gcov: Add block_info::block_info (PR gcov-profile/80911).

2017-06-08  Martin Liska  <mliska@suse.cz>

	PR gcov-profile/80911
	* gcov.c (block_info::block_info): New constructor.

From-SVN: r249006

gcc/ChangeLog

+2017-06-08  Martin Liska  <mliska@suse.cz>
+
+	PR gcov-profile/80911
+	* gcov.c (block_info::block_info): New constructor.
+
 2017-06-08  Tamar Christina  <tamar.christina@arm.com>
 
 	PR middle-end/77925

gcc/gcov.c

@@ -132,6 +132,9 @@ struct block_location_info
 
 typedef struct block_info
 {
+  /* Constructor.  */
+  block_info ();
+
   /* Chain of exit and entry arcs.  */
   arc_t *succ;
   arc_t *pred;
@@ -173,6 +176,14 @@ typedef struct block_info
 
 } block_t;
 
+block_info::block_info (): succ (NULL), pred (NULL), num_succ (0), num_pred (0),
+  id (0), count (0), count_valid (0), valid_chain (0), invalid_chain (0),
+  exceptional (0), is_call_site (0), is_call_return (0), is_nonlocal_return (0),
+  locations (), chain (NULL)
+{
+  cycle.arc = NULL;
+}
+
 /* Describes a single function. Contains an array of basic blocks.  */
 
 typedef struct function_info