fold-const+optabs: Change return type of predicate functions from int to bool

Also change some internal variables and function argument from int to bool.

gcc/ChangeLog:

	* fold-const.h (multiple_of_p): Change return type from int to bool.
	* fold-const.cc (split_tree): Change negl_p, neg_litp_p,
	neg_conp_p and neg_var_p variables to bool.
	(const_binop): Change sat_p variable to bool.
	(merge_ranges): Change no_overlap variable to bool.
	(extract_muldiv_1): Change same_p variable to bool.
	(tree_swap_operands_p): Update function body for bool return type.
	(fold_truth_andor): Change commutative variable to bool.
	(multiple_of_p): Change return type
	from int to void and adjust function body accordingly.
	* optabs.h (expand_twoval_unop): Change return type from int to bool.
	(expand_twoval_binop): Ditto.
	(can_compare_p): Ditto.
	(have_add2_insn): Ditto.
	(have_addptr3_insn): Ditto.
	(have_sub2_insn): Ditto.
	(have_insn_for): Ditto.
	* optabs.cc (add_equal_note): Ditto.
	(widen_operand): Change no_extend argument from int to bool.
	(expand_binop): Ditto.
	(expand_twoval_unop): Change return type
	from int to void and adjust function body accordingly.
	(expand_twoval_binop): Ditto.
	(can_compare_p): Ditto.
	(have_add2_insn): Ditto.
	(have_addptr3_insn): Ditto.
	(have_sub2_insn): Ditto.
	(have_insn_for): Ditto.

1 files changed, 8 insertions, 8 deletions

diff --git a/gcc/optabs.h b/gcc/optabs.h
index 29ccbe9..781d554 100644
--- a/gcc/optabs.h
+++ b/gcc/optabs.h
@@ -200,10 +200,10 @@ extern rtx sign_expand_binop (machine_mode, optab, optab, rtx, rtx,
 			      rtx, int, enum optab_methods);
 
 /* Generate code to perform an operation on one operand with two results.  */
-extern int expand_twoval_unop (optab, rtx, rtx, rtx, int);
+extern bool expand_twoval_unop (optab, rtx, rtx, rtx, int);
 
 /* Generate code to perform an operation on two operands with two results.  */
-extern int expand_twoval_binop (optab, rtx, rtx, rtx, rtx, int);
+extern bool expand_twoval_binop (optab, rtx, rtx, rtx, rtx, int);
 
 /* Generate code to perform an operation on two operands with two
    results, using a library function.  */
@@ -243,8 +243,8 @@ enum can_compare_purpose
 
 /* Nonzero if a compare of mode MODE can be done straightforwardly
    (without splitting it into pieces).  */
-extern int can_compare_p (enum rtx_code, machine_mode,
-			  enum can_compare_purpose);
+extern bool can_compare_p (enum rtx_code, machine_mode,
+			   enum can_compare_purpose);
 
 /* Return whether the backend can emit a vector comparison (vec_cmp/vec_cmpu)
    for code CODE, comparing operands of mode VALUE_MODE and producing a result
@@ -298,12 +298,12 @@ rtx emit_conditional_add (rtx, enum rtx_code, rtx, rtx, machine_mode,
    Likewise for subtraction and for just copying.  */
 extern rtx_insn *gen_add2_insn (rtx, rtx);
 extern rtx_insn *gen_add3_insn (rtx, rtx, rtx);
-extern int have_add2_insn (rtx, rtx);
+extern bool have_add2_insn (rtx, rtx);
 extern rtx_insn *gen_addptr3_insn (rtx, rtx, rtx);
-extern int have_addptr3_insn (rtx, rtx, rtx);
+extern bool have_addptr3_insn (rtx, rtx, rtx);
 extern rtx_insn *gen_sub2_insn (rtx, rtx);
 extern rtx_insn *gen_sub3_insn (rtx, rtx, rtx);
-extern int have_sub2_insn (rtx, rtx);
+extern bool have_sub2_insn (rtx, rtx);
 
 /* Generate the body of an insn to extend Y (with mode MFROM)
    into X (with mode MTO).  Do zero-extension if UNSIGNEDP is nonzero.  */
@@ -323,7 +323,7 @@ extern bool expand_sfix_optab (rtx, rtx, convert_optab);
 
 /* Report whether the machine description contains an insn which can
    perform the operation described by CODE and MODE.  */
-extern int have_insn_for (enum rtx_code, machine_mode);
+extern bool have_insn_for (enum rtx_code, machine_mode);
 
 /* Generate a conditional trap instruction.  */
 extern rtx_insn *gen_cond_trap (enum rtx_code, rtx, rtx, rtx);