Data layout information allows to answer questions about the size and alignment
properties of a type. It enables, among others, the generation of various
linear memory addressing schemes for containers of abstract types and deeper
reasoning about vectors. This introduces the subsystem for modeling data
layouts in MLIR.

The data layout subsystem is designed to scale to MLIR's open type and
operation system. At the top level, it consists of attribute interfaces that
can be implemented by concrete data layout specifications; type interfaces that
should be implemented by types subject to data layout; operation interfaces
that must be implemented by operations that can serve as data layout scopes
(e.g., modules); and dialect interfaces for data layout properties unrelated to
specific types. Built-in types are handled specially to decrease the overall
query cost.

A concrete default implementation of these interfaces is provided in the new
Target dialect. Default...

Support specifying the II and disabling pipelining.

Reviewed By: ftynse

Differential Revision: https://reviews.llvm.org/D98420

This enables the look-through-copy to hack around not correctly
regbankselecting constants to match the use bank.

For attribute sets, the return index is at 0, and arguments start at
1. getParamAlignment adds the offset of 1, so we need to convert from
attribute index back to IR index.

[flang][OpenMP] Add semantic check for occurrence of multiple list items in aligned clause for simd directive

Reviewed By: kiranchandramohan, clementval

Differential Revision: https://reviews.llvm.org/D97964

D96202 removes the test dependency on debugserver which is causing a bunch of
tests to fail on a clean build.

This patch re-adds the dependency. I decided to not add the dependency in the
`test/API` folder as we actually need it in all kinds of tests (we have shell,
API and a few unit tests such as the LLDBServerTests that depend on the
debugserver binary). lldb-server is also handled in the same way.

Reviewed By: JDevlieghere, labath

Differential Revision: https://reviews.llvm.org/D98196

Summary:
The changes introduced in D87946 changed the API for libomptarget
functions. `__kmpc_push_target_tripcount` was a function in Clang 11.x
but was not given a backward-compatible interface. This change will
require people using Clang 13.x or 12.x to recompile their offloading
programs.

Reviewed By: jdoerfert cchen

Differential Revision: https://reviews.llvm.org/D98358

getAs<> returns null for missed casts, resulting in null dereferences - use castAs<> instead which will assert the cast is correct.

Revert "[DebugInfo] Use variadic debug values to salvage BinOps and GEP instrs with non-const operands"

This reverts commit c0f3dfb9.

Reverted due to an error on the clang-x64-windows-msvc buildbot.

Starting with Power 10 the instruction paddi is available to use.
The instruction allows for immediates that are 34 bits.

This patch adds exploitation of the paddi instruction to allow us
to materialize constants.

Reviewed By: lei, amyk

Differential Revision: https://reviews.llvm.org/D93300

This is the minimal port from ELF. Any extension should easy from here

Test plan: ninja check-all-macho

Reviewed By: #lld-macho, thakis

Differential Revision: https://reviews.llvm.org/D98419

Add documentation that explains how to extend clang with the new
extensions/features. The guidelines also detail clang's position
about the extension pragmas for the new functionality.

Differential Revision: https://reviews.llvm.org/D97072

4c973ae5 implemented reduction of vector swap for lane-insensitive
operations. This commit fixes it for checking number of uses of the
vector operation.

Adds fix-its when users forget to explicitly capture variables or this in lambdas

Addresses https://github.com/clangd/clangd/issues/697

Reviewed By: kbobyrev

Differential Revision: https://reviews.llvm.org/D96975

Explicitly pass loaded type when creating loads, in preparation
for the deprecation of these APIs.

There are still a couple of uses left.

Differential Revision: https://reviews.llvm.org/D98348

This patch improves salvageDebugInfoImpl by allowing it to salvage arithmetic
operations with two or more non-const operands; this includes the GetElementPtr
instruction, and most Binary Operator instructions. These salvages produce
DIArgList locations and are only valid for dbg.values, as currently variadic
DIExpressions must use DW_OP_stack_value. This functionality is also only added
for salvageDebugInfoForDbgValues; other functions that directly call
salvageDebugInfoImpl (such as in ISel or Coroutine frame building) can be
updated in a later patch.

Differential Revision: https://reviews.llvm.org/D91722

This patch introduced codegen faults.  An attempt to fix this was done
in https://reviews.llvm.org/D97193, but ultimately it was decided to
approach this differently.

This reverts commit 42635856.

Differential Revision: https://reviews.llvm.org/D98350

If we encounter a degenerate select node where both operands are
the same, then we can continue negating the condition while swapping
operands, resulting in an infinite loop. Avoid this by bailing out
if both operands are the same.

Fixes https://bugs.llvm.org/show_bug.cgi?id=49509.

Differential Revision: https://reviews.llvm.org/D98340

When building builtins, the toolchain might not yet be at a stage
when linking a test application works yet, as builtins aren't
available. Therefore set CMAKE_TRY_COMPILE_TARGET_TYPE to STATIC_LIBRARY,
to avoid failing the compiler sanity check.

Setting CMAKE_TRY_COMPILE_TARGET_TYPE to STATIC_LIBRARY has the risk
of making checks for library availability succeed falsely (e.g.
indicating that libs would be available that really aren't, as the
tests don't do any linking), but the builtins library doesn't try to
link against any external libraries (and only produces static libraries
anyway), so it should be safe here.

This avoids having to set CMAKE_C_COMPILER_WORKS when bootstrapping a
cross toolchain, when building the builtins.

Differential Revision: https://reviews.llvm.org/D91334

Revert rGcd938ab1 "[X86] canonicalizeShuffleWithBinOps - add X86ISD::PSHUFB handling."

Investigating an issue reported by @bkramer, possibly when the PSHUFB mask generates zero elements.

This enables unifying command line flags with config options in clangd
internals. This patch changes behaviour in 2 places:
- BackgroundIndex was previously disabled when -remote-index was
provided. After this patch, it will be enabled but all files will have
bkgindex policy set to Skip.
- -index-file was loaded at startup (at least load was initiated), now
the load will happen through ProjectAwareIndex with first index query.

Unfortunately this doesn't simplify any options initially, as
- CompileCommandsDir is also used by clangd --check workflow, which
doesn't use configs.
- EnableBackgroundIndex option controls whether the component will be
created at all, which implies creation of extra threads registering a
listener for compilation database discoveries.

Differential Revision: https://reviews.llvm.org/D98029

Explicit specifier can only be mentioned on the in-line declaration of a
constructor, so don't carry it over to the definition.

Differential Revision: https://reviews.llvm.org/D98164

Fixes PR49451

verifyCompatibleShapes is not transitive. Create an n-ary version and
update SameOperandShapes and SameOperandAndResultShapes traits to use
it.

Differential Revision: https://reviews.llvm.org/D98331

Also give CanonicalIncludes a less powerful interface (canonicalizes
symbols vs headers separately) so we can cache its results better.

Prior to this:
 - path->uri conversions were not consistently cached, this is
   particularly cheap when we start from a FileEntry* (which we often can)
 - only a small fraction of header-to-include calculation was cached

This is a significant speedup at least for dynamic indexing of preambles.
On my machine, opening XRefs.cpp:

```
PreambleCallback 1.208 -> 1.019 (-15.7%)
BuildPreamble    5.538 -> 5.214 (-5.8%)
```

Differential Revision: https://reviews.llvm.org/D98371

Recently gc.result has been marked with readnone instead of readonly and
this opens a door for different optimization to duplicate gc.result.
Statepoint lowering is not ready to see several gc.results.
The problem appears when there are gc.results with one located in the same
basic block and another located in other basic block.
In this case we need both export VR and fill local setValue.

Note that this case is not sufficient optimization done before CodeGen.
It is evident that local gc.result dominates all other gc.results and it is handled
by GVN and EarlyCSE.

But anyway, even if IR is not optimal Backend should not crash on a valid IR.

Reviewers: reames, dantrushin
Reviewed By: dantrushin
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D98393

Buffer hoisting moves allocs upwards although it has dependency within its
nested region. This patch fixes this issue.

https://bugs.llvm.org/show_bug.cgi?id=49142

Differential Revision: https://reviews.llvm.org/D98248

Fix MSVC "'type cast': conversion from 'unsigned int' to 'const llvm::CallBase *' of greater size" warning. NFCI.

As pointed out by Joel E. Denny in D97845, the OverflowErrorStr variable
is misnamed because the error is raised for any parsing error. Note that
in FileCheck proper this only happens in case of (under|over)flow
because the regex will ensure a number in the correct format is matched.

Reviewed By: jdenny

Differential Revision: https://reviews.llvm.org/D98342

It wasn't taking into account that QueryingAA was a pointer.

This moves code that sets the architecture name
and Float ABI into two new functions in
ToolChains/Arch/ARM.cpp. Greatly simplifying ComputeLLVMTriple.

Some light refactoring in setArchNameInTriple to
move local variables closer to their first use.

Reviewed By: ostannard

Differential Revision: https://reviews.llvm.org/D98253