[llvm-commits] [llvm] r136496 - /llvm/trunk/utils/TableGen/Record.cpp

[David Greene]

Author: greened
Date: Fri Jul 29 14:07:20 2011
New Revision: 136496

URL: http://llvm.org/viewvc/llvm-project?rev=136496&view=rev
Log:
[AVX] Make TernOpInit Unique

Make sure TernOpInits 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=136496&r1=136495&r2=136496&view=diff
==============================================================================
--- llvm/trunk/utils/TableGen/Record.cpp (original)
+++ llvm/trunk/utils/TableGen/Record.cpp Fri Jul 29 14:07:20 2011
@@ -975,7 +975,26 @@
 const TernOpInit *TernOpInit::get(TernaryOp opc, const Init *lhs,
                                   const Init *mhs, const Init *rhs,
                                   RecTy *Type) {
-  return new TernOpInit(opc, lhs, mhs, rhs, Type);
+  typedef std::pair<
+    std::pair<
+      std::pair<std::pair<unsigned, RecTy *>, const Init *>,
+      const Init *
+      >,
+    const Init *
+    > Key;
+
+  typedef DenseMap<Key, TernOpInit *> Pool;
+  static Pool ThePool;
+
+  Key TheKey(std::make_pair(std::make_pair(std::make_pair(std::make_pair(opc,
+                                                                         Type),
+                                                          lhs),
+                                           mhs),
+                            rhs));
+
+  TernOpInit *&I = ThePool[TheKey];
+  if (!I) I = new TernOpInit(opc, lhs, mhs, rhs, Type);
+  return I;
 }
 
 static const Init *ForeachHelper(const Init *LHS, const Init *MHS,