For a declaration the `FunctionDecl` begin location does not include the
template parameter lists, but for some reason if you have a separate
definitions to the declaration the begin location does include them.
With this patch we now correctly handle that case.

This fixes llvm#62746

Reviewed By: PiotrZSL

Differential Revision: https://reviews.llvm.org/D153218

As discussed in the https://reviews.llvm.org/D148697 review.

Reviewed By: PiotrZSL

Differential Revision: https://reviews.llvm.org/D153198

* Add `Address::withElementType()` as a replacement for
  `CGBuilderTy::CreateElementBitCast`.

* Partial progress towards replacing `CreateElementBitCast`, as it no
  longer does what its name suggests. Either replace its uses with
  `Address::withElementType()`, or remove them if no longer needed.

* Remove unused parameter 'Name' of `CreateElementBitCast`

Reviewed By: barannikov88, nikic

Differential Revision: https://reviews.llvm.org/D153196

Fixes https://github.com/llvm/llvm-project/issues/59663

Fixes https://github.com/llvm/llvm-project/issues/63363

For a function not in an IR COMDAT, currently we place it into a nodeduplicate IR
COMDAT so that its text section and its associated .pseudo_probe section will be
in the same section group, which can be retained or discarded by the linker as a
unit. However, the section group wastes space.

After D153189 uses SHF_LINK_ORDER to ensure a .pseudo_probe section will be
discarded when its associated text section is discarded, we can remove the
nodeduplicate IR change.

In the following example, the .pseudo_probe associated with .text.f is discarded as expected.
```
clang -c -ffunction-sections -fpseudo-probe-for-profiling -xc =(printf 'void _start(){} void f(){}') -o a.o
ld.lld --gc-sections --print-gc-sections a.o
```

Reviewed By: hoy

Differential Revision: https://reviews.llvm.org/D153191

OpenBSD commit for reference:
https://github.com/openbsd/src/commit/7b407c478fab53a6d9a091887c828c3f7b3f8b46

The test fails SCEV verification, which cause the expensive check bots
to fail. Always run verification and mark as XFAIL until fixed.

to simplify code near __tls_get_addr parsing.

Add support for the bare pointer calling convention in the gpu-to-llvm
pass. This wasn't being exposed and is needed when GPU-compiled MLIR is
to be called with this convention.

Reviewed By: krzysz00

Differential Revision: https://reviews.llvm.org/D152477

This reverts commit abfeda5a.
and fe19036e.

The added assertion triggers during clang bootstrap builds. Revert while
I investigate.

Differential Revision: https://reviews.llvm.org/D153203

Add test for LSR miscompile.

- This was to make implementing jthread easier and requested in https://reviews.llvm.org/D151559

Differential Revision: https://reviews.llvm.org/D151792

It was previously present in the inline code block and did not work as a
hyperlink.

Reviewed By: yassingh

Differential Revision: https://reviews.llvm.org/D153061

GenerateTruncates at the moment creates extends/truncates for post-inc
uses of normalized expressions. For example, if an add rec of the form
{1,+,-1} is used outside the loop, the normalized form will use {1,+,-1}
instead of {0,+,-1}. When naively sign-extending the normalized
expression, it will get extended incorrectly to {1,+,-1} for the wider
type, if the backedge-taken count of the loop is 1.

To address this, the patch updates GenerateTruncates to check if the
LSRUse contains any fixups with PostIncLoops. If that's the case, first
de-normalize the expression, then perform the extend/truncate, then
normalize again.

There may be other places where similar checks are needed and the helper
can be generalized for those cases. I'd not be surprised if other subtle
mis-compiles are caused by this.

Fixes #38847.
Fixes #58039.
Fixes #62852.

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D153004

* Add the SHF_LINK_ORDER flag so that the .pseudo_probe section is discarded when the associated text section is discarded.
* Add unique ID so that with `clang -ffunction-sections -fno-unique-section-names`, there is one separate .pseudo_probe for each text section (disambiguated by `.section ....,unique,id` in assembly)

The changes allow .pseudo_probe GC even if we don't place instrumented functions
in an IR comdat (see `getOrCreateFunctionComdat` in SampleProfileProbe.cpp).

Reviewed By: hoy

Differential Revision: https://reviews.llvm.org/D153189

Differential Revision: https://reviews.llvm.org/D153139

This commit breaks up CodeGen/TargetInfo.cpp into a set of *.cpp files,
one file per target. There are no functional changes, mostly just code moving.

Non-code-moving changes are:
* A virtual destructor has been added to DefaultABIInfo to pin the vtable to a cpp file.
* A few methods of ABIInfo and DefaultABIInfo were split into declaration + definition
  in order to reduce the number of transitive includes.
* Several functions that used to be static have been placed in clang::CodeGen
  namespace so that they can be accessed from other cpp files.

RFC: https://discourse.llvm.org/t/rfc-splitting-clangs-targetinfo-cpp/69883

Reviewed By: efriedma

Differential Revision: https://reviews.llvm.org/D148094

Wrap calls to XXXTargetCodeGenInfo constructors into factory functions.
This allows moving implementations of TargetCodeGenInfo to dedicated cpp
files without a change.

Reviewed By: efriedma

Differential Revision: https://reviews.llvm.org/D150215

Replace getAs with castAs and add assert if needed.
Differential Revision: https://reviews.llvm.org/D152977

`LoongArchISD::CSRWR` has two results. The first is the result of
`loongarch.csrwr.[wd]` intrinsic and the second is the chain. But
currently the chain is not processed correctly when creating this
node, resulting in the `csrwr` instruction being optimized out when
the result is not used by anyone [1]. `LoongArchISD::CSRXCHG` has
the same issue.

This patch addresses this issue.

[1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/loongarch/include/asm/loongarch.h?h=v6.4-rc6#n219

Reviewed By: hev

Differential Revision: https://reviews.llvm.org/D153120

Reviewed By: xry111

Differential Revision: https://reviews.llvm.org/D153119

The patch for promised interfaces (a5ef51d7) doesn't register all
extensions in the CAPI's `mlirRegisterAllDialects()` function.  This is
used by the MLIR Python bindings, causing downstream users of the Python
bindings to terminate abruptly.  This patch adds the call to register
all extensions.

Reviewed By: rriddle

Differential Revision: https://reviews.llvm.org/D153174

Improve D151719.
(xor (setcc constant, y, setlt), 1) -> (setcc y, constant + 1, setlt)
https://alive2.llvm.org/ce/z/BZNEia

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D152128

This makes the scope and ordering arguments actually do something.
Also add some new OpenCL tests since the existing HIP tests didn't
cover address spaces.

[MC] Restore a special case to support limited A-B folding when A/B are in the same fragment being laided out

Add subsection-if.s to test what we can fold (in the same fragment) and what we cannot.

Fix https://github.com/ClangBuiltLinux/linux/issues/1876
Fixes: 4bdc7f7a

If the first token of an annotated line already has a computed Newlines,
reuse it to avoid potential overlapping whitespace replacements before
preprocessor branching directives.

Fixes #62892.

Differential Revision: https://reviews.llvm.org/D151954