto *Mangler = ItaniumMangleContext::create(
+      D->getASTContext(), D->getASTContext().getDiagnostics());
+  std::string MangledName;
+  llvm::raw_string_ostream MangledStream(MangledName);
+  if (auto *CXXD = dyn_cast<CXXRecordDecl>(D))
+    Mangler->mangleCXXVTable(CXXD, MangledStream);
+  else
+    MangledStream << D->getNameAsString();
+  I.MangledName = MangledName;
+  delete Mangler;
 }
 
 static void