ipa-profie.c (ipa_profile): Check number of parameters and possible polymorphic call...

	* ipa-profie.c (ipa_profile): Check number of parameters
	and possible polymorphic call targets before
	devirtualizing.

From-SVN: r222053

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e846816e09d1165b80213855a0195046dd9c5819..9dcdea6989a673434d8c76ab5717a80056fd2aa8 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2015-04-12  Jan Hubicka  <hubicka@ucw.cz>
+
+       * ipa-profie.c (ipa_profile): Check number of parameters
+       and possible polymorphic call targets before
+       devirtualizing.
+
 2015-04-13  Uros Bizjak  <ubizjak@gmail.com>
 
        * config/i386/i386.md (*bmi2_umul<mode><dwi>3_1): Merge from

diff --git a/gcc/ipa-profile.c b/gcc/ipa-profile.c
index 09298778452ddd94a4ff1fd42c5554f950febbee..e9f937fdf3bc2c80ccd56fd2abb8ea73db0d415c 100644 (file)
--- a/gcc/ipa-profile.c
+++ b/gcc/ipa-profile.c
@@ -524,6 +524,7 @@ ipa_profile (void)
   gcov_type overall_time = 0, cutoff = 0, cumulated = 0, overall_size = 0;
   struct cgraph_node *n,*n2;
   int nindirect = 0, ncommon = 0, nunknown = 0, nuseless = 0, nconverted = 0;
+  int nmismatch = 0, nimpossible = 0;
   bool node_map_initialized = false;
 
   if (dump_file)
@@ -651,6 +652,31 @@ ipa_profile (void)
                                 "Not speculating: target is overwritable "
                                 "and can be discarded.\n");
                    }
+                 else if (ipa_node_params_sum && ipa_edge_args_vector
+                          && !IPA_NODE_REF (n2)->descriptors.is_empty ()
+                          && ipa_get_param_count (IPA_NODE_REF (n2))
+                             != ipa_get_cs_argument_count (IPA_EDGE_REF (e))
+                           && (ipa_get_param_count (IPA_NODE_REF (n2))
+                               >= ipa_get_cs_argument_count (IPA_EDGE_REF (e))
+                               || !stdarg_p (TREE_TYPE (n2->decl))))
+                   {
+                     nmismatch++;
+                     if (dump_file)
+                       fprintf (dump_file,
+                                "Not speculating: "
+                                "parameter count mistmatch\n");
+                   }
+                 else if (e->indirect_info->polymorphic
+                          && !opt_for_fn (n->decl, flag_devirtualize)
+                          && !possible_polymorphic_call_target_p (e, n2))
+                   {
+                     nimpossible++;
+                     if (dump_file)
+                       fprintf (dump_file,
+                                "Not speculating: "
+                                "function is not in the polymorphic "
+                                "call target list\n");
+                   }
                  else
                    {
                      /* Target may be overwritable, but profile says that
@@ -693,11 +719,15 @@ ipa_profile (void)
             "%i indirect calls trained.\n"
             "%i (%3.2f%%) have common target.\n"
             "%i (%3.2f%%) targets was not found.\n"
+            "%i (%3.2f%%) targets had parameter count mismatch.\n"
+            "%i (%3.2f%%) targets was not in polymorphic call target list.\n"
             "%i (%3.2f%%) speculations seems useless.\n"
             "%i (%3.2f%%) speculations produced.\n",
             nindirect,
             ncommon, ncommon * 100.0 / nindirect,
             nunknown, nunknown * 100.0 / nindirect,
+            nmismatch, nmismatch * 100.0 / nindirect,
+            nimpossible, nimpossible * 100.0 / nindirect,
             nuseless, nuseless * 100.0 / nindirect,
             nconverted, nconverted * 100.0 / nindirect);