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/* 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
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
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
<>. */
/* 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 MODIFIED_NORETURN_CALLS(fun) (fun)->gimple_df->modified_noreturn_calls
#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,
/* 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 */