#include "set.h"
#include "be.h"
#include "debug.h"
-#include "opt_manage.h"
/** The debug handle. */
DEBUG_ONLY(static firm_dbg_module_t *dbg;)
return 0;
} /* update_exc */
-/** Return the number of uses of an address node */
-#define get_irn_n_uses(adr) get_irn_n_edges(adr)
-
/**
* walker, collects all Load/Store/Proj nodes
*
/* frontend has inserted masking operations after bitfield accesses,
* so we might have to shift the const. */
unsigned char bit_offset = get_entity_offset_bits_remainder(get_Sel_entity(ptr));
- ir_tarval *tv_old = get_Const_tarval(value);
- ir_tarval *tv_offset = new_tarval_from_long(bit_offset, mode_Bu);
- ir_tarval *tv_new = tarval_shl(tv_old, tv_offset);
- value = new_r_Const(irg, tv_new);
+ if (bit_offset != 0) {
+ if (is_Const(value)) {
+ ir_tarval *tv_old = get_Const_tarval(value);
+ ir_tarval *tv_offset = new_tarval_from_long(bit_offset, mode_Bu);
+ ir_tarval *tv_new = tarval_shl(tv_old, tv_offset);
+ value = new_r_Const(irg, tv_new);
+ } else {
+ value = NULL;
+ }
+ }
}
}
}
/* Check, if the address of this load is used more than once.
* If not, more load cannot be removed in any case. */
- if (get_irn_n_uses(ptr) <= 1 && get_irn_n_uses(get_base_and_offset(ptr, &dummy)) <= 1)
+ if (get_irn_n_edges(ptr) <= 1 && get_irn_n_edges(get_base_and_offset(ptr, &dummy)) <= 1)
return res;
/*
/* Check, if the address of this Store is used more than once.
* If not, this Store cannot be removed in any case. */
- if (get_irn_n_uses(ptr) <= 1)
+ if (get_irn_n_edges(ptr) <= 1)
return 0;
mem = get_Store_mem(store);
return follow_Mem_chain_for_Store(store, skip_Proj(mem));
} /* optimize_store */
+/* check if a node has more than one real user. Keepalive edges do not count as
+ * real users */
+static bool has_multiple_users(const ir_node *node)
+{
+ unsigned real_users = 0;
+ foreach_out_edge(node, edge) {
+ ir_node *user = get_edge_src_irn(edge);
+ if (is_End(user))
+ continue;
+ ++real_users;
+ if (real_users > 1)
+ return true;
+ }
+ return false;
+}
+
/**
* walker, optimizes Phi after Stores to identical places:
* Does the following optimization:
/* must be only one user */
projM = get_Phi_pred(phi, 0);
- if (get_irn_n_edges(projM) != 1)
+ if (has_multiple_users(projM))
return 0;
store = skip_Proj(projM);
for (i = 1; i < n; ++i) {
ir_node *pred = get_Phi_pred(phi, i);
- if (get_irn_n_edges(pred) != 1)
+ if (has_multiple_users(pred))
return 0;
pred = skip_Proj(pred);
return res | DF_CHANGED;
} /* optimize_phi */
+static int optimize_conv_load(ir_node *conv)
+{
+ ir_node *op = get_Conv_op(conv);
+ if (!is_Proj(op))
+ return 0;
+ if (has_multiple_users(op))
+ return 0;
+ /* shrink mode of load if possible. */
+ ir_node *load = get_Proj_pred(op);
+ if (!is_Load(load))
+ return 0;
+
+ /* only do it if we are the only user (otherwise the risk is too
+ * great that we end up with 2 loads instead of one). */
+ ir_mode *mode = get_irn_mode(conv);
+ ir_mode *load_mode = get_Load_mode(load);
+ int bits_diff
+ = get_mode_size_bits(load_mode) - get_mode_size_bits(mode);
+ if (mode_is_float(load_mode) || mode_is_float(mode) || bits_diff < 0)
+ return 0;
+
+ if (be_get_backend_param()->byte_order_big_endian) {
+ if (bits_diff % 8 != 0)
+ return 0;
+ ir_graph *irg = get_irn_irg(conv);
+ ir_node *ptr = get_Load_ptr(load);
+ ir_mode *mode = get_irn_mode(ptr);
+ ir_node *delta = new_r_Const_long(irg, mode, bits_diff/8);
+ ir_node *block = get_nodes_block(load);
+ ir_node *add = new_r_Add(block, ptr, delta, mode);
+ set_Load_ptr(load, add);
+ }
+ set_Load_mode(load, mode);
+ set_irn_mode(op, mode);
+ exchange(conv, op);
+ return DF_CHANGED;
+}
+
/**
* walker, do the optimizations
*/
wenv->changes |= optimize_phi(n, wenv);
break;
+ case iro_Conv:
+ wenv->changes |= optimize_conv_load(n);
+ break;
+
default:
break;
}
*/
static node_entry *get_irn_ne(ir_node *irn, loop_env *env)
{
- node_entry *e = (node_entry*)ir_nodehashmap_get(&env->map, irn);
+ node_entry *e = ir_nodehashmap_get(node_entry, &env->map, irn);
if (e == NULL) {
e = OALLOC(&env->obst, node_entry);
entry.ptr = ptr;
entry.mode = load_mode;
- res = (avail_entry_t*)set_find(avail, &entry, sizeof(entry), hash_cache_entry(&entry));
+ res = set_find(avail_entry_t, avail, &entry, sizeof(entry), hash_cache_entry(&entry));
if (res != NULL) {
irn = res->load;
} else {
irn = new_rd_Load(db, pred, get_Phi_pred(phi, pos), ptr, load_mode, cons_none);
entry.load = irn;
- set_insert(avail, &entry, sizeof(entry), hash_cache_entry(&entry));
+ (void)set_insert(avail_entry_t, avail, &entry, sizeof(entry), hash_cache_entry(&entry));
DB((dbg, LEVEL_1, " Created %+F in %+F\n", irn, pred));
}
pe->load = irn;
/*
* do the load store optimization
*/
-static ir_graph_properties_t do_loadstore_opt(ir_graph *irg)
+void optimize_load_store(ir_graph *irg)
{
walk_env_t env;
- ir_graph_properties_t res = 0;
+
+ assure_irg_properties(irg,
+ IR_GRAPH_PROPERTY_NO_UNREACHABLE_CODE
+ | IR_GRAPH_PROPERTY_CONSISTENT_OUT_EDGES
+ | IR_GRAPH_PROPERTY_NO_CRITICAL_EDGES
+ | IR_GRAPH_PROPERTY_CONSISTENT_DOMINANCE
+ | IR_GRAPH_PROPERTY_CONSISTENT_ENTITY_USAGE);
FIRM_DBG_REGISTER(dbg, "firm.opt.ldstopt");
- assert(get_irg_phase_state(irg) != phase_building);
assert(get_irg_pinned(irg) != op_pin_state_floats &&
"LoadStore optimization needs pinned graph");
obstack_free(&env.obst, NULL);
- /* Handle graph state */
- if (env.changes) {
- edges_deactivate(irg);
- }
-
- if (!(env.changes & CF_CHANGED)) {
- res |= IR_GRAPH_PROPERTY_CONSISTENT_DOMINANCE | IR_GRAPH_PROPERTY_NO_BADS;
- }
-
- return res;
-}
-
-static optdesc_t opt_loadstore = {
- "load-store",
- IR_GRAPH_PROPERTY_NO_UNREACHABLE_CODE | IR_GRAPH_PROPERTY_CONSISTENT_OUT_EDGES | IR_GRAPH_PROPERTY_NO_CRITICAL_EDGES | IR_GRAPH_PROPERTY_CONSISTENT_DOMINANCE | IR_GRAPH_PROPERTY_CONSISTENT_ENTITY_USAGE,
- do_loadstore_opt,
-};
-
-int optimize_load_store(ir_graph *irg)
-{
- perform_irg_optimization(irg, &opt_loadstore);
- return 1;
+ confirm_irg_properties(irg,
+ env.changes
+ ? env.changes & CF_CHANGED
+ ? IR_GRAPH_PROPERTIES_NONE
+ : IR_GRAPH_PROPERTIES_CONTROL_FLOW
+ : IR_GRAPH_PROPERTIES_ALL);
}
ir_graph_pass_t *optimize_load_store_pass(const char *name)
{
- return def_graph_pass_ret(name ? name : "ldst", optimize_load_store);
+ return def_graph_pass(name ? name : "ldst", optimize_load_store);
} /* optimize_load_store_pass */
projects / libfirm / blobdiff