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

1 files changed, 165 insertions, 229 deletions

diff --git a/contrib/llvm/tools/lldb/source/API/SBSection.cpp b/contrib/llvm/tools/lldb/source/API/SBSection.cpp
index 809eca6..8124fe9 100644
--- a/contrib/llvm/tools/lldb/source/API/SBSection.cpp
+++ b/contrib/llvm/tools/lldb/source/API/SBSection.cpp
@@ -18,282 +18,218 @@
 #include "lldb/Core/StreamString.h"
 #include "lldb/Symbol/ObjectFile.h"
 
-
 using namespace lldb;
 using namespace lldb_private;
 
+SBSection::SBSection() : m_opaque_wp() {}
 
-SBSection::SBSection () :
-    m_opaque_wp ()
-{
-}
+SBSection::SBSection(const SBSection &rhs) : m_opaque_wp(rhs.m_opaque_wp) {}
 
-SBSection::SBSection (const SBSection &rhs) :
-    m_opaque_wp (rhs.m_opaque_wp)
+SBSection::SBSection(const lldb::SectionSP &section_sp)
+    : m_opaque_wp() // Don't init with section_sp otherwise this will throw if
+                    // section_sp doesn't contain a valid Section *
 {
+  if (section_sp)
+    m_opaque_wp = section_sp;
 }
 
-
-
-SBSection::SBSection (const lldb::SectionSP &section_sp) :
-    m_opaque_wp () // Don't init with section_sp otherwise this will throw if section_sp doesn't contain a valid Section *
-{
-    if (section_sp)
-        m_opaque_wp = section_sp;
+const SBSection &SBSection::operator=(const SBSection &rhs) {
+  m_opaque_wp = rhs.m_opaque_wp;
+  return *this;
 }
 
-const SBSection &
-SBSection::operator = (const SBSection &rhs)
-{
-    m_opaque_wp = rhs.m_opaque_wp;
-    return *this;
-}
+SBSection::~SBSection() {}
 
-SBSection::~SBSection ()
-{
+bool SBSection::IsValid() const {
+  SectionSP section_sp(GetSP());
+  return section_sp && section_sp->GetModule().get() != NULL;
 }
 
-bool
-SBSection::IsValid () const
-{
-    SectionSP section_sp (GetSP());
-    return section_sp && section_sp->GetModule().get() != NULL;
+const char *SBSection::GetName() {
+  SectionSP section_sp(GetSP());
+  if (section_sp)
+    return section_sp->GetName().GetCString();
+  return NULL;
 }
 
-const char *
-SBSection::GetName ()
-{
-    SectionSP section_sp (GetSP());
-    if (section_sp)
-        return section_sp->GetName().GetCString();
-    return NULL;
+lldb::SBSection SBSection::GetParent() {
+  lldb::SBSection sb_section;
+  SectionSP section_sp(GetSP());
+  if (section_sp) {
+    SectionSP parent_section_sp(section_sp->GetParent());
+    if (parent_section_sp)
+      sb_section.SetSP(parent_section_sp);
+  }
+  return sb_section;
 }
 
-lldb::SBSection
-SBSection::GetParent()
-{
-    lldb::SBSection sb_section;
-    SectionSP section_sp (GetSP());
-    if (section_sp)
-    {
-        SectionSP parent_section_sp (section_sp->GetParent());
-        if (parent_section_sp)
-            sb_section.SetSP(parent_section_sp);
+lldb::SBSection SBSection::FindSubSection(const char *sect_name) {
+  lldb::SBSection sb_section;
+  if (sect_name) {
+    SectionSP section_sp(GetSP());
+    if (section_sp) {
+      ConstString const_sect_name(sect_name);
+      sb_section.SetSP(
+          section_sp->GetChildren().FindSectionByName(const_sect_name));
     }
-    return sb_section;    
+  }
+  return sb_section;
 }
 
-
-lldb::SBSection
-SBSection::FindSubSection (const char *sect_name)
-{
-    lldb::SBSection sb_section;
-    if (sect_name)
-    {
-        SectionSP section_sp (GetSP());
-        if (section_sp)
-        {
-            ConstString const_sect_name(sect_name);
-            sb_section.SetSP(section_sp->GetChildren ().FindSectionByName(const_sect_name));
-        }
-    }
-    return sb_section;
+size_t SBSection::GetNumSubSections() {
+  SectionSP section_sp(GetSP());
+  if (section_sp)
+    return section_sp->GetChildren().GetSize();
+  return 0;
 }
 
-size_t
-SBSection::GetNumSubSections ()
-{
-    SectionSP section_sp (GetSP());
-    if (section_sp)
-        return section_sp->GetChildren ().GetSize();
-    return 0;
+lldb::SBSection SBSection::GetSubSectionAtIndex(size_t idx) {
+  lldb::SBSection sb_section;
+  SectionSP section_sp(GetSP());
+  if (section_sp)
+    sb_section.SetSP(section_sp->GetChildren().GetSectionAtIndex(idx));
+  return sb_section;
 }
 
-lldb::SBSection
-SBSection::GetSubSectionAtIndex (size_t idx)
-{
-    lldb::SBSection sb_section;
-    SectionSP section_sp (GetSP());
-    if (section_sp)
-        sb_section.SetSP (section_sp->GetChildren ().GetSectionAtIndex(idx));
-    return sb_section;
-}
+lldb::SectionSP SBSection::GetSP() const { return m_opaque_wp.lock(); }
 
-lldb::SectionSP
-SBSection::GetSP() const
-{
-    return m_opaque_wp.lock();
+void SBSection::SetSP(const lldb::SectionSP &section_sp) {
+  m_opaque_wp = section_sp;
 }
 
-void
-SBSection::SetSP(const lldb::SectionSP &section_sp)
-{
-    m_opaque_wp = section_sp;
+lldb::addr_t SBSection::GetFileAddress() {
+  lldb::addr_t file_addr = LLDB_INVALID_ADDRESS;
+  SectionSP section_sp(GetSP());
+  if (section_sp)
+    return section_sp->GetFileAddress();
+  return file_addr;
 }
 
-lldb::addr_t
-SBSection::GetFileAddress ()
-{
-    lldb::addr_t file_addr = LLDB_INVALID_ADDRESS;
-    SectionSP section_sp (GetSP());
+lldb::addr_t SBSection::GetLoadAddress(lldb::SBTarget &sb_target) {
+  TargetSP target_sp(sb_target.GetSP());
+  if (target_sp) {
+    SectionSP section_sp(GetSP());
     if (section_sp)
-        return section_sp->GetFileAddress();
-    return file_addr;
-}
-
-lldb::addr_t
-SBSection::GetLoadAddress (lldb::SBTarget &sb_target)
-{
-    TargetSP target_sp(sb_target.GetSP());
-    if (target_sp)
-    {
-        SectionSP section_sp (GetSP());
-        if (section_sp)
-            return section_sp->GetLoadBaseAddress(target_sp.get());
+      return section_sp->GetLoadBaseAddress(target_sp.get());
+  }
+  return LLDB_INVALID_ADDRESS;
+}
+
+lldb::addr_t SBSection::GetByteSize() {
+  SectionSP section_sp(GetSP());
+  if (section_sp)
+    return section_sp->GetByteSize();
+  return 0;
+}
+
+uint64_t SBSection::GetFileOffset() {
+  SectionSP section_sp(GetSP());
+  if (section_sp) {
+    ModuleSP module_sp(section_sp->GetModule());
+    if (module_sp) {
+      ObjectFile *objfile = module_sp->GetObjectFile();
+      if (objfile)
+        return objfile->GetFileOffset() + section_sp->GetFileOffset();
     }
-    return LLDB_INVALID_ADDRESS;
-    
-}
-
-
-
-lldb::addr_t
-SBSection::GetByteSize ()
-{
-    SectionSP section_sp (GetSP());
-    if (section_sp)
-        return section_sp->GetByteSize();
-    return 0;
-}
-
-uint64_t
-SBSection::GetFileOffset ()
-{
-    SectionSP section_sp (GetSP());
-    if (section_sp)
-    {
-        ModuleSP module_sp (section_sp->GetModule());
-        if (module_sp)
-        {
-            ObjectFile *objfile = module_sp->GetObjectFile();
-            if (objfile)
-                return objfile->GetFileOffset() + section_sp->GetFileOffset();
+  }
+  return UINT64_MAX;
+}
+
+uint64_t SBSection::GetFileByteSize() {
+  SectionSP section_sp(GetSP());
+  if (section_sp)
+    return section_sp->GetFileSize();
+  return 0;
+}
+
+SBData SBSection::GetSectionData() { return GetSectionData(0, UINT64_MAX); }
+
+SBData SBSection::GetSectionData(uint64_t offset, uint64_t size) {
+  SBData sb_data;
+  SectionSP section_sp(GetSP());
+  if (section_sp) {
+    const uint64_t sect_file_size = section_sp->GetFileSize();
+    if (sect_file_size > 0) {
+      ModuleSP module_sp(section_sp->GetModule());
+      if (module_sp) {
+        ObjectFile *objfile = module_sp->GetObjectFile();
+        if (objfile) {
+          const uint64_t sect_file_offset =
+              objfile->GetFileOffset() + section_sp->GetFileOffset();
+          const uint64_t file_offset = sect_file_offset + offset;
+          uint64_t file_size = size;
+          if (file_size == UINT64_MAX) {
+            file_size = section_sp->GetByteSize();
+            if (file_size > offset)
+              file_size -= offset;
+            else
+              file_size = 0;
+          }
+          DataBufferSP data_buffer_sp(
+              objfile->GetFileSpec().ReadFileContents(file_offset, file_size));
+          if (data_buffer_sp && data_buffer_sp->GetByteSize() > 0) {
+            DataExtractorSP data_extractor_sp(
+                new DataExtractor(data_buffer_sp, objfile->GetByteOrder(),
+                                  objfile->GetAddressByteSize()));
+
+            sb_data.SetOpaque(data_extractor_sp);
+          }
         }
+      }
     }
-    return UINT64_MAX;
-}
-
-uint64_t
-SBSection::GetFileByteSize ()
-{
-    SectionSP section_sp (GetSP());
-    if (section_sp)
-        return section_sp->GetFileSize();
-    return 0;
+  }
+  return sb_data;
 }
 
-SBData
-SBSection::GetSectionData ()
-{
-    return GetSectionData (0, UINT64_MAX);
+SectionType SBSection::GetSectionType() {
+  SectionSP section_sp(GetSP());
+  if (section_sp.get())
+    return section_sp->GetType();
+  return eSectionTypeInvalid;
 }
 
-SBData
-SBSection::GetSectionData (uint64_t offset, uint64_t size)
+uint32_t
+SBSection::GetPermissions() const
 {
-    SBData sb_data;
-    SectionSP section_sp (GetSP());
+    SectionSP section_sp(GetSP());
     if (section_sp)
-    {
-        const uint64_t sect_file_size = section_sp->GetFileSize();
-        if (sect_file_size > 0)
-        {
-            ModuleSP module_sp (section_sp->GetModule());
-            if (module_sp)
-            {
-                ObjectFile *objfile = module_sp->GetObjectFile();
-                if (objfile)
-                {
-                    const uint64_t sect_file_offset = objfile->GetFileOffset() + section_sp->GetFileOffset();
-                    const uint64_t file_offset = sect_file_offset + offset;
-                    uint64_t file_size = size;
-                    if (file_size == UINT64_MAX)
-                    {
-                        file_size = section_sp->GetByteSize();
-                        if (file_size > offset)
-                            file_size -= offset;
-                        else
-                            file_size = 0;
-                    }
-                    DataBufferSP data_buffer_sp (objfile->GetFileSpec().ReadFileContents (file_offset, file_size));
-                    if (data_buffer_sp && data_buffer_sp->GetByteSize() > 0)
-                    {
-                        DataExtractorSP data_extractor_sp (new DataExtractor (data_buffer_sp, 
-                                                                              objfile->GetByteOrder(), 
-                                                                              objfile->GetAddressByteSize()));
-                        
-                        sb_data.SetOpaque (data_extractor_sp);
-                    }
-                }
-            }
-        }
-    }
-    return sb_data;
-}
-
-SectionType
-SBSection::GetSectionType ()
-{
-    SectionSP section_sp (GetSP());
-    if (section_sp.get())
-        return section_sp->GetType();
-    return eSectionTypeInvalid;
+        return section_sp->GetPermissions();
+    return 0;
 }
 
-uint32_t
-SBSection::GetTargetByteSize ()
-{
-    SectionSP section_sp (GetSP());
-    if (section_sp.get())
-        return section_sp->GetTargetByteSize();
-    return 0;
+uint32_t SBSection::GetTargetByteSize() {
+  SectionSP section_sp(GetSP());
+  if (section_sp.get())
+    return section_sp->GetTargetByteSize();
+  return 0;
 }
 
-bool
-SBSection::operator == (const SBSection &rhs)
-{
-    SectionSP lhs_section_sp (GetSP());
-    SectionSP rhs_section_sp (rhs.GetSP());
-    if (lhs_section_sp && rhs_section_sp)
-        return lhs_section_sp == rhs_section_sp;
-    return false;
+bool SBSection::operator==(const SBSection &rhs) {
+  SectionSP lhs_section_sp(GetSP());
+  SectionSP rhs_section_sp(rhs.GetSP());
+  if (lhs_section_sp && rhs_section_sp)
+    return lhs_section_sp == rhs_section_sp;
+  return false;
 }
 
-bool
-SBSection::operator != (const SBSection &rhs)
-{
-    SectionSP lhs_section_sp (GetSP());
-    SectionSP rhs_section_sp (rhs.GetSP());
-    return lhs_section_sp != rhs_section_sp;
+bool SBSection::operator!=(const SBSection &rhs) {
+  SectionSP lhs_section_sp(GetSP());
+  SectionSP rhs_section_sp(rhs.GetSP());
+  return lhs_section_sp != rhs_section_sp;
 }
 
-bool
-SBSection::GetDescription (SBStream &description)
-{
-    Stream &strm = description.ref();
+bool SBSection::GetDescription(SBStream &description) {
+  Stream &strm = description.ref();
 
-    SectionSP section_sp (GetSP());
-    if (section_sp)
-    {
-        const addr_t file_addr = section_sp->GetFileAddress();
-        strm.Printf ("[0x%16.16" PRIx64 "-0x%16.16" PRIx64 ") ", file_addr, file_addr + section_sp->GetByteSize());
-        section_sp->DumpName(&strm);
-    }
-    else
-    {
-        strm.PutCString ("No value");
-    }
+  SectionSP section_sp(GetSP());
+  if (section_sp) {
+    const addr_t file_addr = section_sp->GetFileAddress();
+    strm.Printf("[0x%16.16" PRIx64 "-0x%16.16" PRIx64 ") ", file_addr,
+                file_addr + section_sp->GetByteSize());
+    section_sp->DumpName(&strm);
+  } else {
+    strm.PutCString("No value");
+  }
 
-    return true;
+  return true;
 }
-