From 125a8b9084287edfaa3868534c8a2611a8b44dce Mon Sep 17 00:00:00 2001 From: Matthias Braun Date: Fri, 8 Sep 2006 09:11:41 +0000 Subject: [PATCH] create execution frequencies from profile data [r8197] --- ir/ana/execfreq.c | 162 ++++++++++++++++++++++++++-------------------- ir/ana/execfreq.h | 15 ++++- 2 files changed, 106 insertions(+), 71 deletions(-) diff --git a/ir/ana/execfreq.c b/ir/ana/execfreq.c index 6365b09ce..f7ca3f34d 100644 --- a/ir/ana/execfreq.c +++ b/ir/ana/execfreq.c @@ -72,29 +72,29 @@ struct _exec_freq_t { static int cmp_freq(const void *a, const void *b, size_t size) { - const freq_t *p = a; - const freq_t *q = b; + const freq_t *p = a; + const freq_t *q = b; - return !(p->irn == q->irn); + return !(p->irn == q->irn); } static freq_t * set_find_freq(set * set, const ir_node * irn) { - freq_t query; + freq_t query; - query.irn = irn; - return set_find(set, &query, sizeof(query), HASH_PTR(irn)); + query.irn = irn; + return set_find(set, &query, sizeof(query), HASH_PTR(irn)); } static freq_t * set_insert_freq(set * set, const ir_node * irn) { - freq_t query; + freq_t query; - query.irn = irn; - query.freq = 0.0; - return set_insert(set, &query, sizeof(query), HASH_PTR(irn)); + query.irn = irn; + query.freq = 0.0; + return set_insert(set, &query, sizeof(query), HASH_PTR(irn)); } double @@ -106,6 +106,8 @@ get_block_execfreq(const exec_freq_t *ef, const ir_node * irn) assert(is_Block(irn)); freq = set_find_freq(freqs, irn); assert(freq); + + assert(freq->freq >= 0); return freq->freq; } @@ -193,108 +195,128 @@ static void exec_freq_node_info(void *ctx, FILE *f, const ir_node *irn) } } +exec_freq_t *create_execfreq(ir_graph *irg) +{ + exec_freq_t *execfreq = xmalloc(sizeof(execfreq[0])); + memset(execfreq, 0, sizeof(execfreq[0])); + execfreq->set = new_set(cmp_freq, 32); + + memset(&execfreq->hook, 0, sizeof(execfreq->hook)); + execfreq->hook.context = execfreq; + execfreq->hook.hook._hook_node_info = exec_freq_node_info; + register_hook(hook_node_info, &execfreq->hook); + + return execfreq; +} + +void set_execfreq(exec_freq_t *execfreq, const ir_node *block, double freq) +{ + freq_t *f = set_insert_freq(execfreq->set, block); + f->freq = freq; +} + exec_freq_t * compute_execfreq(ir_graph * irg, double loop_weight) { - size_t size; - double *matrix; - double *rhs; - int i; - freq_t *freq; - walkerdata_t wd; + size_t size; + double *matrix; + double *rhs; + int i; + freq_t *freq; + walkerdata_t wd; exec_freq_t *ef; set *freqs; #ifdef USE_GSL - gsl_vector *x; + gsl_vector *x; #else - double *x; + double *x; #endif ef = xmalloc(sizeof(ef[0])); memset(ef, 0, sizeof(ef[0])); ef->min_non_zero = 1e50; /* initialize with a reasonable large number. */ - freqs = ef->set = new_set(cmp_freq, 32); + freqs = ef->set = new_set(cmp_freq, 32); - construct_cf_backedges(irg); + construct_cf_backedges(irg); - wd.idx = 0; - wd.set = freqs; + wd.idx = 0; + wd.set = freqs; - irg_block_walk_graph(irg, block_walker, NULL, &wd); + irg_block_walk_graph(irg, block_walker, NULL, &wd); - size = set_count(freqs); - matrix = xmalloc(size*size*sizeof(*matrix)); - memset(matrix, 0, size*size*sizeof(*matrix)); - rhs = xmalloc(size*sizeof(*rhs)); - memset(rhs, 0, size*sizeof(*rhs)); + size = set_count(freqs); + matrix = xmalloc(size*size*sizeof(*matrix)); + memset(matrix, 0, size*size*sizeof(*matrix)); + rhs = xmalloc(size*sizeof(*rhs)); + memset(rhs, 0, size*sizeof(*rhs)); - set_foreach(freqs, freq) { - ir_node *bb = (ir_node *)freq->irn; - size_t idx = (int)get_irn_link(bb); + set_foreach(freqs, freq) { + ir_node *bb = (ir_node *)freq->irn; + size_t idx = (int)get_irn_link(bb); - matrix[idx * (size + 1)] = -1.0; + matrix[idx * (size + 1)] = -1.0; - if (bb == get_irg_start_block(irg)) { - rhs[(int)get_irn_link(bb)] = -1.0; - continue; - } + if (bb == get_irg_start_block(irg)) { + rhs[(int)get_irn_link(bb)] = -1.0; + continue; + } - for(i = get_Block_n_cfgpreds(bb) - 1; i >= 0; --i) { - ir_node *pred = get_Block_cfgpred_block(bb, i); - size_t pred_idx = (int)get_irn_link(pred); + for(i = get_Block_n_cfgpreds(bb) - 1; i >= 0; --i) { + ir_node *pred = get_Block_cfgpred_block(bb, i); + size_t pred_idx = (int)get_irn_link(pred); -// matrix[pred_idx + idx*size] += 1.0/(double)get_Block_n_cfg_outs(pred); - matrix[pred_idx + idx * size] += get_cf_probability(bb, i, loop_weight); - } - } + // matrix[pred_idx + idx*size] += 1.0/(double)get_Block_n_cfg_outs(pred); + matrix[pred_idx + idx * size] += get_cf_probability(bb, i, loop_weight); + } + } - x = solve_lgs(matrix, rhs, size); - if(x == NULL) { + x = solve_lgs(matrix, rhs, size); + if(x == NULL) { ef->infeasible = 1; return ef; - } + } - ef->max = MAX_INT_FREQ; - set_foreach(freqs, freq) { - const ir_node *bb = freq->irn; - size_t idx = PTR_TO_INT(get_irn_link(bb)); + ef->max = MAX_INT_FREQ; + set_foreach(freqs, freq) { + const ir_node *bb = freq->irn; + size_t idx = PTR_TO_INT(get_irn_link(bb)); #ifdef USE_GSL - freq->freq = ZERO(gsl_vector_get(x, idx)) ? 0.0 : gsl_vector_get(x, idx); + freq->freq = ZERO(gsl_vector_get(x, idx)) ? 0.0 : gsl_vector_get(x, idx); #else - freq->freq = ZERO(x[idx]) ? 0.0 : x[idx]; + freq->freq = ZERO(x[idx]) ? 0.0 : x[idx]; #endif - /* get the maximum exec freq */ - ef->max = MAX(ef->max, freq->freq); + /* get the maximum exec freq */ + ef->max = MAX(ef->max, freq->freq); - /* Get the minimum non-zero execution frequency. */ - if(freq->freq > 0.0) - ef->min_non_zero = MIN(ef->min_non_zero, freq->freq); - } + /* Get the minimum non-zero execution frequency. */ + if(freq->freq > 0.0) + ef->min_non_zero = MIN(ef->min_non_zero, freq->freq); + } - /* compute m and b of the transformation used to convert the doubles into scaled ints */ - { - double l1 = 1.0; - double h1 = MAX_INT_FREQ; - double l2 = ef->min_non_zero; - double h2 = ef->max; + /* compute m and b of the transformation used to convert the doubles into scaled ints */ + { + double l1 = 1.0; + double h1 = MAX_INT_FREQ; + double l2 = ef->min_non_zero; + double h2 = ef->max; - ef->m = (h1 - l1) / (h2 - l2); - ef->b = (l1 * h2 - l2 * h1) / (h2 - l2); - } + ef->m = (h1 - l1) / (h2 - l2); + ef->b = (l1 * h2 - l2 * h1) / (h2 - l2); + } #ifdef USE_GSL - gsl_vector_free(x); + gsl_vector_free(x); #endif - free(matrix); + free(matrix); memset(&ef->hook, 0, sizeof(ef->hook)); ef->hook.context = ef; ef->hook.hook._hook_node_info = exec_freq_node_info; register_hook(hook_node_info, &ef->hook); - return ef; + return ef; } void diff --git a/ir/ana/execfreq.h b/ir/ana/execfreq.h index 2d03f69d2..b44acb49f 100644 --- a/ir/ana/execfreq.h +++ b/ir/ana/execfreq.h @@ -16,7 +16,20 @@ struct _exec_freq_t; typedef struct _exec_freq_t exec_freq_t; -exec_freq_t * compute_execfreq(ir_graph *irg, double loop_weight); +/** + * Create execfreq structure (to be used with set_execfreq) + */ +exec_freq_t *create_execfreq(ir_graph *irg); + +/** + * Set execution frequency of a basic block + */ +void set_execfreq(exec_freq_t *ef, const ir_node *block, double freq); + +/** + * Create execfreq structure and initialze with estimated frequencies + */ +exec_freq_t *compute_execfreq(ir_graph *irg, double loop_weight); void free_execfreq(exec_freq_t *ef); -- 2.20.1