[llvm-commits] CVS: llvm/lib/Transforms/Scalar/GVNPRE.cpp

[Owen Anderson]

Changes in directory llvm/lib/Transforms/Scalar:

GVNPRE.cpp updated: 1.26 -> 1.27
---
Log message:

Collect statistics from GVN-PRE.


---
Diffs of the changes:  (+9 -0)

 GVNPRE.cpp |    9 +++++++++
 1 files changed, 9 insertions(+)


Index: llvm/lib/Transforms/Scalar/GVNPRE.cpp
diff -u llvm/lib/Transforms/Scalar/GVNPRE.cpp:1.26 
llvm/lib/Transforms/Scalar/GVNPRE.cpp:1.27
--- llvm/lib/Transforms/Scalar/GVNPRE.cpp:1.26  Fri Jun  8 15:57:08 2007
+++ llvm/lib/Transforms/Scalar/GVNPRE.cpp       Fri Jun  8 17:02:36 2007
@@ -114,6 +114,10 @@
                        "Global Value Numbering/Partial Redundancy 
Elimination");
 
 
+STATISTIC(NumInsertedVals, "Number of values inserted");
+STATISTIC(NumInsertedPhis, "Number of PHI nodes inserted");
+STATISTIC(NumEliminated, "Number of redundant instructions eliminated");
+
 
 bool GVNPRE::add(Value* V, uint32_t number) {
   std::pair<ValueTable::iterator, bool> ret = VN.insert(std::make_pair(V, 
number));
@@ -618,6 +622,8 @@
                   if (av != avail.end())
                     avail.erase(av);
                   avail.insert(std::make_pair(*PI, newVal));
+                  
+                  ++NumInsertedVals;
                 }
               }
               
@@ -655,6 +661,8 @@
               DOUT << "\n\n";
               
               new_set.insert(p);
+              
+              ++NumInsertedPhis;
             }
           }
         }
@@ -688,6 +696,7 @@
             if (Instr->getParent() != 0 && Instr != BI) {
               replace.push_back(std::make_pair(BI, leader));
               erase.push_back(BI);
+              ++NumEliminated;
             }
       }
     }



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