[libc-commits] [libc] [libc] Add helper function for aligning pointers and values (PR #183324)

[via libc-commits]

github-actions[bot] wrote:

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

The build failed before running any tests. Click on a failure below to see the details.

<details>
<summary>libc/test/src/__support/CMakeFiles/libc.test.src.__support.block_test.__unit__ /home/gha/actions-runner/_work/llvm-project/llvm-project/build/runtimes/runtimes-bins/libc/test/src/__support/CMakeFiles/libc.test.src.__support.block_test.__unit__</summary>

```
FAILED: libc/test/src/__support/CMakeFiles/libc.test.src.__support.block_test.__unit__ /home/gha/actions-runner/_work/llvm-project/llvm-project/build/runtimes/runtimes-bins/libc/test/src/__support/CMakeFiles/libc.test.src.__support.block_test.__unit__
cd /home/gha/actions-runner/_work/llvm-project/llvm-project/build/runtimes/runtimes-bins/libc/test/src/__support && /home/gha/actions-runner/_work/llvm-project/llvm-project/build/runtimes/runtimes-bins/libc/test/src/__support/libc.test.src.__support.block_test.__unit__.__build__
```
</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/183324