[PATCH] D39352: [SimplifyCFG] Don't do if-conversion if there is a long dependence chain

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

Rather than trying to prevent the flattening from happening in the first place, it might make more sense to reverse it later in the pass pipeline.  That would be more general, and avoid blocking other optimizations.  The x86 backend already does this in some limited cases; see X86CmovConversion.cpp.


https://reviews.llvm.org/D39352