[thirdparty/gcc.git] / gcc / fold-const.h

/* Fold a constant sub-tree into a single node for C-compiler
   Copyright (C) 1987-2018 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */

#ifndef GCC_FOLD_CONST_H
#define GCC_FOLD_CONST_H

/* Non-zero if we are folding constants inside an initializer; zero
   otherwise.  */
extern int folding_initializer;

/* Convert between trees and native memory representation.  */
extern int native_encode_expr (const_tree, unsigned char *, int, int off = -1);
extern tree native_interpret_expr (tree, const unsigned char *, int);

/* Fold constants as much as possible in an expression.
   Returns the simplified expression.
   Acts only on the top level of the expression;
   if the argument itself cannot be simplified, its
   subexpressions are not changed.  */

extern tree fold (tree);
#define fold_unary(CODE,T1,T2)\
   fold_unary_loc (UNKNOWN_LOCATION, CODE, T1, T2)
extern tree fold_unary_loc (location_t, enum tree_code, tree, tree);
#define fold_unary_ignore_overflow(CODE,T1,T2)\
   fold_unary_ignore_overflow_loc (UNKNOWN_LOCATION, CODE, T1, T2)
extern tree fold_unary_ignore_overflow_loc (location_t, enum tree_code, tree, tree);
#define fold_binary(CODE,T1,T2,T3)\
   fold_binary_loc (UNKNOWN_LOCATION, CODE, T1, T2, T3)
extern tree fold_binary_loc (location_t, enum tree_code, tree, tree, tree);
#define fold_ternary(CODE,T1,T2,T3,T4)\
   fold_ternary_loc (UNKNOWN_LOCATION, CODE, T1, T2, T3, T4)
extern tree fold_ternary_loc (location_t, enum tree_code, tree, tree, tree, tree);
#define fold_build1(c,t1,t2)\
   fold_build1_loc (UNKNOWN_LOCATION, c, t1, t2 MEM_STAT_INFO)
extern tree fold_build1_loc (location_t, enum tree_code, tree,
			     tree CXX_MEM_STAT_INFO);
#define fold_build2(c,t1,t2,t3)\
   fold_build2_loc (UNKNOWN_LOCATION, c, t1, t2, t3 MEM_STAT_INFO)
extern tree fold_build2_loc (location_t, enum tree_code, tree, tree,
			     tree CXX_MEM_STAT_INFO);
#define fold_build3(c,t1,t2,t3,t4)\
   fold_build3_loc (UNKNOWN_LOCATION, c, t1, t2, t3, t4 MEM_STAT_INFO)
extern tree fold_build3_loc (location_t, enum tree_code, tree, tree, tree,
				  tree CXX_MEM_STAT_INFO);
extern tree fold_build1_initializer_loc (location_t, enum tree_code, tree, tree);
extern tree fold_build2_initializer_loc (location_t, enum tree_code, tree, tree, tree);
#define fold_build_call_array(T1,T2,N,T4)\
   fold_build_call_array_loc (UNKNOWN_LOCATION, T1, T2, N, T4)
extern tree fold_build_call_array_loc (location_t, tree, tree, int, tree *);
#define fold_build_call_array_initializer(T1,T2,N,T4)\
   fold_build_call_array_initializer_loc (UNKNOWN_LOCATION, T1, T2, N, T4)
extern tree fold_build_call_array_initializer_loc (location_t, tree, tree, int, tree *);
extern tree get_array_ctor_element_at_index (tree, offset_int);
extern bool fold_convertible_p (const_tree, const_tree);
#define fold_convert(T1,T2)\
   fold_convert_loc (UNKNOWN_LOCATION, T1, T2)
extern tree fold_convert_loc (location_t, tree, tree);
extern tree fold_single_bit_test (location_t, enum tree_code, tree, tree, tree);
extern tree fold_ignored_result (tree);
extern tree fold_abs_const (tree, tree);
extern tree fold_indirect_ref_1 (location_t, tree, tree);
extern void fold_defer_overflow_warnings (void);
extern void fold_undefer_overflow_warnings (bool, const gimple *, int);
extern void fold_undefer_and_ignore_overflow_warnings (void);
extern bool fold_deferring_overflow_warnings_p (void);
extern void fold_overflow_warning (const char*, enum warn_strict_overflow_code);
extern enum tree_code fold_div_compare (enum tree_code, tree, tree,
					tree *, tree *, bool *);
extern int operand_equal_p (const_tree, const_tree, unsigned int);
extern int multiple_of_p (tree, const_tree, const_tree);
#define omit_one_operand(T1,T2,T3)\
   omit_one_operand_loc (UNKNOWN_LOCATION, T1, T2, T3)
extern tree omit_one_operand_loc (location_t, tree, tree, tree);
#define omit_two_operands(T1,T2,T3,T4)\
   omit_two_operands_loc (UNKNOWN_LOCATION, T1, T2, T3, T4)
extern tree omit_two_operands_loc (location_t, tree, tree, tree, tree);
#define invert_truthvalue(T)\
   invert_truthvalue_loc (UNKNOWN_LOCATION, T)
extern tree invert_truthvalue_loc (location_t, tree);
extern tree fold_unary_to_constant (enum tree_code, tree, tree);
extern tree fold_binary_to_constant (enum tree_code, tree, tree, tree);
extern tree fold_bit_and_mask (tree, tree, enum tree_code,
			       tree, enum tree_code, tree, tree,
			       tree, enum tree_code, tree, tree, tree *);
extern tree fold_read_from_constant_string (tree);
extern bool wide_int_binop (wide_int &res, enum tree_code,
			    const wide_int &arg1, const wide_int &arg2,
			    signop, wi::overflow_type *);
extern tree int_const_binop (enum tree_code, const_tree, const_tree, int = 1);
#define build_fold_addr_expr(T)\
        build_fold_addr_expr_loc (UNKNOWN_LOCATION, (T))
extern tree build_fold_addr_expr_loc (location_t, tree);
#define build_fold_addr_expr_with_type(T,TYPE)\
        build_fold_addr_expr_with_type_loc (UNKNOWN_LOCATION, (T), TYPE)
extern tree build_fold_addr_expr_with_type_loc (location_t, tree, tree);
extern tree fold_build_cleanup_point_expr (tree type, tree expr);
#define build_fold_indirect_ref(T)\
        build_fold_indirect_ref_loc (UNKNOWN_LOCATION, T)
extern tree build_fold_indirect_ref_loc (location_t, tree);
#define fold_indirect_ref(T)\
        fold_indirect_ref_loc (UNKNOWN_LOCATION, T)
extern tree fold_indirect_ref_loc (location_t, tree);
extern tree build_simple_mem_ref_loc (location_t, tree);
#define build_simple_mem_ref(T)\
	build_simple_mem_ref_loc (UNKNOWN_LOCATION, T)
extern poly_offset_int mem_ref_offset (const_tree);
extern tree build_invariant_address (tree, tree, poly_int64);
extern tree constant_boolean_node (bool, tree);
extern tree div_if_zero_remainder (const_tree, const_tree);

extern bool tree_swap_operands_p (const_tree, const_tree);
extern enum tree_code swap_tree_comparison (enum tree_code);

extern bool ptr_difference_const (tree, tree, poly_int64_pod *);
extern enum tree_code invert_tree_comparison (enum tree_code, bool);
extern bool inverse_conditions_p (const_tree, const_tree);

extern bool tree_unary_nonzero_warnv_p (enum tree_code, tree, tree, bool *);
extern bool tree_binary_nonzero_warnv_p (enum tree_code, tree, tree, tree op1,
                                         bool *);
extern bool tree_single_nonzero_warnv_p (tree, bool *);
extern bool tree_unary_nonnegative_warnv_p (enum tree_code, tree, tree,
					    bool *, int);
extern bool tree_binary_nonnegative_warnv_p (enum tree_code, tree, tree, tree,
					     bool *, int);
extern bool tree_single_nonnegative_warnv_p (tree, bool *, int);
extern bool tree_call_nonnegative_warnv_p (tree, combined_fn, tree, tree,
					   bool *, int);

extern bool integer_valued_real_unary_p (tree_code, tree, int);
extern bool integer_valued_real_binary_p (tree_code, tree, tree, int);
extern bool integer_valued_real_call_p (combined_fn, tree, tree, int);
extern bool integer_valued_real_single_p (tree, int);
extern bool integer_valued_real_p (tree, int = 0);

extern bool fold_real_zero_addition_p (const_tree, const_tree, int);
extern tree combine_comparisons (location_t, enum tree_code, enum tree_code,
				 enum tree_code, tree, tree, tree);
extern void debug_fold_checksum (const_tree);
extern bool may_negate_without_overflow_p (const_tree);
#define round_up(T,N) round_up_loc (UNKNOWN_LOCATION, T, N)
extern tree round_up_loc (location_t, tree, unsigned int);
#define round_down(T,N) round_down_loc (UNKNOWN_LOCATION, T, N)
extern tree round_down_loc (location_t, tree, int);
extern tree size_int_kind (poly_int64, enum size_type_kind);
#define size_binop(CODE,T1,T2)\
   size_binop_loc (UNKNOWN_LOCATION, CODE, T1, T2)
extern tree size_binop_loc (location_t, enum tree_code, tree, tree);
#define size_diffop(T1,T2)\
   size_diffop_loc (UNKNOWN_LOCATION, T1, T2)
extern tree size_diffop_loc (location_t, tree, tree);

/* Return an expr equal to X but certainly not valid as an lvalue.  */
#define non_lvalue(T) non_lvalue_loc (UNKNOWN_LOCATION, T)
extern tree non_lvalue_loc (location_t, tree);

extern bool tree_expr_nonzero_p (tree);
extern bool tree_expr_nonnegative_p (tree);
extern bool tree_expr_nonnegative_warnv_p (tree, bool *, int = 0);
extern tree make_range (tree, int *, tree *, tree *, bool *);
extern tree make_range_step (location_t, enum tree_code, tree, tree, tree,
			     tree *, tree *, int *, bool *);
extern tree range_check_type (tree);
extern tree build_range_check (location_t, tree, tree, int, tree, tree);
extern bool merge_ranges (int *, tree *, tree *, int, tree, tree, int,
			  tree, tree);
extern tree sign_bit_p (tree, const_tree);
extern tree exact_inverse (tree, tree);
extern bool expr_not_equal_to (tree t, const wide_int &);
extern tree const_unop (enum tree_code, tree, tree);
extern tree const_binop (enum tree_code, tree, tree, tree);
extern bool negate_mathfn_p (combined_fn);
extern const char *c_getstr (tree, unsigned HOST_WIDE_INT * = NULL);
extern wide_int tree_nonzero_bits (const_tree);

/* Return OFF converted to a pointer offset type suitable as offset for
   POINTER_PLUS_EXPR.  Use location LOC for this conversion.  */
extern tree convert_to_ptrofftype_loc (location_t loc, tree off);

#define convert_to_ptrofftype(t) convert_to_ptrofftype_loc (UNKNOWN_LOCATION, t)

/* Build and fold a POINTER_PLUS_EXPR at LOC offsetting PTR by OFF.  */
extern tree fold_build_pointer_plus_loc (location_t loc, tree ptr, tree off);

#define fold_build_pointer_plus(p,o) \
	fold_build_pointer_plus_loc (UNKNOWN_LOCATION, p, o)

/* Build and fold a POINTER_PLUS_EXPR at LOC offsetting PTR by OFF.  */
extern tree fold_build_pointer_plus_hwi_loc (location_t loc, tree ptr, HOST_WIDE_INT off);

#define fold_build_pointer_plus_hwi(p,o) \
	fold_build_pointer_plus_hwi_loc (UNKNOWN_LOCATION, p, o)
#endif // GCC_FOLD_CONST_H
Commit	Line	Data
d8a2d370	1	/* Fold a constant sub-tree into a single node for C-compiler
85ec4feb	2	Copyright (C) 1987-2018 Free Software Foundation, Inc.
d8a2d370 DN	3
	4	This file is part of GCC.
	5
	6	GCC is free software; you can redistribute it and/or modify it under
	7	the terms of the GNU General Public License as published by the Free
	8	Software Foundation; either version 3, or (at your option) any later
	9	version.
	10
	11	GCC is distributed in the hope that it will be useful, but WITHOUT ANY
	12	WARRANTY; without even the implied warranty of MERCHANTABILITY or
	13	FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	14	for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with GCC; see the file COPYING3. If not see
	18	<http://www.gnu.org/licenses/>. */
	19
	20	#ifndef GCC_FOLD_CONST_H
	21	#define GCC_FOLD_CONST_H
	22
	23	/* Non-zero if we are folding constants inside an initializer; zero
	24	otherwise. */
	25	extern int folding_initializer;
	26
	27	/* Convert between trees and native memory representation. */
b2505143	28	extern int native_encode_expr (const_tree, unsigned char *, int, int off = -1);
d8a2d370 DN	29	extern tree native_interpret_expr (tree, const unsigned char *, int);
	30
	31	/* Fold constants as much as possible in an expression.
	32	Returns the simplified expression.
	33	Acts only on the top level of the expression;
	34	if the argument itself cannot be simplified, its
	35	subexpressions are not changed. */
	36
	37	extern tree fold (tree);
	38	#define fold_unary(CODE,T1,T2)\
	39	fold_unary_loc (UNKNOWN_LOCATION, CODE, T1, T2)
	40	extern tree fold_unary_loc (location_t, enum tree_code, tree, tree);
	41	#define fold_unary_ignore_overflow(CODE,T1,T2)\
	42	fold_unary_ignore_overflow_loc (UNKNOWN_LOCATION, CODE, T1, T2)
	43	extern tree fold_unary_ignore_overflow_loc (location_t, enum tree_code, tree, tree);
	44	#define fold_binary(CODE,T1,T2,T3)\
	45	fold_binary_loc (UNKNOWN_LOCATION, CODE, T1, T2, T3)
	46	extern tree fold_binary_loc (location_t, enum tree_code, tree, tree, tree);
	47	#define fold_ternary(CODE,T1,T2,T3,T4)\
	48	fold_ternary_loc (UNKNOWN_LOCATION, CODE, T1, T2, T3, T4)
	49	extern tree fold_ternary_loc (location_t, enum tree_code, tree, tree, tree, tree);
	50	#define fold_build1(c,t1,t2)\
226b8289 TS	51	fold_build1_loc (UNKNOWN_LOCATION, c, t1, t2 MEM_STAT_INFO)
	52	extern tree fold_build1_loc (location_t, enum tree_code, tree,
	53	tree CXX_MEM_STAT_INFO);
d8a2d370	54	#define fold_build2(c,t1,t2,t3)\
226b8289 TS	55	fold_build2_loc (UNKNOWN_LOCATION, c, t1, t2, t3 MEM_STAT_INFO)
	56	extern tree fold_build2_loc (location_t, enum tree_code, tree, tree,
	57	tree CXX_MEM_STAT_INFO);
d8a2d370	58	#define fold_build3(c,t1,t2,t3,t4)\
226b8289 TS	59	fold_build3_loc (UNKNOWN_LOCATION, c, t1, t2, t3, t4 MEM_STAT_INFO)
	60	extern tree fold_build3_loc (location_t, enum tree_code, tree, tree, tree,
	61	tree CXX_MEM_STAT_INFO);
d8a2d370 DN	62	extern tree fold_build1_initializer_loc (location_t, enum tree_code, tree, tree);
	63	extern tree fold_build2_initializer_loc (location_t, enum tree_code, tree, tree, tree);
	64	#define fold_build_call_array(T1,T2,N,T4)\
	65	fold_build_call_array_loc (UNKNOWN_LOCATION, T1, T2, N, T4)
	66	extern tree fold_build_call_array_loc (location_t, tree, tree, int, tree *);
	67	#define fold_build_call_array_initializer(T1,T2,N,T4)\
	68	fold_build_call_array_initializer_loc (UNKNOWN_LOCATION, T1, T2, N, T4)
	69	extern tree fold_build_call_array_initializer_loc (location_t, tree, tree, int, tree *);
6a636014	70	extern tree get_array_ctor_element_at_index (tree, offset_int);
d8a2d370 DN	71	extern bool fold_convertible_p (const_tree, const_tree);
	72	#define fold_convert(T1,T2)\
	73	fold_convert_loc (UNKNOWN_LOCATION, T1, T2)
	74	extern tree fold_convert_loc (location_t, tree, tree);
	75	extern tree fold_single_bit_test (location_t, enum tree_code, tree, tree, tree);
	76	extern tree fold_ignored_result (tree);
	77	extern tree fold_abs_const (tree, tree);
	78	extern tree fold_indirect_ref_1 (location_t, tree, tree);
	79	extern void fold_defer_overflow_warnings (void);
355fe088	80	extern void fold_undefer_overflow_warnings (bool, const gimple *, int);
d8a2d370 DN	81	extern void fold_undefer_and_ignore_overflow_warnings (void);
d8a2d370 DN	82	extern bool fold_deferring_overflow_warnings_p (void);
a8b85ce9	83	extern void fold_overflow_warning (const char*, enum warn_strict_overflow_code);
8d1628eb JJ	84	extern enum tree_code fold_div_compare (enum tree_code, tree, tree,
8d1628eb JJ	85	tree , tree , bool *);
d8a2d370 DN	86	extern int operand_equal_p (const_tree, const_tree, unsigned int);
	87	extern int multiple_of_p (tree, const_tree, const_tree);
	88	#define omit_one_operand(T1,T2,T3)\
	89	omit_one_operand_loc (UNKNOWN_LOCATION, T1, T2, T3)
	90	extern tree omit_one_operand_loc (location_t, tree, tree, tree);
	91	#define omit_two_operands(T1,T2,T3,T4)\
	92	omit_two_operands_loc (UNKNOWN_LOCATION, T1, T2, T3, T4)
	93	extern tree omit_two_operands_loc (location_t, tree, tree, tree, tree);
	94	#define invert_truthvalue(T)\
	95	invert_truthvalue_loc (UNKNOWN_LOCATION, T)
	96	extern tree invert_truthvalue_loc (location_t, tree);
	97	extern tree fold_unary_to_constant (enum tree_code, tree, tree);
	98	extern tree fold_binary_to_constant (enum tree_code, tree, tree, tree);
f2901002 JJ	99	extern tree fold_bit_and_mask (tree, tree, enum tree_code,
	100	tree, enum tree_code, tree, tree,
	101	tree, enum tree_code, tree, tree, tree *);
d8a2d370	102	extern tree fold_read_from_constant_string (tree);
5f9d2c58 AH	103	extern bool wide_int_binop (wide_int &res, enum tree_code,
	104	const wide_int &arg1, const wide_int &arg2,
	105	signop, wi::overflow_type *);
	106	extern tree int_const_binop (enum tree_code, const_tree, const_tree, int = 1);
d8a2d370 DN	107	#define build_fold_addr_expr(T)\
	108	build_fold_addr_expr_loc (UNKNOWN_LOCATION, (T))
	109	extern tree build_fold_addr_expr_loc (location_t, tree);
	110	#define build_fold_addr_expr_with_type(T,TYPE)\
	111	build_fold_addr_expr_with_type_loc (UNKNOWN_LOCATION, (T), TYPE)
	112	extern tree build_fold_addr_expr_with_type_loc (location_t, tree, tree);
	113	extern tree fold_build_cleanup_point_expr (tree type, tree expr);
d8a2d370 DN	114	#define build_fold_indirect_ref(T)\
	115	build_fold_indirect_ref_loc (UNKNOWN_LOCATION, T)
	116	extern tree build_fold_indirect_ref_loc (location_t, tree);
	117	#define fold_indirect_ref(T)\
	118	fold_indirect_ref_loc (UNKNOWN_LOCATION, T)
	119	extern tree fold_indirect_ref_loc (location_t, tree);
	120	extern tree build_simple_mem_ref_loc (location_t, tree);
	121	#define build_simple_mem_ref(T)\
	122	build_simple_mem_ref_loc (UNKNOWN_LOCATION, T)
aca52e6f	123	extern poly_offset_int mem_ref_offset (const_tree);
36fd6408	124	extern tree build_invariant_address (tree, tree, poly_int64);
d8a2d370	125	extern tree constant_boolean_node (bool, tree);
807e902e	126	extern tree div_if_zero_remainder (const_tree, const_tree);
d8a2d370	127
14e72812	128	extern bool tree_swap_operands_p (const_tree, const_tree);
d8a2d370 DN	129	extern enum tree_code swap_tree_comparison (enum tree_code);
d8a2d370 DN	130
f37fac2b	131	extern bool ptr_difference_const (tree, tree, poly_int64_pod *);
d8a2d370	132	extern enum tree_code invert_tree_comparison (enum tree_code, bool);
2c58d42c	133	extern bool inverse_conditions_p (const_tree, const_tree);
d8a2d370 DN	134
	135	extern bool tree_unary_nonzero_warnv_p (enum tree_code, tree, tree, bool *);
	136	extern bool tree_binary_nonzero_warnv_p (enum tree_code, tree, tree, tree op1,
	137	bool *);
	138	extern bool tree_single_nonzero_warnv_p (tree, bool *);
68e57f04 RS	139	extern bool tree_unary_nonnegative_warnv_p (enum tree_code, tree, tree,
68e57f04 RS	140	bool *, int);
d8a2d370	141	extern bool tree_binary_nonnegative_warnv_p (enum tree_code, tree, tree, tree,
68e57f04 RS	142	bool *, int);
68e57f04 RS	143	extern bool tree_single_nonnegative_warnv_p (tree, bool *, int);
1d9da71f RS	144	extern bool tree_call_nonnegative_warnv_p (tree, combined_fn, tree, tree,
1d9da71f RS	145	bool *, int);
d8a2d370	146
67dbe582 RS	147	extern bool integer_valued_real_unary_p (tree_code, tree, int);
67dbe582 RS	148	extern bool integer_valued_real_binary_p (tree_code, tree, tree, int);
1d9da71f	149	extern bool integer_valued_real_call_p (combined_fn, tree, tree, int);
67dbe582 RS	150	extern bool integer_valued_real_single_p (tree, int);
	151	extern bool integer_valued_real_p (tree, int = 0);
	152
d8a2d370 DN	153	extern bool fold_real_zero_addition_p (const_tree, const_tree, int);
	154	extern tree combine_comparisons (location_t, enum tree_code, enum tree_code,
	155	enum tree_code, tree, tree, tree);
	156	extern void debug_fold_checksum (const_tree);
	157	extern bool may_negate_without_overflow_p (const_tree);
	158	#define round_up(T,N) round_up_loc (UNKNOWN_LOCATION, T, N)
605f12f4	159	extern tree round_up_loc (location_t, tree, unsigned int);
d8a2d370 DN	160	#define round_down(T,N) round_down_loc (UNKNOWN_LOCATION, T, N)
d8a2d370 DN	161	extern tree round_down_loc (location_t, tree, int);
36fd6408	162	extern tree size_int_kind (poly_int64, enum size_type_kind);
d8a2d370 DN	163	#define size_binop(CODE,T1,T2)\
	164	size_binop_loc (UNKNOWN_LOCATION, CODE, T1, T2)
	165	extern tree size_binop_loc (location_t, enum tree_code, tree, tree);
	166	#define size_diffop(T1,T2)\
	167	size_diffop_loc (UNKNOWN_LOCATION, T1, T2)
	168	extern tree size_diffop_loc (location_t, tree, tree);
	169
	170	/* Return an expr equal to X but certainly not valid as an lvalue. */
	171	#define non_lvalue(T) non_lvalue_loc (UNKNOWN_LOCATION, T)
	172	extern tree non_lvalue_loc (location_t, tree);
	173
e36c1cfe	174	extern bool tree_expr_nonzero_p (tree);
d8a2d370	175	extern bool tree_expr_nonnegative_p (tree);
68e57f04	176	extern bool tree_expr_nonnegative_warnv_p (tree, bool *, int = 0);
d8a2d370 DN	177	extern tree make_range (tree, int , tree , tree , bool );
	178	extern tree make_range_step (location_t, enum tree_code, tree, tree, tree,
	179	tree , tree , int , bool );
8d1628eb	180	extern tree range_check_type (tree);
d8a2d370 DN	181	extern tree build_range_check (location_t, tree, tree, int, tree, tree);
	182	extern bool merge_ranges (int , tree , tree *, int, tree, tree, int,
	183	tree, tree);
a7f24614 RB	184	extern tree sign_bit_p (tree, const_tree);
a7f24614 RB	185	extern tree exact_inverse (tree, tree);
20b8d734	186	extern bool expr_not_equal_to (tree t, const wide_int &);
8006f46b RB	187	extern tree const_unop (enum tree_code, tree, tree);
8006f46b RB	188	extern tree const_binop (enum tree_code, tree, tree, tree);
1d9da71f	189	extern bool negate_mathfn_p (combined_fn);
d01b568a	190	extern const char c_getstr (tree, unsigned HOST_WIDE_INT = NULL);
ba6557e2	191	extern wide_int tree_nonzero_bits (const_tree);
d8a2d370	192
40e23961 MC	193	/* Return OFF converted to a pointer offset type suitable as offset for
	194	POINTER_PLUS_EXPR. Use location LOC for this conversion. */
	195	extern tree convert_to_ptrofftype_loc (location_t loc, tree off);
	196
	197	#define convert_to_ptrofftype(t) convert_to_ptrofftype_loc (UNKNOWN_LOCATION, t)
	198
	199	/* Build and fold a POINTER_PLUS_EXPR at LOC offsetting PTR by OFF. */
	200	extern tree fold_build_pointer_plus_loc (location_t loc, tree ptr, tree off);
	201
	202	#define fold_build_pointer_plus(p,o) \
	203	fold_build_pointer_plus_loc (UNKNOWN_LOCATION, p, o)
	204
	205	/* Build and fold a POINTER_PLUS_EXPR at LOC offsetting PTR by OFF. */
	206	extern tree fold_build_pointer_plus_hwi_loc (location_t loc, tree ptr, HOST_WIDE_INT off);
	207
	208	#define fold_build_pointer_plus_hwi(p,o) \
	209	fold_build_pointer_plus_hwi_loc (UNKNOWN_LOCATION, p, o)
d8a2d370	210	#endif // GCC_FOLD_CONST_H