From b41d838d28a64369f8a804bfd2bc0899115e60cc Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Fri, 7 Dec 2007 21:30:01 +0000
Subject: [PATCH] Add comment.

llvm-svn: 44686
---
 llvm/lib/Target/X86/X86ISelLowering.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 2653481418a1..c0001c0f974f 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -2758,6 +2758,8 @@ static SDOperand CommuteVectorShuffle(SDOperand Op, SDOperand &V1,
   return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, Mask);
 }
 
+/// CommuteVectorShuffleMask - Change values in a shuffle permute mask assuming
+/// the two vector operands have swapped position.
 static
 SDOperand CommuteVectorShuffleMask(SDOperand Mask, SelectionDAG &DAG) {
   MVT::ValueType MaskVT = Mask.getValueType();