[llvm] [SDAG] Set InBounds when when computing offsets into memory objects (PR #165425)

[Fabian Ritter via llvm-commits]

ritter-x2a wrote:

### Merge activity

* **Oct 31, 10:26 AM UTC**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/165425).


https://github.com/llvm/llvm-project/pull/165425