heights: fix usage of uninitialized memory

diff --git a/ir/ana/heights.c b/ir/ana/heights.c
index 2733c19..3e84239 100644 (file)
--- a/ir/ana/heights.c
+++ b/ir/ana/heights.c
@@ -62,8 +62,7 @@ static irn_height_t *get_height_data(ir_heights_t *heights, const ir_node *node)
 {
        irn_height_t *height = (irn_height_t*)ir_nodemap_get(&heights->data, node);
        if (height == NULL) {
-               height = obstack_alloc(&heights->obst, sizeof(*height));
-               memset(height, 0, sizeof(*height));
+               height = OALLOCZ(&heights->obst, irn_height_t);
                ir_nodemap_insert(&heights->data, node, height);
        }
        return height;
@@ -247,7 +246,7 @@ unsigned heights_recompute_block(ir_heights_t *h, ir_node *block)
 
 ir_heights_t *heights_new(ir_graph *irg)
 {
-       ir_heights_t *res = XMALLOC(ir_heights_t);
+       ir_heights_t *res = XMALLOCZ(ir_heights_t);
        ir_nodemap_init(&res->data, irg);
        obstack_init(&res->obst);
        res->dump_handle = dump_add_node_info_callback(height_dump_cb, res);