Add examples dir, built with BUILD_EXAMPLES=1 (Makefiles, no CMake equivalent yet).

Move tools/wpa to examples/wpa, and unbreak its build.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@88825 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 111 insertions, 0 deletions

diff --git a/examples/Makefile b/examples/Makefile
new file mode 100644
index 0000000000..e6ae4b32cb
--- /dev/null
+++ b/examples/Makefile
@@ -0,0 +1,14 @@
+##===- examples/Makefile -----------------------------------*- Makefile -*-===##
+#
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../../..
+
+PARALLEL_DIRS := wpa
+
+include $(LEVEL)/Makefile.common
diff --git a/examples/wpa/CMakeLists.txt b/examples/wpa/CMakeLists.txt
new file mode 100644
index 0000000000..5553474b4b
--- /dev/null
+++ b/examples/wpa/CMakeLists.txt
@@ -0,0 +1,20 @@
+set(LLVM_NO_RTTI 1)
+
+set( LLVM_USED_LIBS
+  clangFrontend
+  clangAnalysis
+  clangSema
+  clangAST
+  clangLex
+  clangBasic
+  clangIndex
+  )
+
+set( LLVM_LINK_COMPONENTS
+    mc
+  )
+
+add_clang_executable(clang-wpa
+  clang-wpa.cpp
+  )
+add_dependencies(clang-wpa clang-headers)
diff --git a/examples/wpa/Makefile b/examples/wpa/Makefile
new file mode 100644
index 0000000000..01dbd11b8d
--- /dev/null
+++ b/examples/wpa/Makefile
@@ -0,0 +1,16 @@
+LEVEL = ../../../..
+
+TOOLNAME = clang-wpa
+CPPFLAGS += -I$(PROJ_SRC_DIR)/../../include -I$(PROJ_OBJ_DIR)/../../include
+CXXFLAGS = -fno-rtti
+NO_INSTALL = 1
+
+# No plugins, optimize startup time.
+TOOL_NO_EXPORTS = 1
+
+include $(LEVEL)/Makefile.config
+
+LINK_COMPONENTS := bitreader mc
+USEDLIBS = clangFrontend.a clangSema.a clangAST.a clangLex.a clangBasic.a clangAnalysis.a clangIndex.a
+
+include $(LLVM_SRC_ROOT)/Makefile.rules
diff --git a/examples/wpa/clang-wpa.cpp b/examples/wpa/clang-wpa.cpp
new file mode 100644
index 0000000000..4a0fe49939
--- /dev/null
+++ b/examples/wpa/clang-wpa.cpp
@@ -0,0 +1,61 @@
+//===--- 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/Frontend/ASTUnit.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;
+
+  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, &ErrMsg, &DiagClient));
+
+    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]->getASTContext());
+
+  CG->ViewCallGraph();
+}