* gimple-ssa-warn-alloca.c

	(alloca_type_and_limit::alloca_type_and_limit): Initialize limit
	field for ALLOCA_BOUND_*_LARGE.

From-SVN: r264227

gcc/ChangeLog

+2018-09-12  Aldy Hernandez  <aldyh@redhat.com>
+
+	* gimple-ssa-warn-alloca.c
+	(alloca_type_and_limit::alloca_type_and_limit): Initialize limit
+	field for ALLOCA_BOUND_*_LARGE.
+
 2018-09-11  Nathan Sidwell  <nathan@acm.org>
 
 	* gcc.c (load_specs, execute, run_attempt): Use %qs not '%s'.

gcc/gimple-ssa-warn-alloca.c

@@ -128,7 +128,11 @@ struct alloca_type_and_limit {
   alloca_type_and_limit ();
   alloca_type_and_limit (enum alloca_type type,
 			 wide_int i) : type(type), limit(i) { }
-  alloca_type_and_limit (enum alloca_type type) : type(type) { }
+  alloca_type_and_limit (enum alloca_type type) : type(type)
+  { if (type == ALLOCA_BOUND_MAYBE_LARGE
+	|| type == ALLOCA_BOUND_DEFINITELY_LARGE)
+      limit = wi::to_wide (integer_zero_node);
+  }
 };
 
 /* Return the value of the argument N to -Walloca-larger-than= or