coverage.c (struct conts_entry): Add n_counts.

	* coverage.c (struct conts_entry): Add n_counts.
	(remap_counts_file): Record number of ocunts.
	(get_coverage_counts): Verify that counts match.
	* coverage.h (get_coverage_counts): Update prototype.
	* profile.c (get_exec_counts. compute_value_histograms): Add
	n_counts parametrs.

From-SVN: r267200

gcc/ChangeLog

+2018-12-15  Jan Hubicka  <hubicka@ucw.cz>
+
+	* coverage.c (struct conts_entry): Add n_counts.
+	(remap_counts_file): Record number of ocunts.
+	(get_coverage_counts): Verify that counts match.
+	* coverage.h (get_coverage_counts): Update prototype.
+	* profile.c (get_exec_counts. compute_value_histograms): Add
+	n_counts parametrs.
+
 2018-12-17  Senthil Kumar Selvaraj  <senthilkumar.selvaraj@microchip.com>
 
 	PR rtl-optimization/88253

gcc/coverage.c

@@ -74,6 +74,7 @@ struct counts_entry : pointer_hash <counts_entry>
   unsigned lineno_checksum;
   unsigned cfg_checksum;
   gcov_type *counts;
+  unsigned n_counts;
 
   /* hash_table support.  */
   static inline hashval_t hash (const counts_entry *);
@@ -260,6 +261,7 @@ read_counts_file (void)
 	      entry->lineno_checksum = lineno_checksum;
 	      entry->cfg_checksum = cfg_checksum;
 	      entry->counts = XCNEWVEC (gcov_type, n_counts);
+	      entry->n_counts = n_counts;
 	    }
 	  else if (entry->lineno_checksum != lineno_checksum
 		   || entry->cfg_checksum != cfg_checksum)
@@ -295,7 +297,7 @@ read_counts_file (void)
 
 gcov_type *
 get_coverage_counts (unsigned counter, unsigned cfg_checksum,
-		     unsigned lineno_checksum)
+		     unsigned lineno_checksum, unsigned int n_counts)
 {
   counts_entry *entry, elt;
 
@@ -344,17 +346,27 @@ get_coverage_counts (unsigned counter, unsigned cfg_checksum,
       return NULL;
     }
   
-  if (entry->cfg_checksum != cfg_checksum)
+  if (entry->cfg_checksum != cfg_checksum || entry->n_counts != n_counts)
     {
       static int warned = 0;
       bool warning_printed = false;
 
-      warning_printed =
-	warning_at (DECL_SOURCE_LOCATION (current_function_decl),
-		    OPT_Wcoverage_mismatch,
-		    "the control flow of function %qD does not match "
-		    "its profile data (counter %qs)", current_function_decl,
-		    ctr_names[counter]);
+      if (entry->n_counts != n_counts)
+	warning_printed =
+	  warning_at (DECL_SOURCE_LOCATION (current_function_decl),
+		      OPT_Wcoverage_mismatch,
+		      "number of counters in profile data for function %qD "
+		      "does not match "
+		      "its profile data (counter %qs, expected %i and have %i)",
+		      current_function_decl,
+		      ctr_names[counter], entry->n_counts, n_counts);
+      else
+	warning_printed =
+	  warning_at (DECL_SOURCE_LOCATION (current_function_decl),
+		      OPT_Wcoverage_mismatch,
+		      "the control flow of function %qD does not match "
+		      "its profile data (counter %qs)", current_function_decl,
+		      ctr_names[counter]);
       if (warning_printed && dump_enabled_p ())
 	{
 	  dump_user_location_t loc

gcc/coverage.h

@@ -52,7 +52,8 @@ extern tree tree_coverage_counter_addr (unsigned /*counter*/, unsigned/*num*/);
 /* Get all the counters for the current function.  */
 extern gcov_type *get_coverage_counts (unsigned /*counter*/,
 				       unsigned /*cfg_checksum*/,
-				       unsigned /*lineno_checksum*/);
+				       unsigned /*lineno_checksum*/,
+				       unsigned /*n_counts*/);
 
 extern tree get_gcov_type (void);
 extern bool coverage_node_map_initialized_p (void);

gcc/profile.c

@@ -218,7 +218,7 @@ get_exec_counts (unsigned cfg_checksum, unsigned lineno_checksum)
     }
 
   counts = get_coverage_counts (GCOV_COUNTER_ARCS, cfg_checksum,
-				lineno_checksum);
+				lineno_checksum, num_edges);
   if (!counts)
     return NULL;
 
@@ -780,7 +780,8 @@ compute_value_histograms (histogram_values values, unsigned cfg_checksum,
 
       histogram_counts[t] = get_coverage_counts (COUNTER_FOR_HIST_TYPE (t),
 						 cfg_checksum,
-						 lineno_checksum);
+						 lineno_checksum,
+						 n_histogram_counters[t]);
       if (histogram_counts[t])
 	any = 1;
       act_count[t] = histogram_counts[t];