[llvm] [Support] Use bump ptr allocator for domtree nodes (PR #102516)

[Nikita Popov via llvm-commits]

nikic wrote:

Unfortunately, this is also a massive memory usage regression, see https://llvm-compile-time-tracker.com/compare.php?from=fbb0619fe2acea4ac8764d13b754505ed8f1b578&to=7d6bcb79154bac9d4df6559535cc8c310b1617c2&stat=max-rss&linkStats=on (the LTO "link only" stats are usually the best indicator for max-rss, and we see 3-3.5% regression in geomean there).

https://github.com/llvm/llvm-project/pull/102516