Update clang, llvm, lld, lldb, compiler-rt and libc++ to 4.0.0 release:

MFC r309142 (by emaste):

Add WITH_LLD_AS_LD build knob

If set it installs LLD as /usr/bin/ld.  LLD (as of version 3.9) is not
capable of linking the world and kernel, but can self-host and link many
substantial applications. GNU ld continues to be used for the world and
kernel build, regardless of how this knob is set.

It is on by default for arm64, and off for all other CPU architectures.

Sponsored by:	The FreeBSD Foundation

MFC r310840:

Reapply 310775, now it also builds correctly if lldb is disabled:

Move llvm-objdump from CLANG_EXTRAS to installed by default

We currently install three tools from binutils 2.17.50: as, ld, and
objdump. Work is underway to migrate to a permissively-licensed
tool-chain, with one goal being the retirement of binutils 2.17.50.

LLVM's llvm-objdump is intended to be compatible with GNU objdump
although it is currently missing some options and may have formatting
differences. Enable it by default for testing and further investigation.
It may later be changed to install as /usr/bin/objdump, it becomes a
fully viable replacement.

Reviewed by:	emaste
Differential Revision:	https://reviews.freebsd.org/D8879

MFC r312855 (by emaste):

Rename LLD_AS_LD to LLD_IS_LD, for consistency with CLANG_IS_CC

Reported by:	Dan McGregor <dan.mcgregor usask.ca>

MFC r313559 | glebius | 2017-02-10 18:34:48 +0100 (Fri, 10 Feb 2017) | 5 lines

Don't check struct rtentry on FreeBSD, it is an internal kernel structure.
On other systems it may be API structure for SIOCADDRT/SIOCDELRT.

Reviewed by:	emaste, dim

MFC r314152 (by jkim):

Remove an assembler flag, which is redundant since r309124.  The upstream
took care of it by introducing a macro NO_EXEC_STACK_DIRECTIVE.

http://llvm.org/viewvc/llvm-project?rev=273500&view=rev

Reviewed by:	dim

MFC r314564:

Upgrade our copies of clang, llvm, lld, lldb, compiler-rt and libc++ to
4.0.0 (branches/release_40 296509).  The release will follow soon.

Please note that from 3.5.0 onwards, clang, llvm and lldb require C++11
support to build; see UPDATING for more information.

Also note that as of 4.0.0, lld should be able to link the base system
on amd64 and aarch64.  See the WITH_LLD_IS_LLD setting in src.conf(5).
Though please be aware that this is work in progress.

Release notes for llvm, clang and lld will be available here:
<http://releases.llvm.org/4.0.0/docs/ReleaseNotes.html>
<http://releases.llvm.org/4.0.0/tools/clang/docs/ReleaseNotes.html>
<http://releases.llvm.org/4.0.0/tools/lld/docs/ReleaseNotes.html>

Thanks to Ed Maste, Jan Beich, Antoine Brodin and Eric Fiselier for
their help.

Relnotes:	yes
Exp-run:	antoine
PR:		215969, 216008

MFC r314708:

For now, revert r287232 from upstream llvm trunk (by Daniil Fukalov):

  [SCEV] limit recursion depth of CompareSCEVComplexity

  Summary:
  CompareSCEVComplexity goes too deep (50+ on a quite a big unrolled
  loop) and runs almost infinite time.

  Added cache of "equal" SCEV pairs to earlier cutoff of further
  estimation. Recursion depth limit was also introduced as a parameter.

  Reviewers: sanjoy

  Subscribers: mzolotukhin, tstellarAMD, llvm-commits

  Differential Revision: https://reviews.llvm.org/D26389

This commit is the cause of excessive compile times on skein_block.c
(and possibly other files) during kernel builds on amd64.

We never saw the problematic behavior described in this upstream commit,
so for now it is better to revert it.  An upstream bug has been filed
here: https://bugs.llvm.org/show_bug.cgi?id=32142

Reported by:	mjg

MFC r314795:

Reapply r287232 from upstream llvm trunk (by Daniil Fukalov):

  [SCEV] limit recursion depth of CompareSCEVComplexity

  Summary:
  CompareSCEVComplexity goes too deep (50+ on a quite a big unrolled
  loop) and runs almost infinite time.

  Added cache of "equal" SCEV pairs to earlier cutoff of further
  estimation. Recursion depth limit was also introduced as a parameter.

  Reviewers: sanjoy

  Subscribers: mzolotukhin, tstellarAMD, llvm-commits

  Differential Revision: https://reviews.llvm.org/D26389

Pull in r296992 from upstream llvm trunk (by Sanjoy Das):

  [SCEV] Decrease the recursion threshold for CompareValueComplexity

  Fixes PR32142.

  r287232 accidentally increased the recursion threshold for
  CompareValueComplexity from 2 to 32.  This change reverses that
  change by introducing a separate flag for CompareValueComplexity's
  threshold.

The latter revision fixes the excessive compile times for skein_block.c.

MFC r314907 | mmel | 2017-03-08 12:40:27 +0100 (Wed, 08 Mar 2017) | 7 lines

Unbreak ARMv6 world.

The new compiler_rt library imported with clang 4.0.0 have several fatal
issues (non-functional __udivsi3 for example) with ARM specific instrict
functions. As temporary workaround, until upstream solve these problems,
disable all thumb[1][2] related feature.

MFC r315016:

Update clang, llvm, lld, lldb, compiler-rt and libc++ to 4.0.0 release.
We were already very close to the last release candidate, so this is a
pretty minor update.

Relnotes:	yes

MFC r316005:

Revert r314907, and pull in r298713 from upstream compiler-rt trunk (by
Weiming Zhao):

  builtins: Select correct code fragments when compiling for Thumb1/Thum2/ARM ISA.

  Summary:
  Value of __ARM_ARCH_ISA_THUMB isn't based on the actual compilation
  mode (-mthumb, -marm), it reflect's capability of given CPU.

  Due to this:
   - use  __tbumb__ and __thumb2__ insteand of __ARM_ARCH_ISA_THUMB
   - use '.thumb' directive consistently  in all affected files
   - decorate all thumb functions using
     DEFINE_COMPILERRT_THUMB_FUNCTION()

  ---------
  Note: This patch doesn't fix broken Thumb1 variant of __udivsi3 !

  Reviewers: weimingz, rengolin, compnerd

  Subscribers: aemerson, dim

  Differential Revision: https://reviews.llvm.org/D30938

Discussed with:	mmel

6 files changed, 77 insertions, 95 deletions

diff --git a/contrib/llvm/lib/ExecutionEngine/Orc/IndirectionUtils.cpp b/contrib/llvm/lib/ExecutionEngine/Orc/IndirectionUtils.cpp
index 6f7c29f..711b887 100644
--- a/contrib/llvm/lib/ExecutionEngine/Orc/IndirectionUtils.cpp
+++ b/contrib/llvm/lib/ExecutionEngine/Orc/IndirectionUtils.cpp
@@ -24,7 +24,7 @@ void IndirectStubsManager::anchor() {}
 
 std::unique_ptr<JITCompileCallbackManager>
 createLocalCompileCallbackManager(const Triple &T,
-                                  TargetAddress ErrorHandlerAddress) {
+                                  JITTargetAddress ErrorHandlerAddress) {
   switch (T.getArch()) {
     default: return nullptr;
 
@@ -71,7 +71,7 @@ createLocalIndirectStubsManagerBuilder(const Triple &T) {
   }
 }
 
-Constant* createIRTypedAddress(FunctionType &FT, TargetAddress Addr) {
+Constant* createIRTypedAddress(FunctionType &FT, JITTargetAddress Addr) {
   Constant *AddrIntVal =
     ConstantInt::get(Type::getInt64Ty(FT.getContext()), Addr);
   Constant *AddrPtrVal =
@@ -241,5 +241,14 @@ GlobalAlias* cloneGlobalAliasDecl(Module &Dst, const GlobalAlias &OrigA,
   return NewA;
 }
 
+void cloneModuleFlagsMetadata(Module &Dst, const Module &Src,
+                              ValueToValueMapTy &VMap) {
+  auto *MFs = Src.getModuleFlagsMetadata();
+  if (!MFs)
+    return;
+  for (auto *MF : MFs->operands())
+    Dst.addModuleFlag(MapMetadata(MF, VMap));
+}
+
 } // End namespace orc.
 } // End namespace llvm.
diff --git a/contrib/llvm/lib/ExecutionEngine/Orc/NullResolver.cpp b/contrib/llvm/lib/ExecutionEngine/Orc/NullResolver.cpp
index 57666a9..8f2d6fd 100644
--- a/contrib/llvm/lib/ExecutionEngine/Orc/NullResolver.cpp
+++ b/contrib/llvm/lib/ExecutionEngine/Orc/NullResolver.cpp
@@ -14,12 +14,11 @@
 namespace llvm {
 namespace orc {
 
-RuntimeDyld::SymbolInfo NullResolver::findSymbol(const std::string &Name) {
+JITSymbol NullResolver::findSymbol(const std::string &Name) {
   llvm_unreachable("Unexpected cross-object symbol reference");
 }
 
-RuntimeDyld::SymbolInfo
-NullResolver::findSymbolInLogicalDylib(const std::string &Name) {
+JITSymbol NullResolver::findSymbolInLogicalDylib(const std::string &Name) {
   llvm_unreachable("Unexpected cross-object symbol reference");
 }
 
diff --git a/contrib/llvm/lib/ExecutionEngine/Orc/OrcCBindingsStack.h b/contrib/llvm/lib/ExecutionEngine/Orc/OrcCBindingsStack.h
index 9ae9b20..a74fae7 100644
--- a/contrib/llvm/lib/ExecutionEngine/Orc/OrcCBindingsStack.h
+++ b/contrib/llvm/lib/ExecutionEngine/Orc/OrcCBindingsStack.h
@@ -44,8 +44,8 @@ private:
   class GenericHandle {
   public:
     virtual ~GenericHandle() {}
-    virtual orc::JITSymbol findSymbolIn(const std::string &Name,
-                                        bool ExportedSymbolsOnly) = 0;
+    virtual JITSymbol findSymbolIn(const std::string &Name,
+                                   bool ExportedSymbolsOnly) = 0;
     virtual void removeModule() = 0;
   };
 
@@ -54,8 +54,8 @@ private:
     GenericHandleImpl(LayerT &Layer, typename LayerT::ModuleSetHandleT Handle)
         : Layer(Layer), Handle(std::move(Handle)) {}
 
-    orc::JITSymbol findSymbolIn(const std::string &Name,
-                                bool ExportedSymbolsOnly) override {
+    JITSymbol findSymbolIn(const std::string &Name,
+                           bool ExportedSymbolsOnly) override {
       return Layer.findSymbolIn(Handle, Name, ExportedSymbolsOnly);
     }
 
@@ -109,55 +109,56 @@ public:
   }
 
   template <typename PtrTy>
-  static PtrTy fromTargetAddress(orc::TargetAddress Addr) {
+  static PtrTy fromTargetAddress(JITTargetAddress Addr) {
     return reinterpret_cast<PtrTy>(static_cast<uintptr_t>(Addr));
   }
 
-  orc::TargetAddress
+  JITTargetAddress
   createLazyCompileCallback(LLVMOrcLazyCompileCallbackFn Callback,
                             void *CallbackCtx) {
     auto CCInfo = CCMgr->getCompileCallback();
-    CCInfo.setCompileAction([=]() -> orc::TargetAddress {
+    CCInfo.setCompileAction([=]() -> JITTargetAddress {
       return Callback(wrap(this), CallbackCtx);
     });
     return CCInfo.getAddress();
   }
 
   LLVMOrcErrorCode createIndirectStub(StringRef StubName,
-                                      orc::TargetAddress Addr) {
+                                      JITTargetAddress Addr) {
     return mapError(
         IndirectStubsMgr->createStub(StubName, Addr, JITSymbolFlags::Exported));
   }
 
   LLVMOrcErrorCode setIndirectStubPointer(StringRef Name,
-                                          orc::TargetAddress Addr) {
+                                          JITTargetAddress Addr) {
     return mapError(IndirectStubsMgr->updatePointer(Name, Addr));
   }
 
-  std::unique_ptr<RuntimeDyld::SymbolResolver>
+  std::unique_ptr<JITSymbolResolver>
   createResolver(LLVMOrcSymbolResolverFn ExternalResolver,
                  void *ExternalResolverCtx) {
     return orc::createLambdaResolver(
-        [this, ExternalResolver, ExternalResolverCtx](const std::string &Name) {
+        [this, ExternalResolver, ExternalResolverCtx](const std::string &Name)
+            -> JITSymbol {
           // Search order:
           // 1. JIT'd symbols.
           // 2. Runtime overrides.
           // 3. External resolver (if present).
 
           if (auto Sym = CODLayer.findSymbol(Name, true))
-            return Sym.toRuntimeDyldSymbol();
+            return Sym;
           if (auto Sym = CXXRuntimeOverrides.searchOverrides(Name))
             return Sym;
 
           if (ExternalResolver)
-            return RuntimeDyld::SymbolInfo(
+            return JITSymbol(
                 ExternalResolver(Name.c_str(), ExternalResolverCtx),
                 llvm::JITSymbolFlags::Exported);
 
-          return RuntimeDyld::SymbolInfo(nullptr);
+          return JITSymbol(nullptr);
         },
         [](const std::string &Name) {
-          return RuntimeDyld::SymbolInfo(nullptr);
+          return JITSymbol(nullptr);
         });
   }
 
@@ -222,14 +223,14 @@ public:
     FreeHandleIndexes.push_back(H);
   }
 
-  orc::JITSymbol findSymbol(const std::string &Name, bool ExportedSymbolsOnly) {
+  JITSymbol findSymbol(const std::string &Name, bool ExportedSymbolsOnly) {
     if (auto Sym = IndirectStubsMgr->findStub(Name, ExportedSymbolsOnly))
       return Sym;
     return CODLayer.findSymbol(mangle(Name), ExportedSymbolsOnly);
   }
 
-  orc::JITSymbol findSymbolIn(ModuleHandleT H, const std::string &Name,
-                              bool ExportedSymbolsOnly) {
+  JITSymbol findSymbolIn(ModuleHandleT H, const std::string &Name,
+                         bool ExportedSymbolsOnly) {
     return GenericHandles[H]->findSymbolIn(Name, ExportedSymbolsOnly);
   }
 
diff --git a/contrib/llvm/lib/ExecutionEngine/Orc/OrcError.cpp b/contrib/llvm/lib/ExecutionEngine/Orc/OrcError.cpp
index 22f1303..c531fe3 100644
--- a/contrib/llvm/lib/ExecutionEngine/Orc/OrcError.cpp
+++ b/contrib/llvm/lib/ExecutionEngine/Orc/OrcError.cpp
@@ -25,7 +25,7 @@ namespace {
 // deal with the Error value directly, rather than converting to error_code.
 class OrcErrorCategory : public std::error_category {
 public:
-  const char *name() const LLVM_NOEXCEPT override { return "orc"; }
+  const char *name() const noexcept override { return "orc"; }
 
   std::string message(int condition) const override {
     switch (static_cast<OrcErrorCode>(condition)) {
@@ -39,10 +39,14 @@ public:
       return "Remote indirect stubs owner does not exist";
     case OrcErrorCode::RemoteIndirectStubsOwnerIdAlreadyInUse:
       return "Remote indirect stubs owner Id already in use";
+    case OrcErrorCode::RPCResponseAbandoned:
+      return "RPC response abandoned";
     case OrcErrorCode::UnexpectedRPCCall:
       return "Unexpected RPC call";
     case OrcErrorCode::UnexpectedRPCResponse:
       return "Unexpected RPC response";
+    case OrcErrorCode::UnknownRPCFunction:
+      return "Unknown RPC function";
     }
     llvm_unreachable("Unhandled error code");
   }
diff --git a/contrib/llvm/lib/ExecutionEngine/Orc/OrcMCJITReplacement.h b/contrib/llvm/lib/ExecutionEngine/Orc/OrcMCJITReplacement.h
index d108307..af70960 100644
--- a/contrib/llvm/lib/ExecutionEngine/Orc/OrcMCJITReplacement.h
+++ b/contrib/llvm/lib/ExecutionEngine/Orc/OrcMCJITReplacement.h
@@ -14,18 +14,40 @@
 #ifndef LLVM_LIB_EXECUTIONENGINE_ORC_ORCMCJITREPLACEMENT_H
 #define LLVM_LIB_EXECUTIONENGINE_ORC_ORCMCJITREPLACEMENT_H
 
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/StringRef.h"
 #include "llvm/ExecutionEngine/ExecutionEngine.h"
+#include "llvm/ExecutionEngine/GenericValue.h"
+#include "llvm/ExecutionEngine/JITSymbol.h"
+#include "llvm/ExecutionEngine/RuntimeDyld.h"
 #include "llvm/ExecutionEngine/Orc/CompileUtils.h"
 #include "llvm/ExecutionEngine/Orc/IRCompileLayer.h"
 #include "llvm/ExecutionEngine/Orc/LazyEmittingLayer.h"
 #include "llvm/ExecutionEngine/Orc/ObjectLinkingLayer.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/Mangler.h"
 #include "llvm/Object/Archive.h"
+#include "llvm/Object/Binary.h"
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Target/TargetMachine.h"
+#include <cassert>
+#include <cstddef>
+#include <cstdint>
+#include <algorithm>
+#include <map>
+#include <memory>
+#include <set>
+#include <string>
+#include <vector>
 
 namespace llvm {
 namespace orc {
 
 class OrcMCJITReplacement : public ExecutionEngine {
-
   // OrcMCJITReplacement needs to do a little extra book-keeping to ensure that
   // Orc's automatic finalization doesn't kick in earlier than MCJIT clients are
   // expecting - see finalizeMemory.
@@ -111,17 +133,18 @@ class OrcMCJITReplacement : public ExecutionEngine {
     std::shared_ptr<MCJITMemoryManager> ClientMM;
   };
 
-  class LinkingResolver : public RuntimeDyld::SymbolResolver {
+  class LinkingResolver : public JITSymbolResolver {
   public:
     LinkingResolver(OrcMCJITReplacement &M) : M(M) {}
 
-    RuntimeDyld::SymbolInfo findSymbol(const std::string &Name) override {
-      return M.findMangledSymbol(Name);
+    JITSymbol findSymbol(const std::string &Name) override {
+      return M.ClientResolver->findSymbol(Name);
     }
 
-    RuntimeDyld::SymbolInfo
-    findSymbolInLogicalDylib(const std::string &Name) override {
-      return M.ClientResolver->findSymbol(Name);
+    JITSymbol findSymbolInLogicalDylib(const std::string &Name) override {
+      if (auto Sym = M.findMangledSymbol(Name))
+        return Sym;
+      return M.ClientResolver->findSymbolInLogicalDylib(Name);
     }
 
   private:
@@ -133,7 +156,7 @@ private:
   static ExecutionEngine *
   createOrcMCJITReplacement(std::string *ErrorMsg,
                             std::shared_ptr<MCJITMemoryManager> MemMgr,
-                            std::shared_ptr<RuntimeDyld::SymbolResolver> Resolver,
+                            std::shared_ptr<JITSymbolResolver> Resolver,
                             std::unique_ptr<TargetMachine> TM) {
     return new OrcMCJITReplacement(std::move(MemMgr), std::move(Resolver),
                                    std::move(TM));
@@ -146,7 +169,7 @@ public:
 
   OrcMCJITReplacement(
       std::shared_ptr<MCJITMemoryManager> MemMgr,
-      std::shared_ptr<RuntimeDyld::SymbolResolver> ClientResolver,
+      std::shared_ptr<JITSymbolResolver> ClientResolver,
       std::unique_ptr<TargetMachine> TM)
       : ExecutionEngine(TM->createDataLayout()), TM(std::move(TM)),
         MemMgr(*this, std::move(MemMgr)), Resolver(*this),
@@ -193,7 +216,7 @@ public:
     return findSymbol(Name).getAddress();
   }
 
-  RuntimeDyld::SymbolInfo findSymbol(StringRef Name) {
+  JITSymbol findSymbol(StringRef Name) {
     return findMangledSymbol(Mangle(Name));
   }
 
@@ -242,14 +265,13 @@ public:
   }
 
 private:
-
-  RuntimeDyld::SymbolInfo findMangledSymbol(StringRef Name) {
+  JITSymbol findMangledSymbol(StringRef Name) {
     if (auto Sym = LazyEmitLayer.findSymbol(Name, false))
-      return Sym.toRuntimeDyldSymbol();
+      return Sym;
     if (auto Sym = ClientResolver->findSymbol(Name))
       return Sym;
     if (auto Sym = scanArchives(Name))
-      return Sym.toRuntimeDyldSymbol();
+      return Sym;
 
     return nullptr;
   }
@@ -305,7 +327,6 @@ private:
     }
 
   private:
-
     static const object::ObjectFile& getObject(const object::ObjectFile &Obj) {
       return Obj;
     }
@@ -322,6 +343,7 @@ private:
   class NotifyFinalizedT {
   public:
     NotifyFinalizedT(OrcMCJITReplacement &M) : M(M) {}
+
     void operator()(ObjectLinkingLayerBase::ObjSetHandleT H) {
       M.UnfinalizedSections.erase(H);
     }
@@ -346,7 +368,7 @@ private:
   std::unique_ptr<TargetMachine> TM;
   MCJITReplacementMemMgr MemMgr;
   LinkingResolver Resolver;
-  std::shared_ptr<RuntimeDyld::SymbolResolver> ClientResolver;
+  std::shared_ptr<JITSymbolResolver> ClientResolver;
   Mangler Mang;
 
   NotifyObjectLoadedT NotifyObjectLoaded;
@@ -373,7 +395,7 @@ private:
   std::vector<object::OwningBinary<object::Archive>> Archives;
 };
 
-} // End namespace orc.
-} // End namespace llvm.
+} // end namespace orc
+} // end namespace llvm
 
 #endif // LLVM_LIB_EXECUTIONENGINE_ORC_MCJITREPLACEMENT_H
diff --git a/contrib/llvm/lib/ExecutionEngine/Orc/OrcRemoteTargetRPCAPI.cpp b/contrib/llvm/lib/ExecutionEngine/Orc/OrcRemoteTargetRPCAPI.cpp
deleted file mode 100644
index d1a021a..0000000
--- a/contrib/llvm/lib/ExecutionEngine/Orc/OrcRemoteTargetRPCAPI.cpp
+++ /dev/null
@@ -1,53 +0,0 @@
-//===------- OrcRemoteTargetRPCAPI.cpp - ORC Remote API utilities ---------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/ExecutionEngine/Orc/OrcRemoteTargetRPCAPI.h"
-
-namespace llvm {
-namespace orc {
-namespace remote {
-
-#define FUNCNAME(X) \
-  case X ## Id: \
-  return #X
-
-const char *OrcRemoteTargetRPCAPI::getJITFuncIdName(JITFuncId Id) {
-  switch (Id) {
-  case InvalidId:
-    return "*** Invalid JITFuncId ***";
-  FUNCNAME(CallIntVoid);
-  FUNCNAME(CallMain);
-  FUNCNAME(CallVoidVoid);
-  FUNCNAME(CreateRemoteAllocator);
-  FUNCNAME(CreateIndirectStubsOwner);
-  FUNCNAME(DeregisterEHFrames);
-  FUNCNAME(DestroyRemoteAllocator);
-  FUNCNAME(DestroyIndirectStubsOwner);
-  FUNCNAME(EmitIndirectStubs);
-  FUNCNAME(EmitResolverBlock);
-  FUNCNAME(EmitTrampolineBlock);
-  FUNCNAME(GetSymbolAddress);
-  FUNCNAME(GetRemoteInfo);
-  FUNCNAME(ReadMem);
-  FUNCNAME(RegisterEHFrames);
-  FUNCNAME(ReserveMem);
-  FUNCNAME(RequestCompile);
-  FUNCNAME(SetProtections);
-  FUNCNAME(TerminateSession);
-  FUNCNAME(WriteMem);
-  FUNCNAME(WritePtr);
-  };
-  return nullptr;
-}
-
-#undef FUNCNAME
-
-} // end namespace remote
-} // end namespace orc
-} // end namespace llvm