r290874 enabled the s390x test, which caused the rest of the tests to start
misbehaving. This is because this test switches the selected platform and the
change persists.

This fixes it by explicitly resetting the platform in a similar way to the gcore
tests do. Potentially we should consider re-setting the platform globally
between each test run to better protect tests from each other.

llvm-svn: 290890

Differential revision: https://reviews.llvm.org/D27576

Reviewers: EricWF
llvm-svn: 290889

r281179 Introduced an externally threaded variant of the libc++ library. This
patch adds support for a similar library variant for libc++abi.

Differential revision: https://reviews.llvm.org/D27575

Reviewers: EricWF
llvm-svn: 290888

This commit fixes a crash that occurs when -print-decl-contexts AST consumer
tries to print an unhandled declaration.

rdar://19467234

Differential Revision: https://reviews.llvm.org/D26964

llvm-svn: 290887

This commit fixes a crash that occurs when -print-decl-contexts AST consumer
tries to print an unhandled declaration.

rdar://19467234

Differential Revision: https://reviews.llvm.org/D26964

llvm-svn: 290886

This commit fixes a crash that occurs when -print-decl-contexts AST consumer
tries to print an unhandled declaration.

rdar://19467234

Differential Revision: https://reviews.llvm.org/D26964

llvm-svn: 290885

This commit fixes a crash that occurs when -print-decl-contexts AST consumer
tries to print an unhandled declaration.

rdar://19467234

Differential Revision: https://reviews.llvm.org/D26964

llvm-svn: 290884

Summary:
modernize-pass-by-value doesn't warn about value parameters that
cannot be moved, so performance-unnecessary-value-param should.

Reviewers: aaron.ballman, flx, alexfh

Subscribers: JDevlieghere, cfe-commits

Differential Revision: https://reviews.llvm.org/D28022

llvm-svn: 290883

This commit fixes a crash that occurs when -print-decl-contexts AST consumer
tries to print an unhandled declaration.

rdar://19467234

Differential Revision: https://reviews.llvm.org/D26964

llvm-svn: 290882

This commit fixes a crash that occurs when -print-decl-contexts AST consumer
tries to print an unhandled declaration.

rdar://19467234

Differential Revision: https://reviews.llvm.org/D26964

llvm-svn: 290881

This commit fixes a crash that occurs when -print-decl-contexts AST consumer
tries to print an unhandled declaration.

rdar://19467234

Differential Revision: https://reviews.llvm.org/D26964

llvm-svn: 290880

with arguments

rdar://21014571

Differential Revision: https://reviews.llvm.org/D27039

llvm-svn: 290879

 after r290850

Before r290850, building libcxx with -DLIBCXX_HAS_EXTERNAL_THREAD_API=ON had two
uses:
  - Allow platform vendors to plug-in an __external_threading header which
    should take care of the entire threading infrastructure of libcxx

  - Allow testing of an externally-threaded library build; where the thread API
    is declared using pthread data structures, and the implementation of this
    API is provided as a separate library (test/support/external_threads.cpp)
   and linked-in when running the test suite.

r290850 breaks the second use case (pthread data structures are no longer
available). This patch re-stores the ability to build+test an
externally-threaded library variant on a pthread based system.

llvm-svn: 290878

llvm-svn: 290877

llvm-svn: 290876

llvm-svn: 290875

Summary:
This patch changes and simplifies the way notes are read from Linux Elf cores.
The current implementation copies the bytes from the notes directly over the lldb structure for 64 bit cores and reads field by field for 32 bit cores. Reading the bytes directly only works if the endianess of the core dump and the platform that lldb are running on matches. The case statements for s390x and x86_64 would would only work on big endian systems and little endian systems respectively. That meant that x86_64 generally worked but s390x didn't unless you were on s390x or another big endian platform.
This patch just reads field by field on all platform and updates the field by field version to allow for those fields which are word size instead of fixed size. It should also slightly simplify adding support for a new Linux platform.

This patch also re-enables the s390x test case in TestLinuxCore.py on all non-s390x platforms as it now passes.

Reviewers: uweigand, clayborg

Differential Revision: https://reviews.llvm.org/D27571

llvm-svn: 290874

Summary:
Instead of moving all the helper declarations blindly, this patch
implements an AST-based call graph solution to make clang-move only move used
helper decls to new.cc and remove unused decls in old.cc.

Depends on D27674.

Reviewers: ioeric

Subscribers: mgorny, cfe-commits

Differential Revision: https://reviews.llvm.org/D27673

llvm-svn: 290873

[X86] Move 128-bit shuffle mask widening check into lowerV2X128VectorShuffle to reduce code duplication. Use the now available widened mask to simplify some code inside lowerV2X128VectorShuffle.

llvm-svn: 290872

[AVX-512] Simplify the code added in r290870 to recognized 256-bit subvector inserts and avoid calling isShuffleEquivalent on a widened mask.

llvm-svn: 290871

[AVX-512] Teach shuffle lowering to use vinsert instructions for shuffles corresponding to 256-bit subvector inserts.

llvm-svn: 290870

llvm-svn: 290869

[AVX-512] Re-generate tests that were updated for r290663 without using update_llc_test_checks.py so duplicate check lines weren't merged.

llvm-svn: 290868

llvm-svn: 290867

llvm-svn: 290866

[AVX-512] Add support for pushing bitcasts through INSERT_SUBVEC in order to select a masked operation.

llvm-svn: 290865

[AVX-512] Remove vinsert intrinsics and autoupgrade to native shufflevectors. There are some codegen problems here that I'll try to fix in future commits.

llvm-svn: 290864

[AVX-512] Remove vextract intrinsics and autoupgrade to native shufflevectors. This unfortunately generates some really terrible code without VLX support due to v2i1 and v4i1 not being legal.

Hopefully we can improve that in future patches.

llvm-svn: 290863

This patch is to implement sema and parsing for 'target teams distribute parallel for simd’ pragma.

Differential Revision: https://reviews.llvm.org/D28202

llvm-svn: 290862

Summary:
If you decide to recompile parts of your Linux distro with XRay, it may
be useful to know which trace belongs to which binary.  While there, get
rid of the incorrect strncat() usage; it always returns a pointer to the
start which makes that if() always true.  Replace with snprintf which is
bounded so that enough from both strings fits nicely.

Reviewers: dberris

Subscribers: danalbert, srhines, kubabrecka, mgorny, llvm-commits

Differential Revision: https://reviews.llvm.org/D27912

llvm-svn: 290861

DAGCombine already does these.

llvm-svn: 290860

fma (fneg x), (fneg y), z -> fma x, y, z
fma (fabs x), (fabs x), z -> fma x, x, z

llvm-svn: 290859

Summary:
No need to have this per-architecture.  While there, unify 32-bit ARM's
behaviour with what changed elsewhere and start function names lowercase
as per the coding standards.  Individual entry emission code goes to the
entry's own class.

Fully tested on amd64, cross-builds on both ARMs and PowerPC.

Reviewers: dberris

Subscribers: aemerson, llvm-commits

Differential Revision: https://reviews.llvm.org/D28209

llvm-svn: 290858

Update the configuration to reflect the style more accurately.  Pointers
are tied to the left.  Braces are split on classes/structs and
functions.

llvm-svn: 290857

THe previous change replaced the use of `cat` or `type` with a custom
python script.  Remove the now unused command determining.

llvm-svn: 290856

This reverts rL290852 as it breaks aarch64 and arm.

llvm-svn: 290854

llvm-svn: 290853

Summary:
In this change we introduce the notion of a "flight data recorder" mode
for XRay logging, where XRay logs in-memory first, and write out data
on-demand as required (as opposed to the naive implementation that keeps
logging while tracing is "on"). This depends on D26232 where we
implement the core data structure for holding the buffers that threads
will be using to write out records of operation.

This implementation only currently works on x86_64 and depends heavily
on the TSC math to write out smaller records to the inmemory buffers.

Also, this implementation defines two different kinds of records with
different sizes (compared to the current naive implementation): a
MetadataRecord (16 bytes) and a FunctionRecord (8 bytes). MetadataRecord
entries are meant to write out information like the thread ID for which
the metadata record is defined for, whether the execution of a thread
moved to a different CPU, etc. while a FunctionRecord represents the
different kinds of function call entry/exit records we might encounter
in the course of a thread's execution along with a delta from the last
time the logging handler was called.

While this implementation is not exactly what is described in the
original XRay whitepaper, this one gives us an initial implementation
that we can iterate and build upon.

Reviewers: echristo, rSerge, majnemer

Subscribers: mehdi_amini, llvm-commits, mgorny

Differential Revision: https://reviews.llvm.org/D27038

llvm-svn: 290852

Provide a strerror_r replacement for Windows.  This is needed to build
libc++ for Windows with threading.

llvm-svn: 290851

Refactor the header to allow us to implement alternate threading models
with alternate data structures.  Take the opportunity to clang-format
the area.  This will allow us to avoid re-declaring the interfaces for
Win32 threading.  NFC

llvm-svn: 290850