diff options
Diffstat (limited to 'gcc/profile.c')
| -rw-r--r-- | gcc/profile.c | 58 |
1 files changed, 57 insertions, 1 deletions
diff --git a/gcc/profile.c b/gcc/profile.c index dd23628c708..37a5ecb5c11 100644 --- a/gcc/profile.c +++ b/gcc/profile.c @@ -117,6 +117,7 @@ static rtx gen_const_delta_profiler (struct histogram_value *, unsigned, static unsigned instrument_edges (struct edge_list *); static void instrument_values (unsigned, struct histogram_value *); static void compute_branch_probabilities (void); +static void compute_value_histograms (unsigned, struct histogram_value *); static gcov_type * get_exec_counts (void); static basic_block find_group (basic_block); static void union_groups (basic_block, basic_block); @@ -601,6 +602,57 @@ compute_branch_probabilities (void) free_aux_for_blocks (); } +/* Load value histograms for N_VALUES values whose description is stored + in VALUES array from .da file. */ +static void +compute_value_histograms (unsigned n_values, struct histogram_value *values) +{ + unsigned i, j, t, any; + unsigned n_histogram_counters[GCOV_N_VALUE_COUNTERS]; + gcov_type *histogram_counts[GCOV_N_VALUE_COUNTERS]; + gcov_type *act_count[GCOV_N_VALUE_COUNTERS]; + gcov_type *aact_count; + + for (t = 0; t < GCOV_N_VALUE_COUNTERS; t++) + n_histogram_counters[t] = 0; + + for (i = 0; i < n_values; i++) + n_histogram_counters[(int) (values[i].type)] += values[i].n_counters; + + any = 0; + for (t = 0; t < GCOV_N_VALUE_COUNTERS; t++) + { + histogram_counts[t] = + get_coverage_counts (COUNTER_FOR_HIST_TYPE (t), + n_histogram_counters[t], &profile_info); + if (histogram_counts[t]) + any = 1; + act_count[t] = histogram_counts[t]; + } + if (!any) + return; + + for (i = 0; i < n_values; i++) + { + rtx hist_list = NULL_RTX; + t = (int) (values[i].type); + + aact_count = act_count[t]; + act_count[t] += values[i].n_counters; + for (j = values[i].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 (values[i].value), hist_list); + hist_list = alloc_EXPR_LIST (0, GEN_INT (values[i].type), hist_list); + REG_NOTES (values[i].insn) = + alloc_EXPR_LIST (REG_VALUE_PROFILE, hist_list, + REG_NOTES (values[i].insn)); + } + + for (t = 0; t < GCOV_N_VALUE_COUNTERS; t++) + if (histogram_counts[t]) + free (histogram_counts[t]); +} + /* Instrument and/or analyze program behavior based on program flow graph. In either case, this function builds a flow graph for the function being compiled. The flow graph is stored in BB_GRAPH. @@ -886,7 +938,11 @@ branch_prob (void) } if (flag_branch_probabilities) - compute_branch_probabilities (); + { + compute_branch_probabilities (); + if (flag_profile_values) + compute_value_histograms (n_values, values); + } /* For each edge not on the spanning tree, add counting code as rtl. */ if (profile_arc_flag |