From b8892f4147db738846f770805fb2a68570dfc514 Mon Sep 17 00:00:00 2001
From: trevor_hansen <trevor_hansen@e59a4935-1847-0410-ae03-e826735625c1>
Date: Sun, 30 May 2010 10:40:40 +0000
Subject: [PATCH] Small speedup in the cnf generator.

git-svn-id: https://stp-fast-prover.svn.sourceforge.net/svnroot/stp-fast-prover/trunk/stp@808 e59a4935-1847-0410-ae03-e826735625c1
---
 src/to-sat/ToCNF.cpp | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/to-sat/ToCNF.cpp b/src/to-sat/ToCNF.cpp
index 96b5bd5..27ac7a0 100644
--- a/src/to-sat/ToCNF.cpp
+++ b/src/to-sat/ToCNF.cpp
@@ -1359,10 +1359,16 @@ namespace BEEV
           {
             renamesibs = true;
           }
-        oldpsi = psi;
-        psi = ClauseList::PRODUCT(*psi, *clauses);
+
+        if (clauses->size() ==1)
+        	psi->INPLACE_PRODUCT(*clauses);
+        else
+        {
+            oldpsi = psi;
+        	psi = ClauseList::PRODUCT(*psi, *clauses);
+        	DELETE(oldpsi);
+        }
         reduceMemoryFootprintNeg(*it);
-        DELETE(oldpsi);
       }
 
     info[varphi]->clausesneg = psi;
-- 
2.47.3