From d34b25769269002cb1d554bfdf70dfd59079fc44 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Wed, 5 Jan 2005 16:27:34 +0000
Subject: [PATCH] add an assertion

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19290 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/CodeGen/SSARegMap.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/llvm/CodeGen/SSARegMap.h b/include/llvm/CodeGen/SSARegMap.h
index 893b0c71670..43eee10c5c5 100644
--- a/include/llvm/CodeGen/SSARegMap.h
+++ b/include/llvm/CodeGen/SSARegMap.h
@@ -39,6 +39,7 @@ class SSARegMap {
   /// function with the specified register class.
   ///
   unsigned createVirtualRegister(const TargetRegisterClass *RegClass) {
+    assert(RegClass && "Cannot create register without RegClass!");
     RegClassMap.grow(NextRegNum);
     RegClassMap[NextRegNum] = RegClass;
     return NextRegNum++;