1/* SSA name expresssons routines 2 Copyright (C) 2013-2015 Free Software Foundation, Inc. 3 4This file is part of GCC. 5 6GCC is free software; you can redistribute it and/or modify it under 7the terms of the GNU General Public License as published by the Free 8Software Foundation; either version 3, or (at your option) any later 9version. 10 11GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12WARRANTY; without even the implied warranty of MERCHANTABILITY or 13FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 for more details. 15 16You should have received a copy of the GNU General Public License 17along with GCC; see the file COPYING3. If not see 18<http://www.gnu.org/licenses/>. */ 19 20#ifndef GCC_TREE_SSANAMES_H 21#define GCC_TREE_SSANAMES_H 22 23/* Aliasing information for SSA_NAMEs representing pointer variables. */ 24 25struct GTY(()) ptr_info_def 26{ 27 /* The points-to solution. */ 28 struct pt_solution pt; 29 30 /* Alignment and misalignment of the pointer in bytes. Together 31 align and misalign specify low known bits of the pointer. 32 ptr & (align - 1) == misalign. */ 33 34 /* When known, this is the power-of-two byte alignment of the object this 35 pointer points into. This is usually DECL_ALIGN_UNIT for decls and 36 MALLOC_ABI_ALIGNMENT for allocated storage. When the alignment is not 37 known, it is zero. Do not access directly but use functions 38 get_ptr_info_alignment, set_ptr_info_alignment, 39 mark_ptr_info_alignment_unknown and similar. */ 40 unsigned int align; 41 42 /* When alignment is known, the byte offset this pointer differs from the 43 above alignment. Access only through the same helper functions as align 44 above. */ 45 unsigned int misalign; 46}; 47 48/* Value range information for SSA_NAMEs representing non-pointer variables. */ 49 50struct GTY ((variable_size)) range_info_def { 51 /* Minimum, maximum and nonzero bits. */ 52 TRAILING_WIDE_INT_ACCESSOR (min, ints, 0) 53 TRAILING_WIDE_INT_ACCESSOR (max, ints, 1) 54 TRAILING_WIDE_INT_ACCESSOR (nonzero_bits, ints, 2) 55 trailing_wide_ints <3> ints; 56}; 57 58 59#define SSANAMES(fun) (fun)->gimple_df->ssa_names 60#define DEFAULT_DEFS(fun) (fun)->gimple_df->default_defs 61 62#define num_ssa_names (vec_safe_length (cfun->gimple_df->ssa_names)) 63#define ssa_name(i) ((*cfun->gimple_df->ssa_names)[(i)]) 64 65 66/* Type of value ranges. See value_range_d In tree-vrp.c for a 67 description of these types. */ 68enum value_range_type { VR_UNDEFINED, VR_RANGE, VR_ANTI_RANGE, VR_VARYING }; 69 70/* Sets the value range to SSA. */ 71extern void set_range_info (tree, enum value_range_type, const wide_int_ref &, 72 const wide_int_ref &); 73/* Gets the value range from SSA. */ 74extern enum value_range_type get_range_info (const_tree, wide_int *, 75 wide_int *); 76extern void set_nonzero_bits (tree, const wide_int_ref &); 77extern wide_int get_nonzero_bits (const_tree); 78extern void init_ssanames (struct function *, int); 79extern void fini_ssanames (void); 80extern void ssanames_print_statistics (void); 81extern tree make_ssa_name_fn (struct function *, tree, gimple); 82extern void release_ssa_name_fn (struct function *, tree); 83extern bool get_ptr_info_alignment (struct ptr_info_def *, unsigned int *, 84 unsigned int *); 85extern void mark_ptr_info_alignment_unknown (struct ptr_info_def *); 86extern void set_ptr_info_alignment (struct ptr_info_def *, unsigned int, 87 unsigned int); 88extern void adjust_ptr_info_misalignment (struct ptr_info_def *, 89 unsigned int); 90extern struct ptr_info_def *get_ptr_info (tree); 91 92extern tree copy_ssa_name_fn (struct function *, tree, gimple); 93extern void duplicate_ssa_name_ptr_info (tree, struct ptr_info_def *); 94extern tree duplicate_ssa_name_fn (struct function *, tree, gimple); 95extern void duplicate_ssa_name_range_info (tree, enum value_range_type, 96 struct range_info_def *); 97extern void reset_flow_sensitive_info (tree); 98extern void reset_flow_sensitive_info_in_bb (basic_block); 99extern void release_defs (gimple); 100extern void replace_ssa_name_symbol (tree, tree); 101 102 103/* Return an SSA_NAME node for variable VAR defined in statement STMT 104 in function cfun. */ 105 106static inline tree 107make_ssa_name (tree var, gimple stmt = NULL) 108{ 109 return make_ssa_name_fn (cfun, var, stmt); 110} 111 112/* Return an SSA_NAME node using the template SSA name NAME defined in 113 statement STMT in function cfun. */ 114 115static inline tree 116copy_ssa_name (tree var, gimple stmt = NULL) 117{ 118 return copy_ssa_name_fn (cfun, var, stmt); 119} 120 121/* Creates a duplicate of a SSA name NAME tobe defined by statement STMT 122 in function cfun. */ 123 124static inline tree 125duplicate_ssa_name (tree var, gimple stmt) 126{ 127 return duplicate_ssa_name_fn (cfun, var, stmt); 128} 129 130/* Release the SSA name NAME used in function cfun. */ 131 132static inline void 133release_ssa_name (tree name) 134{ 135 release_ssa_name_fn (cfun, name); 136} 137 138/* Return an anonymous SSA_NAME node for type TYPE defined in statement STMT 139 in function cfun. Arrange so that it uses NAME in dumps. */ 140 141static inline tree 142make_temp_ssa_name (tree type, gimple stmt, const char *name) 143{ 144 tree ssa_name; 145 gcc_checking_assert (TYPE_P (type)); 146 ssa_name = make_ssa_name_fn (cfun, type, stmt); 147 SET_SSA_NAME_VAR_OR_IDENTIFIER (ssa_name, get_identifier (name)); 148 return ssa_name; 149} 150 151 152#endif /* GCC_TREE_SSANAMES_H */ 153