From eb5a9d34d66801377ce06f917624ec1d47a90816 Mon Sep 17 00:00:00 2001
From: Andreas Neustifter <astifter-llvm@gmx.at>
Date: Tue, 1 Sep 2009 10:08:39 +0000
Subject: [PATCH] Preparation for Optimal Edge Profiling: Add statistics for
 regular edge profiling, this enables the comparation of the number of edges
 inserted by regular and optimal edge profiling.

llvm-svn: 80668
---
 llvm/lib/Transforms/Instrumentation/EdgeProfiling.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Transforms/Instrumentation/EdgeProfiling.cpp b/llvm/lib/Transforms/Instrumentation/EdgeProfiling.cpp
index ed9ff5087750..b9cb275578e0 100644
--- a/llvm/lib/Transforms/Instrumentation/EdgeProfiling.cpp
+++ b/llvm/lib/Transforms/Instrumentation/EdgeProfiling.cpp
@@ -16,7 +16,7 @@
 // number of counters inserted.
 //
 //===----------------------------------------------------------------------===//
-
+#define DEBUG_TYPE "insert-edge-profiling"
 #include "ProfilingUtils.h"
 #include "llvm/Module.h"
 #include "llvm/Pass.h"
@@ -24,15 +24,22 @@
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Transforms/Utils/BasicBlockUtils.h"
 #include "llvm/Transforms/Instrumentation.h"
+#include "llvm/ADT/Statistic.h"
 #include <set>
 using namespace llvm;
 
+STATISTIC(NumEdgesInserted, "The # of edges inserted.");
+
 namespace {
   class VISIBILITY_HIDDEN EdgeProfiler : public ModulePass {
     bool runOnModule(Module &M);
   public:
     static char ID; // Pass identification, replacement for typeid
     EdgeProfiler() : ModulePass(&ID) {}
+
+    virtual const char *getPassName() const {
+      return "Edge Profiler";
+    }
   };
 }
 
@@ -69,6 +76,7 @@ bool EdgeProfiler::runOnModule(Module &M) {
   GlobalVariable *Counters =
     new GlobalVariable(M, ATy, false, GlobalValue::InternalLinkage,
                        Constant::getNullValue(ATy), "EdgeProfCounters");
+  NumEdgesInserted = NumEdges;
 
   // Instrument all of the edges...
   unsigned i = 0;