From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Fri, 21 Dec 2012 18:38:09 +0000 (+0000)
Subject: Add a missing assertion, the null register has no register units.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=70fe6ecb6d0c3b556f2c4e3c1e5013da821beded;p=oota-llvm.git

Add a missing assertion, the null register has no register units.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170916 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/MC/MCRegisterInfo.h b/include/llvm/MC/MCRegisterInfo.h
index 1fe870ed142..f5b4dddc519 100644
--- a/include/llvm/MC/MCRegisterInfo.h
+++ b/include/llvm/MC/MCRegisterInfo.h
@@ -479,6 +479,7 @@ public:
   /// MCRegUnitIterator - Create an iterator that traverses the register units
   /// in Reg.
   MCRegUnitIterator(unsigned Reg, const MCRegisterInfo *MCRI) {
+    assert(Reg && "Null register has no regunits");
     // Decode the RegUnits MCRegisterDesc field.
     unsigned RU = MCRI->get(Reg).RegUnits;
     unsigned Scale = RU & 15;