http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52272
Igor Zamyatin <izamyatin at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |izamyatin at gmail dot com
--- Comment #8 from Igor Zamyatin <izamyatin at gmail dot com> 2012-03-26
11:05:52 UTC ---
Sort of experimental patch
Index: tree-ssa-loop-ivopts.c
===================================================================
--- tree-ssa-loop-ivopts.c (revision 185039)
+++ tree-ssa-loop-ivopts.c (working copy)
@@ -4114,6 +4114,7 @@
else if (ratio == 1)
{
tree real_cbase = cbase;
+ int diff_cost, add_cost1;
/* Check to see if any adjustment is needed. */
if (cstepi == 0 && stmt_is_after_inc)
@@ -4133,7 +4134,10 @@
ubase, real_cbase,
&symbol_present, &var_present, &offset,
depends_on);
+ diff_cost = cost.cost;
cost.cost /= avg_loop_niter (data->current_loop);
+ if (diff_cost > (add_cost1 = add_cost(TYPE_MODE (ctype), data->speed)))
+ cost.cost += add_cost1;
}
else if (address_p
&& !POINTER_TYPE_P (ctype)
It was found during some side investigation regarding ivopts phase work.
Patch fixes the regression.
