Improve the AM folding heuristics: Do not fold AM if at least one of the AM operands...

[libfirm] / ir / be / beraextern.c

diff --git a/ir/be/beraextern.c b/ir/be/beraextern.c
index 6f66ad0..9caded9 100644 (file)
--- a/ir/be/beraextern.c
+++ b/ir/be/beraextern.c
@@ -427,13 +427,18 @@ static void dump_affinities_walker(ir_node *irn, void *env) {
        /* should_be_equal constraints are affinites */
        for (pos = 0, max = get_irn_arity(irn); pos<max; ++pos) {
                req = arch_get_register_req(raenv->aenv, irn, pos);
-
                if (arch_register_req_is(req, should_be_same)) {
-                       ir_node *other = get_irn_n(skip_Proj(irn), req->other_same);
-                       if(arch_irn_is(raenv->aenv, other, ignore)) {
-                               vi2 = be_get_var_info(other);
+                       const int* i;
+                       for (i = req->other_same; i != ENDOF(req->other_same); ++i) {
+                               ir_node *other;
+
+                               if (*i == -1) break;
 
-                               fprintf(raenv->f, "(%d, %d, %d)\n",  vi1->var_nr, vi2->var_nr, get_affinity_weight(irn));
+                               other = get_irn_n(skip_Proj(irn), *i);
+                               if(arch_irn_is(raenv->aenv, other, ignore)) {
+                                       vi2 = be_get_var_info(other);
+                                       fprintf(raenv->f, "(%d, %d, %d)\n",  vi1->var_nr, vi2->var_nr, get_affinity_weight(irn));
+                               }
                        }
                }
        }