Update comments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31713 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/VMCore/PassManager.cpp b/lib/VMCore/PassManager.cpp
index 81753a1..c3af45e 100644
--- a/lib/VMCore/PassManager.cpp
+++ b/lib/VMCore/PassManager.cpp
@@ -62,10 +62,16 @@
}
private:
- // Analysis required by the passes managed by this manager
+ // Analysis required by the passes managed by this manager. This information
+ // used while selecting pass manager during addPass. If a pass does not
+ // preserve any analysis required by other passes managed by current
+ // pass manager then new pass manager is used.
std::vector<AnalysisID> RequiredAnalysis;
- // set of available Analysis
+ // Set of available Analysis. This information is used while scheduling
+ // pass. If a pass requires an analysis which is not not available then
+ // equired analysis pass is scheduled to run before the pass itself is
+ // scheduled to run.
std::set<AnalysisID> AvailableAnalysis;
// Collection of pass that are managed by this manager
@@ -510,9 +516,6 @@
}
addPass(P);
-
- // TODO : Walk through all managers and remove not preserved analysis
- // TODO : remove dead passes
}
/// Schedule all passes from the queue by adding them in their