localopt: simple associativity optimisation

[libfirm] / ir / ir / ircons.c

diff --git a/ir/ir/ircons.c b/ir/ir/ircons.c
index b263e89..9b86858 100644 (file)
--- a/ir/ir/ircons.c
+++ b/ir/ir/ircons.c
@@ -295,7 +295,6 @@ static ir_node *get_r_value_internal(ir_node *block, int pos, ir_mode *mode)
                int arity = get_irn_arity(block);
                /* no predecessors: use unknown value */
                if (arity == 0 && block == get_irg_start_block(get_irn_irg(block))) {
-                       ir_graph *irg = get_irn_irg(block);
                        if (default_initialize_local_variable != NULL) {
                                ir_node *rem = get_r_cur_block(irg);
                                set_r_cur_block(irg, block);
@@ -507,7 +506,6 @@ ir_node *new_rd_immBlock(dbg_info *dbgi, ir_graph *irg)
        res->attr.block.in_cg       = NULL;
        res->attr.block.cg_backedge = NULL;
        res->attr.block.extblk      = NULL;
-       res->attr.block.region      = NULL;
        res->attr.block.entity      = NULL;
 
        set_Block_block_visited(res, 0);
@@ -780,6 +778,7 @@ ir_node *new_r_Anchor(ir_graph *irg)
 {
        ir_node *in[anchor_last];
        ir_node *res;
+       size_t   i;
        memset(in, 0, sizeof(in));
        res = new_ir_node(NULL, irg, NULL, op_Anchor, mode_ANY, anchor_last, in);
        res->attr.anchor.irg.irg = irg;
@@ -788,6 +787,11 @@ ir_node *new_r_Anchor(ir_graph *irg)
         * get_Block_irg for anchor */
        res->in[0] = res;
 
+       /* we can't have NULL inputs so reference ourselfes for now */
+       for (i = 0; i < (size_t)anchor_last; ++i) {
+               set_irn_n(res, i, res);
+       }
+
        return res;
 }