re PR sanitizer/59415 (ICE segfault in verify_bb_vtables for g++ -S…

re PR sanitizer/59415 (ICE segfault in verify_bb_vtables for g++ -S -fvtable-verify=std -fsanitize=null)

	PR sanitizer/59415
	* vtable-verify.c (verify_bb_vtables): Check the return value
	of gimple_call_fn.  Use is_gimple_call instead of gimple_code.
testsuite/
	* g++.dg/ubsan/pr59415.C: New test.

From-SVN: r205805

gcc/ChangeLog

+2013-12-09  Marek Polacek  <polacek@redhat.com>
+
+	PR sanitizer/59415
+	* vtable-verify.c (verify_bb_vtables): Check the return value
+	of gimple_call_fn.  Use is_gimple_call instead of gimple_code.
+
 2013-12-09  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
 	* config/arm/arm.md (generic_sched): Add cortexa12.

gcc/testsuite/ChangeLog

+2013-12-09  Marek Polacek  <polacek@redhat.com>
+
+	PR sanitizer/59415
+	* g++.dg/ubsan/pr59415.C: New test.
+
 2013-12-09  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/52707

gcc/testsuite/g++.dg/ubsan/pr59415.C

+/* { dg-do compile } */
+/* { dg-options "-fsanitize=null -Wall -fvtable-verify=std" } */
+
+void
+foo (void)
+{
+  throw 0;
+}

gcc/vtable-verify.c

@@ -586,10 +586,10 @@ verify_bb_vtables (basic_block bb)
       stmt = gsi_stmt (gsi_virtual_call);
 
       /* Count virtual calls.  */
-      if (gimple_code (stmt) == GIMPLE_CALL)
+      if (is_gimple_call (stmt))
         {
           tree fncall = gimple_call_fn (stmt);
-          if (TREE_CODE (fncall) == OBJ_TYPE_REF)
+          if (fncall && TREE_CODE (fncall) == OBJ_TYPE_REF)
             total_num_virtual_calls++;
         }