diff options
Diffstat (limited to 'lib/Analysis/LoopPass.cpp')
| -rw-r--r-- | lib/Analysis/LoopPass.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Analysis/LoopPass.cpp b/lib/Analysis/LoopPass.cpp index 1540112fe10c..acf2ba63bd32 100644 --- a/lib/Analysis/LoopPass.cpp +++ b/lib/Analysis/LoopPass.cpp @@ -188,6 +188,10 @@ bool LPPassManager::runOnFunction(Function &F) { // advantage in deleting uses in a later loop before optimizing the // definitions in an earlier loop. If we find a clear reason to process in // forward order, then a forward variant of LoopPassManager should be created. + // + // Note that LoopInfo::iterator visits loops in reverse program + // order. Here, reverse_iterator gives us a forward order, and the LoopQueue + // reverses the order a third time by popping from the back. for (LoopInfo::reverse_iterator I = LI->rbegin(), E = LI->rend(); I != E; ++I) addLoopIntoQueue(*I, LQ); |