This patch adds three functions to the C API:
- mlirAttributeIsALocation: returns true if the attribute is a LocationAttr,
  false otherwise.
- mlirLocationGetAttribute: returns the underlying LocationAttr of a Location.
- mlirLocationFromAttribute: gets a Location from a LocationAttr.

Reviewed By: mikeurbach, Mogball

Differential Revision: https://reviews.llvm.org/D142182

Reviewed By: michaelrj

Differential Revision: https://reviews.llvm.org/D142509

If we know that x is nonzero and not a power of 2, then
llvm::findLastSet(x) + 1 is the index of the bit just above the
highest set bit in x.  That is, 1 << (llvm::findLastSet(x) + 1) is the
same as llvm::bit_ceil(x).

Since llvm::bit_ceil is a nop on a power of 2, we can unconditionally
call llvm::bit_ceil.  The end result actually matches the comment.

If x is known to be nonzero, findLastSet(x) returns the index of the
highest set bit counting from the LSB, so 1 << findLastSet(x) is the
same as llvm::bit_floor(x).

Sometimes memory addresses are treated as immediate values. Thus
immediate operands have to be relocatable.

Differential Revision: https://reviews.llvm.org/D137902

32-bit immediates require special cares because they go across the
normal word (16 bits) boundaries.
This patch also fixes some incorrect disassembler test cases.

Differential Revision: https://reviews.llvm.org/D142080

Just like the encoder directive for variable-length instructions, this
patch adds a new decoder directive to allow custom decoder function on
an operand.

Right now, due to the design of DecoderEmitter each operand can only
have a single custom decoder in a given instruction.

Differential Revision: https://reviews.llvm.org/D142079

zero-call-used-regs pass generate an xor instruction to help mitigate
return-oriented programming exploits via zeroing out used registers. But
in this below test case with -g option there is dbg.value instruction
associating the register with the debug-info description of the formal
parameter d, which makes the register appear used, therefore it zero the
register edi in -g case and makes binary different from without -g option.

The pass should be looking only at the non-debug uses.

$ cat test.c
char a[];
int b;
__attribute__((zero_call_used_regs("used"))) char c(int d) {
  *a = ({
    int e = d;
    b;
  });
}

This fixes https://github.com/llvm/llvm-project/issues/57962.

Differential Revision: https://reviews.llvm.org/D138757

This reverts commit de122cb9.

This change causes assertion failures in many of our internal tests.
I have filed #60280 for this issue.

This reverts commit 4240c914.

The current solution won't work since getLocalOrGlobal does not
support returning a vector. More work needs to be put into
ensuring both the local and global way of setting the options
are available during the transition period.

This rewrite fixes https://github.com/llvm/llvm-project/issues/59316.

Previously LowerSwitch uses int64_t, which will crash on case branches using integers with more than 64 bits.
Using APInt fixes this problem. This patch also includes a test

Reviewed By: RKSimon

Differential Revision: https://reviews.llvm.org/D140747

As discussed in https://github.com/llvm/llvm-project/issues/59901

This change is not NFC. There is one SCEV and EarlyCSE test that have an
improved analysis/optimization case. Rest of the tests are not failing.

I've mostly only added cleanup to SCEV since that is where this issue
started. As a follow up, I believe there is more cleanup opportunity in
SCEV and other affected passes.

There could be cases where there are missed registerAssumption of
guards, but this case is not so bad because there will be no
miscompilation. AssumptionCacheTracker should take care of deleted
guards.

Differential Revision: https://reviews.llvm.org/D142330

In Clang, in order to determine the type of `omp_allocator_handle_t`, Clang
checks the type of those predefined allocators. The first one it checks is
`omp_null_allocator`. If the language is C, and the system is 64-bit, what Clang
gets is a `int`, instead of an enum of size 8, given the fact how we define
`omp_allocator_handle_t` in `omp.h`.  If the allocator is captured by a region,
let's say a parallel region, the allocator will be privatized. Because Clang deems
`omp_allocator_handle_t` as an `int`, it will first cast the value returned by
the runtime library (for `libomp` it is a `void *`) to `int`, and then in the
outlined function, it casts back to `omp_allocator_handle_t`. This two casts
completely shaves the first 32-bit of the pointer value returned from `libomp`,
and when the private "new" pointer is fed to another runtime function
`__kmpc_allocate()`, it causes segment fault. That is the root cause of PR54082.
I have no idea why `-fno-pic` could hide this bug.

In this patch, we detect `omp_allocator_handle_t` using roughly the same method
as `omp_event_handle_t`, by looking it up into the identifier table.

Fix #54082.

Reviewed By: ABataev

Differential Revision: https://reviews.llvm.org/D142297

LLDB only supports Python3 now, so the `six` shim for Python2 is no longer necessary.

Reviewed By: JDevlieghere

Differential Revision: https://reviews.llvm.org/D142140

Otherwise we may be inserting a decl into a DeclContext that's not fully defined yet.

This simplifies/removes some clang AST node creation code. Instead, use
clang::printTemplateArgumentList().

Reviewed By: Michael137

Differential Revision: https://reviews.llvm.org/D142413

Summary:
This test has a negative check for an extra file. it turns out that
sometimes the temp name can match it. Be more specific with it.

When `libomp` is initialized, it creates a temp file in `/dev/shm` to store
registration flag. Some systems, like Android, don't have `/dev/shm`, then this
feature is disabled by the macro `KMP_USE_SHM`, though most Linux distributions
have that. However, some customized distribution, such as the one reported in
https://github.com/llvm/llvm-project/issues/53955, doesn't support it either.
It causes a core dump. In this patch, if it is the case, we will try to create a
temporary file in `/tmp`, and if it still doesn't make it, then we error out.
Note that we don't consider in this patch if the temporary directory has been
set to `TMPDIR` in this patch. If `/tmp` is not accessible, we error out.

Fix #53955.

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D142175

To prevent potential bugs in situations where we want to peek the next
non-comment token.

Differential Revision: https://reviews.llvm.org/D142412

This changes the mechanism for verbose termination (again!) to make it
support compile-time customization in addition to link-time customization,
which is important for users who need fine-grained control over what code
gets generated around sites that call the verbose termination handler.

This concern had been raised to me both privately by prospecting users
and in https://llvm.org/D140944, so I think it is clearly worth fixing.

We still support _LIBCPP_AVAILABILITY_CUSTOM_VERBOSE_ABORT_PROVIDED for
a limited time since the same functionality can be achieved by overriding
the _LIBCPP_VERBOSE_ABORT macro.

Differential Revision: https://reviews.llvm.org/D141326

The stage1 and stage2 builds aren't packaged, so we only need to build
enough of the toolchain to build the next phase.

Reviewed By: thieta, amyk

Differential Revision: https://reviews.llvm.org/D141552

This patch remove xfail decorator from
builtins/Unit/trampoline_setup_test.c as it is passing on Windows/AArch64
nowz. It is being skipped in code with __clang__ not defined.

https://lab.llvm.org/buildbot/#/builders/120/builds/3873

If we're extracting an element and inserting into a undef vector
with the same number of elements, we can use the original vector.

This pattern occurs around reductions that have been cascaded
together.

This can be generalized to wider/narrow vectors by using
insert_subvector/extract_subvector, but we don't have lit tests
for that case currently.

We can also support non-undef before by using a slide or vmv.v.v

Reviewed By: reames

Differential Revision: https://reviews.llvm.org/D142264

Remove __unexpected namespace.

Reviewed By: philnik, #libc, ldionne

Differential Revision: https://reviews.llvm.org/D141947

This is what ld64 does, and also what we already do for most of the
other load commands. I'm not aware of a good way to test this, but I
don't think it really matters.

Differential Revision: https://reviews.llvm.org/D141462

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D142504

2db6b34e introduces circular dependency on llvm::ArrayRef. By
inspecting commit history, it appears that we have some issue using
deduction guide on std::array. Why don't we try std::array with explicit
template arguments?

Differential revision: https://reviews.llvm.org/D141352

The check for "no SOURCE_DATE_EPOCH" wasn't especially interesting, and
I am not aware of a _portable_ way to unset and environment variable in
a lit test. So remove it since it can fail if the build environment has
SOURCE_DATE_EPOCH set globally.

Differential Revision: https://reviews.llvm.org/D142511

In some binaries produced with ThinLTO there are CUs that share entry in
.debug_addr. Before we would generate a new entry for each. Which lead to binary
size increase. This changes the behavior so that we re-use entries in
.debug_addr.

Reviewed By: maksfb

Differential Revision: https://reviews.llvm.org/D142425

Adds the RFFT2d TOSA operation and supporting
shape inference function.

Signed-off-by: Luke Hutton <luke.hutton@arm.com>
Change-Id: I7e49c47cdd846cdc1b187545ef76d5cda2d5d9ad

Reviewed By: jpienaar

Differential Revision: https://reviews.llvm.org/D142336

[ASan] Introduce a flag -asan-constructor-kind to control the generation of the Asan module constructor.

By default, ASan generates an asan.module_ctor function that initializes asan and
registers the globals in the module. This function is added to the
@llvm.global_ctors array. Previously, there was no way to control the
generation of this function.

This patch adds a way to control the generation of this function. The
flag -asan-constructor-kind has two options:

global: This is the default option and the default behavior of ASan. It generates an
asan.module_ctor function.
none: This skips the generation of the asan.module_ctor function.

rdar://104448572

Differential revision: https://reviews.llvm.org/D142505

rdar://103570533

Differential Revision: https://reviews.llvm.org/D142243

This patch implements the memory lock/unlock API, introduced in patch https://reviews.llvm.org/D139208,
in the NextGen plugins. Locked buffers feature reference counting and we allow certain overlapping. Given
an already locked buffer A, other buffers that are fully contained inside A can be locked again, even if
they are smaller than A. In this case, the reference count of locked buffer A will be incremented. However,
extending an existing locked buffer is not allowed. The original buffer is actually unlocked once all its
users have released the locked buffer and sub-buffers (i.e., the reference counter becomes zero).

Differential Revision: https://reviews.llvm.org/D141227

Very similar to https://reviews.llvm.org/D111272. We very often can
evaluate calls to llvm.objectsize.* regardless of inlining. Don't count
calls to llvm.objectsize.* against the InlineCost when we can evaluate
the call to a constant.

Link: https://github.com/ClangBuiltLinux/linux/issues/1302

Reviewed By: manojgupta

Differential Revision: https://reviews.llvm.org/D111456

Summary:
Forgot to add this.

The AMDGPU target can only emit LLVM-IR, so we can always rely on LTO to
link the static version of the runtime optimally. Using the static
library only has a few advantages. Namely, it avoids several known bugs
and allows us to optimize out more functions. This is legal since the
changes in D142486 and D142484

Depends on D142486 D142484

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D142491

Currently we have two versions of the static library. One is built as
individual bitcode files and linked via `-mlink-builtin-bitcode`. The
other is built as a single static archive `omptarget.devicertl.a` and is
linked via `-lomptarget.devicertl` and handled by the linker wrapper
during LTO. We use the former in the case that we are not performing
LTO, because linking the library late wouldn't allow us to optimize the
runtime library effectively. The support in D142484 allows us to
unconditionally link this library, so it will only be pulled in if
needed. That is, if we linked already via `-mlink-builtin-bitcode` then
we will not pull in the static library even if it's linked on the
command line.

Depends on D142484

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D142486