158 lines
5.5 KiB
C
158 lines
5.5 KiB
C
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/* SSA name expresssons routines
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Copyright (C) 2013-2019 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_TREE_SSANAMES_H
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#define GCC_TREE_SSANAMES_H
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/* Aliasing information for SSA_NAMEs representing pointer variables. */
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struct GTY(()) ptr_info_def
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{
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/* The points-to solution. */
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struct pt_solution pt;
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/* Alignment and misalignment of the pointer in bytes. Together
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align and misalign specify low known bits of the pointer.
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ptr & (align - 1) == misalign. */
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/* When known, this is the power-of-two byte alignment of the object this
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pointer points into. This is usually DECL_ALIGN_UNIT for decls and
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MALLOC_ABI_ALIGNMENT for allocated storage. When the alignment is not
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known, it is zero. Do not access directly but use functions
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get_ptr_info_alignment, set_ptr_info_alignment,
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mark_ptr_info_alignment_unknown and similar. */
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unsigned int align;
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/* When alignment is known, the byte offset this pointer differs from the
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above alignment. Access only through the same helper functions as align
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above. */
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unsigned int misalign;
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};
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/* Value range information for SSA_NAMEs representing non-pointer variables. */
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struct GTY ((variable_size)) range_info_def {
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/* Minimum, maximum and nonzero bits. */
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TRAILING_WIDE_INT_ACCESSOR (min, ints, 0)
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TRAILING_WIDE_INT_ACCESSOR (max, ints, 1)
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TRAILING_WIDE_INT_ACCESSOR (nonzero_bits, ints, 2)
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trailing_wide_ints <3> ints;
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};
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#define SSANAMES(fun) (fun)->gimple_df->ssa_names
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#define DEFAULT_DEFS(fun) (fun)->gimple_df->default_defs
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#define num_ssa_names (vec_safe_length (cfun->gimple_df->ssa_names))
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#define ssa_name(i) ((*cfun->gimple_df->ssa_names)[(i)])
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#define FOR_EACH_SSA_NAME(I, VAR, FN) \
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for (I = 1; SSANAMES (FN)->iterate (I, &VAR); ++I) \
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if (VAR)
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/* Sets the value range to SSA. */
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extern void set_range_info (tree, enum value_range_kind, const wide_int_ref &,
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const wide_int_ref &);
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extern void set_range_info (tree, const value_range_base &);
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/* Gets the value range from SSA. */
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extern enum value_range_kind get_range_info (const_tree, wide_int *,
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wide_int *);
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extern enum value_range_kind get_range_info (const_tree, value_range_base &);
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extern void set_nonzero_bits (tree, const wide_int_ref &);
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extern wide_int get_nonzero_bits (const_tree);
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extern bool ssa_name_has_boolean_range (tree);
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extern void init_ssanames (struct function *, int);
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extern void fini_ssanames (struct function *);
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extern void ssanames_print_statistics (void);
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extern tree make_ssa_name_fn (struct function *, tree, gimple *,
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unsigned int version = 0);
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extern void release_ssa_name_fn (struct function *, tree);
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extern bool get_ptr_info_alignment (struct ptr_info_def *, unsigned int *,
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unsigned int *);
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extern void mark_ptr_info_alignment_unknown (struct ptr_info_def *);
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extern void set_ptr_info_alignment (struct ptr_info_def *, unsigned int,
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unsigned int);
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extern void adjust_ptr_info_misalignment (struct ptr_info_def *, poly_uint64);
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extern struct ptr_info_def *get_ptr_info (tree);
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extern void set_ptr_nonnull (tree);
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extern bool get_ptr_nonnull (const_tree);
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extern tree copy_ssa_name_fn (struct function *, tree, gimple *);
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extern void duplicate_ssa_name_ptr_info (tree, struct ptr_info_def *);
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extern tree duplicate_ssa_name_fn (struct function *, tree, gimple *);
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extern void duplicate_ssa_name_range_info (tree, enum value_range_kind,
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struct range_info_def *);
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extern void reset_flow_sensitive_info (tree);
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extern void reset_flow_sensitive_info_in_bb (basic_block);
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extern void release_defs (gimple *);
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extern void replace_ssa_name_symbol (tree, tree);
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extern void flush_ssaname_freelist (void);
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/* Return an SSA_NAME node for variable VAR defined in statement STMT
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in function cfun. */
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static inline tree
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make_ssa_name (tree var, gimple *stmt = NULL)
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{
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return make_ssa_name_fn (cfun, var, stmt);
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}
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/* Return an SSA_NAME node using the template SSA name NAME defined in
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statement STMT in function cfun. */
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static inline tree
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copy_ssa_name (tree var, gimple *stmt = NULL)
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{
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return copy_ssa_name_fn (cfun, var, stmt);
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}
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/* Creates a duplicate of a SSA name NAME tobe defined by statement STMT
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in function cfun. */
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static inline tree
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duplicate_ssa_name (tree var, gimple *stmt)
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{
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return duplicate_ssa_name_fn (cfun, var, stmt);
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}
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/* Release the SSA name NAME used in function cfun. */
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static inline void
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release_ssa_name (tree name)
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{
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release_ssa_name_fn (cfun, name);
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}
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/* Return an anonymous SSA_NAME node for type TYPE defined in statement STMT
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in function cfun. Arrange so that it uses NAME in dumps. */
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static inline tree
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make_temp_ssa_name (tree type, gimple *stmt, const char *name)
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{
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tree ssa_name;
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gcc_checking_assert (TYPE_P (type));
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ssa_name = make_ssa_name_fn (cfun, type, stmt);
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SET_SSA_NAME_VAR_OR_IDENTIFIER (ssa_name, get_identifier (name));
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return ssa_name;
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}
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#endif /* GCC_TREE_SSANAMES_H */
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