[clang] [CIR] Add sync scope to atomic fetch-and-update operation (PR #180770)

[via cfe-commits]

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Linux-->
# :penguin: Linux x64 Test Results

* 87148 tests passed
* 754 tests skipped
* 2 tests failed

## Failed Tests
(click on a test name to see its output)

### Clang
<details>
<summary>Clang.CIR/IR/invalid-atomic.cir</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/cir-opt /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/IR/invalid-atomic.cir -verify-diagnostics -split-input-file
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/cir-opt /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/IR/invalid-atomic.cir -verify-diagnostics -split-input-file
# .---command stderr------------
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/IR/invalid-atomic.cir:5:37: error: unexpected error: custom op 'cir.atomic.fetch' expected 'syncscope'
# |   %0 = cir.atomic.fetch and seq_cst %arg0, %arg1 : (!cir.ptr<!cir.float>, !cir.float) -> !cir.float
# |                                     ^
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/IR/invalid-atomic.cir:4:6: error: expected error "only atomic add, sub, max, and min operation could operate on floating-point values" was not produced
# |   // expected-error @below {{only atomic add, sub, max, and min operation could operate on floating-point values}}
# |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# `-----------------------------
# error: command failed with exit status: 1

--

```
</details>
<details>
<summary>Clang.CIR/IR/invalid-atomic.cir</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/cir-opt /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/IR/invalid-atomic.cir -verify-diagnostics -split-input-file
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/cir-opt /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/IR/invalid-atomic.cir -verify-diagnostics -split-input-file
# .---command stderr------------
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/IR/invalid-atomic.cir:5:37: error: unexpected error: custom op 'cir.atomic.fetch' expected 'syncscope'
# |   %0 = cir.atomic.fetch and seq_cst %arg0, %arg1 : (!cir.ptr<!cir.float>, !cir.float) -> !cir.float
# |                                     ^
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/CIR/IR/invalid-atomic.cir:4:6: error: expected error "only atomic add, sub, max, and min operation could operate on floating-point values" was not produced
# |   // expected-error @below {{only atomic add, sub, max, and min operation could operate on floating-point values}}
# |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# `-----------------------------
# error: command failed with exit status: 1

--

```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/180770