From 1cf47cb21728c84342b15d9695b8a2433b3315a2 Mon Sep 17 00:00:00 2001 From: Devang Patel Date: Sat, 2 Feb 2008 01:43:30 +0000 Subject: [PATCH] Add comment explaining what is lower level analysis pass. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46658 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/VMCore/PassManager.cpp | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/lib/VMCore/PassManager.cpp b/lib/VMCore/PassManager.cpp index ae73373b857..5620d0f886c 100644 --- a/lib/VMCore/PassManager.cpp +++ b/lib/VMCore/PassManager.cpp @@ -921,6 +921,16 @@ void PMDataManager::addLowerLevelRequiredPass(Pass *P, Pass *RequiredPass) { 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"); }