free values again if we know we don't need them anymore

[r26343]

diff --git a/ir/be/benewalloc.c b/ir/be/benewalloc.c
index a43b4a7..6ac4d9f 100644 (file)
--- a/ir/be/benewalloc.c
+++ b/ir/be/benewalloc.c
@@ -607,7 +607,6 @@ static void permutate_values(ir_nodeset_t *live_nodes, ir_node *before,
 
                ins[old_reg] = value;
                ++n_used[old_reg];
-               //free_reg_of_value(value);
 
                /* free occupation infos, we'll add the values back later */
                if (live_nodes != NULL) {
@@ -647,9 +646,13 @@ static void permutate_values(ir_nodeset_t *live_nodes, ir_node *before,
 
                /* old register has 1 user less, permutation is resolved */
                assert(arch_register_get_index(arch_get_irn_register(src)) == old_r);
+               permutation[r] = r;
+
                assert(n_used[old_r] > 0);
                --n_used[old_r];
-               permutation[r] = r;
+               if (n_used[old_r] == 0) {
+                       free_reg_of_value(src);
+               }
 
                /* advance or jump back (if this copy enabled another copy) */
                if (old_r < r && n_used[old_r] == 0) {