re PR c/61553 (__atomic_store with non-pointer arg ICE)

	PR c/61553
	* c-common.c (get_atomic_generic_size): Don't segfault if the
	type doesn't have a size.

	* c-c++-common/pr61553.c: New test.

Co-Authored-By: Andrew MacLeod <amacleod@redhat.com>

From-SVN: r211905

gcc/c-family/ChangeLog

+2014-06-23  Marek Polacek  <polacek@redhat.com>
+	    Andrew MacLeod  <amacleod@redhat.com>
+
+	PR c/61553
+	* c-common.c (get_atomic_generic_size): Don't segfault if the
+	type doesn't have a size.
+
 2014-06-20  Marek Polacek  <polacek@redhat.com>
 
 	* c-gimplify.c: Include "c-ubsan.h" and "pointer-set.h".

gcc/c-family/c-common.c

@@ -10471,7 +10471,8 @@ get_atomic_generic_size (location_t loc, tree function,
 		    function);
 	  return 0;
 	}
-      size = tree_to_uhwi (TYPE_SIZE_UNIT (TREE_TYPE (type)));
+      tree type_size = TYPE_SIZE_UNIT (TREE_TYPE (type));
+      size = type_size ? tree_to_uhwi (type_size) : 0;
       if (size != size_0)
 	{
 	  error_at (loc, "size mismatch in argument %d of %qE", x + 1,

gcc/testsuite/ChangeLog

+2014-06-23  Marek Polacek  <polacek@redhat.com>
+
+	PR c/61553
+	* c-c++-common/pr61553.c: New test.
+
 2014-06-23  Richard Biener  <rguenther@suse.de>
 
 	* g++.dg/vect/slp-pr50413.cc: Scan and cleanup appropriate SLP dumps.

gcc/testsuite/c-c++-common/pr61553.c

+/* PR c/61553 */
+/* { dg-do compile } */
+
+void
+foo (char *s)
+{
+  __atomic_store (s, (void *) 0, __ATOMIC_SEQ_CST);
+}