tree+ggc: Change return type of predicate functions from int to bool

Also change internal variable from int to bool.

gcc/ChangeLog:

	* tree.h (tree_int_cst_equal): Change return type from int to bool.
	(operand_equal_for_phi_arg_p): Ditto.
	(tree_map_base_marked_p): Ditto.
	* tree.cc (contains_placeholder_p): Update function body
	for bool return type.
	(type_cache_hasher::equal): Ditto.
	(tree_map_base_hash): Change return type
	from int to void and adjust function body accordingly.
	(tree_int_cst_equal): Ditto.
	(operand_equal_for_phi_arg_p): Ditto.
	(get_narrower): Change "first" variable to bool.
	(cl_option_hasher::equal): Update function body for bool return type.
	* ggc.h (ggc_set_mark): Change return type from int to bool.
	(ggc_marked_p): Ditto.
	* ggc-page.cc (gt_ggc_mx): Change return type
	from int to void and adjust function body accordingly.
	(ggc_set_mark): Ditto.

1 files changed, 4 insertions, 4 deletions

diff --git a/gcc/ggc.h b/gcc/ggc.h
index 78eab7e..34108e2 100644
--- a/gcc/ggc.h
+++ b/gcc/ggc.h
@@ -90,15 +90,15 @@ extern const struct ggc_root_tab * const gt_pch_scalar_rtab[];
 
 /* Actually set the mark on a particular region of memory, but don't
    follow pointers.  This function is called by ggc_mark_*.  It
-   returns zero if the object was not previously marked; nonzero if
+   returns false if the object was not previously marked; true if
    the object was already marked, or if, for any other reason,
    pointers in this data structure should not be traversed.  */
-extern int ggc_set_mark	(const void *);
+extern bool ggc_set_mark (const void *);
 
-/* Return 1 if P has been marked, zero otherwise.
+/* Return true if P has been marked, zero otherwise.
    P must have been allocated by the GC allocator; it mustn't point to
    static objects, stack variables, or memory allocated with malloc.  */
-extern int ggc_marked_p	(const void *);
+extern bool ggc_marked_p (const void *);
 
 /* PCH and GGC handling for strings, mostly trivial.  */
 extern void gt_pch_n_S (const void *);