From: Adam Szalkowski Date: Wed, 31 May 2006 18:37:08 +0000 (+0000) Subject: execution frequency based on Kirchhoff's current law X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=1ddb7bc5b6bb20093f85cc0e3b501583a0a46667;p=libfirm execution frequency based on Kirchhoff's current law [r7842] --- diff --git a/ir/ana/Makefile.in b/ir/ana/Makefile.in index e154d2d3d..84014b031 100644 --- a/ir/ana/Makefile.in +++ b/ir/ana/Makefile.in @@ -19,7 +19,7 @@ INSTALL_HEADERS = irouts.h trouts.h irdom.h cgana.h irloop.h irtypeinfo.h irsimp callgraph.h rta.h interval_analysis.h \ field_temperature.h execution_frequency.h irextbb.h irconsconfirm.h \ analyze_irg_args.h height.h \ - cdep.h + cdep.h execfreq.h SOURCES = $(INSTALL_HEADERS) @@ -30,7 +30,7 @@ SOURCES += Makefile.in \ callgraph.c field_temperature.c execution_frequency.c phiclass.c \ irextbb.c irextbb_t.h irconsconfirm.c analyze_irg_args.c \ compute_loop_info.c compute_loop_info.h height.c \ - cdep.c + cdep.c execfreq.c include $(topdir)/MakeRules @@ -38,7 +38,7 @@ CPPFLAGS += -I$(top_srcdir)/ir/adt -I$(top_srcdir)/ir/ir -I$(top_srcdir)/ir/comm -I$(top_srcdir)/ir/ident -I$(top_srcdir)/ir/tr -I$(top_srcdir)/ir/tv \ -I$(top_srcdir)/ir/debug -I$(top_srcdir)/ir/ana -I$(top_srcdir)/ir/st \ -I$(top_srcdir)/ir/opt -I$(top_srcdir)/ir/stat -I$(top_srcdir)/ir/external \ - -I$(topdir)/ir/config -I$(top_srcdir)/ir/arch + -I$(topdir)/ir/config -I$(top_srcdir)/ir/arch -I$(HOME)/local/include include $(top_srcdir)/MakeTargets diff --git a/ir/ana/execfreq.c b/ir/ana/execfreq.c new file mode 100644 index 000000000..fa2960bbf --- /dev/null +++ b/ir/ana/execfreq.c @@ -0,0 +1,249 @@ +/* + * Project: libFIRM + * File name: ir/ana/execfreq.c + * Purpose: Compute an estimate of basic block executions. + * Author: Adam M. Szalkowski + * Modified by: + * Created: 28.05.2006 + * CVS-ID: $Id$ + * Copyright: (c) 2006 Universität Karlsruhe + * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +//#define USE_GSL + +#include +#include + +#ifdef USE_GSL +#include +#include +#else +#include "gaussjordan.h" +#endif + +#include "execfreq.h" + +#include "firm_common_t.h" +#include "set.h" +#include "hashptr.h" + +#include "irprog_t.h" +#include "irgraph_t.h" +#include "irnode_t.h" +#include "irloop.h" +#include "irgwalk.h" +#include "irouts.h" +#include "irprintf.h" + +#include "execfreq.h" + +#define set_foreach(s,i) for((i)=set_first((s)); (i); (i)=set_next((s))) + +typedef struct _walkerdata_t { + set *set; + size_t idx; +} walkerdata_t; + +static int +cmp_freq(const void *a, const void *b, size_t size) +{ + const freq_t *p = a; + const freq_t *q = b; + + return !(p->irn == q->irn); +} + +static freq_t * +set_find_freq(set * set, const ir_node * irn) +{ + freq_t query; + + 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; + + query.irn = irn; + query.freq = 0.0; + return set_insert(set, &query, sizeof(query), HASH_PTR(irn)); +} + +double +get_block_execfreq(set * freqs, const ir_node * irn) +{ + assert(is_Block(irn)); + + freq_t *freq = set_find_freq(freqs, irn); + assert(freq); + + return freq->freq; +} + +#define ZERO(x) (((x) > 0) ? ((x) < 0.0001) : ((x) > -0.0001)) + +static void +block_walker(ir_node * bb, void * data) +{ + walkerdata_t *wd = data; + + set_insert_freq(wd->set, bb); + set_irn_link(bb, (void*)wd->idx++); +} + +#ifdef USE_GSL +static gsl_vector * +solve_lgs(double * a_data, double * b_data, size_t size) +{ + gsl_matrix_view m + = gsl_matrix_view_array (a_data, size, size); + + gsl_vector_view b + = gsl_vector_view_array (b_data, size); + + gsl_vector *x = gsl_vector_alloc (size); + + int s; + + gsl_permutation * p = gsl_permutation_alloc (size); + + gsl_linalg_LU_decomp (&m.matrix, p, &s); + + gsl_linalg_LU_solve (&m.matrix, p, &b.vector, x); + + gsl_permutation_free (p); + + return x; +} +#else +static double * +solve_lgs(double * A, double * b, size_t size) +{ + if(firm_gaussjordansolve(A,b,size) == 0) { + return b; + } else { + return NULL; + } +} +#endif + +static double +get_cf_probability(const ir_node * bb, int pos) +{ +#define LOOP_WEIGHT 9.0 + + double sum = 0.0; + double cur = 0.0; + int i, + n; + ir_node *pred = get_Block_cfgpred_block(bb, pos); + + if(get_loop_depth(get_irn_loop(bb)) < get_loop_depth(get_irn_loop(pred))) { + cur = 1.0; + } else { + cur = LOOP_WEIGHT; + } + + for(i = 0, n = get_Block_n_cfg_outs(pred); i < n; ++i) { + ir_node *succ = get_Block_cfg_out(pred, i); + + if(get_loop_depth(get_irn_loop(succ)) < get_loop_depth(get_irn_loop(pred))) { + sum += 1.0; + } else { + sum += LOOP_WEIGHT; + } + } + + return cur/sum; +} + +set * +compute_execfreq(ir_graph * irg) +{ + set *freqs = new_set(cmp_freq, 32); + size_t size; + double *matrix; + double *rhs; + size_t i = 0; + freq_t *freq; + walkerdata_t wd; +#ifdef USE_GSL + gsl_vector *x; +#else + double *x; +#endif + + construct_cf_backedges(irg); + + wd.idx = 0; + wd.set = freqs; + + irg_block_walk_graph(irg, block_walker, NULL, &wd); + + size = set_count(freqs); + matrix = malloc(size*size*sizeof(*matrix)); + memset(matrix, 0, size*size*sizeof(*matrix)); + rhs = malloc(size*sizeof(*rhs)); + memset(rhs, 0, size*sizeof(*rhs)); + + set_foreach(freqs, freq) { + const ir_node *bb = freq->irn; + size_t idx = (int)get_irn_link(bb); + + matrix[idx*(size+1)] = -1.0; + + if(bb == get_irg_start_block(irg)) { + rhs[(int)get_irn_link(bb)] = -1.0; + continue; + } + + for(i = 0; i < get_Block_n_cfgpreds(bb); ++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); + } + } + + x = solve_lgs(matrix, rhs, size); + if(x == NULL) { + del_set(freqs); + return NULL; + } + + 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); +#else + freq->freq = ZERO(x[idx]) ? 0.0 : x[idx]; +#endif + ir_fprintf(stderr, "execfreq %+F: %f\n", bb, freq->freq); + } + +#ifdef USE_GSL + gsl_vector_free(x); +#endif + free(matrix); + + return freqs; +} + +void +free_execfreq(set * freqs) +{ + if(freqs) del_set(freqs); +} + +#undef ELEM diff --git a/ir/ana/execfreq.h b/ir/ana/execfreq.h new file mode 100644 index 000000000..2557be4f8 --- /dev/null +++ b/ir/ana/execfreq.h @@ -0,0 +1,18 @@ +#ifndef EXECFREQ_H_ +#define EXECFREQ_H_ + +#include "irgraph_t.h" +#include "irnode_t.h" + +typedef struct _freq_t { + const ir_node *irn; + double freq; +} freq_t; + +set *compute_execfreq(ir_graph * irg); + +void free_execfreq(set * freqs); + +double get_block_execfreq(set * freqs, const ir_node * irn); + +#endif