[llvm] [ReachingDefAnalysis] Extend the analysis to stack objects. (PR #118097)

[Mikhail Gudim via llvm-commits]

mgudim wrote:

> It looks this adds some compile-time overhead: https://llvm-compile-time-tracker.com/compare.php?from=beba4b08f72152abbb7d26df024f0d9338a7038b&to=990540f754e1ac21799515b724662ab0a7d3c7a1&stat=instructions:u
> 
> But more importantly, this causes catastrophic memory usage regressions: https://llvm-compile-time-tracker.com/compare.php?from=beba4b08f72152abbb7d26df024f0d9338a7038b&to=990540f754e1ac21799515b724662ab0a7d3c7a1&stat=max-rss Note that max-rss for the clang build increases by 60%.

I'll look into it. Hopefully it's what @topperc noticed here: https://github.com/llvm/llvm-project/pull/118097#discussion_r1904578312

https://github.com/llvm/llvm-project/pull/118097