From 7cbf5a803e58b844a537cbf63eb0364d01a842a1 Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Mon, 1 Mar 2010 17:56:04 +0000
Subject: [PATCH] Add a comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97459 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Analysis/ScalarEvolutionAliasAnalysis.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/Analysis/ScalarEvolutionAliasAnalysis.cpp b/lib/Analysis/ScalarEvolutionAliasAnalysis.cpp
index 564ec4b1166..17b254fca60 100644
--- a/lib/Analysis/ScalarEvolutionAliasAnalysis.cpp
+++ b/lib/Analysis/ScalarEvolutionAliasAnalysis.cpp
@@ -10,6 +10,10 @@
 // This file defines the ScalarEvolutionAliasAnalysis pass, which implements a
 // simple alias analysis implemented in terms of ScalarEvolution queries.
 //
+// This differs from traditional loop dependence analysis in that it tests
+// for dependencies within a single iteration of a loop, rather than
+// dependences between different iterations.
+//
 // ScalarEvolution has a more complete understanding of pointer arithmetic
 // than BasicAliasAnalysis' collection of ad-hoc analyses.
 //
@@ -41,7 +45,7 @@ namespace {
         return (AliasAnalysis*)this;
       return this;
     }
-                                         
+
   private:
     virtual void getAnalysisUsage(AnalysisUsage &AU) const;
     virtual bool runOnFunction(Function &F);