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