PassManagers.h).
- Add StopPassTimer() and StartPassTimer() to expose TimingInfo to
CallGraphPassManager
- Use these two APIs in CalLgraphPassManager to measure timings.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33638 91177308-0d34-0410-b5e6-96231b3b80d8