/* Calculate branch probabilities, and basic block execution counts.
Copyright (C) 1990, 1991, 1992, 1993, 1994, 1996, 1997, 1998, 1999,
- 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008
+ Free Software Foundation, Inc.
Contributed by James E. Wilson, UC Berkeley/Cygnus Support;
based on some ideas from Dain Samples of UC Berkeley.
Further mangling by Bob Manson, Cygnus Support.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
for more details.
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. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
/* Generate basic block profile instrumentation and auxiliary files.
Profile generation is optimized, so that not all arcs in the basic
#include "tree.h"
#include "cfghooks.h"
#include "tree-flow.h"
+#include "timevar.h"
+#include "cfgloop.h"
+#include "tree-pass.h"
/* Hooks for profiling. */
static struct profile_hooks* profile_hooks;
-/* File for profiling debug output. */
-static inline FILE*
-profile_dump_file (void) {
- return profile_hooks->profile_dump_file ();
-}
-
/* Additional information about the edges we need. */
struct edge_info {
unsigned int count_valid : 1;
t = GCOV_COUNTER_V_DELTA;
break;
+ case HIST_TYPE_INDIR_CALL:
+ t = GCOV_COUNTER_V_INDIR;
+ break;
+
+ case HIST_TYPE_AVERAGE:
+ t = GCOV_COUNTER_AVERAGE;
+ break;
+
+ case HIST_TYPE_IOR:
+ t = GCOV_COUNTER_IOR;
+ break;
+
default:
gcc_unreachable ();
}
(profile_hooks->gen_const_delta_profiler) (hist, t, 0);
break;
+ case HIST_TYPE_INDIR_CALL:
+ (profile_hooks->gen_ic_profiler) (hist, t, 0);
+ break;
+
+ case HIST_TYPE_AVERAGE:
+ (profile_hooks->gen_average_profiler) (hist, t, 0);
+ break;
+
+ case HIST_TYPE_IOR:
+ (profile_hooks->gen_ior_profiler) (hist, t, 0);
+ break;
+
default:
gcc_unreachable ();
}
}
- VEC_free (histogram_value, heap, values);
}
\f
}
}
if (dump_file)
- dump_flow_info (dump_file);
+ dump_flow_info (dump_file, dump_flags);
total_num_passes += passes;
if (dump_file)
{
edge e;
edge_iterator ei;
- rtx note;
if (bb->count < 0)
{
{
FOR_EACH_EDGE (e, ei, bb->succs)
e->probability = (e->count * REG_BR_PROB_BASE + bb->count / 2) / bb->count;
- if (bb->index >= 0
+ if (bb->index >= NUM_FIXED_BLOCKS
&& block_ends_with_condjump_p (bb)
&& EDGE_COUNT (bb->succs) >= 2)
{
index = 19;
hist_br_prob[index]++;
- /* Do this for RTL only. */
- if (!ir_type ())
- {
- note = find_reg_note (BB_END (bb), REG_BR_PROB, 0);
- /* There may be already note put by some other pass, such
- as builtin_expect expander. */
- if (note)
- XEXP (note, 0) = GEN_INT (prob);
- else
- REG_NOTES (BB_END (bb))
- = gen_rtx_EXPR_LIST (REG_BR_PROB, GEN_INT (prob),
- REG_NOTES (BB_END (bb)));
- }
num_branches++;
}
}
- /* Otherwise try to preserve the existing REG_BR_PROB probabilities
- tree based profile guessing put into code. BB can be the
- ENTRY_BLOCK, and it can have multiple (fake) successors in
- EH cases, but it still has no code; don't crash in this case. */
- else if (profile_status == PROFILE_ABSENT
- && !ir_type ()
- && EDGE_COUNT (bb->succs) > 1
- && BB_END (bb)
- && (note = find_reg_note (BB_END (bb), REG_BR_PROB, 0)))
- {
- int prob = INTVAL (XEXP (note, 0));
-
- BRANCH_EDGE (bb)->probability = prob;
- FALLTHRU_EDGE (bb)->probability = REG_BR_PROB_BASE - prob;
- }
/* As a last resort, distribute the probabilities evenly.
Use simple heuristics that if there are normal edges,
give all abnormals frequency of 0, otherwise distribute the
FOR_EACH_EDGE (e, ei, bb->succs)
e->probability = REG_BR_PROB_BASE / total;
}
- if (bb->index >= 0
+ if (bb->index >= NUM_FIXED_BLOCKS
&& block_ends_with_condjump_p (bb)
&& EDGE_COUNT (bb->succs) >= 2)
num_branches++, num_never_executed;
gcov_type *histogram_counts[GCOV_N_VALUE_COUNTERS];
gcov_type *act_count[GCOV_N_VALUE_COUNTERS];
gcov_type *aact_count;
- histogram_value hist;
for (t = 0; t < GCOV_N_VALUE_COUNTERS; t++)
n_histogram_counters[t] = 0;
for (i = 0; i < VEC_length (histogram_value, values); i++)
{
- hist = VEC_index (histogram_value, values, i);
+ histogram_value hist = VEC_index (histogram_value, values, i);
n_histogram_counters[(int) hist->type] += hist->n_counters;
}
for (i = 0; i < VEC_length (histogram_value, values); i++)
{
- rtx hist_list = NULL_RTX;
+ histogram_value hist = VEC_index (histogram_value, values, i);
+ tree stmt = hist->hvalue.stmt;
- hist = VEC_index (histogram_value, values, i);
t = (int) hist->type;
aact_count = act_count[t];
act_count[t] += hist->n_counters;
- if (!ir_type ())
- {
- for (j = hist->n_counters; j > 0; j--)
- hist_list = alloc_EXPR_LIST (0, GEN_INT (aact_count[j - 1]),
- hist_list);
- hist_list = alloc_EXPR_LIST (0,
- copy_rtx (hist->hvalue.rtl.value), hist_list);
- hist_list = alloc_EXPR_LIST (0, GEN_INT (hist->type), hist_list);
- REG_NOTES (hist->hvalue.rtl.insn) =
- alloc_EXPR_LIST (REG_VALUE_PROFILE, hist_list,
- REG_NOTES (hist->hvalue.rtl.insn));
- }
- else
- {
- tree stmt = hist->hvalue.tree.stmt;
- stmt_ann_t ann = get_stmt_ann (stmt);
- hist->hvalue.tree.next = ann->histograms;
- ann->histograms = hist;
- hist->hvalue.tree.counters =
- xmalloc (sizeof (gcov_type) * hist->n_counters);
- for (j = 0; j < hist->n_counters; j++)
- hist->hvalue.tree.counters[j] = aact_count[j];
- }
+ gimple_add_histogram_value (cfun, stmt, hist);
+ hist->hvalue.counters = XNEWVEC (gcov_type, hist->n_counters);
+ for (j = 0; j < hist->n_counters; j++)
+ hist->hvalue.counters[j] = aact_count[j];
}
for (t = 0; t < GCOV_N_VALUE_COUNTERS; t++)
free (histogram_counts[t]);
}
-#define BB_TO_GCOV_INDEX(bb) ((bb)->index + 1)
+/* The entry basic block will be moved around so that it has index=1,
+ there is nothing at index 0 and the exit is at n_basic_block. */
+#define BB_TO_GCOV_INDEX(bb) ((bb)->index - 1)
/* When passed NULL as file_name, initialize.
When passed something else, output the necessary commands to change
line to LINE and offset to FILE_NAME. */
FOR_EACH_EDGE (e, ei, bb->succs)
{
+ block_stmt_iterator bsi;
+ tree last = NULL;
+
+ /* It may happen that there are compiler generated statements
+ without a locus at all. Go through the basic block from the
+ last to the first statement looking for a locus. */
+ for (bsi = bsi_last (bb); !bsi_end_p (bsi); bsi_prev (&bsi))
+ {
+ last = bsi_stmt (bsi);
+ if (EXPR_LOCUS (last))
+ break;
+ }
+
+ /* Edge with goto locus might get wrong coverage info unless
+ it is the only edge out of BB.
+ Don't do that when the locuses match, so
+ if (blah) goto something;
+ is not computed twice. */
+ if (last && EXPR_LOCUS (last)
+ && e->goto_locus
+ && !single_succ_p (bb)
+ && (LOCATION_FILE (e->goto_locus)
+ != LOCATION_FILE (EXPR_LOCATION (last))
+ || (LOCATION_LINE (e->goto_locus)
+ != LOCATION_LINE (EXPR_LOCATION (last)))))
+ {
+ basic_block new = split_edge (e);
+ single_succ_edge (new)->goto_locus = e->goto_locus;
+ }
if ((e->flags & (EDGE_ABNORMAL | EDGE_ABNORMAL_CALL))
&& e->dest != EXIT_BLOCK_PTR)
need_exit_edge = 1;
num_instrumented++;
}
- total_num_blocks += n_basic_blocks + 2;
+ total_num_blocks += n_basic_blocks;
if (dump_file)
fprintf (dump_file, "%d basic blocks\n", n_basic_blocks);
gcov_position_t offset;
offset = gcov_write_tag (GCOV_TAG_BLOCKS);
- for (i = 0; i != (unsigned) (n_basic_blocks + 2); i++)
+ for (i = 0; i != (unsigned) (n_basic_blocks); i++)
gcov_write_unsigned (0);
gcov_write_length (offset);
}
/* Keep all basic block indexes nonnegative in the gcov output.
Index 0 is used for entry block, last index is for exit block.
*/
- ENTRY_BLOCK_PTR->index = -1;
+ ENTRY_BLOCK_PTR->index = 1;
EXIT_BLOCK_PTR->index = last_basic_block;
/* Arcs */
flag_bits |= GCOV_ARC_FALLTHROUGH;
/* On trees we don't have fallthru flags, but we can
recompute them from CFG shape. */
- if (ir_type ()
- && e->flags & (EDGE_TRUE_VALUE | EDGE_FALSE_VALUE)
+ if (e->flags & (EDGE_TRUE_VALUE | EDGE_FALSE_VALUE)
&& e->src->next_bb == e->dest)
flag_bits |= GCOV_ARC_FALLTHROUGH;
/* Line numbers. */
if (coverage_begin_output ())
{
+ gcov_position_t offset;
+
/* Initialize the output. */
output_location (NULL, 0, NULL, NULL);
- if (!ir_type ())
+ FOR_EACH_BB (bb)
{
- gcov_position_t offset;
-
- FOR_EACH_BB (bb)
- {
- rtx insn = BB_HEAD (bb);
- int ignore_next_note = 0;
-
- offset = 0;
+ block_stmt_iterator bsi;
- /* We are looking for line number notes. Search backward
- before basic block to find correct ones. */
- insn = prev_nonnote_insn (insn);
- if (!insn)
- insn = get_insns ();
- else
- insn = NEXT_INSN (insn);
+ offset = 0;
- while (insn != BB_END (bb))
- {
- if (NOTE_P (insn))
- {
- /* Must ignore the line number notes that
- immediately follow the end of an inline function
- to avoid counting it twice. There is a note
- before the call, and one after the call. */
- if (NOTE_LINE_NUMBER (insn)
- == NOTE_INSN_REPEATED_LINE_NUMBER)
- ignore_next_note = 1;
- else if (NOTE_LINE_NUMBER (insn) <= 0)
- /*NOP*/;
- else if (ignore_next_note)
- ignore_next_note = 0;
- else
- {
- expanded_location s;
- NOTE_EXPANDED_LOCATION (s, insn);
- output_location (s.file, s.line, &offset, bb);
- }
- }
- insn = NEXT_INSN (insn);
- }
-
- if (offset)
- {
- /* A file of NULL indicates the end of run. */
- gcov_write_unsigned (0);
- gcov_write_string (NULL);
- gcov_write_length (offset);
- }
+ if (bb == ENTRY_BLOCK_PTR->next_bb)
+ {
+ expanded_location curr_location =
+ expand_location (DECL_SOURCE_LOCATION (current_function_decl));
+ output_location (curr_location.file, curr_location.line,
+ &offset, bb);
}
- }
- else
- {
- gcov_position_t offset;
- FOR_EACH_BB (bb)
+ for (bsi = bsi_start (bb); !bsi_end_p (bsi); bsi_next (&bsi))
{
- block_stmt_iterator bsi;
-
- offset = 0;
-
- if (bb == ENTRY_BLOCK_PTR->next_bb)
- {
- expanded_location curr_location =
- expand_location (DECL_SOURCE_LOCATION
- (current_function_decl));
- output_location (curr_location.file, curr_location.line,
- &offset, bb);
- }
-
- for (bsi = bsi_start (bb); !bsi_end_p (bsi); bsi_next (&bsi))
- {
- tree stmt = bsi_stmt (bsi);
- if (EXPR_HAS_LOCATION (stmt))
- output_location (EXPR_FILENAME (stmt),
- EXPR_LINENO (stmt),
- &offset, bb);
- }
+ tree stmt = bsi_stmt (bsi);
+ if (EXPR_HAS_LOCATION (stmt))
+ output_location (EXPR_FILENAME (stmt), EXPR_LINENO (stmt),
+ &offset, bb);
+ /* Take into account modify statements nested in return
+ produced by C++ NRV transformation. */
+ if (TREE_CODE (stmt) == RETURN_EXPR
+ && TREE_OPERAND (stmt, 0)
+ && TREE_CODE (TREE_OPERAND (stmt, 0)) == MODIFY_EXPR
+ && EXPR_HAS_LOCATION (TREE_OPERAND (stmt, 0)))
+ output_location (EXPR_FILENAME (TREE_OPERAND (stmt, 0)),
+ EXPR_LINENO (TREE_OPERAND (stmt, 0)),
+ &offset, bb);
+ }
- /* Notice GOTO expressions we eliminated while constructing the
- CFG. */
- if (single_succ_p (bb) && single_succ_edge (bb)->goto_locus)
- {
- /* ??? source_locus type is marked deprecated in input.h. */
- source_locus curr_location = single_succ_edge (bb)->goto_locus;
- /* ??? The FILE/LINE API is inconsistent for these cases. */
-#ifdef USE_MAPPED_LOCATION
- output_location (LOCATION_FILE (curr_location),
- LOCATION_LINE (curr_location),
- &offset, bb);
-#else
- output_location (curr_location->file, curr_location->line,
- &offset, bb);
-#endif
- }
+ /* Notice GOTO expressions we eliminated while constructing the
+ CFG. */
+ if (single_succ_p (bb) && single_succ_edge (bb)->goto_locus)
+ {
+ location_t curr_location = single_succ_edge (bb)->goto_locus;
+ /* ??? The FILE/LINE API is inconsistent for these cases. */
+ output_location (LOCATION_FILE (curr_location),
+ LOCATION_LINE (curr_location), &offset, bb);
+ }
- if (offset)
- {
- /* A file of NULL indicates the end of run. */
- gcov_write_unsigned (0);
- gcov_write_string (NULL);
- gcov_write_length (offset);
- }
+ if (offset)
+ {
+ /* A file of NULL indicates the end of run. */
+ gcov_write_unsigned (0);
+ gcov_write_string (NULL);
+ gcov_write_length (offset);
}
- }
+ }
}
ENTRY_BLOCK_PTR->index = ENTRY_BLOCK;
instrument_values (values);
/* Commit changes done by instrumentation. */
- if (ir_type ())
- bsi_commit_edge_inserts ();
- else
- {
- commit_edge_insertions_watch_calls ();
- allocate_reg_info (max_reg_num (), FALSE, FALSE);
- }
+ bsi_commit_edge_inserts ();
}
free_aux_for_edges ();
- if (!ir_type ())
- {
- /* Re-merge split basic blocks and the mess introduced by
- insert_insn_on_edge. */
- cleanup_cfg (profile_arc_flag ? CLEANUP_EXPENSIVE : 0);
- if (profile_dump_file())
- dump_flow_info (profile_dump_file());
- }
-
+ VEC_free (histogram_value, heap, values);
free_edge_list (el);
if (flag_branch_probabilities)
profile_status = PROFILE_READ;
void
tree_register_profile_hooks (void)
{
- gcc_assert (ir_type ());
+ gcc_assert (current_ir_type () == IR_GIMPLE);
profile_hooks = &tree_profile_hooks;
}
-/* Set up hooks to enable RTL-based profiling. */
-
-void
-rtl_register_profile_hooks (void)
-{
- gcc_assert (!ir_type ());
- profile_hooks = &rtl_profile_hooks;
-}