search for: safepointplacementpass

...uffices for correctness, but is not ideal from a performance perspective. (To put it mildly.) * For those curious, you can find the current implement by searching for "isLiveAtSafepoint" in https://github.com/AzulSystems/llvm-late-safepoint-placement/blob/master/lib/Transforms/Scalar/SafepointPlacementPass.cpp. It's a trivial reachability algorithm with special cases for inbound values into a phi and uses that are encountered along paths which contain the original definition. We rerun the search once per potentially live value. As you might imagine, that's a bit expensive. :) Philip