Merge llvm, clang, compiler-rt, libc++, libunwind, lld, lldb, and openmp

release_90 branch r371301, and update version numbers.

contrib/llvm/include/llvm/Transforms/Vectorize/LoopVectorizationLegality.h

@@ -452,8 +452,8 @@ class LoopVectorizationLegality {
   /// Holds the widest induction type encountered.
   Type *WidestIndTy = nullptr;
 
-  /// Allowed outside users. This holds the induction and reduction
-  /// vars which can be accessed from outside the loop.
+  /// Allowed outside users. This holds the variables that can be accessed from
+  /// outside the loop.
   SmallPtrSet<Value *, 4> AllowedExit;
 
   /// Can we assume the absence of NaNs.

contrib/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp

@@ -1810,7 +1810,7 @@ void SelectionDAGBuilder::visitRet(const ReturnInst &I) {
       // offsets to its parts don't wrap either.
       SDValue Ptr = DAG.getObjectPtrOffset(getCurSDLoc(), RetPtr, Offsets[i]);
 
-      SDValue Val = RetOp.getValue(i);
+      SDValue Val = RetOp.getValue(RetOp.getResNo() + i);
       if (MemVTs[i] != ValueVTs[i])
         Val = DAG.getPtrExtOrTrunc(Val, getCurSDLoc(), MemVTs[i]);
       Chains[i] = DAG.getStore(Chain, getCurSDLoc(), Val,

contrib/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp

@@ -468,7 +468,7 @@ bool SystemZInstrInfo::analyzeBranch(MachineBasicBlock &MBB,
 
     // Can't handle indirect branches.
     SystemZII::Branch Branch(getBranchInfo(*I));
-    if (!Branch.Target->isMBB())
+    if (!Branch.hasMBBTarget())
       return true;
 
     // Punt on compound branches.
@@ -478,7 +478,7 @@ bool SystemZInstrInfo::analyzeBranch(MachineBasicBlock &MBB,
     if (Branch.CCMask == SystemZ::CCMASK_ANY) {
       // Handle unconditional branches.
       if (!AllowModify) {
-        TBB = Branch.Target->getMBB();
+        TBB = Branch.getMBBTarget();
         continue;
       }
 
@@ -490,7 +490,7 @@ bool SystemZInstrInfo::analyzeBranch(MachineBasicBlock &MBB,
       FBB = nullptr;
 
       // Delete the JMP if it's equivalent to a fall-through.
-      if (MBB.isLayoutSuccessor(Branch.Target->getMBB())) {
+      if (MBB.isLayoutSuccessor(Branch.getMBBTarget())) {
         TBB = nullptr;
         I->eraseFromParent();
         I = MBB.end();
@@ -498,7 +498,7 @@ bool SystemZInstrInfo::analyzeBranch(MachineBasicBlock &MBB,
       }
 
       // TBB is used to indicate the unconditinal destination.
-      TBB = Branch.Target->getMBB();
+      TBB = Branch.getMBBTarget();
       continue;
     }
 
@@ -506,7 +506,7 @@ bool SystemZInstrInfo::analyzeBranch(MachineBasicBlock &MBB,
     if (Cond.empty()) {
       // FIXME: add X86-style branch swap
       FBB = TBB;
-      TBB = Branch.Target->getMBB();
+      TBB = Branch.getMBBTarget();
       Cond.push_back(MachineOperand::CreateImm(Branch.CCValid));
       Cond.push_back(MachineOperand::CreateImm(Branch.CCMask));
       continue;
@@ -517,7 +517,7 @@ bool SystemZInstrInfo::analyzeBranch(MachineBasicBlock &MBB,
 
     // Only handle the case where all conditional branches branch to the same
     // destination.
-    if (TBB != Branch.Target->getMBB())
+    if (TBB != Branch.getMBBTarget())
       return true;
 
     // If the conditions are the same, we can leave them alone.
@@ -547,7 +547,7 @@ unsigned SystemZInstrInfo::removeBranch(MachineBasicBlock &MBB,
       continue;
     if (!I->isBranch())
       break;
-    if (!getBranchInfo(*I).Target->isMBB())
+    if (!getBranchInfo(*I).hasMBBTarget())
       break;
     // Remove the branch.
     I->eraseFromParent();
@@ -1545,6 +1545,10 @@ SystemZInstrInfo::getBranchInfo(const MachineInstr &MI) const {
     return SystemZII::Branch(SystemZII::BranchCLG, SystemZ::CCMASK_ICMP,
                              MI.getOperand(2).getImm(), &MI.getOperand(3));
 
+  case SystemZ::INLINEASM_BR:
+    // Don't try to analyze asm goto, so pass nullptr as branch target argument.
+    return SystemZII::Branch(SystemZII::AsmGoto, 0, 0, nullptr);
+
   default:
     llvm_unreachable("Unrecognized branch opcode");
   }

contrib/llvm/lib/Target/SystemZ/SystemZInstrInfo.h

@@ -100,11 +100,18 @@ enum BranchType {
 
   // An instruction that decrements a 64-bit register and branches if
   // the result is nonzero.
-  BranchCTG
+  BranchCTG,
+
+  // An instruction representing an asm goto statement.
+  AsmGoto
 };
 
 // Information about a branch instruction.
-struct Branch {
+class Branch {
+  // The target of the branch. In case of INLINEASM_BR, this is nullptr.
+  const MachineOperand *Target;
+
+public:
   // The type of the branch.
   BranchType Type;
 
@@ -114,12 +121,15 @@ struct Branch {
   // CCMASK_<N> is set if the branch should be taken when CC == N.
   unsigned CCMask;
 
-  // The target of the branch.
-  const MachineOperand *Target;
-
   Branch(BranchType type, unsigned ccValid, unsigned ccMask,
          const MachineOperand *target)
-    : Type(type), CCValid(ccValid), CCMask(ccMask), Target(target) {}
+    : Target(target), Type(type), CCValid(ccValid), CCMask(ccMask) {}
+
+  bool isIndirect() { return Target != nullptr && Target->isReg(); }
+  bool hasMBBTarget() { return Target != nullptr && Target->isMBB(); }
+  MachineBasicBlock *getMBBTarget() {
+    return hasMBBTarget() ? Target->getMBB() : nullptr;
+  }
 };
 
 // Kinds of fused compares in compare-and-* instructions.  Together with type

contrib/llvm/lib/Target/SystemZ/SystemZLongBranch.cpp

@@ -257,7 +257,7 @@ TerminatorInfo SystemZLongBranch::describeTerminator(MachineInstr &MI) {
     }
     Terminator.Branch = &MI;
     Terminator.TargetBlock =
-      TII->getBranchInfo(MI).Target->getMBB()->getNumber();
+      TII->getBranchInfo(MI).getMBBTarget()->getNumber();
   }
   return Terminator;
 }

contrib/llvm/lib/Target/SystemZ/SystemZMachineScheduler.cpp

@@ -108,8 +108,8 @@ void SystemZPostRASchedStrategy::enterMBB(MachineBasicBlock *NextMBB) {
        I != SinglePredMBB->end(); I++) {
     LLVM_DEBUG(dbgs() << "** Emitting incoming branch: "; I->dump(););
     bool TakenBranch = (I->isBranch() &&
-      (TII->getBranchInfo(*I).Target->isReg() || // Relative branch
-       TII->getBranchInfo(*I).Target->getMBB() == MBB));
+                        (TII->getBranchInfo(*I).isIndirect() ||
+                         TII->getBranchInfo(*I).getMBBTarget() == MBB));
     HazardRec->emitInstruction(&*I, TakenBranch);
     if (TakenBranch)
       break;

contrib/llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -33594,7 +33594,7 @@ static SDValue combineShuffleOfConcatUndef(SDNode *N, SelectionDAG &DAG,
 }
 
 /// Eliminate a redundant shuffle of a horizontal math op.
-static SDValue foldShuffleOfHorizOp(SDNode *N) {
+static SDValue foldShuffleOfHorizOp(SDNode *N, SelectionDAG &DAG) {
   unsigned Opcode = N->getOpcode();
   if (Opcode != X86ISD::MOVDDUP && Opcode != X86ISD::VBROADCAST)
     if (Opcode != ISD::VECTOR_SHUFFLE || !N->getOperand(1).isUndef())
@@ -33625,6 +33625,25 @@ static SDValue foldShuffleOfHorizOp(SDNode *N) {
       HOp.getOperand(0) != HOp.getOperand(1))
     return SDValue();
 
+  // The shuffle that we are eliminating may have allowed the horizontal op to
+  // have an undemanded (undefined) operand. Duplicate the other (defined)
+  // operand to ensure that the results are defined across all lanes without the
+  // shuffle.
+  auto updateHOp = [](SDValue HorizOp, SelectionDAG &DAG) {
+    SDValue X;
+    if (HorizOp.getOperand(0).isUndef()) {
+      assert(!HorizOp.getOperand(1).isUndef() && "Not expecting foldable h-op");
+      X = HorizOp.getOperand(1);
+    } else if (HorizOp.getOperand(1).isUndef()) {
+      assert(!HorizOp.getOperand(0).isUndef() && "Not expecting foldable h-op");
+      X = HorizOp.getOperand(0);
+    } else {
+      return HorizOp;
+    }
+    return DAG.getNode(HorizOp.getOpcode(), SDLoc(HorizOp),
+                       HorizOp.getValueType(), X, X);
+  };
+
   // When the operands of a horizontal math op are identical, the low half of
   // the result is the same as the high half. If a target shuffle is also
   // replicating low and high halves, we don't need the shuffle.
@@ -33635,7 +33654,7 @@ static SDValue foldShuffleOfHorizOp(SDNode *N) {
       assert((HOp.getValueType() == MVT::v2f64 ||
         HOp.getValueType() == MVT::v4f64) && HOp.getValueType() == VT &&
         "Unexpected type for h-op");
-      return HOp;
+      return updateHOp(HOp, DAG);
     }
     return SDValue();
   }
@@ -33649,14 +33668,14 @@ static SDValue foldShuffleOfHorizOp(SDNode *N) {
       (isTargetShuffleEquivalent(Mask, {0, 0}) ||
        isTargetShuffleEquivalent(Mask, {0, 1, 0, 1}) ||
        isTargetShuffleEquivalent(Mask, {0, 1, 2, 3, 0, 1, 2, 3})))
-    return HOp;
+    return updateHOp(HOp, DAG);
 
   if (HOp.getValueSizeInBits() == 256 &&
       (isTargetShuffleEquivalent(Mask, {0, 0, 2, 2}) ||
        isTargetShuffleEquivalent(Mask, {0, 1, 0, 1, 4, 5, 4, 5}) ||
        isTargetShuffleEquivalent(
            Mask, {0, 1, 2, 3, 0, 1, 2, 3, 8, 9, 10, 11, 8, 9, 10, 11})))
-    return HOp;
+    return updateHOp(HOp, DAG);
 
   return SDValue();
 }
@@ -33710,7 +33729,7 @@ static SDValue combineShuffle(SDNode *N, SelectionDAG &DAG,
     if (SDValue AddSub = combineShuffleToAddSubOrFMAddSub(N, Subtarget, DAG))
       return AddSub;
 
-    if (SDValue HAddSub = foldShuffleOfHorizOp(N))
+    if (SDValue HAddSub = foldShuffleOfHorizOp(N, DAG))
       return HAddSub;
   }
 

contrib/llvm/lib/Transforms/Vectorize/LoopVectorizationLegality.cpp

@@ -631,6 +631,7 @@ bool LoopVectorizationLegality::canVectorizeInstrs() {
           // Unsafe cyclic dependencies with header phis are identified during
           // legalization for reduction, induction and first order
           // recurrences.
+          AllowedExit.insert(&I);
           continue;
         }
 

contrib/llvm/tools/clang/include/clang/Basic/DiagnosticDriverKinds.td

@@ -91,8 +91,6 @@ def err_no_external_assembler : Error<
   "there is no external assembler that can be used on this platform">;
 def err_drv_unable_to_remove_file : Error<
   "unable to remove file: %0">;
-def err_drv_unable_to_set_working_directory : Error <
-  "unable to set working directory: %0">;
 def err_drv_command_failure : Error<
   "unable to execute command: %0">;
 def err_drv_invalid_darwin_version : Error<

contrib/llvm/tools/clang/lib/AST/ASTContext.cpp

@@ -9814,10 +9814,25 @@ static GVALinkage basicGVALinkageForVariable(const ASTContext &Context,
     return StrongLinkage;
 
   case TSK_ExplicitSpecialization:
-    return Context.getTargetInfo().getCXXABI().isMicrosoft() &&
-                   VD->isStaticDataMember()
-               ? GVA_StrongODR
-               : StrongLinkage;
+    if (Context.getTargetInfo().getCXXABI().isMicrosoft()) {
+      // If this is a fully specialized constexpr variable template, pretend it
+      // was marked inline. MSVC 14.21.27702 headers define _Is_integral in a
+      // header this way, and we don't want to emit non-discardable definitions
+      // of these variables in every TU that includes <type_traits>. This
+      // behavior is non-conforming, since another TU could use an extern
+      // template declaration for this variable, but for constexpr variables,
+      // it's unlikely for a user to want to do that. This behavior can be
+      // removed if the headers change to explicitly mark such variable template
+      // specializations inline.
+      if (isa<VarTemplateSpecializationDecl>(VD) && VD->isConstexpr())
+        return GVA_DiscardableODR;
+
+      // Use ODR linkage for static data members of fully specialized templates
+      // to prevent duplicate definition errors with MSVC.
+      if (VD->isStaticDataMember())
+        return GVA_StrongODR;
+    }
+    return StrongLinkage;
 
   case TSK_ExplicitInstantiationDefinition:
     return GVA_StrongODR;

contrib/llvm/tools/clang/lib/Driver/Driver.cpp

@@ -133,7 +133,7 @@ Driver::Driver(StringRef ClangExecutable, StringRef TargetTriple,
 
   // Provide a sane fallback if no VFS is specified.
   if (!this->VFS)
-    this->VFS = llvm::vfs::createPhysicalFileSystem().release();
+    this->VFS = llvm::vfs::getRealFileSystem();
 
   Name = llvm::sys::path::filename(ClangExecutable);
   Dir = llvm::sys::path::parent_path(ClangExecutable);
@@ -1010,11 +1010,6 @@ Compilation *Driver::BuildCompilation(ArrayRef<const char *> ArgList) {
     }
   }
 
-  // Check for working directory option before accessing any files
-  if (Arg *WD = Args.getLastArg(options::OPT_working_directory))
-    if (VFS->setCurrentWorkingDirectory(WD->getValue()))
-      Diag(diag::err_drv_unable_to_set_working_directory) << WD->getValue();
-
   // FIXME: This stuff needs to go into the Compilation, not the driver.
   bool CCCPrintPhases;
 
@@ -1995,11 +1990,20 @@ bool Driver::DiagnoseInputExistence(const DerivedArgList &Args, StringRef Value,
   if (Value == "-")
     return true;
 
-  if (getVFS().exists(Value))
+  SmallString<64> Path(Value);
+  if (Arg *WorkDir = Args.getLastArg(options::OPT_working_directory)) {
+    if (!llvm::sys::path::is_absolute(Path)) {
+      SmallString<64> Directory(WorkDir->getValue());
+      llvm::sys::path::append(Directory, Value);
+      Path.assign(Directory);
+    }
+  }
+
+  if (getVFS().exists(Path))
     return true;
 
   if (IsCLMode()) {
-    if (!llvm::sys::path::is_absolute(Twine(Value)) &&
+    if (!llvm::sys::path::is_absolute(Twine(Path)) &&
         llvm::sys::Process::FindInEnvPath("LIB", Value))
       return true;
 
@@ -2025,12 +2029,12 @@ bool Driver::DiagnoseInputExistence(const DerivedArgList &Args, StringRef Value,
     if (getOpts().findNearest(Value, Nearest, IncludedFlagsBitmask,
                               ExcludedFlagsBitmask) <= 1) {
       Diag(clang::diag::err_drv_no_such_file_with_suggestion)
-          << Value << Nearest;
+          << Path << Nearest;
       return false;
     }
   }
 
-  Diag(clang::diag::err_drv_no_such_file) << Value;
+  Diag(clang::diag::err_drv_no_such_file) << Path;
   return false;
 }
 

contrib/llvm/tools/clang/lib/Driver/ToolChains/Clang.cpp

@@ -603,15 +603,16 @@ static bool shouldUseLeafFramePointer(const ArgList &Args,
 }
 
 /// Add a CC1 option to specify the debug compilation directory.
-static void addDebugCompDirArg(const ArgList &Args, ArgStringList &CmdArgs,
-                               const llvm::vfs::FileSystem &VFS) {
+static void addDebugCompDirArg(const ArgList &Args, ArgStringList &CmdArgs) {
   if (Arg *A = Args.getLastArg(options::OPT_fdebug_compilation_dir)) {
     CmdArgs.push_back("-fdebug-compilation-dir");
     CmdArgs.push_back(A->getValue());
-  } else if (llvm::ErrorOr<std::string> CWD =
-                 VFS.getCurrentWorkingDirectory()) {
-    CmdArgs.push_back("-fdebug-compilation-dir");
-    CmdArgs.push_back(Args.MakeArgString(*CWD));
+  } else {
+    SmallString<128> cwd;
+    if (!llvm::sys::fs::current_path(cwd)) {
+      CmdArgs.push_back("-fdebug-compilation-dir");
+      CmdArgs.push_back(Args.MakeArgString(cwd));
+    }
   }
 }
 
@@ -877,8 +878,13 @@ static void addPGOAndCoverageFlags(const ToolChain &TC, Compilation &C,
       else
         OutputFilename = llvm::sys::path::filename(Output.getBaseInput());
       SmallString<128> CoverageFilename = OutputFilename;
-      if (llvm::sys::path::is_relative(CoverageFilename))
-        (void)D.getVFS().makeAbsolute(CoverageFilename);
+      if (llvm::sys::path::is_relative(CoverageFilename)) {
+        SmallString<128> Pwd;
+        if (!llvm::sys::fs::current_path(Pwd)) {
+          llvm::sys::path::append(Pwd, CoverageFilename);
+          CoverageFilename.swap(Pwd);
+        }
+      }
       llvm::sys::path::replace_extension(CoverageFilename, "gcno");
       CmdArgs.push_back(Args.MakeArgString(CoverageFilename));
 
@@ -4365,7 +4371,7 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
     CmdArgs.push_back("-fno-autolink");
 
   // Add in -fdebug-compilation-dir if necessary.
-  addDebugCompDirArg(Args, CmdArgs, D.getVFS());
+  addDebugCompDirArg(Args, CmdArgs);
 
   addDebugPrefixMapArg(D, Args, CmdArgs);
 
@@ -6092,7 +6098,7 @@ void ClangAs::ConstructJob(Compilation &C, const JobAction &JA,
     DebugInfoKind = (WantDebug ? codegenoptions::LimitedDebugInfo
                                : codegenoptions::NoDebugInfo);
     // Add the -fdebug-compilation-dir flag if needed.
-    addDebugCompDirArg(Args, CmdArgs, C.getDriver().getVFS());
+    addDebugCompDirArg(Args, CmdArgs);
 
     addDebugPrefixMapArg(getToolChain().getDriver(), Args, CmdArgs);
 

contrib/llvm/tools/clang/lib/StaticAnalyzer/Checkers/EnumCastOutOfRangeChecker.cpp

@@ -91,6 +91,22 @@ void EnumCastOutOfRangeChecker::reportWarning(CheckerContext &C) const {
 
 void EnumCastOutOfRangeChecker::checkPreStmt(const CastExpr *CE,
                                              CheckerContext &C) const {
+
+  // Only perform enum range check on casts where such checks are valid.  For
+  // all other cast kinds (where enum range checks are unnecessary or invalid),
+  // just return immediately.  TODO: The set of casts whitelisted for enum
+  // range checking may be incomplete.  Better to add a missing cast kind to
+  // enable a missing check than to generate false negatives and have to remove
+  // those later.
+  switch (CE->getCastKind()) {
+  case CK_IntegralCast:
+    break;
+
+  default:
+    return;
+    break;
+  }
+
   // Get the value of the expression to cast.
   const llvm::Optional<DefinedOrUnknownSVal> ValueToCast =
       C.getSVal(CE->getSubExpr()).getAs<DefinedOrUnknownSVal>();

contrib/llvm/tools/lld/docs/ReleaseNotes.rst

@@ -8,10 +8,12 @@ lld 9.0.0 Release Notes
 Introduction
 ============
 
-This document contains the release notes for the lld linker, release 9.0.0.
-Here we describe the status of lld, including major improvements
-from the previous release. All lld releases may be downloaded
-from the `LLVM releases web site <https://llvm.org/releases/>`_.
+lld is a high-performance linker that supports ELF (Unix), COFF
+(Windows), Mach-O (macOS), MinGW and WebAssembly. lld is
+command-line-compatible with GNU linkers and Microsoft link.exe and is
+significantly faster than the system default linkers.
+
+lld 9 has lots of feature improvements and bug fixes.
 
 Non-comprehensive list of changes in this release
 =================================================
@@ -22,52 +24,187 @@ ELF Improvements
 * ld.lld now has typo suggestions for flags:
   ``$ ld.lld --call-shared`` now prints
   ``unknown argument '--call-shared', did you mean '--call_shared'``.
+  (`r361518 <https://reviews.llvm.org/rL361518>`_)
+
+* ``--allow-shlib-undefined`` and ``--no-allow-shlib-undefined``
+  options are added. ``--no-allow-shlib-undefined`` is the default for
+  executables.
+  (`r352826 <https://reviews.llvm.org/rL352826>`_)
+
+* ``-nmagic`` and ``-omagic`` options are fully supported.
+  (`r360593 <https://reviews.llvm.org/rL360593>`_)
+
+* Segment layout has changed. PT_GNU_RELRO, which was previously
+  placed in the middle of readable/writable PT_LOAD segments, is now
+  placed at the beginning of them. This change permits lld-produced
+  ELF files to be read correctly by GNU strip older than 2.31, which
+  has a bug to discard a PT_GNU_RELRO in the former layout.
+
+* ``-z common-page-size`` is supported.
+  (`r360593 <https://reviews.llvm.org/rL360593>`_)
+
+* Diagnostics messages have improved. A new flag ``--vs-diagnostics``
+  alters the format of diagnostic output to enable source hyperlinks
+  in Microsoft Visual Studio IDE.
+
+* Linker script compatibility with GNU BFD linker has generally improved.
+
+* The clang ``--dependent-library`` form of autolinking is supported.
+
+  This feature is added to implement the Windows-style autolinking for
+  Unix. On Unix, in order to use a library, you usually have to
+  include a header file provided by the library and then explicitly
+  link the library with the linker ``-l`` option. On Windows, header
+  files usually contain pragmas that list needed libraries. Compilers
+  copy that information to object files, so that linkers can
+  automatically link needed libraries. ``--dependent-library`` is
+  added for implementing that Windows semantics on Unix.
+  (`r360984 <https://reviews.llvm.org/rL360984>`_)
+
+* AArch64 BTI and PAC are supported.
+  (`r362793 <https://reviews.llvm.org/rL362793>`_)
 
 * lld now supports replacing ``JAL`` with ``JALX`` instructions in case
-  of MIPS - microMIPS cross-mode jumps.
+  of MIPS-microMIPS cross-mode jumps.
+  (`r354311 <https://reviews.llvm.org/rL354311>`_)
 
 * lld now creates LA25 thunks for MIPS R6 code.
+  (`r354312 <https://reviews.llvm.org/rL354312>`_)
 
 * Put MIPS-specific .reginfo, .MIPS.options, and .MIPS.abiflags sections
   into corresponding PT_MIPS_REGINFO, PT_MIPS_OPTIONS, and PT_MIPS_ABIFLAGS
   segments.
 
+* The quality of RISC-V and PowerPC ports have greatly improved. Many
+  applications can now be linked by lld. PowerPC64 is now almost
+  production ready.
+
+* The Linux kernel for arm32_7, arm64, ppc64le and x86_64 can now be
+  linked by lld.
+
+* x86-64 TLSDESC is supported.
+  (`r361911 <https://reviews.llvm.org/rL361911>`_,
+  `r362078 <https://reviews.llvm.org/rL362078>`_)
+
+* DF_STATIC_TLS flag is set for i386 and x86-64 when needed.
+  (`r353293 <https://reviews.llvm.org/rL353293>`_,
+  `r353378 <https://reviews.llvm.org/rL353378>`_)
+
+* The experimental partitioning feature is added to allow a program to
+  be split into multiple pieces.
+
+  The feature allows you to semi-automatically split a single program
+  into multiple ELF files called "partitions". Since all partitions
+  share the same memory address space and don't use PLT/GOT, split
+  programs run as fast as regular programs.
+
+  With the mechanism, you can start a program only with a "main"
+  partition and load remaining partitions on-demand. For example, you
+  can split a web browser into a main partition and a PDF reader
+  sub-partition and load the PDF reader partition only when a user
+  tries to open a PDF file.
+
+  See `the documentation <Partitions.html>`_ for more information.
+
+* If "-" is given as an output filename, lld writes the final result
+  to the standard output. Previously, it created a file "-" in the
+  current directory.
+  (`r351852 <https://reviews.llvm.org/rL351852>`_)
+
+* ``-z ifunc-noplt`` option is added to reduce IFunc function call
+  overhead in a freestanding environment such as the OS kernel.
+
+  Functions resolved by the IFunc mechanism are usually dispatched via
+  PLT and thus slower than regular functions because of the cost of
+  indirection. With ``-z ifunc-noplt``, you can eliminate it by doing
+  text relocations at load-time. You need a special loader to utilize
+  this feature. This feature is added for the FreeBSD kernel but can
+  be used by any operating systems.
+  (`r360685 <https://reviews.llvm.org/rL360685>`_)
+
+* ``--undefined-glob`` option is added. The new option is an extension
+  to ``--undefined`` to take a glob pattern instead of a single symbol
+  name.
+  (`r363396 <https://reviews.llvm.org/rL363396>`_)
+
+
 COFF Improvements
 -----------------
 
 * Like the ELF driver, lld-link now has typo suggestions for flags.
+  (`r361518 <https://reviews.llvm.org/rL361518>`_)
 
-* lld-link now correctly reports duplicate symbol errors for obj files
-  that were compiled with /Gy.
+* lld-link now correctly reports duplicate symbol errors for object
+  files that were compiled with ``/Gy``.
+  (`r352590 <https://reviews.llvm.org/rL352590>`_)
 
-* lld-link now correctly reports duplicate symbol errors when several res
-  input files define resources with the same type, name, and language.
-  This can be demoted to a warning using ``/force:multipleres``.
+* lld-link now correctly reports duplicate symbol errors when several
+  resource (.res) input files define resources with the same type,
+  name and language.  This can be demoted to a warning using
+  ``/force:multipleres``.
+  (`r359829 <https://reviews.llvm.org/rL359829>`_)
 
-* lld-link now rejects more than one resource obj input files, matching
-  link.exe. Previously, lld-link would silently ignore all but one.
-  If you hit this: Don't pass resource obj files to the linker, instead pass
-  res files to the linker directly. Don't put res files in static libraries,
-  pass them on the command line.
+* lld-link now rejects more than one resource object input files,
+  matching link.exe. Previously, lld-link would silently ignore all
+  but one.  If you hit this: Don't pass resource object files to the
+  linker, instead pass res files to the linker directly. Don't put
+  resource files in static libraries, pass them on the command line.
+  (`r359749 <https://reviews.llvm.org/rL359749>`_)
 
 * Having more than two ``/natvis:`` now works correctly; it used to not
   work for larger binaries before.
+  (`r327895 <https://reviews.llvm.org/rL327895>`_)
 
 * Undefined symbols are now printed only in demangled form. Pass
   ``/demangle:no`` to see raw symbol names instead.
-
-* The following flags have been added: ``/functionpadmin``, ``/swaprun:``,
-  ``/threads:no``
+  (`r355878 <https://reviews.llvm.org/rL355878>`_)
 
 * Several speed and memory usage improvements.
 
-* Range extension thunks are now created for ARM64, if needed
-
 * lld-link now supports resource object files created by GNU windres and
-  MS cvtres, not only llvm-cvtres
+  MS cvtres, not only llvm-cvtres.
 
 * The generated thunks for delayimports now share the majority of code
-  among thunks, significantly reducing the overhead of using delayimport
+  among thunks, significantly reducing the overhead of using delayimport.
+  (`r365823 <https://reviews.llvm.org/rL365823>`_)
+
+* ``IMAGE_REL_ARM{,64}_REL32`` relocations are supported.
+  (`r352325 <https://reviews.llvm.org/rL352325>`_)
+
+* Range extension thunks for AArch64 are now supported, so lld can
+  create large executables for Windows/ARM64.
+  (`r352929 <https://reviews.llvm.org/rL352929>`_)
+
+* The following flags have been added:
+  ``/functionpadmin`` (`r354716 <https://reviews.llvm.org/rL354716>`_),
+  ``/swaprun:`` (`r359192 <https://reviews.llvm.org/rL359192>`_),
+  ``/threads:no`` (`r355029 <https://reviews.llvm.org/rL355029>`_),
+  ``/filealign`` (`r361634 <https://reviews.llvm.org/rL361634>`_)
+
+WebAssembly Improvements
+------------------------
+
+* Imports from custom module names are supported.
+  (`r352828 <https://reviews.llvm.org/rL352828>`_)
+
+* Symbols that are in llvm.used are now exported by default.
+  (`r353364 <https://reviews.llvm.org/rL353364>`_)
+
+* Initial support for PIC and dynamic linking has landed.
+  (`r357022 <https://reviews.llvm.org/rL357022>`_)
+
+* wasm-ld now add ``__start_``/``__stop_`` symbols for data sections.
+  (`r361236 <https://reviews.llvm.org/rL361236>`_)
+
+* wasm-ld now doesn't report an error on archives without a symbol index.
+  (`r364338 <https://reviews.llvm.org/rL364338>`_)
+
+* The following flags have been added:
+  ``--emit-relocs`` (`r361635 <https://reviews.llvm.org/rL361635>`_),
+  ``--wrap`` (`r361639 <https://reviews.llvm.org/rL361639>`_),
+  ``--trace`` and ``--trace-symbol``
+  (`r353264 <https://reviews.llvm.org/rL353264>`_).
+
 
 MinGW Improvements
 ------------------
@@ -77,12 +214,18 @@ MinGW Improvements
   DWARF exception handling with libgcc and gcc's crtend.o.
 
 * lld now also handles DWARF unwind info generated by GCC, when linking
-  with libgcc
-
-* Many more GNU ld options are now supported, which e.g. allows the lld
-  MinGW frontend to be called by GCC
+  with libgcc.
 
 * PDB output can be requested without manually specifying the PDB file
   name, with the new option ``-pdb=`` with an empty value to the option.
   (The old existing syntax ``-pdb <filename>`` was more cumbersome to use
   with an empty parameter value.)
+
+* ``--no-insert-timestamp`` option is added as an alias to ``/timestamp:0``.
+  (`r353145 <https://reviews.llvm.org/rL353145>`_)
+
+* Many more GNU ld options are now supported, which e.g. allows the lld
+  MinGW frontend to be called by GCC.
+
+* The following options are added: ``--exclude-all-symbols``,
+  ``--appcontainer``, ``--undefined``

lib/clang/include/VCSVersion.inc

@@ -1,14 +1,14 @@
 // $FreeBSD$
 
-#define LLVM_REVISION "370514"
+#define LLVM_REVISION "371301"
 #define LLVM_REPOSITORY "https://llvm.org/svn/llvm-project/llvm/branches/release_90"
 
-#define CLANG_REVISION "370514"
+#define CLANG_REVISION "371301"
 #define CLANG_REPOSITORY "https://llvm.org/svn/llvm-project/cfe/branches/release_90"
 
 // <Upstream revision at import>-<Local identifier in __FreeBSD_version style>
-#define LLD_REVISION "370514-1300004"
+#define LLD_REVISION "371301-1300004"
 #define LLD_REPOSITORY "FreeBSD"
 
-#define LLDB_REVISION "370514"
+#define LLDB_REVISION "371301"
 #define LLDB_REPOSITORY "https://llvm.org/svn/llvm-project/lldb/branches/release_90"

lib/clang/include/llvm/Support/VCSRevision.h

@@ -1,3 +1,3 @@
 /* $FreeBSD$ */
-#define LLVM_REVISION "370514"
+#define LLVM_REVISION "371301"
 #define LLVM_REPOSITORY "https://llvm.org/svn/llvm-project/llvm/branches/release_90"