When debugging a large program like clang and doing "frame variable
*this", the ValueObject pretty printer is doing hundreds of scoped
FindTypes lookups. The ones that take longest are the ones where the
DWARFDeclContext ends in something like ::Iterator which produces many
false positives that need to be filtered out *after* extracting the
DIEs. This patch demonstrates a way to filter out false positives at
the accerator table lookup step.

With this patch
  lldb clang-10 -o "b EmitFunctionStart" -o r -o "f 2" -o "fr v *this" -b -- ...
goes (in user time) from 5.6s -> 4.8s
or (in wall clock) from 6.9s -> 6.0s.

Differential Revision: https://reviews.llvm.org/D68678

llvm-svn: 374401

Reviewed By: serge-sans-paille

Differential Revision: https://reviews.llvm.org/D68529

llvm-svn: 374400

Summary:
An incorrect assertion is thrown when clang-formatting MSVC's STL library

```
Assertion failed: !Line.startsWith(tok::hash), file C:/llvm/llvm-project/clang/lib/Format/TokenAnnotator.cpp, line 847
Stack dump:
0.      Program arguments: C:\llvm\build\bin\clang-format.exe -i -n ./stl/inc/xkeycheck.h
```

```
Enable warning C4005 to find the forbidden define.
```

Reviewers: mitchell-stellar, STL_MSFT, klimek, krasimir

Reviewed By: mitchell-stellar

Subscribers: cfe-commits

Tags: #clang-format, #clang-tools-extra, #clang

Differential Revision: https://reviews.llvm.org/D68707

llvm-svn: 374399

llvm-svn: 374398

This reverses the scalar canonicalization proposed in D63382.

Pre: isPowerOf2(C1)
%r = select i1 %cond, i32 C1, i32 0
=>
%z = zext i1 %cond to i32
%r = shl i32 %z, log2(C1)

https://rise4fun.com/Alive/Z50

x86 already tries to fold this pattern, but it isn't done
uniformly, so we still see a diff. AArch64 probably should
enable the TLI hook to benefit too, but that's a follow-on.

llvm-svn: 374397

llvm-svn: 374396

llvm-svn: 374395

Differential Revision: https://reviews.llvm.org/D68750

llvm-svn: 374394

When using lit's internal shell, RUN lines like the following
accidentally execute an external `diff` instead of lit's internal
`diff`:

```
 # RUN: program | diff -U1 file -
```

Such cases exist now, in `clang/test/Analysis` for example.  We are
preparing patches to ensure lit's internal `diff` is called in such
cases, which will then fail because lit's internal `diff` doesn't
recognize `-U` as a command-line option.  This patch adds `-U`
support.

Reviewed By: rnk

Differential Revision: https://reviews.llvm.org/D68668

llvm-svn: 374392

llvm-svn: 374391

When using lit's internal shell, RUN lines like the following
accidentally execute an external `diff` instead of lit's internal
`diff`:

```
 # RUN: program | diff file -
```

Such cases exist now, in `clang/test/Analysis` for example.  We are
preparing patches to ensure lit's internal `diff` is called in such
cases, which will then fail because lit's internal `diff` doesn't
recognize `-` as a command-line option.  This patch adds support for
`-` to mean stdin.

Reviewed By: probinson, rnk

Differential Revision: https://reviews.llvm.org/D67643

llvm-svn: 374390

As suggested by rnk at D67643#1673043, instead of reading files
multiple times until an appropriate encoding is found, read them once
as binary, and then try to decode what was read.

For python >= 3.5, don't fail when attempting to decode the
`diff_bytes` output in order to print it.

Finally, add some tests for encoding handling.

Reviewed By: rnk

Differential Revision: https://reviews.llvm.org/D68664

llvm-svn: 374389

When using lit's internal shell, RUN lines like the following
accidentally execute an external `diff` instead of lit's internal
`diff`:

```
 # RUN: program | diff file -
 # RUN: not diff file1 file2 | FileCheck %s
```

Such cases exist now, in `clang/test/Analysis` for example.  We are
preparing patches to ensure lit's internal `diff` is called in such
cases, which will then fail because lit's internal `diff` cannot
currently be used in pipelines and doesn't recognize `-` as a
command-line option.

To enable pipelines, this patch moves lit's `diff` implementation into
an out-of-process script, similar to lit's `cat` implementation.  A
follow-up patch will implement `-` to mean stdin.

Reviewed By: probinson, stella.stamenova

Differential Revision: https://reviews.llvm.org/D66574

llvm-svn: 374388

NVPTX does not support global aliases. Instead, we have to copy the full
body of the variant function for the original function.

llvm-svn: 374387

Before the test reorganization, everything was part of a single test
suite with a single module cache. Now that things are properly separated
this is no longer the case. Only the shell tests inherited the logic to
properly configure and wipe the module caches. This patch adds that
logic back for the API tests. While doing so, I noticed that we were
configuring a Clang module cache in CMake, but weren't actually using it
from dotest.py. I included a fix for that in this patch as well.

Differential revision: https://reviews.llvm.org/D68755

llvm-svn: 374386

Pass the DSYMUTIL and SDKROOT variables on the command line instead of
the environment. This makes it easier to reproduce the make invocation
during development.

Differential revision: https://reviews.llvm.org/D68812

llvm-svn: 374385

Updated: Removed offending TODO comment.

Dereferences with addresses above the 48-bit hardware addressable range
produce "invalid instruction" (instead of "invalid access") hardware
exceptions (there is no hardware address decoding logic for those bits),
and the address provided by this exception is the address of the
instruction (not the faulting address).  The kernel maps the "invalid
instruction" to SEGV, but fails to provide the real fault address.

Because of this ASan lies and says that those cases are null
dereferences.  This downgrades the severity of a found bug in terms of
security.  In the ASan signal handler, we can not provide the real
faulting address, but at least we can try not to lie.

rdar://50366151

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D68676

> llvm-svn: 374265

llvm-svn: 374384

llvm-svn: 374383

We don't actually need the section content for this tests.

llvm-svn: 374382

This patch adds the ability to create GSYM files with GsymCreator, and read them with GsymReader. Full testing has been added for both new classes.

This patch differs from the original patch https://reviews.llvm.org/D53379 in that is uses a StringTableBuilder class from llvm instead of a custom version. Support for big and little endian files has been added. If the endianness matches the current host, we use efficient extraction for the header, address table and address info offset tables.

Differential Revision: https://reviews.llvm.org/D68744

llvm-svn: 374381

This seems like a more natural place to clear the vector, especially
since this method is clearing other data structures as well.

llvm-svn: 374378

Same as VQADD, VQSUB can be selected from llvm.ssub.sat intrinsics.

Differential Revision: https://reviews.llvm.org/D68567

llvm-svn: 374377

If this doesn't actually work, I'll revert the change and just disable
the remaining thee pexpect tests under asan.

llvm-svn: 374375

Summary: Also fix an error found with LLVM_USE_SANITIZER=Address.

Reviewers: nelhage

Subscribers: libc-commits

Tags: #libc-project

Differential Revision: https://reviews.llvm.org/D68761

llvm-svn: 374374

The default promotion for the add_sat/sub_sat nodes currently does:
   1. ANY_EXTEND iN to iM
   2. SHL by M-N
   3. [US][ADD|SUB]SAT
   4. L/ASHR by M-N
If the promoted add_sat or sub_sat node is not legal, this can produce code
that effectively does a lot of shifting (and requiring large constants to be
materialised) just to use the overflow flag. It is simpler to just do the
saturation manually, using the higher bitwidth addition and a min/max against
the saturating bounds. That is what this patch attempts to do.

Differential Revision: https://reviews.llvm.org/D68643

llvm-svn: 374373

llvm-svn: 374372

llvm-svn: 374371

llvm-svn: 374370

Summary:
This is patch is part of a series to introduce an Alignment type.
See this thread for context: http://lists.llvm.org/pipermail/llvm-dev/2019-July/133851.html
See this patch for the introduction of the type: https://reviews.llvm.org/D64790

Reviewers: courbet

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D68786

llvm-svn: 374369

Previously, patchable extern relocations are introduced to patch
external variables used for multi versioning in
compile once, run everywhere use case. The load instruction
will be converted into a move with an patchable immediate
which can be changed by bpf loader on the host.

The kernel verifier has evolved and is able to load
and propagate constant values, so compiler relocation
becomes unnecessary. This patch removed codes related to this.

Differential Revision: https://reviews.llvm.org/D68760

llvm-svn: 374367

In openFileForRead don't cache erroneous entries if the error relates to them being directories. Add tests.

Summary:
It seems that when the CachingFileSystem is first given a file to open that is actually a directory, it incorrectly
caches that path to be errenous and throws an error when subsequently a directory open call is made for the same
path.
This change makes it so that we do NOT cache a path if it turns out we asked for a file when its a directory.

Reviewers: arphaman

Subscribers: dexonsmith, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D68193

llvm-svn: 374366

llvm-svn: 374365

llvm-svn: 374364

No need to store multiple copies of the same vendor names in the context
selector, keep only single copy.

llvm-svn: 374363

Differential Revision: https://reviews.llvm.org/D68396

llvm-svn: 374362

Summary:
As disscused in https://bugs.llvm.org/show_bug.cgi?id=43219,
i believe it may be somewhat useful to show //some// aggregates
over all the sea of statistics provided.

Example:
```
Average Wait times (based on the timeline view):
[0]: Executions
[1]: Average time spent waiting in a scheduler's queue
[2]: Average time spent waiting in a scheduler's queue while ready
[3]: Average time elapsed from WB until retire stage

      [0]    [1]    [2]    [3]
0.     3     1.0    1.0    4.7       vmulps     %xmm0, %xmm1, %xmm2
1.     3     2.7    0.0    2.3       vhaddps    %xmm2, %xmm2, %xmm3
2.     3     6.0    0.0    0.0       vhaddps    %xmm3, %xmm3, %xmm4
       3     3.2    0.3    2.3       <total>
```
I.e. we average the averages.

Reviewers: andreadb, mattd, RKSimon

Reviewed By: andreadb

Subscribers: gbedwell, arphaman, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D68714

llvm-svn: 374361

This reverts commit r374339. It broke tests:
http://lab.llvm.org:8011/builders/clang-x86_64-debian-fast/builds/19066

llvm-svn: 374359

This reverts commit r374343. It broke tests:
http://lab.llvm.org:8011/builders/clang-x86_64-debian-fast/builds/19066

llvm-svn: 374358

This reverts commit r374346. It attempted to fix OCaml tests, but is
does not actually fix them.

llvm-svn: 374357

Split off from D67557.

llvm-svn: 374356