Clear version_info_node in delete_function_version.

2019-11-07  Martin Liska  <mliska@suse.cz>

	PR c++/92354
	* cgraph.c (delete_function_version): Clear global
	variable version_info_node if equal to deleted
	function.
2019-11-07  Martin Liska  <mliska@suse.cz>

	PR c++/92354
	* g++.target/i386/pr92354.C: New test.

From-SVN: r277913

gcc/ChangeLog

 2019-11-07  Martin Liska  <mliska@suse.cz>
 
+	PR c++/92354
+	* cgraph.c (delete_function_version): Clear global
+	variable version_info_node if equal to deleted
+	function.
+
+2019-11-07  Martin Liska  <mliska@suse.cz>
+
 	* fold-const.c (operand_compare::operand_equal_p): Add comparison
 	of CONSTRUCTOR_NO_CLEARING.
 	(operand_compare::hash_operand): Likewise.

gcc/cgraph.c

@@ -197,6 +197,9 @@ delete_function_version (cgraph_function_version_info *decl_v)
   if (decl_v == NULL)
     return;
 
+  if (version_info_node == decl_v)
+    version_info_node = NULL;
+
   if (decl_v->prev != NULL)
     decl_v->prev->next = decl_v->next;
 

gcc/testsuite/ChangeLog

+2019-11-07  Martin Liska  <mliska@suse.cz>
+
+	PR c++/92354
+	* g++.target/i386/pr92354.C: New test.
+
 2019-11-07  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>
 
 	* gcc.dg/tree-ssa/pr92163.c: Add dg-require-effective-target fopenacc.

gcc/testsuite/g++.target/i386/pr92354.C

+/* PR c++/92354 */
+/* { dg-do compile } */
+/* { dg-require-ifunc "" }  */
+/* { dg-options "--param ggc-min-heapsize=0" } */
+
+__attribute__ ((target ("default"))) void f ();
+__attribute__ ((target ("sse"))) void f ();
+__attribute__ ((target ("default"))) void f ();