valueset: Remove the unused link field.

[libfirm] / ir / ir / irssacons.c

diff --git a/ir/ir/irssacons.c b/ir/ir/irssacons.c
index 9dd9e94..afe1819 100644 (file)
--- a/ir/ir/irssacons.c
+++ b/ir/ir/irssacons.c
@@ -21,7 +21,6 @@
  * @file
  * @brief   restarting SSA construction for values.
  * @author  Michael Beck
- * @version $Id$
  */
 #include "config.h"
 
@@ -30,43 +29,28 @@
 #include "irnode_t.h"
 #include "irgwalk.h"
 
+/** Note: start and finish must use the same kind of walker */
+static void (*ssa_cons_walker)(ir_graph *, irg_walk_func *, irg_walk_func *, void *)
+       = irg_block_walk_graph;
+
 /**
  * Post-walker: prepare the graph nodes for new SSA construction cycle by
  * allocation new arrays.
  */
-static void prepare_nodes(ir_node *irn, void *env)
+static void prepare_blocks(ir_node *block, void *env)
 {
+       ir_graph *const irg   = get_Block_irg(block);
+       unsigned  const n_loc = irg->n_loc;
        (void)env;
-
-       if (is_Block(irn)) {
-               unsigned        n_loc = current_ir_graph->n_loc;
-               struct obstack *obst  = current_ir_graph->obst;
-               /* reset mature flag */
-               irn->attr.block.is_matured = 0;
-               irn->attr.block.graph_arr  = NEW_ARR_D(ir_node *, obst, n_loc);
-               memset(irn->attr.block.graph_arr, 0, sizeof(ir_node*) * n_loc);
-               irn->attr.block.phis       = NULL;
-       }
+       /* reset mature flag */
+       set_Block_matured(block, 0);
+       block->attr.block.graph_arr = NEW_ARR_DZ(ir_node*, get_irg_obstack(irg), n_loc);
+       set_Block_phis(block, NULL);
 }
 
-/*
- * Restarts SSA construction on the given graph with n_loc
- * new values.
- *
- * @param irg    the graph on which the SSA construction is restarted
- * @param n_loc  number of new variables
- *
- * After this function is complete, the graph is in phase_building
- * again and set_value()/get_value() and mature_block() can be used
- * to construct new values.
- */
 void ssa_cons_start(ir_graph *irg, int n_loc)
 {
-       /* for now we support only phase_high graphs */
-       assert(irg->phase_state == phase_high);
-
-       /* reset the phase to phase building: some optimization might depend on it */
-       set_irg_phase_state(irg, phase_building);
+       add_irg_constraints(irg, IR_GRAPH_CONSTRAINT_CONSTRUCTION);
 
        irg_set_nloc(irg, n_loc);
 
@@ -75,7 +59,7 @@ void ssa_cons_start(ir_graph *irg, int n_loc)
         * seems worth to do this.  First, we have to check if they really exists and
         * then clear them.  We do not expect SSA construction is used often.
         */
-       irg_walk_graph(irg, NULL, prepare_nodes, NULL);
+       ssa_cons_walker(irg, NULL, prepare_blocks, NULL);
 }
 
 /**
@@ -85,16 +69,11 @@ static void finish_block(ir_node *block, void *env)
 {
        (void)env;
 
-       if (!get_Block_matured(block))
-               mature_immBlock(block);
+       mature_immBlock(block);
 }
 
-/*
- * Finalize the (restarted) SSA construction. Matures all blocks that are
- * not matured yet and reset the graph state to phase_high.
- */
 void ssa_cons_finish(ir_graph *irg)
 {
-       irg_block_walk_graph(irg, NULL, finish_block, NULL);
+       ssa_cons_walker(irg, NULL, finish_block, NULL);
        irg_finalize_cons(irg);
 }