This starts using `reportUniqueWarnings` instead of `reportError`
in the code that is responsible for dumping notes.

Differential revision: https://reviews.llvm.org/D92021

Implements P1645: constexpr for <numeric> algorithms

Reviewed By: ldionne, #libc

Differential Revision: https://reviews.llvm.org/D90569

Add support for the Neoverse N2 CPU to the ARM and AArch64 backends.

Differential Revision: https://reviews.llvm.org/D91695

castAs<> will assert the correct cast type instead of just returning null, which we then try to dereference immediately.

castAs<> will assert the correct cast type instead of just returning null, which we then try to dereference immediately.

castAs<> will assert the correct cast type instead of just returning null, which we then try to dereference immediately in the setUsedBits call.

castAs<> will assert the correct cast type instead of just returning null, which we then try to dereference immediately.

This patch adds a target-specific DAG combine for mscatter to promote indices
with element types i8 or i16 before legalisation, plus various tests with illegal types.

Reviewed By: sdesmalen

Differential Revision: https://reviews.llvm.org/D90945

The plan is to use this to use this for .clang-format, .clang-tidy, and
compile_commands.json. (Currently the former two are reparsed every
time, and the latter is cached forever and changes are never seen).

Differential Revision: https://reviews.llvm.org/D88172

This is a follow-up to 00a66011 to make
isa<VPReductionRecipe> work and unifies the VPValue ID names, by making
sure they all consistently start with VPV*.

Tracer must be set up before calling any clangd-specific functions.

Keep all kernel parameter type diagnostic tests in
invalid-kernel-parameters.cl .

Differential Revision: https://reviews.llvm.org/D92033

The macro is emitted when wargeting SVE code generation with the additional command line option `-msve-vector-bits=<N>`.

The behavior implied by the macro is described in sections "3.7.3.3. Behavior specific to SVE vectors" of the SVE ACLE (Version 00bet6) that can be found at https://developer.arm.com/documentation/100987/latest

Reviewed By: rengolin, rsandifo-arm

Differential Revision: https://reviews.llvm.org/D90956

`notes_begin()` is used for iterating over notes. This API in some cases might print
section type and index. At the same time during iterating, the `Elf_Note_Iterator`
might omit it as it doesn't have this info.

Because of above we might have the redundant duplication of information in warnings:
(See D92021).

```
warning: '[[FILE]]': unable to read notes from the SHT_NOTE section with index 1: SHT_NOTE section [index 1] has invalid offset (0x40) or size (0xffff0000)
```

This change stops reporting section index/type in Object/ELF.h/notes_begin().
(FTR, this was introduced by me for llvm-readobj in D64470).
Instead we can describe sections/program headers on the caller side.

Differential revision: https://reviews.llvm.org/D92081

Differential Revision: https://reviews.llvm.org/D92082

Currently we never dump the `sh_offset` key.
Though it sometimes an important information.

To reduce the noise this patch implements the following logic:
1) The "Offset" key for the first section is always emitted.
2) If we can derive the offset for a next section naturally,
   then the "Offset" key is omitted.

By "naturally" I mean that section[X] offset is expected to be:
```
offsetOf(section[X]) == alignTo(section[X - 1].sh_offset + section[X - 1].sh_size, section[X].sh_addralign)
```

So, when it has the expected value, we omit it from the output.

Differential revision: https://reviews.llvm.org/D91152

It is possible that some write resource is variant in model A
and sequence in model B. Such case will trigger assertion in
getAllPredicates function.

Fixes https://github.com/clangd/clangd/issues/597

Differential Revision: https://reviews.llvm.org/D92077

AVR and PPC64 bots reports link errors:
(http://lab.llvm.org:8011/#/builders/112/builds/1522)
(http://lab.llvm.org:8011/#/builders/52/builds/1764)

/tmp/cclOvLx0.s: Assembler messages:
/tmp/cclOvLx0.s:9223: Error: symbol `_ZN4llvm12function_refIFvvEE11callback_fnIUlvE2_EEvl' is already defined
/tmp/cclOvLx0.s:9227: Error: symbol `.L._ZN4llvm12function_refIFvvEE11callback_fnIUlvE2_EEvl' is already defined
/tmp/cclOvLx0.s:10272: Error: symbol `_ZN4llvm12function_refIFvvEE11callback_fnIUlvE2_EEvl' is already defined
/tmp/cclOvLx0.s:10276: Error: symbol `.L._ZN4llvm12function_refIFvvEE11callback_fnIUlvE2_EEvl' is already defined
/tmp/cclOvLx0.s:10285: Error: symbol `_ZN4llvm12function_refIFvvEE11callback_fnIUlvE2_EEvl' is already defined
/tmp/cclOvLx0.s:10289: Error: symbol `.L._ZN4llvm12function_refIFvvEE11callback_fnIUlvE2_EEvl' is already defined

/tmp/ccFJYr6I.s: Assembler messages:
/tmp/ccFJYr6I.s:6284: Error: symbol `_ZN4llvm12function_refIFvvEE11callback_fnIUlvE2_EEvl' is already defined
/tmp/ccFJYr6I.s:7053: Error: symbol `_ZN4llvm12function_refIFvvEE11callback_fnIUlvE2_EEvl' is already defined
/tmp/ccFJYr6I.s:7093: Error: symbol `_ZN4llvm12function_refIFvvEE11callback_fnIUlvE2_EEvl' is already defined

I *guess* the reason might be the default lambda argument. I've removed it.

Similar to other patches, this makes VPWidenRecipe a VPValue. Because of
the way it interacts with the reduction code it also slightly alters the
way that VPValues are registered, removing the up front NeedDef and
using getOrAddVPValue to create them on-demand if needed instead.

Differential Revision: https://reviews.llvm.org/D88447

This converts the VPReductionRecipe into a VPValue, like other
VPRecipe's in preparation for traversing def-use chains. It also makes
it a VPUser, now storing the used VPValues as operands.

It doesn't yet change how the VPReductionRecipes are created. It will
need to call replaceAllUsesWith from the original recipe they replace,
but that is not done yet as VPWidenRecipe need to be created first.

Differential Revision: https://reviews.llvm.org/D88382

We have a similar logic for LLVM/GNU styles that can be deduplicated.
This will allow to replace `reportError` calls with `reportUniqueWarning`
calls in a single place.

Differential revision: https://reviews.llvm.org/D92018

During reviewing https://reviews.llvm.org/D84419, @efriedma mentioned the gap between realigned stack pointer and origin stack pointer should be probed too whatever the alignment is. This patch fixes the issue for PPC64.

Reviewed By: jsji

Differential Revision: https://reviews.llvm.org/D88078

This reverts commit 7dcc8899.

This patch introduced a logical error that breaks whole logic of this analysis.
All checks we are making are supposed to be loop-independent, so that we could
safely remove the range check. The 'nw' fact is loop-dependent, so we can remove
the check basing on facts from this very check.

Motivating examples will follow-up.

PowerPC has instruction ftsqrt/xstsqrtdp etc to do the input test for software square root.
LLVM now tests it with smallest normalized value using abs + setcc. We should add hook to
target that has test instructions.

Reviewed By: Spatel, Chen Zheng, Qiu Chao Fang

Differential Revision: https://reviews.llvm.org/D80706

This matches the legacy PM's EP_ModuleOptimizerEarly. Some backends use
this extension point and adding the pass somewhere else like
PipelineStartEPCallback doesn't work.

Reviewed By: ychen

Differential Revision: https://reviews.llvm.org/D91804

When deciding to widen narrow use, we may need to prove some facts
about it. For proof, the context is used. Currently we take the instruction
being widened as the context.

However, we may be more precise here if we take as context the point that
dominates all users of instruction being widened.

Differential Revision: https://reviews.llvm.org/D90456
Reviewed By: skatkov

`SimplifySetCC` invokes `getNodeIfExists` without passing `Flags` argument and `getNodeIfExists` uses a default `SDNodeFlags` to intersect the original flags, as a consequence, flags like `nsw` is dropped. Added a new helper function `doesNodeExist` to check if a node exists without modifying its flags.

Reviewed By: #powerpc, nemanjai

Differential Revision: https://reviews.llvm.org/D89938

This patch is the initial patch for support of the AIX extended vector ABI.  The extended ABI treats vector registers V20-V31 as non-volatile and we add them as callee saved registers in this patch.

Reviewed By: sfertile

Differential Revision: https://reviews.llvm.org/D88676

Tests that pass -mlinker-version=old version and that then don't
expect new flags to be passed need to explicitly request the system
linker now.

Also ensure the -cc1 argument is actually part of the clang -cc1 command
line rather than some unrelated command line.