[pypy-commit] pypy memop-simplify3: calculate index value (const scale, const offset) before emiting the load for ConstPtrs

[plan_rich]

Author: Richard Plangger <planrichi at gmail.com>
Branch: memop-simplify3
Changeset: r82623:6f7d32f89861
Date: 2016-03-01 08:32 +0100
http://bitbucket.org/pypy/pypy/changeset/6f7d32f89861/

Log:	calculate index value (const scale, const offset) before emiting the
	load for ConstPtrs

diff --git a/rpython/jit/backend/llsupport/gc.py b/rpython/jit/backend/llsupport/gc.py
--- a/rpython/jit/backend/llsupport/gc.py
+++ b/rpython/jit/backend/llsupport/gc.py
@@ -164,13 +164,11 @@
             array_index = moving_obj_tracker.get_array_index(v)
 
             size, offset, _ = unpack_arraydescr(moving_obj_tracker.ptr_array_descr)
-            scale = size
+            array_index = array_index * size + offset
             args = [moving_obj_tracker.const_ptr_gcref_array,
                     ConstInt(array_index),
-                    ConstInt(scale),
-                    ConstInt(offset),
                     ConstInt(size)]
-            load_op = ResOperation(rop.GC_LOAD_INDEXED_R, args)
+            load_op = ResOperation(rop.GC_LOAD_R, args)
             newops.append(load_op)
             op.setarg(arg_i, load_op)
         #