/* $Id$ */
#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
+#endif /* defined HAVE_CONFIG_H */
#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 "irgraph_t.h"
#include "irprog_t.h"
#include "irgwalk.h"
+#include "string.h"
+
+#ifdef DEBUG_libfirm
+/* Note: ir_node.out_valid and ir_graph.n_outs are only present when DEBUG_libfirm is defined */
+/* Accesses to out_valid and n_outs are fenced out to avoid breakage
+ when compiling with neither DEBUG_libfirm or NDEBUG defined */
+#endif /* defined DEBUG_libfirm */
/**********************************************************************/
/** Accessing the out datastructures **/
/**********************************************************************/
+static void reset_outs (ir_node *node, void *unused)
+{
+ node->out = NULL;
+#ifdef DEBUG_libfirm
+ node->out_valid = 0;
+#endif /* defined DEBUG_libfirm */
+}
+
/* returns the number of successors of the node: */
INLINE int get_irn_n_outs (ir_node *node) {
+#ifdef DEBUG_libfirm
+ /* assert (node->out_valid); */
+#endif /* defined DEBUG_libfirm */
return (int)(node->out[0]);
}
INLINE ir_node *get_irn_out (ir_node *node, int pos) {
assert(node);
assert(pos >= 0 && pos < get_irn_n_outs(node));
+#ifdef DEBUG_libfirm
+ /* assert (node->out_valid); */
+#endif /* defined DEBUG_libfirm */
return node->out[pos+1];
}
INLINE void set_irn_out (ir_node *node, int pos, ir_node *out) {
assert(node && out);
assert(pos >= 0 && pos < get_irn_n_outs(node));
+#ifdef DEBUG_libfirm
+ node->out_valid = 1; /* assume that this function is used correctly */
+#endif /* defined DEBUG_libfirm */
node->out[pos+1] = out;
}
INLINE int get_Block_n_cfg_outs (ir_node *bl) {
int i, n_cfg_outs = 0;
assert(bl && (get_irn_op(bl) == op_Block));
+#ifdef DEBUG_libfirm
+ assert (bl->out_valid);
+#endif /* defined DEBUG_libfirm */
for (i = 0; i < (int)bl->out[0]; i++)
- if ((intern_get_irn_mode(bl->out[i+1]) == mode_X) &&
- (intern_get_irn_op(bl->out[i+1]) != op_End)) n_cfg_outs++;
+ if ((get_irn_mode(bl->out[i+1]) == mode_X) &&
+ (get_irn_op(bl->out[i+1]) != op_End)) n_cfg_outs++;
return n_cfg_outs;
}
INLINE ir_node *get_Block_cfg_out (ir_node *bl, int pos) {
int i, out_pos = 0;
assert(bl && (get_irn_op(bl) == op_Block));
+#ifdef DEBUG_libfirm
+ assert (bl->out_valid);
+#endif /* defined DEBUG_libfirm */
for (i = 0; i < (int)bl->out[0]; i++)
- if ((intern_get_irn_mode(bl->out[i+1]) == mode_X) &&
- (intern_get_irn_op(bl->out[i+1]) != op_End)) {
+ if ((get_irn_mode(bl->out[i+1]) == mode_X) &&
+ (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];
} else {
- out_pos++;
+ out_pos++;
}
}
return NULL;
irg_walk_func *pre, irg_walk_func *post,
void *env) {
assert(node);
- if (get_irg_outs_state(current_ir_graph) != no_outs) {
+ if (get_irg_outs_state(current_ir_graph) != outs_none) {
inc_irg_visited (current_ir_graph);
irg_out_walk_2(node, pre, post, env);
}
irg_walk_func *pre, irg_walk_func *post,
void *env) {
- assert((get_irn_op(node) == op_Block) || (intern_get_irn_mode(node) == mode_X));
+ assert((get_irn_op(node) == op_Block) || (get_irn_mode(node) == mode_X));
inc_irg_block_visited(current_ir_graph);
- if (intern_get_irn_mode(node) == mode_X) node = node->out[1];
+ if (get_irn_mode(node) == mode_X) node = node->out[1];
irg_out_block_walk2(node, pre, post, env);
set_irn_visited(n, get_irg_visited(current_ir_graph));
n->out = (ir_node **) 1; /* Space for array size. */
- if ((intern_get_irn_op(n) == op_Block)) start = 0; else start = -1;
- irn_arity = intern_get_irn_arity(n);
+ start = get_irn_op(n) == op_Block ? 0 : -1;
+ irn_arity = 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(intern_get_irn_n(n, i));
+ succ = skip_Tuple(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))
+ if (get_irn_visited(succ) < get_irg_visited(current_ir_graph)) {
res += count_outs(succ);
+ }
/* Count my outs */
succ->out = (ir_node **)( (int)succ->out +1);
}
/* Allocate my array */
n_outs = (int) n->out;
n->out = free;
+#ifdef DEBUG_libfirm
+ n->out_valid = 1;
+#endif /* defined DEBUG_libfirm */
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. */
n->out[0] = (ir_node *)0;
- if (intern_get_irn_op(n) == op_Block) start = 0; else start = -1;
- irn_arity = intern_get_irn_arity(n);
+ if (get_irn_op(n) == op_Block) start = 0; else start = -1;
+ irn_arity = get_irn_arity(n);
for (i = start; i < irn_arity; i++) {
- succ = intern_get_irn_n(n, i);
+ succ = get_irn_n(n, i);
/* Recursion */
if (get_irn_visited(succ) < get_irg_visited(current_ir_graph))
free = set_out_edges(succ, free);
}
static INLINE void fix_start_proj(ir_graph *irg) {
- ir_node *proj = NULL, *startbl;
+ ir_node *proj = NULL;
+ ir_node *startbl = get_irg_start_block(irg);
int i;
- if (get_Block_n_cfg_outs(get_irg_start_block(irg))) {
- startbl = get_irg_start_block(irg);
+
+ if (get_Block_n_cfg_outs(startbl)) {
for (i = 0; i < get_irn_n_outs(startbl); i++)
- if (intern_get_irn_mode(get_irn_out(startbl, i)) == mode_X)
- proj = get_irn_out(startbl, i);
+ if (get_irn_mode(get_irn_out(startbl, i)) == mode_X) {
+ proj = get_irn_out(startbl, i);
+ break;
+ }
+
if (get_irn_out(proj, 0) == startbl) {
assert(get_irn_n_outs(proj) == 2);
set_irn_out(proj, 0, get_irn_out(proj, 1));
void compute_outs(ir_graph *irg) {
ir_graph *rem = current_ir_graph;
int n_out_edges = 0;
+ ir_node **end = NULL; /* Only for debugging */
current_ir_graph = irg;
/* 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);
+ if (current_ir_graph->outs_state != outs_none) free_outs(current_ir_graph);
current_ir_graph->outs_state = outs_consistent;
/* This first iteration counts the overall number of out edges and the
n_out_edges = count_outs(get_irg_end(irg));
/* allocate memory for all out edges. */
- irg->outs = (ir_node **) malloc (n_out_edges * sizeof(ir_node *));
+ irg->outs = (ir_node **) xmalloc (n_out_edges * sizeof(ir_node *));
+#ifdef DEBUG_libfirm
+ irg->n_outs = n_out_edges;
+#endif /* defined DEBUG_libfirm */
/* The second iteration splits the irg->outs array into smaller arrays
for each node and writes the back edges into this array. */
inc_irg_visited(irg);
- set_out_edges(get_irg_end(irg), irg->outs);
+ end = set_out_edges(get_irg_end(irg), irg->outs);
+
+#ifdef DEBUG_libfirm
+ /* Check how much memory we have used */
+ assert (end == (irg->outs + n_out_edges));
+#endif /* defined DEBUG_libfirm */
/* We want that the out of ProjX from Start contains the next block at
position 1, the Start block at position 2. This is necessary for
-/****************************************************************
- ** 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... **
- ****************************************************************/
+/*------------------------------------------------------------*
+ * 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... *
+ *------------------------------------------------------------*/
/* ------------------------------------------
static void node_arity_count(ir_node * node, void * env)
{
- int *anz = (int *) env, arity, i, start;
+ int *anz = (int *) env, arity, n_outs, i, start;
ir_node *succ;
- arity = 1 + intern_get_irn_arity(node)
- + ((is_Block(node)) ? 0 : 1);
- *anz += arity;
-
+ arity = get_irn_arity(node);
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);
- }
+
+ n_outs = 1 + arity + (-start); // ((is_Block(node)) ? 0 : 1); // Why + 1??
+ *anz += n_outs;
+
+ for(i = start; i < arity; i++) {
+ succ = get_irn_n(node, i);
+ succ->out = (ir_node **)((int)succ->out + 1);
+ }
}
/* 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!");
+ assert(dummy_count <= global_count && "More outedges than initially counted!");
node -> out = *free;
*free = &((*free)[n_outs]);
/* We count the successors again, the space will be sufficient.
------------------------------------------- */
static void set_out_pointer(ir_node * node, void * env) {
- int i;
+ int i, arity = get_irn_arity(node);
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);
- }
+ for(i = start; i < arity; i++) {
+ succ = 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);
+ }
}
ir_node **out_edges;
assert(get_irp_ip_view_state() == ip_view_valid &&
- "Cannot construct outs for invalid ip view.");
+ "Cannot construct outs for invalid ip view.");
- if (irp->outs_state != no_outs) free_ip_outs();
+ if (irp->outs_state != outs_none) {
+ free_ip_outs();
+ }
global_count = n_out_edges = count_ip_outs();
out_edges = (ir_node **) malloc (n_out_edges * sizeof(ir_node *));
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;
+ if (out_edges != NULL) {
+ free(out_edges);
+ set_irp_ip_outedges(NULL);
+ }
+ irp->outs_state = outs_none;
}
void free_outs(ir_graph *irg) {
- current_ir_graph->outs_state = no_outs;
+ /* current_ir_graph->outs_state = outs_none; */
+ irg->outs_state = outs_none;
+
+ if (irg->outs) {
+#ifdef DEBUG_libfirm
+ memset(irg->outs, 0, irg->n_outs);
+#endif /* defined DEBUG_libfirm */
+ free(irg->outs);
+ irg->outs = NULL;
+#ifdef DEBUG_libfirm
+ irg->n_outs = 0;
+#endif /* defined DEBUG_libfirm */
+ }
- if (irg->outs) free(irg->outs);
- irg->outs = NULL;
+#ifdef DEBUG_libfirm
+ /* when debugging, *always* reset all nodes' outs! irg->outs might
+ have been lying to us */
+ irg_walk_graph (irg, reset_outs, NULL, NULL);
+#endif /* defined DEBUG_libfirm */
}
projects / libfirm / blobdiff