Avoid segfault when doing IPA-VRP but not IPA-CP (PR 93015)

2019-12-21  Martin Jambor  <mjambor@suse.cz>

	PR ipa/93015
	* ipa-cp.c (ipcp_store_vr_results): Check that info exists

	testsuite/
	* gcc.dg/lto/pr93015_0.c: New test.

From-SVN: r279695

gcc/ChangeLog

+2019-12-21  Martin Jambor  <mjambor@suse.cz>
+
+	PR ipa/93015
+	* ipa-cp.c (ipcp_store_vr_results): Check that info exists
+
 2019-12-20   Michael Meissner  <meissner@linux.ibm.com>
 
 	* config/rs6000/predicates.md (cint34_operand): Use

gcc/ipa-cp.c

@@ -5728,7 +5728,7 @@ ipcp_store_vr_results (void)
       ipa_node_params *info = IPA_NODE_REF (node);
       bool found_useful_result = false;
 
-      if (!opt_for_fn (node->decl, flag_ipa_vrp))
+      if (!info || !opt_for_fn (node->decl, flag_ipa_vrp))
 	{
 	  if (dump_file)
 	    fprintf (dump_file, "Not considering %s for VR discovery "

gcc/testsuite/ChangeLog

+2019-12-21  Martin Jambor  <mjambor@suse.cz>
+
+	PR ipa/93015
+	* gcc.dg/lto/pr93015_0.c: New test.
+
 2019-12-19  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/92745 - bogus error when initializing array of vectors.

gcc/testsuite/gcc.dg/lto/pr93015_0.c

+/* { dg-lto-do link } */
+/* { dg-lto-options { { -O0 -fipa-vrp -flto } } } */
+
+int main() {
+
+}