The following patch should improve code size which degradation for arm
is reported on
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48455
Is it ok to commit? The patch was successfully bootstrapped on x86-64
and i686 with H.J.'s autotester options.
2011-04-13 Vladimir Makarov <vmaka...@redhat.com>
PR rtl-optimization/48455
* ira-costs.c (find_costs_and_classes): Use i_mem_cost instead of
`temp_costs->mem_cost'.
Index: ira-costs.c
===================================================================
--- ira-costs.c (revision 172376)
+++ ira-costs.c (working copy)
@@ -1646,44 +1646,44 @@
for (k = cost_classes_ptr->num - 1; k >= 0; k--)
{
add_cost = a_costs[k];
if (add_cost > 0 && INT_MAX - add_cost < i_costs[k])
i_costs[k] = INT_MAX;
else
i_costs[k] += add_cost;
}
add_cost = COSTS (costs, a_num)->mem_cost;
if (add_cost > 0 && INT_MAX - add_cost < i_mem_cost)
i_mem_cost = INT_MAX;
else
i_mem_cost += add_cost;
#ifdef FORBIDDEN_INC_DEC_CLASSES
if (in_inc_dec[a_num])
inc_dec_p = true;
#endif
}
}
if (equiv_savings < 0)
- temp_costs->mem_cost = -equiv_savings;
+ i_mem_cost = -equiv_savings;
else if (equiv_savings > 0)
{
- temp_costs->mem_cost = 0;
+ i_mem_cost = 0;
for (k = cost_classes_ptr->num - 1; k >= 0; k--)
i_costs[k] += equiv_savings;
}
best_cost = (1 << (HOST_BITS_PER_INT - 2)) - 1;
best = ALL_REGS;
alt_class = NO_REGS;
/* Find best common class for all allocnos with the same
regno. */
for (k = 0; k < cost_classes_ptr->num; k++)
{
rclass = cost_classes[k];
/* Ignore classes that are too small for this operand or
invalid for an operand that was auto-incremented. */
if (! contains_reg_of_mode[rclass][PSEUDO_REGNO_MODE (i)]
#ifdef FORBIDDEN_INC_DEC_CLASSES
|| (inc_dec_p && forbidden_inc_dec_class[rclass])
#endif
#ifdef CANNOT_CHANGE_MODE_CLASS
|| invalid_mode_change_p (i, (enum reg_class) rclass)
