gcc/fold-const.h

   1 /* Fold a constant sub-tree into a single node for C-compiler
   2    Copyright (C) 1987-2014 Free Software Foundation, Inc.
   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.  */
  28 extern int native_encode_expr (const_tree, unsigned char *, int, int off = -1,
  29                                bool reverse = false);
  30 extern tree native_interpret_expr (tree, const unsigned char *, int);
  31
  32 /* Flip storage order at compile time.  */
  33 extern tree fold_flip_storage_order (tree);
  34
  35 /* Fold constants as much as possible in an expression.
  36    Returns the simplified expression.
  37    Acts only on the top level of the expression;
  38    if the argument itself cannot be simplified, its
  39    subexpressions are not changed.  */
  40
  41 extern tree fold (tree);
  42 #define fold_unary(CODE,T1,T2)\
  43    fold_unary_loc (UNKNOWN_LOCATION, CODE, T1, T2)
  44 extern tree fold_unary_loc (location_t, enum tree_code, tree, tree);
  45 #define fold_unary_ignore_overflow(CODE,T1,T2)\
  46    fold_unary_ignore_overflow_loc (UNKNOWN_LOCATION, CODE, T1, T2)
  47 extern tree fold_unary_ignore_overflow_loc (location_t, enum tree_code, tree, tree);
  48 #define fold_binary(CODE,T1,T2,T3)\
  49    fold_binary_loc (UNKNOWN_LOCATION, CODE, T1, T2, T3)
  50 extern tree fold_binary_loc (location_t, enum tree_code, tree, tree, tree);
  51 #define fold_ternary(CODE,T1,T2,T3,T4)\
  52    fold_ternary_loc (UNKNOWN_LOCATION, CODE, T1, T2, T3, T4)
  53 extern tree fold_ternary_loc (location_t, enum tree_code, tree, tree, tree, tree);
  54 #define fold_build1(c,t1,t2)\
  55    fold_build1_stat_loc (UNKNOWN_LOCATION, c, t1, t2 MEM_STAT_INFO)
  56 #define fold_build1_loc(l,c,t1,t2)\
  57    fold_build1_stat_loc (l, c, t1, t2 MEM_STAT_INFO)
  58 extern tree fold_build1_stat_loc (location_t, enum tree_code, tree,
  59                                   tree MEM_STAT_DECL);
  60 #define fold_build2(c,t1,t2,t3)\
  61    fold_build2_stat_loc (UNKNOWN_LOCATION, c, t1, t2, t3 MEM_STAT_INFO)
  62 #define fold_build2_loc(l,c,t1,t2,t3)\
  63    fold_build2_stat_loc (l, c, t1, t2, t3 MEM_STAT_INFO)
  64 extern tree fold_build2_stat_loc (location_t, enum tree_code, tree, tree,
  65                                   tree MEM_STAT_DECL);
  66 #define fold_build3(c,t1,t2,t3,t4)\
  67    fold_build3_stat_loc (UNKNOWN_LOCATION, c, t1, t2, t3, t4 MEM_STAT_INFO)
  68 #define fold_build3_loc(l,c,t1,t2,t3,t4)\
  69    fold_build3_stat_loc (l, c, t1, t2, t3, t4 MEM_STAT_INFO)
  70 extern tree fold_build3_stat_loc (location_t, enum tree_code, tree, tree, tree,
  71                                   tree MEM_STAT_DECL);
  72 extern tree fold_build1_initializer_loc (location_t, enum tree_code, tree, tree);
  73 extern tree fold_build2_initializer_loc (location_t, enum tree_code, tree, tree, tree);
  74 #define fold_build_call_array(T1,T2,N,T4)\
  75    fold_build_call_array_loc (UNKNOWN_LOCATION, T1, T2, N, T4)
  76 extern tree fold_build_call_array_loc (location_t, tree, tree, int, tree *);
  77 #define fold_build_call_array_initializer(T1,T2,N,T4)\
  78    fold_build_call_array_initializer_loc (UNKNOWN_LOCATION, T1, T2, N, T4)
  79 extern tree fold_build_call_array_initializer_loc (location_t, tree, tree, int, tree *);
  80 extern bool fold_convertible_p (const_tree, const_tree);
  81 #define fold_convert(T1,T2)\
  82    fold_convert_loc (UNKNOWN_LOCATION, T1, T2)
  83 extern tree fold_convert_loc (location_t, tree, tree);
  84 extern tree fold_single_bit_test (location_t, enum tree_code, tree, tree, tree);
  85 extern tree fold_ignored_result (tree);
  86 extern tree fold_abs_const (tree, tree);
  87 extern tree fold_indirect_ref_1 (location_t, tree, tree);
  88 extern void fold_defer_overflow_warnings (void);
  89 extern void fold_undefer_overflow_warnings (bool, const_gimple, int);
  90 extern void fold_undefer_and_ignore_overflow_warnings (void);
  91 extern bool fold_deferring_overflow_warnings_p (void);
  92 extern int operand_equal_p (const_tree, const_tree, unsigned int);
  93 extern int multiple_of_p (tree, const_tree, const_tree);
  94 #define omit_one_operand(T1,T2,T3)\
  95    omit_one_operand_loc (UNKNOWN_LOCATION, T1, T2, T3)
  96 extern tree omit_one_operand_loc (location_t, tree, tree, tree);
  97 #define omit_two_operands(T1,T2,T3,T4)\
  98    omit_two_operands_loc (UNKNOWN_LOCATION, T1, T2, T3, T4)
  99 extern tree omit_two_operands_loc (location_t, tree, tree, tree, tree);
 100 #define invert_truthvalue(T)\
 101    invert_truthvalue_loc (UNKNOWN_LOCATION, T)
 102 extern tree invert_truthvalue_loc (location_t, tree);
 103 extern tree fold_unary_to_constant (enum tree_code, tree, tree);
 104 extern tree fold_binary_to_constant (enum tree_code, tree, tree, tree);
 105 extern tree fold_read_from_constant_string (tree);
 106 extern tree int_const_binop (enum tree_code, const_tree, const_tree);
 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);
 114 extern tree fold_strip_sign_ops (tree);
 115 #define build_fold_indirect_ref(T)\
 116         build_fold_indirect_ref_loc (UNKNOWN_LOCATION, T)
 117 extern tree build_fold_indirect_ref_loc (location_t, tree);
 118 #define fold_indirect_ref(T)\
 119         fold_indirect_ref_loc (UNKNOWN_LOCATION, T)
 120 extern tree fold_indirect_ref_loc (location_t, tree);
 121 extern tree build_simple_mem_ref_loc (location_t, tree);
 122 #define build_simple_mem_ref(T)\
 123         build_simple_mem_ref_loc (UNKNOWN_LOCATION, T)
 124 extern offset_int mem_ref_offset (const_tree);
 125 extern tree build_invariant_address (tree, tree, HOST_WIDE_INT);
 126 extern tree constant_boolean_node (bool, tree);
 127 extern tree div_if_zero_remainder (const_tree, const_tree);
 128
 129 extern bool tree_swap_operands_p (const_tree, const_tree, bool);
 130 extern enum tree_code swap_tree_comparison (enum tree_code);
 131
 132 extern bool ptr_difference_const (tree, tree, HOST_WIDE_INT *);
 133 extern enum tree_code invert_tree_comparison (enum tree_code, bool);
 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 *);
 139 extern bool tree_unary_nonnegative_warnv_p (enum tree_code, tree, tree, bool *);
 140 extern bool tree_binary_nonnegative_warnv_p (enum tree_code, tree, tree, tree,
 141                                              bool *);
 142 extern bool tree_single_nonnegative_warnv_p (tree t, bool *strict_overflow_p);
 143 extern bool tree_call_nonnegative_warnv_p (tree, tree, tree, tree, bool *);
 144
 145 extern bool fold_real_zero_addition_p (const_tree, const_tree, int);
 146 extern tree combine_comparisons (location_t, enum tree_code, enum tree_code,
 147                                  enum tree_code, tree, tree, tree);
 148 extern void debug_fold_checksum (const_tree);
 149 extern bool may_negate_without_overflow_p (const_tree);
 150 #define round_up(T,N) round_up_loc (UNKNOWN_LOCATION, T, N)
 151 extern tree round_up_loc (location_t, tree, unsigned int);
 152 #define round_down(T,N) round_down_loc (UNKNOWN_LOCATION, T, N)
 153 extern tree round_down_loc (location_t, tree, int);
 154 extern tree size_int_kind (HOST_WIDE_INT, enum size_type_kind);
 155 #define size_binop(CODE,T1,T2)\
 156    size_binop_loc (UNKNOWN_LOCATION, CODE, T1, T2)
 157 extern tree size_binop_loc (location_t, enum tree_code, tree, tree);
 158 #define size_diffop(T1,T2)\
 159    size_diffop_loc (UNKNOWN_LOCATION, T1, T2)
 160 extern tree size_diffop_loc (location_t, tree, tree);
 161
 162 /* Return an expr equal to X but certainly not valid as an lvalue.  */
 163 #define non_lvalue(T) non_lvalue_loc (UNKNOWN_LOCATION, T)
 164 extern tree non_lvalue_loc (location_t, tree);
 165
 166 extern bool tree_expr_nonnegative_p (tree);
 167 extern bool tree_expr_nonnegative_warnv_p (tree, bool *);
 168 extern tree make_range (tree, int *, tree *, tree *, bool *);
 169 extern tree make_range_step (location_t, enum tree_code, tree, tree, tree,
 170                              tree *, tree *, int *, bool *);
 171 extern tree build_range_check (location_t, tree, tree, int, tree, tree);
 172 extern bool merge_ranges (int *, tree *, tree *, int, tree, tree, int,
 173                           tree, tree);
 174
 175 #endif // GCC_FOLD_CONST_H