nsz Git - libfirm/blob - ir/be/beprofile.c

   1 /** vim: set sw=4 ts=4:
   2  * @file   beprofile.c
   3  * @date   2006-04-06
   4  * @author Adam M. Szalkowski
   5  * @cvs-id $Id$
   6  *
   7  * Code instrumentation and execution count profiling
   8  *
   9  * Copyright (C) 2006 Universitaet Karlsruhe
  10  * Released under the GPL
  11  */
  12 #ifdef HAVE_CONFIG_H
  13 #include "config.h"
  14 #endif
  15
  16 #include <math.h>
  17
  18 #include "hashptr.h"
  19 #include "debug.h"
  20 #include "obst.h"
  21 #include "set.h"
  22 #include "list.h"
  23 #include "pmap.h"
  24
  25 #include "entity.h"
  26 #include "irprintf.h"
  27 #include "irgwalk.h"
  28 #include "irdump_t.h"
  29 #include "irnode_t.h"
  30 #include "ircons_t.h"
  31 #include "irloop_t.h"
  32 #include "iredges.h"
  33 #include "execfreq.h"
  34 #include "irvrfy.h"
  35 #include "type.h"
  36 #include "entity.h"
  37
  38 #include "be_t.h"
  39 #include "belive_t.h"
  40 #include "besched_t.h"
  41 #include "beirgmod.h"
  42 #include "bearch.h"
  43 #include "beabi.h"
  44 #include "benode_t.h"
  45 #include "beutil.h"
  46 #include "ircons.h"
  47
  48 #include "bechordal_t.h"
  49
  50 #ifdef WITH_LIBCORE
  51 #include <libcore/lc_opts.h>
  52 #include <libcore/lc_opts_enum.h>
  53 #endif /* WITH_LIBCORE */
  54
  55 typedef struct _block_id_walker_data {
  56         tarval        **array;
  57         unsigned int    id;
  58         ir_node *symconst;
  59 } block_id_walker_data;
  60
  61 static void
  62 block_counter(ir_node * bb, void * data)
  63 {
  64         unsigned int  *count = data;
  65         *count = *count + 1;
  66 }
  67
  68 static unsigned int
  69 count_blocks(ir_graph * irg)
  70 {
  71         unsigned int count = 0;
  72
  73         irg_block_walk_graph(irg, block_counter, NULL, &count);
  74         return count;
  75 }
  76
  77 /**
  78  * Instrument a block with code needed for profiling
  79  */
  80 static void
  81 instrument_block(ir_node * bb, ir_node * address, unsigned int id)
  82 {
  83         ir_graph *irg = get_irn_irg(bb);
  84         ir_node *start_block = get_irg_start_block(irg);
  85         ir_node  *load, *store, *offset, *add, *projm, *proji;
  86         ir_node *cnst;
  87
  88         if(bb == start_block || bb == get_irg_end_block(irg))
  89                 return;
  90
  91         cnst = new_r_Const_long(irg, start_block, mode_Iu, get_mode_size_bytes(mode_Iu) * id);
  92         offset = new_r_Add(irg, bb, address, cnst, mode_P);
  93         load = new_r_Load(irg, bb, new_NoMem(), offset, mode_Iu);
  94         projm = new_r_Proj(irg, bb, load, mode_M, pn_Load_M);
  95         proji = new_r_Proj(irg, bb, load, mode_Iu, pn_Load_res);
  96         cnst =  new_r_Const_long(irg, start_block, mode_Iu, 1);
  97         add = new_r_Add(irg, bb, proji, cnst, mode_Iu);
  98         store = new_r_Store(irg, bb, projm, offset, add);
  99         projm = new_r_Proj(irg, bb, store, mode_M, pn_Store_M);
 100         keep_alive(projm);
 101 }
 102
 103 /**
 104  * Generates a new irg which calls the initializer
 105  */
 106 static ir_graph *
 107 gen_initializer_irg(entity * bblock_id, entity * bblock_counts, int n_blocks)
 108 {
 109         ir_node *start_block;
 110
 111         ir_node   *ins[3];
 112         ident     *name = new_id_from_str("__firmprof_initializer");
 113         entity    *ent = new_entity(get_glob_type(), name, new_type_method(name, 0, 0));
 114         ir_node   *ret, *call, *symconst;
 115         symconst_symbol sym;
 116
 117         ident     *init_name = new_id_from_str("__init_firmprof");
 118         ir_type   *init_type = new_type_method(init_name, 3, 0);
 119         ir_type   *uint, *uintptr;
 120         entity    *init_ent;
 121         ir_graph  *irg;
 122         ir_node   *bb;
 123
 124         uint    = new_type_primitive(new_id_from_str("__uint"), mode_Iu);
 125         uintptr = new_type_pointer(new_id_from_str("__uintptr"), uint, mode_P);
 126
 127         set_method_param_type(init_type, 0, uintptr);
 128         set_method_param_type(init_type, 1, uintptr);
 129         set_method_param_type(init_type, 2, uint);
 130         init_ent = new_entity(get_glob_type(), init_name, init_type);
 131
 132         irg = new_ir_graph(ent, 0);
 133         set_current_ir_graph(irg);
 134
 135         bb = get_cur_block();
 136
 137         start_block = get_irg_start_block(irg);
 138
 139         sym.entity_p = init_ent;
 140         symconst     = new_r_SymConst(irg, start_block, sym, symconst_addr_ent);
 141
 142         sym.entity_p = bblock_id;
 143         ins[0] = new_r_SymConst(irg, start_block, sym, symconst_addr_ent);
 144         sym.entity_p = bblock_counts;
 145         ins[1] = new_r_SymConst(irg, start_block, sym, symconst_addr_ent);
 146         ins[2] = new_r_Const_long(irg, start_block, mode_Iu, n_blocks);
 147
 148         call = new_r_Call( irg,
 149                         bb,                                                     //ir_node *     block,
 150                         get_irg_initial_mem(irg),       //ir_node *     store,
 151                         symconst,                                       //ir_node *     callee,
 152                         3,                                                      //int   arity,
 153                         ins,                                            //ir_node **    in,
 154                         init_type                                       //ir_type *     tp
 155                         );
 156
 157         ret = new_r_Return ( irg,
 158                         bb,                                                                             //ir_node *     block,
 159                         new_r_Proj(irg, bb, call, mode_M, pn_Call_M_regular),   //ir_node *     store,
 160                         0,                                                                              //int   arity,
 161                         NULL                                                                    //ir_node **    in
 162                         );
 163
 164         mature_immBlock(bb);
 165
 166         add_immBlock_pred(get_irg_end_block(irg), ret);
 167         mature_immBlock(get_irg_end_block(irg));
 168
 169         irg_finalize_cons(irg);
 170
 171         return irg;
 172 }
 173
 174 static void
 175 block_id_walker(ir_node * bb, void * data)
 176 {
 177         block_id_walker_data *wd = data;
 178
 179         wd->array[wd->id] = new_tarval_from_long(get_irn_node_nr(bb), mode_Iu);
 180         instrument_block(bb, wd->symconst, wd->id);
 181         ++wd->id;
 182 }
 183
 184 ir_graph *
 185 be_profile_instrument(void)
 186 {
 187         ir_graph *const_irg = get_const_code_irg();
 188         ir_node *const_block = get_irg_start_block(const_irg);
 189         int            n, i;
 190         unsigned int   n_blocks = 0;
 191         entity     *bblock_id, *bblock_counts, *bblock_count;
 192         ir_type       *array_type, *integer_type;
 193         tarval       **tarval_array;
 194
 195         block_id_walker_data  wd;
 196         symconst_symbol sym;
 197
 198         integer_type = new_type_primitive(new_id_from_str("__uint"), mode_Iu);
 199         array_type = new_type_array(new_id_from_str("__block_info_array"), 1, integer_type);
 200         set_array_bounds_int(array_type, 0, 0, n_blocks);
 201         bblock_id = new_entity(get_glob_type(), new_id_from_str("__BLOCK_IDS"), array_type);
 202         set_entity_variability(bblock_id, variability_initialized);
 203         bblock_counts = new_entity(get_glob_type(), new_id_from_str("__BLOCK_COUNTS"), array_type);
 204         set_entity_variability(bblock_counts, variability_initialized);
 205         bblock_count = new_entity(get_glob_type(), new_id_from_str("__N_BLOCKS"), integer_type);
 206         set_entity_variability(bblock_count, variability_initialized);
 207
 208         for (n = get_irp_n_irgs()-1; n>=0; --n) {
 209                 ir_graph      *irg = get_irp_irg(n);
 210
 211                 n_blocks += count_blocks(irg);
 212         }
 213
 214         /* initialize count array */
 215         tarval_array = alloca(sizeof(tarval_array[0]) * n_blocks);
 216         for(i = 0; i < n_blocks; ++i) {
 217                 tarval_array[i] = get_tarval_null(mode_Iu);
 218         }
 219         set_array_entity_values(bblock_counts, tarval_array, n_blocks);
 220
 221         /* initialize the block count entity */
 222         set_atomic_ent_value(bblock_count, new_r_Const_long(const_irg, const_block, mode_Iu, n_blocks));
 223
 224         /* generate a symbolic constant pointing to the count array */
 225         sym.entity_p = bblock_count;
 226
 227         /* initialize block id array and instrument blocks */
 228         wd.array = tarval_array;
 229         wd.id = 0;
 230         for (n = get_irp_n_irgs()-1; n>=0; --n) {
 231                 ir_graph      *irg = get_irp_irg(n);
 232
 233                 wd.symconst = new_r_SymConst(irg, get_irg_start_block(irg), sym, symconst_addr_ent);
 234
 235                 irg_block_walk_graph(irg, block_id_walker, NULL, &wd);
 236         }
 237         set_array_entity_values(bblock_id, tarval_array, n_blocks);
 238
 239         return gen_initializer_irg(bblock_id, bblock_counts, n_blocks);
 240 }
 241
 242
 243 void
 244 be_profile_read(void)
 245 {
 246
 247 }