/*
- * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
+ * Copyright (C) 1995-2011 University of Karlsruhe. All right reserved.
*
* This file is part of libFirm.
*
* @brief Compute and access out edges (also called def-use edges).
* @author Goetz Lindenmaier, Michael Beck
* @date 1.2002
- * @version $Id$
*/
#include "config.h"
#include "irgraph_t.h"
#include "irprog_t.h"
#include "irgwalk.h"
-#include "irtools.h"
+#include "util.h"
#include "irprintf.h"
#include "error.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 */
+#include "ircons.h"
/*--------------------------------------------------------------------*/
/** Accessing the out datastructures **/
return node->out != NULL;
}
-/* returns the number of successors of the node: */
int get_irn_n_outs(const ir_node *node)
{
assert(node && node->kind == k_ir_node);
#ifdef DEBUG_libfirm
- /* assert(node->out_valid); */
+ assert(node->out_valid);
#endif /* defined DEBUG_libfirm */
/* we misuse the first for the size info of the out array */
return node->out[0].pos;
}
-/* Access successor n */
ir_node *get_irn_out(const ir_node *def, int pos)
{
assert(pos >= 0 && pos < get_irn_n_outs(def));
#ifdef DEBUG_libfirm
- /* assert(def->out_valid); */
+ assert(def->out_valid);
#endif /* defined DEBUG_libfirm */
return def->out[pos+1].use;
}
-/* Access successor n */
ir_node *get_irn_out_ex(const ir_node *def, int pos, int *in_pos)
{
assert(pos >= 0 && pos < get_irn_n_outs(def));
#ifdef DEBUG_libfirm
- /* assert(def->out_valid); */
+ assert(def->out_valid);
#endif /* defined DEBUG_libfirm */
*in_pos = def->out[pos+1].pos;
return def->out[pos+1].use;
assert(def && use);
assert(pos >= 0 && pos < get_irn_n_outs(def));
#ifdef DEBUG_libfirm
- def->out_valid = 1; /* assume that this function is used correctly */
+ assert(def->out_valid);
#endif /* defined DEBUG_libfirm */
def->out[pos+1].use = use;
def->out[pos+1].pos = in_pos;
}
-/* Return the number of control flow successors, ignore keep-alives. */
int get_Block_n_cfg_outs(const ir_node *bl)
{
int i, n_cfg_outs = 0;
#endif /* defined DEBUG_libfirm */
for (i = 1; i <= bl->out[0].pos; ++i) {
ir_node *succ = bl->out[i].use;
- if (get_irn_mode(succ) == mode_X && !is_End(succ))
+ if (get_irn_mode(succ) == mode_X && !is_End(succ) && !is_Bad(succ))
n_cfg_outs += succ->out[0].pos;
}
return n_cfg_outs;
}
-/* Return the number of control flow successors, honor keep-alives. */
int get_Block_n_cfg_outs_ka(const ir_node *bl)
{
int i, n_cfg_outs = 0;
for (i = 1; i <= bl->out[0].pos; ++i) {
ir_node *succ = bl->out[i].use;
if (get_irn_mode(succ) == mode_X) {
-
+ if (is_Bad(succ))
+ continue;
if (is_End(succ)) {
/* ignore End if we are in the Endblock */
if (get_nodes_block(succ) == bl)
return n_cfg_outs;
}
-/* Access predecessor n, ignore keep-alives. */
ir_node *get_Block_cfg_out(const ir_node *bl, int pos)
{
int i;
#endif /* defined DEBUG_libfirm */
for (i = 1; i <= bl->out[0].pos; ++i) {
ir_node *succ = bl->out[i].use;
- if (get_irn_mode(succ) == mode_X && !is_End(succ)) {
+ if (get_irn_mode(succ) == mode_X && !is_End(succ) && !is_Bad(succ)) {
int n_outs = succ->out[0].pos;
if (pos < n_outs)
return succ->out[pos + 1].use;
return NULL;
}
-/* Access predecessor n, honor keep-alives. */
ir_node *get_Block_cfg_out_ka(const ir_node *bl, int pos)
{
int i, n_outs;
for (i = 1; i <= bl->out[0].pos; ++i) {
ir_node *succ = bl->out[i].use;
if (get_irn_mode(succ) == mode_X) {
+ if (is_Bad(succ))
+ continue;
if (is_End(succ)) {
ir_node *end_bl = get_nodes_block(succ);
if (end_bl == bl) {
void *env)
{
assert(node);
- if (get_irg_outs_state(current_ir_graph) != outs_none) {
- inc_irg_visited (current_ir_graph);
+ ir_graph *irg = get_irn_irg(node);
+ if (irg_has_properties(irg, IR_GRAPH_PROPERTY_CONSISTENT_OUTS)) {
+ inc_irg_visited (irg);
irg_out_walk_2(node, 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)
{
int start, i, res, irn_arity;
mark_irn_visited(n);
- n->out = INT_TO_PTR(1); /* Space for array size. */
+ n->out = (ir_def_use_edge*) INT_TO_PTR(1); /* Space for array size. */
start = is_Block(n) ? 0 : -1;
irn_arity = get_irn_arity(n);
res += _count_outs(skipped_pred);
/*count my Def-Use edges */
- skipped_pred->out = INT_TO_PTR(PTR_TO_INT(skipped_pred->out) + 1);
+ skipped_pred->out = (ir_def_use_edge*) INT_TO_PTR(PTR_TO_INT(skipped_pred->out) + 1);
}
return res;
}
/* Now handle anchored nodes. We need the out count of those
even if they are not visible. */
- for (i = anchor_last - 1; i >= 0; --i) {
+ for (i = anchor_last; i >= anchor_first; --i) {
n = get_irg_anchor(irg, i);
if (!irn_visited_else_mark(n)) {
- n->out = INT_TO_PTR(1);
+ n->out = (ir_def_use_edge*) INT_TO_PTR(1);
++res;
}
}
*/
static ir_def_use_edge *_set_out_edges(ir_node *use, ir_def_use_edge *free)
{
- int n_outs, start, i, irn_arity, pos;
+ int start, i, irn_arity, pos;
+ size_t n_outs;
mark_irn_visited(use);
static ir_def_use_edge *set_out_edges(ir_graph *irg, ir_def_use_edge *free)
{
ir_node *n;
- int i, n_outs;
+ int i;
inc_irg_visited(irg);
free = _set_out_edges(get_irg_end(irg), free);
/* handle anchored nodes */
- for (i = anchor_last - 1; i >= 0; --i) {
+ for (i = anchor_last; i >= anchor_first; --i) {
n = get_irg_anchor(irg, i);
if (!irn_visited_else_mark(n)) {
- n_outs = PTR_TO_INT(n->out);
+ size_t n_outs = PTR_TO_INT(n->out);
n->out = free;
#ifdef DEBUG_libfirm
n->out_valid = 1;
return free;
}
-/* compute the outs for a given graph */
void compute_irg_outs(ir_graph *irg)
{
ir_graph *rem = current_ir_graph;
/* Update graph state */
assert(get_irg_phase_state(current_ir_graph) != phase_building);
- if (current_ir_graph->outs_state != outs_none)
- free_irg_outs(current_ir_graph);
+ free_irg_outs(current_ir_graph);
/* This first iteration counts the overall number of out edges and the
number of out edges for each node. */
/* Check how much memory we have used */
assert (end == (irg->outs + n_out_edges));
- current_ir_graph->outs_state = outs_consistent;
+ add_irg_properties(irg, IR_GRAPH_PROPERTY_CONSISTENT_OUTS);
current_ir_graph = rem;
}
void assure_irg_outs(ir_graph *irg)
{
- if (get_irg_outs_state(irg) != outs_consistent)
+ if (! irg_has_properties(irg, IR_GRAPH_PROPERTY_CONSISTENT_OUTS))
compute_irg_outs(irg);
}
void compute_irp_outs(void)
{
- int i;
- for (i = get_irp_n_irgs() -1; i >= 0; --i)
+ size_t i, n;
+ for (i = 0, n = get_irp_n_irgs(); i < n; ++i)
compute_irg_outs(get_irp_irg(i));
}
void free_irp_outs(void)
{
- int i;
- for (i = get_irp_n_irgs() -1; i >= 0; --i)
+ size_t i, n;
+ for (i = 0, n = get_irp_n_irgs(); i < n; ++i)
free_irg_outs(get_irp_irg(i));
}
-
-/*------------------------------------------------------------*
- * 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... *
- *------------------------------------------------------------*/
-
-
-#ifdef INTERPROCEDURAL_VIEW
-/**
- * Inits the number of outedges for each node
- * before counting.
- */
-static void init_count(ir_node * node, void *env)
-{
- (void) env;
- node->out = (ir_node **) 1; /* 1 for the array size */
-}
-
-
-/**
- * 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, n_outs, i, start;
- ir_node *succ;
-
- arity = get_irn_arity(node);
- start = (is_Block(node)) ? 0 : -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_TO_PTR(PTR_TO_INT(succ->out) + 1);
- }
-}
-
-/*
- * Inits all nodes for setting the outedges
- * Returns the overall count of edges
- */
-int count_ip_outs(void)
-{
- int res = 0;
-
- cg_walk(init_count, node_arity_count, &res);
-
- return(res);
-}
-
-static 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 = PTR_TO_INT(node->out); /* We wrote the count here in count_ip_outs */
- dummy_count += n_outs;
- 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.
- 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, arity = get_irn_arity(node);
- ir_node *succ;
- int start = (!is_Block(node)) ? -1 : 0;
- (void) env;
-
- for (i = start; i < arity; ++i) {
- succ = get_irn_n(node, i);
- succ->out[get_irn_n_outs(succ)+1] = node;
- succ->out[0] = INT_TO_PTR(get_irn_n_outs(succ) + 1);
- }
-}
-
-
-/*
- * 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;
-
- assert(get_irp_ip_view_state() == ip_view_valid &&
- "Cannot construct outs for invalid ip view.");
-
- if (irp->outs_state != outs_none) {
- free_ip_outs();
- }
-
- global_count = n_out_edges = count_ip_outs();
- out_edges = XMALLOCNZ(ir_node*, n_out_edges);
- 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 = outs_none;
-}
-#endif
-
-
void free_irg_outs(ir_graph *irg)
{
/* current_ir_graph->outs_state = outs_none; */
- irg->outs_state = outs_none;
if (irg->outs) {
#ifdef DEBUG_libfirm
irg_walk_graph (irg, reset_outs, NULL, NULL);
#endif /* defined DEBUG_libfirm */
}
-
-static void check_out_edges(ir_node *irn, void *env)
-{
- int i, j, pos;
- int *pError = env;
- int error = *pError;
- int last = is_Block(irn) ? 0 : -1;
-
- /* check forward: every input must have an out edge */
- for (i = get_irn_arity(irn) - 1; i >= last; --i) {
- ir_node *pred = get_irn_n(irn, i);
-
- for (j = get_irn_n_outs(pred) - 1; j >= 0; --j) {
- ir_node *user = get_irn_out_ex(pred, j, &pos);
-
- if (user == irn && pos == i) {
- break;
- }
- }
- if (j < 0) {
- ir_fprintf(stderr, "Missing out edge from %+F input %d to %+F", irn, i, pred);
- ++error;
- }
- }
-
- /* checking backward */
- for (i = get_irn_n_outs(irn) - 1; i >= 0; --i) {
- ir_node *user = get_irn_out_ex(irn, i, &pos);
-
- if (get_irn_n(user, pos) != irn) {
- ir_fprintf(stderr, "Spurious out edge from %+F output %d to %+F", irn, i, user);
- ++error;
- }
- }
- *pError = error;
-}
-
-/* verify outs edges. */
-void verify_outs(ir_graph *irg)
-{
- int errors = 0;
- irg_walk_graph(irg, NULL, check_out_edges, &errors);
- if (errors > 0)
- panic("Out edges are corrupt");
-}
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