Merge llvm-project release/17.x llvmorg-17.0.1-25-g098e653a5bed

This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
openmp to llvmorg-17.0.1-25-g098e653a5bed.

PR:		273753
MFC after:	1 month

contrib/llvm-project/clang/include/clang/Tooling/DependencyScanning/DependencyScanningFilesystem.h

@@ -215,6 +215,7 @@ class DependencyScanningFilesystemLocalCache {
 public:
   /// Returns entry associated with the filename or nullptr if none is found.
   const CachedFileSystemEntry *findEntryByFilename(StringRef Filename) const {
+    assert(llvm::sys::path::is_absolute_gnu(Filename));
     auto It = Cache.find(Filename);
     return It == Cache.end() ? nullptr : It->getValue();
   }
@@ -224,6 +225,7 @@ class DependencyScanningFilesystemLocalCache {
   const CachedFileSystemEntry &
   insertEntryForFilename(StringRef Filename,
                          const CachedFileSystemEntry &Entry) {
+    assert(llvm::sys::path::is_absolute_gnu(Filename));
     const auto *InsertedEntry = Cache.insert({Filename, &Entry}).first->second;
     assert(InsertedEntry == &Entry && "entry already present");
     return *InsertedEntry;
@@ -282,13 +284,14 @@ class DependencyScanningWorkerFilesystem : public llvm::vfs::ProxyFileSystem {
 public:
   DependencyScanningWorkerFilesystem(
       DependencyScanningFilesystemSharedCache &SharedCache,
-      IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS)
-      : ProxyFileSystem(std::move(FS)), SharedCache(SharedCache) {}
+      IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS);
 
   llvm::ErrorOr<llvm::vfs::Status> status(const Twine &Path) override;
   llvm::ErrorOr<std::unique_ptr<llvm::vfs::File>>
   openFileForRead(const Twine &Path) override;
 
+  std::error_code setCurrentWorkingDirectory(const Twine &Path) override;
+
   /// Returns entry for the given filename.
   ///
   /// Attempts to use the local and shared caches first, then falls back to
@@ -304,8 +307,11 @@ class DependencyScanningWorkerFilesystem : public llvm::vfs::ProxyFileSystem {
   /// For a filename that's not yet associated with any entry in the caches,
   /// uses the underlying filesystem to either look up the entry based in the
   /// shared cache indexed by unique ID, or creates new entry from scratch.
+  /// \p FilenameForLookup will always be an absolute path, and different than
+  /// \p OriginalFilename if \p OriginalFilename is relative.
   llvm::ErrorOr<const CachedFileSystemEntry &>
-  computeAndStoreResult(StringRef Filename);
+  computeAndStoreResult(StringRef OriginalFilename,
+                        StringRef FilenameForLookup);
 
   /// Scan for preprocessor directives for the given entry if necessary and
   /// returns a wrapper object with reference semantics.
@@ -388,6 +394,12 @@ class DependencyScanningWorkerFilesystem : public llvm::vfs::ProxyFileSystem {
   /// The local cache is used by the worker thread to cache file system queries
   /// locally instead of querying the global cache every time.
   DependencyScanningFilesystemLocalCache LocalCache;
+
+  /// The working directory to use for making relative paths absolute before
+  /// using them for cache lookups.
+  llvm::ErrorOr<std::string> WorkingDirForCacheLookup;
+
+  void updateWorkingDirForCacheLookup();
 };
 
 } // end namespace dependencies

contrib/llvm-project/clang/lib/AST/ExprConstant.cpp

@@ -6013,8 +6013,9 @@ const AccessKinds StartLifetimeOfUnionMemberHandler::AccessKind;
 /// operator whose left-hand side might involve a union member access. If it
 /// does, implicitly start the lifetime of any accessed union elements per
 /// C++20 [class.union]5.
-static bool HandleUnionActiveMemberChange(EvalInfo &Info, const Expr *LHSExpr,
-                                          const LValue &LHS) {
+static bool MaybeHandleUnionActiveMemberChange(EvalInfo &Info,
+                                               const Expr *LHSExpr,
+                                               const LValue &LHS) {
   if (LHS.InvalidBase || LHS.Designator.Invalid)
     return false;
 
@@ -6069,8 +6070,14 @@ static bool HandleUnionActiveMemberChange(EvalInfo &Info, const Expr *LHSExpr,
         break;
       // Walk path backwards as we walk up from the base to the derived class.
       for (const CXXBaseSpecifier *Elt : llvm::reverse(ICE->path())) {
+        if (Elt->isVirtual()) {
+          // A class with virtual base classes never has a trivial default
+          // constructor, so S(E) is empty in this case.
+          E = nullptr;
+          break;
+        }
+
         --PathLength;
-        (void)Elt;
         assert(declaresSameEntity(Elt->getType()->getAsCXXRecordDecl(),
                                   LHS.Designator.Entries[PathLength]
                                       .getAsBaseOrMember().getPointer()));
@@ -7748,7 +7755,7 @@ class ExprEvaluatorBase
         // per C++20 [class.union]5.
         if (Info.getLangOpts().CPlusPlus20 && OCE &&
             OCE->getOperator() == OO_Equal && MD->isTrivial() &&
-            !HandleUnionActiveMemberChange(Info, Args[0], ThisVal))
+            !MaybeHandleUnionActiveMemberChange(Info, Args[0], ThisVal))
           return false;
 
         Args = Args.slice(1);
@@ -8621,7 +8628,7 @@ bool LValueExprEvaluator::VisitBinAssign(const BinaryOperator *E) {
     return false;
 
   if (Info.getLangOpts().CPlusPlus20 &&
-      !HandleUnionActiveMemberChange(Info, E->getLHS(), Result))
+      !MaybeHandleUnionActiveMemberChange(Info, E->getLHS(), Result))
     return false;
 
   return handleAssignment(this->Info, E, Result, E->getLHS()->getType(),

contrib/llvm-project/clang/lib/CodeGen/CGCall.cpp

@@ -5487,30 +5487,6 @@ RValue CodeGenFunction::EmitCall(const CGFunctionInfo &CallInfo,
         Attrs.addFnAttribute(getLLVMContext(), llvm::Attribute::AlwaysInline);
   }
 
-  // The await_suspend call performed by co_await is essentially asynchronous
-  // to the execution of the coroutine. Inlining it normally into an unsplit
-  // coroutine can cause miscompilation because the coroutine CFG misrepresents
-  // the true control flow of the program: things that happen in the
-  // await_suspend are not guaranteed to happen prior to the resumption of the
-  // coroutine, and things that happen after the resumption of the coroutine
-  // (including its exit and the potential deallocation of the coroutine frame)
-  // are not guaranteed to happen only after the end of await_suspend.
-  //
-  // The short-term solution to this problem is to mark the call as uninlinable.
-  // But we don't want to do this if the call is known to be trivial, which is
-  // very common.
-  //
-  // The long-term solution may introduce patterns like:
-  //
-  //  call @llvm.coro.await_suspend(ptr %awaiter, ptr %handle,
-  //                                ptr @awaitSuspendFn)
-  //
-  // Then it is much easier to perform the safety analysis in the middle end.
-  // If it is safe to inline the call to awaitSuspend, we can replace it in the
-  // CoroEarly pass. Otherwise we could replace it in the CoroSplit pass.
-  if (inSuspendBlock() && mayCoroHandleEscape())
-    Attrs = Attrs.addFnAttribute(getLLVMContext(), llvm::Attribute::NoInline);
-
   // Disable inlining inside SEH __try blocks.
   if (isSEHTryScope()) {
     Attrs = Attrs.addFnAttribute(getLLVMContext(), llvm::Attribute::NoInline);

contrib/llvm-project/clang/lib/CodeGen/CGCoroutine.cpp

@@ -139,36 +139,6 @@ static bool memberCallExpressionCanThrow(const Expr *E) {
   return true;
 }
 
-/// Return true when the coroutine handle may escape from the await-suspend
-/// (`awaiter.await_suspend(std::coroutine_handle)` expression).
-/// Return false only when the coroutine wouldn't escape in the await-suspend
-/// for sure.
-///
-/// While it is always safe to return true, return falses can bring better
-/// performances.
-///
-/// See https://github.com/llvm/llvm-project/issues/56301 and
-/// https://reviews.llvm.org/D157070 for the example and the full discussion.
-///
-/// FIXME: It will be much better to perform such analysis in the middle end.
-/// See the comments in `CodeGenFunction::EmitCall` for example.
-static bool MayCoroHandleEscape(CoroutineSuspendExpr const &S) {
-  CXXRecordDecl *Awaiter =
-      S.getCommonExpr()->getType().getNonReferenceType()->getAsCXXRecordDecl();
-
-  // Return true conservatively if the awaiter type is not a record type.
-  if (!Awaiter)
-    return true;
-
-  // In case the awaiter type is empty, the suspend wouldn't leak the coroutine
-  // handle.
-  //
-  // TODO: We can improve this by looking into the implementation of
-  // await-suspend and see if the coroutine handle is passed to foreign
-  // functions.
-  return !Awaiter->field_empty();
-}
-
 // Emit suspend expression which roughly looks like:
 //
 //   auto && x = CommonExpr();
@@ -229,11 +199,8 @@ static LValueOrRValue emitSuspendExpression(CodeGenFunction &CGF, CGCoroData &Co
   auto *SaveCall = Builder.CreateCall(CoroSave, {NullPtr});
 
   CGF.CurCoro.InSuspendBlock = true;
-  CGF.CurCoro.MayCoroHandleEscape = MayCoroHandleEscape(S);
   auto *SuspendRet = CGF.EmitScalarExpr(S.getSuspendExpr());
   CGF.CurCoro.InSuspendBlock = false;
-  CGF.CurCoro.MayCoroHandleEscape = false;
-
   if (SuspendRet != nullptr && SuspendRet->getType()->isIntegerTy(1)) {
     // Veto suspension if requested by bool returning await_suspend.
     BasicBlock *RealSuspendBlock =

contrib/llvm-project/clang/lib/CodeGen/CodeGenFunction.h

@@ -334,7 +334,6 @@ class CodeGenFunction : public CodeGenTypeCache {
   struct CGCoroInfo {
     std::unique_ptr<CGCoroData> Data;
     bool InSuspendBlock = false;
-    bool MayCoroHandleEscape = false;
     CGCoroInfo();
     ~CGCoroInfo();
   };
@@ -348,10 +347,6 @@ class CodeGenFunction : public CodeGenTypeCache {
     return isCoroutine() && CurCoro.InSuspendBlock;
   }
 
-  bool mayCoroHandleEscape() const {
-    return isCoroutine() && CurCoro.MayCoroHandleEscape;
-  }
-
   /// CurGD - The GlobalDecl for the current function being compiled.
   GlobalDecl CurGD;
 

contrib/llvm-project/clang/lib/Frontend/TextDiagnostic.cpp

@@ -1160,8 +1160,7 @@ void TextDiagnostic::emitSnippetAndCaret(
   // Find the set of lines to include.
   const unsigned MaxLines = DiagOpts->SnippetLineLimit;
   std::pair<unsigned, unsigned> Lines = {CaretLineNo, CaretLineNo};
-  unsigned DisplayLineNo =
-      Ranges.empty() ? Loc.getPresumedLoc().getLine() : ~0u;
+  unsigned DisplayLineNo = Loc.getPresumedLoc().getLine();
   for (const auto &I : Ranges) {
     if (auto OptionalRange = findLinesForRange(I, FID, SM))
       Lines = maybeAddRange(Lines, *OptionalRange, MaxLines);

contrib/llvm-project/clang/lib/Headers/cuda_wrappers/bits/basic_string.h

@@ -0,0 +1,9 @@
+// CUDA headers define __noinline__ which interferes with libstdc++'s use of
+// `__attribute((__noinline__))`. In order to avoid compilation error,
+// temporarily unset __noinline__ when we include affected libstdc++ header.
+
+#pragma push_macro("__noinline__")
+#undef __noinline__
+#include_next "bits/basic_string.h"
+
+#pragma pop_macro("__noinline__")

contrib/llvm-project/clang/lib/Headers/cuda_wrappers/bits/basic_string.tcc

@@ -0,0 +1,9 @@
+// CUDA headers define __noinline__ which interferes with libstdc++'s use of
+// `__attribute((__noinline__))`. In order to avoid compilation error,
+// temporarily unset __noinline__ when we include affected libstdc++ header.
+
+#pragma push_macro("__noinline__")
+#undef __noinline__
+#include_next "bits/basic_string.tcc"
+
+#pragma pop_macro("__noinline__")

contrib/llvm-project/clang/lib/Sema/SemaChecking.cpp

@@ -11308,7 +11308,11 @@ CheckPrintfHandler::checkFormatExpr(const analyze_printf::PrintfSpecifier &FS,
         Hints.push_back(
             FixItHint::CreateInsertion(E->getBeginLoc(), CastFix.str()));
 
-        SourceLocation After = S.getLocForEndOfToken(E->getEndLoc());
+        // We don't use getLocForEndOfToken because it returns invalid source
+        // locations for macro expansions (by design).
+        SourceLocation EndLoc = S.SourceMgr.getSpellingLoc(E->getEndLoc());
+        SourceLocation After = EndLoc.getLocWithOffset(
+            Lexer::MeasureTokenLength(EndLoc, S.SourceMgr, S.LangOpts));
         Hints.push_back(FixItHint::CreateInsertion(After, ")"));
       }
 

contrib/llvm-project/clang/lib/Tooling/DependencyScanning/DependencyScanningFilesystem.cpp

@@ -96,6 +96,7 @@ DependencyScanningFilesystemSharedCache::
 DependencyScanningFilesystemSharedCache::CacheShard &
 DependencyScanningFilesystemSharedCache::getShardForFilename(
     StringRef Filename) const {
+  assert(llvm::sys::path::is_absolute_gnu(Filename));
   return CacheShards[llvm::hash_value(Filename) % NumShards];
 }
 
@@ -109,6 +110,7 @@ DependencyScanningFilesystemSharedCache::getShardForUID(
 const CachedFileSystemEntry *
 DependencyScanningFilesystemSharedCache::CacheShard::findEntryByFilename(
     StringRef Filename) const {
+  assert(llvm::sys::path::is_absolute_gnu(Filename));
   std::lock_guard<std::mutex> LockGuard(CacheLock);
   auto It = EntriesByFilename.find(Filename);
   return It == EntriesByFilename.end() ? nullptr : It->getValue();
@@ -189,6 +191,14 @@ static bool shouldCacheStatFailures(StringRef Filename) {
   return shouldScanForDirectivesBasedOnExtension(Filename);
 }
 
+DependencyScanningWorkerFilesystem::DependencyScanningWorkerFilesystem(
+    DependencyScanningFilesystemSharedCache &SharedCache,
+    IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS)
+    : ProxyFileSystem(std::move(FS)), SharedCache(SharedCache),
+      WorkingDirForCacheLookup(llvm::errc::invalid_argument) {
+  updateWorkingDirForCacheLookup();
+}
+
 bool DependencyScanningWorkerFilesystem::shouldScanForDirectives(
     StringRef Filename) {
   return shouldScanForDirectivesBasedOnExtension(Filename);
@@ -215,44 +225,62 @@ DependencyScanningWorkerFilesystem::findEntryByFilenameWithWriteThrough(
 }
 
 llvm::ErrorOr<const CachedFileSystemEntry &>
-DependencyScanningWorkerFilesystem::computeAndStoreResult(StringRef Filename) {
-  llvm::ErrorOr<llvm::vfs::Status> Stat = getUnderlyingFS().status(Filename);
+DependencyScanningWorkerFilesystem::computeAndStoreResult(
+    StringRef OriginalFilename, StringRef FilenameForLookup) {
+  llvm::ErrorOr<llvm::vfs::Status> Stat =
+      getUnderlyingFS().status(OriginalFilename);
   if (!Stat) {
-    if (!shouldCacheStatFailures(Filename))
+    if (!shouldCacheStatFailures(OriginalFilename))
       return Stat.getError();
     const auto &Entry =
-        getOrEmplaceSharedEntryForFilename(Filename, Stat.getError());
-    return insertLocalEntryForFilename(Filename, Entry);
+        getOrEmplaceSharedEntryForFilename(FilenameForLookup, Stat.getError());
+    return insertLocalEntryForFilename(FilenameForLookup, Entry);
   }
 
   if (const auto *Entry = findSharedEntryByUID(*Stat))
-    return insertLocalEntryForFilename(Filename, *Entry);
+    return insertLocalEntryForFilename(FilenameForLookup, *Entry);
 
   auto TEntry =
-      Stat->isDirectory() ? TentativeEntry(*Stat) : readFile(Filename);
+      Stat->isDirectory() ? TentativeEntry(*Stat) : readFile(OriginalFilename);
 
   const CachedFileSystemEntry *SharedEntry = [&]() {
     if (TEntry) {
       const auto &UIDEntry = getOrEmplaceSharedEntryForUID(std::move(*TEntry));
-      return &getOrInsertSharedEntryForFilename(Filename, UIDEntry);
+      return &getOrInsertSharedEntryForFilename(FilenameForLookup, UIDEntry);
     }
-    return &getOrEmplaceSharedEntryForFilename(Filename, TEntry.getError());
+    return &getOrEmplaceSharedEntryForFilename(FilenameForLookup,
+                                               TEntry.getError());
   }();
 
-  return insertLocalEntryForFilename(Filename, *SharedEntry);
+  return insertLocalEntryForFilename(FilenameForLookup, *SharedEntry);
 }
 
 llvm::ErrorOr<EntryRef>
 DependencyScanningWorkerFilesystem::getOrCreateFileSystemEntry(
-    StringRef Filename, bool DisableDirectivesScanning) {
-  if (const auto *Entry = findEntryByFilenameWithWriteThrough(Filename))
-    return scanForDirectivesIfNecessary(*Entry, Filename,
+    StringRef OriginalFilename, bool DisableDirectivesScanning) {
+  StringRef FilenameForLookup;
+  SmallString<256> PathBuf;
+  if (llvm::sys::path::is_absolute_gnu(OriginalFilename)) {
+    FilenameForLookup = OriginalFilename;
+  } else if (!WorkingDirForCacheLookup) {
+    return WorkingDirForCacheLookup.getError();
+  } else {
+    StringRef RelFilename = OriginalFilename;
+    RelFilename.consume_front("./");
+    PathBuf = *WorkingDirForCacheLookup;
+    llvm::sys::path::append(PathBuf, RelFilename);
+    FilenameForLookup = PathBuf.str();
+  }
+  assert(llvm::sys::path::is_absolute_gnu(FilenameForLookup));
+  if (const auto *Entry =
+          findEntryByFilenameWithWriteThrough(FilenameForLookup))
+    return scanForDirectivesIfNecessary(*Entry, OriginalFilename,
                                         DisableDirectivesScanning)
         .unwrapError();
-  auto MaybeEntry = computeAndStoreResult(Filename);
+  auto MaybeEntry = computeAndStoreResult(OriginalFilename, FilenameForLookup);
   if (!MaybeEntry)
     return MaybeEntry.getError();
-  return scanForDirectivesIfNecessary(*MaybeEntry, Filename,
+  return scanForDirectivesIfNecessary(*MaybeEntry, OriginalFilename,
                                       DisableDirectivesScanning)
       .unwrapError();
 }
@@ -330,3 +358,24 @@ DependencyScanningWorkerFilesystem::openFileForRead(const Twine &Path) {
     return Result.getError();
   return DepScanFile::create(Result.get());
 }
+
+std::error_code DependencyScanningWorkerFilesystem::setCurrentWorkingDirectory(
+    const Twine &Path) {
+  std::error_code EC = ProxyFileSystem::setCurrentWorkingDirectory(Path);
+  updateWorkingDirForCacheLookup();
+  return EC;
+}
+
+void DependencyScanningWorkerFilesystem::updateWorkingDirForCacheLookup() {
+  llvm::ErrorOr<std::string> CWD =
+      getUnderlyingFS().getCurrentWorkingDirectory();
+  if (!CWD) {
+    WorkingDirForCacheLookup = CWD.getError();
+  } else if (!llvm::sys::path::is_absolute_gnu(*CWD)) {
+    WorkingDirForCacheLookup = llvm::errc::invalid_argument;
+  } else {
+    WorkingDirForCacheLookup = *CWD;
+  }
+  assert(!WorkingDirForCacheLookup ||
+         llvm::sys::path::is_absolute_gnu(*WorkingDirForCacheLookup));
+}

contrib/llvm-project/libcxx/include/__config

@@ -40,7 +40,7 @@
 // _LIBCPP_VERSION represents the version of libc++, which matches the version of LLVM.
 // Given a LLVM release LLVM XX.YY.ZZ (e.g. LLVM 17.0.1 == 17.00.01), _LIBCPP_VERSION is
 // defined to XXYYZZ.
-#  define _LIBCPP_VERSION 170000
+#  define _LIBCPP_VERSION 170002
 
 #  define _LIBCPP_CONCAT_IMPL(_X, _Y) _X##_Y
 #  define _LIBCPP_CONCAT(_X, _Y) _LIBCPP_CONCAT_IMPL(_X, _Y)

contrib/llvm-project/lld/COFF/Writer.cpp

@@ -1796,7 +1796,7 @@ void Writer::createGuardCFTables() {
   // Add the ehcont target table unless the user told us not to.
   if (config->guardCF & GuardCFLevel::EHCont)
     maybeAddRVATable(std::move(ehContTargets), "__guard_eh_cont_table",
-                     "__guard_eh_cont_count", true);
+                     "__guard_eh_cont_count");
 
   // Set __guard_flags, which will be used in the load config to indicate that
   // /guard:cf was enabled.