21 files changed, 184 insertions, 113 deletions
diff --git a/include/clang/Driver/Action.h b/include/clang/Driver/Action.h
index f4aaa6c544..c1ff0b1a60 100644
--- a/include/clang/Driver/Action.h
+++ b/include/clang/Driver/Action.h
@@ -1,9 +1,8 @@
 //===- Action.h - Abstract compilation steps --------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 
diff --git a/include/clang/Driver/CC1Options.td b/include/clang/Driver/CC1Options.td
index 07c7688406..d18c37eb36 100644
--- a/include/clang/Driver/CC1Options.td
+++ b/include/clang/Driver/CC1Options.td
@@ -1,9 +1,8 @@
 //===--- CC1Options.td - Options for clang -cc1 ---------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 //
@@ -108,7 +107,7 @@ def analyzer_checker : Separate<["-"], "analyzer-checker">,
   ValuesCode<[{
     const char *Values =
     #define GET_CHECKERS
-    #define CHECKER(FULLNAME, CLASS, HT, DOC_URI)  FULLNAME ","
+    #define CHECKER(FULLNAME, CLASS, HT, DOC_URI, IS_HIDDEN)  FULLNAME ","
     #include "clang/StaticAnalyzer/Checkers/Checkers.inc"
     #undef GET_CHECKERS
     #define GET_PACKAGES
@@ -131,6 +130,10 @@ def analyzer_disable_all_checks : Flag<["-"], "analyzer-disable-all-checks">,
 def analyzer_checker_help : Flag<["-"], "analyzer-checker-help">,
   HelpText<"Display the list of analyzer checkers that are available">;
 
+def analyzer_checker_help_hidden : Flag<["-"], "analyzer-checker-help-hidden">,
+  HelpText<"Display the list of analyzer checkers that are available, "
+           "including modeling checkers">;
+
 def analyzer_config_help : Flag<["-"], "analyzer-config-help">,
   HelpText<"Display the list of -analyzer-config options">;
 
@@ -604,6 +607,8 @@ def arcmt_migrate : Flag<["-"], "arcmt-migrate">,
 
 def opt_record_file : Separate<["-"], "opt-record-file">,
   HelpText<"File name to use for YAML optimization record output">;
+def opt_record_passes : Separate<["-"], "opt-record-passes">,
+  HelpText<"Only record remark information for passes whose names match the given regular expression">;
 
 def print_stats : Flag<["-"], "print-stats">,
   HelpText<"Print performance metrics and statistics">;
@@ -703,6 +708,8 @@ def fvisibility : Separate<["-"], "fvisibility">,
   HelpText<"Default type and symbol visibility">;
 def ftype_visibility : Separate<["-"], "ftype-visibility">,
   HelpText<"Default type visibility">;
+def fapply_global_visibility_to_externs : Flag<["-"], "fapply-global-visibility-to-externs">,
+  HelpText<"Apply global symbol visibility to external declarations without an explicit visibility">;
 def ftemplate_depth : Separate<["-"], "ftemplate-depth">,
   HelpText<"Maximum depth of recursive template instantiation">;
 def foperator_arrow_depth : Separate<["-"], "foperator-arrow-depth">,
@@ -835,8 +842,14 @@ def fopenmp_is_device : Flag<["-"], "fopenmp-is-device">,
 def fopenmp_host_ir_file_path : Separate<["-"], "fopenmp-host-ir-file-path">,
   HelpText<"Path to the IR file produced by the frontend for the host.">;
 
-} // let Flags = [CC1Option]
+//===----------------------------------------------------------------------===//
+// SYCL Options
+//===----------------------------------------------------------------------===//
+
+def fsycl_is_device : Flag<["-"], "fsycl-is-device">,
+  HelpText<"Generate code for SYCL device.">;
 
+} // let Flags = [CC1Option]
 
 //===----------------------------------------------------------------------===//
 // cc1as-only Options
diff --git a/include/clang/Driver/CLCompatOptions.td b/include/clang/Driver/CLCompatOptions.td
index 3e0dc2db7d..fb02d856a2 100644
--- a/include/clang/Driver/CLCompatOptions.td
+++ b/include/clang/Driver/CLCompatOptions.td
@@ -1,9 +1,8 @@
 //===--- CLCompatOptions.td - Options for clang-cl ------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 //
@@ -167,7 +166,7 @@ def _SLASH_source_charset : CLCompileJoined<"source-charset:">,
 def _SLASH_execution_charset : CLCompileJoined<"execution-charset:">,
   HelpText<"Runtime encoding, supports only UTF-8">, Alias<fexec_charset_EQ>;
 def _SLASH_std : CLCompileJoined<"std:">,
-  HelpText<"Language standard to compile for">;
+  HelpText<"Language standard to compile for (c++14,c++17,c++latest)">;
 def _SLASH_U : CLJoinedOrSeparate<"U">, HelpText<"Undefine macro">,
   MetaVarName<"<macro>">, Alias<U>;
 def _SLASH_validate_charset : CLFlag<"validate-charset">,
@@ -395,14 +394,17 @@ def _SLASH_Zo_ : CLIgnoredFlag<"Zo-">;
 
 // Unsupported:
 
-def _SLASH_AI : CLJoined<"AI">;
+def _SLASH_await : CLFlag<"await">;
+def _SLASH_constexpr : CLJoined<"constexpr:">;
+def _SLASH_AI : CLJoinedOrSeparate<"AI">;
 def _SLASH_Bt : CLFlag<"Bt">;
 def _SLASH_Bt_plus : CLFlag<"Bt+">;
 def _SLASH_clr : CLJoined<"clr">;
+def _SLASH_d2 : CLJoined<"d2">;
 def _SLASH_doc : CLJoined<"doc">;
 def _SLASH_FA_joined : CLJoined<"FA">;
 def _SLASH_favor : CLJoined<"favor">;
-def _SLASH_F : CLFlag<"F">;
+def _SLASH_F : CLJoinedOrSeparate<"F">;
 def _SLASH_Fm : CLJoined<"Fm">;
 def _SLASH_Fr : CLJoined<"Fr">;
 def _SLASH_FR : CLJoined<"FR">;
@@ -426,10 +428,14 @@ def _SLASH_kernel : CLFlag<"kernel">;
 def _SLASH_LN : CLFlag<"LN">;
 def _SLASH_MP : CLJoined<"MP">;
 def _SLASH_openmp : CLFlag<"openmp">;
+def _SLASH_openmp_experimental : CLFlag<"openmp:experimental">;
 def _SLASH_Qfast_transcendentals : CLFlag<"Qfast_transcendentals">;
 def _SLASH_QIfist : CLFlag<"QIfist">;
 def _SLASH_Qimprecise_fwaits : CLFlag<"Qimprecise_fwaits">;
 def _SLASH_Qpar : CLFlag<"Qpar">;
+def _SLASH_Qpar_report : CLJoined<"Qpar-report">;
+def _SLASH_Qsafe_fp_loads : CLFlag<"Qsafe_fp_loads">;
+def _SLASH_Qspectre : CLFlag<"Qspectre">;
 def _SLASH_Qvec_report : CLJoined<"Qvec-report">;
 def _SLASH_u : CLFlag<"u">;
 def _SLASH_V : CLFlag<"V">;
diff --git a/include/clang/Driver/ClangOptionDocs.td b/include/clang/Driver/ClangOptionDocs.td
index 97c44692d2..5513642161 100644
--- a/include/clang/Driver/ClangOptionDocs.td
+++ b/include/clang/Driver/ClangOptionDocs.td
@@ -1,9 +1,8 @@
 //==--- ClangOptionDocs.td - Option documentation -------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 
diff --git a/include/clang/Driver/Compilation.h b/include/clang/Driver/Compilation.h
index 20eb07f6de..33ae133e05 100644
--- a/include/clang/Driver/Compilation.h
+++ b/include/clang/Driver/Compilation.h
@@ -1,9 +1,8 @@
 //===- Compilation.h - Compilation Task Data Structure ----------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 
diff --git a/include/clang/Driver/DarwinSDKInfo.h b/include/clang/Driver/DarwinSDKInfo.h
index 4ffb02fea3..f7075a8d3b 100644
--- a/include/clang/Driver/DarwinSDKInfo.h
+++ b/include/clang/Driver/DarwinSDKInfo.h
@@ -1,9 +1,8 @@
 //===--- DarwinSDKInfo.h - SDK Information parser for darwin ----*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 
diff --git a/include/clang/Driver/Distro.h b/include/clang/Driver/Distro.h
index 5651ebb6d4..67dc764fb7 100644
--- a/include/clang/Driver/Distro.h
+++ b/include/clang/Driver/Distro.h
@@ -1,9 +1,8 @@
 //===--- Distro.h - Linux distribution detection support --------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 
@@ -34,6 +33,7 @@ public:
     DebianJessie,
     DebianStretch,
     DebianBuster,
+    DebianBullseye,
     Exherbo,
     RHEL5,
     RHEL6,
@@ -64,6 +64,7 @@ public:
     UbuntuBionic,
     UbuntuCosmic,
     UbuntuDisco,
+    UbuntuEoan,
     UnknownDistro
   };
 
@@ -113,11 +114,11 @@ public:
   }
 
   bool IsDebian() const {
-    return DistroVal >= DebianLenny && DistroVal <= DebianBuster;
+    return DistroVal >= DebianLenny && DistroVal <= DebianBullseye;
   }
 
   bool IsUbuntu() const {
-    return DistroVal >= UbuntuHardy && DistroVal <= UbuntuDisco;
+    return DistroVal >= UbuntuHardy && DistroVal <= UbuntuEoan;
   }
 
   bool IsAlpineLinux() const {
diff --git a/include/clang/Driver/Driver.h b/include/clang/Driver/Driver.h
index 494336d672..03e6458a5e 100644
--- a/include/clang/Driver/Driver.h
+++ b/include/clang/Driver/Driver.h
@@ -1,9 +1,8 @@
 //===--- Driver.h - Clang GCC Compatible Driver -----------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 
@@ -278,6 +277,12 @@ private:
                               SmallString<128> &CrashDiagDir);
 
 public:
+
+  /// Takes the path to a binary that's either in bin/ or lib/ and returns
+  /// the path to clang's resource directory.
+  static std::string GetResourcesPath(StringRef BinaryPath,
+                                      StringRef CustomResourceDir = "");
+
   Driver(StringRef ClangExecutable, StringRef TargetTriple,
          DiagnosticsEngine &Diags,
          IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS = nullptr);
diff --git a/include/clang/Driver/DriverDiagnostic.h b/include/clang/Driver/DriverDiagnostic.h
index ad160ec6c6..ec2f8b403b 100644
--- a/include/clang/Driver/DriverDiagnostic.h
+++ b/include/clang/Driver/DriverDiagnostic.h
@@ -1,9 +1,8 @@
 //===--- DiagnosticDriver.h - Diagnostics for libdriver ---------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 
diff --git a/include/clang/Driver/Job.h b/include/clang/Driver/Job.h
index 870a31c520..41d9722808 100644
--- a/include/clang/Driver/Job.h
+++ b/include/clang/Driver/Job.h
@@ -1,9 +1,8 @@
 //===- Job.h - Commands to Execute ------------------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 
diff --git a/include/clang/Driver/Multilib.h b/include/clang/Driver/Multilib.h
index 132d981854..abf0d5fa6e 100644
--- a/include/clang/Driver/Multilib.h
+++ b/include/clang/Driver/Multilib.h
@@ -1,9 +1,8 @@
 //===- Multilib.h -----------------------------------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 
@@ -35,10 +34,11 @@ private:
   std::string OSSuffix;
   std::string IncludeSuffix;
   flags_list Flags;
+  int Priority;
 
 public:
   Multilib(StringRef GCCSuffix = {}, StringRef OSSuffix = {},
-           StringRef IncludeSuffix = {});
+           StringRef IncludeSuffix = {}, int Priority = 0);
 
   /// Get the detected GCC installation path suffix for the multi-arch
   /// target variant. Always starts with a '/', unless empty
@@ -78,6 +78,10 @@ public:
   const flags_list &flags() const { return Flags; }
   flags_list &flags() { return Flags; }
 
+  /// Returns the multilib priority. When more than one multilib matches flags,
+  /// the one with the highest priority is selected, with 0 being the default.
+  int priority() const { return Priority; }
+
   /// Add a flag to the flags list
   /// \p Flag must be a flag accepted by the driver with its leading '-' removed,
   ///     and replaced with either:
diff --git a/include/clang/Driver/Options.h b/include/clang/Driver/Options.h
index 2da3cb4828..f8963d4811 100644
--- a/include/clang/Driver/Options.h
+++ b/include/clang/Driver/Options.h
@@ -1,9 +1,8 @@
 //===--- Options.h - Option info & table ------------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 
diff --git a/include/clang/Driver/Options.td b/include/clang/Driver/Options.td
index f02a7190f5..a293a39f28 100644
--- a/include/clang/Driver/Options.td
+++ b/include/clang/Driver/Options.td
@@ -1,9 +1,8 @@
 //===--- Options.td - Options for clang -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 //
@@ -552,9 +551,9 @@ def cuda_compile_host_device : Flag<["--"], "cuda-compile-host-device">,
   HelpText<"Compile CUDA code for both host and device (default).  Has no "
            "effect on non-CUDA compilations.">;
 def cuda_include_ptx_EQ : Joined<["--"], "cuda-include-ptx=">, Flags<[DriverOption]>,
-  HelpText<"Include PTX for the follwing GPU architecture (e.g. sm_35) or 'all'. May be specified more than once.">;
+  HelpText<"Include PTX for the following GPU architecture (e.g. sm_35) or 'all'. May be specified more than once.">;
 def no_cuda_include_ptx_EQ : Joined<["--"], "no-cuda-include-ptx=">, Flags<[DriverOption]>,
-  HelpText<"Do not include PTX for the follwing GPU architecture (e.g. sm_35) or 'all'. May be specified more than once.">;
+  HelpText<"Do not include PTX for the following GPU architecture (e.g. sm_35) or 'all'. May be specified more than once.">;
 def cuda_gpu_arch_EQ : Joined<["--"], "cuda-gpu-arch=">, Flags<[DriverOption]>,
   HelpText<"CUDA GPU architecture (e.g. sm_35).  May be specified more than once.">;
 def hip_link : Flag<["--"], "hip-link">,
@@ -743,24 +742,30 @@ def fno_coverage_mapping : Flag<["-"], "fno-coverage-mapping">,
     Group<f_Group>, Flags<[DriverOption, CoreOption]>,
     HelpText<"Disable code coverage analysis">;
 def fprofile_generate : Flag<["-"], "fprofile-generate">,
-    Group<f_Group>, Flags<[DriverOption]>,
+    Group<f_Group>, Flags<[CoreOption]>,
     HelpText<"Generate instrumented code to collect execution counts into default.profraw (overridden by LLVM_PROFILE_FILE env var)">;
 def fprofile_generate_EQ : Joined<["-"], "fprofile-generate=">,
-    Group<f_Group>, Flags<[DriverOption]>, MetaVarName<"<directory>">,
+    Group<f_Group>, Flags<[CoreOption]>, MetaVarName<"<directory>">,
     HelpText<"Generate instrumented code to collect execution counts into <directory>/default.profraw (overridden by LLVM_PROFILE_FILE env var)">;
+def fcs_profile_generate : Flag<["-"], "fcs-profile-generate">,
+    Group<f_Group>, Flags<[CoreOption]>,
+    HelpText<"Generate instrumented code to collect context sensitive execution counts into default.profraw (overridden by LLVM_PROFILE_FILE env var)">;
+def fcs_profile_generate_EQ : Joined<["-"], "fcs-profile-generate=">,
+    Group<f_Group>, Flags<[CoreOption]>, MetaVarName<"<directory>">,
+    HelpText<"Generate instrumented code to collect context sensitive execution counts into <directory>/default.profraw (overridden by LLVM_PROFILE_FILE env var)">;
 def fprofile_use : Flag<["-"], "fprofile-use">, Group<f_Group>,
     Alias<fprofile_instr_use>;
 def fprofile_use_EQ : Joined<["-"], "fprofile-use=">,
     Group<f_Group>, Flags<[DriverOption]>, MetaVarName<"<pathname>">,
     HelpText<"Use instrumentation data for profile-guided optimization. If pathname is a directory, it reads from <pathname>/default.profdata. Otherwise, it reads from file <pathname>.">;
 def fno_profile_instr_generate : Flag<["-"], "fno-profile-instr-generate">,
-    Group<f_Group>, Flags<[DriverOption]>,
+    Group<f_Group>, Flags<[CoreOption]>,
     HelpText<"Disable generation of profile instrumentation.">;
 def fno_profile_generate : Flag<["-"], "fno-profile-generate">,
-    Group<f_Group>, Flags<[DriverOption]>,
+    Group<f_Group>, Flags<[CoreOption]>,
     HelpText<"Disable generation of profile instrumentation.">;
 def fno_profile_instr_use : Flag<["-"], "fno-profile-instr-use">,
-    Group<f_Group>, Flags<[DriverOption]>,
+    Group<f_Group>, Flags<[CoreOption]>,
     HelpText<"Disable using instrumentation data for profile-guided optimization">;
 def fno_profile_use : Flag<["-"], "fno-profile-use">,
     Alias<fno_profile_instr_use>;
@@ -770,6 +775,9 @@ def fprofile_filter_files_EQ : Joined<["-"], "fprofile-filter-files=">,
 def fprofile_exclude_files_EQ : Joined<["-"], "fprofile-exclude-files=">,
     Group<f_Group>, Flags<[CC1Option, CoreOption]>,
     HelpText<"Instrument only functions from files where names don't match all the regexes separated by a semi-colon">;
+def forder_file_instrumentation : Flag<["-"], "forder-file-instrumentation">,
+    Group<f_Group>, Flags<[CC1Option, CoreOption]>,
+    HelpText<"Generate instrumented code to collect order file into default.profraw file (overridden by '=' form of option or LLVM_PROFILE_FILE env var)">;
 
 def faddrsig : Flag<["-"], "faddrsig">, Group<f_Group>, Flags<[CoreOption, CC1Option]>,
   HelpText<"Emit an address-significance table">;
@@ -902,7 +910,7 @@ def fno_fast_math : Flag<["-"], "fno-fast-math">, Group<f_Group>;
 def fmath_errno : Flag<["-"], "fmath-errno">, Group<f_Group>, Flags<[CC1Option]>,
   HelpText<"Require math functions to indicate errors by setting errno">;
 def fno_math_errno : Flag<["-"], "fno-math-errno">, Group<f_Group>;
-def fbracket_depth_EQ : Joined<["-"], "fbracket-depth=">, Group<f_Group>;
+def fbracket_depth_EQ : Joined<["-"], "fbracket-depth=">, Group<f_Group>, Flags<[CoreOption]>;
 def fsignaling_math : Flag<["-"], "fsignaling-math">, Group<f_Group>;
 def fno_signaling_math : Flag<["-"], "fno-signaling-math">, Group<f_Group>;
 def fjump_tables : Flag<["-"], "fjump-tables">, Group<f_Group>;
@@ -1574,6 +1582,8 @@ def fopenmp_cuda_number_of_sm_EQ : Joined<["-"], "fopenmp-cuda-number-of-sm=">,
   Flags<[CC1Option, NoArgumentUnused, HelpHidden]>;
 def fopenmp_cuda_blocks_per_sm_EQ : Joined<["-"], "fopenmp-cuda-blocks-per-sm=">, Group<f_Group>,
   Flags<[CC1Option, NoArgumentUnused, HelpHidden]>;
+def fopenmp_cuda_teams_reduction_recs_num_EQ : Joined<["-"], "fopenmp-cuda-teams-reduction-recs-num=">, Group<f_Group>,
+  Flags<[CC1Option, NoArgumentUnused, HelpHidden]>;
 def fopenmp_optimistic_collapse : Flag<["-"], "fopenmp-optimistic-collapse">, Group<f_Group>,
   Flags<[CC1Option, NoArgumentUnused, HelpHidden]>;
 def fno_openmp_optimistic_collapse : Flag<["-"], "fno-openmp-optimistic-collapse">, Group<f_Group>,
@@ -1607,12 +1617,15 @@ def fplt : Flag<["-"], "fplt">, Group<f_Group>, Flags<[CC1Option]>,
   HelpText<"Use the PLT to make function calls">;
 def fno_plt : Flag<["-"], "fno-plt">, Group<f_Group>, Flags<[CC1Option]>,
   HelpText<"Do not use the PLT to make function calls">;
-def fropi : Flag<["-"], "fropi">, Group<f_Group>;
+def fropi : Flag<["-"], "fropi">, Group<f_Group>, Flags<[CC1Option]>;
 def fno_ropi : Flag<["-"], "fno-ropi">, Group<f_Group>;
-def frwpi : Flag<["-"], "frwpi">, Group<f_Group>;
+def frwpi : Flag<["-"], "frwpi">, Group<f_Group>, Flags<[CC1Option]>;
 def fno_rwpi : Flag<["-"], "fno-rwpi">, Group<f_Group>;
 def fplugin_EQ : Joined<["-"], "fplugin=">, Group<f_Group>, Flags<[DriverOption]>, MetaVarName<"<dsopath>">,
   HelpText<"Load the named plugin (dynamic shared object)">;
+def fpass_plugin_EQ : Joined<["-"], "fpass-plugin=">,
+  Group<f_Group>, Flags<[CC1Option]>, MetaVarName<"<dsopath>">,
+  HelpText<"Load pass plugin from a dynamic shared object file (only with new pass manager).">;
 def fpreserve_as_comments : Flag<["-"], "fpreserve-as-comments">, Group<f_Group>;
 def fno_preserve_as_comments : Flag<["-"], "fno-preserve-as-comments">, Group<f_Group>, Flags<[CC1Option]>,
   HelpText<"Do not preserve comments in inline assembly">;
@@ -1702,6 +1715,10 @@ def fno_save_optimization_record : Flag<["-"], "fno-save-optimization-record">,
 def foptimization_record_file_EQ : Joined<["-"], "foptimization-record-file=">,
   Group<f_Group>,
   HelpText<"Specify the file name of any generated YAML optimization record">;
+def foptimization_record_passes_EQ : Joined<["-"], "foptimization-record-passes=">,
+  Group<f_Group>,
+  HelpText<"Only include passes which match a specified regular expression in the generated optimization record (by default, include all passes)">;
+
 
 def ftest_coverage : Flag<["-"], "ftest-coverage">, Group<f_Group>;
 def fvectorize : Flag<["-"], "fvectorize">, Group<f_Group>,
@@ -1728,6 +1745,7 @@ def Wframe_larger_than_EQ : Joined<["-"], "Wframe-larger-than=">, Group<f_Group>
 def : Flag<["-"], "fterminated-vtables">, Alias<fapple_kext>;
 def fthreadsafe_statics : Flag<["-"], "fthreadsafe-statics">, Group<f_Group>;
 def ftime_report : Flag<["-"], "ftime-report">, Group<f_Group>, Flags<[CC1Option]>;
+def ftime_trace : Flag<["-"], "ftime-trace">, Group<f_Group>, Flags<[CC1Option]>;
 def ftlsmodel_EQ : Joined<["-"], "ftls-model=">, Group<f_Group>, Flags<[CC1Option]>;
 def ftrapv : Flag<["-"], "ftrapv">, Group<f_Group>, Flags<[CC1Option]>,
   HelpText<"Trap on integer overflow">;
@@ -1999,8 +2017,8 @@ def mexecute_only : Flag<["-"], "mexecute-only">, Group<m_arm_Features_Group>,
   HelpText<"Disallow generation of data access to code sections (ARM only)">;
 def mno_execute_only : Flag<["-"], "mno-execute-only">, Group<m_arm_Features_Group>,
   HelpText<"Allow generation of data access to code sections (ARM only)">;
-def mtp_mode_EQ : Joined<["-"], "mtp=">, Group<m_arm_Features_Group>, Values<"soft, cp15">,
-  HelpText<"Read thread pointer from coprocessor register (ARM only)">;
+def mtp_mode_EQ : Joined<["-"], "mtp=">, Group<m_arm_Features_Group>, Values<"soft,cp15,el0,el1,el2,el3">,
+  HelpText<"Thread pointer access method (AArch32/AArch64 only)">;
 def mpure_code : Flag<["-"], "mpure-code">, Alias<mexecute_only>; // Alias for GCC compatibility
 def mno_pure_code : Flag<["-"], "mno-pure-code">, Alias<mno_execute_only>;
 def mtvos_version_min_EQ : Joined<["-"], "mtvos-version-min=">, Group<m_Group>;
@@ -2132,7 +2150,7 @@ def mfix_cortex_a53_835769 : Flag<["-"], "mfix-cortex-a53-835769">,
 def mno_fix_cortex_a53_835769 : Flag<["-"], "mno-fix-cortex-a53-835769">,
   Group<m_aarch64_Features_Group>,
   HelpText<"Don't workaround Cortex-A53 erratum 835769 (AArch64 only)">;
-foreach i = {1-7,18,20} in
+foreach i = {1-7,9-15,18,20-28} in
   def ffixed_x#i : Flag<["-"], "ffixed-x"#i>, Group<m_aarch64_Features_Group>,
     HelpText<"Reserve the "#i#" register (AArch64 only)">;
 
@@ -2156,6 +2174,12 @@ def msign_ext : Flag<["-"], "msign-ext">, Group<m_wasm_Features_Group>;
 def mno_sign_ext : Flag<["-"], "mno-sign-ext">, Group<m_wasm_Features_Group>;
 def mexception_handing : Flag<["-"], "mexception-handling">, Group<m_wasm_Features_Group>;
 def mno_exception_handing : Flag<["-"], "mno-exception-handling">, Group<m_wasm_Features_Group>;
+def matomics : Flag<["-"], "matomics">, Group<m_wasm_Features_Group>;
+def mno_atomics : Flag<["-"], "mno-atomics">, Group<m_wasm_Features_Group>;
+def mbulk_memory : Flag<["-"], "mbulk-memory">, Group<m_wasm_Features_Group>;
+def mno_bulk_memory : Flag<["-"], "mno-bulk-memory">, Group<m_wasm_Features_Group>;
+def mmutable_globals : Flag<["-"], "mmutable-globals">, Group<m_wasm_Features_Group>;
+def mno_mutable_globals : Flag<["-"], "mno-mutable-globals">, Group<m_wasm_Features_Group>;
 
 def mamdgpu_debugger_abi : Joined<["-"], "mamdgpu-debugger-abi=">,
   Flags<[HelpHidden]>,
@@ -2418,6 +2442,14 @@ def modd_spreg : Flag<["-"], "modd-spreg">, Group<m_mips_Features_Group>,
 def mno_odd_spreg : Flag<["-"], "mno-odd-spreg">, Group<m_mips_Features_Group>,
   HelpText<"Disable odd single-precision floating point registers">,
   Flags<[HelpHidden]>;
+def mrelax_pic_calls : Flag<["-"], "mrelax-pic-calls">,
+  Group<m_mips_Features_Group>,
+  HelpText<"Produce relaxation hints for linkers to try optimizing PIC "
+           "call sequences into direct calls (MIPS only)">, Flags<[HelpHidden]>;
+def mno_relax_pic_calls : Flag<["-"], "mno-relax-pic-calls">,
+  Group<m_mips_Features_Group>,
+  HelpText<"Do not produce relaxation hints for linkers to try optimizing PIC "
+           "call sequences into direct calls (MIPS only)">, Flags<[HelpHidden]>;
 def mglibc : Flag<["-"], "mglibc">, Group<m_libc_Group>, Flags<[HelpHidden]>;
 def muclibc : Flag<["-"], "muclibc">, Group<m_libc_Group>, Flags<[HelpHidden]>;
 def module_file_info : Flag<["-"], "module-file-info">, Flags<[DriverOption,CC1Option]>, Group<Action_Group>,
@@ -2494,6 +2526,7 @@ def pthread : Flag<["-"], "pthread">, Flags<[CC1Option]>,
 def no_pthread : Flag<["-"], "no-pthread">, Flags<[CC1Option]>;
 def p : Flag<["-"], "p">;
 def pie : Flag<["-"], "pie">;
+def static_pie : Flag<["-"], "static-pie">;
 def read__only__relocs : Separate<["-"], "read_only_relocs">;
 def remap : Flag<["-"], "remap">;
 def rewrite_objc : Flag<["-"], "rewrite-objc">, Flags<[DriverOption,CC1Option]>,
@@ -2561,6 +2594,8 @@ def std_EQ : Joined<["-", "--"], "std=">, Flags<[CC1Option]>,
   }]>;
 def stdlib_EQ : Joined<["-", "--"], "stdlib=">, Flags<[CC1Option]>,
   HelpText<"C++ standard library to use">, Values<"libc++,libstdc++,platform">;
+def unwindlib_EQ : Joined<["-", "--"], "unwindlib=">, Flags<[CC1Option]>,
+  HelpText<"Unwind library to use">, Values<"libgcc,unwindlib,platform">;
 def sub__library : JoinedOrSeparate<["-"], "sub_library">;
 def sub__umbrella : JoinedOrSeparate<["-"], "sub_umbrella">;
 def system_header_prefix : Joined<["--"], "system-header-prefix=">,
@@ -2819,6 +2854,8 @@ def mavx2 : Flag<["-"], "mavx2">, Group<m_x86_Features_Group>;
 def mno_avx2 : Flag<["-"], "mno-avx2">, Group<m_x86_Features_Group>;
 def mavx512f : Flag<["-"], "mavx512f">, Group<m_x86_Features_Group>;
 def mno_avx512f : Flag<["-"], "mno-avx512f">, Group<m_x86_Features_Group>;
+def mavx512bf16 : Flag<["-"], "mavx512bf16">, Group<m_x86_Features_Group>;
+def mno_avx512bf16 : Flag<["-"], "mno-avx512bf16">, Group<m_x86_Features_Group>;
 def mavx512bitalg : Flag<["-"], "mavx512bitalg">, Group<m_x86_Features_Group>;
 def mno_avx512bitalg : Flag<["-"], "mno-avx512bitalg">, Group<m_x86_Features_Group>;
 def mavx512bw : Flag<["-"], "mavx512bw">, Group<m_x86_Features_Group>;
diff --git a/include/clang/Driver/Phases.h b/include/clang/Driver/Phases.h
index cd6b5b5c9f..7199c65784 100644
--- a/include/clang/Driver/Phases.h
+++ b/include/clang/Driver/Phases.h
@@ -1,9 +1,8 @@
 //===--- Phases.h - Transformations on Driver Types -------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 
diff --git a/include/clang/Driver/SanitizerArgs.h b/include/clang/Driver/SanitizerArgs.h
index e590a49dee..957e752b68 100644
--- a/include/clang/Driver/SanitizerArgs.h
+++ b/include/clang/Driver/SanitizerArgs.h
@@ -1,9 +1,8 @@
 //===--- SanitizerArgs.h - Arguments for sanitizer tools  -------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 #ifndef LLVM_CLANG_DRIVER_SANITIZERARGS_H
@@ -39,6 +38,8 @@ class SanitizerArgs {
   bool AsanPoisonCustomArrayCookie = false;
   bool AsanGlobalsDeadStripping = false;
   bool AsanUseOdrIndicator = false;
+  bool AsanInvalidPointerCmp = false;
+  bool AsanInvalidPointerSub = false;
   std::string HwasanAbi;
   bool LinkCXXRuntimes = false;
   bool NeedPIE = false;
@@ -74,9 +75,6 @@ class SanitizerArgs {
   bool needsCfiRt() const;
   bool needsCfiDiagRt() const;
   bool needsStatsRt() const { return Stats; }
-  bool needsEsanRt() const {
-    return Sanitizers.hasOneOf(SanitizerKind::Efficiency);
-  }
   bool needsScudoRt() const { return Sanitizers.has(SanitizerKind::Scudo); }
 
   bool requiresPIE() const;
diff --git a/include/clang/Driver/Tool.h b/include/clang/Driver/Tool.h
index b02ac66d3b..8d04916069 100644
--- a/include/clang/Driver/Tool.h
+++ b/include/clang/Driver/Tool.h
@@ -1,9 +1,8 @@
 //===--- Tool.h - Compilation Tools -----------------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 
diff --git a/include/clang/Driver/ToolChain.h b/include/clang/Driver/ToolChain.h
index d5f75b8271..4ccf8413ff 100644
--- a/include/clang/Driver/ToolChain.h
+++ b/include/clang/Driver/ToolChain.h
@@ -1,9 +1,8 @@
 //===- ToolChain.h - Collections of tools for one platform ------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 
@@ -100,11 +99,19 @@ public:
     RLT_Libgcc
   };
 
+  enum UnwindLibType {
+    UNW_None,
+    UNW_CompilerRT,
+    UNW_Libgcc
+  };
+
   enum RTTIMode {
     RM_Enabled,
     RM_Disabled,
   };
 
+  enum FileType { FT_Object, FT_Static, FT_Shared };
+
 private:
   friend class RegisterEffectiveTriple;
 
@@ -368,15 +375,19 @@ public:
     return ToolChain::CST_Libstdcxx;
   }
 
+  virtual UnwindLibType GetDefaultUnwindLibType() const {
+    return ToolChain::UNW_None;
+  }
+
   virtual std::string getCompilerRTPath() const;
 
   virtual std::string getCompilerRT(const llvm::opt::ArgList &Args,
                                     StringRef Component,
-                                    bool Shared = false) const;
+                                    FileType Type = ToolChain::FT_Static) const;
 
-  const char *getCompilerRTArgString(const llvm::opt::ArgList &Args,
-                                     StringRef Component,
-                                     bool Shared = false) const;
+  const char *
+  getCompilerRTArgString(const llvm::opt::ArgList &Args, StringRef Component,
+                         FileType Type = ToolChain::FT_Static) const;
 
   // Returns <ResourceDir>/lib/<OSName>/<arch>.  This is used by runtimes (such
   // as OpenMP) to find arch-specific libraries.
@@ -401,6 +412,9 @@ public:
   /// Test whether this toolchain defaults to PIE.
   virtual bool isPIEDefault() const = 0;
 
+  /// Test whether this toolchaind defaults to non-executable stacks.
+  virtual bool isNoExecStackDefault() const;
+
   /// Tests whether this toolchain forces its default for PIC, PIE or
   /// non-PIC.  If this returns true, any PIC related flags should be ignored
   /// and instead the results of \c isPICDefault() and \c isPIEDefault() are
@@ -512,6 +526,10 @@ public:
   // given compilation arguments.
   virtual CXXStdlibType GetCXXStdlibType(const llvm::opt::ArgList &Args) const;
 
+  // GetUnwindLibType - Determine the unwind library type to use with the
+  // given compilation arguments.
+  virtual UnwindLibType GetUnwindLibType(const llvm::opt::ArgList &Args) const;
+
   /// AddClangCXXStdlibIncludeArgs - Add the clang -cc1 level arguments to set
   /// the include paths to use for the given C++ standard library type.
   virtual void
@@ -564,7 +582,9 @@ public:
   virtual SanitizerMask getSupportedSanitizers() const;
 
   /// Return sanitizers which are enabled by default.
-  virtual SanitizerMask getDefaultSanitizers() const { return 0; }
+  virtual SanitizerMask getDefaultSanitizers() const {
+    return SanitizerMask();
+  }
 };
 
 /// Set a ToolChain's effective triple. Reset it when the registration object
diff --git a/include/clang/Driver/Types.def b/include/clang/Driver/Types.def
index c25bc4b080..d2aaf58f15 100644
--- a/include/clang/Driver/Types.def
+++ b/include/clang/Driver/Types.def
@@ -1,9 +1,8 @@
 //===--- Types.def - Driver Type info ---------------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 //
diff --git a/include/clang/Driver/Types.h b/include/clang/Driver/Types.h
index 5bc6668a0d..53afada7ab 100644
--- a/include/clang/Driver/Types.h
+++ b/include/clang/Driver/Types.h
@@ -1,9 +1,8 @@
 //===--- Types.h - Input & Temporary Driver Types ---------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 
diff --git a/include/clang/Driver/Util.h b/include/clang/Driver/Util.h
index 07495a1850..6788420912 100644
--- a/include/clang/Driver/Util.h
+++ b/include/clang/Driver/Util.h
@@ -1,9 +1,8 @@
 //===--- Util.h - Common Driver Utilities -----------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 
diff --git a/include/clang/Driver/XRayArgs.h b/include/clang/Driver/XRayArgs.h
index c7ca945291..fa2583f4b9 100644
--- a/include/clang/Driver/XRayArgs.h
+++ b/include/clang/Driver/XRayArgs.h
@@ -1,9 +1,8 @@
 //===--- XRayArgs.h - Arguments for XRay ------------------------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 #ifndef LLVM_CLANG_DRIVER_XRAYARGS_H