[MachineOutliner] Define MachineOutliner support in TargetOptions
Targets should be able to define whether or not they support the outliner
without the outliner being added to the pass pipeline. Before this, the
outliner pass would be added, and ask the target whether or not it supports the
outliner.
After this, it's possible to query the target in TargetPassConfig, before the
outliner pass is created. This ensures that passing -enable-machine-outliner
will not modify the pass pipeline of any target that does not support it.
https://reviews.llvm.org/D48683
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@335887 91177308-0d34-0410-b5e6-96231b3b80d8
9 files changed