From: Stefan Behnel <scoder@users.berlios.de>
Date: Thu, 11 Nov 2010 13:32:32 +0000 (+0100)
Subject: skip None checks on a node if we know its constant value as being not None
X-Git-Tag: 0.14.alpha0~191
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=38d27e9219cc2e9f7e8b0a1f5339ee1846aa4537;p=cython.git

skip None checks on a node if we know its constant value as being not None
---

diff --git a/Cython/Compiler/ExprNodes.py b/Cython/Compiler/ExprNodes.py
index 4ff284ca..988048bd 100755
--- a/Cython/Compiler/ExprNodes.py
+++ b/Cython/Compiler/ExprNodes.py
@@ -651,7 +651,11 @@ class ExprNode(Node):
         return self.result_in_temp()
 
     def may_be_none(self):
-        return self.type.is_pyobject
+        if not self.type.is_pyobject:
+            return False
+        if self.constant_result not in (not_a_constant, constant_value_not_set):
+            return self.constant_result is not None
+        return True
 
     def as_cython_attribute(self):
         return None