| /* SSA name expresssons routines |
| Copyright (C) 2013-2014 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_TREE_SSANAMES_H |
| #define GCC_TREE_SSANAMES_H |
| |
| /* Aliasing information for SSA_NAMEs representing pointer variables. */ |
| |
| struct GTY(()) ptr_info_def |
| { |
| /* The points-to solution. */ |
| struct pt_solution pt; |
| |
| /* Alignment and misalignment of the pointer in bytes. Together |
| align and misalign specify low known bits of the pointer. |
| ptr & (align - 1) == misalign. */ |
| |
| /* When known, this is the power-of-two byte alignment of the object this |
| pointer points into. This is usually DECL_ALIGN_UNIT for decls and |
| MALLOC_ABI_ALIGNMENT for allocated storage. When the alignment is not |
| known, it is zero. Do not access directly but use functions |
| get_ptr_info_alignment, set_ptr_info_alignment, |
| mark_ptr_info_alignment_unknown and similar. */ |
| unsigned int align; |
| |
| /* When alignment is known, the byte offset this pointer differs from the |
| above alignment. Access only through the same helper functions as align |
| above. */ |
| unsigned int misalign; |
| }; |
| |
| /* Value range information for SSA_NAMEs representing non-pointer variables. */ |
| |
| struct GTY (()) range_info_def { |
| /* Minimum for value range. */ |
| double_int min; |
| /* Maximum for value range. */ |
| double_int max; |
| /* Non-zero bits - bits not set are guaranteed to be always zero. */ |
| double_int nonzero_bits; |
| }; |
| |
| |
| #define SSANAMES(fun) (fun)->gimple_df->ssa_names |
| #define DEFAULT_DEFS(fun) (fun)->gimple_df->default_defs |
| |
| #define num_ssa_names (vec_safe_length (cfun->gimple_df->ssa_names)) |
| #define ssa_name(i) ((*cfun->gimple_df->ssa_names)[(i)]) |
| |
| |
| /* Type of value ranges. See value_range_d In tree-vrp.c for a |
| description of these types. */ |
| enum value_range_type { VR_UNDEFINED, VR_RANGE, VR_ANTI_RANGE, VR_VARYING }; |
| |
| /* Sets the value range to SSA. */ |
| extern void set_range_info (tree, enum value_range_type, double_int, |
| double_int); |
| /* Gets the value range from SSA. */ |
| extern enum value_range_type get_range_info (const_tree, double_int *, |
| double_int *); |
| extern void set_nonzero_bits (tree, double_int); |
| extern double_int get_nonzero_bits (const_tree); |
| extern void init_ssanames (struct function *, int); |
| extern void fini_ssanames (void); |
| extern void ssanames_print_statistics (void); |
| extern tree make_ssa_name_fn (struct function *, tree, gimple); |
| extern void release_ssa_name_fn (struct function *, tree); |
| extern bool get_ptr_info_alignment (struct ptr_info_def *, unsigned int *, |
| unsigned int *); |
| extern void mark_ptr_info_alignment_unknown (struct ptr_info_def *); |
| extern void set_ptr_info_alignment (struct ptr_info_def *, unsigned int, |
| unsigned int); |
| extern void adjust_ptr_info_misalignment (struct ptr_info_def *, |
| unsigned int); |
| extern struct ptr_info_def *get_ptr_info (tree); |
| |
| extern tree copy_ssa_name_fn (struct function *, tree, gimple); |
| extern void duplicate_ssa_name_ptr_info (tree, struct ptr_info_def *); |
| extern tree duplicate_ssa_name_fn (struct function *, tree, gimple); |
| extern void duplicate_ssa_name_range_info (tree, enum value_range_type, |
| struct range_info_def *); |
| extern void release_defs (gimple); |
| extern void replace_ssa_name_symbol (tree, tree); |
| |
| |
| /* Return an SSA_NAME node for variable VAR defined in statement STMT |
| in function cfun. */ |
| |
| static inline tree |
| make_ssa_name (tree var, gimple stmt) |
| { |
| return make_ssa_name_fn (cfun, var, stmt); |
| } |
| |
| /* Return an SSA_NAME node using the template SSA name NAME defined in |
| statement STMT in function cfun. */ |
| |
| static inline tree |
| copy_ssa_name (tree var, gimple stmt) |
| { |
| return copy_ssa_name_fn (cfun, var, stmt); |
| } |
| |
| /* Creates a duplicate of a SSA name NAME tobe defined by statement STMT |
| in function cfun. */ |
| |
| static inline tree |
| duplicate_ssa_name (tree var, gimple stmt) |
| { |
| return duplicate_ssa_name_fn (cfun, var, stmt); |
| } |
| |
| /* Release the SSA name NAME used in function cfun. */ |
| |
| static inline void |
| release_ssa_name (tree name) |
| { |
| release_ssa_name_fn (cfun, name); |
| } |
| |
| /* Return an anonymous SSA_NAME node for type TYPE defined in statement STMT |
| in function cfun. Arrange so that it uses NAME in dumps. */ |
| |
| static inline tree |
| make_temp_ssa_name (tree type, gimple stmt, const char *name) |
| { |
| tree ssa_name; |
| gcc_checking_assert (TYPE_P (type)); |
| ssa_name = make_ssa_name_fn (cfun, type, stmt); |
| SET_SSA_NAME_VAR_OR_IDENTIFIER (ssa_name, get_identifier (name)); |
| return ssa_name; |
| } |
| |
| |
| #endif /* GCC_TREE_SSANAMES_H */ |
