[llvm] [GlobalMerge] Aggressively merge constants to reduce TOC entries (PR #111756)

[Eli Friedman via llvm-commits]

efriedma-quic wrote:

This seems like it will increase the number of loads from the TOC... and inserting more TOC loads so you can shrink the TOC doesn't seem like a good tradeoff.

https://github.com/llvm/llvm-project/pull/111756