[pypy-svn] pypy default: do nothing if we are trying to cast something into the very same type

[antocuni]

Author: Antonio Cuni <anto.cuni at gmail.com>
Branch: 
Changeset: r43291:cfa47b6c5890
Date: 2011-04-11 11:05 +0000
http://bitbucket.org/pypy/pypy/changeset/cfa47b6c5890/

Log:	do nothing if we are trying to cast something into the very same
	type

diff --git a/pypy/translator/jvm/metavm.py b/pypy/translator/jvm/metavm.py
--- a/pypy/translator/jvm/metavm.py
+++ b/pypy/translator/jvm/metavm.py
@@ -105,6 +105,8 @@
     def render(self, generator, op):
         FROM = op.args[0].concretetype
         TO = op.result.concretetype
+        if TO == FROM:
+            return
         opcode = CASTS[(FROM, TO)]
         if opcode:
             generator.emit(opcode)