#include "irouts.h"
#include "irnode_t.h"
#include "irgraph_t.h" /* To access irg->outs field (which is private to this module)
- without public access routine */
-#include "irprog.h"
+ without public access routine */
+#include "irprog_t.h"
+#include "irgwalk.h"
/**********************************************************************/
/** Accessing the out datastructures **/
int i, n_cfg_outs = 0;
assert(bl && (get_irn_op(bl) == op_Block));
for (i = 0; i < (int)bl->out[0]; i++)
- if ((get_irn_mode(bl->out[i+1]) == mode_X) &&
- (get_irn_op(bl->out[i+1]) != op_End)) n_cfg_outs++;
+ if ((intern_get_irn_mode(bl->out[i+1]) == mode_X) &&
+ (intern_get_irn_op(bl->out[i+1]) != op_End)) n_cfg_outs++;
return n_cfg_outs;
}
int i, out_pos = 0;
assert(bl && (get_irn_op(bl) == op_Block));
for (i = 0; i < (int)bl->out[0]; i++)
- if ((get_irn_mode(bl->out[i+1]) == mode_X) &&
- (get_irn_op(bl->out[i+1]) != op_End)) {
+ if ((intern_get_irn_mode(bl->out[i+1]) == mode_X) &&
+ (intern_get_irn_op(bl->out[i+1]) != op_End)) {
if (out_pos == pos) {
- ir_node *cfop = bl->out[i+1];
- return cfop->out[0+1];
+ ir_node *cfop = bl->out[i+1];
+ return cfop->out[0+1];
} else {
- out_pos++;
+ out_pos++;
}
}
return NULL;
}
void irg_out_walk_2(ir_node *node, irg_walk_func *pre,
- irg_walk_func *post, void *env) {
+ irg_walk_func *post, void *env) {
int i;
ir_node *succ;
}
void irg_out_walk(ir_node *node,
- irg_walk_func *pre, irg_walk_func *post,
- void *env) {
+ irg_walk_func *pre, irg_walk_func *post,
+ void *env) {
assert(node);
if (get_irg_outs_state(current_ir_graph) != no_outs) {
inc_irg_visited (current_ir_graph);
}
void irg_out_block_walk2(ir_node *bl,
- irg_walk_func *pre, irg_walk_func *post,
- void *env) {
+ irg_walk_func *pre, irg_walk_func *post,
+ void *env) {
int i;
- assert(get_irn_opcode(bl) == iro_Block);
-
if(get_Block_block_visited(bl) < get_irg_block_visited(current_ir_graph)) {
set_Block_block_visited(bl, get_irg_block_visited(current_ir_graph));
for(i = 0; i < get_Block_n_cfg_outs(bl); i++) {
/* find the corresponding predecessor block. */
ir_node *pred = get_Block_cfg_out(bl, i);
- assert(get_irn_opcode(pred) == iro_Block);
/* recursion */
irg_out_block_walk2(pred, pre, post, env);
}
/* Walks only over Block nodes in the graph. Has it's own visited
flag, so that it can be interleaved with the other walker. */
void irg_out_block_walk(ir_node *node,
- irg_walk_func *pre, irg_walk_func *post,
- void *env) {
+ irg_walk_func *pre, irg_walk_func *post,
+ void *env) {
- assert((get_irn_op(node) == op_Block) || (get_irn_mode(node) == mode_X));
+ assert((get_irn_op(node) == op_Block) || (intern_get_irn_mode(node) == mode_X));
inc_irg_block_visited(current_ir_graph);
- if (get_irn_mode(node) == mode_X) node = node->out[1];
- assert(get_irn_opcode(node) == iro_Block);
+ if (intern_get_irn_mode(node) == mode_X) node = node->out[1];
irg_out_block_walk2(node, pre, post, env);
/** Then the large array is allocated. The second iteration chops **/
/** the large array into smaller parts, sets the out edges and **/
/** recounts the out edges. **/
+/** Removes Tuple nodes! **/
/**********************************************************************/
set_irn_visited(n, get_irg_visited(current_ir_graph));
n->out = (ir_node **) 1; /* Space for array size. */
- if ((get_irn_op(n) == op_Block)) start = 0; else start = -1;
- irn_arity = get_irn_arity(n);
+ if ((intern_get_irn_op(n) == op_Block)) start = 0; else start = -1;
+ irn_arity = intern_get_irn_arity(n);
res = irn_arity - start +1; /* --1 or --0; 1 for array size. */
for (i = start; i < irn_arity; i++) {
/* Optimize Tuples. They annoy if walking the cfg. */
- succ = skip_Tuple(get_irn_n(n, i));
+ succ = skip_Tuple(intern_get_irn_n(n, i));
set_irn_n(n, i, succ);
/* count outs for successors */
if (get_irn_visited(succ) < get_irg_visited(current_ir_graph))
edge. */
n->out[0] = (ir_node *)0;
- if (get_irn_op(n) == op_Block) start = 0; else start = -1;
- irn_arity = get_irn_arity(n);
+ if (intern_get_irn_op(n) == op_Block) start = 0; else start = -1;
+ irn_arity = intern_get_irn_arity(n);
for (i = start; i < irn_arity; i++) {
- succ = get_irn_n(n, i);
+ succ = intern_get_irn_n(n, i);
/* Recursion */
if (get_irn_visited(succ) < get_irg_visited(current_ir_graph))
free = set_out_edges(succ, free);
if (get_Block_n_cfg_outs(get_irg_start_block(irg))) {
startbl = get_irg_start_block(irg);
for (i = 0; i < get_irn_n_outs(startbl); i++)
- if (get_irn_mode(get_irn_out(startbl, i)) == mode_X)
- proj = get_irn_out(startbl, i);
+ if (intern_get_irn_mode(get_irn_out(startbl, i)) == mode_X)
+ proj = get_irn_out(startbl, i);
if (get_irn_out(proj, 0) == startbl) {
assert(get_irn_n_outs(proj) == 2);
set_irn_out(proj, 0, get_irn_out(proj, 1));
/* Update graph state */
assert(get_irg_phase_state(current_ir_graph) != phase_building);
+ if (current_ir_graph->outs_state != no_outs) free_outs(current_ir_graph);
current_ir_graph->outs_state = outs_consistent;
/* This first iteration counts the overall number of out edges and the
}
-void compute_ip_outs(ir_graph *irg) { /*irg_walk_func *pre, irg_walk_func *post, void *env) { */
- int i;
- ir_graph *rem = current_ir_graph;
- int rem_view = interprocedural_view;
- interprocedural_view = true;
- inc_max_irg_visited();
- /* Fix all irg_visited flags */
- for (i = 0; i < get_irp_n_irgs(); i++)
- set_irg_visited(get_irp_irg(i), get_max_irg_visited());
+/****************************************************************
+ ** This computes the outedges for in interprocedural graph. **
+ ** There is one quirk: **
+ ** The number of the outedges for each node is saved in **
+ ** the first member of the ir_node** array. Maybe we should **
+ ** change this to make it more portable... **
+ ****************************************************************/
- /* Walk starting at unreachable procedures. Only these
- * have End blocks visible in interprocedural view. */
- for (i = 0; i < get_irp_n_irgs(); i++) {
- ir_node *sb;
- current_ir_graph = get_irp_irg(i);
- sb = get_irg_start_block(current_ir_graph);
+/* ------------------------------------------
+ Inits the number of outedges for each node
+ before counting.
+ ------------------------------------------ */
- if ((get_Block_n_cfgpreds(sb) > 1) ||
- (get_nodes_block(get_Block_cfgpred(sb, 0)) != sb)) continue;
+static void init_count(ir_node * node, void * env)
+{
+ node->out = (ir_node **) 1; /* 1 for the array size */
+}
- compute_outs(current_ir_graph); /*cg_walk_2(get_irg_end(current_ir_graph), pre, post, env);*/
- }
- /* Check whether we walked all procedures: there could be procedures
- with cyclic calls but no call from the outside. */
- for (i = 0; i < get_irp_n_irgs(); i++) {
- ir_node *sb;
- current_ir_graph = get_irp_irg(i);
-
- /* Test start block: if inner procedure end and end block are not
- * visible and therefore not marked. */
- sb = get_irg_start_block(current_ir_graph);
- if (get_irn_visited(sb) < get_irg_visited(current_ir_graph)) {
- compute_outs(current_ir_graph); /*cg_walk_2(sb, pre, post, env); */
+/* -----------------------------------------------
+ Adjusts the out edge count for its predecessors
+ and adds the current arity to the overall count,
+ which is saved in "env"
+ ------------------------------------------------ */
+
+static void node_arity_count(ir_node * node, void * env)
+{
+ int *anz = (int *) env, arity, i, start;
+ ir_node *succ;
+
+ arity = 1 + intern_get_irn_arity(node)
+ + ((is_Block(node)) ? 0 : 1);
+ *anz += arity;
+
+ start = (is_Block(node)) ? 0 : -1;
+ for(i = start; i < intern_get_irn_arity(node); i++)
+ {
+ succ = intern_get_irn_n(node, i);
+ succ->out = (ir_node **)((int)succ->out + 1);
}
- }
+}
+
+
+/* ----------------------------------------
+ Inits all nodes for setting the outedges
+ Returns the overall count of edges
+ ---------------------------------------- */
- /* Walk all endless loops in inner procedures.
- * We recognize an inner procedure if the End node is not visited. */
- for (i = 0; i < get_irp_n_irgs(); i++) {
- ir_node *e;
- current_ir_graph = get_irp_irg(i);
- e = get_irg_end(current_ir_graph);
- if (get_irn_visited(e) < get_irg_visited(current_ir_graph)) {
- /* Don't visit the End node. */
- /* int j;
- for (j = 0; j < get_End_n_keepalives(e); j++)
- cg_walk_2(get_End_keepalive(e, j), pre, post, env);*/
- compute_outs(current_ir_graph);
+int count_ip_outs(void) {
+
+ int res = 0;
+
+ cg_walk(init_count, node_arity_count, &res);
+
+ return(res);
+}
+
+int dummy_count = 0, global_count; /* Only for debugging */
+
+/* ---------------------------------------------
+ For each node: Sets the pointer to array
+ in which the outedges are written later.
+ The current array start is transported in env
+ --------------------------------------------- */
+
+static void set_array_pointer(ir_node *node, void *env) {
+
+ int n_outs;
+ ir_node ***free = (ir_node ***) env;
+
+ /* Allocate my array */
+ n_outs = (int) node -> out; /* We wrote the count here in count_ip_outs */
+ dummy_count += n_outs;
+ assert(dummy_count <= global_count && "More outedges than initialliy counted!");
+ node -> out = *free;
+ *free = &((*free)[n_outs]);
+ /* We count the successors again, the space will be sufficient.
+ We use this counter to remember the position for the next back
+ edge. */
+ node -> out[0] = (ir_node *) 0;
+}
+
+
+/* -------------------------------------------
+ Adds an outedge from the predecessor to the
+ current node.
+ ------------------------------------------- */
+
+static void set_out_pointer(ir_node * node, void * env) {
+ int i;
+ ir_node *succ;
+ int start = (!is_Block(node)) ? -1 : 0;
+
+ for(i = start; i < intern_get_irn_arity(node); i++)
+ {
+ succ = intern_get_irn_n(node, i);
+ succ->out[get_irn_n_outs(succ)+1] = node;
+ succ->out[0] = (ir_node *) (get_irn_n_outs(succ) + 1);
}
- }
+}
- interprocedural_view = rem_view;
- current_ir_graph = rem;
+
+/* -------------------------------
+ Sets the outedges for all nodes.
+ -------------------------------- */
+
+void set_ip_outs(void)
+{
+ ir_node **outedge_array = get_irp_ip_outedges();
+ cg_walk(set_array_pointer, set_out_pointer, (void *) &outedge_array);
}
+/* --------------------------------------------------------
+ Counts the outedges, allocates memory to save the
+ outedges and fills this outedge array in interprocedural
+ view!
+ -------------------------------------------------------- */
+
+void compute_ip_outs(void) {
+
+ int n_out_edges;
+ ir_node **out_edges;
+
+ if (irp->outs_state != no_outs) free_ip_outs();
+
+ global_count = n_out_edges = count_ip_outs();
+ out_edges = (ir_node **) malloc (n_out_edges * sizeof(ir_node *));
+ set_irp_ip_outedges(out_edges);
+ set_ip_outs();
+}
+
+void free_ip_outs(void)
+{
+ ir_node **out_edges = get_irp_ip_outedges();
+ if (out_edges != NULL)
+ {
+ free(out_edges);
+ set_irp_ip_outedges(NULL);
+ }
+ irp->outs_state = no_outs;
+}
+
void free_outs(ir_graph *irg) {
- /* Update graph state */
- assert(get_irg_phase_state(current_ir_graph) != phase_building);
current_ir_graph->outs_state = no_outs;
if (irg->outs) free(irg->outs);
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