This reverts commit a0c7108b.

Summary:
Added a new IRCanonicalizer pass which aims to transform LLVM modules into
a canonical form by reordering and renaming instructions while preserving the
same semantics. The canonicalizer makes it easier to spot semantic differences
when diffing two modules which have undergone different passes.

Presentation: https://www.youtube.com/watch?v=c9WMijSOEUg

Reviewed by: plotfi

Differential Revision: https://reviews.llvm.org/D66029

This was introduced with commit 54e91a3c

When performing codegen at optnone, don't add alias analysis to
the pipeline. We don't need it, but it causes an unnecessary
dominator tree calculation.

I've also moved the module verifier call to the top so that a bunch
of disabled-at-optnone passes group more nicely.

Differential Revision: https://reviews.llvm.org/D80378

If the caller needs to reponsible for making sure the MaybeAlign
has a value, then we should just make the caller convert it to an Align
with operator*.

I explicitly deleted the relational comparison operators that
were being inherited from Optional. It's unclear what the meaning
of two MaybeAligns were one is defined and the other isn't
should be. So make the caller reponsible for defining the behavior.

I left the ==/!= operators from Optional. But now that exposed a
weird quirk that ==/!= between Align and MaybeAlign required the
MaybeAlign to be defined. But now we use the operator== from
Optional that takes an Optional and the Value.

Differential Revision: https://reviews.llvm.org/D80455

[MC] Drop unneeded std::abs for DW_def_cfa_offset in DarwinX86AsmBackend::generateCompactUnwindEncoding

This clean-up is available after double negation bugs are fixed.

Negations are incorrectly added in numerous places and the code just happens to work.
Also fix a missed DW_CFA_def_cfa_offset negation in c693b9c3:
ARMAsmBackendDarwin::generateCompactUnwindEncoding

[X86] Update some av512 shift intrinsics to use "unsigned int" parameter instead of int to match Intel documentation

There are 65 that take a scalar shift amount. Intel documentation shows 60 of them taking unsigned int. There are 5 versions of srli_epi16 that use int, the 512-bit maskz and 128/256 mask/maskz.

Fixes PR45931

Differential Revision: https://reviews.llvm.org/D80251

Negations are incorrectly added in two places and the code works just
because the negations cancel each other.

- Change title to "DWARF Proposal For Heterogeneous Debugging".

- Change title to "DWARF For Heterogeneous Debugging".
- Add "Examples" section that references the AMDGPUUsage DWARF section.
- Make the "References" section a top level section.

Differential Revision: https://reviews.llvm.org/D70523

The negative Offset has caused a bunch of problems and confused quite a
few call sites. Delete the unneeded negation and fix all call sites.

The negative Offset has caused a bunch of problems and confused quite a
few call sites. Delete the unneeded negation and fix all call sites.

This patchs adds an optional warning that is printed when stopped at a
frame that was compiled in a source language that LLDB has no plugin
for.

The motivational use-case is debugging Swift code on Linux. When the
user accidentally invokes the system LLDB that was built without the
Swift plugin, it is very much non-obvious why debugging doesnt
work. This warning makes it easy to figure out what went wrong.

<rdar://problem/56986569>

This reverts commit 78dea0e8.

The offending lldb test (which is a real bug exposed by this patch)
has been disabled on windows (see a67b2faa)
and lldb is queued for inclusion into precommit testing, which would
have caught this.

Differential Revision: https://reviews.llvm.org/D80389

This prevents autogeneration of degenerate names for these.

Differential Revision: https://reviews.llvm.org/D80451

covered switch warning.

As noted in D80236, moving the pass in the pipeline exposed this
shortcoming. Extra work to recalculate the alias results showed
up as a compile-time slowdown.

The two functions don't throw, and the generated code is better when
we explicitly tell the compiler that the functions are noexcept. This
isn't an ABI break because the signatures of the functions stay the
same with or without noexcept.

Fixes https://llvm.org/PR46016

Differential Revision: https://reviews.llvm.org/D80379

The generated binary (APITests.exe) is not a valid googletest binary. I
suspect it has something to do with us linking against liblldb.

This patch adds support for Vector Multiply-Sum Unsigned Doubleword Modulo
instruction; vmsumudm.

Differential Revision: https://reviews.llvm.org/D80294

The tests had copy-paste errors which started showing when an
unused-variable warning started being emitted after we made
the MoveOnly type constexpr (in a4b8ee64).

This temporarily reverts commit 7019cea2.

It seems that, for some targets, there are instructions with a lot of memory operands (probably more than would be expected). This causes a lot of buildbots to timeout and notify failed builds. While investigations are ongoing to find out why this happens, revert the changes.

This reverts commit 5f88f39a. It broke these
three tests on the Window bot:
  lldb-api :: commands/expression/completion/TestExprCompletion.py
  lldb-api :: lang/cpp/scope/TestCppScope.py
  lldb-api :: lang/cpp/standards/cpp11/TestCPP11Standard.py

This is necessary when writing constexpr tests.

Revert "[analyzer] Change the default output type to PD_TEXT_MINIMAL in the frontend, error if an output loc is missing for PathDiagConsumers that need it"

This reverts commit fe1a3a7e.

This change adds common C, C++, and POSIX functions to the clang-tidy unused return value checker.

Differential Revision: https://reviews.llvm.org/D76083

These files haven't been touched since 2015. According to Pavel these
were intended to be test for the test framework which never really took
of and are mostly irrelevant by now.

Differential revision: https://reviews.llvm.org/D80408

There are 2 known problem patterns shown in the test diffs here:
vector horizontal ops (an x86 specialization) and vector reductions.

SLP has greater ability to match and fold those than vector-combine,
so let SLP have first chance at that.

This is a quick fix while we continue to improve vector-combine and
possibly canonicalize to reduction intrinsics.

In the longer term, we should improve matching of these patterns
because if they were created in the "bad" forms shown here, then we
would miss optimizing them.

I'm not sure what is happening with alias analysis on the addsub test.
The old pass manager now shows an extra line for that, and we see an
improvement that comes from SLP vectorizing a store. I don't know
what's missing with the new pass manager to make that happen.
Strangely, I can't reproduce the behavior if I compile from C++ with
clang and invoke the new PM with "-fexperimental-new-pass-manager".

Differential Revision: https://reviews.llvm.org/D80236

Summary:
This fixes two llc crashes with the following tests when RISC-V is the default
target.

LLVM :: DebugInfo/Generic/global.ll
LLVM :: DebugInfo/Generic/inlined-strings.ll

Reviewers: HsiangKai

Reviewed By: HsiangKai

Subscribers: hiraditya, asb, rbar, johnrusso, simoncook, sabuasal, niosHD, kito-cheng, shiva0217, jrtc27, MaskRay, zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o, rkruppe, PkmX, jocewei, psnobl, benna, Jim, lenary, s.egerton, sameer.abuasal, apazos, luismarques, evandro, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D80352

Summary:
Tasks can crash with many different exceptions including SystemExit.
Bare except still causes a warning, so let's use BaseException instead.

Differential Revision: https://reviews.llvm.org/D80443