From: Dan Gohman <gohman@apple.com>
Date: Sat, 26 Sep 2009 15:09:53 +0000 (+0000)
Subject: Add a comment describing natural loops.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b7532e254810aba26da9b65ee2c65788695f8c30;p=oota-llvm.git

Add a comment describing natural loops.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82859 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/Analysis/LoopInfo.h b/include/llvm/Analysis/LoopInfo.h
index a928ccdb8ef..bed7608b11e 100644
--- a/include/llvm/Analysis/LoopInfo.h
+++ b/include/llvm/Analysis/LoopInfo.h
@@ -8,7 +8,8 @@
 //===----------------------------------------------------------------------===//
 //
 // This file defines the LoopInfo class that is used to identify natural loops
-// and determine the loop depth of various nodes of the CFG.  Note that natural
+// and determine the loop depth of various nodes of the CFG.  A natural loop
+// has exactly one entry-point, which is called the header. Note that natural
 // loops may actually be several loops that share the same header node.
 //
 // This analysis calculates the nesting structure of loops in a function.  For