[PATCH] D22696: [CodeGenPrep] Skip merging empty case blocks

[David Li via llvm-commits]

davidxl added a comment.

Fixing this in CGP seems like papering over real problems in ISEL or machine function optimization passes. The reason is that such code may be written by the user (not created by CGP): e.g.

  switch( ..) {
     case 1:             // no empty block created for this
       break;
     case ..
           ...
    }


https://reviews.llvm.org/D22696