[llvm-commits] [PATCH 19/20] [AVX] Make FieldInit Unique

[David Greene]

Make sure FieldInits are unique and created only once.
---
 utils/TableGen/Record.cpp |   16 +++++++++++++++-
 1 files changed, 15 insertions(+), 1 deletions(-)

diff --git oldutils/TableGen/Record.cpp newutils/TableGen/Record.cpp
index ef1601e..cf82255 100644
--- oldutils/TableGen/Record.cpp
+++ newutils/TableGen/Record.cpp
@@ -1499,7 +1499,21 @@ std::string DefInit::getAsString() const {
 }
 
 const FieldInit *FieldInit::get(const Init *R, const std::string &FN) {
-  return new FieldInit(R, FN);
+  typedef std::pair<const Init *, std::string> Key;
+  typedef DenseMap<Key, FieldInit *> Pool;
+  static Pool ThePool;  
+
+  Key TheKey(std::make_pair(R, FN));
+  Pool::iterator Result = ThePool.find(TheKey);
+ 
+  if (Result == ThePool.end()) {
+    FieldInit *New = new FieldInit(R, FN);
+    bool Inserted = false;
+    tie(Result, Inserted) = ThePool.insert(std::make_pair(TheKey, New));
+    assert(Inserted && "Did not insert new Init into pool!");
+  }
+    
+  return Result->second;
 }
 
 const Init *FieldInit::resolveBitReference(Record &R, const RecordVal *RV,
-- 
1.7.6