Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r271597:

Pull in r217410 from upstream llvm trunk (by Bob Wilson):

Set trunc store action to Expand for all X86 targets.

When compiling without SSE2, isTruncStoreLegal(F64, F32) would return
Legal, whereas with SSE2 it would return Expand. And since the Target
doesn't seem to actually handle a truncstore for double -> float, it
would just output a store of a full double in the space for a float
hence overwriting other bits on the stack.

Patch by Luqman Aden!

This should fix clang -O0 on i386 assigning garbage to floats, in
certain scenarios.

PR: 187437
Submitted by: cebd@gmail.com
Approved by: re (marius)
Obtained from: http://llvm.org/viewvc/llvm-project?rev=217410&view=rev

MFC debug info for variadic functions

r264826: Merge LLVM r202188:

Debug info: Support variadic functions.
Variadic functions have an unspecified parameter tag after the last
argument. In IR this is represented as an unspecified parameter in the
subroutine type.

Paired commit with CFE r202185.

rdar://problem/13690847

This re-applies r202184 + a bugfix in DwarfDebug's argument handling.

This merge includes a change to use the LLVM 3.4 API in
lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp:

DwarfUnit -> CompileUnit

r264827: Merge Clang r202185:

Debug info: Generate debug info for variadic functions.
Paired commit with LLVM.

rdar://problem/13690847

This merege includes changes to use the Clang 3.4 API (revisions
199686 and 200082) in lib/CodeGen/CGDebugInfo.cpp:

getParamType -> getArgType
getNumParams -> getNumArgs
getReturnType -> getResultType

r264828: Add patches corresponding to r264826 and r264827

Sponsored by: DARPA, AFRL

MFC r267981:

Pull in r211627 from upstream llvm trunk (by Bill Schmidt):

[PPC64] Fix PR20071 (fctiduz generated for targets lacking that
instruction)

PR20071 identifies a problem in PowerPC's fast-isel implementation
for floating-point conversion to integer. The fctiduz instruction
was added in Power ISA 2.06 (i.e., Power7 and later). However, this
instruction is being generated regardless of which 64-bit PowerPC
target is selected.

The intent is for fast-isel to punt to DAG selection when this
instruction is not available. This patch implements that change.
For testing purposes, the existing fast-isel-conversion.ll test adds
a RUN line for -mcpu=970 and tests for the expected code generation.
Additionally, the existing test fast-isel-conversion-p5.ll was found
to be incorrectly expecting the unavailable instruction to be
generated. I've removed these test variants since we have adequate
coverage in fast-isel-conversion.ll.

This is needed to compile clang with debug+asserts on older powerpc64
and ppc970 targets.

Requested by: jhibbits

MFC r267982:

Add the llvm patch for r267981.

MFC r268003:

Fix breakage after r267981.

Pointy hat to: dim

MFC r267704:

Pull in r211435 from upstream llvm trunk (by Benjamin Kramer):

Legalizer: Add support for splitting insert_subvectors.

We handle this by spilling the whole thing to the stack and doing the
insertion as a store.

PR19492. This happens in real code because the vectorizer creates
v2i128 when AVX is enabled.

This fixes a "fatal error: error in backend: Do not know how to split
the result of this operator!" message encountered during compilation of
the net-p2p/libtorrent-rasterbar port.

Reported by: Evgeniy <iron@mail.ua>

MFC r267705:

Add the llvm patch for r267704.

MFC r265925:

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 r263312:

Pull in r196939 from upstream llvm trunk (by Reid Kleckner):

Reland "Fix miscompile of MS inline assembly with stack realignment"

This re-lands commit r196876, which was reverted in r196879.

The tests have been fixed to pass on platforms with a stack alignment
larger than 4.

Update to clang side tests will land shortly.

Pull in r196986 from upstream llvm trunk (by Reid Kleckner):

Revert the backend fatal error from r196939

The combination of inline asm, stack realignment, and dynamic allocas
turns out to be too common to reject out of hand.

ASan inserts empy inline asm fragments and uses aligned allocas.
Compiling any trivial function containing a dynamic alloca with ASan is
enough to trigger the check.

XFAIL the test cases that would be miscompiled and add one that uses the
relevant functionality.

Pull in r202930 from upstream llvm trunk (by Hans Wennborg):

Check for dynamic allocas and inline asm that clobbers sp before building
selection dag (PR19012)

In X86SelectionDagInfo::EmitTargetCodeForMemcpy we check with MachineFrameInfo
to make sure that ESI isn't used as a base pointer register before we choose to
emit rep movs (which clobbers esi).

The problem is that MachineFrameInfo wouldn't know about dynamic allocas or
inline asm that clobbers the stack pointer until SelectionDAGBuilder has
encountered them.

This patch fixes the problem by checking for such things when building the
FunctionLoweringInfo.

Differential Revision: http://llvm-reviews.chandlerc.com/D2954

Together, these commits fix the problem encountered in the devel/emacs
port on the i386 architecture, where a combination of stack realignment,
alloca() and memcpy() could incidentally clobber the %esi register,
leading to segfaults in the temacs build-time utility.

See also: http://llvm.org/PR18171 and http://llvm.org/PR19012

Reported by: ashish
PR: ports/183064

MFC r263313:

Pull in r203311 from upstream llvm trunk (by Arnold Schwaighofer):

ISel: Make VSELECT selection terminate in cases where the condition type has to
be split and the result type widened.

When the condition of a vselect has to be split it makes no sense widening the
vselect and thereby widening the condition. We end up in an endless loop of
widening (vselect result type) and splitting (condition mask type) doing this.
Instead, split both the condition and the vselect and widen the result.

I ran this over the test suite with i686 and mattr=+sse and saw no regressions.

Fixes PR18036.

With this fix the original problem case from the graphics/rawtherapee
port (posted in http://llvm.org/PR18036 ) now compiles within ~97MB RSS.

Reported by: mandree

MFC r263320:

Add separate patch files for all the customizations we have currently
applied to our copy of llvm/clang. These can be applied in alphabetical
order to a pristine llvm/clang 3.4 release source tree, to result in the
same version used in FreeBSD.

This is intended to clearly document all the changes until now, which
mostly consist of cherry pickings from the respective upstream trunks,
plus a number of hand-written FreeBSD-specific ones. Hopefully those
can eventually be cleaned up and sent upstream too.

MFC r262613:

Merge the projects/clang-sparc64 branch back to head. This brings in
several updates from the llvm and clang trunks to make the sparc64
backend fully functional.

Apart from one patch to sys/sparc64/include/pcpu.h which is still under
discussion, this makes it possible to let clang fully build world and
kernel for sparc64.

Any assistance with testing this on actual sparc64 hardware is greatly
appreciated, as there will unavoidably be bugs left.

Many thanks go to Roman Divacky for his upstream work on getting the
sparc64 backend into shape.

MFC r262985:

Repair a few minor mismerges from r262261 in the clang-sparc64 project
branch. This is also to minimize differences with upstream.

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++.

MFC r258005: Merge upstream LLVM r192118:

Formally added an explicit enum for DWARF TLS support. No functionality
change.

Sponsored by: DARPA, AFRL

Pull in r192123 from upstream llvm trunk (by Benjamin Kramer):

X86: Fix type check. Just because an integer type is illegal doesn't
mean it's i64.

Fixes PR17495, where an i24 triggered this code. It's intended to
optimize i64 loads on 32 bit x86.

Fixes "Cannot select" fatal errors when building the audio/jack port
with ALSA support turned on.

This is a direct commit to stable/9 and stable/10, since head already
has the commit as part of an upgrade to llvm/clang 3.4.

Reported by: Radim Kolar <hsn@sendmail.cz> via http://llvm.org/bugs/

MFC r261162:

Pull in r195679 from upstream llvm trunk:

Don't use nopl in cpus that don't support it.

Patch by Mikulas Patocka. I added the test. I checked that for cpu names that
gas knows about, it also doesn't generate nopl.

The modified cpus:
i686 - there are i686-class CPUs that don't have nopl: Via c3, Transmeta
Crusoe, Microsoft VirtualBox - see
https://bbs.archlinux.org/viewtopic.php?pid=775414
k6, k6-2, k6-3, winchip-c6, winchip2 - these are 586-class CPUs
via c3 c3-2 - see https://bugs.archlinux.org/task/19733 as a proof that
Via c3 and c3-Nehemiah don't have nopl

PR: bin/185777

MFC r259888:

Pull in r183971 from upstream llvm trunk:

X86: cvtpi2ps is just an SSE instruction with MMX operands. It has no AVX
equivalent.

Give it the right register format so we can also emit it when AVX is enabled.

This should fix a "Cannot select: intrinsic %llvm.x86.sse.cvtpi2ps" fatal error
in clang while building the gnuradio port for amd64.

Reported by: db

MFC r258350:

Pull in r191896 from upstream llvm trunk:

CaptureTracking: Plug a loophole in the "too many uses" heuristic.

The heuristic was added to avoid spending too much compile time in a
specially crafted test case (PR17461, PR16474) with many uses on a
select or bitcast instruction can still trigger the slow case. Add a
check for that case.

This only affects compile time, don't have a good way to test it.

This fixes the excessive compile time spent on a specific file of the
graphics/rawtherapee port.

Reported by: mandree
Approved by: re (gjb)

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Pull in r192064 from upstream llvm trunk:

X86: Don't fold spills into SSE operations if the stack is unaligned.

Regalloc can emit unaligned spills nowadays, but we can't fold the
spills into SSE ops if we can't guarantee alignment. PR12250.

This fixes unaligned SSE accesses (leading to a SIGBUS) which could
occur in the ffmpeg ports.

Approved by: re (kib)
Reported by: tijl
MFC after: 3 days

Pull in r189644 from upstream llvm trunk:

Add ms_abi and sysv_abi attribute handling.

Based on a patch by Benno Rice!

This will help to develop EFI support.

Approved by: re (kib)
Verified by: benno
MFC after: 1 week

Pull in r186338 from upstream llvm trunk:

Remove invalid assert in DAGTypeLegalizer::RemapValue

There is a comment at the top of DAGTypeLegalizer::PerformExpensiveChecks
which, in part, says:

// Note that these invariants may not hold momentarily when processing a node:
// the node being processed may be put in a map before being marked Processed.

Unfortunately, this assert would be valid only if the above-mentioned invariant
held unconditionally. This was causing llc to assert when, in fact,
everything was fine.

Thanks to Richard Sandiford for investigating this issue!

Fixes PR16562.

This fixes assertions which could occur in the multimedia/ffmpeg1 and
multimedia/ffmpeg2 ports.

Approved by: re (hrs)
Reported by: Matthias Apitz <guru@unixarea.de>
MFC after: 3 days

Pull in r191711 from upstream llvm trunk:

The X86FixupLEAs pass for Intel Atom must not call
convertToThreeAddress on ADD16rr opcodes, if src1 != src, since that
would cause convertToThreeAddress to try to create a virtual register.
This is not permitted after register allocation, which is when the
X86FixupLEAs pass runs.

This patch fixes PR16785.

Pull in r191715 from upstream llvm trunk:

Forgot to add a break statement.

This should enable building the x11-toolskits/libXaw port with
CPUTYPE=atom.

Approved by: re (gjb)
Reported by: Kenta Suzumoto <kentas@hush.com>
MFC after: 3 days

Pull in r191165 from upstream llvm trunk:

ISelDAG: spot chain cycles involving MachineNodes

Previously, the DAGISel function WalkChainUsers was spotting that it
had entered already-selected territory by whether a node was a
MachineNode (amongst other things). Since it's fairly common practice
to insert MachineNodes during ISelLowering, this was not the correct
check.

Looking around, it seems that other nodes get their NodeId set to -1
upon selection, so this makes sure the same thing happens to all
MachineNodes and uses that characteristic to determine whether we
should stop looking for a loop during selection.

This should fix PR15840.

Specifically, this fixes the long-standing assertion failure when
compiling the multimedia/gstreamer port on i386. Thanks to Tijl
Coosemans for his help in getting upstream to fix it.

Approved by: re (marius)

Pull in r189672 from upstream llvm trunk:

InstCombine: Check for zero shift amounts before subtracting one
causing integer overflow.

PR17026. Also avoid undefined shifts and shift amounts larger than 64
bits (those are always undef because we can't represent integer types
that large).

This should fix assertion failures when building the emulators/xmame
port.

Reported by: bapt

Import llvm r187614 (git 44c8e34), for lldb's use:

Author: Daniel Malea <daniel.malea@intel.com>
Date: Thu Aug 1 21:18:16 2013 +0000

Fixed the Intel-syntax X86 disassembler to respect the (existing)
option for hexadecimal immediates, to match AT&T syntax. This also
brings a new option for C-vs-MASM-style hex.

Patch by Richard Mitton
Reviewed: http://llvm-reviews.chandlerc.com/D1243

Pull in r185616 from llvm trunk:

FastISel can only append to basic blocks.

Compute the insertion point from the end of the basic block instead of
skipping labels from the front.

This caused failures in landing pads when live-in copies where inserted
before instruction selection.

I missed this change in r252720; without it, certain compilation flags
can cause exception labels to not be generated, but still referenced,
leading to link errors.

Reported by: zeising
MFC after: 3 days

Pull in r185594 from llvm trunk:

Add MachineBasicBlock::addLiveIn().

This function adds a live-in physical register to an MBB and ensures
that it is copied to a virtual register immediately.

Pull in r185615 from llvm trunk:

Live-in copies go *after* EH_LABELs.

This will soon be tested by exception handling working at all.

Pull in r185617 from llvm trunk:

Simplify landing pad lowering.

Stop using the ISD::EXCEPTIONADDR and ISD::EHSELECTION when lowering
landing pad arguments. These nodes were previously legalized into
CopyFromReg nodes, but that never worked properly because the
CopyFromReg node weren't guaranteed to be scheduled at the top of the
basic block.

This meant the exception pointer and selector registers could be
clobbered before being copied to a virtual register.

This patch copies the two physical registers to virtual registers at
the beginning of the basic block, and lowers the landingpad instruction
directly to two CopyFromReg nodes reading the *virtual* registers. This
is safe because virtual registers don't get clobbered.

A future patch will remove the ISD::EXCEPTIONADDR and ISD::EHSELECTION
nodes.

Together, these changes fix llvm PR 16038 ('qt4 webcore file results in
"Bad machine code: Using an undefined physical register"'), and should
make it possible again to compile the www/qt4-webkit port again on the
i386 arch, without using a CPUTYPE=i686 or higher setting.

Work around an ARM EABI issue where clang would sometimes incorrectly align
the stack in a leaf function that uses TLS.

The issue is, when using TLS, the function is no longer a leaf as it calls
__aeabi_read_tp. With statically linked programs this is not an issue as
it doesn't make use of the stack, however with dynamically linked
applications we enter rtld which does use the stack and makes assumptions
about it's alignment.

This is only a temporary fix until a better patch can be made and submitted
upstream.

Pull in r183984 from llvm trunk:

Make PrologEpilogInserter save/restore all callee saved registers in
functions which call __builtin_unwind_init()

__builtin_unwind_init() is an undocumented gcc intrinsic which has
this effect, and is used in libgcc_eh.

Goes part of the way toward fixing PR8541.

This obsoletes the ugly hack to libgcc's unwind code from r245272, and
should also work for other arches, so revert the hack too.

Pull in r181620 from llvm trunk:

[ms-inline asm] Fix a crasher when we fail on a direct match.

The issue was that the MatchingInlineAsm and VariantID args to the
MatchInstructionImpl function weren't being set properly. Specifically, when
parsing intel syntax, the parser thought it was parsing inline assembly in the
at&t dialect; that will never be the case.

The crash was caused when the emitter tried to emit the instruction, but the
operands weren't set. When parsing inline assembly we only set the opcode, not
the operands, which is used to lookup the instruction descriptor.
rdar://13854391 and PR15945

Also, this commit reverts r176036. Now that we're correctly parsing the intel
syntax the pushad/popad don't match properly. I've reimplemented that fix using
a MnemonicAlias.

Pull in r183907 from llvm trunk:

X86: Make the cmov aliases work with intel syntax too.

These commits make a number of Intel-style inline assembly mnemonics
aliases (occurring in several ports) work properly, which could cause
assertions otherwise.

Reported by: kwm, bapt

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

Pull in r183297 from upstream llvm trunk:

PR15662: Optimized debug info produces out of order function
parameters

When a function is inlined we lazily construct the variables
representing the function's parameters. After that, we add any
remaining unused parameters.

If the function doesn't use all the parameters, or uses them out of
order, then the DWARF would produce them in that order, producing a
parameter order that doesn't match the source.

This fix causes us to always keep the arg variables at the start of
the variable list & in the original order from the source.

Reported by: avg
MFC after: 1 week

Pull in r182656 from upstream llvm trunk:

LoopVectorize: LoopSimplify can't canonicalize loops with an
indirectbr in it, don't assert on those cases.

Fixes PR16139.

This should fix clang assertion failures when optimizing at -O3, similar
to:

Assertion failed: (TheLoop->getLoopPreheader() && "No preheader!!"),
function canVectorize, file
contrib/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp, line 2171.

Reported by: O. Hartmann <ohartman@zedat.fu-berlin.de>
PR: ports/178332, ports/178977
MFC after: 3 days

Pull in r181286 from upstream llvm trunk:

LoopVectorize: getConsecutiveVector must respect signed arithmetic

We were passing an i32 to ConstantInt::get where an i64 was needed and we must
also pass the sign if we pass negatives numbers. The start index passed to
getConsecutiveVector must also be signed.

Should fix PR15882.

This should fix Firefox crashes some people have been reporting, when it
is compiled with -O3.

Pull in r180121 from upstream llvm trunk:

LoopVectorizer: Fix 15830. When scalarizing and unrolling stores make
sure that the order in which the elements are scalarized is the same
as the original order.
This fixes a miscompilation in FreeBSD's regex library.

This should fix lib/libc/regex/regcomp.c at -O3 with clang 3.3 r178860
on CPUs with SSE. Before this change, the vectorizer could incorrectly
rearrange the second loop in computejumps(), leading to possibly invalid
entries in the re_gets::charjump table.

The net result was that for example "sed s/@CC@/foo/" failed to work
correctly, leading to trouble with many configure scripts.

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.

Pull in r175962 from upstream llvm trunk:

X86: Disable cmov-memory patterns on subtargets without cmov.

Fixes PR15115.

For the i386 arch, this should enable cmov instructions only on
-march=pentiumpro and higher. Since our default CPU is i486, cmov
instructions will now be disabled by default.

MFC after: 1 week

Pull in r175360 from upstream llvm trunk:

MCParser: Reject .balign with non-pow2 alignments.

GNU as rejects them and there are configure scripts in the wild that
check if the assembler rejects ".align 3" to determine whether the
alignment is in bytes or powers of two.

MFC after: 3 days

Pull in r175057 from upstream llvm trunk:

X86: Disable generation of rep;movsl when %esi is used as a base pointer.

This happens when there is both stack realignment and a dynamic alloca in the
function. If we overwrite %esi (rep;movsl uses fixed registers) we'll lose the
base pointer and the next register spill will write into oblivion.

Fixes PR15249 and unbreaks firefox on i386/freebsd. Mozilla uses dynamic allocas
and freebsd a 4 byte stack alignment.

MFC after: 1 week

Clean some 'svn:executable' properties in the tree.

Submitted by: Christoph Mallon
MFC after: 3 days

Upgrade our copy of llvm/clang to 3.2 release.

Release notes for llvm:
http://llvm.org/releases/3.2/docs/ReleaseNotes.html

Release notes for clang:
http://llvm.org/releases/3.2/tools/clang/docs/ReleaseNotes.html

MFC after: 2 weeks

Pull in r170353 from upstream llvm trunk:

Fix another SROA crasher, PR14601.

This was a silly oversight, we weren't pruning allocas which were used
by variable-length memory intrinsics from the set that could be widened
and promoted as integers. Fix that.

This should fix the following assertion failure:

Assertion failed: (CanSROA), function visitUsers, file
/usr/src/lib/clang/libllvmscalaropts/../../../contrib/llvm/lib/Transforms/Scalar/SROA.cpp,
line 2395.

Reported by: gerald

Upgrade our copy of llvm/clang to r168974, from upstream's release_32
branch. This is effectively llvm/clang 3.2 RC2; the 3.2 release is
coming soon.

Reduce LLVM's default stack alignment for i386 from 16 to 4 bytes, as
the FreeBSD ABI requires. This is essentially a revert of upstream llvm
commit r126226, and it will be reverted by upstream too.

MFC after: 1 week

Pull in r165377 from upstream llvm trunk:

X86: fcmov doesn't handle all possible EFLAGS, fall back to a branch
for the others.

Otherwise it will try to use SSE patterns and fail horribly if sse is
disabled.

Fixes PR14035.

This should fix the following assertion failure:

Assertion failed: (Reg >= X86::FP0 && Reg <= X86::FP6 && "Expected FP
register!"), function getFPReg, file
contrib/llvm/lib/Target/X86/X86FloatingPoint.cpp, line 330.

which can show up when compiling contrib/compiler-rt, using -march=i686
through -march=pentium3 (CPU's which do support fcmov, but don't support
SSE2).

MFC after: 1 week

Pull in r165367 from upstream llvm trunk:

Make sure always-inline functions get inlined. <rdar://problem/12423986>

Without this change, when the estimated cost for inlining a function with
an "alwaysinline" attribute was lower than the inlining threshold, the
getInlineCost function was returning that estimated cost rather than the
special InlineCost::AlwaysInlineCost value. That is fine in the normal
inlining case, but it can fail when the inliner considers the opportunity
cost of inlining into an internal or linkonce-odr function. It may decide
not to inline the always-inline function in that case. The fix here is just
to make getInlineCost always return the special value for always-inline
functions. I ran into this building clang with libc++. Tablegen failed to
link because of an always-inline function that was not inlined. I have been
unable to reduce the testcase down to a reasonable size.

This should fix the link errors that were reported when atf-run was
compiled with clang -stdlib=libc++. In this case, at -O3 optimization,
some calls to basic_ios::clear() were not inlined, even when the
function was marked __always_inline__.

Reported by: Jan Beich <jbeich@tormail.org>
MFC after: 1 week

Pull in r165878 from upstream llvm trunk:

X86: Disable long nops for all cpus prior to pentiumpro/i686.

This is the safest approach for now. If you think long nops matter a
lot for performance, compile with -march=i686 or higher. :)

MFC after: 3 days

Pull in r164132 from upstream llvm trunk:

When creating MCAsmBackend pass the CPU string as well. In X86AsmBackend
store this and use it to not emit long nops when the CPU is geode which
doesnt support them.

Fixes PR11212.

Pull in r164133 from upstream clang trunk:

Follow up on llvm r164132.

This should prevent illegal instructions when building world on Geode
CPUs (e.g. Soekris).

MFC after: 3 days

Pull in r163710 from upstream llvm trunk:

Add support for AMD Geode.

MFC after: 3 days

Pull in r163967 from upstream llvm trunk:

X86: Emitting x87 fsin/fcos for sinf/cosf is not safe without unsafe
fp math.

This should make clang emit calls to libm for sinf/cosf by default.

MFC after: 1 week

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

Pull in r156591 from upstream llvm trunk:

Allow unique_file to take a mode for file permissions, but default
to user only read/write.

and r156592 from upstream clang trunk:

For final output files create them with mode 0664 to match other
compilers and expected defaults.

This should fix clang creating files with mode 0600.

Reported by: James <james@hicag.org>
MFC after: 3 days

Upgrade our copy of llvm/clang to 3.1 release. Release notes can be
found at: http://llvm.org/releases/3.1/docs/ReleaseNotes.html

MFC after: 3 days

Upgrade our copy of llvm/clang to r155985, from upstream's release_31
branch. This brings us very close to the 3.1 release, which is planned
for May 14th.

MFC after: 2 weeks

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

Pull in r148240 from upstream llvm trunk:

Make sure the non-SSE lowering for fences correctly clobbers EFLAGS.
PR11768.

In particular, this fixes segfaults during the build of devel/icu on
i386. The __sync_synchronize() builtin used for implementing icu's
internal barrier could lead to incorrect behaviour.

MFC after: 3 days

Upgrade our copy of llvm/clang to 3.0 release. Release notes can be
found at: http://llvm.org/releases/3.0/docs/ReleaseNotes.html

MFC after: 1 week

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

Revive the LLVM and Clang license files, which were removed in my
too-thorough cleanup of unused files, in r213695. Also make sure these
get installed under /usr/share/doc.

Submitted by: rwatson, brooks
Pointy hat to: dim
MFC after: 3 days

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

Upgrade our copy of llvm/clang to r132879, from upstream's trunk.

Make cross-compiling using clang work better, by respecting the
LLVM_HOSTTRIPLE that is defined during the cross-tools stage.

Using clang, you can now build amd64 world and kernel on i386, and vice
versa. Other arches still need work.

Upgrade our copy of llvm/clang to r130700, from upstream's trunk.

Update llvm/clang to trunk r126547.

There are several bugfixes in this update, but the most important one is
to ensure __start_ and __stop_ symbols for linker sets and kernel module
metadata are always emitted in object files:

http://llvm.org/bugs/show_bug.cgi?id=9292

Before this fix, if you compiled kernel modules with clang, they would
not be properly processed by kldxref, and if they had any dependencies,
the kernel would fail to load those. Another problem occurred when
attempting to mount a tmpfs filesystem, which would result in 'operation
not supported by device'.

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.

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.

Remove more unneeded files and directories from contrib/llvm. This
still allows us to build tblgen and clang, and further reduces the
footprint in the tree.

Approved by: rpaulo (mentor)

Upgrade Clang and LLVM to the 2.8 release. See here for release notes:
http://llvm.org/releases/2.8/docs/ReleaseNotes.html

Approved by: rpaulo (mentor)

Upgrade our Clang in base to r114020, from upstream's release_28 branch.

Approved-by: rpaulo (mentor)

Upgrade our Clang in base to r108428.

This commit merges the latest LLVM sources from the vendor space. It
also updates the build glue to match the new sources. Clang's version
number is changed to match LLVM's, which means /usr/include/clang/2.0
has been renamed to /usr/include/clang/2.8.

Obtained from: projects/clangbsd

Comment out piece of code using __clear_cache() which FreeBSD
does not have. This is only used for JIT on ARM so it's harmless.

Approved by: ed (mentor)

Import LLVM/clang from vendor stripped of docs/ test/ website/ www/ examples/
in llvm/ and/or llvm/contrib/clang/ respectively.

Approved by: ed (mentor)
Approved by: core

Update LLVM to r104832.

Update LLVM to r103052.

Update LLVM to r103004.

Update LLVM to r100520.

Update LLVM to r100285.

Update LLVM to r100181.

Update LLVM to r99115.

Update LLVM to r98631.

Update LLVM to r98164.

Update LLVM to r97873.

Update LLVM to 97654.

Update LLVM to r96341.

Update LLVM to r94309.

Update LLVM to 93512.

Update LLVM to 92395.

Update LLVM to 91430.

Update LLVM to r90226.

Update LLVM to r89337.

Update LLVM to r89205.

Update LLVM to r86140.

Delete this file.

Update LLVM to r86025.

This was removed upstream.

Update LLVM to r84949.

Delete all stale files.

Update llvm to r84175.

Update llvm to r84119.

Import LLVM 74788.

Import LLVM r74383.

Import LLVM r73984.

It seems I keep importing sources at very unlucky moments. Let's see
what this revision of LLVM does.

Import LLVM r73954.

Update LLVM sources to r73879.

Import LLVM r73340.

Import LLVM r73070.

Now I'm going to stop importing code for a while. I spent a lot of time
the last couple of days figuring out which LLVM commit caused g++ to
miscompile, which in its turn caused Clang to miscompile the next build.
I had to run `make buildworld' twice each time I bisected a revision.

Import LLVM r73021.

Import LLVM, at r72995.

We should now have support for #pragma weak.

Import LLVM, at r72805, which fixes PR4315 and PR4316.

Normally I'm not updating sources this often, but I want to get rid of
this breakage, because right now I can't offer a proper source snapshot
yet.

Import LLVM, at r72770.

This should fix LLVM PR4225.

Import LLVM, at r72732.