[llvm] [Support] Compact EnumEntry string storage (PR #202631)

[David Zbarsky via llvm-commits]

dzbarsky wrote:

> See also #202044 to remove EnumEntry entirely... this seems to be duplicate work?

Ooh I like your approach, that's nice. I'll close this out.

https://github.com/llvm/llvm-project/pull/202631