[PATCH] D26432: [SCCP] Force unknown branches to overdefined

[Davide Italiano via llvm-commits]

davide added a comment.

This fixes the miscompile reported in PR30448. I tried  on many internal tests and bootstrapping clang, and it works without problems. We lose some optimization power, but it seems that the pattern is rare enough so we shouldn't really worry.


https://reviews.llvm.org/D26432