Support profile (BB counts and edge probabilities) in GIMPLE FE.

2019-05-09  Martin Liska  <mliska@suse.cz>

	* tree-cfg.c (dump_function_to_file): Dump entry BB count.
	* gimple-pretty-print.c (dump_gimple_bb_header):
	Dump BB count.
	(pp_cfg_jump): Dump edge probability.
	* profile-count.c (profile_quality_as_string): Simplify
	with a static array.
	(parse_profile_quality): New function.
	(profile_count::dump): Simplify with a static array.
	(profile_count::from_gcov_type): Add new argument.
	* profile-count.h (parse_profile_quality): Likewise.
	* predict.h (set_hot_bb_threshold): New.
	* params.def (PARAM_GIMPLE_FE_COMPUTED_HOT_BB_THRESHOLD):
	New param.
	* predict.c (get_hot_bb_threshold): Set from the new param.
	(set_hot_bb_threshold): New.
2019-05-09  Martin Liska  <mliska@suse.cz>

	* gimple-parser.c (struct gimple_parser): Add probability.
	for gimple_parser_edge.
	(gimple_parser::push_edge): Add new argument probability.
	(c_parser_gimple_parse_bb_spec): Parse also probability
	if present.
	(c_parser_parse_gimple_body): Set edge probability.
	(c_parser_gimple_compound_statement): Consume token
	before calling c_parser_gimple_goto_stmt.
	Parse BB counts.
	(c_parser_gimple_statement): Pass new argument.
	(c_parser_gimple_goto_stmt): Likewise.
	(c_parser_gimple_if_stmt): Likewise.
	(c_parser_gimple_or_rtl_pass_list): Parse hot_bb_threshold.
	* c-parser.c (c_parser_declaration_or_fndef): Pass
	hot_bb_threshold argument.
	* c-tree.h (struct c_declspecs): Add hot_bb_threshold
	field.
	(c_parser_gimple_parse_bb_spec_edge_probability): New.
2019-05-09  Martin Liska  <mliska@suse.cz>

	* gcc.dg/gimplefe-37.c: New test.
	* gcc.dg/gimplefe-33.c: Likewise.

From-SVN: r271034

1 files changed, 20 insertions, 2 deletions

diff --git a/gcc/profile-count.h b/gcc/profile-count.h
index d6de61f..2669f0d 100644
--- a/gcc/profile-count.h
+++ b/gcc/profile-count.h
@@ -60,6 +60,8 @@ enum profile_quality {
 };
 
 extern const char *profile_quality_as_string (enum profile_quality);
+extern bool parse_profile_quality (const char *value,
+				   profile_quality *quality);
 
 /* The base value for branch probability notes and edge probabilities.  */
 #define REG_BR_PROB_BASE  10000
@@ -149,6 +151,13 @@ class GTY((user)) profile_probability
 
   friend class profile_count;
 public:
+  profile_probability (): m_val (uninitialized_probability),
+    m_quality (profile_guessed)
+  {}
+
+  profile_probability (uint32_t val, profile_quality quality):
+    m_val (val), m_quality (quality)
+  {}
 
   /* Named probabilities.  */
   static profile_probability never ()
@@ -558,6 +567,12 @@ public:
       return initialized_p () && other.initialized_p () && m_val >= other.m_val;
     }
 
+  /* Get the value of the count.  */
+  uint32_t value () const { return m_val; }
+
+  /* Get the quality of the count.  */
+  enum profile_quality quality () const { return m_quality; }
+
   /* Output THIS to F.  */
   void dump (FILE *f) const;
 
@@ -675,7 +690,6 @@ private:
       return ipa_p () == other.ipa_p ();
     }
 public:
-
   /* Used for counters which are expected to be never executed.  */
   static profile_count zero ()
     {
@@ -737,6 +751,9 @@ public:
       return m_quality == profile_precise;
     }
 
+  /* Get the value of the count.  */
+  uint32_t value () const { return m_val; }
+
   /* Get the quality of the count.  */
   enum profile_quality quality () const { return m_quality; }
 
@@ -1136,7 +1153,8 @@ public:
   /* The profiling runtime uses gcov_type, which is usually 64bit integer.
      Conversions back and forth are used to read the coverage and get it
      into internal representation.  */
-  static profile_count from_gcov_type (gcov_type v);
+  static profile_count from_gcov_type (gcov_type v,
+				       profile_quality quality = profile_precise);
 
   /* LTO streaming support.  */
   static profile_count stream_in (struct lto_input_block *);