From: Stefan Behnel <scoder@users.berlios.de>
Date: Fri, 28 Nov 2008 09:11:54 +0000 (+0100)
Subject: fix final optimisations for calls inside of assignments
X-Git-Tag: 0.11-beta~192
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=83781ad5acc27477905d9c9d421cbc5a91f2bae8;p=cython.git

fix final optimisations for calls inside of assignments
---

diff --git a/Cython/Compiler/Optimize.py b/Cython/Compiler/Optimize.py
index c587bbd5..c47a1989 100644
--- a/Cython/Compiler/Optimize.py
+++ b/Cython/Compiler/Optimize.py
@@ -350,6 +350,10 @@ class FinalOptimizePhase(Visitor.CythonTransform):
         - isinstance -> typecheck for cdef types
     """
     def visit_SingleAssignmentNode(self, node):
+        """Avoid redundant initialisation of local variables before their
+        first assignment.
+        """
+        self.visitchildren(node)
         if node.first:
             lhs = node.lhs
             lhs.lhs_of_first_assignment = True
@@ -360,6 +364,9 @@ class FinalOptimizePhase(Visitor.CythonTransform):
         return node
 
     def visit_SimpleCallNode(self, node):
+        """Replace generic calls to isinstance(x, type) by a more efficient
+        type check.
+        """
         self.visitchildren(node)
         if node.function.type.is_cfunction and isinstance(node.function, ExprNodes.NameNode):
             if node.function.name == 'isinstance':