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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.2.2/] [gcc/] [value-prof.h] - Rev 192
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/* Definitions for transformations based on profile information for values. Copyright (C) 2003, 2004, 2005, 2007 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_SINGLE_VALUE, /* Tries to identify the value that is (almost) always constant. */ HIST_TYPE_CONST_DELTA /* Tries to identify the (almost) always constant difference between two evaluations of a value. */ }; #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. */ tree 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. */ 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; DEF_VEC_P(histogram_value); DEF_VEC_ALLOC_P(histogram_value,heap); typedef VEC(histogram_value,heap) *histogram_values; /* Hooks registration. */ extern void tree_register_value_prof_hooks (void); /* IR-independent entry points. */ extern void find_values_to_profile (histogram_values *); extern bool value_profile_transformations (void); /* External declarations for edge-based profiling. */ struct profile_hooks { /* Insert code to initialize edge profiler. */ void (*init_edge_profiler) (void); /* Insert code to increment an edge count. */ void (*gen_edge_profiler) (int, edge); /* Insert code to increment the interval histogram counter. */ void (*gen_interval_profiler) (histogram_value, unsigned, unsigned); /* Insert code to increment the power of two histogram counter. */ void (*gen_pow2_profiler) (histogram_value, unsigned, unsigned); /* Insert code to find the most common value. */ void (*gen_one_value_profiler) (histogram_value, unsigned, unsigned); /* Insert code to find the most common value of a difference between two evaluations of an expression. */ void (*gen_const_delta_profiler) (histogram_value, unsigned, unsigned); }; /* In profile.c. */ extern void init_branch_prob (void); extern void branch_prob (void); extern void end_branch_prob (void); extern void tree_register_profile_hooks (void); /* In tree-profile.c. */ extern struct profile_hooks tree_profile_hooks; #endif /* GCC_VALUE_PROF_H */
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