coverage.c (get_coverage_counts): Use current_function_decl.

* coverage.c (get_coverage_counts): Use current_function_decl.
	* profile.c (read_thunk_profile): New function.
	(branch_prob): Add THUNK parameter.
	* tree-profile.c (tree_profiling): Handle thunks.
	* value-prof.c (init_node_map): Handle thunks.
	* value-prof.h (branch_prob): Upate prototype.
	(read_thunk_profile): Declare.

	* g++.dg/tree-prof/devirt.C: Update testcase.

From-SVN: r267495

gcc/ChangeLog

@@ -1,3 +1,13 @@
+2019-01-01  Jan Hubicka  <hubicka@ucw.cz>
+
+	* coverage.c (get_coverage_counts): Use current_function_decl.
+	* profile.c (read_thunk_profile): New function.
+	(branch_prob): Add THUNK parameter.
+	* tree-profile.c (tree_profiling): Handle thunks.
+	* value-prof.c (init_node_map): Handle thunks.
+	* value-prof.h (branch_prob): Upate prototype.
+	(read_thunk_profile): Declare.
+
 2019-01-01  Jakub Jelinek  <jakub@redhat.com>
 
 	Update copyright years.

gcc/coverage.c

@@ -329,7 +329,7 @@ get_coverage_counts (unsigned counter, unsigned cfg_checksum,
   else
     {
       gcc_assert (coverage_node_map_initialized_p ());
-      elt.ident = cgraph_node::get (cfun->decl)->profile_id;
+      elt.ident = cgraph_node::get (current_function_decl)->profile_id;
     }
   elt.ctr = counter;
   entry = counts_hash->find (&elt);

gcc/profile.c

@@ -963,6 +963,25 @@ compare_freqs (const void *p1, const void *p2)
   return e2->dest->index - e1->dest->index;
 }
 
+/* Only read execution count for thunks.  */
+
+void
+read_thunk_profile (struct cgraph_node *node)
+{
+  tree old = current_function_decl;
+  current_function_decl = node->decl;
+  gcov_type *counts = get_coverage_counts (GCOV_COUNTER_ARCS, 0, 0, 1);
+  if (counts)
+    {
+      node->callees->count = node->count
+	 = profile_count::from_gcov_type (counts[0]);
+      free (counts);
+    }
+  current_function_decl = old;
+  return;
+}
+
+
 /* Instrument and/or analyze program behavior based on program the CFG.
 
    This function creates a representation of the control flow graph (of
@@ -983,7 +1002,7 @@ compare_freqs (const void *p1, const void *p2)
    Main entry point of this file.  */
 
 void
-branch_prob (void)
+branch_prob (bool thunk)
 {
   basic_block bb;
   unsigned i;
@@ -1000,6 +1019,8 @@ branch_prob (void)
 
   hash_set <location_triplet_hash> streamed_locations;
 
+  if (!thunk)
+    {
       /* We can't handle cyclic regions constructed using abnormal edges.
 	 To avoid these we replace every source of abnormal edge by a fake
 	 edge from entry node and every destination by fake edge to exit.
@@ -1115,6 +1136,7 @@ branch_prob (void)
 		}
 	    }
 	}
+    }
 
   el = create_edge_list ();
   num_edges = NUM_EDGES (el);
@@ -1143,7 +1165,18 @@ branch_prob (void)
      on the spanning tree.  We insert as many abnormal and critical edges
      as possible to minimize number of edge splits necessary.  */
 
+  if (!thunk)
     find_spanning_tree (el);
+  else
+    {
+      edge e;
+      edge_iterator ei;
+      /* Keep only edge from entry block to be instrumented.  */
+      FOR_EACH_BB_FN (bb, cfun)
+	FOR_EACH_EDGE (e, ei, bb->succs)
+	  EDGE_INFO (e)->ignore = true;
+    }
+
 
   /* Fake edges that are not on the tree will not be instrumented, so
      mark them ignored.  */
@@ -1183,8 +1216,17 @@ branch_prob (void)
      the checksum in only once place, since it depends on the shape
      of the control flow which can change during 
      various transformations.  */
+  if (thunk)
+    {
+      /* At stream in time we do not have CFG, so we can not do checksums.  */
+      cfg_checksum = 0;
+      lineno_checksum = 0;
+    }
+  else
+    {
       cfg_checksum = coverage_compute_cfg_checksum (cfun);
       lineno_checksum = coverage_compute_lineno_checksum ();
+    }
 
   /* Write the data from which gcov can reconstruct the basic block
      graph and function line numbers (the gcno file).  */

gcc/testsuite/ChangeLog

@@ -1,3 +1,7 @@
+2019-01-01  Jan Hubicka  <hubicka@ucw.cz>
+
+	* g++.dg/tree-prof/devirt.C: Update testcase.
+
 2019-01-01  Jakub Jelinek  <jakub@redhat.com>
 
 	Update copyright years.

gcc/testsuite/g++.dg/tree-prof/devirt.C

@@ -119,5 +119,5 @@ main ()
     __builtin_abort ();
 }
 
-/* { dg-final-use-not-autofdo { scan-tree-dump-times "folding virtual function call to virtual unsigned int mozPersonalDictionary::_ZThn16" 3 "dom3" } } */
-/* { dg-final-use-not-autofdo { scan-tree-dump-times "folding virtual function call to virtual unsigned int mozPersonalDictionary::AddRef" 3 "dom3" } } */
+/* { dg-final-use-not-autofdo { scan-tree-dump-times "folding virtual function call to virtual unsigned int mozPersonalDictionary::_ZThn16" 1 "dom3" } } */
+/* { dg-final-use-not-autofdo { scan-tree-dump-times "folding virtual function call to virtual unsigned int mozPersonalDictionary::AddRef" 1 "dom3" } } */

gcc/tree-profile.c

@@ -739,7 +739,8 @@ tree_profiling (void)
 
   FOR_EACH_DEFINED_FUNCTION (node)
     {
-      if (!gimple_has_body_p (node->decl))
+      bool thunk = false;
+      if (!gimple_has_body_p (node->decl) && !node->thunk.thunk_p)
 	continue;
 
       /* Don't profile functions produced for builtin stuff.  */
@@ -760,22 +761,43 @@ tree_profiling (void)
       if (!include_source_file_for_profile (file))
 	continue;
 
+      if (node->thunk.thunk_p)
+	{
+	  /* We can not expand variadic thunks to Gimple.  */
+	  if (stdarg_p (TREE_TYPE (node->decl)))
+	    continue;
+	  thunk = true;
+	  /* When generate profile, expand thunk to gimple so it can be
+	     instrumented same way as other functions.  */
+	  if (profile_arc_flag)
+	    node->expand_thunk (false, true);
+	  /* Read cgraph profile but keep function as thunk at profile-use
+	     time.  */
+	  else
+	    {
+	      read_thunk_profile (node);
+	      continue;
+	    }
+	}
+
       push_cfun (DECL_STRUCT_FUNCTION (node->decl));
 
       if (dump_file)
 	dump_function_header (dump_file, cfun->decl, dump_flags);
 
       /* Local pure-const may imply need to fixup the cfg.  */
-      if (execute_fixup_cfg () & TODO_cleanup_cfg)
+      if (gimple_has_body_p (node->decl)
+	  && (execute_fixup_cfg () & TODO_cleanup_cfg))
 	cleanup_tree_cfg ();
 
-      branch_prob ();
+      branch_prob (thunk);
 
       if (! flag_branch_probabilities
 	  && flag_profile_values)
 	gimple_gen_ic_func_profiler ();
 
       if (flag_branch_probabilities
+	  && !thunk
 	  && flag_profile_values
 	  && flag_value_profile_transformations)
 	gimple_value_profile_transformations ();

gcc/value-prof.c

@@ -1188,7 +1188,7 @@ init_node_map (bool local)
   cgraph_node_map = new hash_map<profile_id_hash, cgraph_node *>;
 
   FOR_EACH_DEFINED_FUNCTION (n)
-    if (n->has_gimple_body_p ())
+    if (n->has_gimple_body_p () || n->thunk.thunk_p)
       {
 	cgraph_node **val;
 	if (local)

gcc/value-prof.h

@@ -112,7 +112,8 @@ extern struct cgraph_node* find_func_by_profile_id (int func_id);
 
 /* In profile.c.  */
 extern void init_branch_prob (void);
-extern void branch_prob (void);
+extern void branch_prob (bool);
+extern void read_thunk_profile (struct cgraph_node *);
 extern void end_branch_prob (void);
 
 #endif	/* GCC_VALUE_PROF_H */