/*
- * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved.
+ * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
*
* This file is part of libFirm.
*
#include "irprog_t.h"
#include "irgwalk.h"
#include "irtools.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 */
}
#endif
+int get_irn_outs_computed(const ir_node *node)
+{
+ return node->out != NULL;
+}
+
/* returns the number of successors of the node: */
int get_irn_n_outs(ir_node *node) {
assert(node && node->kind == k_ir_node);
#ifdef DEBUG_libfirm
/* assert(node->out_valid); */
#endif /* defined DEBUG_libfirm */
- return PTR_TO_INT(node->out[0]);
+ /* 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(ir_node *node, int pos) {
- assert(pos >= 0 && pos < get_irn_n_outs(node));
+ir_node *get_irn_out(ir_node *def, int pos) {
+ assert(pos >= 0 && pos < get_irn_n_outs(def));
#ifdef DEBUG_libfirm
- /* assert(node->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(ir_node *def, int pos, int *in_pos) {
+ assert(pos >= 0 && pos < get_irn_n_outs(def));
+#ifdef DEBUG_libfirm
+ /* assert(def->out_valid); */
#endif /* defined DEBUG_libfirm */
-return node->out[pos+1];
+ *in_pos = def->out[pos+1].pos;
+ return def->out[pos+1].use;
}
-void set_irn_out(ir_node *node, int pos, ir_node *out) {
- assert(node && out);
- assert(pos >= 0 && pos < get_irn_n_outs(node));
+void set_irn_out(ir_node *def, int pos, ir_node *use, int in_pos) {
+ assert(def && use);
+ assert(pos >= 0 && pos < get_irn_n_outs(def));
#ifdef DEBUG_libfirm
- node->out_valid = 1; /* assume that this function is used correctly */
+ def->out_valid = 1; /* assume that this function is used correctly */
#endif /* defined DEBUG_libfirm */
- node->out[pos+1] = out;
+ def->out[pos+1].use = use;
+ def->out[pos+1].pos = in_pos;
}
/* Return the number of control flow successors, ignore keep-alives. */
#ifdef DEBUG_libfirm
assert(bl->out_valid);
#endif /* defined DEBUG_libfirm */
- for (i = 1; i <= PTR_TO_INT(bl->out[0]); ++i) {
- ir_node *succ = bl->out[i];
- if (get_irn_mode(succ) == mode_X && get_irn_op(succ) != op_End)
- n_cfg_outs += PTR_TO_INT(succ->out[0]);
+ 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))
+ n_cfg_outs += succ->out[0].pos;
}
return n_cfg_outs;
}
#ifdef DEBUG_libfirm
assert(bl->out_valid);
#endif /* defined DEBUG_libfirm */
- for (i = 1; i <= PTR_TO_INT(bl->out[0]); ++i) {
- ir_node *succ = bl->out[i];
+ for (i = 1; i <= bl->out[0].pos; ++i) {
+ ir_node *succ = bl->out[i].use;
if (get_irn_mode(succ) == mode_X) {
- if (get_irn_op(succ) == op_End) {
+ if (is_End(succ)) {
/* ignore End if we are in the Endblock */
- if (get_irn_n(succ, -1) == bl)
+ if (get_nodes_block(succ) == bl)
continue;
else /* count Keep-alive as one */
n_cfg_outs += 1;
} else
- n_cfg_outs += PTR_TO_INT(succ->out[0]);
+ n_cfg_outs += succ->out[0].pos;
}
}
return n_cfg_outs;
int i;
assert(bl && is_Block(bl));
#ifdef DEBUG_libfirm
- assert (bl->out_valid);
+ assert(bl->out_valid);
#endif /* defined DEBUG_libfirm */
- for (i = 1; i <= PTR_TO_INT(bl->out[0]); ++i) {
- ir_node *succ = bl->out[i];
- if (get_irn_mode(succ) == mode_X && get_irn_op(succ) != op_End) {
- int n_outs = PTR_TO_INT(succ->out[0]);
+ 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)) {
+ int n_outs = succ->out[0].pos;
if (pos < n_outs)
- return succ->out[pos + 1];
+ return succ->out[pos + 1].use;
else
pos -= n_outs;
}
#ifdef DEBUG_libfirm
assert (bl->out_valid);
#endif /* defined DEBUG_libfirm */
- for (i = 1; i <= PTR_TO_INT(bl->out[0]); ++i) {
- ir_node *succ = bl->out[i];
+ for (i = 1; i <= bl->out[0].pos; ++i) {
+ ir_node *succ = bl->out[i].use;
if (get_irn_mode(succ) == mode_X) {
- if (get_irn_op(succ) == op_End) {
- if (get_irn_n(succ, -1) == bl) {
+ if (is_End(succ)) {
+ ir_node *end_bl = get_nodes_block(succ);
+ if (end_bl == bl) {
/* ignore End if we are in the Endblock */
continue;
}
if (pos == 0) {
/* handle keep-alive here: return the Endblock instead of the End node */
- return get_irn_n(succ, -1);
+ return end_bl;
} else
--pos;
} else {
- n_outs = PTR_TO_INT(succ->out[0]);
+ n_outs = succ->out[0].pos;
if (pos < n_outs)
- return succ->out[pos + 1];
+ return succ->out[pos + 1].use;
else
pos -= n_outs;
}
}
if (post) post(node, env);
-
- return;
}
void irg_out_walk(ir_node *node,
inc_irg_visited (current_ir_graph);
irg_out_walk_2(node, pre, post, env);
}
- return;
}
static void irg_out_block_walk2(ir_node *bl,
void *env) {
int i, n;
- if (Block_not_block_visited(bl)) {
+ if (!Block_block_visited(bl)) {
mark_Block_block_visited(bl);
if (pre)
int start, i, res, irn_arity;
mark_irn_visited(n);
- n->out = (ir_node **) 1; /* Space for array size. */
+ n->out = INT_TO_PTR(1); /* Space for array size. */
start = is_Block(n) ? 0 : -1;
irn_arity = get_irn_arity(n);
for (i = start; i < irn_arity; ++i) {
/* Optimize Tuples. They annoy if walking the cfg. */
- ir_node *pred = skip_Tuple(get_irn_n(n, i));
- set_irn_n(n, i, pred);
+ ir_node *pred = get_irn_n(n, i);
+ ir_node *skipped_pred = skip_Tuple(pred);
- /* count outs for successors */
- if (irn_not_visited(pred))
- res += _count_outs(pred);
+ if (skipped_pred != pred) {
+ set_irn_n(n, i, skipped_pred);
+ }
- /* Count my outs */
- pred->out = (ir_node **)INT_TO_PTR(PTR_TO_INT(pred->out) + 1);
+ /* count Def-Use edges for predecessors */
+ if (irn_not_visited(skipped_pred))
+ res += _count_outs(skipped_pred);
+
+ /*count my Def-Use edges */
+ skipped_pred->out = INT_TO_PTR(PTR_TO_INT(skipped_pred->out) + 1);
}
return res;
}
*/
static int count_outs(ir_graph *irg) {
ir_node *n;
- int res;
+ int i, res;
inc_irg_visited(irg);
res = _count_outs(get_irg_end(irg));
- /* now handle special nodes */
- n = get_irg_frame(irg);
- if (irn_not_visited(n)) {
- n->out = (ir_node **)1;
- ++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) {
+ n = get_irg_anchor(irg, i);
+ if (irn_not_visited(n)) {
+ mark_irn_visited(n);
- n = get_irg_args(irg);
- if (irn_not_visited(n)) {
- n->out = (ir_node **)1;
- ++res;
+ n->out = INT_TO_PTR(1);
+ ++res;
+ }
}
-
return res;
}
/**
* Enter memory for the outs to a node.
*
- * @param n current node
+ * @param use current node
* @param free current free address in the chunk allocated for the outs
*
* @return The next free address
*/
-static ir_node **_set_out_edges(ir_node *n, ir_node **free) {
- int n_outs, start, i, irn_arity;
- ir_node *pred;
+static ir_def_use_edge *_set_out_edges(ir_node *use, ir_def_use_edge *free) {
+ int n_outs, start, i, irn_arity, pos;
- set_irn_visited(n, get_irg_visited(current_ir_graph));
+ mark_irn_visited(use);
/* Allocate my array */
- n_outs = PTR_TO_INT(n->out);
- n->out = free;
+ n_outs = PTR_TO_INT(use->out);
+ use->out = free;
#ifdef DEBUG_libfirm
- n->out_valid = 1;
+ use->out_valid = 1;
#endif /* defined DEBUG_libfirm */
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;
+ use->out[0].pos = 0;
- start = is_Block(n) ? 0 : -1;
- irn_arity = get_irn_arity(n);
+ start = is_Block(use) ? 0 : -1;
+ irn_arity = get_irn_arity(use);
for (i = start; i < irn_arity; ++i) {
- pred = get_irn_n(n, i);
+ ir_node *def = get_irn_n(use, i);
+
/* Recursion */
- if (get_irn_visited(pred) < get_irg_visited(current_ir_graph))
- free = _set_out_edges(pred, free);
- /* Remember our back edge */
- pred->out[get_irn_n_outs(pred)+1] = n;
- pred->out[0] = INT_TO_PTR(get_irn_n_outs(pred) + 1);
+ if (irn_not_visited(def))
+ free = _set_out_edges(def, free);
+
+ /* Remember this Def-Use edge */
+ pos = def->out[0].pos + 1;
+ def->out[pos].use = use;
+ def->out[pos].pos = i;
+
+ /* increase the number of Def-Use edges so far */
+ def->out[0].pos = pos;
}
return free;
}
*
* @return The next free address
*/
-static ir_node **set_out_edges(ir_graph *irg, ir_node **free) {
- ir_node *n, *special[2];
- int i, n_outs;
+static ir_def_use_edge *set_out_edges(ir_graph *irg, ir_def_use_edge *free) {
+ ir_node *n;
+ int i, n_outs;
inc_irg_visited(irg);
free = _set_out_edges(get_irg_end(irg), free);
- /* handle special nodes */
- special[0] = get_irg_frame(irg);
- special[1] = get_irg_args(irg);
+ /* handle anchored nodes */
+ for (i = anchor_last - 1; i >= 0; --i) {
+ n = get_irg_anchor(irg, i);
+ if (irn_not_visited(n)) {
+ mark_irn_visited(n);
- for (i = 1; i >= 0; --i) {
- n = special[i];
-
- if (get_irn_visited(n) < get_irg_visited(current_ir_graph)) {
n_outs = PTR_TO_INT(n->out);
n->out = free;
#ifdef 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
+ * position 0, the Start block at position 1. This is necessary for
* the out block walker.
*/
static INLINE void fix_start_proj(ir_graph *irg) {
- ir_node *proj = NULL;
ir_node *startbl = get_irg_start_block(irg);
- int i;
if (get_Block_n_cfg_outs(startbl)) {
- for (i = get_irn_n_outs(startbl) - 1; i >= 0; --i)
- if (get_irn_mode(get_irn_out(startbl, i)) == mode_X) {
- proj = get_irn_out(startbl, i);
- break;
+ ir_node *proj = get_irg_initial_exec(irg);
+ ir_node *irn;
+ int block_pos, other_pos;
+
+ if (get_irn_n_outs(proj) == 2) {
+ if (get_irn_out_ex(proj, 0, &block_pos) == startbl) {
+ irn = get_irn_out_ex(proj, 1, &other_pos);
+ set_irn_out(proj, 0, irn, other_pos);
+ set_irn_out(proj, 1, startbl, block_pos);
}
-
- if (get_irn_out(proj, 0) == startbl) {
- assert(get_irn_n_outs(proj) == 2);
- set_irn_out(proj, 0, get_irn_out(proj, 1));
- set_irn_out(proj, 1, startbl);
+ } else {
+ assert(get_irg_phase_state(irg) == phase_backend);
}
}
}
/* compute the outs for a given graph */
void compute_irg_outs(ir_graph *irg) {
- ir_graph *rem = current_ir_graph;
- int n_out_edges = 0;
- ir_node **end = NULL; /* Only for debugging */
+ ir_graph *rem = current_ir_graph;
+ int n_out_edges = 0;
+ ir_def_use_edge *end = NULL; /* Only for debugging */
current_ir_graph = irg;
assert (end == (irg->outs + n_out_edges));
/* 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
- the out block walker. */
+ position 0, the Start block at position 1. This is necessary for
+ code placement (place_early() ONLY if started GCSE on graphs with dead blocks) */
fix_start_proj(irg);
current_ir_graph->outs_state = outs_consistent;
*------------------------------------------------------------*/
+#ifdef INTERPROCEDURAL_VIEW
/**
* Inits the number of outedges for each node
* before counting.
}
}
-
/*
* Inits all nodes for setting the outedges
* Returns the overall count of edges
}
irp->outs_state = outs_none;
}
+#endif
void free_irg_outs(ir_graph *irg) {
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");
+}
projects / libfirm / blobdiff