ipa-comdats.c (propagate_comdat_group): Walk through thunks.

gcc/

	* ipa-comdats.c (propagate_comdat_group): Walk through thunks.

gcc/testsuite/

	* gcc.target/i386/mpx/chkp-thunk-comdat-3.c: New.

From-SVN: r221919

gcc/ChangeLog

+2015-04-08  Ilya Enkovich  <ilya.enkovich@intel.com>
+
+	* ipa-comdats.c (propagate_comdat_group): Walk through thunks.
+
 2015-04-08  Gerald Pfeifer  <gerald@pfeifer.com>
 
 	* doc/install.texi (bootstrap-lto-noplugin): Rewrite. 

gcc/ipa-comdats.c

@@ -142,12 +142,14 @@ propagate_comdat_group (struct symtab_node *symbol,
       {
 	struct symtab_node *symbol2 = edge->caller;
 
-	/* If we see inline clone, its comdat group actually
-	   corresponds to the comdat group of the function it is inlined
-	   to.  */
-
 	if (cgraph_node * cn = dyn_cast <cgraph_node *> (symbol2))
 	  {
+	    /* Thunks can not call across section boundary.  */
+	    if (cn->thunk.thunk_p)
+	      newgroup = propagate_comdat_group (symbol2, newgroup, map);
+	    /* If we see inline clone, its comdat group actually
+	       corresponds to the comdat group of the function it
+	       is inlined to.  */
 	    if (cn->global.inlined_to)
 	      symbol2 = cn->global.inlined_to;
 	  }

gcc/testsuite/ChangeLog

 2015-04-08  Ilya Enkovich  <ilya.enkovich@intel.com>
 
+	* gcc.target/i386/mpx/chkp-thunk-comdat-3.c: New.
+
+2015-04-08  Ilya Enkovich  <ilya.enkovich@intel.com>
+
 	* gcc/testsuite/gcc.target/i386/thunk-retbnd.c: New.
 
 2015-04-08  Eric Botcazou  <ebotcazou@adacore.com>

gcc/testsuite/gcc.target/i386/mpx/chkp-thunk-comdat-3.c

+/* { dg-do compile } */
+/* { dg-options "-fcheck-pointer-bounds -mmpx -O -fvisibility=hidden" } */
+
+int val;
+
+static int __attribute__((noinline))
+test1 ()
+{
+  return val;
+}
+
+static int __attribute__((bnd_legacy,noinline))
+test2 ()
+{
+  return test1 ();
+}
+
+int
+test3 (void)
+{
+  return test2 ();
+}
+