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
  46 #include "bechordal_t.h"
  47
  48 #ifdef WITH_LIBCORE
  49 #include <libcore/lc_opts.h>
  50 #include <libcore/lc_opts_enum.h>
  51 #endif /* WITH_LIBCORE */
  52
  53 typedef struct _block_id_walker_data {
  54         tarval        **array;
  55         unsigned int    id;
  56         ir_node  *symconst;
  57 } block_id_walker_data;
  58
  59 static void
  60 block_counter(ir_node * bb, void * data)
  61 {
  62         unsigned int  *count = data;
  63         *count = *count + 1;
  64 }
  65
  66 static unsigned int
  67 count_blocks(ir_graph * irg)
  68 {
  69         unsigned int count = 0;
  70
  71         irg_block_walk_graph(irg, block_counter, NULL, &count);
  72         return count;
  73 }
  74
  75 /**
  76  * Instrument a block with code needed for profiling
  77  */
  78 static void
  79 instrument_block(ir_node * bb, ir_node * address, unsigned int id)
  80 {
  81         ir_node  *load, *store, *offset, *add, *projm, *proji;
  82
  83         offset = new_r_Add(get_irn_irg(bb), bb, address, new_Const_long(mode_Is, get_mode_size_bytes(mode_Iu)*id), mode_P);
  84         load = new_r_Load(get_irn_irg(bb), bb, new_NoMem(), offset, mode_Iu);
  85         projm = new_r_Proj(get_irn_irg(bb), bb, load, mode_M, 0);
  86         proji = new_r_Proj(get_irn_irg(bb), bb, load, mode_Iu, 2);
  87         add = new_r_Add(get_irn_irg(bb), bb, proji, new_Const_long(mode_Iu, 1), mode_Iu);
  88         store = new_r_Store(get_irn_irg(bb), bb, projm, offset, add);
  89         keep_alive(new_r_Proj(get_irn_irg(bb), bb, load, mode_M, 0));
  90 }
  91
  92 /**
  93  * Generates a new irg which calls the initializer
  94  */
  95 static ir_graph *
  96 gen_initializer_irg(entity * bblock_id, entity * bblock_counts, entity * bblock_count)
  97 {
  98         ir_node   *ins[3];
  99         ident     *name = new_id_from_str("__firmprof_initializer");
 100         entity    *ent = new_entity(get_glob_type(), name, new_type_method(name, 0, 0));
 101         ir_node   *ret, *call, *symconst;
 102         symconst_symbol sym;
 103
 104         ident     *init_name = new_id_from_str("__init_firmprof");
 105         ir_type   *init_type = new_type_method(init_name, 3, 0);
 106         ir_type   *uint, *uintptr;
 107
 108         uint = new_type_primitive(new_id_from_str("__uint"), mode_Iu);
 109         uintptr = new_type_pointer(new_id_from_str("__uintptr"), uint, mode_P);
 110
 111         set_method_param_type(init_type, 0, uintptr);
 112         set_method_param_type(init_type, 1, uintptr);
 113         set_method_param_type(init_type, 2, uint);
 114         entity    *init_ent = new_entity(get_glob_type(), init_name, init_type);
 115
 116         ir_graph *irg = new_ir_graph(ent, 0);
 117         set_current_ir_graph(irg);
 118
 119         ir_node *bb = get_cur_block();
 120
 121         sym.entity_p = init_ent;
 122         symconst = new_SymConst(sym, symconst_addr_ent);
 123
 124         sym.entity_p = bblock_id;
 125         ins[0] = new_SymConst(sym, symconst_addr_ent);
 126         sym.entity_p = bblock_counts;
 127         ins[1] = new_SymConst(sym, symconst_addr_ent);
 128         sym.entity_p = bblock_count;
 129         ins[2] = new_SymConst(sym, symconst_addr_ent);
 130
 131         call = new_r_Call( irg,
 132                         bb,                                                     //ir_node *     block,
 133                         get_irg_initial_mem(irg),       //ir_node *     store,
 134                         symconst,                                       //ir_node *     callee,
 135                         3,                                                      //int   arity,
 136                         ins,                                            //ir_node **    in,
 137                         init_type                                       //ir_type *     tp
 138                         );
 139
 140         ret = new_r_Return ( irg,
 141                         bb,                                                                             //ir_node *     block,
 142                         new_r_Proj(irg, bb, call, mode_M, 0),   //ir_node *     store,
 143                         0,                                                                              //int   arity,
 144                         NULL                                                                    //ir_node **    in
 145                         );
 146
 147         mature_immBlock(bb);
 148
 149         add_immBlock_pred(get_irg_end_block(irg), ret);
 150         mature_immBlock(get_irg_end_block(irg));
 151
 152         return irg;
 153 }
 154
 155 static void
 156 block_id_walker(ir_node * bb, void * data)
 157 {
 158         block_id_walker_data *wd = data;
 159
 160         wd->array[wd->id] = new_tarval_from_long(get_irn_node_nr(bb), mode_Iu);
 161         instrument_block(bb, wd->symconst, wd->id);
 162         ++wd->id;
 163 }
 164
 165 void
 166 be_profile_instrument(void)
 167 {
 168         int            n, i;
 169         unsigned int   n_blocks = 0;
 170         entity     *bblock_id, *bblock_counts, *bblock_count;
 171         ir_type       *array_type, *integer_type;
 172         tarval       **tarval_array;
 173
 174         block_id_walker_data  wd;
 175         symconst_symbol       sym;
 176
 177         integer_type = new_type_primitive(new_id_from_str("__uint"), mode_Iu);
 178         array_type = new_type_array(new_id_from_str("__block_info_array"), 1, integer_type);
 179         set_array_bounds_int(array_type, 0, 0, n_blocks);
 180         bblock_id = new_entity(get_glob_type(), new_id_from_str("__BLOCK_IDS"), array_type);
 181         bblock_counts = new_entity(get_glob_type(), new_id_from_str("__BLOCK_COUNTS"), array_type);
 182         bblock_count = new_entity(get_glob_type(), new_id_from_str("__N_BLOCKS"), integer_type);
 183
 184         for (n = get_irp_n_irgs()-1; n>=0; --n) {
 185                 ir_graph      *irg = get_irp_irg(n);
 186
 187                 n_blocks += count_blocks(irg);
 188         }
 189
 190         /* initialize count array */
 191         tarval_array = alloca(sizeof(tarval_array[0]) * n_blocks);
 192         for(i = 0; i < n_blocks; ++i) {
 193                 tarval_array[i] = get_tarval_null(mode_Iu);
 194         }
 195         set_array_entity_values(bblock_counts, tarval_array, n_blocks);
 196
 197         /* initialize the block count entity */
 198         set_atomic_ent_value(bblock_count, new_Const_long(mode_Iu, n_blocks));
 199
 200         /* generate a symbolic constant pointing to the count array */
 201         sym.entity_p = bblock_count;
 202         wd.symconst = new_SymConst(sym, symconst_addr_ent);
 203
 204         /* initialize block id array and instrument blocks */
 205         wd.array = tarval_array;
 206         wd.id = 0;
 207         for (n = get_irp_n_irgs()-1; n>=0; --n) {
 208                 ir_graph      *irg = get_irp_irg(n);
 209
 210                 irg_block_walk_graph(irg, block_id_walker, NULL, &wd);
 211         }
 212         set_array_entity_values(bblock_id, tarval_array, n_blocks);
 213
 214         gen_initializer_irg(bblock_id, bblock_counts, bblock_count);
 215 }
 216
 217
 218 void
 219 be_profile_read(void)
 220 {
 221
 222 }