[pypy-svn] r80393 - pypy/extradoc/planning

[cfbolz at codespeak.net]

Author: cfbolz
Date: Fri Feb 25 18:10:18 2011
New Revision: 80393

Modified:
   pypy/extradoc/planning/jit.txt
Log:
two tasks


Modified: pypy/extradoc/planning/jit.txt
==============================================================================
--- pypy/extradoc/planning/jit.txt	(original)
+++ pypy/extradoc/planning/jit.txt	Fri Feb 25 18:10:18 2011
@@ -48,6 +48,12 @@
 - local imports should be jitted more efficiently, right now they produce a
   long trace and they are rather common (e.g. in translate.py)
 
+- don't use XCHG in the x86 backend, as that implies some sort of locking, that
+  we don't need and might be expensive.
+
+- the integer range analysis cannot deal with int_between, because it is
+  lowered to uint arithmetic too early
+
 OPTIMIZATIONS
 -------------