MSVC/Windows does not support `alloca()`; instead it defines `_alloca()`
in `malloc.h`.

The option --function-arg-placeholders=0 results in placeholders being
omitted for class template argument lists. This patch extends the same
treatment to variable template argument lists.

Fixes https://github.com/clangd/clangd/issues/1976

The current implementation is not functional and does not compile. The
patch allows to correctly mark a dialect as denied for the purpose of
bufferization.

MIPSr6 ISA requires normal load/store instructions support
misunaligned memory access, while it is not always do so
by hardware. On some microarchitectures or some corner cases
it may need support by OS.

Don't confuse with pre-R6's lwl/lwr famlily: MIPSr6 doesn't
support them, instead, r6 requires lw instruction support
misunaligned memory access. So, if -mstrict-align is used for
pre-R6, lwl/lwr won't be disabled.

If -mstrict-align is used for r6 and the access is not well
aligned, some lb/lh instructions will be used to replace lw.
This is useful for OS kernels.

To be back-compatible with GCC, -m(no-)unaligned-access are also
added as Neg-Alias of -m(no-)strict-align.

This reverts commit d80d5b92.

It wasn't a particularly important transform to begin with and caused
some codegen regressions on targets that prefer `sitofp` so dropping.

Might re-visit along with adding `nneg` flag to `uitofp` so its easily
reversable for the backend.

Fixes this bug for the previous recursive DI type PR:
https://github.com/llvm/llvm-project/pull/80251#issuecomment-2007254788

.

Drawing inspiration from how clang uses DIBuilder to build forward
decls, this PR changes how placeholders are created & updated. Instead
of requiring each recursive DIType to do in-place mutation, we simply
ask for a temporary node as the placeholder, and run RAUW at the end
when the concrete node is translated.

This has the side effect of simplifying what's needed to add recursion
support for a type. Now only one additional method needs to be created
for exporting. Concretely, for this PR, `translateImpl` for
DICompositeType is back to the state it was before the previous PR, and
the only net addition for DICompositeType is `translateTemporaryImpl`.

---------

Co-authored-by: Tobias Gysi <tobias.gysi@nextsilicon.com>

When i1 true is used as an index, SExt extends it to i32 -1. This would
cause BitVector to overflow.
The language manual have specified that the index shall be treated as an
unsigned number, this patch fixes that.
(https://llvm.org/docs/LangRef.html#insertelement-instruction

)

This patch fixes #85717

---------

Signed-off-by: Peter Rong <PeterRong96@gmail.com>

In `-fbounds-safety`, bounds annotations are considered type attributes
rather than declaration attributes. Constructing them as type attributes
allows us to extend the attribute to apply nested pointers, which is
essential to annotate functions that involve out parameters: `void
foo(int *__counted_by(*out_count) *out_buf, int *out_count)`.

We introduce a new sugar type to support bounds annotated types,
`CountAttributedType`. In order to maintain extra data (the bounds
expression and the dependent declaration information) that is not
trackable in `AttributedType` we create a new type dedicate to this
functionality.

This patch also extends the parsing logic to parse the `counted_by`
argument as an expression, which will allow us to extend the model to
support arguments beyond an identifier, e.g., `__counted_by(n + m)` in
the future as specified by `-fbounds-safety`.

This also adjusts `__bdos` and array-bounds sanitizer code that already
uses `CountedByAttr` to check `CountAttributedType` instead to get the
field referred to by the attribute.

This reverts commit b92d6dd7. See
github.com/llvm/llvm-project/commit/b92d6dd7#commitcomment-139992444

We should use a tool like Visual Studio to clean up the headers.

Specification is here
https://github.com/riscv/riscv-isa-manual/blob/main/src/rnmi.adoc

CSRs numbers defined here
https://github.com/riscv/riscv-isa-manual/blob/main/src/priv-csrs.adoc

Outline and correct Doxygen comments in LineEntry.

since it will cause duplicate symbols when the partially linked object
is linked again.

This reverts commit 113214e1 as the
corresponding change was reverted in a289f66e.

llvm-project/lld/MachO/ObjC.cpp:617:12:
error: implicit conversion turns string literal into bool: 'const char[55]' to 'bool' [-Werror,-Wstring-conversion]
  617 |     assert("Tried to read pointer list beyond protocol section end");
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

* This completes support for verifying every declaration found in a
header is discovered in the dylib. Diagnostics are reported for each
class for differences that are representable in TBD files.

* This patch also now captures unavailable attributes that depend on
target triples. This is needed for proper tbd file generation.

This change removes an extra, unneeded debug directive emitted in the
PTX at the beginning on non-empty functions:
```nvptx
.visible .func  (.param .b32 func_retval0) foo(
        .param .b32 foo_param_0,
        .param .b32 foo_param_1
)
{
        .reg .b32    %r<4>;
        .loc    1 26 0             <---- unneeded (removed by the PR)
$L__func_begin0:
        .loc    1 26 0
```

Ensure that every InputFile has a non-null file so that we enforce this
in the future.

This reverts c3a1eb62 (and the related commit f3c5278e) which makes
cleanupAroundReplacements() no longer thread-safe.

Reverts llvm/llvm-project#85468 because @slackito reports this broke
stepping in one of their tests [1] and this patch was meant to be NFC.

[1]
https://github.com/llvm/llvm-project/commit/d5a277d309e92b1d3e493da6036cffdf815105b1#commitcomment-139991120

This patch exposes the missing `eBroadcastBitSymbolsChanged` event bit
in `SBTarget`.

Signed-off-by: Med Ismail Bennani <ismail@bennani.ma>

Fix https://github.com/llvm/llvm-project/issues/85343


When build lambda expression in lambda instantiation, `ThisType` is
required in `Sema::CheckCXXThisCapture` to build `this` capture. Set
`this` type by import `Sema::CXXThisScopeRAII` and it will be used later
in lambda expression transformation.

Co-authored-by: huqizhi <836744285@qq.com>

This fixes the following failure when doing a clean build (in particular
no .ninja* lying around) of lib/libMLIRMemRefToLLVM.a only:
```
In file included from mlir/lib/Conversion/MemRefToLLVM/MemRefToLLVM.cpp:18:
mlir/include/mlir/Dialect/Func/IR/FuncOps.h:29:10: fatal error: mlir/Dialect/Func/IR/FuncOps.h.inc: No such file or directory
```

Reverts llvm/llvm-project#84990 because this causes a full rebuild after
the commit hash changes.

This avoids many invokeELFT in `link`.

Add IRTranslator for scalable vector load instruction and include
corresponding tests with alignment argument included, which can be
smaller/equal/larger than element size or smaller/equal/larger than the
minimum total vector size.

Followup from
https://discourse.llvm.org/t/extending-an-invitation-to-compiler-newbies-compilers-coffee/77776

By design, when the nested profile is pre-inliner based, we should fully
honor pre-inliner decision, fix it by setting threshold to zero. We
observed a perf win on one internal service, no negative impact for
other big services.

A kernel implicit parameter (dyn_ptr) was introduced some time back.
This patch increments the kernel args version for a compiler supporting
dyn_ptr. The version will be used by the runtime to determine whether
the implicit parameter is generated by the compiler. The versioning is
required to support use cases where code generated by an older compiler
is linked with a newer runtime.

If approved, this patch should be backported to release 18.

Also be consistent about naming SP / FP.

This is to prepare for stack history buffer for memtag-stack

Many decodeULEB128/decodeSLEB128 users need to increment the pointer.
Add helpers to simplify this common pattern. We don't add `end` and
`error` parameters at present because many users don't need them.

Pull Request: https://github.com/llvm/llvm-project/pull/85739

If we only need the signbit `uitofp` simplified to 0, and `sitofp`
simplifies to `bitcast`.

Closes #85138

This cleans up basically all the regressions assosiated from #84688

Proof of all new cases: https://alive2.llvm.org/ce/z/5yYWLb

Closes #85445

In a previous patch an "internal_includes" target was created to give
access to the macro headers. This patch removes that in favor of
individual targets for these headers, better matching the existing code.