Remove the write-only attributes cg_backedge and in_cg from struct block_attr.

ir/ir/ircons.c

@@ -475,8 +475,6 @@ ir_node *new_rd_immBlock(dbg_info *dbgi, ir_graph *irg)
 	res->attr.block.dynamic_ins = true;
 	res->attr.block.irg.irg     = irg;
 	res->attr.block.backedge    = NULL;
-	res->attr.block.in_cg       = NULL;
-	res->attr.block.cg_backedge = NULL;
 	res->attr.block.extblk      = NULL;
 	res->attr.block.entity      = NULL;
 

ir/ir/irop.c

@@ -76,7 +76,6 @@ static void block_copy_attr(ir_graph *irg, const ir_node *old_node,
 	default_copy_attr(irg, old_node, new_node);
 	new_node->attr.block.irg.irg       = irg;
 	new_node->attr.block.phis          = NULL;
-	new_node->attr.block.cg_backedge   = NULL;
 	new_node->attr.block.backedge      = new_backedge_arr(irg->obst, get_irn_arity(new_node));
 	new_node->attr.block.block_visited = 0;
 	memset(&new_node->attr.block.dom, 0, sizeof(new_node->attr.block.dom));

ir/ir/irtypes.h

@@ -211,11 +211,7 @@ typedef struct block_attr {
 	                                 in different phases.  Eventually inline the whole
 	                                 datastructure. */
 	ir_dom_info pdom;           /**< Datastructure that holds information about post-dominators. */
-	ir_node ** in_cg;           /**< array with predecessors in
-	                             * interprocedural_view, if they differ
-	                             * from intraprocedural predecessors */
 	bitset_t *backedge;         /**< Bitfield n set to true if pred n is backedge.*/
-	bitset_t *cg_backedge;      /**< Bitfield n set to true if pred n is interprocedural backedge. */
 	ir_extblk *extblk;          /**< The extended basic block this block belongs to. */
 	ir_entity *entity;          /**< entitiy representing this block */
 	ir_node  *phis;             /**< The list of Phi nodes in this block. */