/*
- * Author: Matthias Braun
- * Date: 05.05.2006
- * Copyright: (c) Universitaet Karlsruhe
- * License: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
- * CVS-Id: $Id$
+ * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
+ *
+ * This file is part of libFirm.
+ *
+ * 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 Various verify routines that check a scheduled graph for correctness.
+ * @author Matthias Braun
+ * @date 05.05.2006
+ * @version $Id$
*/
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
-#include "beverify.h"
-#include "belive.h"
-#include "besched_t.h"
+#include <limits.h>
+
+#include "bitset.h"
+#include "set.h"
+#include "array.h"
#include "irnode.h"
#include "irgraph.h"
#include "irgwalk.h"
#include "irprintf.h"
#include "irdump_t.h"
+#include "iredges.h"
+
+#include "beverify.h"
+#include "belive.h"
+#include "besched_t.h"
#include "benode_t.h"
+#include "beirg_t.h"
+#include "beintlive_t.h"
+
+static int my_values_interfere(const ir_node *a, const ir_node *b);
typedef struct be_verify_register_pressure_env_t_ {
ir_graph *irg; /**< the irg to verify */
- const arch_env_t *arch_env; /**< an architecture environment */
+ be_lv_t *lv; /**< Liveness information. */
const arch_register_class_t *cls; /**< the register class to check for */
int registers_available; /**< number of available registers */
int problem_found; /**< flag indicating if a problem was found */
/**
* Print all nodes of a pset into a file.
*/
-static void print_living_values(FILE *F, pset *live_nodes)
-{
+static void print_living_values(FILE *F, const ir_nodeset_t *live_nodes) {
+ ir_nodeset_iterator_t iter;
ir_node *node;
ir_fprintf(F, "\t");
- foreach_pset(live_nodes, node) {
+ foreach_ir_nodeset(live_nodes, node, iter) {
ir_fprintf(F, "%+F ", node);
}
ir_fprintf(F, "\n");
/**
* Check if number of live nodes never exceeds the number of available registers.
*/
-static void verify_liveness_walker(ir_node *block, void *data)
-{
+static void verify_liveness_walker(ir_node *block, void *data) {
be_verify_register_pressure_env_t *env = (be_verify_register_pressure_env_t *)data;
- pset *live_nodes = pset_new_ptr_default();
+ ir_nodeset_t live_nodes;
ir_node *irn;
int pressure;
/* collect register pressure info, start with end of a block */
- be_liveness_end_of_block(env->arch_env, env->cls, block, live_nodes);
+ // ir_fprintf(stderr, "liveness check %+F\n", block);
+ ir_nodeset_init(&live_nodes);
+ be_liveness_end_of_block(env->lv, env->cls, block,
+ &live_nodes);
- pressure = pset_count(live_nodes);
+ // print_living_values(stderr, &live_nodes);
+ pressure = ir_nodeset_size(&live_nodes);
if(pressure > env->registers_available) {
ir_fprintf(stderr, "Verify Warning: Register pressure too high at end of block %+F(%s) (%d/%d):\n",
block, get_irg_dump_name(env->irg), pressure, env->registers_available);
- print_living_values(stderr, live_nodes);
+ print_living_values(stderr, &live_nodes);
env->problem_found = 1;
}
if (is_Phi(irn))
break;
- be_liveness_transfer(env->arch_env, env->cls, irn, live_nodes);
+ // print_living_values(stderr, &live_nodes);
+ be_liveness_transfer(env->cls, irn, &live_nodes);
- pressure = pset_count(live_nodes);
+ pressure = ir_nodeset_size(&live_nodes);
if(pressure > env->registers_available) {
ir_fprintf(stderr, "Verify Warning: Register pressure too high before node %+F in %+F(%s) (%d/%d):\n",
irn, block, get_irg_dump_name(env->irg), pressure, env->registers_available);
- print_living_values(stderr, live_nodes);
+ print_living_values(stderr, &live_nodes);
env->problem_found = 1;
+ assert(0);
}
}
- del_pset(live_nodes);
+ ir_nodeset_destroy(&live_nodes);
}
/**
* Start a walk over the irg and check the register pressure.
*/
-int be_verify_register_pressure(const arch_env_t *arch_env, const arch_register_class_t *cls, ir_graph *irg)
-{
+int be_verify_register_pressure(const be_irg_t *birg,
+ const arch_register_class_t *cls,
+ ir_graph *irg) {
be_verify_register_pressure_env_t env;
- be_liveness(irg);
-
+ env.lv = be_liveness(birg);
env.irg = irg;
- env.arch_env = arch_env;
env.cls = cls;
- env.registers_available = arch_count_non_ignore_regs(arch_env, cls);
+ env.registers_available = env.cls->n_regs - be_put_ignore_regs(birg, env.cls, NULL);
env.problem_found = 0;
+ be_liveness_assure_sets(env.lv);
irg_block_walk_graph(irg, verify_liveness_walker, NULL, &env);
+ be_liveness_free(env.lv);
return ! env.problem_found;
}
+
+
+/*--------------------------------------------------------------------------- */
+
+
+
typedef struct be_verify_schedule_env_t_ {
- int problem_found; /**< flags indicating if there was a problem */
- ir_graph *irg; /**< the irg to check */
+ int problem_found; /**< flags indicating if there was a problem */
+ bitset_t *scheduled; /**< bitset of scheduled nodes */
+ ir_graph *irg; /**< the irg to check */
} be_verify_schedule_env_t;
/**
* Simple schedule checker.
*/
-static void verify_schedule_walker(ir_node *block, void *data)
-{
+static void verify_schedule_walker(ir_node *block, void *data) {
be_verify_schedule_env_t *env = (be_verify_schedule_env_t*) data;
ir_node *node;
- int non_phi_found = 0;
+ ir_node *non_phi_found = NULL;
int cfchange_found = 0;
- // TODO ask arch about delay branches
+ /* TODO ask arch about delay branches */
int delay_branches = 0;
- pset *uses = pset_new_ptr_default();
+ int last_timestep = INT_MIN;
/*
* Tests for the following things:
* 1. Make sure that all phi nodes are scheduled at the beginning of the block
* 2. There is 1 or no control flow changing node scheduled and exactly delay_branches operations after it.
* 3. No value is defined after it has been used
+ * 4. mode_T nodes have all projs scheduled behind them followed by Keeps
+ * (except mode_X projs)
*/
sched_foreach(block, node) {
int i, arity;
+ int timestep;
- // 1. Check for phis
+ /* this node is scheduled */
+ if(bitset_is_set(env->scheduled, get_irn_idx(node))) {
+ ir_fprintf(stderr, "Verify warning: %+F appears to be schedule twice\n");
+ env->problem_found = 1;
+ }
+ bitset_set(env->scheduled, get_irn_idx(node));
+
+ /* Check that scheduled nodes are in the correct block */
+ if(get_nodes_block(node) != block) {
+ ir_fprintf(stderr, "Verify warning: %+F is in block %+F but scheduled in %+F\n", node, get_nodes_block(node), block);
+ env->problem_found = 1;
+ }
+
+ /* Check that timesteps are increasing */
+ timestep = sched_get_time_step(node);
+ if(timestep <= last_timestep) {
+ ir_fprintf(stderr, "Verify warning: Schedule timestep did not increase at node %+F\n",
+ node);
+ env->problem_found = 1;
+ }
+ last_timestep = timestep;
+
+ /* Check that phis come before any other node */
if (is_Phi(node)) {
- if (non_phi_found) {
- ir_fprintf(stderr, "Verify Warning: Phi node %+F scheduled after non-Phi nodes in block %+F (%s)\n",
- node, block, get_irg_dump_name(env->irg));
+ if (non_phi_found != NULL) {
+ ir_fprintf(stderr, "Verify Warning: Phi node %+F scheduled after non-Phi nodes (for example %+F) in block %+F (%s)\n",
+ node, non_phi_found, block, get_irg_dump_name(env->irg));
env->problem_found = 1;
}
} else {
- non_phi_found = 1;
+ non_phi_found = node;
}
- // 2. Check for control flow changing nodes
+ /* Check for control flow changing nodes */
if (is_cfop(node) && get_irn_opcode(node) != iro_Start) {
/* check, that only one CF operation is scheduled */
if (cfchange_found == 1) {
}
cfchange_found = 1;
} else if (cfchange_found) {
- // proj and keepany aren't real instructions...
+ /* proj and keepany aren't real instructions... */
if(!is_Proj(node) && !be_is_Keep(node)) {
/* check for delay branches */
if (delay_branches == 0) {
}
}
- // 3. Check for uses
- if(pset_find_ptr(uses, node)) {
- ir_fprintf(stderr, "Verify Warning: Value %+F used before it was defined in block %+F (%s)\n",
- node, block, get_irg_dump_name(env->irg));
- env->problem_found = 1;
- }
+ /* Check that all uses come before their definitions */
if(!is_Phi(node)) {
+ int nodetime = sched_get_time_step(node);
for(i = 0, arity = get_irn_arity(node); i < arity; ++i) {
- pset_insert_ptr(uses, get_irn_n(node, i));
+ ir_node *arg = get_irn_n(node, i);
+ if(get_nodes_block(arg) != block
+ || !sched_is_scheduled(arg))
+ continue;
+
+ if(sched_get_time_step(arg) >= nodetime) {
+ ir_fprintf(stderr, "Verify Warning: Value %+F used by %+F before it was defined in block %+F (%s)\n",
+ arg, node, block, get_irg_dump_name(env->irg));
+ env->problem_found = 1;
+ }
+ }
+ }
+
+ /* Check that no dead nodes are scheduled */
+ if(get_irn_n_edges(node) == 0) {
+ ir_fprintf(stderr, "Verify warning: Node %+F is dead but scheduled in block %+F (%s)\n",
+ node, block, get_irg_dump_name(env->irg));
+ env->problem_found = 1;
+ }
+
+ if(be_is_Keep(node)) {
+ /* at least 1 of the keep arguments has to be it schedule
+ * predecessor */
+ int arity = get_irn_arity(node);
+ int problem = 1;
+ ir_node *prev = sched_prev(node);
+ while(be_is_Keep(prev))
+ prev = sched_prev(prev);
+
+ for(i = 0; i < arity; ++i) {
+ ir_node *in = get_irn_n(node, i);
+ in = skip_Proj(in);
+ if(in == prev)
+ problem = 0;
+ }
+ if(problem) {
+ ir_fprintf(stderr, "%+F not scheduled after its pred node in block %+F (%s)\n",
+ node, block, get_irg_dump_name(env->irg));
+ env->problem_found = 1;
}
}
}
- del_pset(uses);
/* check that all delay branches are filled (at least with NOPs) */
if (cfchange_found && delay_branches != 0) {
- ir_fprintf(stderr, "Not all delay slots filled after jump (%d/%d) in block %+F (%s)\n",
+ ir_fprintf(stderr, "Verify warning: Not all delay slots filled after jump (%d/%d) in block %+F (%s)\n",
block, get_irg_dump_name(env->irg));
env->problem_found = 1;
}
}
+static int should_be_scheduled(ir_node *node)
+{
+ if(is_Block(node))
+ return -1;
+
+ if(is_Proj(node))
+ return 0;
+
+ if(get_irn_mode(node) == mode_M) {
+ if(is_Phi(node) || is_Sync(node) || is_Pin(node))
+ return 0;
+ }
+ if(be_is_Keep(node) && get_irn_opcode(get_nodes_block(node)) == iro_Bad)
+ return 0;
+
+ switch(get_irn_opcode(node)) {
+ case iro_End:
+ case iro_NoMem:
+ case iro_Bad:
+ case iro_Unknown:
+ return 0;
+ default:
+ break;
+ }
+
+ if (arch_irn_get_flags(node) & arch_irn_flags_ignore)
+ return -1;
+
+ return 1;
+}
+
+static void check_schedule(ir_node *node, void *data) {
+ be_verify_schedule_env_t *env = data;
+ int should_be;
+ int scheduled;
+
+ should_be = should_be_scheduled(node);
+ if(should_be == -1)
+ return;
+
+ scheduled = bitset_is_set(env->scheduled, get_irn_idx(node)) ? 1 : 0;
+ should_be = should_be ? 1 : 0;
+ if(should_be != scheduled) {
+ ir_fprintf(stderr, "Verify warning: Node %+F in block %+F(%s) should%s be scheduled\n",
+ node, get_nodes_block(node), get_irg_dump_name(env->irg), should_be ? "" : " not");
+ env->problem_found = 1;
+ }
+}
+
/**
* Start a walk over the irg and check schedule.
*/
-int be_verify_schedule(ir_graph *irg)
+int be_verify_schedule(const be_irg_t *birg)
{
be_verify_schedule_env_t env;
env.problem_found = 0;
+ env.irg = be_get_birg_irg(birg);
+ env.scheduled = bitset_alloca(get_irg_last_idx(env.irg));
+
+ irg_block_walk_graph(env.irg, verify_schedule_walker, NULL, &env);
+ /* check if all nodes are scheduled */
+ irg_walk_graph(env.irg, check_schedule, NULL, &env);
+
+ return ! env.problem_found;
+}
+
+
+
+/*--------------------------------------------------------------------------- */
+
+
+
+typedef struct _spill_t {
+ ir_node *spill;
+ ir_entity *ent;
+} spill_t;
+
+typedef struct {
+ ir_graph *irg;
+ set *spills;
+ ir_node **reloads;
+ int problem_found;
+} be_verify_spillslots_env_t;
+
+static int cmp_spill(const void* d1, const void* d2, size_t size) {
+ const spill_t* s1 = d1;
+ const spill_t* s2 = d2;
+ (void) size;
+
+ return s1->spill != s2->spill;
+}
+
+static spill_t *find_spill(be_verify_spillslots_env_t *env, ir_node *node) {
+ spill_t spill;
+
+ spill.spill = node;
+ return set_find(env->spills, &spill, sizeof(spill), HASH_PTR(node));
+}
+
+static spill_t *get_spill(be_verify_spillslots_env_t *env, ir_node *node, ir_entity *ent) {
+ spill_t spill, *res;
+ int hash = HASH_PTR(node);
+
+ spill.spill = node;
+ res = set_find(env->spills, &spill, sizeof(spill), hash);
+
+ if(res == NULL) {
+ spill.ent = ent;
+ res = set_insert(env->spills, &spill, sizeof(spill), hash);
+ }
+
+ return res;
+}
+
+static ir_node *get_memory_edge(const ir_node *node) {
+ int i, arity;
+ ir_node *result = NULL;
+
+ arity = get_irn_arity(node);
+ for(i = arity - 1; i >= 0; --i) {
+ ir_node *arg = get_irn_n(node, i);
+ if(get_irn_mode(arg) == mode_M) {
+ assert(result == NULL);
+ result = arg;
+ }
+ }
+
+ return result;
+}
+
+static
+void collect(be_verify_spillslots_env_t *env, ir_node *node, ir_node *reload, ir_entity* ent);
+
+static
+void be_check_entity(be_verify_spillslots_env_t *env, ir_node *node, ir_entity *ent) {
+ if(ent == NULL) {
+ ir_fprintf(stderr, "Verify warning: Node %+F in block %+F(%s) should have an entity assigned\n",
+ node, get_nodes_block(node), get_irg_dump_name(env->irg));
+ }
+}
+
+static
+void collect_spill(be_verify_spillslots_env_t *env, ir_node *node, ir_node *reload, ir_entity* ent) {
+ ir_entity *spillent = arch_get_frame_entity(node);
+ be_check_entity(env, node, spillent);
+ get_spill(env, node, ent);
+
+ if(spillent != ent) {
+ ir_fprintf(stderr, "Verify warning: Spill %+F has different entity than reload %+F in block %+F(%s)\n",
+ node, reload, get_nodes_block(node), get_irg_dump_name(env->irg));
+ env->problem_found = 1;
+ }
+}
+
+static void collect_memperm(be_verify_spillslots_env_t *env, ir_node *node, ir_node *reload, ir_entity* ent) {
+ int i, arity;
+ spill_t spill, *res;
+ int hash = HASH_PTR(node);
+ int out;
+ ir_node* memperm;
+ ir_entity *spillent;
+
+ assert(is_Proj(node));
+
+ memperm = get_Proj_pred(node);
+ out = get_Proj_proj(node);
+
+ spillent = be_get_MemPerm_out_entity(memperm, out);
+ be_check_entity(env, memperm, spillent);
+ if(spillent != ent) {
+ ir_fprintf(stderr, "Verify warning: MemPerm %+F has different entity than reload %+F in block %+F(%s)\n",
+ node, reload, get_nodes_block(node), get_irg_dump_name(env->irg));
+ env->problem_found = 1;
+ }
+
+ spill.spill = node;
+ res = set_find(env->spills, &spill, sizeof(spill), hash);
+ if(res != NULL) {
+ return;
+ }
+
+ spill.ent = spillent;
+ res = set_insert(env->spills, &spill, sizeof(spill), hash);
+
+ for(i = 0, arity = be_get_MemPerm_entity_arity(memperm); i < arity; ++i) {
+ ir_node* arg = get_irn_n(memperm, i + 1);
+ ir_entity* argent = be_get_MemPerm_in_entity(memperm, i);
+
+ collect(env, arg, memperm, argent);
+ }
+}
+
+static void collect_memphi(be_verify_spillslots_env_t *env, ir_node *node, ir_node *reload, ir_entity *ent) {
+ int i, arity;
+ spill_t spill, *res;
+ int hash = HASH_PTR(node);
+
+ assert(is_Phi(node));
+
+ spill.spill = node;
+ res = set_find(env->spills, &spill, sizeof(spill), hash);
+ if(res != NULL) {
+ return;
+ }
+
+ spill.ent = ent;
+ res = set_insert(env->spills, &spill, sizeof(spill), hash);
+
+ /* is 1 of the arguments a spill? */
+ for(i = 0, arity = get_irn_arity(node); i < arity; ++i) {
+ ir_node* arg = get_irn_n(node, i);
+ collect(env, arg, reload, ent);
+ }
+}
+
+static void collect(be_verify_spillslots_env_t *env, ir_node *node, ir_node *reload, ir_entity* ent) {
+ if(be_is_Spill(node)) {
+ collect_spill(env, node, reload, ent);
+ } else if(is_Proj(node)) {
+ collect_memperm(env, node, reload, ent);
+ } else if(is_Phi(node) && get_irn_mode(node) == mode_M) {
+ collect_memphi(env, node, reload, ent);
+ } else {
+ /* Disabled for now, spills might get transformed by the backend */
+#if 0
+ ir_fprintf(stderr, "Verify warning: No spill, memperm or memphi attached to node %+F found from node %+F in block %+F(%s)\n",
+ node, reload, get_nodes_block(node), get_irg_dump_name(env->irg));
+ env->problem_found = 1;
+#endif
+ }
+}
+
+/**
+ * This walker function searches for reloads and collects all the spills
+ * and memphis attached to them.
+ */
+static void collect_spills_walker(ir_node *node, void *data) {
+ be_verify_spillslots_env_t *env = data;
+
+ /* @@@ ia32_classify returns classification of Proj_pred :-/ */
+ if(is_Proj(node))
+ return;
+
+ if (arch_irn_class_is(node, reload)) {
+ ir_node *spill = get_memory_edge(node);
+ ir_entity *ent;
+
+ if(spill == NULL) {
+ ir_fprintf(stderr, "Verify warning: No spill attached to reload %+F in block %+F(%s)\n",
+ node, get_nodes_block(node), get_irg_dump_name(env->irg));
+ env->problem_found = 1;
+ return;
+ }
+ ent = arch_get_frame_entity(node);
+ be_check_entity(env, node, ent);
+
+ collect(env, spill, node, ent);
+ ARR_APP1(ir_node*, env->reloads, node);
+ }
+}
+
+static void check_spillslot_interference(be_verify_spillslots_env_t *env) {
+ int spillcount = set_count(env->spills);
+ spill_t **spills = alloca(spillcount * sizeof(spills[0]));
+ spill_t *spill;
+ int i;
+
+ for(spill = set_first(env->spills), i = 0; spill != NULL; spill = set_next(env->spills), ++i) {
+ spills[i] = spill;
+ }
+
+ for(i = 0; i < spillcount; ++i) {
+ spill_t *sp1 = spills[i];
+ int i2;
+
+ for(i2 = i+1; i2 < spillcount; ++i2) {
+ spill_t *sp2 = spills[i2];
+
+ if(sp1->ent != sp2->ent)
+ continue;
+
+ if(my_values_interfere(sp1->spill, sp2->spill)) {
+ ir_fprintf(stderr, "Verify warning: Spillslots for %+F in block %+F(%s) and %+F in block %+F(%s) interfere\n",
+ sp1->spill, get_nodes_block(sp1->spill), get_irg_dump_name(env->irg),
+ sp2->spill, get_nodes_block(sp2->spill), get_irg_dump_name(env->irg));
+ env->problem_found = 1;
+ my_values_interfere(sp1->spill, sp2->spill);
+ }
+ }
+ }
+}
+
+static void check_lonely_spills(ir_node *node, void *data) {
+ be_verify_spillslots_env_t *env = data;
+
+ if(be_is_Spill(node) || (is_Proj(node) && be_is_MemPerm(get_Proj_pred(node)))) {
+ spill_t *spill = find_spill(env, node);
+ if(be_is_Spill(node)) {
+ ir_entity *ent = arch_get_frame_entity(node);
+ be_check_entity(env, node, ent);
+ }
+
+ if(spill == NULL) {
+ ir_fprintf(stderr, "Verify warning: Node %+F in block %+F(%s) not connected to a reaload\n",
+ node, get_nodes_block(node), get_irg_dump_name(env->irg));
+ }
+ }
+}
+
+int be_verify_spillslots(ir_graph *irg)
+{
+ be_verify_spillslots_env_t env;
+
+ env.irg = irg;
+ env.spills = new_set(cmp_spill, 10);
+ env.reloads = NEW_ARR_F(ir_node*, 0);
+ env.problem_found = 0;
+
+ irg_walk_graph(irg, collect_spills_walker, NULL, &env);
+ irg_walk_graph(irg, check_lonely_spills, NULL, &env);
+
+ check_spillslot_interference(&env);
+
+ DEL_ARR_F(env.reloads);
+ del_set(env.spills);
+
+ return ! env.problem_found;
+}
+
+
+
+/*--------------------------------------------------------------------------- */
+
+
+
+/**
+ * Check, if two values interfere.
+ * @param a The first value.
+ * @param b The second value.
+ * @return 1, if a and b interfere, 0 if not.
+ */
+static int my_values_interfere(const ir_node *a, const ir_node *b) {
+ const ir_edge_t *edge;
+ ir_node *bb;
+ int a2b = value_dominates(a, b);
+ int b2a = value_dominates(b, a);
+
+ /* If there is no dominance relation, they do not interfere. */
+ if(!a2b && !b2a)
+ return 0;
+
+ /*
+ * Adjust a and b so, that a dominates b if
+ * a dominates b or vice versa.
+ */
+ if(b2a) {
+ const ir_node *t = a;
+ a = b;
+ b = t;
+ }
+
+ bb = get_nodes_block(b);
+
+ /*
+ * Look at all usages of a.
+ * If there's one usage of a in the block of b, then
+ * we check, if this use is dominated by b, if that's true
+ * a and b interfere. Note that b must strictly dominate the user,
+ * since if b is the last user of in the block, b and a do not
+ * interfere.
+ * Uses of a not in b's block can be disobeyed, because the
+ * check for a being live at the end of b's block is already
+ * performed.
+ */
+ foreach_out_edge(a, edge) {
+ const ir_node *user = get_edge_src_irn(edge);
+ if(b == user)
+ continue;
+
+ if(get_irn_opcode(user) == iro_End)
+ continue;
+
+ /* in case of phi arguments we compare with the block the value comes from */
+ if(is_Phi(user)) {
+ ir_node *phiblock = get_nodes_block(user);
+ if(phiblock == bb)
+ continue;
+ user = get_irn_n(phiblock, get_edge_src_pos(edge));
+ }
+
+ if(value_dominates(b, user))
+ return 1;
+ }
+
+ return 0;
+}
+
+
+
+/*--------------------------------------------------------------------------- */
+
+static const arch_env_t *arch_env;
+static ir_graph *irg;
+static be_lv_t *lv;
+static int problem_found;
+static const arch_register_class_t *regclass;
+static ir_node **registers;
+
+static void check_register_constraints(ir_node *node)
+{
+ const arch_register_t *reg;
+ int i, arity;
+
+ /* verify output register */
+ if (arch_get_irn_reg_class_out(node) != NULL) {
+ reg = arch_get_irn_register(node);
+ if (reg == NULL) {
+ ir_fprintf(stderr, "Verify warning: Node %+F in block %+F(%s) should have a register assigned\n",
+ node, get_nodes_block(node), get_irg_dump_name(irg));
+ problem_found = 1;
+ } else if (!arch_register_type_is(reg, joker) && !arch_reg_out_is_allocatable(node, reg)) {
+ ir_fprintf(stderr, "Verify warning: Register %s assigned as output of %+F not allowed (register constraint) in block %+F(%s)\n",
+ reg->name, node, get_nodes_block(node), get_irg_dump_name(irg));
+ problem_found = 1;
+ }
+ }
+
+ /* verify input register */
+ arity = get_irn_arity(node);
+ for (i = 0; i < arity; ++i) {
+ ir_node *pred = get_irn_n(node, i);
+
+ if (is_Unknown(pred))
+ continue;
+
+ if (is_Bad(pred)) {
+ ir_fprintf(stderr, "Verify warning: %+F in block %+F(%s) has Bad as input %d\n",
+ node, get_nodes_block(node), get_irg_dump_name(irg), i);
+ problem_found = 1;
+ continue;
+ }
+
+ if (arch_get_irn_reg_class(node, i) == NULL)
+ continue;
+
+ reg = arch_get_irn_register(pred);
+ if (reg == NULL) {
+ ir_fprintf(stderr, "Verify warning: Node %+F in block %+F(%s) should have a register assigned (%+F input constraint)\n",
+ pred, get_nodes_block(pred), get_irg_dump_name(irg), node);
+ problem_found = 1;
+ continue;
+ } else if (!arch_register_type_is(reg, joker) && ! arch_reg_is_allocatable(node, i, reg)) {
+ ir_fprintf(stderr, "Verify warning: Register %s as input %d of %+F not allowed (register constraint) in block %+F(%s)\n",
+ reg->name, i, node, get_nodes_block(node), get_irg_dump_name(irg));
+ problem_found = 1;
+ }
+ }
+
+ /* phis should be NOPs at this point, which means all input regs
+ * must be the same as the output reg */
+ if (is_Phi(node)) {
+ int i, arity;
+
+ reg = arch_get_irn_register(node);
+
+ arity = get_irn_arity(node);
+ for (i = 0; i < arity; ++i) {
+ ir_node *pred = get_Phi_pred(node, i);
+ const arch_register_t *pred_reg = arch_get_irn_register(pred);
+
+ if (reg != pred_reg && !arch_register_type_is(pred_reg, joker)) {
+ ir_fprintf(stderr, "Verify warning: Input %d of %+F in block %+F(%s) uses register %s instead of %s\n",
+ i, node, get_nodes_block(node), get_irg_dump_name(irg), pred_reg->name, reg->name);
+ problem_found = 1;
+ }
+ }
+ }
+}
+
+static void value_used(ir_node *node) {
+ const arch_register_t *reg;
+ ir_node *reg_node;
+
+ if (arch_get_irn_reg_class_out(node) != regclass)
+ return;
+
+ reg = arch_get_irn_register(node);
+ if (reg->type & arch_register_type_virtual)
+ return;
+
+ reg_node = registers[reg->index];
+ if (reg_node != NULL && reg_node != node) {
+ ir_fprintf(stderr, "Verify warning: Register %s assigned more than once in block %+F(%s) (nodes %+F %+F)\n",
+ reg->name, get_nodes_block(node), get_irg_dump_name(irg),
+ node, reg_node);
+ problem_found = 1;
+ }
+
+ registers[reg->index] = node;
+}
+
+static void value_def(ir_node *node)
+{
+ const arch_register_t *reg;
+ ir_node *reg_node;
+
+ if (arch_get_irn_reg_class_out(node) != regclass)
+ return;
+
+ reg = arch_get_irn_register(node);
+ if (reg->type & arch_register_type_virtual)
+ return;
+
+ reg_node = registers[reg->index];
+
+ if (reg_node != node) {
+ ir_fprintf(stderr, "Verify warning: Node %+F not registered as value for Register %s (but %+F) in block %+F(%s)\n",
+ node, reg->name, reg_node, get_nodes_block(node), get_irg_dump_name(irg));
+ problem_found = 1;
+ }
+ registers[reg->index] = NULL;
+}
+
+static void verify_block_register_allocation(ir_node *block, void *data) {
+ int i, nregclasses;
+ (void) data;
+
+ nregclasses = arch_env_get_n_reg_class(arch_env);
+ for (i = 0; i < nregclasses; ++i) {
+ ir_node *node;
+ int idx, i2, n_regs;
+
+ regclass = arch_env_get_reg_class(arch_env, i);
+
+ assert(lv->nodes && "live sets must be computed");
+
+ n_regs = arch_register_class_n_regs(regclass);
+ registers = alloca(n_regs * sizeof(registers[0]));
+ memset(registers, 0, n_regs * sizeof(registers[0]));
+
+ be_lv_foreach(lv, block, be_lv_state_end, idx) {
+ ir_node *node = be_lv_get_irn(lv, block, idx);
+ value_used(node);
+ }
+
+ sched_foreach_reverse(block, node) {
+ int arity;
+
+ if (get_irn_mode(node) == mode_T) {
+ const ir_edge_t *edge;
+ foreach_out_edge(node, edge) {
+ ir_node *def = get_edge_src_irn(edge);
+ value_def(def);
+ }
+ } else {
+ value_def(node);
+ }
+
+ check_register_constraints(node);
+ if (is_Phi(node))
+ continue;
+
+ arity = get_irn_arity(node);
+ for (i2 = 0; i2 < arity; ++i2) {
+ ir_node *use = get_irn_n(node, i2);
+ value_used(use);
+ }
+ }
+
+ be_lv_foreach(lv, block, be_lv_state_in, idx) {
+ ir_node *node = be_lv_get_irn(lv, block, idx);
+ value_def(node);
+ }
+
+ /* set must be empty now */
+ for (i2 = 0; i2 < n_regs; ++i2) {
+ if (registers[i2] == NULL)
+ continue;
+
+ ir_fprintf(stderr, "Verify warning: Node %+F not live-in and no def found in block %+F(%s)\n",
+ registers[i2], block, get_irg_dump_name(irg));
+ problem_found = 1;
+ }
+ }
+}
+
+int be_verify_register_allocation(const be_irg_t *birg) {
+ arch_env = be_get_birg_arch_env(birg);
+ irg = be_get_birg_irg(birg);
+ lv = be_liveness(birg);
+ problem_found = 0;
+
+ be_liveness_assure_sets(lv);
+ irg_block_walk_graph(irg, verify_block_register_allocation, NULL, NULL);
+
+ be_liveness_free(lv);
+
+ return !problem_found;
+}
+
+
+
+/*--------------------------------------------------------------------------- */
+
+
+
+typedef struct _verify_out_dead_nodes_env {
+ ir_graph *irg;
+ bitset_t *reachable;
+ int problem_found;
+} verify_out_dead_nodes_env;
+
+static void check_out_edges(ir_node *node, verify_out_dead_nodes_env *env) {
+ ir_graph *irg = env->irg;
+ const ir_edge_t* edge;
+
+ if (irn_visited_else_mark(node))
+ return;
+
+ /* we find too many (uncritical) dead nodes in block out edges */
+ if(is_Block(node))
+ return;
+
+ foreach_out_edge(node, edge) {
+ ir_node* src = get_edge_src_irn(edge);
+
+ if(!bitset_is_set(env->reachable, get_irn_idx(src)) && !is_Block(src)) {
+ ir_fprintf(stderr, "Verify warning: Node %+F in block %+F(%s) only reachable through out edges from %+F\n",
+ src, get_nodes_block(src), get_irg_dump_name(irg), node);
+ env->problem_found = 1;
+ continue;
+ }
+
+ check_out_edges(src, env);
+ }
+}
+
+static void set_reachable(ir_node *node, void* data)
+{
+ bitset_t* reachable = data;
+ bitset_set(reachable, get_irn_idx(node));
+}
+
+int be_verify_out_edges(ir_graph *irg) {
+ verify_out_dead_nodes_env env;
+
env.irg = irg;
+ env.reachable = bitset_alloca(get_irg_last_idx(irg));
+ env.problem_found = edges_verify(irg);
- irg_block_walk_graph(irg, verify_schedule_walker, NULL, &env);
+ irg_walk_in_or_dep_graph(irg, set_reachable, NULL, env.reachable);
+ irg_walk_anchors(irg, set_reachable, NULL, env.reachable);
+ inc_irg_visited(irg);
+ check_out_edges(get_irg_start(irg), &env);
return ! env.problem_found;
}
projects / libfirm / blobdiff