Summary:
Improve the checks and drop redundant ones. Rename the outlined maps
better.

Reviewers: andydavis1, nicolasvasilache

Subscribers: mehdi_amini, rriddle, jpienaar, shauheen, antiagainst, nicolasvasilache, arpith-jacob, mgester, lucyrfox, aartbik, liufengdb, Joonsoo, grosul1, frgossen, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D78514

Summary: The CallSite arg iterator is really User::op_iterator.

Reviewers: dblaikie, craig.topper

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D78507

Fix intra-tile upper bound setting in a scenario where the tile size was
larger than the trip count.

Differential Revision: https://reviews.llvm.org/D78505

This fixes a common mistake (the 3 should be @3): NSNumber *n = 3. This extends
an existing check for NSString. Also, this only errs if the initializer isn't a
null pointer constant, so NSNumber *n = 0; continues to work. rdar://47029572

Differential revision: https://reviews.llvm.org/D78066

Summary: This seems like a pretty safe case, and common enough to be useful.

Reviewers: hokein

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

Tags: #clang

Differential Revision: https://reviews.llvm.org/D78338

This will allow us to use the datalayout to disambiguate other
constructs in IR, like load alignment. Split off from D78403.

Differential Revision: https://reviews.llvm.org/D78413

This wasn't a great idea to begin with, as you can't really rely on the
implementation, but since it also doesn't work with MSVC I've just made
the ctors public.

Summary:
r13 isn't reserved on 32-bit AIX, which is reflected in our calling
convention but not callee saved regs.

Reviewers: sfertile, ZarkoCA, cebowleratibm, jasonliu

Reviewed By: sfertile

Subscribers: thakis, lei, wuzish, nemanjai, hiraditya, kbarton, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D77101

We call the function that attempts to reuse the conversion without checking
whether the target matches the constraints that the callee expects. This patch
adds the check prior to the call.

Fixes: https://bugs.llvm.org/show_bug.cgi?id=43976

Differential revision: https://reviews.llvm.org/D77564

This reverts commit e62dc1f6.

Reverting as per discussion with the patch author.
This patch causes module import error, but there was no intended
behavior change for code that does not use Microsoft extensions.

Differential Revision: https://reviews.llvm.org/D78475

Summary:
This patch add the dataflow option to LLVM_USE_SANITIZER and documents
it.

Tested via check-cxx (wip to fix the errors).

Reviewers: morehouse, #libc!

Subscribers: mgorny, cfe-commits, libcxx-commits

Tags: #clang, #libc

Differential Revision: https://reviews.llvm.org/D78390

This reverts commit 6c881bf1.

This started failing after an OS upgrade on a buildbot machine, and I
don't see anything obvious to fix or revert, so disable it for now to
get the bot green.

Covered by https://bugs.llvm.org/show_bug.cgi?id=44158

Differential revision: https://reviews.llvm.org/D78496

Support passive replay as proposed in the RFC [1] on lldb-dev and
described in more detail on the lldb website [2].

This patch extends the LLDB_RECORD macros to re-invoke the current
function with arguments deserialized from the reproducer. This relies on
the function being called in the exact same order as during replay. It
uses the same mechanism to toggle the API boundary as during recording,
which guarantees that only boundary crossing calls are replayed.

Another major change is that before this patch we could ignore the
result of an API call, because we only cared about the observable
behavior. Now we need to be able to return the replayed result to the
SWIG bindings.

We reuse a lot of the recording infrastructure, which can be a little
confusing. We kept the existing naming to limit the amount of churn, but
might revisit that in a future patch.

[1] http://lists.llvm.org/pipermail/lldb-dev/2020-April/016100.html
[2] https://lldb.llvm.org/resources/reproducers.html

Differential revision: https://reviews.llvm.org/D77602

Following the rule of five, declare move constructor and move
assignment operator for ValueLatticeElement. This allows moving
the ConstantRange rather than copying it.

This does not matter in most cases, where we're dealing with
APInts <= 64 bits. It does avoid unnecessary copies of allocations
for larger APInts.

Additionally we change the implementation approach to make the
copy/move assignment operators make use of the copy/move constructors,
rather than the other way around. The constructors are the more
primitive operations.

Differential Revision: https://reviews.llvm.org/D78425

Use Instruction::comesBefore() instead of OrderedInstructions
inside InstructionPrecedenceTracking. This also removes the
dominator tree dependency.

Differential Revision: https://reviews.llvm.org/D78461

Summary:
When I read this on the website it looks like the `--` in the used font turns
into an em dash. I updated this with inline literal mark up so the `--` will
remain obvious.

Reviewers: EricWF, #libc!

Subscribers: libcxx-commits

Tags: #libc

Differential Revision: https://reviews.llvm.org/D78405

Adds support for passing a ByVal formal argument completely on the stack
(ie after all argument registers are exhausted).

Differential Revision: https://reviews.llvm.org/D78263

Add two modes to the reproducer replay script that make debugging a
little easier. Verbose mode prints stdout and stderr, regardless of
whether replay was successful. When --failure-only is passed, output is
limited to tests that failed to replay.

This implements zeroing of false lanes for binary operations,
where instead of merging into the first operand vector (_m)
a `select` is placed on the first input vector. This approach
easily translates to the use of the `zeroing movprfx` instruction.

This patch also adds builtins for svabd, svadd, svdiv, svdivr,
svmax, svmin, svmul, svmulh, svub and svsubr.

Reviewers: SjoerdMeijer, efriedma, rovka

Reviewed By: efriedma

Tags: #clang

Differential Revision: https://reviews.llvm.org/D77593

Differential Revision: https://reviews.llvm.org/D78044

memref types with dynamic dimensions do not have a compile-time
known size. They should be mapped to SPIR-V runtime array types.

Differential Revision: https://reviews.llvm.org/D78197

We can use `simctl spawn --standalone` to enable running tests without
the need for an already-booted simulator instance.  This also side-steps
the problem of not having a good place to shutdown the instance after
we are finished with testing.

rdar://58118442

Reviewed By: delcypher

Differential Revision: https://reviews.llvm.org/D78409

DelSet was used to avoid invalidating the current iterator while
modifying the map we are iterating over.

By using an early_inc_range, (which increments to iterator 'early',
allowing us to remove the current element), we can get rid of DelSet.

Reviewers: gilr, rengolin, Ayal, hsaito

Reviewed By: Ayal

Differential Revision: https://reviews.llvm.org/D78420

Summary:
This is guaranteed to be a no-op without the preamble, so should be a
no-op with it too.

Partially fixes https://github.com/clangd/clangd/issues/337
This doesn't yet work for #ifndef guards, which are not recognized in preambles.
see D78038

I can't for the life of me work out how to test this outside clangd.
The original reentrant preamble diagnostic was untested, I added a test
to clangd for that too.

Reviewers: kadircet

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

Tags: #clang

Differential Revision: https://reviews.llvm.org/D78366

Builtins that have the merge type MergeAnyExp or MergeZeroExp,
merge into a 'undef' or 'zero' vector respectively, which enables the
_x and _z behaviour for unary operations.

This patch also adds builtins for svabs and svneg.

Reviewers: SjoerdMeijer, efriedma, rovka

Reviewed By: efriedma

Tags: #clang

Differential Revision: https://reviews.llvm.org/D77591

Summary:
r13 isn't reserved on 32-bit AIX, which is reflected in our calling
convention but not callee saved regs.

Reviewers: sfertile, ZarkoCA, cebowleratibm, jasonliu

Reviewed By: sfertile

Subscribers: lei, wuzish, nemanjai, hiraditya, kbarton, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D77101

https://llvm.discourse.group/t/rfc-add-std-atomic-rmw-op/489

Differensial revision: https://reviews.llvm.org/D78352

This reverts commit cabfcf84.
The patch introduced another bug in the optimization.

Push MBFIWrapper.h include down to BranchFolding.cpp/IfConversion.cpp

Replace with forward declarations or push down to MIRVRegNamerUtils.cpp where necessary.

D77522 changed --warn-backrefs to not warn for linking sandwich
problems (-ldef1 -lref -ldef2). This removed lots of false positives.

However, glibc still has some problems. libc.a defines some symbols
which are normally in libm.a and libpthread.a, e.g. __isnanl/raise.

For a linking order `-lm -lpthread -lc`, I have seen:

```
// different resolutions: GNU ld/gold select libc.a(s_isnan.o) as the definition
backward reference detected: __isnanl in libc.a(printf_fp.o) refers to libm.a(m_isnanl.o)

// different resolutions: GNU ld/gold select libc.a(raise.o) as the definition
backward reference detected: raise in libc.a(abort.o) refers to libpthread.a(pt-raise.o)
```

To facilitate deployment of --warn-backrefs, add --warn-backrefs-exclude= so that
certain known issues (which may be impractical to fix) can be whitelisted.

Deliberate choices:

* Not a comma-separated list (`--warn-backrefs-exclude=liba.a,libb.a`).
  -Wl, splits the argument at commas, so we cannot use commas.
  --export-dynamic-symbol is similar.
* Not in the style of `--warn-backrefs='*' --warn-backrefs=-liba.a`.
  We just need exclusion, not inclusion. For easier build system
  integration, we should avoid order dependency. With the current
  scheme, we enable --warn-backrefs, and indivial libraries can add
  --warn-backrefs-exclude=<glob> to their LDFLAGS.

Reviewed By: psmith

Differential Revision: https://reviews.llvm.org/D77512

  Add DebuggerControllerBase and DefaultController to Dexter
  implements a new architecture that supports new and novel ways of running
  a debugger under dexter.
  Current implementation adds the original default behaviour via the new
  architecture via the DefaultController, this should have NFC.

Reviewers: Orlando

Differential Revision: https://reviews.llvm.org/D76926

We previously tried re-exporting symbols that didn't exist when
exceptions were disabled. Note that building libc++abi without
exceptions still doesn't work when linking against the default-provided
libSystem.dylib, because it transitively depends on libobjc.dylib,
and that requires __gxx_personality_v0. But building libc++abi
with exceptions and libc++ without exceptions does work.