Add debug output

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11139 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/Transforms/Scalar/GCSE.cpp b/lib/Transforms/Scalar/GCSE.cpp
index 3d700cb4da..eb74b7c0a4 100644
--- a/lib/Transforms/Scalar/GCSE.cpp
+++ b/lib/Transforms/Scalar/GCSE.cpp
@@ -21,6 +21,7 @@
 #include "llvm/Analysis/ValueNumbering.h"
 #include "llvm/Support/InstIterator.h"
 #include "Support/Statistic.h"
+#include "Support/Debug.h"
 #include <algorithm>
 using namespace llvm;
 
@@ -165,6 +166,9 @@ bool GCSE::EliminateRedundancies(Instruction *I,
 //
 void GCSE::ReplaceInstWithInst(Instruction *First, BasicBlock::iterator SI) {
   Instruction &Second = *SI;
+
+  DEBUG(std::cerr << "GCSE: Substituting %" << First->getName() << " for: "
+                  << Second);
   
   //cerr << "DEL " << (void*)Second << Second;