[PATCH] D44564: [InstSimplify] Look at the whole PHI graph when simplifying a PHI node

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

My primary concern here is that SimplifyInstruction needs to be "constant" time; if you put a linear traversal over the entire function here, you'll cause compile-time explosions all over the compiler.


Repository:
  rL LLVM

https://reviews.llvm.org/D44564