[PATCH] D35923: Fix PR32332 - PCM nondeterminism with builtins caused by global module index

[Doug Gregor via Phabricator via cfe-commits]

doug.gregor added a comment.

I am *very* concerned about this. The optimization that avoids doing lookups within module files where we "know" we won't find anything was very important at the time it was introduced, so I'd like to understand better why it didn't make a significant difference in your benchmarks before we disable it. (Especially because of built-ins; those are Very Weird and probably modeled wrong).


https://reviews.llvm.org/D35923