diff options
Diffstat (limited to 'gcc-4.9/gcc/value-prof.c')
| -rw-r--r-- | gcc-4.9/gcc/value-prof.c | 28 |
1 files changed, 12 insertions, 16 deletions
diff --git a/gcc-4.9/gcc/value-prof.c b/gcc-4.9/gcc/value-prof.c index 62046de03..d74c112ee 100644 --- a/gcc-4.9/gcc/value-prof.c +++ b/gcc-4.9/gcc/value-prof.c @@ -137,6 +137,7 @@ static bool gimple_divmod_fixed_value_transform (gimple_stmt_iterator *); static bool gimple_mod_pow2_value_transform (gimple_stmt_iterator *); static bool gimple_mod_subtract_transform (gimple_stmt_iterator *); static bool gimple_stringops_transform (gimple_stmt_iterator *); +static bool gimple_ic_transform (gimple_stmt_iterator *); /* Allocate histogram value. */ @@ -696,20 +697,12 @@ check_ic_counter (gimple stmt, gcov_type *count1, gcov_type *count2, if (*count1 + *count2 > all) { - /* If (COUNT1 + COUNT2) is greater than ALL by less than around 10% then - just fix COUNT2 up so that (COUNT1 + COUNT2) equals ALL. */ - if ((*count1 + *count2 - all) < (all >> 3)) - *count2 = all - *count1; - else - { - if (dump_enabled_p ()) - dump_printf_loc (MSG_MISSED_OPTIMIZATION, locus, - "Corrupted topn ic value profile: top two " - "targets's total count (%ld) exceeds bb count " - "(%ld)", - (long)(*count1 + *count2), (long)all); - return true; - } + /* If (COUNT1 + COUNT2) is greater than ALL, we will fix it. This might + not necessarily be a corrupted profile. It may be caused by the sample + scaling. We will scale down both count1 and counte2. */ + double factor = (double) all / (*count1 + *count2); + *count1 *= factor; + *count2 *= factor; } return false; } @@ -1913,7 +1906,7 @@ gimple_ic_transform_mult_targ (gimple stmt, histogram_value histogram) /* Perform indirect call (STMT) to guarded direct function call transformation using value profile data. */ -bool +static bool gimple_ic_transform (gimple_stmt_iterator *gsi) { gimple stmt = gsi_stmt (*gsi); @@ -2355,7 +2348,10 @@ gimple_find_values_to_profile (histogram_values *values) for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) gimple_values_to_profile (gsi_stmt (gsi), values); - values->safe_push (gimple_alloc_histogram_value (cfun, HIST_TYPE_TIME_PROFILE, 0, 0)); + if (PARAM_VALUE (PARAM_PROFILE_VALUES_TIME)) + values->safe_push (gimple_alloc_histogram_value (cfun, + HIST_TYPE_TIME_PROFILE, + 0, 0)); FOR_EACH_VEC_ELT (*values, i, hist) { |