[llvm-commits] [PATCH 09/20] [AVX] Make IntInit Unique

[David Greene]

Use a DenseMap to make sure only one IntInit of any value exists.
---
 utils/TableGen/Record.cpp |   14 +++++++++++++-
 1 files changed, 13 insertions(+), 1 deletions(-)

diff --git oldutils/TableGen/Record.cpp newutils/TableGen/Record.cpp
index 4c019d3..dda0b71 100644
--- oldutils/TableGen/Record.cpp
+++ newutils/TableGen/Record.cpp
@@ -491,7 +491,19 @@ const Init *BitsInit::resolveReferences(Record &R, const RecordVal *RV) const {
 }
 
 const IntInit *IntInit::get(int64_t V) {
-  return new IntInit(V);
+  typedef DenseMap<int64_t, IntInit *> Pool;
+  static Pool ThePool;
+
+  Pool::iterator Result = ThePool.find(V);
+ 
+  if (Result == ThePool.end()) {
+    IntInit *New = new IntInit(V);
+    bool Inserted = false;
+    tie(Result, Inserted) = ThePool.insert(std::make_pair(V, New));
+    assert(Inserted && "Did not insert new Init into pool!");
+  }
+    
+  return Result->second;
 }
 
 std::string IntInit::getAsString() const {
-- 
1.7.6