From c4aacac056168b9e2bdd52f1befa06a01c22c65e Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sat, 28 Oct 2006 18:21:51 +0000
Subject: [PATCH] add an assertion

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31272 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/CodeGen/MachineJumpTableInfo.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/llvm/CodeGen/MachineJumpTableInfo.h b/include/llvm/CodeGen/MachineJumpTableInfo.h
index 2d640a7cb10..aa2981c4bbd 100644
--- a/include/llvm/CodeGen/MachineJumpTableInfo.h
+++ b/include/llvm/CodeGen/MachineJumpTableInfo.h
@@ -64,6 +64,7 @@ public:
   /// ReplaceMBBInJumpTables - If Old is the target of any jump tables, update
   /// the jump tables to branch to New instead.
   bool ReplaceMBBInJumpTables(MachineBasicBlock *Old, MachineBasicBlock *New) {
+    assert(Old != New && "Not making a change?");
     bool MadeChange = false;
     for (unsigned i = 0, e = JumpTables.size(); i != e; ++i) {
       MachineJumpTableEntry &JTE = JumpTables[i];