Install llvm's signal handlers up front to prevent lldb's handlers from being
ignored. This is (hopefully) a stopgap workaround.

When lldb invokes an llvm API that installs signal handlers (e.g.
llvm::sys::RemoveFileOnSignal, possibly via a compiler embedded within lldb),
lldb's signal handlers are overriden if llvm is installing its handlers for the
first time.

To work around llvm's behavior, force it to install its handlers up front, and
*then* install lldb's handlers. In practice this is used to prevent lldb test
processes from exiting due to IO_ERR when SIGPIPE is received.

Note that when llvm installs its handlers, it 1) records the old handlers it
replaces and 2) re-installs the old handlers when its new handler is invoked.
That means that a signal not explicitly handled by lldb can fall back to being
handled by llvm's handler the first time it is received, and then by the
default handler the second time it is received.

Differential Revision: https://reviews.llvm.org/D69403

Without this, we can create a PSADBW node that isn't legal.

zext (ctpop X) --> ctpop (zext X)

This is a prerequisite step for canonicalizing in the other direction (narrow the popcount) in IR - PR43688:
https://bugs.llvm.org/show_bug.cgi?id=43688

I'm not sure if any other targets are affected, but I found a missing fold for PPC, so added tests based on that.
The reason we widen all the way to 64-bit in these tests is because the initial DAG looks something like this:

  t5: i8 = ctpop t4
  t6: i32 = zero_extend t5  <-- created based on IR, but unused node?
    t7: i64 = zero_extend t5

Differential Revision: https://reviews.llvm.org/D69127

Reviewers: arsenm

Reviewed By: arsenm

Subscribers: kzhuravl, jvesely, wdng, nhaehnle, yaxunl, rovka, dstuttard, tpr, t-tye, hiraditya, volkan, Petar.Avramovic, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D69347

sections, but the current code misses certain variants. In particular, those
named when clang takes the code path in
clang/lib/Driver/ToolChain.cpp:416, where crtfiles are named:

clang_rt.<component>-<arch>-<env>.<suffix>

Previously, the code only handled:
clang_rt.<component>.<suffix>
<component>.<suffix>

This revision fixes that.

Summary:
[NFC][libomptarget] move remaining device specific code out of omptarget-nvptx.h

Strictly there is one remaining difference wrt amdgcn - parallelLevel is
volatile qualified on amdgcn and not on nvptx. Determining whether this is
correct - and how to represent the different semantics of 'volatile' under
various conditions - is beyond the scope of this code motion patch.

Reviewers: ABataev, jdoerfert, grokos

Subscribers: openmp-commits

Tags: #openmp

Differential Revision: https://reviews.llvm.org/D69424

Summary:
This patch fixes a crash encountered when debugging optimized code. If some
variable has been completely optimized out, but it's value is nonetheless known,
the compiler can replace it with a DWARF expression computing its value. The
evaluating these expressions results in a eValueTypeHostAddress Value object, as
it's contents are computed into an lldb buffer. However, any value that is
obtained by dereferencing pointers in this object should no longer have the
"host" address type.

Lldb had code to account for this, but it was only present in the
ValueObjectVariable class. This wasn't enough when the object being described
was a struct, as then the object holding the actual pointer was a
ValueObjectChild. This caused lldb to dereference the contained pointer in the
context of the host process and crash.

Though I am not an expert on ValueObjects, it seems to me that this children
address type logic should apply to all types of objects (and indeed, applying
applying the same logic to ValueObjectChild fixes the crash). Therefore, I move
this code to the base class, and arrange it to be run everytime the value is
updated.

The test case is a reduced and simplified version of the original debug info
triggering the crash. Originally we were dealing with a local variable, but as
these require a running process to display, I changed it to use a global one
instead.

Reviewers: jingham, clayborg

Subscribers: aprantl, lldb-commits

Differential Revision: https://reviews.llvm.org/D69273

See also: D67515

- For the given call expression we would end up repeatedly
   trying to transform the same expression over and over again

- Fix is to keep the old TransformCache when checking for ambiguity

Differential Revision: https://reviews.llvm.org/D69060

This adds a few asserts to the property TableGen backend to prevent
mismatches between property types and their default values. This
would've prevented a copy-paste mistake we discovered downstream.

The IRBuilder needs to add the strictfp attribute to function
definitions and calls when constrained floating point is enabled.

Since so far all front ends have had to do is flip the constrained
switch, I've made this patch always add the required attributes
when said constrained switch is enabled. This continues to keep
changes to front ends minimal.

Differential Revision: D69312

When running libc++ tests on a remote machine via SSH, we can encounter
a 'Permission denied' error.

Fix this with plain old 'chmod +x <executable>'.

Thanks to Sergej Jaskiewicz for the patch.

Differential Revision: https://reviews.llvm.org/D69170

A zext-specific variation of this case is proposed in D69127.

Summary:
Add instruction marker to MachineInstr ExtraInfo. This does almost the
same thing as Pre/PostInstrSymbols, except that it doesn't create a label until
printing instructions. This allows for labels to be put around instructions that
are deleted/duplicated somewhere.

Also undo the workaround in r375137.

Reviewers: rnk

Subscribers: MatzeB, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D69136

Replace some hard tabs with spaces.  NFC.

The test split-arg-dbg-value.ll has a host-specific path in the
full output captured by update_llc_test_checks.

Fix for test failures introduced in https://reviews.llvm.org/D69402

Tags: #llvm

(check commit access)

Summary:
There are `*_ov()` functions already, so at least for consistency it may be good to also have saturating variants.
These may or may not be needed for `ConstantRange`'s `shlWithNoWrap()`

Reviewers: spatel, nikic

Reviewed By: nikic

Subscribers: hiraditya, dexonsmith, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D69398

Summary:
There are `*_ov()` functions already, so at least for consistency it may be good to also have saturating variants.
These may or may not be needed for `ConstantRange`'s `mulWithNoWrap()`

Reviewers: spatel, nikic

Reviewed By: nikic

Subscribers: hiraditya, dexonsmith, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D69397

Summary:
Ternary expression checks for ISD::ADD instead of ISD::UADDO inside DAGTypeLegalizer::ExpandIntRes_UADDSUBO.
This means the ternary expression will evaluate to ISD::SUBCARRY for both ISD::UADDO and ISD::USUBO nodes.
Targets are likely to implement both, so impact will be very limited in practice.

Reviewers: bogner, lebedev.ri

Reviewed By: lebedev.ri

Subscribers: lebedev.ri, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D68123

[clang-format] [NFC] update the documentation in Format.h to allow dump_format_style.py to get a little closer to being correct.

Summary:
Running dump_format_style.py on the tip of the trunk causes ClangFormatStyleOptions.rst to have changes, which I think ideally it shouldn't.

Some recent commits have meant Format.h and ClangFormatStyleOptions.rst have become out of sync such that dump_format_style.py either couldn't be run or generated incorrect .rst files.

It's also important to remember to edit the IncludeStyles from Tooling.

Make a couple of changes {D6833} {D64695} which came from recent clang-format commits that missed this step. There are still a couple of other changes  from commit {D67541} {D68296} which also need to be looked at, but I'd like to park these first two changes first.

The authors of these original commits I've included in the reviewers, I'm happy to work on the changes, just really need to know which is the ground truth of the changes you want to keep (whats in the Format.h) or what is in the ClangFormatStyleOptions.rst

Reviewers: klimek, mitchell-stellar, owenpan, jvoung, Manikishan, sammccall

Reviewed By: mitchell-stellar

Subscribers: cfe-commits

Tags: #clang-format, #clang

Differential Revision: https://reviews.llvm.org/D69404

Summary:
The variable LLVM_NO_DEAD_STRIP is set in LLVM cmake files when building executables that might make use of plugins .The name of the variable does not convey the actual intended usage (i.e. for use with tools that have plugins), just what the eventual effect of setting in on some (i.e. not garbage collecting unused symbols).

This patch renames it to LLVM_SUPPORT_PLUGINS to convey the intended usage, which will allow subsequent patches to add behavior to support that in different ways without confusion about whether it will do on, for example, non-gnu platforms.

Reviewers: hubert.reinterpretcast, stevewan

Reviewed By: stevewan

Subscribers: cfe-commits, mgorny, llvm-commits

Tags: #llvm, #clang

Differential Revision: https://reviews.llvm.org/D69356

Details:
- nconflicts field initialized;
- formatting fix (moved declaration out of the long line);
- count conflicts in new hash as opposed to old one.

Differential Revision: https://reviews.llvm.org/D68036

Complete fp16 support by ensuring that load extension / truncate store
operations are properly expanded.

Reviewers: asb, lenary
Reviewed By: lenary
Differential Revision: https://reviews.llvm.org/D69246

selectImpl is able to select G_FSQRT when we set bank for vector
operands to fprb. Add detailed tests.
Note: G_FSQRT is generated from llvm-ir intrinsics llvm.sqrt.*,
and at the moment MIPS is not able to generate this intrinsic for
vector type (some targets generate vector llvm.sqrt.* from calls
to a builtin function).
__builtin_msa_fsqrt_<format> will be transformed into G_FSQRT
in legalizeIntrinsic and selected in the same way.

Differential Revision: https://reviews.llvm.org/D69376

Summary:
During the compilation of the `clangd/refactor/tweaks/ExpandAutoType.cpp`, MSVC returns the following error:

llvm-monorepo\llvm\tools\clang\tools\extra\clangd\refactor\tweaks\ExpandAutoType.cpp(85): error C2146: syntax error: missing ')' before identifier 'and'
llvm-monorepo\llvm\tools\clang\tools\extra\clangd\refactor\tweaks\ExpandAutoType.cpp(85): error C2065: 'and': undeclared identifier
llvm-monorepo\llvm\tools\clang\tools\extra\clangd\refactor\tweaks\ExpandAutoType.cpp(86): error C2143: syntax error: missing ';' before '<template-id>'
llvm-monorepo\llvm\tools\clang\tools\extra\clangd\refactor\tweaks\ExpandAutoType.cpp(73): fatal error C1075: '{': no matching token found

So, && must be used instead of `and`.

Patch By Pavel Samolysov (@psamolysov) !

Reviewers: kadircet

Reviewed By: kadircet

Subscribers: ilya-biryukov, MaskRay, jkorous, arphaman, kadircet, usaxena95, cfe-commits

Tags: #clang, #clang-tools-extra

Differential Revision: https://reviews.llvm.org/D69427

It isn't really necessary for them to run the clang driver, and it's
more efficient not to (and also more stable against driver changes).
Now they invoke cc1 directly, more like the analogous NEON tests.

Reviewers: dmgreen

Subscribers: kristof.beyls, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D69426

SHT_NOTE needs at least an empty "Content" in the YAML description.
Should fix http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-ubuntu-fast

SHT_NOTE is the section that consists of
namesz, descsz, type, name + padding, desc + padding data.
This patch teaches yaml2obj, obj2yaml to dump and parse them.

This patch implements the section how it is described here:
https://docs.oracle.com/cd/E23824_01/html/819-0690/chapter6-18048.html
Which says: "For 64–bit objects and 32–bit objects, each entry is an array of 4-byte words in
the format of the target processor"

The official specification is different
http://www.sco.com/developers/gabi/latest/ch5.pheader.html#note_section
And says: "n 64-bit objects (files with e_ident[EI_CLASS] equal to ELFCLASS64), each entry is an array
of 8-byte words in the format of the target processor. In 32-bit objects (files with e_ident[EI_CLASS]
equal to ELFCLASS32), each entry is an array of 4-byte words in the format of the target processor"

Since LLVM uses the first, 32-bit way, this patch follows it.

Differential revision: https://reviews.llvm.org/D68983

Summary:
Incoming define out-of-line tweak requires access to index.

This patch simply propogates the index in ClangdServer to Tweak::Selection while
passing the AST. Also updates TweakTest to accommodate this change.

Reviewers: ilya-biryukov

Subscribers: MaskRay, jkorous, arphaman, usaxena95, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D69165

Summary:
This is an helper for incoming move definition out-of-line action to
figure out possible insertion locations for definition of a qualified name.

Reviewers: hokein, ilya-biryukov

Subscribers: MaskRay, jkorous, arphaman, usaxena95, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D68024

Summary:
Initial version of DefineInline action that will fully qualify every
name inside function body.

Reviewers: sammccall, ilya-biryukov, hokein

Tags: #clang

Differential Revision: https://reviews.llvm.org/D66647

Summary:
Introduces DefineInline action and initial version of
availability checks.

Reviewers: sammccall, ilya-biryukov, hokein

Tags: #clang

Differential Revision: https://reviews.llvm.org/D65433

This just reorders the code and removes an assignment
of an empty string for the case when a relocation has
no symbol associated. With this our output becomes
cleaner and shorter.

Differential revision: https://reviews.llvm.org/D69255