[compiler-rt] [llvm] [Memprof] Adds instrumentation support for memprof with histograms. (PR #100834)

[Teresa Johnson via llvm-commits]

https://github.com/teresajohnson commented:

Needs a test. E.g. see the instrumentation IR checking in llvm/test/Instrumentation/HeapProfiler/basic.ll.

https://github.com/llvm/llvm-project/pull/100834