From: Chris Lattner <sabre@nondot.org>
Date: Sat, 5 Jan 2008 01:39:17 +0000 (+0000)
Subject: fix a common crash.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=9bb459b55411c45175e599f6f421b7a57060ee57;p=oota-llvm.git

fix a common crash.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45614 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/MachineSink.cpp b/lib/CodeGen/MachineSink.cpp
index 0665e87f67a..dff60f6d395 100644
--- a/lib/CodeGen/MachineSink.cpp
+++ b/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);