Add -output-prefix option to bugpoint (to change the default output name).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81154 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/bugpoint/ExtractFunction.cpp b/tools/bugpoint/ExtractFunction.cpp
index a54f51b..df9277c 100644
--- a/tools/bugpoint/ExtractFunction.cpp
+++ b/tools/bugpoint/ExtractFunction.cpp
@@ -37,6 +37,7 @@
 
 namespace llvm {
   bool DisableSimplifyCFG = false;
+  extern cl::opt<std::string> OutputPrefix;
 } // End llvm namespace
 
 namespace {
@@ -324,7 +325,7 @@
                                                  Module *M) {
   char *ExtraArg = NULL;
 
-  sys::Path uniqueFilename("bugpoint-extractblocks");
+  sys::Path uniqueFilename(OutputPrefix + "-extractblocks");
   std::string ErrMsg;
   if (uniqueFilename.createTemporaryFileOnDisk(true, &ErrMsg)) {
     outs() << "*** Basic Block extraction failed!\n";