| /* Fold a constant sub-tree into a single node for C-compiler |
| Copyright (C) 1987-2022 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 |
| |
| /* Nonzero if we are folding constants inside an initializer or a C++ |
| manifestly-constant-evaluated context; zero otherwise. |
| Should be used when folding in initializer enables additional |
| optimizations. */ |
| extern int folding_initializer; |
| /* Nonzero if we are folding C++ manifestly-constant-evaluated context; zero |
| otherwise. |
| Should be used when certain constructs shouldn't be optimized |
| during folding in that context. */ |
| extern bool folding_cxx_constexpr; |
| |
| /* Convert between trees and native memory representation. */ |
| extern int native_encode_expr (const_tree, unsigned char *, int, int off = -1); |
| extern int native_encode_initializer (tree, unsigned char *, int, |
| int off = -1, unsigned char * = nullptr); |
| extern tree native_interpret_expr (tree, const unsigned char *, int); |
| extern tree native_interpret_real (tree, const unsigned char *, int); |
| extern bool can_native_interpret_type_p (tree); |
| extern tree native_interpret_aggregate (tree, const unsigned char *, int, int); |
| extern tree find_bitfield_repr_type (int, int); |
| extern void shift_bytes_in_array_left (unsigned char *, unsigned int, |
| unsigned int); |
| extern void shift_bytes_in_array_right (unsigned char *, unsigned int, |
| unsigned 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); |
| extern tree fold_init (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 fold_binary_initializer_loc (location_t, tree_code, tree, tree, tree); |
| extern tree get_array_ctor_element_at_index (tree, offset_int, |
| unsigned * = NULL); |
| 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 bool operand_equal_p (const_tree, const_tree, unsigned int flags = 0); |
| extern int multiple_of_p (tree, const_tree, const_tree, bool = true); |
| #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 tree fold_read_from_vector (tree, poly_uint64); |
| #if GCC_VEC_PERN_INDICES_H |
| extern tree fold_vec_perm (tree, tree, tree, const vec_perm_indices &); |
| #endif |
| 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, 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 bool tree_expr_finite_p (const_tree); |
| extern bool tree_expr_infinite_p (const_tree); |
| extern bool tree_expr_maybe_infinite_p (const_tree); |
| extern bool tree_expr_signaling_nan_p (const_tree); |
| extern bool tree_expr_maybe_signaling_nan_p (const_tree); |
| extern bool tree_expr_nan_p (const_tree); |
| extern bool tree_expr_maybe_nan_p (const_tree); |
| extern bool tree_expr_maybe_real_minus_zero_p (const_tree); |
| 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 *getbyterep (tree, unsigned HOST_WIDE_INT *); |
| extern const char *c_getstr (tree); |
| extern wide_int tree_nonzero_bits (const_tree); |
| extern int address_compare (tree_code, tree, tree, tree, tree &, tree &, |
| poly_int64 &, poly_int64 &, bool); |
| extern tree ctor_single_nonzero_element (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) |
| |
| /* In gimple-fold.cc. */ |
| extern void clear_type_padding_in_mask (tree, unsigned char *); |
| extern bool clear_padding_type_may_have_padding_p (tree); |
| extern bool arith_overflowed_p (enum tree_code, const_tree, const_tree, |
| const_tree); |
| |
| /* Class used to compare gimple operands. */ |
| |
| class operand_compare |
| { |
| public: |
| /* Return true if two operands are equal. The flags fields can be used |
| to specify OEP flags described in tree-core.h. */ |
| virtual bool operand_equal_p (const_tree, const_tree, unsigned int flags); |
| |
| /* Generate a hash value for an expression. This can be used iteratively |
| by passing a previous result as the HSTATE argument. */ |
| virtual void hash_operand (const_tree, inchash::hash &, unsigned flags); |
| |
| protected: |
| /* Verify that when arguments (ARG0 and ARG1) are equal, then they have |
| an equal hash value. When the function knowns comparison return, |
| true is returned. Then RET is set to corresponding comparsion result. */ |
| bool verify_hash_value (const_tree arg0, const_tree arg1, unsigned int flags, |
| bool *ret); |
| }; |
| |
| #endif // GCC_FOLD_CONST_H |
