From: Andrew Trick <atrick@apple.com>
Date: Thu, 24 Oct 2013 00:43:38 +0000 (+0000)
Subject: Clarify comments in genLoopLimit.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=577ac566c45670cd8ef03e202cb92258c643574d;p=oota-llvm.git

Clarify comments in genLoopLimit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193292 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Scalar/IndVarSimplify.cpp b/lib/Transforms/Scalar/IndVarSimplify.cpp
index 9c092e6077e..7785855d0e1 100644
--- a/lib/Transforms/Scalar/IndVarSimplify.cpp
+++ b/lib/Transforms/Scalar/IndVarSimplify.cpp
@@ -1506,9 +1506,10 @@ static Value *genLoopLimit(PHINode *IndVar, const SCEV *IVCount, Loop *L,
     // BECount = (IVEnd - IVInit - 1) => IVLimit = IVInit (postinc).
     //
     // Valid Cases: (1) both integers is most common; (2) both may be pointers
-    // for simple memset-style loops; (3) IVInit is an integer and IVCount is a
-    // pointer may occur when enable-iv-rewrite generates a canonical IV on top
-    // of case #2.
+    // for simple memset-style loops.
+    //
+    // IVInit integer and IVCount pointer would only occur if a canonical IV
+    // were generated on top of case #2, which is not expected.
 
     const SCEV *IVLimit = 0;
     // For unit stride, IVCount = Start + BECount with 2's complement overflow.