The change is based on the proposal from the following discussion:
https://llvm.discourse.group/t/rfc-memreftype-affine-maps-list-vs-single-item/3968

* Introduce `MemRefLayoutAttr` interface to get `AffineMap` from an `Attribute`
  (`AffineMapAttr` implements this interface).
* Store layout as a single generic `MemRefLayoutAttr`.

This change removes the affine map composition feature and related API.
Actually, while the `MemRefType` itself supported it, almost none of the upstream
can work with more than 1 affine map in `MemRefType`.

The introduced `MemRefLayoutAttr` allows to re-implement this feature
in a more stable way - via separate attribute class.

Also the interface allows to use different layout representations rather than affine maps.
For example, the described "stride + offset" form, which is currently supported in ASM parser only,
can now be expressed as separate attribute.

Reviewed By: ftynse, bondhugula

Differential Revision: https://reviews.llvm.org/D111553

This field gets assigned when the relevant object starts being used; but it
remains uninitialized beforehand. This risks introducing hard-to-detect
bugs if something changes, so zero-initialize the field.

Fix a dangling else that gcc-11 warned about. The EXPECT_EQ macro
expands to an if-else, so the whole construction contains a hidden
dangling else.

Differential Revision: https://reviews.llvm.org/D112044

gdbserver does not expose combined ymm* registers but rather XSAVE-style
split xmm* and ymm*h portions.  Extend value_regs to support combining
multiple registers and use it to create user-friendly ymm* registers
that are combined from split xmm* and ymm*h portions.

Differential Revision: https://reviews.llvm.org/D108937

While build llvm-project as a sub-project on windows, met a build error: 
libllvm-c.exports /llvm/bin\llvm-nm.exe: error: ...builds/rel64ninja/./lib/LLVMDemangle.lib: no such file or directory
The libllvm-c.exports, libllvm-c.args, and lib/*.lib should under LLVM_BINARY_DIR, using CMAKE_BINARY_DIR will cause 'no such file' error while llvm-project built as a sub-project.

This mode never works (mismatching crtbeginT.o and crtendS.o) and probably
unsupported by GCC on glibc based Linux distro (incorrect crtbeginT.o causes
linker error) but makes sense (-shared means building a shared object, -static
means avoid shared object dependencies) and can be used on musl based Linux
distro.

mingw supports this mode as well.

This is a frist draft of a set of policies around new git repos and how we grant write access to our GitHub organisation.

This proposal is based on the discussions in:
https://github.com/llvm/llvm-iwg/issues/40
https://github.com/llvm/llvm-iwg/issues/51

Differential Revision: https://reviews.llvm.org/D111723

Subset of D111993. Fix typos, rename read to load.

Reviewed By: tianshilei1992

Differential Revision: https://reviews.llvm.org/D111999

Fix a potential nullptr dereference in AppleObjCRuntimeV2 by checking
the result of GetClassInfoUtilityFunction and returning a failure if
it's null.

The DynamicClassInfoExtractor was already doign the right thing, but the
SharedCacheClassInfoExtractor was missing this check.

By default, such a non-template variable of non-volatile const-qualified type
having namespace-scope has internal linkage ([basic.link]), so no need for `static`.

This lifts the global offset table and procedure linkage table builders out of
ELF_x86_64.h and into x86_64.h, renaming them with generic names
x86_64::GOTTableBuilder and x86_64::PLTTableBuilder. MachO_x86_64.cpp is updated
to use these classes instead of the older PerGraphGOTAndStubsBuilder tool.

It was being used to control the nothrow attribute on the builtins. The
nothrow attribute is for C++ exceptions. Even if the vector builtins
have side effects in IR, that's different than the nothrow attribute.

Reviewed By: HsiangKai

Differential Revision: https://reviews.llvm.org/D112028

Similar to SVE, this separates the RVV builtlins into their own
region of builtin IDs. Only those IDs are allowed to be used by
the builtin_alias attribute now.

Reviewed By: HsiangKai

Differential Revision: https://reviews.llvm.org/D111923

I think the C++ code example had the wrong name for the block copy function.

Reviewed By: rjmccall

Differential Revision: https://reviews.llvm.org/D91815

This avoids defining DEBUG_TYPE in a public header.

We would like to move ThinLTO’s battle-tested file caching mechanism to
the LLVM Support library so that we can use it elsewhere in LLVM.

Patch By: noajshu

Differential Revision: https://reviews.llvm.org/D111371

GPR uses argument registers as the first group of registers to allocate.
This patch uses vector argument registers, v8 to v23, as the first group
to allocate.

Differential Revision: https://reviews.llvm.org/D111304

- `assign` with ArrayRef was calling `append`
- `assign` with empty ArrayRef was not clearing storage

Reviewed By: jpienaar

Differential Revision: https://reviews.llvm.org/D112043

Moves visitEdge into the TableManager derivatives, replacing the fixEdgeKind
methods in those classes. The visitEdge method takes on responsibility for
updating the edge target, as well as its kind.

This helper function checks if two given ops are in mutually exclusive branches of the same scf::IfOp.

Differential Revision: https://reviews.llvm.org/D111957

Differential Revision: https://reviews.llvm.org/D111959

I need to set a fake default platform for the UnitTest test to run on other
systems.

Right now when we see -O# we add the corresponding 'default<O#>' into
the list of passes to run when translating legacy -pass-name. This has
the side effect of not using the default AA pipeline.

Instead, treat -O# as -passes='default<O#>', but don't allow any other
-passes or -pass-name. I think we can keep `opt -O#` as shorthand for
`opt -passes='default<O#>` but disallow anything more than just -O#.

Tests need to be updated to not use `opt -O# -pass-name`.

Reviewed By: asbirlea

Differential Revision: https://reviews.llvm.org/D112036

Now that the legacy PM is deprecated for the optimization pipeline, we
can start deleting legacy PM tests.

For tests that test both PMs, merge the RUN lines.
Delete tests specific to the legacy PM.

Reviewed By: rsuderman

Differential Revision: https://reviews.llvm.org/D112037

Add the string to floating point conversion functions.
Long doubles aren't supported yet, but floats and doubles are. The
primary algorithm used is the Eisel-Lemire ParseNumberF64 algorithm,
with the Simple Decimal Conversion algorithm as backup.

Links for more information on the algorithms:

Number Parsing at a Gigabyte per Second, Software: Practice and
Experience 51 (8), 2021 (https://arxiv.org/abs/2101.11408)
https://nigeltao.github.io/blog/2020/eisel-lemire.html
https://nigeltao.github.io/blog/2020/parse-number-f64-simple.html

Differential Revision: https://reviews.llvm.org/D109261

This value is only used by the RVVIntrinsic constructor. We don't
need it to be a member.

By default clang emits complete contructors as alias of base constructors if they are the same.
The backend is supposed to emit symbols for the alias, otherwise it causes undefined symbols.
@yaxunl observed that this issue is related to the llvm options `-amdgpu-early-inline-all=true`
and `-amdgpu-function-calls=false`. This issue is resolved by only inlining global values
with internal linkage. The `getCalleeFunction()` in AMDGPUResourceUsageAnalysis also had
to be extended to support aliases to functions. inline-calls.ll was corrected appropriately.

Reviewed By: yaxunl, #amdgpu

Differential Revision: https://reviews.llvm.org/D109707

The point is to allow users with a related set of script based commands
to organize their commands in a hierarchy in the command set, rather than
having to have only top-level commands.

Differential Revision: https://reviews.llvm.org/D110298

On Windows there's an *.exe suffix to opt that isn't present in Linux.
Remove the check for opt in the string

Reviewed By: aartbik

Differential Revision: https://reviews.llvm.org/D112029

There's a lot of duplicated calls to find various compiler-rt libraries
from build of runtime libraries like libunwind, libc++, libc++abi and
compiler-rt. The compiler-rt helper module already implemented caching
for results avoid repeated Clang invocations.

This change moves the compiler-rt implementation into a shared location
and reuses it from other runtimes to reduce duplication and speed up
the build.

Differential Revision: https://reviews.llvm.org/D88458

https://github.com/dessant/repo-lockdown/issues/6

Windows which outputs "is a directory" rather than "Is a directory" on error compared to linux

If we're using an ashr to sign-extend the entire upper 16 bits of the i32 element, then we can replace with a lshr. The sign bit will be correctly shifted for PMADDWD's implicit sign-extension and the upper 16 bits are zero so the upper i16 sext-multiply is guaranteed to be zero.

The lshr also has a better chance of folding with shuffles etc.

These look like they have intentional side effects that would break from
shortcircuiting.