/* The profile merging function for choosing the most common
difference between two consecutive evaluations of the value. It is
given an array COUNTERS of N_COUNTERS old counters and it reads the
same number of counters from the gcov file. The counters are split
into 4-tuples where the members of the tuple have meanings:
-- the last value of the measured entity
-- the stored candidate on the most common difference
-- counter
-- total number of evaluations of the value */
void
__gcov_merge_delta (gcov_type *counters, unsigned n_counters)
{
unsigned i, n_measures;
gcov_type value, counter, all;
gcc_assert (!(n_counters % 4));
n_measures = n_counters / 4;
for (i = 0; i < n_measures; i++, counters += 4)
{
/* last = */ gcov_read_counter ();
value = gcov_read_counter ();
counter = gcov_read_counter ();
all = gcov_read_counter ();
if (counters[1] == value)
counters[2] += counter;
else if (counter > counters[2])
{
counters[1] = value;
counters[2] = counter - counters[2];
}
else
counters[2] -= counter;
counters[3] += all;
}
}
/* The profile merging function for choosing the most common value.
It is given an array COUNTERS of N_COUNTERS old counters and it
reads the same number of counters from the gcov file. The counters
are split into 3-tuples where the members of the tuple have
meanings:
-- the stored candidate on the most common value of the measured entity
-- counter
-- total number of evaluations of the value */
void
__gcov_merge_single (gcov_type *counters, unsigned n_counters)
{
unsigned i, n_measures;
gcov_type value, counter, all;
gcc_assert (!(n_counters % 3));
n_measures = n_counters / 3;
for (i = 0; i < n_measures; i++, counters += 3)
{
value = gcov_read_counter ();
counter = gcov_read_counter ();
all = gcov_read_counter ();
if (counters[0] == value)
counters[1] += counter;
else if (counter > counters[1])
{
counters[0] = value;
counters[1] = counter - counters[1];
}
else
counters[1] -= counter;
counters[2] += all;
}
}
bool
autofdo_source_profile::read ()
{
if (gcov_read_unsigned () != GCOV_TAG_AFDO_FUNCTION)
{
inform (0, "Not expected TAG.");
return false;
}
/* Skip the length of the section. */
gcov_read_unsigned ();
/* Read in the function/callsite profile, and store it in local
data structure. */
unsigned function_num = gcov_read_unsigned ();
for (unsigned i = 0; i < function_num; i++)
{
function_instance::function_instance_stack stack;
function_instance *s = function_instance::read_function_instance (
&stack, gcov_read_counter ());
afdo_profile_info->sum_all += s->total_count ();
map_[s->name ()] = s;
}
return true;
}
function_instance *
function_instance::read_function_instance (function_instance_stack *stack,
gcov_type head_count)
{
unsigned name = gcov_read_unsigned ();
unsigned num_pos_counts = gcov_read_unsigned ();
unsigned num_callsites = gcov_read_unsigned ();
function_instance *s = new function_instance (name, head_count);
stack->safe_push (s);
for (unsigned i = 0; i < num_pos_counts; i++)
{
unsigned offset = gcov_read_unsigned () & 0xffff0000;
unsigned num_targets = gcov_read_unsigned ();
gcov_type count = gcov_read_counter ();
s->pos_counts[offset].count = count;
for (unsigned j = 0; j < stack->length (); j++)
(*stack)[j]->total_count_ += count;
for (unsigned j = 0; j < num_targets; j++)
{
/* Only indirect call target histogram is supported now. */
gcov_read_unsigned ();
gcov_type target_idx = gcov_read_counter ();
s->pos_counts[offset].targets[target_idx] = gcov_read_counter ();
}
}
for (unsigned i = 0; i < num_callsites; i++)
{
unsigned offset = gcov_read_unsigned ();
function_instance *callee_function_instance
= read_function_instance (stack, 0);
s->callsites[std::make_pair (offset, callee_function_instance->name ())]
= callee_function_instance;
}
stack->pop ();
return s;
}
static void
read_profile (void)
{
if (gcov_open (auto_profile_file, 1) == 0)
error ("Cannot open profile file %s.", auto_profile_file);
if (gcov_read_unsigned () != GCOV_DATA_MAGIC)
error ("AutoFDO profile magic number does not mathch.");
/* Skip the version number. */
unsigned version = gcov_read_unsigned ();
if (version != AUTO_PROFILE_VERSION)
error ("AutoFDO profile version %u does match %u.",
version, AUTO_PROFILE_VERSION);
/* Skip the empty integer. */
gcov_read_unsigned ();
/* string_table. */
afdo_string_table = new string_table ();
if (!afdo_string_table->read())
error ("Cannot read string table from %s.", auto_profile_file);
/* autofdo_source_profile. */
afdo_source_profile = autofdo_source_profile::create ();
if (afdo_source_profile == NULL)
error ("Cannot read function profile from %s.", auto_profile_file);
/* autofdo_module_profile. */
fake_read_autofdo_module_profile ();
/* Read in the working set. */
if (gcov_read_unsigned () != GCOV_TAG_AFDO_WORKING_SET)
error ("Cannot read working set from %s.", auto_profile_file);
/* Skip the length of the section. */
gcov_read_unsigned ();
gcov_working_set_t set[128];
for (unsigned i = 0; i < 128; i++)
{
set[i].num_counters = gcov_read_unsigned ();
set[i].min_counter = gcov_read_counter ();
}
add_working_set (set);
}
/* The profile merging function that just adds the counters. It is given
an array COUNTERS of N_COUNTERS old counters and it reads the same number
of counters from the gcov file. */
void
__gcov_merge_ior (gcov_type *counters, unsigned n_counters)
{
for (; n_counters; counters++, n_counters--)
*counters |= gcov_read_counter ();
}