[pypy-svn] pypy arm-backend-2: Move check for operation result down to compute correct longevities even in case of ignored operation results

[bivab]

Author: David Schneider <david.schneider at picle.org>
Branch: arm-backend-2
Changeset: r40667:5903949b2f63
Date: 2011-01-14 12:54 +0100
http://bitbucket.org/pypy/pypy/changeset/5903949b2f63/

Log:	Move check for operation result down to compute correct longevities
	even in case of ignored operation results

diff --git a/pypy/jit/backend/llsupport/regalloc.py b/pypy/jit/backend/llsupport/regalloc.py
--- a/pypy/jit/backend/llsupport/regalloc.py
+++ b/pypy/jit/backend/llsupport/regalloc.py
@@ -357,11 +357,6 @@
     last_used = {}
     for i in range(len(operations)-1, -1, -1):
         op = operations[i]
-        if op.result:
-            if op.result not in last_used and op.has_no_side_effect():
-                continue
-            assert op.result not in produced
-            produced[op.result] = i
         for j in range(op.numargs()):
             arg = op.getarg(j)
             if isinstance(arg, Box) and arg not in last_used:
@@ -373,6 +368,11 @@
                 assert isinstance(arg, Box)
                 if arg not in last_used:
                     last_used[arg] = i
+        if op.result:
+            if op.result not in last_used and op.has_no_side_effect():
+                continue
+            assert op.result not in produced
+            produced[op.result] = i
 
     longevity = {}
     for arg in produced: