1 files changed, 62 insertions, 0 deletions
diff --git a/tools/wpa/clang-wpa.cpp b/tools/wpa/clang-wpa.cpp
new file mode 100644
index 0000000000000..fa2326dc2ba44
--- /dev/null
+++ b/tools/wpa/clang-wpa.cpp
@@ -0,0 +1,62 @@
+//===--- clang-wpa.cpp - clang whole program analyzer ---------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This tool reads a sequence of precompiled AST files, and do various
+// cross translation unit analyses.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Analysis/CallGraph.h"
+
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Frontend/TextDiagnosticBuffer.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace clang;
+using namespace idx;
+
+static llvm::cl::list<std::string>
+InputFilenames(llvm::cl::Positional, llvm::cl::desc("<input AST files>"));
+
+int main(int argc, char **argv) {
+  llvm::cl::ParseCommandLineOptions(argc, argv, "clang-wpa");
+  FileManager FileMgr;
+  std::vector<ASTUnit*> ASTUnits;
+
+  if (InputFilenames.empty())
+    return 0;
+
+  TextDiagnosticBuffer DiagClient;
+  Diagnostic Diags(&DiagClient);
+
+  for (unsigned i = 0, e = InputFilenames.size(); i != e; ++i) {
+    const std::string &InFile = InputFilenames[i];
+
+    std::string ErrMsg;
+    llvm::OwningPtr<ASTUnit> AST;
+
+    AST.reset(ASTUnit::LoadFromPCHFile(InFile, Diags, FileMgr, &ErrMsg));
+
+    if (!AST) {
+      llvm::errs() << "[" << InFile << "] error: " << ErrMsg << '\n';
+      return 1;
+    }
+
+    ASTUnits.push_back(AST.take());
+  }
+
+  llvm::OwningPtr<CallGraph> CG;
+  CG.reset(new CallGraph());
+
+  for (unsigned i = 0, e = ASTUnits.size(); i != e; ++i)
+    CG->addTU(*ASTUnits[i]);
+
+  CG->ViewCallGraph();
+}