[all-commits] [llvm/llvm-project] 3b7628: [ci] Fix the base branch we use to determine chang...

[Louis Dionne via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3b762891826192ded07286852d326f9c9060f52e
      https://github.com/llvm/llvm-project/commit/3b762891826192ded07286852d326f9c9060f52e
  Author: Louis Dionne <ldionne.2 at gmail.com>
  Date:   2024-01-25 (Thu, 25 Jan 2024)

  Changed paths:
    M .ci/generate-buildkite-pipeline-premerge

  Log Message:
  -----------
  [ci] Fix the base branch we use to determine changes (#79503)

We should diff against the base branch, not always against `main`. This
allows the BuildKite pre-commit CI to work properly when we target other
branches, such as `release/18.x`.