[pypy-svn] r51917 - pypy/branch/jit-refactoring/pypy/jit/codegen/llgraph

[cfbolz at codespeak.net]

Author: cfbolz
Date: Thu Feb 28 16:03:13 2008
New Revision: 51917

Modified:
   pypy/branch/jit-refactoring/pypy/jit/codegen/llgraph/llimpl.py
Log:
oops. of course graphs can have no returnblock at all


Modified: pypy/branch/jit-refactoring/pypy/jit/codegen/llgraph/llimpl.py
==============================================================================
--- pypy/branch/jit-refactoring/pypy/jit/codegen/llgraph/llimpl.py	(original)
+++ pypy/branch/jit-refactoring/pypy/jit/codegen/llgraph/llimpl.py	Thu Feb 28 16:03:13 2008
@@ -604,8 +604,9 @@
     for block in graph.iterblocks():
         if block.exits == () and len(block.inputargs) == 1:
             returnblocks[block] = None
-    assert len(returnblocks) == 1, "ambiguous return block"
-    graph.returnblock = iter(returnblocks).next()
+    if returnblocks:
+        assert len(returnblocks) == 1, "ambiguous return block"
+        graph.returnblock = iter(returnblocks).next()
        
 
 def _buildgraph(graph):