MFC 261991:

Upgrade our copy of llvm/clang to 3.4 release.  This version supports
all of the features in the current working draft of the upcoming C++
standard, provisionally named C++1y.

The code generator's performance is greatly increased, and the loop
auto-vectorizer is now enabled at -Os and -O2 in addition to -O3.  The
PowerPC backend has made several major improvements to code generation
quality and compile time, and the X86, SPARC, ARM32, Aarch64 and SystemZ
backends have all seen major feature work.

Release notes for llvm and clang can be found here:
<http://llvm.org/releases/3.4/docs/ReleaseNotes.html>
<http://llvm.org/releases/3.4/tools/clang/docs/ReleaseNotes.html>

MFC 262121 (by emaste):

Update lldb for clang/llvm 3.4 import

This commit largely restores the lldb source to the upstream r196259
snapshot with the addition of threaded inferior support and a few bug
fixes.

Specific upstream lldb revisions restored include:
   SVN      git
  181387  779e6ac
  181703  7bef4e2
  182099  b31044e
  182650  f2dcf35
  182683  0d91b80
  183862  15c1774
  183929  99447a6
  184177  0b2934b
  184948  4dc3761
  184954  007e7bc
  186990  eebd175

Sponsored by:	DARPA, AFRL

MFC 262186 (by emaste):

Fix mismerge in r262121

A break statement was lost in the merge.  The error had no functional
impact, but restore it to reduce the diff against upstream.

MFC 262303:

Pull in r197521 from upstream clang trunk (by rdivacky):

  Use the integrated assembler by default on FreeBSD/ppc and ppc64.

Requested by:	jhibbits

MFC 262611:

Pull in r196874 from upstream llvm trunk:

  Fix a crash that occurs when PWD is invalid.

  MCJIT needs to be able to run in hostile environments, even when PWD
  is invalid. There's no need to crash MCJIT in this case.

  The obvious fix is to simply leave MCContext's CompilationDir empty
  when PWD can't be determined. This way, MCJIT clients,
  and other clients that link with LLVM don't need a valid working directory.

  If we do want to guarantee valid CompilationDir, that should be done
  only for clients of getCompilationDir(). This is as simple as checking
  for an empty string.

  The only current use of getCompilationDir is EmitGenDwarfInfo, which
  won't conceivably run with an invalid working dir. However, in the
  purely hypothetically and untestable case that this happens, the
  AT_comp_dir will be omitted from the compilation_unit DIE.

This should help fix assertions occurring with ports-mgmt/tinderbox,
when it is using jails, and sometimes invalidates clang's current
working directory.

Reported by:	decke

MFC 262809:

Pull in r203007 from upstream clang trunk:

  Don't produce an alias between destructors with different calling conventions.

  Fixes pr19007.

(Please note that is an LLVM PR identifier, not a FreeBSD one.)

This should fix Firefox and/or libxul crashes (due to problems with
regparm/stdcall calling conventions) on i386.

Reported by:	multiple users on freebsd-current
PR:		bin/187103

MFC 263048:

Repair recognition of "CC" as an alias for the C++ compiler, since it
was silently broken by upstream for a Windows-specific use-case.

Apparently some versions of CMake still rely on this archaic feature...

Reported by:	rakuco

MFC 263049:

Garbage collect the old way of adding the libstdc++ include directories
in clang's InitHeaderSearch.cpp.  This has been superseded by David
Chisnall's commit in r255321.

Moreover, if libc++ is used, the libstdc++ include directories should
not be in the search path at all.  These directories are now only used
if you pass -stdlib=libstdc++.

1 files changed, 201 insertions, 80 deletions

diff --git a/contrib/llvm/tools/clang/lib/Frontend/CompilerInvocation.cpp b/contrib/llvm/tools/clang/lib/Frontend/CompilerInvocation.cpp
index 8dd2cb6..ec1e53f 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/CompilerInvocation.cpp
@@ -11,13 +11,11 @@
 #include "clang/Basic/Diagnostic.h"
 #include "clang/Basic/FileManager.h"
 #include "clang/Basic/Version.h"
-#include "clang/Driver/Arg.h"
-#include "clang/Driver/ArgList.h"
 #include "clang/Driver/DriverDiagnostic.h"
-#include "clang/Driver/OptTable.h"
-#include "clang/Driver/Option.h"
 #include "clang/Driver/Options.h"
+#include "clang/Driver/Util.h"
 #include "clang/Frontend/LangStandard.h"
+#include "clang/Frontend/Utils.h"
 #include "clang/Lex/HeaderSearchOptions.h"
 #include "clang/Serialization/ASTReader.h"
 #include "llvm/ADT/Hashing.h"
@@ -26,10 +24,17 @@
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/ADT/Triple.h"
+#include "llvm/Option/Arg.h"
+#include "llvm/Option/ArgList.h"
+#include "llvm/Option/OptTable.h"
+#include "llvm/Option/Option.h"
 #include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/FileSystem.h"
 #include "llvm/Support/Host.h"
 #include "llvm/Support/Path.h"
+#include "llvm/Support/Process.h"
 #include "llvm/Support/system_error.h"
+#include <sys/stat.h>
 using namespace clang;
 
 //===----------------------------------------------------------------------===//
@@ -56,6 +61,7 @@ CompilerInvocationBase::CompilerInvocationBase(const CompilerInvocationBase &X)
 
 using namespace clang::driver;
 using namespace clang::driver::options;
+using namespace llvm::opt;
 
 //
 
@@ -78,7 +84,7 @@ static unsigned getOptimizationLevel(ArgList &Args, InputKind IK,
     if (S == "s" || S == "z" || S.empty())
       return 2;
 
-    return Args.getLastArgIntValue(OPT_O, DefaultOpt, Diags);
+    return getLastArgIntValue(Args, OPT_O, DefaultOpt, Diags);
   }
 
   return DefaultOpt;
@@ -162,7 +168,7 @@ static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
   if (Arg *A = Args.getLastArg(OPT_analyzer_output)) {
     StringRef Name = A->getValue();
     AnalysisDiagClients Value = llvm::StringSwitch<AnalysisDiagClients>(Name)
-#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN, AUTOCREAT) \
+#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATFN) \
       .Case(CMDFLAG, PD_##NAME)
 #include "clang/StaticAnalyzer/Core/Analyses.def"
       .Default(NUM_ANALYSIS_DIAG_CLIENTS);
@@ -221,11 +227,12 @@ static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
   Opts.AnalyzeSpecificFunction = Args.getLastArgValue(OPT_analyze_function);
   Opts.UnoptimizedCFG = Args.hasArg(OPT_analysis_UnoptimizedCFG);
   Opts.TrimGraph = Args.hasArg(OPT_trim_egraph);
-  Opts.maxBlockVisitOnPath = Args.getLastArgIntValue(OPT_analyzer_max_loop, 4, Diags);
+  Opts.maxBlockVisitOnPath =
+      getLastArgIntValue(Args, OPT_analyzer_max_loop, 4, Diags);
   Opts.PrintStats = Args.hasArg(OPT_analyzer_stats);
   Opts.InlineMaxStackDepth =
-    Args.getLastArgIntValue(OPT_analyzer_inline_max_stack_depth,
-                            Opts.InlineMaxStackDepth, Diags);
+      getLastArgIntValue(Args, OPT_analyzer_inline_max_stack_depth,
+                         Opts.InlineMaxStackDepth, Diags);
 
   Opts.CheckersControlList.clear();
   for (arg_iterator it = Args.filtered_begin(OPT_analyzer_checker,
@@ -292,14 +299,15 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
   using namespace options;
   bool Success = true;
 
-  unsigned OptLevel = getOptimizationLevel(Args, IK, Diags);
-  if (OptLevel > 3) {
-    Diags.Report(diag::err_drv_invalid_value)
-      << Args.getLastArg(OPT_O)->getAsString(Args) << OptLevel;
-    OptLevel = 3;
-    Success = false;
+  Opts.OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
+  // TODO: This could be done in Driver
+  unsigned MaxOptLevel = 3;
+  if (Opts.OptimizationLevel > MaxOptLevel) {
+    // If the optimization level is not supported, fall back on the default optimization
+    Diags.Report(diag::warn_drv_optimization_value)
+        << Args.getLastArg(OPT_O)->getAsString(Args) << "-O" << MaxOptLevel;
+    Opts.OptimizationLevel = MaxOptLevel;
   }
-  Opts.OptimizationLevel = OptLevel;
 
   // We must always run at least the always inlining pass.
   Opts.setInlining(
@@ -312,7 +320,8 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
 
   if (Args.hasArg(OPT_gline_tables_only)) {
     Opts.setDebugInfo(CodeGenOptions::DebugLineTablesOnly);
-  } else if (Args.hasArg(OPT_g_Flag)) {
+  } else if (Args.hasArg(OPT_g_Flag) || Args.hasArg(OPT_gdwarf_2) ||
+             Args.hasArg(OPT_gdwarf_3) || Args.hasArg(OPT_gdwarf_4)) {
     if (Args.hasFlag(OPT_flimit_debug_info, OPT_fno_limit_debug_info, true))
       Opts.setDebugInfo(CodeGenOptions::LimitedDebugInfo);
     else
@@ -320,6 +329,15 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
   }
   Opts.DebugColumnInfo = Args.hasArg(OPT_dwarf_column_info);
   Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
+  if (Args.hasArg(OPT_gdwarf_2))
+    Opts.DwarfVersion = 2;
+  else if (Args.hasArg(OPT_gdwarf_3))
+    Opts.DwarfVersion = 3;
+  else if (Args.hasArg(OPT_gdwarf_4))
+    Opts.DwarfVersion = 4;
+  else if (Opts.getDebugInfo() != CodeGenOptions::NoDebugInfo)
+    // Default Dwarf version is 4 if we are generating debug information.
+    Opts.DwarfVersion = 4;
 
   Opts.DisableLLVMOpts = Args.hasArg(OPT_disable_llvm_optzns);
   Opts.DisableRedZone = Args.hasArg(OPT_disable_red_zone);
@@ -327,7 +345,7 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
   Opts.UseRegisterSizedBitfieldAccess = Args.hasArg(
     OPT_fuse_register_sized_bitfield_access);
   Opts.RelaxedAliasing = Args.hasArg(OPT_relaxed_aliasing);
-  Opts.StructPathTBAA = Args.hasArg(OPT_struct_path_tbaa);
+  Opts.StructPathTBAA = !Args.hasArg(OPT_no_struct_path_tbaa);
   Opts.DwarfDebugFlags = Args.getLastArgValue(OPT_dwarf_debug_flags);
   Opts.MergeAllConstants = !Args.hasArg(OPT_fno_merge_all_constants);
   Opts.NoCommon = Args.hasArg(OPT_fno_common);
@@ -335,10 +353,13 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
   Opts.OptimizeSize = getOptimizationLevelSize(Args);
   Opts.SimplifyLibCalls = !(Args.hasArg(OPT_fno_builtin) ||
                             Args.hasArg(OPT_ffreestanding));
-  Opts.UnrollLoops = Args.hasArg(OPT_funroll_loops) ||
-                     (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize);
+  Opts.UnrollLoops =
+      Args.hasFlag(OPT_funroll_loops, OPT_fno_unroll_loops,
+                   (Opts.OptimizationLevel > 1 && !Opts.OptimizeSize));
+  Opts.RerollLoops = Args.hasArg(OPT_freroll_loops);
 
   Opts.Autolink = !Args.hasArg(OPT_fno_autolink);
+  Opts.SampleProfileFile = Args.getLastArgValue(OPT_fprofile_sample_use_EQ);
   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
   Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
   Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
@@ -347,6 +368,7 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
   Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
   Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
+  Opts.DisableFree = Args.hasArg(OPT_disable_free);
   Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
   Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
   Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
@@ -360,7 +382,7 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
                        Args.hasArg(OPT_cl_fast_relaxed_math));
   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
   Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
-  Opts.NumRegisterParameters = Args.getLastArgIntValue(OPT_mregparm, 0, Diags);
+  Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
   Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
   Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
   Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
@@ -379,8 +401,14 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
   Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
   Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
 
-  Opts.FunctionSections = Args.hasArg(OPT_ffunction_sections);
-  Opts.DataSections = Args.hasArg(OPT_fdata_sections);
+  Opts.FunctionSections = Args.hasFlag(OPT_ffunction_sections,
+                                       OPT_fno_function_sections, false);
+  Opts.DataSections = Args.hasFlag(OPT_fdata_sections,
+                                   OPT_fno_data_sections, false);
+
+  Opts.VectorizeBB = Args.hasArg(OPT_vectorize_slp_aggressive);
+  Opts.VectorizeLoop = Args.hasArg(OPT_vectorize_loops);
+  Opts.VectorizeSLP = Args.hasArg(OPT_vectorize_slp);
 
   Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
@@ -419,7 +447,7 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
   Opts.SanitizeUndefinedTrapOnError =
     Args.hasArg(OPT_fsanitize_undefined_trap_on_error);
   Opts.SSPBufferSize =
-    Args.getLastArgIntValue(OPT_stack_protector_buffer_size, 8, Diags);
+      getLastArgIntValue(Args, OPT_stack_protector_buffer_size, 8, Diags);
   Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);
   if (Arg *A = Args.getLastArg(OPT_mstack_alignment)) {
     StringRef Val = A->getValue();
@@ -472,6 +500,17 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
       Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args) << Val;
   }
 
+  if (Arg *A = Args.getLastArg(OPT_fpcc_struct_return, OPT_freg_struct_return)) {
+    if (A->getOption().matches(OPT_fpcc_struct_return)) {
+      Opts.setStructReturnConvention(CodeGenOptions::SRCK_OnStack);
+    } else {
+      assert(A->getOption().matches(OPT_freg_struct_return));
+      Opts.setStructReturnConvention(CodeGenOptions::SRCK_InRegs);
+    }
+  }
+
+  Opts.DependentLibraries = Args.getAllArgValues(OPT_dependent_lib);
+
   return Success;
 }
 
@@ -485,6 +524,7 @@ static void ParseDependencyOutputArgs(DependencyOutputOptions &Opts,
   Opts.ShowHeaderIncludes = Args.hasArg(OPT_H);
   Opts.HeaderIncludeOutputFile = Args.getLastArgValue(OPT_header_include_file);
   Opts.AddMissingHeaderDeps = Args.hasArg(OPT_MG);
+  Opts.PrintShowIncludes = Args.hasArg(OPT_show_includes);
   Opts.DOTOutputFile = Args.getLastArgValue(OPT_dependency_dot);
 }
 
@@ -509,6 +549,8 @@ bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
 
+  llvm::sys::Process::UseANSIEscapeCodes(Args.hasArg(OPT_fansi_escape_codes));
+
   // Default behavior is to not to show note include stacks.
   Opts.ShowNoteIncludeStack = false;
   if (Arg *A = Args.getLastArg(OPT_fdiagnostics_show_note_include_stack,
@@ -552,7 +594,10 @@ bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
     Opts.setFormat(DiagnosticOptions::Clang);
   else if (Format == "msvc")
     Opts.setFormat(DiagnosticOptions::Msvc);
-  else if (Format == "vi")
+  else if (Format == "msvc-fallback") {
+    Opts.setFormat(DiagnosticOptions::Msvc);
+    Opts.CLFallbackMode = true;
+  } else if (Format == "vi")
     Opts.setFormat(DiagnosticOptions::Vi);
   else {
     Success = false;
@@ -568,19 +613,17 @@ bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
   Opts.VerifyDiagnostics = Args.hasArg(OPT_verify);
   Opts.ElideType = !Args.hasArg(OPT_fno_elide_type);
   Opts.ShowTemplateTree = Args.hasArg(OPT_fdiagnostics_show_template_tree);
-  Opts.ErrorLimit = Args.getLastArgIntValue(OPT_ferror_limit, 0, Diags);
-  Opts.MacroBacktraceLimit
-    = Args.getLastArgIntValue(OPT_fmacro_backtrace_limit,
+  Opts.ErrorLimit = getLastArgIntValue(Args, OPT_ferror_limit, 0, Diags);
+  Opts.MacroBacktraceLimit =
+      getLastArgIntValue(Args, OPT_fmacro_backtrace_limit,
                          DiagnosticOptions::DefaultMacroBacktraceLimit, Diags);
-  Opts.TemplateBacktraceLimit
-    = Args.getLastArgIntValue(OPT_ftemplate_backtrace_limit,
-                         DiagnosticOptions::DefaultTemplateBacktraceLimit,
-                         Diags);
-  Opts.ConstexprBacktraceLimit
-    = Args.getLastArgIntValue(OPT_fconstexpr_backtrace_limit,
-                         DiagnosticOptions::DefaultConstexprBacktraceLimit,
-                         Diags);
-  Opts.TabStop = Args.getLastArgIntValue(OPT_ftabstop,
+  Opts.TemplateBacktraceLimit = getLastArgIntValue(
+      Args, OPT_ftemplate_backtrace_limit,
+      DiagnosticOptions::DefaultTemplateBacktraceLimit, Diags);
+  Opts.ConstexprBacktraceLimit = getLastArgIntValue(
+      Args, OPT_fconstexpr_backtrace_limit,
+      DiagnosticOptions::DefaultConstexprBacktraceLimit, Diags);
+  Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
                                     DiagnosticOptions::DefaultTabStop, Diags);
   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
     Opts.TabStop = DiagnosticOptions::DefaultTabStop;
@@ -588,7 +631,7 @@ bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
       Diags->Report(diag::warn_ignoring_ftabstop_value)
       << Opts.TabStop << DiagnosticOptions::DefaultTabStop;
   }
-  Opts.MessageLength = Args.getLastArgIntValue(OPT_fmessage_length, 0, Diags);
+  Opts.MessageLength = getLastArgIntValue(Args, OPT_fmessage_length, 0, Diags);
   addWarningArgs(Args, Opts.Warnings);
 
   return Success;
@@ -610,8 +653,6 @@ static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
       Opts.ProgramAction = frontend::ASTDeclList; break;
     case OPT_ast_dump:
       Opts.ProgramAction = frontend::ASTDump; break;
-    case OPT_ast_dump_xml:
-      Opts.ProgramAction = frontend::ASTDumpXML; break;
     case OPT_ast_print:
       Opts.ProgramAction = frontend::ASTPrint; break;
     case OPT_ast_view:
@@ -717,6 +758,7 @@ static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
   Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
   Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
   Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
+  Opts.ASTDumpLookups = Args.hasArg(OPT_ast_dump_lookups);
   Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
   Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
   
@@ -758,6 +800,30 @@ static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
   if (Args.hasArg(OPT_objcmt_migrate_subscripting))
     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
+  if (Args.hasArg(OPT_objcmt_migrate_property))
+    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Property;
+  if (Args.hasArg(OPT_objcmt_migrate_readonly_property))
+    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadonlyProperty;
+  if (Args.hasArg(OPT_objcmt_migrate_readwrite_property))
+    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReadwriteProperty;
+  if (Args.hasArg(OPT_objcmt_migrate_annotation))
+    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Annotation;
+  if (Args.hasArg(OPT_objcmt_returns_innerpointer_property))
+    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ReturnsInnerPointerProperty;
+  if (Args.hasArg(OPT_objcmt_migrate_instancetype))
+    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Instancetype;
+  if (Args.hasArg(OPT_objcmt_migrate_nsmacros))
+    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsMacros;
+  if (Args.hasArg(OPT_objcmt_migrate_protocol_conformance))
+    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_ProtocolConformance;
+  if (Args.hasArg(OPT_objcmt_atomic_property))
+    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_AtomicProperty;
+  if (Args.hasArg(OPT_objcmt_ns_nonatomic_iosonly))
+    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_NsAtomicIOSOnlyProperty;
+  if (Args.hasArg(OPT_objcmt_migrate_all))
+    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_MigrateDecls;
+
+  Opts.ObjCMTWhiteListPath = Args.getLastArgValue(OPT_objcmt_white_list_dir_path);
 
   if (Opts.ARCMTAction != FrontendOptions::ARCMT_None &&
       Opts.ObjCMTAction != FrontendOptions::ObjCMT_None) {
@@ -816,16 +882,14 @@ static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
 
 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
                                                  void *MainAddr) {
-  llvm::sys::Path P = llvm::sys::Path::GetMainExecutable(Argv0, MainAddr);
+  SmallString<128> P(llvm::sys::fs::getMainExecutable(Argv0, MainAddr));
 
-  if (!P.isEmpty()) {
-    P.eraseComponent();  // Remove /clang from foo/bin/clang
-    P.eraseComponent();  // Remove /bin   from foo/bin
+  if (!P.empty()) {
+    llvm::sys::path::remove_filename(P); // Remove /clang from foo/bin/clang
+    llvm::sys::path::remove_filename(P); // Remove /bin   from foo/bin
 
     // Get foo/lib/clang/<version>/include
-    P.appendComponent("lib");
-    P.appendComponent("clang");
-    P.appendComponent(CLANG_VERSION_STRING);
+    llvm::sys::path::append(P, "lib", "clang", CLANG_VERSION_STRING);
   }
 
   return P.str();
@@ -843,15 +907,21 @@ static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
   Opts.ResourceDir = Args.getLastArgValue(OPT_resource_dir);
   Opts.ModuleCachePath = Args.getLastArgValue(OPT_fmodules_cache_path);
   Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
-  Opts.ModuleCachePruneInterval
-    = Args.getLastArgIntValue(OPT_fmodules_prune_interval, 7*24*60*60);
-  Opts.ModuleCachePruneAfter
-    = Args.getLastArgIntValue(OPT_fmodules_prune_after, 31*24*60*60);
+  // -fmodules implies -fmodule-maps
+  Opts.ModuleMaps = Args.hasArg(OPT_fmodule_maps) || Args.hasArg(OPT_fmodules);
+  Opts.ModuleCachePruneInterval =
+      getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
+  Opts.ModuleCachePruneAfter =
+      getLastArgIntValue(Args, OPT_fmodules_prune_after, 31 * 24 * 60 * 60);
   for (arg_iterator it = Args.filtered_begin(OPT_fmodules_ignore_macro),
-       ie = Args.filtered_end(); it != ie; ++it) {
+                    ie = Args.filtered_end();
+       it != ie; ++it) {
     StringRef MacroDef = (*it)->getValue();
     Opts.ModulesIgnoreMacros.insert(MacroDef.split('=').first);
   }
+  std::vector<std::string> ModuleMapFiles =
+      Args.getAllArgValues(OPT_fmodule_map_file);
+  Opts.ModuleMapFiles.insert(ModuleMapFiles.begin(), ModuleMapFiles.end());
 
   // Add -I..., -F..., and -index-header-map options in order.
   bool IsIndexHeaderMap = false;
@@ -1032,6 +1102,9 @@ void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
   Opts.Trigraphs = !Opts.GNUMode;
 
   Opts.DollarIdents = !Opts.AsmPreprocessor;
+
+  // C++1y onwards has sized global deallocation functions.
+  Opts.SizedDeallocation = Opts.CPlusPlus1y;
 }
 
 /// Attempt to parse a visibility value out of the given argument.
@@ -1157,6 +1230,10 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
 
     if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
       Opts.ObjCInferRelatedResultType = 0;
+    
+    if (Args.hasArg(OPT_fobjc_subscripting_legacy_runtime))
+      Opts.ObjCSubscriptingLegacyRuntime =
+        (Opts.ObjCRuntime.getKind() == ObjCRuntime::FragileMacOSX);
   }
     
   if (Args.hasArg(OPT_fgnu89_inline))
@@ -1217,7 +1294,7 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
     = Args.hasArg(OPT_fms_extensions) || Args.hasArg(OPT_fms_compatibility);
   Opts.MicrosoftMode = Args.hasArg(OPT_fms_compatibility);
   Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
-  Opts.MSCVersion = Args.getLastArgIntValue(OPT_fmsc_version, 0, Diags);
+  Opts.MSCVersion = getLastArgIntValue(Args, OPT_fmsc_version, 0, Diags);
   Opts.Borland = Args.hasArg(OPT_fborland_extensions);
   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
   Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
@@ -1236,37 +1313,44 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
   Opts.Blocks = Args.hasArg(OPT_fblocks);
   Opts.BlocksRuntimeOptional = Args.hasArg(OPT_fblocks_runtime_optional);
   Opts.Modules = Args.hasArg(OPT_fmodules);
-  Opts.CharIsSigned = !Args.hasArg(OPT_fno_signed_char);
+  Opts.ModulesDeclUse = Args.hasArg(OPT_fmodules_decluse);
+  Opts.CharIsSigned = Opts.OpenCL || !Args.hasArg(OPT_fno_signed_char);
   Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
   Opts.ShortWChar = Args.hasArg(OPT_fshort_wchar);
   Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
   Opts.FormatExtensions = Args.hasArg(OPT_fformat_extensions);
   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
+  Opts.NoMathBuiltin = Args.hasArg(OPT_fno_math_builtin);
   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
+  Opts.SizedDeallocation |= Args.hasArg(OPT_fsized_deallocation);
   Opts.HeinousExtensions = Args.hasArg(OPT_fheinous_gnu_extensions);
   Opts.AccessControl = !Args.hasArg(OPT_fno_access_control);
   Opts.ElideConstructors = !Args.hasArg(OPT_fno_elide_constructors);
-  Opts.MathErrno = Args.hasArg(OPT_fmath_errno);
-  Opts.InstantiationDepth = Args.getLastArgIntValue(OPT_ftemplate_depth, 256,
-                                                    Diags);
-  Opts.ConstexprCallDepth = Args.getLastArgIntValue(OPT_fconstexpr_depth, 512,
-                                                    Diags);
-  Opts.BracketDepth = Args.getLastArgIntValue(OPT_fbracket_depth, 256, Diags);
+  Opts.MathErrno = !Opts.OpenCL && Args.hasArg(OPT_fmath_errno);
+  Opts.InstantiationDepth =
+      getLastArgIntValue(Args, OPT_ftemplate_depth, 256, Diags);
+  Opts.ArrowDepth =
+      getLastArgIntValue(Args, OPT_foperator_arrow_depth, 256, Diags);
+  Opts.ConstexprCallDepth =
+      getLastArgIntValue(Args, OPT_fconstexpr_depth, 512, Diags);
+  Opts.ConstexprStepLimit =
+      getLastArgIntValue(Args, OPT_fconstexpr_steps, 1048576, Diags);
+  Opts.BracketDepth = getLastArgIntValue(Args, OPT_fbracket_depth, 256, Diags);
   Opts.DelayedTemplateParsing = Args.hasArg(OPT_fdelayed_template_parsing);
-  Opts.NumLargeByValueCopy = Args.getLastArgIntValue(OPT_Wlarge_by_value_copy_EQ,
-                                                    0, Diags);
+  Opts.NumLargeByValueCopy =
+      getLastArgIntValue(Args, OPT_Wlarge_by_value_copy_EQ, 0, Diags);
   Opts.MSBitfields = Args.hasArg(OPT_mms_bitfields);
   Opts.ObjCConstantStringClass =
     Args.getLastArgValue(OPT_fconstant_string_class);
   Opts.ObjCDefaultSynthProperties =
-    Args.hasArg(OPT_fobjc_default_synthesize_properties);
+    !Args.hasArg(OPT_disable_objc_default_synthesize_properties);
   Opts.EncodeExtendedBlockSig =
     Args.hasArg(OPT_fencode_extended_block_signature);
   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
-  Opts.PackStruct = Args.getLastArgIntValue(OPT_fpack_struct_EQ, 0, Diags);
-  Opts.PICLevel = Args.getLastArgIntValue(OPT_pic_level, 0, Diags);
-  Opts.PIELevel = Args.getLastArgIntValue(OPT_pie_level, 0, Diags);
+  Opts.PackStruct = getLastArgIntValue(Args, OPT_fpack_struct_EQ, 0, Diags);
+  Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
+  Opts.PIELevel = getLastArgIntValue(Args, OPT_pie_level, 0, Diags);
   Opts.Static = Args.hasArg(OPT_static_define);
   Opts.DumpRecordLayoutsSimple = Args.hasArg(OPT_fdump_record_layouts_simple);
   Opts.DumpRecordLayouts = Opts.DumpRecordLayoutsSimple 
@@ -1286,6 +1370,28 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
   Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
   Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
 
+  if (Arg *A = Args.getLastArg(OPT_faddress_space_map_mangling_EQ)) {
+    switch (llvm::StringSwitch<unsigned>(A->getValue())
+      .Case("target", LangOptions::ASMM_Target)
+      .Case("no", LangOptions::ASMM_Off)
+      .Case("yes", LangOptions::ASMM_On)
+      .Default(255)) {
+    default:
+      Diags.Report(diag::err_drv_invalid_value) 
+        << "-faddress-space-map-mangling=" << A->getValue();
+      break;
+    case LangOptions::ASMM_Target:
+      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Target);
+      break;
+    case LangOptions::ASMM_On:
+      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_On);
+      break;
+    case LangOptions::ASMM_Off:
+      Opts.setAddressSpaceMapMangling(LangOptions::ASMM_Off);
+      break;
+    }
+  }
+
   // Check if -fopenmp is specified.
   Opts.OpenMP = Args.hasArg(OPT_fopenmp);
 
@@ -1311,7 +1417,7 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
   Opts.RetainCommentsFromSystemHeaders =
       Args.hasArg(OPT_fretain_comments_from_system_headers);
 
-  unsigned SSP = Args.getLastArgIntValue(OPT_stack_protector, 0, Diags);
+  unsigned SSP = getLastArgIntValue(Args, OPT_stack_protector, 0, Diags);
   switch (SSP) {
   default:
     Diags.Report(diag::err_drv_invalid_value)
@@ -1455,7 +1561,6 @@ static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts,
   switch (Action) {
   case frontend::ASTDeclList:
   case frontend::ASTDump:
-  case frontend::ASTDumpXML:
   case frontend::ASTPrint:
   case frontend::ASTView:
   case frontend::EmitAssembly:
@@ -1503,6 +1608,7 @@ static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {
   Opts.ABI = Args.getLastArgValue(OPT_target_abi);
   Opts.CXXABI = Args.getLastArgValue(OPT_cxx_abi);
   Opts.CPU = Args.getLastArgValue(OPT_target_cpu);
+  Opts.FPMath = Args.getLastArgValue(OPT_mfpmath);
   Opts.FeaturesAsWritten = Args.getAllArgValues(OPT_target_feature);
   Opts.LinkerVersion = Args.getLastArgValue(OPT_target_linker_version);
   Opts.Triple = llvm::Triple::normalize(Args.getLastArgValue(OPT_triple));
@@ -1522,9 +1628,11 @@ bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
 
   // Parse the arguments.
   OwningPtr<OptTable> Opts(createDriverOptTable());
+  const unsigned IncludedFlagsBitmask = options::CC1Option;
   unsigned MissingArgIndex, MissingArgCount;
   OwningPtr<InputArgList> Args(
-    Opts->ParseArgs(ArgBegin, ArgEnd,MissingArgIndex, MissingArgCount));
+    Opts->ParseArgs(ArgBegin, ArgEnd, MissingArgIndex, MissingArgCount,
+                    IncludedFlagsBitmask));
 
   // Check for missing argument error.
   if (MissingArgCount) {
@@ -1540,15 +1648,6 @@ bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
     Success = false;
   }
 
-  // Issue errors on arguments that are not valid for CC1.
-  for (ArgList::iterator I = Args->begin(), E = Args->end();
-       I != E; ++I) {
-    if (!(*I)->getOption().hasFlag(options::CC1Option)) {
-      Diags.Report(diag::err_drv_unknown_argument) << (*I)->getAsString(*Args);
-      Success = false;
-    }
-  }
-
   Success = ParseAnalyzerArgs(*Res.getAnalyzerOpts(), *Args, Diags) && Success;
   Success = ParseMigratorArgs(Res.getMigratorOpts(), *Args) && Success;
   ParseDependencyOutputArgs(Res.getDependencyOutputOpts(), *Args);
@@ -1688,7 +1787,8 @@ std::string CompilerInvocation::getModuleHash() const {
                       hsOpts.UseStandardCXXIncludes,
                       hsOpts.UseLibcxx);
 
-  // Darwin-specific hack: if we have a sysroot, use the contents of
+  // Darwin-specific hack: if we have a sysroot, use the contents and
+  // modification time of
   //   $sysroot/System/Library/CoreServices/SystemVersion.plist
   // as part of the module hash.
   if (!hsOpts.Sysroot.empty()) {
@@ -1699,10 +1799,31 @@ std::string CompilerInvocation::getModuleHash() const {
     llvm::sys::path::append(systemVersionFile, "Library");
     llvm::sys::path::append(systemVersionFile, "CoreServices");
     llvm::sys::path::append(systemVersionFile, "SystemVersion.plist");
-    if (!llvm::MemoryBuffer::getFile(systemVersionFile, buffer)) {
+    if (!llvm::MemoryBuffer::getFile(systemVersionFile.str(), buffer)) {
       code = hash_combine(code, buffer.get()->getBuffer());
+
+      struct stat statBuf;
+      if (stat(systemVersionFile.c_str(), &statBuf) == 0)
+        code = hash_combine(code, statBuf.st_mtime);
     }
   }
 
   return llvm::APInt(64, code).toString(36, /*Signed=*/false);
 }
+
+namespace clang {
+
+// Declared in clang/Frontend/Utils.h.
+int getLastArgIntValue(const ArgList &Args, OptSpecifier Id, int Default,
+                       DiagnosticsEngine *Diags) {
+  int Res = Default;
+  if (Arg *A = Args.getLastArg(Id)) {
+    if (StringRef(A->getValue()).getAsInteger(10, Res)) {
+      if (Diags)
+        Diags->Report(diag::err_drv_invalid_int_value) << A->getAsString(Args)
+                                                       << A->getValue();
+    }
+  }
+  return Res;
+}
+}