[llvm-branch-commits] [llvm] DAG: Avoid stack usage in bitcast operand promotion to legal vector (PR #125637)

[Matt Arsenault via llvm-branch-commits]

arsenm wrote:

### Merge activity

* **Feb 4, 4:28 AM EST**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/125637).


https://github.com/llvm/llvm-project/pull/125637