From 2fc0977a988a49dacb0ca0954e40ddc4e8849d4c Mon Sep 17 00:00:00 2001
From: Andrew Trick <atrick@apple.com>
Date: Wed, 22 Feb 2012 18:34:49 +0000
Subject: [PATCH] Comment from code review

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151178 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/ScheduleDAGInstrs.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/CodeGen/ScheduleDAGInstrs.cpp b/lib/CodeGen/ScheduleDAGInstrs.cpp
index ddf445d7a94..02d07fa08c6 100644
--- a/lib/CodeGen/ScheduleDAGInstrs.cpp
+++ b/lib/CodeGen/ScheduleDAGInstrs.cpp
@@ -362,6 +362,7 @@ void ScheduleDAGInstrs::addVRegDefDeps(SUnit *SU, unsigned OperIdx) {
   unsigned Reg = MI->getOperand(OperIdx).getReg();
 
   // SSA defs do not have output/anti dependencies.
+  // The current operand is a def, so we have at least one.
   if (llvm::next(MRI.def_begin(Reg)) == MRI.def_end())
     return;