Update build glue for llvm/clang 3.9.1.

Update build glue for clang and the llvm/clang extras.

Update llvm/clang build glue.

Update clang's Version.inc file, and regenerate various generated
configuration headers (these used to be generated by autoconf, but
upstream has deprecated autoconf in favor of CMake).

Upgrade our copies of clang and llvm to 3.7.1 release. This is a
bugfix-only release, with no new features.

Please note that from 3.5.0 onwards, clang and llvm require C++11
support to build; see U

Upgrade our copies of clang and llvm to 3.7.1 release. This is a
bugfix-only release, with no new features.

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

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Update llvm, clang and lldb to 3.7.0 release.

Update llvm/clang build glue.

Update Makefiles and other build glue for llvm/clang 3.7.0, as of trunk
r238337.

Upgrade our copy of clang and llvm to 3.6.1 release.

This release contains the following cherry-picked revisions from
upstream trunk:

226124 226151 226164 226165 226166 226407 226408 226409 22665

Upgrade our copy of clang and llvm to 3.6.1 release.

This release contains the following cherry-picked revisions from
upstream trunk:

226124 226151 226164 226165 226166 226407 226408 226409 226652
226905 226983 227084 227087 227089 227208 227209 227210 227211
227212 227213 227214 227269 227430 227482 227503 227519 227574
227822 227986 227987 227988 227989 227990 228037 228038 228039
228040 228188 228189 228190 228273 228372 228373 228374 228403
228765 228848 228918 229223 229225 229226 229227 229228 229230
229234 229235 229236 229238 229239 229413 229507 229680 229750
229751 229752 229911 230146 230147 230235 230253 230255 230469
230500 230564 230603 230657 230742 230748 230956 231219 231237
231245 231259 231280 231451 231563 231601 231658 231659 231662
231984 231986 232046 232085 232142 232176 232179 232189 232382
232386 232389 232425 232438 232443 232675 232786 232797 232943
232957 233075 233080 233351 233353 233409 233410 233508 233584
233819 233904 234629 234636 234891 234975 234977 235524 235641
235662 235931 236099 236306 236307

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

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Minor updates to llvm's pregenerated config headers.

Update llvm and clang library and binary Makefiles for 3.6.0 rc1.

Update llvm and clang include files.

Upgrade our copy of llvm/clang to 3.4.1 release. This release contains
mostly fixes, for the following upstream bugs:

http://llvm.org/PR16365 http://llvm.org/PR17473 http://llvm.org/PR18000
http://

Upgrade our copy of llvm/clang to 3.4.1 release. This release contains
mostly fixes, for the following upstream bugs:

http://llvm.org/PR16365 http://llvm.org/PR17473 http://llvm.org/PR18000
http://llvm.org/PR18068 http://llvm.org/PR18102 http://llvm.org/PR18165
http://llvm.org/PR18260 http://llvm.org/PR18290 http://llvm.org/PR18316
http://llvm.org/PR18460 http://llvm.org/PR18473 http://llvm.org/PR18515
http://llvm.org/PR18526 http://llvm.org/PR18600 http://llvm.org/PR18762
http://llvm.org/PR18773 http://llvm.org/PR18860 http://llvm.org/PR18994
http://llvm.org/PR19007 http://llvm.org/PR19010 http://llvm.org/PR19033
http://llvm.org/PR19059 http://llvm.org/PR19144 http://llvm.org/PR19326

MFC after: 2 weeks

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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 p

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 after: 1 month

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Upgrade our copy of llvm/clang to 3.3 release.

Release notes are still in the works, these will follow soon.

MFC after: 1 month

Upgrade our copy of llvm/clang to trunk r178860, in preparation of the
upcoming 3.3 release (branching and freezing expected in a few weeks).

Preliminary release notes can be found at the usual loca

Upgrade our copy of llvm/clang to trunk r178860, in preparation of the
upcoming 3.3 release (branching and freezing expected in a few weeks).

Preliminary release notes can be found at the usual location:
<http://llvm.org/docs/ReleaseNotes.html>

An MFC is planned once the actual 3.3 release is finished.

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Upgrade our copy of llvm/clang to trunk r162107. With thanks to
Benjamin Kramer and Joerg Sonnenberger for their input and fixes.

Upgrade our copy of llvm/clang to trunk r154661, in preparation of the
upcoming 3.1 release (expected in a few weeks). Preliminary release
notes can be found at: <http://llvm.org/docs/ReleaseNotes.h

Upgrade our copy of llvm/clang to trunk r154661, in preparation of the
upcoming 3.1 release (expected in a few weeks). Preliminary release
notes can be found at: <http://llvm.org/docs/ReleaseNotes.html>

MFC after: 2 weeks

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Revert r227538, since it doesn't compile with clang at all (it doesn't
allow the built-in operations to be redefined, at least not without
excessive force).

Instead, just disable LLVM's support for

Revert r227538, since it doesn't compile with clang at all (it doesn't
allow the built-in operations to be redefined, at least not without
excessive force).

Instead, just disable LLVM's support for atomic operations for now.
Nothing in either clang or the tablegen tools currently depends on it.

This still allows users of head built before r198344 to upgrade to
top-of-head seamlessly.

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When one attempts to compile the tree with -march=i386, which also used
to be gcc's default before r198344, calls to atomic builtins will not be
expanded inline. Instead, they will be generated as c

When one attempts to compile the tree with -march=i386, which also used
to be gcc's default before r198344, calls to atomic builtins will not be
expanded inline. Instead, they will be generated as calls to external
functions (e.g. __sync_fetch_and_add_N), leading to linking errors later
on.

Put in a seatbelt that disables use of atomic builtins in libstdc++ and
llvm, when tuning specifically for the real i386 CPU. This does not
protect against all possible issues, but it is better than nothing.

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Upgrade our copy of llvm/clang to r142614, from upstream's release_30
branch. This brings us very close to the 3.0 release, which is expected
in a week or two.

MFC after: 1 week

Upgrade our copy of llvm/clang to r135360, from upstream's trunk.

Instead of defining LLVM_MULTITHREADED as 0 or 1, define or undefine it,
and test appropriately. Otherwise it might erroneously pick up some
pthread primitives, and fail to link.

Update llvm's config.h files to match more closely what is generated by
a regular autoconf-based build. More cosmetic than functional changes.

Upgrade our copy of llvm/clang to r126079, from upstream's trunk.

This contains many improvements, primarily better C++ support, an
integrated assembler for x86 and support for -pg.