This patch moves the frontend timer from clang-cc into CompilerInstance.
CompilerInstance already contains various objects that are used
throughout the entire run.

Also addresses Daniels review comments in:

http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20091123/024508.html

llvm-svn: 90073
diff --git a/clang/lib/Frontend/CompilerInstance.cpp b/clang/lib/Frontend/CompilerInstance.cpp
index 872b771..1cb5993 100644
--- a/clang/lib/Frontend/CompilerInstance.cpp
+++ b/clang/lib/Frontend/CompilerInstance.cpp
@@ -27,6 +27,7 @@
 #include "llvm/LLVMContext.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/Timer.h"
 #include "llvm/System/Path.h"
 using namespace clang;
 
@@ -257,6 +258,10 @@
                                  llvm::outs()));
 }
 
+void CompilerInstance::createFrontendTimer() {
+  FrontendTimer.reset(new llvm::Timer("Clang front-end timer"));
+}
+
 CodeCompleteConsumer *
 CompilerInstance::createCodeCompletionConsumer(Preprocessor &PP,
                                                const std::string &Filename,