079a182e02
* expr.c (emit_block_move_via_movmem, emit_block_move_via_libcall): Add variant handling histograms; add wrapper. (clear_storage_via_libcall): Export. (emit_block_move_hints): Break out from ...; add histograms. (emit_block_move): ... this one. (clear_storage_hints): Break out from ...; add histograms. (clear_storage): ... this one. (set_storage_via_memset): Handle histogram. * expr.h (emit_block_move_via_libcall, emit_block_move_hints): Declare. (clear_storage_hints, clear_storage_via_libcall): Declare. (set_storage_via_setmem): Update prototype. * doc/md.texi (movmem, setmem): Document new arguments. * value-prof.c (dump_histogram_value, tree_find_values_to_profile): Add new histograms. (stringop_block_profile): New global function. (tree_stringops_values_to_profile): Profile block size and alignment. * value-prof.h (enum hist_type): add HIST_TYPE_AVERAGE and HIST_TYPE_IOR. (struct profile_hooks): Add gen_average_profiler and gen_ior_profiler. (stringop_block_profile): Declare. * builtins.c: Include value-prof.h. (expand_builtin_memcpy, expand_builtin_memset): Pass block profile. * gcov-ui.h (GCOV_COUNTER_NAMES): Add new counter. (GCOV_COUNTER_AVERAGE, GCOV_COUNTER_IOR): New constants. (GCOV_COUNTERS, GCOV_LAST_VALUE_COUNTER): Update. * profile.c (instrument_values): Add new counters. * cfgexpand.c (expand_gimple_basic_block): Propagate histograms to calls. * tree-profile.c (tree_average_profiler_fn, tree_ior_profiler_fn): New. (tree_init_edge_profiler): Build new profilers. (tree_gen_average_profiler, tree_gen_ior_profiler): New. (pass_tree_profile): Add dump. (tree_profile_hooks): Update. * Makefile.in (LIBGCOV): Add new constants. * libgcov.c (__gcov_merge_ior, __gcov_average_profiler, __gcov_ior_profiler): New. * i386.md (movmem/setmem expanders): Add new optional arguments. From-SVN: r121270
135 lines
5.0 KiB
C
135 lines
5.0 KiB
C
/* Definitions for transformations based on profile information for values.
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Copyright (C) 2003, 2004, 2005 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 2, 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 COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA. */
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#ifndef GCC_VALUE_PROF_H
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#define GCC_VALUE_PROF_H
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/* Supported histogram types. */
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enum hist_type
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{
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HIST_TYPE_INTERVAL, /* Measures histogram of values inside a specified
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interval. */
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HIST_TYPE_POW2, /* Histogram of power of 2 values. */
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HIST_TYPE_SINGLE_VALUE, /* Tries to identify the value that is (almost)
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always constant. */
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HIST_TYPE_CONST_DELTA, /* Tries to identify the (almost) always constant
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difference between two evaluations of a value. */
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HIST_TYPE_INDIR_CALL, /* Tries to identify the function that is (almost)
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called in indirect call */
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HIST_TYPE_AVERAGE, /* Compute average value (sum of all values). */
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HIST_TYPE_IOR /* Used to compute expected alignment. */
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};
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#define COUNTER_FOR_HIST_TYPE(TYPE) ((int) (TYPE) + GCOV_FIRST_VALUE_COUNTER)
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#define HIST_TYPE_FOR_COUNTER(COUNTER) \
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((enum hist_type) ((COUNTER) - GCOV_FIRST_VALUE_COUNTER))
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/* The value to measure. */
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struct histogram_value_t
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{
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struct
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{
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tree value; /* The value to profile. */
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tree stmt; /* Insn containing the value. */
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gcov_type *counters; /* Pointer to first counter. */
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struct histogram_value_t *next; /* Linked list pointer. */
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} hvalue;
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enum hist_type type; /* Type of information to measure. */
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unsigned n_counters; /* Number of required counters. */
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union
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{
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struct
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{
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int int_start; /* First value in interval. */
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unsigned int steps; /* Number of values in it. */
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} intvl; /* Interval histogram data. */
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} hdata; /* Profiled information specific data. */
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};
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typedef struct histogram_value_t *histogram_value;
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DEF_VEC_P(histogram_value);
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DEF_VEC_ALLOC_P(histogram_value,heap);
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typedef VEC(histogram_value,heap) *histogram_values;
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/* Hooks registration. */
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extern void tree_register_value_prof_hooks (void);
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/* IR-independent entry points. */
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extern void find_values_to_profile (histogram_values *);
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extern bool value_profile_transformations (void);
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/* External declarations for edge-based profiling. */
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struct profile_hooks {
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/* Insert code to initialize edge profiler. */
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void (*init_edge_profiler) (void);
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/* Insert code to increment an edge count. */
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void (*gen_edge_profiler) (int, edge);
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/* Insert code to increment the interval histogram counter. */
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void (*gen_interval_profiler) (histogram_value, unsigned, unsigned);
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/* Insert code to increment the power of two histogram counter. */
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void (*gen_pow2_profiler) (histogram_value, unsigned, unsigned);
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/* Insert code to find the most common value. */
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void (*gen_one_value_profiler) (histogram_value, unsigned, unsigned);
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/* Insert code to find the most common value of a difference between two
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evaluations of an expression. */
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void (*gen_const_delta_profiler) (histogram_value, unsigned, unsigned);
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/* Insert code to find the most common indirect call */
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void (*gen_ic_profiler) (histogram_value, unsigned, unsigned);
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/* Insert code to find the average value of an expression. */
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void (*gen_average_profiler) (histogram_value, unsigned, unsigned);
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/* Insert code to ior value of an expression. */
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void (*gen_ior_profiler) (histogram_value, unsigned, unsigned);
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};
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histogram_value gimple_histogram_value (struct function *, tree);
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histogram_value gimple_histogram_value_of_type (struct function *, tree, enum hist_type);
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void gimple_add_histogram_value (struct function *, tree, histogram_value);
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void gimple_remove_histogram_value (struct function *, tree, histogram_value);
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void dump_histograms_for_stmt (struct function *, FILE *, tree);
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void gimple_remove_histogram_value (struct function *, tree, histogram_value);
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void gimple_remove_stmt_histograms (struct function *, tree);
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void gimple_duplicate_stmt_histograms (struct function *, tree, struct function *, tree);
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void verify_histograms (void);
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void free_histograms (void);
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void stringop_block_profile (tree, unsigned int *, HOST_WIDE_INT *);
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/* In profile.c. */
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extern void init_branch_prob (void);
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extern void branch_prob (void);
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extern void end_branch_prob (void);
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extern void tree_register_profile_hooks (void);
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/* In tree-profile.c. */
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extern struct profile_hooks tree_profile_hooks;
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#endif /* GCC_VALUE_PROF_H */
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