/* Hooks for cfg representation specific functions.
- Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
Contributed by Sebastian Pop <s.pop@laposte.net>
This file is part of GCC.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
#include "config.h"
#include "system.h"
verify_flow_info (void)
{
size_t *edge_checksum;
- int num_bb_notes, err = 0;
+ int err = 0;
basic_block bb, last_bb_seen;
basic_block *last_visited;
timevar_push (TV_CFG_VERIFY);
- last_visited = xcalloc (last_basic_block + 2, sizeof (basic_block));
- edge_checksum = xcalloc (last_basic_block + 2, sizeof (size_t));
+ last_visited = XCNEWVEC (basic_block, last_basic_block);
+ edge_checksum = XCNEWVEC (size_t, last_basic_block);
/* Check bb chain & numbers. */
last_bb_seen = ENTRY_BLOCK_PTR;
{
int n_fallthru = 0;
edge e;
+ edge_iterator ei;
if (bb->count < 0)
{
bb->index, bb->frequency);
err = 1;
}
- for (e = bb->succ; e; e = e->succ_next)
+ FOR_EACH_EDGE (e, ei, bb->succs)
{
- if (last_visited [e->dest->index + 2] == bb)
+ if (last_visited [e->dest->index] == bb)
{
error ("verify_flow_info: Duplicate edge %i->%i",
e->src->index, e->dest->index);
err = 1;
}
- last_visited [e->dest->index + 2] = bb;
+ last_visited [e->dest->index] = bb;
if (e->flags & EDGE_FALLTHRU)
n_fallthru++;
err = 1;
}
- edge_checksum[e->dest->index + 2] += (size_t) e;
+ edge_checksum[e->dest->index] += (size_t) e;
}
if (n_fallthru > 1)
{
- error ("Wrong amount of branch edges after unconditional jump %i", bb->index);
+ error ("wrong amount of branch edges after unconditional jump %i", bb->index);
err = 1;
}
- for (e = bb->pred; e; e = e->pred_next)
+ FOR_EACH_EDGE (e, ei, bb->preds)
{
if (e->dest != bb)
{
fputc ('\n', stderr);
err = 1;
}
- edge_checksum[e->dest->index + 2] -= (size_t) e;
+
+ if (ei.index != e->dest_idx)
+ {
+ error ("basic block %d pred edge is corrupted", bb->index);
+ error ("its dest_idx should be %d, not %d",
+ ei.index, e->dest_idx);
+ fputs ("Predecessor: ", stderr);
+ dump_edge_info (stderr, e, 0);
+ fputs ("\nSuccessor: ", stderr);
+ dump_edge_info (stderr, e, 1);
+ fputc ('\n', stderr);
+ err = 1;
+ }
+
+ edge_checksum[e->dest->index] -= (size_t) e;
}
}
/* Complete edge checksumming for ENTRY and EXIT. */
{
edge e;
+ edge_iterator ei;
- for (e = ENTRY_BLOCK_PTR->succ; e ; e = e->succ_next)
- edge_checksum[e->dest->index + 2] += (size_t) e;
+ FOR_EACH_EDGE (e, ei, ENTRY_BLOCK_PTR->succs)
+ edge_checksum[e->dest->index] += (size_t) e;
- for (e = EXIT_BLOCK_PTR->pred; e ; e = e->pred_next)
- edge_checksum[e->dest->index + 2] -= (size_t) e;
+ FOR_EACH_EDGE (e, ei, EXIT_BLOCK_PTR->preds)
+ edge_checksum[e->dest->index] -= (size_t) e;
}
FOR_BB_BETWEEN (bb, ENTRY_BLOCK_PTR, NULL, next_bb)
- if (edge_checksum[bb->index + 2])
+ if (edge_checksum[bb->index])
{
error ("basic block %i edge lists are corrupted", bb->index);
err = 1;
}
- num_bb_notes = 0;
last_bb_seen = ENTRY_BLOCK_PTR;
/* Clean up. */
dump_bb (basic_block bb, FILE *outf, int indent)
{
edge e;
+ edge_iterator ei;
char *s_indent;
s_indent = alloca ((size_t) indent + 1);
putc ('\n', outf);
fprintf (outf, ";;%s pred: ", s_indent);
- for (e = bb->pred; e; e = e->pred_next)
+ FOR_EACH_EDGE (e, ei, bb->preds)
dump_edge_info (outf, e, 0);
putc ('\n', outf);
fprintf (outf, ";;%s succ: ", s_indent);
- for (e = bb->succ; e; e = e->succ_next)
+ FOR_EACH_EDGE (e, ei, bb->succs)
dump_edge_info (outf, e, 1);
putc ('\n', outf);
edge ret;
if (!cfg_hooks->redirect_edge_and_branch)
- internal_error ("%s does not support redirect_edge_and_branch.",
+ internal_error ("%s does not support redirect_edge_and_branch",
cfg_hooks->name);
ret = cfg_hooks->redirect_edge_and_branch (e, dest);
basic_block ret;
if (!cfg_hooks->redirect_edge_and_branch_force)
- internal_error ("%s does not support redirect_edge_and_branch_force.",
+ internal_error ("%s does not support redirect_edge_and_branch_force",
cfg_hooks->name);
ret = cfg_hooks->redirect_edge_and_branch_force (e, dest);
basic_block new_bb;
if (!cfg_hooks->split_block)
- internal_error ("%s does not support split_block.", cfg_hooks->name);
+ internal_error ("%s does not support split_block", cfg_hooks->name);
new_bb = cfg_hooks->split_block (bb, i);
if (!new_bb)
new_bb->frequency = bb->frequency;
new_bb->loop_depth = bb->loop_depth;
- if (dom_computed[CDI_DOMINATORS] >= DOM_CONS_OK)
+ if (dom_info_available_p (CDI_DOMINATORS))
{
redirect_immediate_dominators (CDI_DOMINATORS, bb, new_bb);
set_immediate_dominator (CDI_DOMINATORS, new_bb, bb);
bool ret;
if (!cfg_hooks->move_block_after)
- internal_error ("%s does not support move_block_after.", cfg_hooks->name);
+ internal_error ("%s does not support move_block_after", cfg_hooks->name);
ret = cfg_hooks->move_block_after (bb, after);
delete_basic_block (basic_block bb)
{
if (!cfg_hooks->delete_basic_block)
- internal_error ("%s does not support delete_basic_block.", cfg_hooks->name);
+ internal_error ("%s does not support delete_basic_block", cfg_hooks->name);
cfg_hooks->delete_basic_block (bb);
/* Remove the edges into and out of this block. Note that there may
indeed be edges in, if we are removing an unreachable loop. */
- while (bb->pred != NULL)
- remove_edge (bb->pred);
- while (bb->succ != NULL)
- remove_edge (bb->succ);
-
- bb->pred = NULL;
- bb->succ = NULL;
+ while (EDGE_COUNT (bb->preds) != 0)
+ remove_edge (EDGE_PRED (bb, 0));
+ while (EDGE_COUNT (bb->succs) != 0)
+ remove_edge (EDGE_SUCC (bb, 0));
if (dom_computed[CDI_DOMINATORS])
delete_from_dominance_info (CDI_DOMINATORS, bb);
gcov_type count = e->count;
int freq = EDGE_FREQUENCY (e);
edge f;
+ bool irr = (e->flags & EDGE_IRREDUCIBLE_LOOP) != 0;
if (!cfg_hooks->split_edge)
- internal_error ("%s does not support split_edge.", cfg_hooks->name);
+ internal_error ("%s does not support split_edge", cfg_hooks->name);
ret = cfg_hooks->split_edge (e);
ret->count = count;
ret->frequency = freq;
- ret->succ->probability = REG_BR_PROB_BASE;
- ret->succ->count = count;
+ single_succ_edge (ret)->probability = REG_BR_PROB_BASE;
+ single_succ_edge (ret)->count = count;
+
+ if (irr)
+ {
+ ret->flags |= BB_IRREDUCIBLE_LOOP;
+ single_pred_edge (ret)->flags |= EDGE_IRREDUCIBLE_LOOP;
+ single_succ_edge (ret)->flags |= EDGE_IRREDUCIBLE_LOOP;
+ }
if (dom_computed[CDI_DOMINATORS])
- set_immediate_dominator (CDI_DOMINATORS, ret, ret->pred->src);
+ set_immediate_dominator (CDI_DOMINATORS, ret, single_pred (ret));
if (dom_computed[CDI_DOMINATORS] >= DOM_NO_FAST_QUERY)
{
ret, provided that all other predecessors of e->dest are
dominated by e->dest. */
- if (get_immediate_dominator (CDI_DOMINATORS, ret->succ->dest)
- == ret->pred->src)
+ if (get_immediate_dominator (CDI_DOMINATORS, single_succ (ret))
+ == single_pred (ret))
{
- for (f = ret->succ->dest->pred; f; f = f->pred_next)
+ edge_iterator ei;
+ FOR_EACH_EDGE (f, ei, single_succ (ret)->preds)
{
- if (f == ret->succ)
+ if (f == single_succ_edge (ret))
continue;
if (!dominated_by_p (CDI_DOMINATORS, f->src,
- ret->succ->dest))
+ single_succ (ret)))
break;
}
if (!f)
- set_immediate_dominator (CDI_DOMINATORS, ret->succ->dest, ret);
+ set_immediate_dominator (CDI_DOMINATORS, single_succ (ret), ret);
}
};
basic_block ret;
if (!cfg_hooks->create_basic_block)
- internal_error ("%s does not support create_basic_block.", cfg_hooks->name);
+ internal_error ("%s does not support create_basic_block", cfg_hooks->name);
ret = cfg_hooks->create_basic_block (head, end, after);
bool ret;
if (!cfg_hooks->can_merge_blocks_p)
- internal_error ("%s does not support can_merge_blocks_p.", cfg_hooks->name);
+ internal_error ("%s does not support can_merge_blocks_p", cfg_hooks->name);
ret = cfg_hooks->can_merge_blocks_p (bb1, bb2);
predict_edge (edge e, enum br_predictor predictor, int probability)
{
if (!cfg_hooks->predict_edge)
- internal_error ("%s does not support predict_edge.", cfg_hooks->name);
+ internal_error ("%s does not support predict_edge", cfg_hooks->name);
cfg_hooks->predict_edge (e, predictor, probability);
}
predicted_by_p (basic_block bb, enum br_predictor predictor)
{
if (!cfg_hooks->predict_edge)
- internal_error ("%s does not support predicted_by_p.", cfg_hooks->name);
+ internal_error ("%s does not support predicted_by_p", cfg_hooks->name);
return cfg_hooks->predicted_by_p (bb, predictor);
}
merge_blocks (basic_block a, basic_block b)
{
edge e;
+ edge_iterator ei;
if (!cfg_hooks->merge_blocks)
- internal_error ("%s does not support merge_blocks.", cfg_hooks->name);
+ internal_error ("%s does not support merge_blocks", cfg_hooks->name);
cfg_hooks->merge_blocks (a, b);
partway though the merge of blocks for conditional_execution we'll
be merging a TEST block with THEN and ELSE successors. Free the
whole lot of them and hope the caller knows what they're doing. */
- while (a->succ)
- remove_edge (a->succ);
+
+ while (EDGE_COUNT (a->succs) != 0)
+ remove_edge (EDGE_SUCC (a, 0));
/* Adjust the edges out of B for the new owner. */
- for (e = b->succ; e; e = e->succ_next)
+ FOR_EACH_EDGE (e, ei, b->succs)
e->src = a;
- a->succ = b->succ;
+ a->succs = b->succs;
a->flags |= b->flags;
/* B hasn't quite yet ceased to exist. Attempt to prevent mishap. */
- b->pred = b->succ = NULL;
- a->global_live_at_end = b->global_live_at_end;
+ b->preds = b->succs = NULL;
if (dom_computed[CDI_DOMINATORS])
redirect_immediate_dominators (CDI_DOMINATORS, b, a);
make_forwarder_block (basic_block bb, bool (*redirect_edge_p) (edge),
void (*new_bb_cbk) (basic_block))
{
- edge e, next_e, fallthru;
+ edge e, fallthru;
+ edge_iterator ei;
basic_block dummy, jump;
if (!cfg_hooks->make_forwarder_block)
- internal_error ("%s does not support make_forwarder_block.",
+ internal_error ("%s does not support make_forwarder_block",
cfg_hooks->name);
fallthru = split_block_after_labels (bb);
bb = fallthru->dest;
/* Redirect back edges we want to keep. */
- for (e = dummy->pred; e; e = next_e)
+ for (ei = ei_start (dummy->preds); (e = ei_safe_edge (ei)); )
{
- next_e = e->pred_next;
if (redirect_edge_p (e))
- continue;
+ {
+ ei_next (&ei);
+ continue;
+ }
dummy->frequency -= EDGE_FREQUENCY (e);
dummy->count -= e->count;
new_bb_cbk (jump);
}
- if (dom_computed[CDI_DOMINATORS] >= DOM_CONS_OK)
+ if (dom_info_available_p (CDI_DOMINATORS))
{
basic_block doms_to_fix[2];
merge the flags for the duplicate edges. So we do not want to
check that the edge is not a FALLTHRU edge. */
- if ((s = b->succ) != NULL
- && ! (s->flags & EDGE_COMPLEX)
- && s->succ_next == NULL
- && s->dest == c
- && !find_reg_note (BB_END (b), REG_CROSSING_JUMP, NULL_RTX))
- tidy_fallthru_edge (s);
+ if (single_succ_p (b))
+ {
+ s = single_succ_edge (b);
+ if (! (s->flags & EDGE_COMPLEX)
+ && s->dest == c
+ && !find_reg_note (BB_END (b), REG_CROSSING_JUMP, NULL_RTX))
+ tidy_fallthru_edge (s);
+ }
}
}
edge e;
if (!cfg_hooks->can_duplicate_block_p)
- internal_error ("%s does not support can_duplicate_block_p.",
+ internal_error ("%s does not support can_duplicate_block_p",
cfg_hooks->name);
if (bb == EXIT_BLOCK_PTR || bb == ENTRY_BLOCK_PTR)
/* Duplicating fallthru block to exit would require adding a jump
and splitting the real last BB. */
- for (e = bb->succ; e; e = e->succ_next)
- if (e->dest == EXIT_BLOCK_PTR && e->flags & EDGE_FALLTHRU)
- return false;
+ e = find_edge (bb, EXIT_BLOCK_PTR);
+ if (e && (e->flags & EDGE_FALLTHRU))
+ return false;
return cfg_hooks->can_duplicate_block_p (bb);
}
/* Duplicates basic block BB and redirects edge E to it. Returns the
- new basic block. */
+ new basic block. The new basic block is placed after the basic block
+ AFTER. */
basic_block
-duplicate_block (basic_block bb, edge e)
+duplicate_block (basic_block bb, edge e, basic_block after)
{
edge s, n;
basic_block new_bb;
gcov_type new_count = e ? e->count : 0;
+ edge_iterator ei;
if (!cfg_hooks->duplicate_block)
- internal_error ("%s does not support duplicate_block.",
+ internal_error ("%s does not support duplicate_block",
cfg_hooks->name);
if (bb->count < new_count)
new_count = bb->count;
- if (!bb->pred)
- abort ();
+
#ifdef ENABLE_CHECKING
- if (!can_duplicate_block_p (bb))
- abort ();
+ gcc_assert (can_duplicate_block_p (bb));
#endif
new_bb = cfg_hooks->duplicate_block (bb);
+ if (after)
+ move_block_after (new_bb, after);
new_bb->loop_depth = bb->loop_depth;
new_bb->flags = bb->flags;
- for (s = bb->succ; s; s = s->succ_next)
+ FOR_EACH_EDGE (s, ei, bb->succs)
{
/* Since we are creating edges from a new block to successors
of another block (which therefore are known to be disjoint), there
new_bb->frequency = bb->frequency;
}
- new_bb->rbi->original = bb;
- bb->rbi->copy = new_bb;
+ set_bb_original (new_bb, bb);
+ set_bb_copy (bb, new_bb);
return new_bb;
}
return (cfg_hooks->flow_call_edges_add) (blocks);
}
+
+/* This function is called immediately after edge E is added to the
+ edge vector E->dest->preds. */
+
+void
+execute_on_growing_pred (edge e)
+{
+ if (cfg_hooks->execute_on_growing_pred)
+ cfg_hooks->execute_on_growing_pred (e);
+}
+
+/* This function is called immediately before edge E is removed from
+ the edge vector E->dest->preds. */
+
+void
+execute_on_shrinking_pred (edge e)
+{
+ if (cfg_hooks->execute_on_shrinking_pred)
+ cfg_hooks->execute_on_shrinking_pred (e);
+}
+
+/* This is used inside loop versioning when we want to insert
+ stmts/insns on the edges, which have a different behavior
+ in tree's and in RTL, so we made a CFG hook. */
+void
+lv_flush_pending_stmts (edge e)
+{
+ if (cfg_hooks->flush_pending_stmts)
+ cfg_hooks->flush_pending_stmts (e);
+}
+
+/* Loop versioning uses the duplicate_loop_to_header_edge to create
+ a new version of the loop basic-blocks, the parameters here are
+ exactly the same as in duplicate_loop_to_header_edge or
+ tree_duplicate_loop_to_header_edge; while in tree-ssa there is
+ additional work to maintain ssa information that's why there is
+ a need to call the tree_duplicate_loop_to_header_edge rather
+ than duplicate_loop_to_header_edge when we are in tree mode. */
+bool
+cfg_hook_duplicate_loop_to_header_edge (struct loop *loop, edge e,
+ struct loops *loops, unsigned int ndupl,
+ sbitmap wont_exit, edge orig,
+ edge *to_remove,
+ unsigned int *n_to_remove, int flags)
+{
+ gcc_assert (cfg_hooks->cfg_hook_duplicate_loop_to_header_edge);
+ return cfg_hooks->cfg_hook_duplicate_loop_to_header_edge (loop, e, loops,
+ ndupl, wont_exit,
+ orig, to_remove,
+ n_to_remove, flags);
+}
+
+/* Conditional jumps are represented differently in trees and RTL,
+ this hook takes a basic block that is known to have a cond jump
+ at its end and extracts the taken and not taken eges out of it
+ and store it in E1 and E2 respectively. */
+void
+extract_cond_bb_edges (basic_block b, edge *e1, edge *e2)
+{
+ gcc_assert (cfg_hooks->extract_cond_bb_edges);
+ cfg_hooks->extract_cond_bb_edges (b, e1, e2);
+}
+
+/* Responsible for updating the ssa info (PHI nodes) on the
+ new condition basic block that guards the versioned loop. */
+void
+lv_adjust_loop_header_phi (basic_block first, basic_block second,
+ basic_block new, edge e)
+{
+ if (cfg_hooks->lv_adjust_loop_header_phi)
+ cfg_hooks->lv_adjust_loop_header_phi (first, second, new, e);
+}
+
+/* Conditions in trees and RTL are different so we need
+ a different handling when we add the condition to the
+ versioning code. */
+void
+lv_add_condition_to_bb (basic_block first, basic_block second,
+ basic_block new, void *cond)
+{
+ gcc_assert (cfg_hooks->lv_add_condition_to_bb);
+ cfg_hooks->lv_add_condition_to_bb (first, second, new, cond);
+}
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