From 6ec78274df2f8de1fe3c99a54e168c8d4ccf5cf5 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sat, 5 Jan 2008 01:39:17 +0000
Subject: fix a common crash.

llvm-svn: 45614
---
 llvm/lib/CodeGen/MachineSink.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'llvm/lib/CodeGen/MachineSink.cpp')

diff --git a/llvm/lib/CodeGen/MachineSink.cpp b/llvm/lib/CodeGen/MachineSink.cpp
index 0665e87f67a..dff60f6d395 100644
--- a/llvm/lib/CodeGen/MachineSink.cpp
+++ b/llvm/lib/CodeGen/MachineSink.cpp
@@ -180,6 +180,10 @@ bool MachineSinking::SinkInstruction(MachineInstr *MI) {
     }
   }
   
+  // If there are no outputs, it must have side-effects.
+  if (SuccToSinkTo == 0)
+    return false;
+  
   // FIXME: Check that the instr doesn't have side effects etc.
   
   DEBUG(cerr << "Sink instr " << *MI);
-- 
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