[PATCH] D33587: [DAGCombine] Do several rounds of combine.

[Amaury SECHET via Phabricator via llvm-commits]

deadalnix added a comment.

So on the full clang bc, post optimization:

Without this patch:

  real    9m26.373s
  user    9m24.256s
  sys     0m1.948s

With this patch:

  real    9m44.870s
  user    9m42.484s
  sys     0m2.228s


https://reviews.llvm.org/D33587