From 7902d8fd027e4a20781ae7c5c8989740461fe5bf Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Fri, 23 Apr 2004 20:36:51 +0000
Subject: [PATCH] Teach bugpoint to be a little bit smarter and avoid repeating
 work

llvm-svn: 13132
---
 tools/bugpoint/Miscompilation.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/bugpoint/Miscompilation.cpp b/tools/bugpoint/Miscompilation.cpp
index cda0098f887..3e532226b95 100644
--- a/tools/bugpoint/Miscompilation.cpp
+++ b/tools/bugpoint/Miscompilation.cpp
@@ -108,7 +108,11 @@ ReduceMiscompilingPasses::doTest(std::vector<const PassInfo*> &Prefix,
     exit(1);
   }
   removeFile(BytecodeResult);  // No longer need the file on disk
-    
+
+  // Don't check if there are no passes in the suffix.
+  if (Suffix.empty())
+    return NoFailure;
+  
   std::cout << "Checking to see if '" << getPassesString(Suffix)
             << "' passes compile correctly after the '"
             << getPassesString(Prefix) << "' passes: ";