Add "-fsave-optimization-record"

This patch implements a -fsave-optimization-record option, which
leads to a JSON file being written out, recording the dump_* calls
made (via the optinfo infrastructure).

The patch includes a minimal version of the JSON patch I posted last
year, with just enough support needed for optimization records (I
removed all of the parser code, leaving just the code for building
in-memory JSON trees and writing them to a pretty_printer).

gcc/ChangeLog:
	* Makefile.in (OBJS): Add json.o and optinfo-emit-json.o.
	(CFLAGS-optinfo-emit-json.o): Define TARGET_NAME.
	* common.opt (fsave-optimization-record): New option.
	* coretypes.h (struct kv_pair): Move here from dumpfile.c.
	* doc/invoke.texi (-fsave-optimization-record): New option.
	* dumpfile.c: Include "optinfo-emit-json.h".
	(struct kv_pair): Move to coretypes.h.
	(optgroup_options): Make non-static.
	(dump_context::end_scope): Call
	optimization_records_maybe_pop_dump_scope.
	* dumpfile.h (optgroup_options): New decl.
	* json.cc: New file.
	* json.h: New file.
	* optinfo-emit-json.cc: New file.
	* optinfo-emit-json.h: New file.
	* optinfo.cc: Include "optinfo-emit-json.h".
	(optinfo::emit): Call optimization_records_maybe_record_optinfo.
	(optinfo_enabled_p): Check optimization_records_enabled_p.
	(optinfo_wants_inlining_info_p): Likewise.
	* optinfo.h: Update comment.
	* profile-count.c (profile_quality_as_string): New function.
	* profile-count.h (profile_quality_as_string): New decl.
	(profile_count::quality): New accessor.
	* selftest-run-tests.c (selftest::run_tests): Call json_cc_tests
	and optinfo_emit_json_cc_tests.
	* selftest.h (selftest::json_cc_tests): New decl.
	(selftest::optinfo_emit_json_cc_tests): New decl.
	* toplev.c: Include "optinfo-emit-json.h".
	(compile_file): Call optimization_records_finish.
	(do_compile): Call optimization_records_start.
	* tree-ssa-live.c: Include optinfo.h.
	(remove_unused_scope_block_p): Retain inlining information if
	optinfo_wants_inlining_info_p returns true.

From-SVN: r262905

1 files changed, 6 insertions, 5 deletions

diff --git a/gcc/optinfo.cc b/gcc/optinfo.cc
index 6f224bc..93de9d9 100644
--- a/gcc/optinfo.cc
+++ b/gcc/optinfo.cc
@@ -27,6 +27,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "gimple.h"
 
 #include "optinfo.h"
+#include "optinfo-emit-json.h"
 #include "dump-context.h"
 #include "pretty-print.h"
 #include "gimple-pretty-print.h"
@@ -85,7 +86,8 @@ optinfo::~optinfo ()
 void
 optinfo::emit ()
 {
-  /* currently this is a no-op.  */
+  /* -fsave-optimization-record.  */
+  optimization_records_maybe_record_optinfo (this);
 }
 
 /* Update the optinfo's kind based on DUMP_KIND.  */
@@ -221,9 +223,8 @@ optinfo::add_dec (const wide_int_ref &wi, signop sgn)
 
 bool optinfo_enabled_p ()
 {
-  /* Currently no destinations are implemented, just a hook for
-     selftests.  */
-  return dump_context::get ().forcibly_enable_optinfo_p ();
+  return (dump_context::get ().forcibly_enable_optinfo_p ()
+	  || optimization_records_enabled_p ());
 }
 
 /* Return true if any of the active optinfo destinations make use
@@ -232,5 +233,5 @@ bool optinfo_enabled_p ()
 
 bool optinfo_wants_inlining_info_p ()
 {
-  return false;
+  return optimization_records_enabled_p ();
 }