cdep: Remove unnecessary end block test.

The ipdom of each predecessor of the end block is the end block, so the subsequent loop does nothing.

diff --git a/ir/ana/cdep.c b/ir/ana/cdep.c
index d44e933..88824e5 100644 (file)
--- a/ir/ana/cdep.c
+++ b/ir/ana/cdep.c
@@ -99,13 +99,9 @@ static void add_cdep(ir_node *node, ir_node *dep_on)
  */
 static void cdep_pre(ir_node *node, void *ctx)
 {
-       ir_node *const end_block = (ir_node*)ctx;
-       int i;
+       (void)ctx;
 
-       /* Special case: The end block has no control dependency. */
-       if (node == end_block) return;
-
-       for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
+       for (int i = get_Block_n_cfgpreds(node); i-- != 0;) {
                ir_node *pred = get_Block_cfgpred_block(node, i);
                ir_node *pdom;
                ir_node *dependee;
@@ -159,7 +155,7 @@ void compute_cdep(ir_graph *irg)
        ir_node *const rem         = get_Block_ipostdom(start_block);
        set_Block_ipostdom(start_block, end_block);
 
-       irg_block_walk_graph(irg, cdep_pre, NULL, end_block);
+       irg_block_walk_graph(irg, cdep_pre, NULL, NULL);
 
        (void) cdep_edge_hook;