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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/value-prof.h')
-rw-r--r-- | gcc-4.2.1-5666.3/gcc/value-prof.h | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/value-prof.h b/gcc-4.2.1-5666.3/gcc/value-prof.h new file mode 100644 index 000000000..7695c03bb --- /dev/null +++ b/gcc-4.2.1-5666.3/gcc/value-prof.h @@ -0,0 +1,109 @@ +/* Definitions for transformations based on profile information for values. + Copyright (C) 2003, 2004, 2005 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 2, 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 COPYING. If not, write to the Free +Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301, USA. */ + +#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 */ + |