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Print indirect call changes in afdo dump file

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Print some information about indirect call promotions in the afdo dump
file. Do it in the same format as the instrumented profiler so that
the test suite can match on it.

gcc/:

2016-07-13  Andi Kleen  <ak@linux.intel.com>

	* auto-profile.c (update_inlined_ind_target,
	afdo_indirect_call): Print information to dump file.

From-SVN: r238320
This commit is contained in:
Andi Kleen 2016-07-14 02:13:48 +00:00 committed by Andi Kleen
parent 9f01da8e20
commit 0ea221ef24
2 changed files with 68 additions and 7 deletions
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5
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
2016-07-13 Andi Kleen <ak@linux.intel.com>
* auto-profile.c (update_inlined_ind_target,
afdo_indirect_call): Print information to dump file.
2016-07-13 Andrew Burgess <andrew.burgess@embecosm.com>
* genrecog.c (special_predicate_operand_p): New function.

56
gcc/auto-profile.c
View File

@ -47,6 +47,8 @@ along with GCC; see the file COPYING3. If not see
#include "ipa-inline.h"
#include "tree-inline.h"
#include "auto-profile.h"
#include "tree-pretty-print.h"
#include "gimple-pretty-print.h"
/* The following routines implements AutoFDO optimization.
@ -747,8 +749,18 @@ bool
autofdo_source_profile::update_inlined_ind_target (gcall *stmt,
count_info *info)
{
if (dump_file)
{
fprintf (dump_file, "Checking indirect call -> direct call ");
print_gimple_stmt (dump_file, stmt, 0, TDF_SLIM);
}
if (LOCATION_LOCUS (gimple_location (stmt)) == cfun->function_end_locus)
{
if (dump_file)
fprintf (dump_file, " good locus\n");
return false;
}
count_info old_info;
get_count_info (stmt, &old_info);
@ -765,21 +777,41 @@ autofdo_source_profile::update_inlined_ind_target (gcall *stmt,
than half of the callsite count (stored in INFO), the original promoted
target is considered not hot any more. */
if (total >= info->count / 2)
{
if (dump_file)
fprintf (dump_file, " not hot anymore %ld >= %ld",
(long)total,
(long)info->count /2);
return false;
}
inline_stack stack;
get_inline_stack (gimple_location (stmt), &stack);
if (stack.length () == 0)
{
if (dump_file)
fprintf (dump_file, " no inline stack\n");
return false;
}
function_instance *s = get_function_instance_by_inline_stack (stack);
if (s == NULL)
{
if (dump_file)
fprintf (dump_file, " function not found in inline stack\n");
return false;
}
icall_target_map map;
if (s->find_icall_target_map (stmt, &map) == 0)
{
if (dump_file)
fprintf (dump_file, " no target map\n");
return false;
}
for (icall_target_map::const_iterator iter = map.begin ();
iter != map.end (); ++iter)
info->targets[iter->first] = iter->second;
if (dump_file)
fprintf (dump_file, " looks good\n");
return true;
}
@ -997,10 +1029,34 @@ afdo_indirect_call (gimple_stmt_iterator *gsi, const icall_target_map &map,
struct cgraph_node *direct_call = cgraph_node::get_for_asmname (
get_identifier ((const char *) hist->hvalue.counters[0]));
if (dump_file)
{
fprintf (dump_file, "Indirect call -> direct call ");
print_generic_expr (dump_file, callee, TDF_SLIM);
fprintf (dump_file, " => ");
print_generic_expr (dump_file, direct_call->decl, TDF_SLIM);
}
if (direct_call == NULL || !check_ic_target (stmt, direct_call))
{
if (dump_file)
fprintf (dump_file, " not transforming\n");
return;
}
if (DECL_STRUCT_FUNCTION (direct_call->decl) == NULL)
{
if (dump_file)
fprintf (dump_file, " no declaration\n");
return;
}
if (dump_file)
{
fprintf (dump_file, " transformation on insn ");
print_gimple_stmt (dump_file, stmt, 0, TDF_SLIM);
fprintf (dump_file, "\n");
}
struct cgraph_edge *new_edge
= indirect_edge->make_speculative (direct_call, 0, 0);
new_edge->redirect_call_stmt_to_callee ();