tree 06d194938fdc4200c5f2364dad927f255cad8c33
parent b0dc5345a6a24ccef7ded5f976e38e2863855fca
author Mikaël Peltier <mikaelpeltier@google.com> 1523369578 +0200
committer Mikaël Peltier <mikaelpeltier@google.com> 1523369578 +0200

Avoid to compute dominator tree when is not useful

- Now, commonSubexpressionElimination computes dominator tree
only if it is needed. when compiling framework, it allows to save
71862(~54%) builds of dominator tree.

Bug: 74712202
Change-Id: Id3db10e24b2bd16996c01cb6a209b581d828fdec