[llvm-commits] [llvm] r46658 - /llvm/trunk/lib/VMCore/PassManager.cpp

[Devang Patel]

Author: dpatel
Date: Fri Feb  1 19:43:30 2008
New Revision: 46658

URL: http://llvm.org/viewvc/llvm-project?rev=46658&view=rev
Log:
Add comment explaining what is lower level analysis pass.

Modified:
    llvm/trunk/lib/VMCore/PassManager.cpp

Modified: llvm/trunk/lib/VMCore/PassManager.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/VMCore/PassManager.cpp?rev=46658&r1=46657&r2=46658&view=diff

==============================================================================
--- llvm/trunk/lib/VMCore/PassManager.cpp (original)
+++ llvm/trunk/lib/VMCore/PassManager.cpp Fri Feb  1 19:43:30 2008
@@ -921,6 +921,16 @@
     TPM->dumpArguments();
     TPM->dumpPasses();
   }
+
+  // Module Level pass may required Function Level analysis info 
+  // (e.g. dominator info). Pass manager uses on the fly function pass manager 
+  // to provide this on demand. In that case, in Pass manager terminology, 
+  // module level pass is requiring lower level analysis info managed by
+  // lower level pass manager.
+
+  // When Pass manager is not able to order required analysis info, Pass manager
+  // checks whether any lower level manager will be able to provide this 
+  // analysis info on demand or not.
   assert (0 && "Unable to handle Pass that requires lower level Analysis pass");
 }