[PATCH] D46648: [SimplifyLibcalls] Optimize string concats using s(n)printf

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

The C standard is very clear: "If copying takes place between objects that overlap, the behavior is undefined."  There is no exception for format strings which start with %s.


Repository:
  rL LLVM

https://reviews.llvm.org/D46648