[llvm] [SROA] Optimize reloaded values in allocas that escape into readonly nocapture calls. (PR #116645)

[David Green via llvm-commits]

davemgreen wrote:

> It looks like this miscompiles stage2 clang in a way that causes the subsequent test-suite build to fail: https://llvm-compile-time-tracker.com/show_error.php?commit=5720d0797414c8413dc797e3db8b1fd8ed324977

Thanks I'll take a look. It looks like I had misunderstood how partitions work with unsplittable slices and how they can overlap.

https://github.com/llvm/llvm-project/pull/116645