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/* Definitions for transformations based on profile information for values.
Copyright (C) 2003-2024 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_VALUE_PROF_H
#define GCC_VALUE_PROF_H
/* Supported histogram types. */
enum hist_type
{
HIST_TYPE_INTERVAL, /* Measures histogram of values inside a specified
interval. */
HIST_TYPE_POW2, /* Histogram of power of 2 values. */
HIST_TYPE_TOPN_VALUES, /* Tries to identify the N most common values. */
HIST_TYPE_INDIR_CALL, /* Tries to identify the function that is (almost)
called in indirect call */
HIST_TYPE_AVERAGE, /* Compute average value (sum of all values). */
HIST_TYPE_IOR, /* Used to compute expected alignment. */
HIST_TYPE_TIME_PROFILE, /* Used for time profile */
HIST_TYPE_MAX
};
#define COUNTER_FOR_HIST_TYPE(TYPE) ((int) (TYPE) + GCOV_FIRST_VALUE_COUNTER)
#define HIST_TYPE_FOR_COUNTER(COUNTER) \
((enum hist_type) ((COUNTER) - GCOV_FIRST_VALUE_COUNTER))
/* The value to measure. */
struct histogram_value_t
{
struct
{
tree value; /* The value to profile. */
gimple *stmt; /* Insn containing the value. */
gcov_type *counters; /* Pointer to first counter. */
struct histogram_value_t *next; /* Linked list pointer. */
} hvalue;
enum hist_type type; /* Type of information to measure. */
unsigned n_counters; /* Number of required counters. */
struct function *fun;
union
{
struct
{
int int_start; /* First value in interval. */
unsigned int steps; /* Number of values in it. */
} intvl; /* Interval histogram data. */
} hdata; /* Profiled information specific data. */
};
typedef struct histogram_value_t *histogram_value;
typedef const struct histogram_value_t *const_histogram_value;
typedef vec<histogram_value> histogram_values;
extern void gimple_find_values_to_profile (histogram_values *);
extern bool gimple_value_profile_transformations (void);
histogram_value gimple_alloc_histogram_value (struct function *, enum hist_type,
gimple *stmt = NULL,
tree value = NULL_TREE);
histogram_value gimple_histogram_value (struct function *, gimple *);
histogram_value gimple_histogram_value_of_type (struct function *, gimple *,
enum hist_type);
void gimple_add_histogram_value (struct function *, gimple *, histogram_value);
void dump_histograms_for_stmt (struct function *, FILE *, gimple *);
void gimple_remove_histogram_value (struct function *, gimple *, histogram_value);
void gimple_remove_stmt_histograms (struct function *, gimple *);
void gimple_duplicate_stmt_histograms (struct function *, gimple *,
struct function *, gimple *);
void gimple_move_stmt_histograms (struct function *, gimple *, gimple *);
void verify_histograms (void);
void free_histograms (function *);
void stringop_block_profile (gimple *, unsigned int *, HOST_WIDE_INT *);
gcall *gimple_ic (gcall *, struct cgraph_node *, profile_probability);
bool get_nth_most_common_value (gimple *stmt, const char *counter_type,
histogram_value hist, gcov_type *value,
gcov_type *count, gcov_type *all,
unsigned n = 0);
/* In tree-profile.cc. */
extern void gimple_init_gcov_profiler (void);
extern void gimple_gen_edge_profiler (int, edge);
extern void gimple_gen_interval_profiler (histogram_value, unsigned);
extern void gimple_gen_pow2_profiler (histogram_value, unsigned);
extern void gimple_gen_topn_values_profiler (histogram_value, unsigned);
extern void gimple_gen_ic_profiler (histogram_value, unsigned);
extern void gimple_gen_ic_func_profiler (void);
extern void gimple_gen_time_profiler (unsigned);
extern void gimple_gen_average_profiler (histogram_value, unsigned);
extern void gimple_gen_ior_profiler (histogram_value, unsigned);
extern void stream_out_histogram_value (struct output_block *, histogram_value);
extern void stream_in_histogram_value (class lto_input_block *, gimple *);
extern struct cgraph_node* find_func_by_profile_id (int func_id);
/* In profile.cc. */
extern void init_branch_prob (void);
extern void branch_prob (bool);
extern void read_thunk_profile (struct cgraph_node *);
extern void end_branch_prob (void);
#endif /* GCC_VALUE_PROF_H */
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