[pypy-svn] r28987 - pypy/dist/pypy/translator/c

[cfbolz at codespeak.net]

Author: cfbolz
Date: Tue Jun 20 13:36:13 2006
New Revision: 28987

Modified:
   pypy/dist/pypy/translator/c/exceptiontransform.py
Log:
small optimization in exception transformer: don't check for an exception in
the case of tail calls.


Modified: pypy/dist/pypy/translator/c/exceptiontransform.py
==============================================================================
--- pypy/dist/pypy/translator/c/exceptiontransform.py	(original)
+++ pypy/dist/pypy/translator/c/exceptiontransform.py	Tue Jun 20 13:36:13 2006
@@ -167,6 +167,12 @@
         if block.exitswitch == c_last_exception:
             need_exc_matching = True
             last_operation -= 1
+        elif (len(block.exits) == 1 and 
+              block.exits[0].target is graph.returnblock and
+              len(block.operations) and
+              (block.exits[0].args[0].concretetype is lltype.Void or
+               block.exits[0].args[0] is block.operations[-1].result)):
+            last_operation -= 1
         lastblock = block
         for i in range(last_operation, -1, -1):
             op = block.operations[i]