From 6c34da5c124b49f0a96f8ff318b29640bf697f5f Mon Sep 17 00:00:00 2001
From: Houtan Bastani <houtan@dynare.org>
Date: Thu, 3 Sep 2015 14:25:06 +0200
Subject: [PATCH] raise cost of oPowerDeriv to always create a temporary
variable if it has been encountered at least twice
---
preprocessor/ExprNode.cc | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/preprocessor/ExprNode.cc b/preprocessor/ExprNode.cc
index a0b50e54c..c10a49002 100644
--- a/preprocessor/ExprNode.cc
+++ b/preprocessor/ExprNode.cc
@@ -2750,7 +2750,7 @@ BinaryOpNode::cost(const temporary_terms_t &temporary_terms, bool is_matlab) con
return cost + 990;
case oPower:
case oPowerDeriv:
- return cost + 1160;
+ return cost + (MIN_COST_MATLAB/2+1);
case oEqual:
return cost;
}
@@ -2775,8 +2775,9 @@ BinaryOpNode::cost(const temporary_terms_t &temporary_terms, bool is_matlab) con
case oDivide:
return cost + 15;
case oPower:
- case oPowerDeriv:
return cost + 520;
+ case oPowerDeriv:
+ return cost + (MIN_COST_C/2+1);;
case oEqual:
return cost;
}
--
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