llvm-project

a83ec0fb - [Utils] Improve documentation for `cloneLoopWithPreheader()` (#208817)

[Utils] Improve documentation for `cloneLoopWithPreheader()` (#208817) Fixed #191471. The client needs to further update the CFG and DominatorTree after calling `cloneLoopWithPreheader()` to ensure the IR remains valid, the function itself does not automatically update the control flow fully. Clarified and improved the comments for the function.