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

[Owen Anderson]

Changes in directory llvm/lib/Transforms/Scalar:

GVNPRE.cpp updated: 1.42 -> 1.43
---
Log message:

Use a DenseMap instead of an std::map for the value numbering.  This reduces 
the time to optimize lencod on a PPC Debug build from ~300s to ~140s.


---
Diffs of the changes:  (+5 -4)

 GVNPRE.cpp |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)


Index: llvm/lib/Transforms/Scalar/GVNPRE.cpp
diff -u llvm/lib/Transforms/Scalar/GVNPRE.cpp:1.42 
llvm/lib/Transforms/Scalar/GVNPRE.cpp:1.43
--- llvm/lib/Transforms/Scalar/GVNPRE.cpp:1.42  Tue Jun 19 18:07:16 2007
+++ llvm/lib/Transforms/Scalar/GVNPRE.cpp       Tue Jun 19 18:23:54 2007
@@ -25,6 +25,7 @@
 #include "llvm/Function.h"
 #include "llvm/Analysis/Dominators.h"
 #include "llvm/Analysis/PostDominators.h"
+#include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/DepthFirstIterator.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/Support/CFG.h"
@@ -78,7 +79,7 @@
       };
     
     private:
-      std::map<Value*, uint32_t> valueNumbering;
+      DenseMap<Value*, uint32_t> valueNumbering;
       std::map<Expression, uint32_t> expressionNumbering;
   
       std::set<Expression> maximalExpressions;
@@ -217,7 +218,7 @@
 uint32_t ValueTable::lookup_or_add(Value* V) {
   maximalValues.insert(V);
 
-  std::map<Value*, uint32_t>::iterator VI = valueNumbering.find(V);
+  DenseMap<Value*, uint32_t>::iterator VI = valueNumbering.find(V);
   if (VI != valueNumbering.end())
     return VI->second;
   
@@ -255,7 +256,7 @@
 }
 
 uint32_t ValueTable::lookup(Value* V) {
-  std::map<Value*, uint32_t>::iterator VI = valueNumbering.find(V);
+  DenseMap<Value*, uint32_t>::iterator VI = valueNumbering.find(V);
   if (VI != valueNumbering.end())
     return VI->second;
   else
@@ -265,7 +266,7 @@
 }
 
 void ValueTable::add(Value* V, uint32_t num) {
-  std::map<Value*, uint32_t>::iterator VI = valueNumbering.find(V);
+  DenseMap<Value*, uint32_t>::iterator VI = valueNumbering.find(V);
   if (VI != valueNumbering.end())
     valueNumbering.erase(VI);
   valueNumbering.insert(std::make_pair(V, num));



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