Changes

[Builtins] Downgrade duplicate source file warning from a fatal error to
a warning.
This is a follow up to r375150 to unbreak the `clang-ppc64be-linux` bot. 
The commit caused running the tests to fail due to
``` llvm-lit:
/home/buildbots/ppc64be-clang-multistage-test/clang-ppc64be-multistage/llvm/projects/compiler-rt/test/builtins/Unit/lit.cfg.py:116: 
fatal: builtins_source_features contains duplicates:
['librt_has_divtc3']
```
This commit should be reverted once the build system bug for powerpc is 
fixed.
llvm-svn: 375162

Revert "[LLDB] [test] Use %clang_cl instead of build.py in a few tests"
This reverts SVN r375156, as it seems to have broken tests when run on
macOS:
http://green.lab.llvm.org/green/view/LLDB/job/lldb-cmake/2706/console
llvm-svn: 375163

Reland "[lit] Synthesize artificial deadline"
We always want to use a deadline when calling `result.await`.  Let's 
synthesize an artificial deadline (now plus one year) to simplify code 
and do less busy waiting.
Thanks to Reid Kleckner for diagnosing that a deadline for of "positive 
infinity" does not work with Python 3 anymore.  See commit: 
4ff1e34b606d9a9fcfd8b8b5449a558315af94e5
I tested this patch with Python 2 and Python 3.
llvm-svn: 375165

libhwasan initialisation include kernel syscall ABI relaxation
Summary: Until now AArch64 development has been on patched kernels that
have an always on relaxed syscall ABI where tagged pointers are
accepted. The patches that have gone into the mainline kernel rely on
each process opting in to this relaxed ABI.
This commit adds code to choose that ABI into __hwasan_init.
The idea has already been agreed with one of the hwasan developers
(http://lists.llvm.org/pipermail/llvm-dev/2019-September/135328.html).
The patch ignores failures of `EINVAL` for Android, since there are
older versions of the Android kernel that don't require this `prctl` or
even have the relevant values.  Avoiding EINVAL will let the library run
on them.
I've tested this on an AArch64 VM running a kernel that requires this 
prctl, having compiled both with clang and gcc.
Patch by Matthew Malcomson.
Reviewers: eugenis, kcc, pcc
Reviewed By: eugenis
Subscribers: srhines, kristof.beyls, #sanitizers, llvm-commits
Tags: #sanitizers, #llvm
Differential Revision: https://reviews.llvm.org/D68794
llvm-svn: 375166

[OPENMP]Dow not emit warnings for uninitialized loop counters.
In OpenMP constructs all counters are initialized and we should not emit 
warnings about uninitialized privatized loop control variables.
llvm-svn: 375167

[llvm-objcopy] Add support for shell wildcards
Summary: GNU objcopy accepts the --wildcard flag to allow wildcard
matching on symbol-related flags. (Note: it's implicitly true for
section flags).
The basic syntax is to allow *, ?, \, and [] which work similarly to how
they work in a shell. Additionally, starting a wildcard with ! causes
that wildcard to prevent it from matching a flag.
Use an updated GlobPattern in libSupport to handle these patterns. It
does not fully match the `fnmatch` used by GNU objcopy since named
character classes (e.g. `[[:digit:]]`) are not supported, but this
should support most existing use cases (mostly just `*` is what's used
anyway).
Reviewers: jhenderson, MaskRay, evgeny777, espindola, alexshap
Reviewed By: MaskRay
Subscribers: nickdesaulniers, emaste, arichardson, hiraditya,
jakehehrlich, abrachet, seiya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66613
llvm-svn: 375169

Adapt Windows test to API change.
llvm-svn: 375170

[lit] Move computation of deadline up into base class
llvm-svn: 375171

[test] Add a .clang-format file for the shell test.
The API tests have a .clang-format file that disables formatting 
altogether. While this is needed for some tests, it also leads to 
inconsistency between test files. The shell tests suffer from a similar 
problem: a test with a source-file extension (.c, .cpp) will get 
formatted, potentially breaking up lines and leading to invalid RUN 
commands.
Rather than completely disabling formatting here, I propose to not 
enforce a line limit instead. That way tests will be consistent, but you 
can still have long run commands (as is not uncommon in LLVM either) and 
use breakpoints with patters that extend beyond 80 cols.
Differential revision: https://reviews.llvm.org/D69058
llvm-svn: 375172

[lldb] X-fail tests that use constructors in expressions on Windows
These tests were testing a bug related to constructors. It seems that on
Windows the expression command can't construct objects (or at least, 
call their constructor explicitly which is required for the tests), so 
this is just x-failing them until Windows actually supports constructor
calls.
llvm-svn: 375173

(NFC) Delete variable made unused by llvm-svn: 375160
Reviewers: aprantl
Subscribers: llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D69143
llvm-svn: 375174

[AMDGPU] drop getIsFP td helper
We already have isFloatType helper, and they are out of sync. Drop one
and merge the type list.
Differential Revision: https://reviews.llvm.org/D69138
llvm-svn: 375175

[Error] Make llvm::cantFail include the original error messages
Summary: The current implementation eats the current errors and just
outputs the message parameter passed to llvm::cantFail.  This change
appends the original error message(s), so the user can see exactly why 
cantFail failed.  New logic is conditional on NDEBUG.
Reviewed By: lhames
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D69057
llvm-svn: 375176

[clang-offload-wrapper][NFC] Use captured name of the entry type in LIT
test
Differential Revision: https://reviews.llvm.org/D69140
llvm-svn: 375177

Reland [llvm-objdump] Use a counter for llvm-objdump -h instead of the
section index.
This relands r374931 (reverted in r375088). It fixes 32-bit builds by
using the right format string specifier for uint64_t (PRIu64) instead of
`%d`.
Original description:
When listing the index in `llvm-objdump -h`, use a zero-based counter
instead of the actual section index (e.g. shdr->sh_index for ELF).
While this is effectively a noop for now (except one unit test for
XCOFF), the index values will change in a future patch that filters
certain sections out (e.g. symbol tables). See D68669 for more context.
Note: the test case in `test/tools/llvm-objdump/X86/section-index.s`
already covers the case of incrementing the section index counter when
sections are skipped.
Reviewers: grimar, jhenderson, espindola
Reviewed By: grimar
Subscribers: emaste, sbc100, arichardson, aheejin, arphaman, seiya,
llvm-commits, MaskRay
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D68848
llvm-svn: 375178

[ARM] Fix arm_neon.h with -flax-vector-conversions=none, part 3
It's completely impossible to check that I've actually found all the 
issues, due to the use of macros in arm_neon.h, but hopefully this time 
it'll take more than a few hours for someone to find another issue.
I have no idea why, but apparently there's a rule that some, but not 
all, builtins which should take an fp16 vector actually take an int8 
vector as an argument.  Fix this, and add test coverage.
Differential Revision: https://reviews.llvm.org/D68838
llvm-svn: 375179

DebugInfo: Remove unused parameter (from
DwarfDebug.cpp:emitListsTableHeaderStart)
llvm-svn: 375180

clean up the implementation of PythonCallable::GetNumArguments
Summary: The current implementation of PythonCallable::GetNumArguments 
is not exception safe, has weird semantics, and is just plain incorrect
for some kinds of functions.
Python 3.3 introduces inspect.signature, which lets us easily query for
function signatures in a sane and documented way.
This patch leaves the old implementation in place for < 3.3, but uses
inspect.signature for modern pythons.   It also leaves the old weird
semantics in place, but with FIXMEs grousing about it.   We should
update the callers and fix the semantics in a subsequent patch.    It
also adds some tests.
Reviewers: JDevlieghere, clayborg, labath, jingham
Reviewed By: labath
Subscribers: lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D68995
llvm-svn: 375181

eliminate one form of PythonObject::Reset()
Summary: I'd like to eliminate all forms of Reset() and all public
constructors on these objects, so the only way to make them is with
Take<> and Retain<> and the only way to copy or move them is with actual
c++ copy, move, or assignment.
This is a simple place to start.
Reviewers: JDevlieghere, clayborg, labath, jingham
Reviewed By: labath
Subscribers: lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D69080
llvm-svn: 375182

DebugInfo: Move loclist base address from DwarfFile to DebugLocStream
There's no need to have more than one of these (there can be two 
DwarfFiles - one for the .o, one for the .dwo - but only one loc/loclist 
section (either in the .o or the .dwo) & certainly one per 
DebugLocStream, which is currently singular in DwarfDebug)
llvm-svn: 375183

[analyzer] exploded-graph-rewriter: Make node headers a bit lighter.
The 50% grey color is too dark on some monitors.
llvm-svn: 375184

[analyzer] Display cast kinds in program point dumps.
Because cast expressions have their own hierarchy, it's extremely useful 
to have some information about what kind of casts are we dealing with.
llvm-svn: 375185

[analyzer] Assign truly stable identifiers to exploded nodes.
ExplodedGraph nodes will now have a numeric identifier stored in them 
which will keep track of the order in which the nodes were created and
it will be fully deterministic both accross runs and across machines.
This is extremely useful for debugging as it allows reliably setting 
conditional breakpoints by node IDs.
llvm-svn: 375186

[lldb][NFC] Fix typo in DWARFASTParserClang.cpp
llvm-svn: 375187

[analyzer] exploded-graph-rewriter: Fix typo in r375186. Unbreaks tests.
llvm-svn: 375189