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, 24 insertions, 33 deletions

diff --git a/contrib/libc++/include/math.h b/contrib/libc++/include/math.h
index 2020554..fb0b608 100644
--- a/contrib/libc++/include/math.h
+++ b/contrib/libc++/include/math.h
@@ -308,10 +308,6 @@ extern "C++" {
 
 #include <type_traits>
 
-#ifdef _LIBCPP_MSVCRT
-#include "support/win32/math_win32.h"
-#endif
-
 // signbit
 
 #ifdef signbit
@@ -636,11 +632,9 @@ isunordered(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
 
 #endif  // isunordered
 
-#ifndef __sun__
-
 // abs
 
-#if !defined(_AIX)
+#if !(defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY
 float
 abs(float __lcpp_x) _NOEXCEPT {return fabsf(__lcpp_x);}
@@ -652,11 +646,11 @@ abs(double __lcpp_x) _NOEXCEPT {return fabs(__lcpp_x);}
 inline _LIBCPP_INLINE_VISIBILITY
 long double
 abs(long double __lcpp_x) _NOEXCEPT {return fabsl(__lcpp_x);}
-#endif // !defined(_AIX)
+#endif // !(defined(_AIX) || defined(__sun__))
 
 // acos
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       acos(float __lcpp_x) _NOEXCEPT       {return acosf(__lcpp_x);}
 inline _LIBCPP_INLINE_VISIBILITY long double acos(long double __lcpp_x) _NOEXCEPT {return acosl(__lcpp_x);}
 #endif
@@ -668,7 +662,7 @@ acos(_A1 __lcpp_x) _NOEXCEPT {return acos((double)__lcpp_x);}
 
 // asin
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       asin(float __lcpp_x) _NOEXCEPT       {return asinf(__lcpp_x);}
 inline _LIBCPP_INLINE_VISIBILITY long double asin(long double __lcpp_x) _NOEXCEPT {return asinl(__lcpp_x);}
 #endif
@@ -680,7 +674,7 @@ asin(_A1 __lcpp_x) _NOEXCEPT {return asin((double)__lcpp_x);}
 
 // atan
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       atan(float __lcpp_x) _NOEXCEPT       {return atanf(__lcpp_x);}
 inline _LIBCPP_INLINE_VISIBILITY long double atan(long double __lcpp_x) _NOEXCEPT {return atanl(__lcpp_x);}
 #endif
@@ -692,7 +686,7 @@ atan(_A1 __lcpp_x) _NOEXCEPT {return atan((double)__lcpp_x);}
 
 // atan2
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       atan2(float __lcpp_y, float __lcpp_x) _NOEXCEPT             {return atan2f(__lcpp_y, __lcpp_x);}
 inline _LIBCPP_INLINE_VISIBILITY long double atan2(long double __lcpp_y, long double __lcpp_x) _NOEXCEPT {return atan2l(__lcpp_y, __lcpp_x);}
 #endif
@@ -715,7 +709,7 @@ atan2(_A1 __lcpp_y, _A2 __lcpp_x) _NOEXCEPT
 
 // ceil
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       ceil(float __lcpp_x) _NOEXCEPT       {return ceilf(__lcpp_x);}
 inline _LIBCPP_INLINE_VISIBILITY long double ceil(long double __lcpp_x) _NOEXCEPT {return ceill(__lcpp_x);}
 #endif
@@ -727,7 +721,7 @@ ceil(_A1 __lcpp_x) _NOEXCEPT {return ceil((double)__lcpp_x);}
 
 // cos
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       cos(float __lcpp_x) _NOEXCEPT       {return cosf(__lcpp_x);}
 inline _LIBCPP_INLINE_VISIBILITY long double cos(long double __lcpp_x) _NOEXCEPT {return cosl(__lcpp_x);}
 #endif
@@ -739,7 +733,7 @@ cos(_A1 __lcpp_x) _NOEXCEPT {return cos((double)__lcpp_x);}
 
 // cosh
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       cosh(float __lcpp_x) _NOEXCEPT       {return coshf(__lcpp_x);}
 inline _LIBCPP_INLINE_VISIBILITY long double cosh(long double __lcpp_x) _NOEXCEPT {return coshl(__lcpp_x);}
 #endif
@@ -751,7 +745,7 @@ cosh(_A1 __lcpp_x) _NOEXCEPT {return cosh((double)__lcpp_x);}
 
 // exp
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       exp(float __lcpp_x) _NOEXCEPT       {return expf(__lcpp_x);}
 inline _LIBCPP_INLINE_VISIBILITY long double exp(long double __lcpp_x) _NOEXCEPT {return expl(__lcpp_x);}
 #endif
@@ -763,7 +757,7 @@ exp(_A1 __lcpp_x) _NOEXCEPT {return exp((double)__lcpp_x);}
 
 // fabs
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       fabs(float __lcpp_x) _NOEXCEPT       {return fabsf(__lcpp_x);}
 inline _LIBCPP_INLINE_VISIBILITY long double fabs(long double __lcpp_x) _NOEXCEPT {return fabsl(__lcpp_x);}
 #endif
@@ -775,7 +769,7 @@ fabs(_A1 __lcpp_x) _NOEXCEPT {return fabs((double)__lcpp_x);}
 
 // floor
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       floor(float __lcpp_x) _NOEXCEPT       {return floorf(__lcpp_x);}
 inline _LIBCPP_INLINE_VISIBILITY long double floor(long double __lcpp_x) _NOEXCEPT {return floorl(__lcpp_x);}
 #endif
@@ -787,7 +781,7 @@ floor(_A1 __lcpp_x) _NOEXCEPT {return floor((double)__lcpp_x);}
 
 // fmod
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       fmod(float __lcpp_x, float __lcpp_y) _NOEXCEPT             {return fmodf(__lcpp_x, __lcpp_y);}
 inline _LIBCPP_INLINE_VISIBILITY long double fmod(long double __lcpp_x, long double __lcpp_y) _NOEXCEPT {return fmodl(__lcpp_x, __lcpp_y);}
 #endif
@@ -810,7 +804,7 @@ fmod(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
 
 // frexp
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       frexp(float __lcpp_x, int* __lcpp_e) _NOEXCEPT       {return frexpf(__lcpp_x, __lcpp_e);}
 inline _LIBCPP_INLINE_VISIBILITY long double frexp(long double __lcpp_x, int* __lcpp_e) _NOEXCEPT {return frexpl(__lcpp_x, __lcpp_e);}
 #endif
@@ -822,7 +816,7 @@ frexp(_A1 __lcpp_x, int* __lcpp_e) _NOEXCEPT {return frexp((double)__lcpp_x, __l
 
 // ldexp
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       ldexp(float __lcpp_x, int __lcpp_e) _NOEXCEPT       {return ldexpf(__lcpp_x, __lcpp_e);}
 inline _LIBCPP_INLINE_VISIBILITY long double ldexp(long double __lcpp_x, int __lcpp_e) _NOEXCEPT {return ldexpl(__lcpp_x, __lcpp_e);}
 #endif
@@ -834,7 +828,7 @@ ldexp(_A1 __lcpp_x, int __lcpp_e) _NOEXCEPT {return ldexp((double)__lcpp_x, __lc
 
 // log
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       log(float __lcpp_x) _NOEXCEPT       {return logf(__lcpp_x);}
 inline _LIBCPP_INLINE_VISIBILITY long double log(long double __lcpp_x) _NOEXCEPT {return logl(__lcpp_x);}
 #endif
@@ -846,7 +840,7 @@ log(_A1 __lcpp_x) _NOEXCEPT {return log((double)__lcpp_x);}
 
 // log10
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       log10(float __lcpp_x) _NOEXCEPT       {return log10f(__lcpp_x);}
 inline _LIBCPP_INLINE_VISIBILITY long double log10(long double __lcpp_x) _NOEXCEPT {return log10l(__lcpp_x);}
 #endif
@@ -858,14 +852,14 @@ log10(_A1 __lcpp_x) _NOEXCEPT {return log10((double)__lcpp_x);}
 
 // modf
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       modf(float __lcpp_x, float* __lcpp_y) _NOEXCEPT             {return modff(__lcpp_x, __lcpp_y);}
 inline _LIBCPP_INLINE_VISIBILITY long double modf(long double __lcpp_x, long double* __lcpp_y) _NOEXCEPT {return modfl(__lcpp_x, __lcpp_y);}
 #endif
 
 // pow
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       pow(float __lcpp_x, float __lcpp_y) _NOEXCEPT             {return powf(__lcpp_x, __lcpp_y);}
 inline _LIBCPP_INLINE_VISIBILITY long double pow(long double __lcpp_x, long double __lcpp_y) _NOEXCEPT {return powl(__lcpp_x, __lcpp_y);}
 #endif
@@ -888,7 +882,7 @@ pow(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
 
 // sin
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       sin(float __lcpp_x) _NOEXCEPT       {return sinf(__lcpp_x);}
 inline _LIBCPP_INLINE_VISIBILITY long double sin(long double __lcpp_x) _NOEXCEPT {return sinl(__lcpp_x);}
 #endif
@@ -900,7 +894,7 @@ sin(_A1 __lcpp_x) _NOEXCEPT {return sin((double)__lcpp_x);}
 
 // sinh
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       sinh(float __lcpp_x) _NOEXCEPT       {return sinhf(__lcpp_x);}
 inline _LIBCPP_INLINE_VISIBILITY long double sinh(long double __lcpp_x) _NOEXCEPT {return sinhl(__lcpp_x);}
 #endif
@@ -912,21 +906,19 @@ sinh(_A1 __lcpp_x) _NOEXCEPT {return sinh((double)__lcpp_x);}
 
 // sqrt
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       sqrt(float __lcpp_x) _NOEXCEPT       {return sqrtf(__lcpp_x);}
 inline _LIBCPP_INLINE_VISIBILITY long double sqrt(long double __lcpp_x) _NOEXCEPT {return sqrtl(__lcpp_x);}
 #endif
 
-#endif // __sun__
 template <class _A1>
 inline _LIBCPP_INLINE_VISIBILITY
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
 sqrt(_A1 __lcpp_x) _NOEXCEPT {return sqrt((double)__lcpp_x);}
-#ifndef __sun__
 
 // tan
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       tan(float __lcpp_x) _NOEXCEPT       {return tanf(__lcpp_x);}
 inline _LIBCPP_INLINE_VISIBILITY long double tan(long double __lcpp_x) _NOEXCEPT {return tanl(__lcpp_x);}
 #endif
@@ -938,7 +930,7 @@ tan(_A1 __lcpp_x) _NOEXCEPT {return tan((double)__lcpp_x);}
 
 // tanh
 
-#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX))
+#if !(defined(_LIBCPP_MSVCRT) || defined(_AIX) || defined(__sun__))
 inline _LIBCPP_INLINE_VISIBILITY float       tanh(float __lcpp_x) _NOEXCEPT       {return tanhf(__lcpp_x);}
 inline _LIBCPP_INLINE_VISIBILITY long double tanh(long double __lcpp_x) _NOEXCEPT {return tanhl(__lcpp_x);}
 #endif
@@ -1410,7 +1402,6 @@ typename std::enable_if<std::is_integral<_A1>::value, double>::type
 trunc(_A1 __lcpp_x) _NOEXCEPT {return trunc((double)__lcpp_x);}
 
 #endif // !_LIBCPP_MSVCRT
-#endif // __sun__
 
 } // extern "C++"