From: Chris Lattner <sabre@nondot.org>
Date: Tue, 16 Mar 2004 01:45:55 +0000 (+0000)
Subject: Fix PR294
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6ae9eb1566685241eb8eced2b0ebfb8dbb3d5b3f;p=oota-llvm.git

Fix PR294


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12425 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/RegAllocSimple.cpp b/lib/CodeGen/RegAllocSimple.cpp
index cd48cd2af54..1b7f5471b42 100644
--- a/lib/CodeGen/RegAllocSimple.cpp
+++ b/lib/CodeGen/RegAllocSimple.cpp
@@ -172,7 +172,8 @@ void RegAllocSimple::AllocateBasicBlock(MachineBasicBlock &MBB) {
     for (int i = MI->getNumOperands() - 1; i >= 0; --i) {
       MachineOperand &op = MI->getOperand(i);
       
-      if (op.isRegister() && MRegisterInfo::isVirtualRegister(op.getReg())) {
+      if (op.isRegister() && op.getReg() &&
+          MRegisterInfo::isVirtualRegister(op.getReg())) {
         unsigned virtualReg = (unsigned) op.getReg();
         DEBUG(std::cerr << "op: " << op << "\n");
         DEBUG(std::cerr << "\t inst[" << i << "]: ";