tree e46c140ff2a70dffe321fb6ea747899c24296315
parent ad360c850d4f1aa41f3eca59eda44e5a4e1658a8
author Chijun Sima <simachijun@gmail.com> 1531368494 +0000
committer Chijun Sima <simachijun@gmail.com> 1531368494 +0000

[Dominators] Add isUpdateLazy() method to the DomTreeUpdater

Summary:
Previously, when people need to deal with DTU with different UpdateStrategy using different actions, they need to
```
if (DTU.getUpdateStrategy() == DomTreeUpdater::UpdateStrategy::Lazy) {
  ...
}
if (DTU.getUpdateStrategy() == DomTreeUpdater::UpdateStrategy::Eager) {
  ...
}
```
After the patch, they can avoid code patterns above
```
if (DTU.isUpdateLazy()){
  ...
}
if (!DTU.isUpdateLazy()){
  ...
}
```

Reviewers: kuhar, brzycki, dmgreen

Reviewed By: kuhar

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D49056

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@336886 91177308-0d34-0410-b5e6-96231b3b80d8