Teach bugpoint to be a little bit smarter and avoid repeating work

llvm-svn: 13132

1 files changed, 5 insertions, 1 deletions

diff --git a/llvm/tools/bugpoint/Miscompilation.cpp b/llvm/tools/bugpoint/Miscompilation.cpp
index cda0098f887..3e532226b95 100644
--- a/llvm/tools/bugpoint/Miscompilation.cpp
+++ b/llvm/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: ";