-/** vim: set sw=4 ts=4:
- * @file beprofile.c
- * @date 2006-04-06
- * @author Adam M. Szalkowski
- * @cvs-id $Id$
+/*
+ * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved.
*
- * Code instrumentation and execution count profiling
+ * This file is part of libFirm.
*
- * Copyright (C) 2006 Universitaet Karlsruhe
- * Released under the GPL
+ * This file may be distributed and/or modified under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation and appearing in the file LICENSE.GPL included in the
+ * packaging of this file.
+ *
+ * Licensees holding valid libFirm Professional Edition licenses may use
+ * this file in accordance with the libFirm Commercial License.
+ * Agreement provided with the Software.
+ *
+ * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+ * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+
+/**
+ * @file
+ * @brief Code instrumentation and execution count profiling.
+ * @author Adam M. Szalkowski
+ * @date 06.04.2006
+ * @version $Id$
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#include "list.h"
#include "pmap.h"
-#include "entity.h"
#include "irprintf.h"
#include "irgwalk.h"
#include "irdump_t.h"
#include "iredges.h"
#include "execfreq.h"
#include "irvrfy.h"
-#include "type.h"
-#include "entity.h"
+#include "typerep.h"
#include "be_t.h"
#include "belive_t.h"
#include "besched_t.h"
#include "beirgmod.h"
-#include "bearch.h"
+#include "bearch_t.h"
#include "beabi.h"
#include "benode_t.h"
#include "beutil.h"
#include "ircons.h"
+#include "irhooks.h"
+#include "iredges.h"
#include "bechordal_t.h"
-#ifdef WITH_LIBCORE
-#include <libcore/lc_opts.h>
-#include <libcore/lc_opts_enum.h>
-#endif /* WITH_LIBCORE */
-
#include "beprofile.h"
+/** An entry in the id-to-location map */
+typedef struct loc_entry {
+ ir_entity *fname; /**< the entity holding the file name */
+ unsigned int lineno; /**< line number */
+} loc_entry;
+
typedef struct _block_id_walker_data_t {
- tarval **array;
- unsigned int id;
- ir_node *symconst;
+ tarval **array; /**< the entity the holds the block counts */
+ unsigned int id; /**< current block id number */
+ ir_node *symconst; /**< the SymConst representing array */
+ pmap *fname_map; /**< set containing all found filenames */
+ loc_entry *locs; /**< locations */
+ ir_type *tp_char; /**< the character type */
+ unsigned flags; /**< profile flags */
} block_id_walker_data_t;
typedef struct _execcount_t {
static int
cmp_execcount(const void * a, const void * b, size_t size)
{
+ (void) size;
return ((execcount_t*)a)->block != ((execcount_t*)b)->block;
}
block_counter(ir_node * bb, void * data)
{
unsigned int *count = data;
+ (void) bb;
*count = *count + 1;
-
}
static unsigned int
/* keep the execcounts here because they are only read once per compiler run */
static set * profile = NULL;
+static hook_entry_t hook;
/**
* Instrument a block with code needed for profiling
instrument_block(ir_node * bb, ir_node * address, unsigned int id)
{
ir_graph *irg = get_irn_irg(bb);
- ir_node *start_block = get_irg_start_block(irg);
- ir_node *load, *store, *offset, *add, *projm, *proji;
- ir_node *cnst;
+ ir_node *start_block = get_irg_start_block(irg);
+ ir_node *load, *store, *offset, *add, *projm, *proji, *unknown;
+ ir_node *cnst;
+
+ /**
+ * We can't instrument the end block as there are no real instructions there
+ */
+ if(bb == get_irg_end_block(irg))
+ return;
+
+ unknown = new_r_Unknown(irg, mode_M);
+ cnst = new_r_Const_long(irg, start_block, mode_Iu, get_mode_size_bytes(mode_Iu) * id);
+ offset = new_r_Add(irg, bb, address, cnst, mode_P);
+ load = new_r_Load(irg, bb, unknown, offset, mode_Iu);
+ projm = new_r_Proj(irg, bb, load, mode_M, pn_Load_M);
+ proji = new_r_Proj(irg, bb, load, mode_Iu, pn_Load_res);
+ cnst = new_r_Const_long(irg, start_block, mode_Iu, 1);
+ add = new_r_Add(irg, bb, proji, cnst, mode_Iu);
+ store = new_r_Store(irg, bb, projm, offset, add);
+ projm = new_r_Proj(irg, bb, store, mode_M, pn_Store_M);
+ set_irn_link(bb, projm);
+ set_irn_link(projm, load);
+}
- if(bb == start_block || bb == get_irg_end_block(irg))
+typedef struct fix_env {
+ ir_node *end_block;
+} fix_env;
+
+/**
+ * SSA Construction for instrumentation code memory
+ */
+static void
+fix_ssa(ir_node * bb, void * data)
+{
+ fix_env *env = data;
+ ir_node *mem;
+ int arity = get_Block_n_cfgpreds(bb);
+
+ /* start and end block are not instrumented, skip! */
+ if (bb == env->end_block)
return;
- cnst = new_r_Const_long(irg, start_block, mode_Iu, get_mode_size_bytes(mode_Iu) * id);
- offset = new_r_Add(irg, bb, address, cnst, mode_P);
- load = new_r_Load(irg, bb, new_NoMem(), offset, mode_Iu);
- projm = new_r_Proj(irg, bb, load, mode_M, pn_Load_M);
- proji = new_r_Proj(irg, bb, load, mode_Iu, pn_Load_res);
- cnst = new_r_Const_long(irg, start_block, mode_Iu, 1);
- add = new_r_Add(irg, bb, proji, cnst, mode_Iu);
- store = new_r_Store(irg, bb, projm, offset, add);
- projm = new_r_Proj(irg, bb, store, mode_M, pn_Store_M);
- keep_alive(projm);
+ if (bb == get_irg_start_block(get_irn_irg(bb))) {
+ mem = new_NoMem();
+ } else if (arity == 1) {
+ mem = get_irn_link(get_Block_cfgpred_block(bb, 0));
+ } else {
+ int n;
+ ir_node **ins;
+ ir_graph *irg = current_ir_graph;
+
+ NEW_ARR_A(ir_node*, ins, arity);
+ for (n = arity - 1; n >= 0; --n) {
+ ins[n] = get_irn_link(get_Block_cfgpred_block(bb, n));
+ }
+ mem = new_r_Phi(irg, bb, arity, ins, mode_M);
+ }
+ set_Load_mem(get_irn_link(get_irn_link(bb)), mem);
}
+
/**
* Generates a new irg which calls the initializer
+ *
+ * Pseudocode:
+ * void __firmprof_initializer(void) { __init_firmprof(ent_filename, bblock_id, bblock_counts, n_blocks); }
*/
static ir_graph *
-gen_initializer_irg(entity * ent_filename, entity * bblock_id, entity * bblock_counts, int n_blocks)
+gen_initializer_irg(ir_entity * ent_filename, ir_entity * bblock_id, ir_entity * bblock_counts, int n_blocks)
{
ir_node *start_block;
ir_node *ins[4];
ident *name = new_id_from_str("__firmprof_initializer");
- entity *ent = new_entity(get_glob_type(), name, new_type_method(name, 0, 0));
+ ir_entity *ent = new_entity(get_glob_type(), name, new_type_method(name, 0, 0));
ir_node *ret, *call, *symconst;
symconst_symbol sym;
ident *init_name = new_id_from_str("__init_firmprof");
ir_type *init_type = new_type_method(init_name, 4, 0);
ir_type *uint, *uintptr, *string;
- entity *init_ent;
+ ir_entity *init_ent;
ir_graph *irg;
ir_node *bb;
+ ir_type *empty_frame_type;
+
+ set_entity_ld_ident(ent, name);
uint = new_type_primitive(new_id_from_str("__uint"), mode_Iu);
uintptr = new_type_pointer(new_id_from_str("__uintptr"), uint, mode_P);
- string = new_type_pointer(new_id_from_str("__charptr"), new_type_primitive(new_id_from_str("__char"), mode_Bs), mode_P);
+ string = new_type_pointer(new_id_from_str("__charptr"), new_type_primitive(new_id_from_str("__char"), mode_Bs), mode_P);
set_method_param_type(init_type, 0, string);
set_method_param_type(init_type, 1, uintptr);
set_method_param_type(init_type, 2, uintptr);
set_method_param_type(init_type, 3, uint);
init_ent = new_entity(get_glob_type(), init_name, init_type);
+ set_entity_ld_ident(init_ent, init_name);
irg = new_ir_graph(ent, 0);
- set_current_ir_graph(irg);
+ empty_frame_type = get_irg_frame_type(irg);
+ set_type_size_bytes(empty_frame_type, 0);
bb = get_cur_block();
ins[2] = new_r_SymConst(irg, start_block, sym, symconst_addr_ent);
ins[3] = new_r_Const_long(irg, start_block, mode_Iu, n_blocks);
- call = new_r_Call( irg,
- bb, //ir_node * block,
- get_irg_initial_mem(irg), //ir_node * store,
- symconst, //ir_node * callee,
- 3, //int arity,
- ins, //ir_node ** in,
- init_type //ir_type * tp
- );
-
- ret = new_r_Return ( irg,
- bb, //ir_node * block,
- new_r_Proj(irg, bb, call, mode_M, pn_Call_M_regular), //ir_node * store,
- 0, //int arity,
- NULL //ir_node ** in
- );
-
+ call = new_r_Call(irg, bb, get_irg_initial_mem(irg), symconst, 4, ins, init_type);
+ ret = new_r_Return(irg, bb, new_r_Proj(irg, bb, call, mode_M, pn_Call_M_regular), 0, NULL);
mature_immBlock(bb);
add_immBlock_pred(get_irg_end_block(irg), ret);
return irg;
}
+/**
+ * Create the location data for the given debug info.
+ */
+static void create_location_data(dbg_info *dbg, block_id_walker_data_t *wd)
+{
+ unsigned lineno;
+ const char *fname = be_retrieve_dbg_info(dbg, &lineno);
+
+ if (fname) {
+ pmap_entry *entry = pmap_find(wd->fname_map, (void *)fname);
+ ir_entity *ent;
+
+ if (! entry) {
+ static unsigned nr = 0;
+ ident *id;
+ char buf[128];
+ ir_type *arr;
+ int i, len = strlen(fname) + 1;
+ tarval **tarval_string;
+
+ snprintf(buf, sizeof(buf), "firm_name_arr.%d", nr);
+ arr = new_type_array(new_id_from_str(buf), 1, wd->tp_char);
+ set_array_bounds_int(arr, 0, 0, len);
+
+ snprintf(buf, sizeof(buf), "__firm_name.%d", nr++);
+ id = new_id_from_str(buf);
+ ent = new_entity(get_glob_type(), id, arr);
+ set_entity_ld_ident(ent, id);
+
+ pmap_insert(wd->fname_map, (void *)fname, ent);
+
+ /* initialize file name string constant */
+ tarval_string = alloca(sizeof(*tarval_string) * (len));
+ for (i = 0; i < len; ++i) {
+ tarval_string[i] = new_tarval_from_long(fname[i], mode_Bs);
+ }
+ set_entity_variability(ent, variability_constant);
+ set_array_entity_values(ent, tarval_string, len);
+ } else {
+ ent = entry->value;
+ }
+ wd->locs[wd->id].fname = ent;
+ wd->locs[wd->id].lineno = lineno;
+ } else {
+ wd->locs[wd->id].fname = NULL;
+ wd->locs[wd->id].lineno = 0;
+ }
+}
+
+/**
+ * Walker: assigns an ID to every block.
+ * Builds the string table
+ */
static void
block_id_walker(ir_node * bb, void * data)
{
wd->array[wd->id] = new_tarval_from_long(get_irn_node_nr(bb), mode_Iu);
instrument_block(bb, wd->symconst, wd->id);
+
+ if (wd->flags & profile_with_locations) {
+ dbg_info *dbg = get_irn_dbg_info(bb);
+ create_location_data(dbg, wd);
+ }
++wd->id;
}
+#define IDENT(x) new_id_from_chars(x, sizeof(x) - 1)
+
ir_graph *
-be_profile_instrument(void)
+be_profile_instrument(const char *filename, unsigned flags)
{
- ir_graph *const_irg = get_const_code_irg();
- ir_node *const_block = get_irg_start_block(const_irg);
- int n, i;
- unsigned int n_blocks = 0;
- entity *bblock_id, *bblock_counts, *bblock_count, *ent_filename;
- ir_type *array_type, *integer_type, *string_type, *character_type;
- tarval **tarval_array, **tarval_string;
- char *filename = "test.c"; //FIXME
- int filename_len = strlen(filename)+1;
-
+ int n, i;
+ int n_blocks = 0;
+ ir_entity *bblock_id;
+ ir_entity *bblock_counts;
+ ir_entity *ent_filename;
+ ir_entity *ent_locations = NULL;
+ ir_entity *loc_lineno = NULL;
+ ir_entity *loc_name = NULL;
+ ir_entity *ent;
+ ir_type *array_type;
+ ir_type *uint_type;
+ ir_type *string_type;
+ ir_type *character_type;
+ ir_type *loc_type = NULL;
+ ir_type *charptr_type;
+ ir_type *gtp;
+ ir_node *start_block;
+ tarval **tarval_array;
+ tarval **tarval_string;
+ tarval *tv;
+ int filename_len = strlen(filename)+1;
+ ident *cur_ident;
+ int align_l, align_n, size;
+ ir_graph *rem;
block_id_walker_data_t wd;
symconst_symbol sym;
- integer_type = new_type_primitive(new_id_from_str("__uint"), mode_Iu);
- array_type = new_type_array(new_id_from_str("__block_info_array"), 1, integer_type);
+ /* count the number of block first */
+ for (n = get_irp_n_irgs() - 1; n >= 0; --n) {
+ ir_graph *irg = get_irp_irg(n);
+
+ n_blocks += count_blocks(irg);
+ }
+
+ /* create all the necessary types and entities. Note that the
+ types must have a fixed layout, because we already running in the
+ backend */
+ uint_type = new_type_primitive(IDENT("__uint"), mode_Iu);
+ set_type_alignment_bytes(uint_type, get_type_size_bytes(uint_type));
+
+ array_type = new_type_array(IDENT("__block_info_array"), 1, uint_type);
set_array_bounds_int(array_type, 0, 0, n_blocks);
- character_type = new_type_primitive(new_id_from_str("__char"), mode_Bs);
- string_type = new_type_array(new_id_from_str("__function_name"), 1, character_type);
+ set_type_size_bytes(array_type, n_blocks * get_mode_size_bytes(mode_Iu));
+ set_type_alignment_bytes(array_type, get_mode_size_bytes(mode_Iu));
+ set_type_state(array_type, layout_fixed);
+
+ character_type = new_type_primitive(IDENT("__char"), mode_Bs);
+ string_type = new_type_array(IDENT("__filename"), 1, character_type);
set_array_bounds_int(string_type, 0, 0, filename_len);
- bblock_id = new_entity(get_glob_type(), new_id_from_str("__BLOCK_IDS"), array_type);
+ set_type_size_bytes(string_type, filename_len);
+ set_type_alignment_bytes(string_type, 1);
+ set_type_state(string_type, layout_fixed);
+
+ gtp = get_glob_type();
+
+ cur_ident = IDENT("__FIRMPROF__BLOCK_IDS");
+ bblock_id = new_entity(gtp, cur_ident, array_type);
+ set_entity_ld_ident(bblock_id, cur_ident);
set_entity_variability(bblock_id, variability_initialized);
- bblock_counts = new_entity(get_glob_type(), new_id_from_str("__BLOCK_COUNTS"), array_type);
- set_entity_variability(bblock_counts, variability_initialized);
- bblock_count = new_entity(get_glob_type(), new_id_from_str("__N_BLOCKS"), integer_type);
- set_entity_variability(bblock_count, variability_initialized);
- ent_filename = new_entity(get_glob_type(), new_id_from_str("__FUNCTION_NAME"), string_type);
- set_entity_variability(ent_filename, variability_initialized);
- for (n = get_irp_n_irgs()-1; n>=0; --n) {
- ir_graph *irg = get_irp_irg(n);
+ cur_ident = IDENT("__FIRMPROF__BLOCK_COUNTS");
+ bblock_counts = new_entity(gtp, cur_ident, array_type);
+ set_entity_ld_ident(bblock_counts, cur_ident);
+ set_entity_variability(bblock_counts, variability_initialized);
- n_blocks += count_blocks(irg);
+ cur_ident = IDENT("__FIRMPROF__FILE_NAME");
+ ent_filename = new_entity(gtp, cur_ident, string_type);
+ set_entity_ld_ident(ent_filename, cur_ident);
+
+ if (flags & profile_with_locations) {
+ loc_type = new_type_struct(IDENT("__location"));
+ loc_lineno = new_entity(loc_type, IDENT("lineno"), uint_type);
+ align_l = get_type_alignment_bytes(uint_type);
+ size = get_type_size_bytes(uint_type);
+ set_entity_offset(loc_lineno, 0);
+
+ charptr_type = new_type_pointer(IDENT("__charptr"), character_type, mode_P_data);
+ align_n = get_type_size_bytes(charptr_type);
+ set_type_alignment_bytes(charptr_type, align_n);
+ loc_name = new_entity(loc_type, IDENT("name"), charptr_type);
+ size = (size + align_n - 1) & -align_n;
+ set_entity_offset(loc_name, size);
+ size += align_n;
+
+ if (align_n > align_l)
+ align_l = align_n;
+ size = (size + align_l - 1) & -align_l;
+ set_type_size_bytes(loc_type, size);
+ set_type_state(loc_type, layout_fixed);
+
+ loc_type = new_type_array(IDENT("__locarray"), 1, loc_type);
+ set_array_bounds_int(string_type, 0, 0, n_blocks);
+
+ cur_ident = IDENT("__FIRMPROF__LOCATIONS");
+ ent_locations = new_entity(gtp, cur_ident, loc_type);
+ set_entity_ld_ident(ent_locations, cur_ident);
}
/* initialize count array */
- tarval_array = alloca(sizeof(*tarval_array) * n_blocks);
- for(i = 0; i < n_blocks; ++i) {
- tarval_array[i] = get_tarval_null(mode_Iu);
+ NEW_ARR_A(tarval *, tarval_array, n_blocks);
+ tv = get_tarval_null(mode_Iu);
+ for (i = 0; i < n_blocks; ++i) {
+ tarval_array[i] = tv;
}
set_array_entity_values(bblock_counts, tarval_array, n_blocks);
- /* initialize the block count entity */
- set_atomic_ent_value(bblock_count, new_r_Const_long(const_irg, const_block, mode_Iu, n_blocks));
-
/* initialize function name string constant */
tarval_string = alloca(sizeof(*tarval_string) * (filename_len));
- for(i = 0; i < filename_len; ++i) {
+ for (i = 0; i < filename_len; ++i) {
tarval_string[i] = new_tarval_from_long(filename[i], mode_Bs);
}
+ set_entity_variability(ent_filename, variability_constant);
set_array_entity_values(ent_filename, tarval_string, filename_len);
-
/* initialize block id array and instrument blocks */
- wd.array = tarval_array;
- wd.id = 0;
- for (n = get_irp_n_irgs()-1; n>=0; --n) {
+ wd.array = tarval_array;
+ wd.id = 0;
+ wd.tp_char = character_type;
+ wd.flags = flags;
+ if (flags & profile_with_locations) {
+ wd.fname_map = pmap_create();
+ NEW_ARR_A(loc_entry, wd.locs, n_blocks);
+ }
+
+ for (n = get_irp_n_irgs() - 1; n >= 0; --n) {
ir_graph *irg = get_irp_irg(n);
+ int i;
+ ir_node *endbb = get_irg_end_block(irg);
+ fix_env env;
+
+ set_current_ir_graph(irg);
/* generate a symbolic constant pointing to the count array */
- sym.entity_p = bblock_count;
- wd.symconst = new_r_SymConst(irg, get_irg_start_block(irg), sym, symconst_addr_ent);
+ sym.entity_p = bblock_counts;
+ wd.symconst = new_r_SymConst(irg, get_irg_start_block(irg), sym, symconst_addr_ent);
irg_block_walk_graph(irg, block_id_walker, NULL, &wd);
+ start_block = get_irg_start_block(irg);
+ env.end_block = get_irg_end_block(irg);
+ irg_block_walk_graph(irg, fix_ssa, NULL, &env);
+ for (i = get_Block_n_cfgpreds(endbb) - 1; i >= 0; --i) {
+ ir_node *node = skip_Proj(get_Block_cfgpred(endbb, i));
+ ir_node *bb = get_Block_cfgpred_block(endbb, i);
+ ir_node *sync;
+ ir_node *ins[2];
+
+ switch (get_irn_opcode(node)) {
+ case iro_Return:
+ ins[0] = get_irn_link(bb);
+ ins[1] = get_Return_mem(node);
+ sync = new_r_Sync(irg, bb, 2, ins);
+ set_Return_mem(node, sync);
+ break;
+ case iro_Raise:
+ ins[0] = get_irn_link(bb);
+ ins[1] = get_Raise_mem(node);
+ sync = new_r_Sync(irg, bb, 2, ins);
+ set_Raise_mem(node, sync);
+ break;
+ default:
+ /* a fragile's op exception. There should be another path to End,
+ so ignore it */
+ assert(is_fragile_op(node) && "unexpected End control flow predecessor");
+ }
+ }
}
set_array_entity_values(bblock_id, tarval_array, n_blocks);
+ if (flags & profile_with_locations) {
+ /* build the initializer for the locations */
+ rem = current_ir_graph;
+ current_ir_graph = get_const_code_irg();
+ ent = get_array_element_entity(loc_type);
+ set_entity_variability(ent_locations, variability_constant);
+ for (i = 0; i < n_blocks; ++i) {
+ compound_graph_path *path;
+ tarval *tv;
+ ir_node *n;
+
+ /* lineno */
+ path = new_compound_graph_path(loc_type, 2);
+ set_compound_graph_path_array_index(path, 0, i);
+ set_compound_graph_path_node(path, 0, ent);
+ set_compound_graph_path_node(path, 1, loc_lineno);
+ tv = new_tarval_from_long(wd.locs[i].lineno, mode_Iu);
+ add_compound_ent_value_w_path(ent_locations, new_Const(mode_Iu, tv), path);
+
+ /* name */
+ path = new_compound_graph_path(loc_type, 2);
+ set_compound_graph_path_array_index(path, 0, i);
+ set_compound_graph_path_node(path, 0, ent);
+ set_compound_graph_path_node(path, 1, loc_name);
+ if (wd.locs[i].fname) {
+ sym.entity_p = wd.locs[i].fname;
+ n = new_SymConst(sym, symconst_addr_ent);
+ } else {
+ n = new_Const(mode_P_data, get_mode_null(mode_P_data));
+ }
+ add_compound_ent_value_w_path(ent_locations, n, path);
+ }
+ pmap_destroy(wd.fname_map);
+ }
return gen_initializer_irg(ent_filename, bblock_id, bblock_counts, n_blocks);
}
+static void
+profile_node_info(void *ctx, FILE *f, const ir_node *irn)
+{
+ (void) ctx;
+ if(is_Block(irn)) {
+ fprintf(f, "profiled execution count: %u\n", be_profile_get_block_execcount(irn));
+ }
+}
+
+static void
+register_vcg_hook(void)
+{
+ memset(&hook, 0, sizeof(hook));
+ hook.hook._hook_node_info = profile_node_info;
+ register_hook(hook_node_info, &hook);
+}
+
+static void
+unregister_vcg_hook(void)
+{
+ unregister_hook(hook_node_info, &hook);
+}
/**
* Reads the corresponding profile info file if it exists and returns a
* profile info struct
*/
void
-be_profile_read(char * filename)
+be_profile_read(const char *filename)
{
FILE *f;
char buf[8];
f = fopen(filename, "r");
if(f == NULL) {
- perror("opening of profile data failed");
return;
}
+ printf("found profile data '%s'.\n", filename);
/* check magic */
ret = fread(buf, 8, 1, f);
} while(1);
fclose(f);
+ register_vcg_hook();
}
/**
void
be_profile_free(void)
{
- if(profile)
+ if(profile) {
+ unregister_vcg_hook();
del_set(profile);
+ }
+}
+
+/**
+ * Tells whether profile module has acquired data
+ */
+int
+be_profile_has_data(void)
+{
+ return (profile != NULL);
}
/**
* Get block execution count as determined be profiling
*/
unsigned int
-be_profile_get_block_execcount(const ir_node * block)
+be_profile_get_block_execcount(const ir_node *block)
{
execcount_t *ec, query;
query.block = get_irn_node_nr(block);
ec = set_find(profile, &query, sizeof(query), get_irn_node_nr(block));
- if(ec) {
+ if(ec != NULL) {
return ec->count;
} else {
+ ir_fprintf(stderr, "Warning: Profile contains no data for %+F\n",
+ block);
return 1;
}
}
+
+typedef struct _intialize_execfreq_env_t {
+ ir_graph *irg;
+ ir_exec_freq *execfreqs;
+ double freq_factor;
+} initialize_execfreq_env_t;
+
+// minimal execution frequency (an execfreq of 0 confuses algos)
+static const double MIN_EXECFREQ = 0.00001;
+
+static void initialize_execfreq(ir_node *block, void *data) {
+ initialize_execfreq_env_t *env = data;
+ double freq;
+
+ if(block == get_irg_start_block(env->irg)
+ || block == get_irg_end_block(env->irg)) {
+ freq = 1.0;
+ } else {
+ freq = be_profile_get_block_execcount(block);
+ freq *= env->freq_factor;
+ if(freq < MIN_EXECFREQ)
+ freq = MIN_EXECFREQ;
+ }
+
+ set_execfreq(env->execfreqs, block, freq);
+}
+
+ir_exec_freq *be_create_execfreqs_from_profile(ir_graph *irg)
+{
+ ir_node *start_block;
+ initialize_execfreq_env_t env;
+ unsigned count;
+
+ env.irg = irg;
+ env.execfreqs = create_execfreq(irg);
+ start_block = get_irg_start_block(irg);
+
+ count = be_profile_get_block_execcount(start_block);
+ if(count == 0) {
+ // the function was never executed, so fallback to estimated freqs
+ free_execfreq(env.execfreqs);
+
+ return compute_execfreq(irg, 10);
+ }
+
+ env.freq_factor = 1.0 / count;
+ irg_block_walk_graph(irg, initialize_execfreq, NULL, &env);
+
+ return env.execfreqs;
+}
projects / libfirm / blobdiff