Changes:
 - initializer expressions of constexpr variable are now wraped in a ConstantExpr. this is mainly used for testing purposes. the old caching system has not yet been removed.
 - Add all the missing Serialization and Importing for APValue.
 - Improve dumping of APValue when ASTContext isn't available.
 - Cleanup leftover from last patch.
 - Add Tests for Import and serialization.

Differential Revision: https://reviews.llvm.org/D63640

This is needed to prevent the test from failing when llvm is
configured so that the arm target is not present, which is the case
for some buildbots.

We use the Real vs Pseudo instruction abstraction for other
types of instructions to facilitate changes in opcode
between gpu generations.
This patch introduces that abstraction to SOPC and SOPP.

Reviewed By: rampitec

Differential Revision: https://reviews.llvm.org/D89738

Change-Id: I59d53c2c7058b49d05b60350f4062a9b542d3138

Reviewed By: herhut

Differential Revision: https://reviews.llvm.org/D89686

Reviewed By: herhut

Differential Revision: https://reviews.llvm.org/D89262

The documentation claims that an op with the trait FunctionLike has a
single region containing the blocks that corresponding to the body of
the function. It then goes on to say that the absence of a region
corresponds to an external function when, in fact, this is represented
by a single empty region. This patch changes the wording in the
documentation to match the implementation.

Signed-off-by: Frej Drejhammar <frej.drejhammar@gmail.com>
Co-authored-by: Frej Drejhammar <frej.drejhammar@gmail.com>
Co-authored-by: Klas Segeljakt <klasseg@kth.se>

Reviewed By: ftynse

Differential Revision: https://reviews.llvm.org/D89868

Check the actual maximum supported stack size for a kernel.

Fixes being overly conservative with the register counts in called
functions. This should try to do a conservative range merge, but for
now just clone.

Also fix not being able to functionally run the pass standalone.

[libomptarget][amdgcn] Refactor memcpy to eliminate maps

Builds on D89776 to remove now dead code.

Reviewed By: pdhaliwal

Differential Revision: https://reviews.llvm.org/D89888

Prior to this patch, we would generate a fancy <__config> header by
concatenating <__config_site> and <__config>. This complexifies the
build system and also increases the difference between what's tested
and what's actually installed.

This patch removes that complexity and instead simply installs <__config_site>
alongside the libc++ headers. <__config_site> is then included by <__config>,
which is much simpler. Doing this also opens the door to having different
<__config_site> headers depending on the target, which was impossible before.

It does change the workflow for testing header-only changes to libc++.
Previously, we would run `lit` against the headers in libcxx/include.
After this patch, we run it against a fake installation root of the
headers (containing a proper <__config_site> header). This makes use
closer to testing what we actually install, which is good, however it
does mean that we have to update that root before testing header changes.
Thus, we now need to run `ninja check-cxx-deps` before running `lit` by
hand.

This commit was originally applied in 1e46d1aa and reverted in eb60c487
because it broke the libc++abi and libunwind test suites. This has now
been fixed.

Differential Revision: https://reviews.llvm.org/D89041

Reviewed By: labath

Differential Revision: https://reviews.llvm.org/D89807

The existing help text was very terse and was missing several important
options. In the new version, I add a short description of each option
and a slightly longer description of the tool as a whole.

The new option list does not include undocumented no-op options:
--debug and --verbose. It also does not include undocumented short
aliases for long options, with two exceptions: -h, because it's
well-known; and -S (--setsid), as it's used in one test. Using these
options will now produce an error. I believe that is acceptable as users
aren't generally invoking lldb-server directly, and the only way to
learn about the short aliases was by looking at the source.

Differential Revision: https://reviews.llvm.org/D89477

Reviewed By: emaste

Differential Revision: https://reviews.llvm.org/D89859

Differential Revision: https://reviews.llvm.org/D89822

Differential Revision: https://reviews.llvm.org/D89875

As mentioned post-commit in D85749, the 'substituteDebugValuesForInst'
method added in c521e44d would be better off with a limit on the
number of operands to substitute. This handles the common case of
"substitute the first operand between these two differing instructions",
or possibly up to N first operands.

This temporarily reverts commit 1e46d1aa until I find a solution to fix
the libc++abi and libunwind test suites with that change.

The default implementation base returns TCC_Expensive (currently
set to '4'), so that explains the test diff. This probably does
not make sense for most callers, but at least now the costs will
be consistently wrong instead of mysteriously wrong.

The ARM target has an override that tries to model codegen expansion,
and that should likely be adapted for general usage.

This probably does not affect anything because the vectorizers are
the primary users of the throughput cost, but memcpy is not listed
as a trivially vectorizable intrinsic.

Prior to this patch, we would generate a fancy <__config> header by
concatenating <__config_site> and <__config>. This complexifies the
build system and also increases the difference between what's tested
and what's actually installed.

This patch removes that complexity and instead simply installs <__config_site>
alongside the libc++ headers. <__config_site> is then included by <__config>,
which is much simpler. Doing this also opens the door to having different
<__config_site> headers depending on the target, which was impossible before.

It does change the workflow for testing header-only changes to libc++.
Previously, we would run `lit` against the headers in libcxx/include.
After this patch, we run it against a fake installation root of the
headers (containing a proper <__config_site> header). This makes use
closer to testing what we actually install, which is good, however it
does mean that we have to update that root before testing header changes.
Thus, we now need to run `ninja check-cxx-deps` before running `lit` by
hand.

Differential Revision: https://reviews.llvm.org/D89041

For historical reasons, the R6 register is a callee-saved argument
register. This means that if it is used to pass an argument to a function
that does not clobber it, it is live throughout the function.

This patch makes sure that in this special case any kill flags of it are
removed.

Review: Ulrich Weigand, Eli Friedman

Differential Revision: https://reviews.llvm.org/D89451

Currently, a LIT test named directly (on the command line) will
be run even if the name of the test file does not meet the rules
to be considered a test in the LIT test configuration files for
its test suite. For example, if the test does not have a
recognised file extension.

This makes it relatively easy to write a LIT test that won't
actually be run. I did in: https://reviews.llvm.org/D82567

This patch adds an error to avoid users doing that. There is a
small performance overhead for this check. A command line option
has been added so that users can opt into the old behaviour.

Differential Revision: https://reviews.llvm.org/D83069

https://llvm.org/docs/CodingStandards.html#use-early-exits-and-continue-to-simplify-code

Reviewed By: kadircet

Differential Revision: https://reviews.llvm.org/D89857

This fixes a test failure because a LLVM pipeline test file in clang/
did not get updated in 88241ffb.

[DAG] getNode(ISD::EXTRACT_SUBVECTOR) Drop unnecessary N2C null check - we assert that this isn't null and have already used the pointer. NFCI.

Fixes cppcheck + null dereference warning.

Some instructions may be removable through processes such as IfConversion,
however DefinesPredicate can not be made aware of when this should be considered.
This parameter allows DefinesPredicate to distinguish these removable instructions
on a per-call basis, allowing for more fine-grained control from processes like
ifConversion.

Renames DefinesPredicate to ClobbersPredicate, to better reflect it's purpose

Differential Revision: https://reviews.llvm.org/D88494

Updates an optimization that relies on boolean contents being either 0
or 1 to properly check for this before triggering.

The following:
  (X & 8) != 0 --> (X & 8) >> 3
Produces unexpected results when a boolean 'true' value is represented
by negative one.

Patch by Erik Hogeman.

Differential Revision: https://reviews.llvm.org/D89390

This adds a test covering an issue in bit comparison folding.  The
issue will be addressed in the subsequent commit.

Patch by Erik Hogeman.

Differential Revision: https://reviews.llvm.org/D89390

D89217 did not subtract one when accessing SubRegFromChannelTable in one
place.

Differential Revision: https://reviews.llvm.org/D89804

LLVM assumes that when it creates a call to a C library function it
can use the C calling convention. On ARM the effective calling
convention is determined from the target triple, however using
-mfloat-abi=hard on ARM means that calls to (and definitions of) C
library functions use the arm_aapcs_vfpcc calling convention which can
result in a mismatch.

Fix this by incorporating -mfloat-abi into the target triple, similar
to how -mbig-endian and -march/-mcpu are. This only works for EABI
targets and not Android or iOS, but there the float abi is fixed so
instead give an error.

Fixes PR45524

Differential Revision: https://reviews.llvm.org/D89573

The `Root` member of `ImmutableMapRef` was changed recently from a plain
pointer to `IntrusiveRefCntPtr`. However, the `Profile` member function
was not adjusted. This results in comilation error whenever the
`Profile` method is used on an `ImmutableMapRef`. This patch fixes this
issue and also adds unit tests for `ImmutableMapRef`.

Differential Revision: https://reviews.llvm.org/D89486