[Diffusion] rL247927: Restore "Function bitcode index in Value Symbol Table and lazy reading support"

[Tom Stellard via llvm-commits]

tstellarAMD added a subscriber: tstellarAMD.
tstellarAMD added auditors: llvm-commits, tejohnson.
tstellarAMD added a comment.

This commit caused a regression: https://llvm.org/bugs/show_bug.cgi?id=25101


Users:
  tejohnson (Author, Auditor)
  llvm-commits (Auditor)

http://reviews.llvm.org/rL247927