re PR ipa/86124 (ICE in create_variable_info_for, at tree-ssa-structalias.c:6123)

2018-06-14  Richard Biener  <rguenther@suse.de>

	PR ipa/86124
	* tree-ssa-struct-alias.c (create_variable_info_for): Handle
	NULL cgraph_node.

	* gcc.dg/pr86124.c: New testcase.

From-SVN: r261587

gcc/ChangeLog

+2018-06-14  Richard Biener  <rguenther@suse.de>
+
+	PR ipa/86124
+	* tree-ssa-struct-alias.c (create_variable_info_for): Handle
+	NULL cgraph_node.
+
 2018-06-14  Sebastian Huber  <sebastian.huber@embedded-brains.de>
 
 	* config/rtems.h (STDINT_LONG32): Define.

gcc/testsuite/ChangeLog

+2018-06-14  Richard Biener  <rguenther@suse.de>
+
+	PR ipa/86124
+	* gcc.dg/pr86124.c: New testcase.
+
 2018-06-13  Martin Sebor  <msebor@redhat.com>
 
 	PR tree-optimization/86114

gcc/testsuite/gcc.dg/pr86124.c

+/* { dg-do compile } */
+/* { dg-options "-O -fipa-pta" } */
+
+extern void a (void);
+
+void b (void)
+{
+  void *c;
+  c = a;
+  *(char *)c = 1;
+}

gcc/tree-ssa-structalias.c

@@ -6120,7 +6120,8 @@ create_variable_info_for (tree decl, const char *name, bool add_id)
   cgraph_node *node;
   if (in_ipa_mode
       && TREE_CODE (decl) == FUNCTION_DECL
-      && (node = cgraph_node::get (decl))->ifunc_resolver)
+      && (node = cgraph_node::get (decl))
+      && node->ifunc_resolver)
     {
       varinfo_t fi = get_vi_for_tree (node->get_alias_target ()->decl);
       constraint_expr rhs