Libc++ tried accomodating systems that need to be able to define various
__need_FOO macros before including C library headers, however it does not
appear to be needed anymore in most cases. Indeed, glibc used to use that
system to conditionally provide definitions, however almost all instances
of these macros have been removed from glibc years ago.

I think the next step would be to also fix Clang's own builtin headers
to stop needing these macros.

Differential Revision: https://reviews.llvm.org/D131425

resolve conflicts

Differential Revision: https://reviews.llvm.org/D138282

Before this patch, the code enumerated `getCondFromBranch`, `getCondFromSETCC` and `getCondFromFromCMov` to get the condition code of a `MachineInstr`, and assigned the result to variable `OldCC` when `MI || IsSwapped || ImmDelta != 0` was satisfiled.

After this patch, the `if-else` structure is eliminated by using `getCondFromMI`. Since `OldCC` is only used when  `MI || IsSwapped || ImmDelta != 0`  is true, it is initialized with `getCondFromMI` directly outside the scope of `if` now.

Reviewed By: pengfei

Differential Revision: https://reviews.llvm.org/D138349

Shift is 0 for all non comments, maybe even for comments. Don't add the
0 up to three times.

Differential Revision: https://reviews.llvm.org/D138357

This sort of amends cdbe2968

Differential Revision: https://reviews.llvm.org/D138356

Done by clang-format itself.

Differential Revision: https://reviews.llvm.org/D138354

Original [RFC](discourse.llvm.org/t/rfc-primitive-ops-add-broadcastop-to-linalg/66313) defined `dimensions` as a map from input to init, but a discussion in reviews.llvm.org/D138291 concluded that it's more natural for `dimensions` to represent added dims. Also this way is more consistent with `linalg.reduce`.

Differential Revision: https://reviews.llvm.org/D138408

We generate erroneous trace for a basic block if it does not have at least one
predecessor when MinInstr strategy is used. Currently only this strategy is
implemented, so we always have a wrong trace for any entry block. This results in
wrong instructions heights calculation and also leads to wrong critical path.

The described behavior is demonstrated on a simple test. It shows that early
if-conv pass makes wrong decisions due to incorrectly calculated critical path
lenght.

Differential Revision: https://reviews.llvm.org/D138272

The transform doesn't work if argument isn't immediately a Phi.

Differential Revision: https://reviews.llvm.org/D138198

We may try a custom allocator in the future.

Convert fir.select_type operation to an if-then-else ladder.
The type guards are sorted before the conversion so it follows the
execution of SELECT TYPE construct as mentioned in 11.1.11.2 point 4
of the Fortran standard.

Depends on D138279

Reviewed By: jeanPerier

Differential Revision: https://reviews.llvm.org/D138280

The `li.[wd]` pseudo instructions are used to load an immediate value
into a GPR. These expand directly during asm parsing. As the result,
only real MC instructions are emitted to the MCStreamer. The actual
expansion to real instructions is similar to the expansion performed by
the GAS.

Note: The `li.w` always treats the imm operand as a 32-bit signed value.

Reviewed By: SixWeining

Differential Revision: https://reviews.llvm.org/D138086

Reviewed By: david-arm

Differential Revision: https://reviews.llvm.org/D137940

Since std::optional does not offer getPointer(), this patch replaces
X.getPointer()->foo with X->foo to make the migration from
llvm::Optional to std::optional easier.

This is part of an effort to migrate from llvm::Optional to
std::optional:

https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716

Make sure that the number of repetitions is correctly incorporated when
calculating the number of floating point operations.

Reviewed By: bondhugula

Differential Revision: https://reviews.llvm.org/D138382

Create the directory and file structures to support transform ops for
the affine dialect in the future.  Enable affine.unroll and affine.get_parent_for
transform operations in this first batch of check in.

Reviewed By: ftynse

Differential Revision: https://reviews.llvm.org/D137997

This patch makes `IAS` compatible with `GAS`. It accepts `la*` pseudo
instructions, and expands `la{,.local,.global}` into different
instructions according to different features.

```
 Default:
     la = la.global = la.got
     la.local = la.pcrel
 With feature "+la-global-with-pcrel":
     la = la.global = la.pcrel
 With feature "+la-global-with-abs":
     la = la.global = la.abs
 With feature "+la-local-with-abs":
     la.local = la.abs
 With features "+la-global-with-pcrel,+la-global-with-abs"(disorder):
     la = la.global = la.pcrel
```
Note: To keep consistent with `GAS` behavior, the "la" can only have
      one register operand.

Reviewed By: SixWeining

Differential Revision: https://reviews.llvm.org/D138021

This is part of an effort to migrate from llvm::Optional to
std::optional:

https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716

Continuation of https://reviews.llvm.org/D132146 (direct assembly path support, needs to merge first). Adds support to the integrated assembler path for emitting XCOFF exception sections. Both features need https://reviews.llvm.org/D133030 to merge first

Reviewed By: shchenz, DiggerLin

Differential Revision: https://reviews.llvm.org/D134195

This reverts commit 196edb9f.

This reverts commit eb3f7880.

[ELF] Add InputSectionBase::{addRelocs,relocs} and GotSection::addConstant to add/access relocations

to prepare for changing `relocations` from a SmallVector to a pointer.

Also change the `isec` parameter in `addAddendOnlyRelocIfNonPreemptible` to `GotSection &`.

The [Improving Clang's Diagnostics RFC][1] identifies eight broad fields
for Clang to surface, two of which are text-based. Since the current
diagnostics more closely map to the diagnostic summary (or headline), we
should rename them to ensure that there's no confusion when
Diagnostic.Reason is introduced in the near future.

[1]: https://discourse.llvm.org/t/rfc-improving-clang-s-diagnostics/62584

Reviewed By: aaron.ballman, erichkeane

Differential Revision: https://reviews.llvm.org/D135820

When there is not GRS or MOVIH/ORI instruction, we can not get the address of
ConstantPool entry directly. So we need put the address into ConstantPool to leverage CSKY::LRW instruction.