Use backtracking in find_original_value() for the flags emitter.

[libfirm] / ir / be / benode.c

diff --git a/ir/be/benode.c b/ir/be/benode.c
index f26ec00..dc215ac 100644 (file)
--- a/ir/be/benode.c
+++ b/ir/be/benode.c
@@ -439,17 +439,18 @@ ir_node *be_new_Perm(const arch_register_class_t *cls, ir_graph *irg, ir_node *b
 
 void be_Perm_reduce(ir_node *perm, int new_size, int *map)
 {
-       ir_graph *irg           = get_irn_irg(perm);
-       int            arity    = get_irn_arity(perm);
-       be_reg_data_t *old_data = alloca(arity * sizeof(old_data[0]));
-       be_node_attr_t *attr    = get_irn_attr(perm);
-       ir_node **new_in        = NEW_ARR_D(ir_node *, irg->obst, new_size);
+       int            arity     = get_irn_arity(perm);
+       be_reg_data_t  *old_data = alloca(arity * sizeof(old_data[0]));
+       be_node_attr_t *attr     = get_irn_attr(perm);
+       ir_node        **new_in;
 
        int i;
 
        assert(be_is_Perm(perm));
        assert(new_size <= arity);
 
+       NEW_ARR_A(ir_node *, new_in, new_size);
+
        /* save the old register data */
        memcpy(old_data, attr->reg_data, arity * sizeof(old_data[0]));