cselib+expr+bitmap: Change return type of predicate functions from int to bool

gcc/ChangeLog:

	* cselib.h (rtx_equal_for_cselib_1):
	Change return type from int to bool.
	(references_value_p): Ditto.
	(rtx_equal_for_cselib_p): Ditto.
	* expr.h (can_store_by_pieces): Ditto.
	(try_casesi): Ditto.
	(try_tablejump): Ditto.
	(safe_from_p): Ditto.
	* sbitmap.h (bitmap_equal_p): Ditto.
	* cselib.cc (references_value_p): Change return type
	from int to void and adjust function body accordingly.
	(rtx_equal_for_cselib_1): Ditto.
	* expr.cc (is_aligning_offset): Ditto.
	(can_store_by_pieces): Ditto.
	(mostly_zeros_p): Ditto.
	(all_zeros_p): Ditto.
	(safe_from_p): Ditto.
	(is_aligning_offset): Ditto.
	(try_casesi): Ditto.
	(try_tablejump): Ditto.
	(store_constructor): Change "need_to_clear" and
	"const_bounds_p" variables to bool.
	* sbitmap.cc (bitmap_equal_p): 	Change return type from int to bool.

1 files changed, 9 insertions, 7 deletions

diff --git a/gcc/expr.h b/gcc/expr.h
index 0c059ed..11bff53 100644
--- a/gcc/expr.h
+++ b/gcc/expr.h
@@ -222,16 +222,16 @@ extern bool set_storage_via_setmem (rtx, rtx, rtx, unsigned int,
 				    unsigned HOST_WIDE_INT,
 				    unsigned HOST_WIDE_INT);
 
-/* Return nonzero if it is desirable to store LEN bytes generated by
+/* Return true if it is desirable to store LEN bytes generated by
    CONSTFUN with several move instructions by store_by_pieces
    function.  CONSTFUNDATA is a pointer which will be passed as argument
    in every CONSTFUN call.
    ALIGN is maximum alignment we can assume.
    MEMSETP is true if this is a real memset/bzero, not a copy
    of a const string.  */
-extern int can_store_by_pieces (unsigned HOST_WIDE_INT,
-				by_pieces_constfn,
-				void *, unsigned int, bool);
+extern bool can_store_by_pieces (unsigned HOST_WIDE_INT,
+				 by_pieces_constfn,
+				 void *, unsigned int, bool);
 
 /* Generate several move instructions to store LEN bytes generated by
    CONSTFUN to block TO.  (A MEM rtx with BLKmode).  CONSTFUNDATA is a
@@ -329,10 +329,12 @@ extern enum tree_code maybe_optimize_mod_cmp (enum tree_code, tree *, tree *);
 extern void maybe_optimize_sub_cmp_0 (enum tree_code, tree *, tree *);
 
 /* Two different ways of generating switch statements.  */
-extern int try_casesi (tree, tree, tree, tree, rtx, rtx, rtx, profile_probability);
-extern int try_tablejump (tree, tree, tree, tree, rtx, rtx, profile_probability);
+extern bool try_casesi (tree, tree, tree, tree, rtx, rtx, rtx,
+			profile_probability);
+extern bool try_tablejump (tree, tree, tree, tree, rtx, rtx,
+			   profile_probability);
 
-extern int safe_from_p (const_rtx, tree, int);
+extern bool safe_from_p (const_rtx, tree, int);
 
 /* Get the personality libfunc for a function decl.  */
 rtx get_personality_function (tree);