modulo-sched.c (get_sched_window): Use just one loop for predecessors and one loop for successors.
gcc/ * modulo-sched.c (get_sched_window): Use just one loop for predecessors and one loop for successors. Fix upper bound of memory range. From-SVN: r177555
This commit is contained in:
Richard Sandiford
Richard Sandiford
parent
d855a67e7d
commit
fe43febc8c
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@ -1,3 +1,8 @@
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2011-08-08 Richard Sandiford <richard.sandiford@linaro.org>
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* modulo-sched.c (get_sched_window): Use just one loop for predecessors
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and one loop for successors. Fix upper bound of memory range.
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2011-08-06 Uros Bizjak <ubizjak@gmail.com>
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PR target/50001
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@ -1630,9 +1630,11 @@ sms_schedule (void)
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static int
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get_sched_window (partial_schedule_ptr ps, ddg_node_ptr u_node,
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sbitmap sched_nodes, int ii, int *start_p, int *step_p, int *end_p)
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sbitmap sched_nodes, int ii, int *start_p, int *step_p,
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int *end_p)
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{
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int start, step, end;
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int early_start, late_start;
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ddg_edge_ptr e;
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sbitmap psp = sbitmap_alloc (ps->g->num_nodes);
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sbitmap pss = sbitmap_alloc (ps->g->num_nodes);
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@ -1640,6 +1642,8 @@ get_sched_window (partial_schedule_ptr ps, ddg_node_ptr u_node,
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sbitmap u_node_succs = NODE_SUCCESSORS (u_node);
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int psp_not_empty;
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int pss_not_empty;
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int count_preds;
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int count_succs;
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/* 1. compute sched window for u (start, end, step). */
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sbitmap_zero (psp);
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@ -1647,214 +1651,121 @@ get_sched_window (partial_schedule_ptr ps, ddg_node_ptr u_node,
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psp_not_empty = sbitmap_a_and_b_cg (psp, u_node_preds, sched_nodes);
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pss_not_empty = sbitmap_a_and_b_cg (pss, u_node_succs, sched_nodes);
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if (psp_not_empty && !pss_not_empty)
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{
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int early_start = INT_MIN;
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/* We first compute a forward range (start <= end), then decide whether
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to reverse it. */
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early_start = INT_MIN;
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late_start = INT_MAX;
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start = INT_MIN;
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end = INT_MAX;
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step = 1;
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end = INT_MAX;
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for (e = u_node->in; e != 0; e = e->next_in)
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{
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ddg_node_ptr v_node = e->src;
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count_preds = 0;
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count_succs = 0;
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if (dump_file)
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{
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fprintf (dump_file, "\nProcessing edge: ");
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print_ddg_edge (dump_file, e);
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/* Calculate early_start and limit end. Both bounds are inclusive. */
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if (psp_not_empty)
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for (e = u_node->in; e != 0; e = e->next_in)
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{
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ddg_node_ptr v_node = e->src;
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if (dump_file)
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{
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fprintf (dump_file, "\nProcessing edge: ");
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print_ddg_edge (dump_file, e);
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fprintf (dump_file,
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"\nScheduling %d (%d) in psp_not_empty,"
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" checking p %d (%d): ", u_node->cuid,
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INSN_UID (u_node->insn), v_node->cuid, INSN_UID
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(v_node->insn));
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}
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if (TEST_BIT (sched_nodes, v_node->cuid))
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{
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int p_st = SCHED_TIME (v_node);
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early_start = MAX (early_start,
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p_st + e->latency - (e->distance * ii));
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if (e->data_type == MEM_DEP)
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end = MIN (end, p_st + ii - 1);
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if (e->type == TRUE_DEP && e->data_type == REG_DEP)
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count_preds++;
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if (dump_file)
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fprintf (dump_file,
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"\nScheduling %d (%d) in psp_not_empty,"
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" checking p %d (%d): ", u_node->cuid,
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INSN_UID (u_node->insn), v_node->cuid, INSN_UID
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(v_node->insn));
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}
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"pred st = %d; early_start = %d; latency: %d;"
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" end: %d\n", p_st, early_start, e->latency, end);
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if (TEST_BIT (sched_nodes, v_node->cuid))
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{
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int p_st = SCHED_TIME (v_node);
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}
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else if (dump_file)
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fprintf (dump_file, "the node is not scheduled\n");
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}
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early_start =
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MAX (early_start, p_st + e->latency - (e->distance * ii));
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/* Calculate late_start and limit start. Both bounds are inclusive. */
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if (pss_not_empty)
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for (e = u_node->out; e != 0; e = e->next_out)
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{
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ddg_node_ptr v_node = e->dest;
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if (dump_file)
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fprintf (dump_file,
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"pred st = %d; early_start = %d; latency: %d",
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p_st, early_start, e->latency);
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if (dump_file)
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{
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fprintf (dump_file, "\nProcessing edge:");
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print_ddg_edge (dump_file, e);
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fprintf (dump_file,
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"\nScheduling %d (%d) in pss_not_empty,"
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" checking s %d (%d): ", u_node->cuid,
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INSN_UID (u_node->insn), v_node->cuid, INSN_UID
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(v_node->insn));
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}
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if (e->data_type == MEM_DEP)
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end = MIN (end, SCHED_TIME (v_node) + ii - 1);
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}
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else if (dump_file)
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fprintf (dump_file, "the node is not scheduled\n");
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}
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start = early_start;
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end = MIN (end, early_start + ii);
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/* Schedule the node close to it's predecessors. */
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step = 1;
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if (TEST_BIT (sched_nodes, v_node->cuid))
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{
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int s_st = SCHED_TIME (v_node);
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if (dump_file)
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fprintf (dump_file,
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"\nScheduling %d (%d) in a window (%d..%d) with step %d\n",
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u_node->cuid, INSN_UID (u_node->insn), start, end, step);
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}
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late_start = MIN (late_start,
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s_st - e->latency + (e->distance * ii));
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else if (!psp_not_empty && pss_not_empty)
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if (e->data_type == MEM_DEP)
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start = MAX (start, s_st - ii + 1);
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if (e->type == TRUE_DEP && e->data_type == REG_DEP)
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count_succs++;
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if (dump_file)
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fprintf (dump_file,
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"succ st = %d; late_start = %d; latency = %d;"
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" start=%d", s_st, late_start, e->latency, start);
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}
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else if (dump_file)
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fprintf (dump_file, "the node is not scheduled\n");
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}
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/* Get a target scheduling window no bigger than ii. */
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if (early_start == INT_MIN && late_start == INT_MAX)
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early_start = SCHED_ASAP (u_node);
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else if (early_start == INT_MIN)
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early_start = late_start - (ii - 1);
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late_start = MIN (late_start, early_start + (ii - 1));
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/* Apply memory dependence limits. */
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start = MAX (start, early_start);
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end = MIN (end, late_start);
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/* If there are at least as many successors as predecessors, schedule the
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node close to its successors. */
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if (pss_not_empty && count_succs >= count_preds)
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{
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int late_start = INT_MAX;
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end = INT_MIN;
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for (e = u_node->out; e != 0; e = e->next_out)
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{
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ddg_node_ptr v_node = e->dest;
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if (dump_file)
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{
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fprintf (dump_file, "\nProcessing edge:");
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print_ddg_edge (dump_file, e);
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fprintf (dump_file,
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"\nScheduling %d (%d) in pss_not_empty,"
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" checking s %d (%d): ", u_node->cuid,
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INSN_UID (u_node->insn), v_node->cuid, INSN_UID
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(v_node->insn));
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}
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if (TEST_BIT (sched_nodes, v_node->cuid))
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{
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int s_st = SCHED_TIME (v_node);
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late_start = MIN (late_start,
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s_st - e->latency + (e->distance * ii));
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if (dump_file)
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fprintf (dump_file,
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"succ st = %d; late_start = %d; latency = %d",
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s_st, late_start, e->latency);
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if (e->data_type == MEM_DEP)
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end = MAX (end, SCHED_TIME (v_node) - ii + 1);
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if (dump_file)
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fprintf (dump_file, "end = %d\n", end);
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}
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else if (dump_file)
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fprintf (dump_file, "the node is not scheduled\n");
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}
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start = late_start;
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end = MAX (end, late_start - ii);
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/* Schedule the node close to it's successors. */
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int tmp = end;
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end = start;
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start = tmp;
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step = -1;
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if (dump_file)
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fprintf (dump_file,
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"\nScheduling %d (%d) in a window (%d..%d) with step %d\n",
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u_node->cuid, INSN_UID (u_node->insn), start, end, step);
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}
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else if (psp_not_empty && pss_not_empty)
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{
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int early_start = INT_MIN;
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int late_start = INT_MAX;
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int count_preds = 0;
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int count_succs = 0;
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start = INT_MIN;
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end = INT_MAX;
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for (e = u_node->in; e != 0; e = e->next_in)
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{
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ddg_node_ptr v_node = e->src;
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if (dump_file)
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{
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fprintf (dump_file, "\nProcessing edge:");
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print_ddg_edge (dump_file, e);
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fprintf (dump_file,
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"\nScheduling %d (%d) in psp_pss_not_empty,"
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" checking p %d (%d): ", u_node->cuid, INSN_UID
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(u_node->insn), v_node->cuid, INSN_UID
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(v_node->insn));
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}
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if (TEST_BIT (sched_nodes, v_node->cuid))
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{
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int p_st = SCHED_TIME (v_node);
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early_start = MAX (early_start,
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p_st + e->latency
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- (e->distance * ii));
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if (dump_file)
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fprintf (dump_file,
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"pred st = %d; early_start = %d; latency = %d",
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p_st, early_start, e->latency);
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if (e->type == TRUE_DEP && e->data_type == REG_DEP)
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count_preds++;
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if (e->data_type == MEM_DEP)
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end = MIN (end, SCHED_TIME (v_node) + ii - 1);
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}
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else if (dump_file)
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fprintf (dump_file, "the node is not scheduled\n");
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}
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for (e = u_node->out; e != 0; e = e->next_out)
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{
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ddg_node_ptr v_node = e->dest;
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if (dump_file)
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{
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fprintf (dump_file, "\nProcessing edge:");
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print_ddg_edge (dump_file, e);
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fprintf (dump_file,
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"\nScheduling %d (%d) in psp_pss_not_empty,"
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" checking s %d (%d): ", u_node->cuid, INSN_UID
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(u_node->insn), v_node->cuid, INSN_UID
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(v_node->insn));
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}
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if (TEST_BIT (sched_nodes, v_node->cuid))
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{
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int s_st = SCHED_TIME (v_node);
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late_start = MIN (late_start,
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s_st - e->latency
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+ (e->distance * ii));
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if (dump_file)
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fprintf (dump_file,
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"succ st = %d; late_start = %d; latency = %d",
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s_st, late_start, e->latency);
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if (e->type == TRUE_DEP && e->data_type == REG_DEP)
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count_succs++;
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if (e->data_type == MEM_DEP)
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start = MAX (start, SCHED_TIME (v_node) - ii + 1);
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}
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else if (dump_file)
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fprintf (dump_file, "the node is not scheduled\n");
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}
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start = MAX (start, early_start);
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end = MIN (end, MIN (early_start + ii, late_start + 1));
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step = 1;
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/* If there are more successors than predecessors schedule the
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node close to it's successors. */
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if (count_succs >= count_preds)
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{
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int old_start = start;
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start = end - 1;
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end = old_start - 1;
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step = -1;
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}
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}
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else /* psp is empty && pss is empty. */
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{
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start = SCHED_ASAP (u_node);
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end = start + ii;
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step = 1;
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}
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/* Now that we've finalized the window, make END an exclusive rather
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than an inclusive bound. */
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end += step;
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*start_p = start;
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*step_p = step;
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@ -1867,10 +1778,10 @@ get_sched_window (partial_schedule_ptr ps, ddg_node_ptr u_node,
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if (dump_file)
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fprintf (dump_file, "\nEmpty window: start=%d, end=%d, step=%d\n",
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start, end, step);
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return -1;
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return -1;
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}
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return 0;
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return 0;
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}
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/* Calculate MUST_PRECEDE/MUST_FOLLOW bitmaps of U_NODE; which is the
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