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, 5 insertions, 0 deletions

diff --git a/gcc/profile-count.h b/gcc/profile-count.h
index c83fa3b..f4d0c34 100644
--- a/gcc/profile-count.h
+++ b/gcc/profile-count.h
@@ -59,6 +59,8 @@ enum profile_quality {
   profile_precise
 };
 
+extern const char *profile_quality_as_string (enum profile_quality);
+
 /* The base value for branch probability notes and edge probabilities.  */
 #define REG_BR_PROB_BASE  10000
 
@@ -721,6 +723,9 @@ public:
       return m_quality == profile_precise;
     }
 
+  /* Get the quality of the count.  */
+  enum profile_quality quality () const { return m_quality; }
+
   /* When merging basic blocks, the two different profile counts are unified.
      Return true if this can be done without losing info about profile.
      The only case we care about here is when first BB contains something