1 files changed, 67 insertions, 0 deletions
diff --git a/tools/lto-bugpoint/lto-bugpoint.cpp b/tools/lto-bugpoint/lto-bugpoint.cpp
new file mode 100644
index 0000000000..8633415d65
--- /dev/null
+++ b/tools/lto-bugpoint/lto-bugpoint.cpp
@@ -0,0 +1,67 @@
+//===- lto-bugpoing.cpp - The lto-bugpoint driver -------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// lto-bugpoint tool identifies minmal set of bitcode files that is causing
+// failure when Link Time Optimization is enabled. The failure is identified
+// using developer provided validation script.
+//
+//===----------------------------------------------------------------------===//
+
+#include "LTOBugPoint.h"
+#include <iostream>
+#include <fstream>
+
+int main(int argc, char **argv) {
+  try {
+
+    if (argc !=  4) {
+      std::cerr << "Invalid number of lto-bugpoint arguments!\n";
+      return 1;
+    }
+    
+    std::ios::openmode input_mode = std::ios::in;
+
+    // First argument is linker command line options file. This text file
+    // is a list of linker command line options, one option per line.
+    // First line always list the absolute path to invoke the linker.
+    std::istream *LinkerArgsFile = new std::ifstream(argv[1], input_mode);
+    if (!LinkerArgsFile->good()) {
+      std::cerr << argv[0] << ": error opening " << argv[1] << "!\n";
+      return 1;
+    }
+
+    // Second argment is a text file that includes the linker input
+    // file paths, one input file path per line. 
+    std::istream *LinkerInputsFile = new std::ifstream(argv[2], input_mode);
+    if (!LinkerInputsFile->good()) {
+      std::cerr << argv[0] << ": error opening " << argv[2] << "!\n";
+      delete LinkerArgsFile;
+      return 1;
+    }
+
+    // Third argument is absolute path to the validation script. This
+    // script is used to validate LTO error under investigation.
+    std::istream *ValidationScriptFile = new std::ifstream(argv[3], input_mode);
+    if (!ValidationScriptFile->good()) {
+      std::cerr << argv[0] << ": error opening " << argv[3] << "!\n";
+      delete LinkerArgsFile;
+      delete LinkerInputsFile;
+      return 1;
+    }
+
+    LTOBugPoint bugFinder(*LinkerArgsFile, *LinkerInputsFile);
+
+    return 0;
+  } catch (const std::string& msg) {
+    std::cerr << argv[0] << ": " << msg << "\n";
+  } catch (...) {
+    std::cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
+  }
+  return 1;
+}