[llvm-commits] [llvm] r136495 - /llvm/trunk/utils/TableGen/Record.cpp

[David Greene]

Author: greened
Date: Fri Jul 29 14:07:19 2011
New Revision: 136495

URL: http://llvm.org/viewvc/llvm-project?rev=136495&view=rev
Log:
[AVX] Make BinOpInit Unique

Make sure BinOpInits are unique and created only once.  This will be
important for AVX/SIMD as many operators will be used to generate
patterns and other relevant data.

Modified:
    llvm/trunk/utils/TableGen/Record.cpp

Modified: llvm/trunk/utils/TableGen/Record.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/TableGen/Record.cpp?rev=136495&r1=136494&r2=136495&view=diff
==============================================================================
--- llvm/trunk/utils/TableGen/Record.cpp (original)
+++ llvm/trunk/utils/TableGen/Record.cpp Fri Jul 29 14:07:19 2011
@@ -860,7 +860,20 @@
 
 const BinOpInit *BinOpInit::get(BinaryOp opc, const Init *lhs,
                                 const Init *rhs, RecTy *Type) {
-  return new BinOpInit(opc, lhs, rhs, Type);
+  typedef std::pair<
+    std::pair<std::pair<unsigned, const Init *>, const Init *>,
+    RecTy *
+    > Key;
+
+  typedef DenseMap<Key, BinOpInit *> Pool;
+  static Pool ThePool;  
+
+  Key TheKey(std::make_pair(std::make_pair(std::make_pair(opc, lhs), rhs),
+                            Type));
+
+  BinOpInit *&I = ThePool[TheKey];
+  if (!I) I = new BinOpInit(opc, lhs, rhs, Type);
+  return I;
 }
 
 const Init *BinOpInit::Fold(Record *CurRec, MultiClass *CurMultiClass) const {