+/*
+ * This file is part of libFirm.
+ * Copyright (C) 2012 University of Karlsruhe.
+ */
+
/**
- * Author: Christian Wuerdig
- * Date: 2007/02/19
- * Copyright: (c) Universitaet Karlsruhe
- * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
- * CVS-Id: $Id$
- *
- * Compute register pressure in loops
+ * @file
+ * @brief Compute register pressure in loops.
+ * @author Christian Wuerdig
+ * @date 19.02.2007
*/
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
#include "set.h"
#include "pset.h"
#include "irnode.h"
-#include "irtools.h"
+#include "util.h"
#include "irloop_t.h"
+#include "error.h"
+#include "debug.h"
#include "bearch.h"
+#include "beirg.h"
#include "belive.h"
#include "besched.h"
#include "beloopana.h"
+#include "bemodule.h"
+
+DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
-#define HASH_LOOP_INFO(info) (HASH_PTR((info)->loop) ^ HASH_PTR((info)->cls))
+#define HASH_LOOP_INFO(info) (hash_ptr((info)->loop) ^ hash_ptr((info)->cls))
-typedef struct _be_loop_info_t {
+typedef struct be_loop_info_t {
ir_loop *loop;
const arch_register_class_t *cls;
unsigned max_pressure;
} be_loop_info_t;
-struct _be_loopana_t {
- set *data;
- be_irg_t *birg;
- DEBUG_ONLY(firm_dbg_module_t *dbg);
+struct be_loopana_t {
+ set *data;
};
-static int cmp_loop_info(const void *a, const void *b, size_t sz) {
- const be_loop_info_t *i1 = a;
- const be_loop_info_t *i2 = b;
+static int cmp_loop_info(const void *a, const void *b, size_t size)
+{
+ const be_loop_info_t *i1 = (const be_loop_info_t*)a;
+ const be_loop_info_t *i2 = (const be_loop_info_t*)b;
+ (void) size;
return ! (i1->loop == i2->loop && i1->cls == i2->cls);
}
/**
* Compute the highest register pressure in a block.
- * @param loop_ana The loop ana object.
* @param block The block to compute pressure for.
* @param cls The register class to compute pressure for.
* @return The highest register pressure in the given block.
*/
-static unsigned be_compute_block_pressure(be_loopana_t *loop_ana, ir_node *block, const arch_register_class_t *cls) {
- const arch_env_t *aenv = loop_ana->birg->main_env->arch_env;
- pset *live_nodes = pset_new_ptr_default();
- ir_node *irn;
- int max_live;
+static unsigned be_compute_block_pressure(ir_node *const block, arch_register_class_t const *const cls)
+{
+ ir_nodeset_t live_nodes;
+ size_t max_live;
- DBG((loop_ana->dbg, LEVEL_1, "Processing Block %+F\n", block));
+ DBG((dbg, LEVEL_1, "Processing Block %+F\n", block));
/* determine largest pressure with this block */
- live_nodes = be_liveness_end_of_block(loop_ana->birg->lv, aenv, cls, block, live_nodes);
- max_live = pset_count(live_nodes);
+ ir_nodeset_init(&live_nodes);
+ be_lv_t *const lv = be_get_irg_liveness(get_Block_irg(block));
+ be_liveness_end_of_block(lv, cls, block, &live_nodes);
+ max_live = ir_nodeset_size(&live_nodes);
sched_foreach_reverse(block, irn) {
- int cnt;
+ size_t cnt;
if (is_Phi(irn))
break;
- live_nodes = be_liveness_transfer(aenv, cls, irn, live_nodes);
- cnt = pset_count(live_nodes);
- max_live = MAX(cnt, max_live);
+ be_liveness_transfer(cls, irn, &live_nodes);
+ cnt = ir_nodeset_size(&live_nodes);
+ max_live = MAX(cnt, max_live);
}
- DBG((loop_ana->dbg, LEVEL_1, "Finished with Block %+F (%s %u)\n", block, cls->name, max_live));
+ DBG((dbg, LEVEL_1, "Finished with Block %+F (%s %zu)\n", block, cls->name, max_live));
- del_pset(live_nodes);
+ ir_nodeset_destroy(&live_nodes);
return max_live;
}
/**
- * Compute the highest register pressure in a loop and it's sub-loops.
+ * Compute the highest register pressure in a loop and its sub-loops.
* @param loop_ana The loop ana object.
* @param loop The loop to compute pressure for.
* @param cls The register class to compute pressure for.
* @return The highest register pressure in the given loop.
*/
-static unsigned be_compute_loop_pressure(be_loopana_t *loop_ana, ir_loop *loop, const arch_register_class_t *cls) {
- int i, max;
+static unsigned be_compute_loop_pressure(be_loopana_t *loop_ana, ir_loop *loop,
+ const arch_register_class_t *cls)
+{
+ size_t i, max;
unsigned pressure;
be_loop_info_t *entry, key;
- DBG((loop_ana->dbg, LEVEL_1, "\nProcessing Loop %d\n", loop->loop_nr));
+ DBG((dbg, LEVEL_1, "\nProcessing Loop %ld\n", loop->loop_nr));
assert(get_loop_n_elements(loop) > 0);
pressure = 0;
unsigned son_pressure;
loop_element elem = get_loop_element(loop, i);
- switch (*elem.kind) {
- case k_ir_node:
- son_pressure = be_compute_block_pressure(loop_ana, elem.node, cls);
- break;
- case k_ir_loop:
- son_pressure = be_compute_loop_pressure(loop_ana, elem.son, cls);
- break;
- default:
- assert(0);
- break;
+ if (*elem.kind == k_ir_node)
+ son_pressure = be_compute_block_pressure(elem.node, cls);
+ else {
+ assert(*elem.kind == k_ir_loop);
+ son_pressure = be_compute_loop_pressure(loop_ana, elem.son, cls);
}
pressure = MAX(pressure, son_pressure);
- }
- DBG((loop_ana->dbg, LEVEL_1, "Done with loop %d, pressure %u for class %s\n", loop->loop_nr, pressure, cls->name));
+ }
+ DBG((dbg, LEVEL_1, "Done with loop %ld, pressure %u for class %s\n", loop->loop_nr, pressure, cls->name));
/* update info in set */
key.loop = loop;
key.cls = cls;
key.max_pressure = 0;
- entry = set_insert(loop_ana->data, &key, sizeof(key), HASH_LOOP_INFO(&key));
+ entry = set_insert(be_loop_info_t, loop_ana->data, &key, sizeof(key), HASH_LOOP_INFO(&key));
entry->max_pressure = MAX(entry->max_pressure, pressure);
return pressure;
}
-/**
- * Compute the register pressure for a class of all loops in the birg.
- * @param birg The backend irg object
- * @param cls The register class to compute the pressure for
- * @return The loop analysis object.
- */
-be_loopana_t *be_new_loop_pressure_cls(be_irg_t *birg, const arch_register_class_t *cls) {
- be_loopana_t *loop_ana = xmalloc(sizeof(loop_ana));
+be_loopana_t *be_new_loop_pressure(ir_graph *const irg, arch_register_class_t const *const cls)
+{
+ be_loopana_t *loop_ana = XMALLOC(be_loopana_t);
loop_ana->data = new_set(cmp_loop_info, 16);
- loop_ana->birg = birg;
- FIRM_DBG_REGISTER(loop_ana->dbg, "firm.be.loopana");
- DBG((loop_ana->dbg, LEVEL_1, "\n=====================================================\n", cls->name));
- DBG((loop_ana->dbg, LEVEL_1, " Computing register pressure for class %s:\n", cls->name));
- DBG((loop_ana->dbg, LEVEL_1, "=====================================================\n", cls->name));
+ DBG((dbg, LEVEL_1, "\n=====================================================\n", cls->name));
+ DBG((dbg, LEVEL_1, " Computing register pressure for class %s:\n", cls->name));
+ DBG((dbg, LEVEL_1, "=====================================================\n", cls->name));
- be_compute_loop_pressure(loop_ana, get_irg_loop(birg->irg), cls);
+ assure_loopinfo(irg);
- return loop_ana;
-}
-
-/**
- * Compute the register pressure for all classes of all loops in the birg.
- * @param birg The backend irg object
- * @return The loop analysis object.
- */
-be_loopana_t *be_new_loop_pressure(be_irg_t *birg) {
- be_loopana_t *loop_ana = xmalloc(sizeof(loop_ana));
- ir_loop *irg_loop = get_irg_loop(birg->irg);
- int i;
-
- loop_ana->data = new_set(cmp_loop_info, 16);
- loop_ana->birg = birg;
- FIRM_DBG_REGISTER(loop_ana->dbg, "firm.be.loopana");
-
- for (i = arch_isa_get_n_reg_class(birg->main_env->arch_env->isa) - 1; i >= 0; --i) {
- const arch_register_class_t *cls = arch_isa_get_reg_class(birg->main_env->arch_env->isa, i);
- DBG((loop_ana->dbg, LEVEL_1, "\n=====================================================\n", cls->name));
- DBG((loop_ana->dbg, LEVEL_1, " Computing register pressure for class %s:\n", cls->name));
- DBG((loop_ana->dbg, LEVEL_1, "=====================================================\n", cls->name));
- be_compute_loop_pressure(loop_ana, irg_loop, cls);
- }
+ be_compute_loop_pressure(loop_ana, get_irg_loop(irg), cls);
return loop_ana;
}
-/**
- * Returns the computed register pressure for the given class and loop.
- * @return The pressure or INT_MAX if not found
- */
-unsigned be_get_loop_pressure(be_loopana_t *loop_ana, const arch_register_class_t *cls, ir_loop *loop) {
+unsigned be_get_loop_pressure(be_loopana_t *loop_ana, const arch_register_class_t *cls, ir_loop *loop)
+{
unsigned pressure = INT_MAX;
be_loop_info_t *entry, key;
key.loop = loop;
key.cls = cls;
- entry = set_find(loop_ana->data, &key, sizeof(key), HASH_LOOP_INFO(&key));
+ entry = set_find(be_loop_info_t, loop_ana->data, &key, sizeof(key), HASH_LOOP_INFO(&key));
if (entry)
pressure = entry->max_pressure;
else
- assert(0 && "Pressure not computed for given class and loop object.");
+ panic("Pressure not computed for given class and loop object.");
return pressure;
}
-/**
- * Frees the loop analysis object.
- */
-void be_free_loop_pressure(be_loopana_t *loop_ana) {
+void be_free_loop_pressure(be_loopana_t *loop_ana)
+{
del_set(loop_ana->data);
xfree(loop_ana);
}
+
+BE_REGISTER_MODULE_CONSTRUCTOR(be_init_loopana)
+void be_init_loopana(void)
+{
+ FIRM_DBG_REGISTER(dbg, "firm.be.loopana");
+}
projects / libfirm / blobdiff