/*
- * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
+ * Copyright (C) 1995-2011 University of Karlsruhe. All right reserved.
*
* This file is part of libFirm.
*
* @file
* @brief Scalar replacement of compounds.
* @author Beyhan Veliev, Michael Beck
- * @version $Id$
*/
#include "config.h"
#include <string.h>
+#include <stdbool.h>
#include "iroptimize.h"
#include "scalar_replace.h"
#include "irgmod.h"
#include "irnode_t.h"
#include "irpass.h"
-#include "irtools.h"
+#include "util.h"
#include "xmalloc.h"
#include "debug.h"
#include "error.h"
-#define SET_VNUM(node, vnum) set_irn_link(node, INT_TO_PTR(vnum))
-#define GET_VNUM(node) (unsigned)PTR_TO_INT(get_irn_link(node))
+static unsigned get_vnum(const ir_node *node)
+{
+ return (unsigned)PTR_TO_INT(get_irn_link(node));
+}
+
+static void set_vnum(ir_node *node, unsigned vnum)
+{
+ set_irn_link(node, INT_TO_PTR(vnum));
+}
/**
* A path element entry: it is either an entity
*/
typedef union {
ir_entity *ent;
- tarval *tv;
+ ir_tarval *tv;
} path_elem_t;
/**
* An access path, used to assign value numbers
* to variables that will be scalar replaced.
*/
-typedef struct _path_t {
+typedef struct path_t {
unsigned vnum; /**< The value number. */
- unsigned path_len; /**< The length of the access path. */
+ size_t path_len; /**< The length of the access path. */
path_elem_t path[1]; /**< The path. */
} path_t;
/** The size of a path in bytes. */
-#define PATH_SIZE(p) (sizeof(*(p)) + sizeof((p)->path[0]) * ((p)->path_len - 1))
+static size_t path_size(path_t *p)
+{
+ return sizeof(*p) + sizeof(p->path[0]) * (p->path_len-1);
+}
-typedef struct _scalars_t {
+typedef struct scalars_t {
ir_entity *ent; /**< A entity for scalar replacement. */
- ir_type *ent_owner; /**< The owner of this entity. */
} scalars_t;
DEBUG_ONLY(static firm_dbg_module_t *dbg;)
*
* @return 0 if they are identically
*/
-static int path_cmp(const void *elt, const void *key, size_t size) {
- const path_t *p1 = elt;
- const path_t *p2 = key;
+static int path_cmp(const void *elt, const void *key, size_t size)
+{
+ const path_t *p1 = (const path_t*)elt;
+ const path_t *p2 = (const path_t*)key;
(void) size;
/* we can use memcmp here, because identical tarvals should have identical addresses */
*
* @return 0 if they are identically
*/
-static int ent_cmp(const void *elt, const void *key, size_t size) {
- const scalars_t *c1 = elt;
- const scalars_t *c2 = key;
+static int ent_cmp(const void *elt, const void *key, size_t size)
+{
+ const scalars_t *c1 = (const scalars_t*)elt;
+ const scalars_t *c2 = (const scalars_t*)key;
(void) size;
return c1->ent != c2->ent;
/**
* Calculate a hash value for a path.
*/
-static unsigned path_hash(const path_t *path) {
+static unsigned path_hash(const path_t *path)
+{
unsigned hash = 0;
unsigned i;
*
* @param sel the Sel node that will be checked
*/
-static int is_const_sel(ir_node *sel) {
+static bool is_const_sel(ir_node *sel)
+{
int i, n = get_Sel_n_indexs(sel);
for (i = 0; i < n; ++i) {
ir_node *idx = get_Sel_index(sel, i);
if (!is_Const(idx))
- return 0;
+ return false;
}
- return 1;
+ return true;
}
/**
* @param mode the mode of the Load/Store
* @param ent_mode the mode of the accessed entity
*/
-static int check_load_store_mode(ir_mode *mode, ir_mode *ent_mode) {
+static bool check_load_store_mode(ir_mode *mode, ir_mode *ent_mode)
+{
if (ent_mode != mode) {
if (ent_mode == NULL ||
get_mode_size_bits(ent_mode) != get_mode_size_bits(mode) ||
- get_mode_sort(ent_mode) != get_mode_sort(mode) ||
get_mode_arithmetic(ent_mode) != irma_twos_complement ||
get_mode_arithmetic(mode) != irma_twos_complement)
- return 0;
+ return false;
}
- return 1;
+ return true;
}
/*
* Returns non-zero, if the address of an entity
- * represented by a Sel node (or it's successor Sels) is taken.
+ * represented by a Sel node (or its successor Sels) is taken.
*/
-int is_address_taken(ir_node *sel)
+bool is_address_taken(ir_node *sel)
{
int i, input_nr, k;
ir_mode *emode, *mode;
ir_entity *ent;
if (! is_const_sel(sel))
- return 1;
+ return true;
for (i = get_irn_n_outs(sel) - 1; i >= 0; --i) {
ir_node *succ = get_irn_out(sel, i);
case iro_Load:
/* do not remove volatile variables */
if (get_Load_volatility(succ) == volatility_is_volatile)
- return 1;
+ return true;
/* check if this load is not a hidden conversion */
mode = get_Load_mode(succ);
ent = get_Sel_entity(sel);
emode = get_type_mode(get_entity_type(ent));
if (! check_load_store_mode(mode, emode))
- return 1;
+ return true;
break;
case iro_Store:
/* check that Sel is not the Store's value */
value = get_Store_value(succ);
if (value == sel)
- return 1;
+ return true;
/* do not remove volatile variables */
if (get_Store_volatility(succ) == volatility_is_volatile)
- return 1;
+ return true;
/* check if this Store is not a hidden conversion */
mode = get_irn_mode(value);
ent = get_Sel_entity(sel);
emode = get_type_mode(get_entity_type(ent));
if (! check_load_store_mode(mode, emode))
- return 1;
+ return true;
break;
case iro_Sel: {
ir_entity *entity = get_Sel_entity(succ);
/* we can't handle unions correctly yet -> address taken */
if (is_Union_type(get_entity_owner(entity)))
- return 1;
+ return true;
/* Check the Sel successor of Sel */
res = is_address_taken(succ);
if (res)
- return 1;
+ return true;
break;
}
* One special case: If the Call type tells that it's a
* value parameter, the address is NOT taken.
*/
- return 1;
+ return true;
case iro_Id: {
int res = is_address_taken(succ);
if (res)
- return 1;
+ return true;
break;
}
if (is_Proj(proj) && get_Proj_proj(proj) == input_nr) {
int res = is_address_taken(proj);
if (res)
- return 1;
+ return true;
}
}
}
default:
/* another op, the address is taken */
- return 1;
+ return true;
}
}
- return 0;
+ return false;
}
/**
* @param ent the entity that will be scalar replaced
* @param sel a Sel node that selects some fields of this entity
*/
-static int link_all_leave_sels(ir_entity *ent, ir_node *sel) {
- int i, is_leave = 1;
+static bool link_all_leave_sels(ir_entity *ent, ir_node *sel)
+{
+ int i;
+ bool is_leave = true;
for (i = get_irn_n_outs(sel) - 1; i >= 0; --i) {
ir_node *succ = get_irn_out(sel, i);
if (is_Sel(succ)) {
/* the current leave has further Sel's, no leave */
- is_leave = 0;
+ is_leave = false;
link_all_leave_sels(ent, succ);
} else if (is_Id(succ)) {
is_leave &= link_all_leave_sels(ent, succ);
*
* This function finds variables on the (members of the) frame type
* that can be scalar replaced, because their address is never taken.
- * If such a variable is found, it's entity link will hold a list of all
+ * If such a variable is found, its entity link will hold a list of all
* Sel nodes, that selects the atomic fields of this entity.
* Otherwise, the link will be ADDRESS_TAKEN or NULL.
*
* @return non-zero if at least one entity could be replaced
* potentially
*/
-static int find_possible_replacements(ir_graph *irg) {
+static int find_possible_replacements(ir_graph *irg)
+{
ir_node *irg_frame;
ir_type *frame_tp;
- int i, j, k, static_link_arg;
+ size_t mem_idx;
+ int i;
+ long static_link_arg;
int res = 0;
/*
* First, clear the link field of all interesting entities.
*/
frame_tp = get_irg_frame_type(irg);
- for (i = get_class_n_members(frame_tp) - 1; i >= 0; --i) {
- ir_entity *ent = get_class_member(frame_tp, i);
+ for (mem_idx = get_class_n_members(frame_tp); mem_idx > 0;) {
+ ir_entity *ent = get_class_member(frame_tp, --mem_idx);
set_entity_link(ent, NULL);
}
/* check for inner functions:
* FIXME: need a way to get the argument position for the static link */
static_link_arg = 0;
- for (i = get_class_n_members(frame_tp) - 1; i >= 0; --i) {
- ir_entity *ent = get_class_member(frame_tp, i);
+ for (mem_idx = get_class_n_members(frame_tp); mem_idx > 0;) {
+ ir_entity *ent = get_class_member(frame_tp, --mem_idx);
if (is_method_entity(ent)) {
ir_graph *inner_irg = get_entity_irg(ent);
ir_node *args;
+ int j;
- assure_irg_outs(inner_irg);
+ assure_irg_properties(inner_irg, IR_GRAPH_PROPERTY_CONSISTENT_OUTS);
args = get_irg_args(inner_irg);
for (j = get_irn_n_outs(args) - 1; j >= 0; --j) {
ir_node *arg = get_irn_out(args, j);
if (get_Proj_proj(arg) == static_link_arg) {
+ int k;
for (k = get_irn_n_outs(arg) - 1; k >= 0; --k) {
ir_node *succ = get_irn_out(arg, k);
if (get_entity_link(ent) == ADDRESS_TAKEN)
continue;
- /*
- * Beware: in rare cases even entities on the frame might be
- * volatile. This might happen if the entity serves as a store
- * to a value that must survive a exception. Do not optimize
- * such entities away.
- */
- if (get_entity_volatility(ent) == volatility_is_volatile) {
- set_entity_link(ent, ADDRESS_TAKEN);
- continue;
- }
-
ent_type = get_entity_type(ent);
/* we can handle arrays, structs and atomic types yet */
}
/**
- * Return a path from the Sel node sel to it's root.
+ * Return a path from the Sel node "sel" to its root.
*
* @param sel the Sel node
* @param len the length of the path so far
*/
-static path_t *find_path(ir_node *sel, unsigned len) {
- int pos, i, n;
+static path_t *find_path(ir_node *sel, size_t len)
+{
+ size_t pos;
+ int i, n;
path_t *res;
ir_node *pred = get_Sel_ptr(sel);
} else
res = find_path(pred, len);
+ assert(len <= res->path_len);
pos = res->path_len - len;
res->path[pos++].ent = get_Sel_entity(sel);
DB((dbg, SET_LEVEL_3, " Visiting Sel nodes of entity %+F\n", ent));
/* visit all Sel nodes in the chain of the entity */
- for (sel = get_entity_link(ent); sel; sel = next) {
- next = get_irn_link(sel);
+ for (sel = (ir_node*)get_entity_link(ent); sel != NULL; sel = next) {
+ next = (ir_node*)get_irn_link(sel);
/* we must mark this sel for later */
pset_insert_ptr(sels, sel);
key = find_path(sel, 0);
- path = set_find(pathes, key, PATH_SIZE(key), path_hash(key));
+ path = set_find(path_t, pathes, key, path_size(key), path_hash(key));
if (path) {
- SET_VNUM(sel, path->vnum);
+ set_vnum(sel, path->vnum);
DB((dbg, SET_LEVEL_3, " %+F represents value %u\n", sel, path->vnum));
} else {
key->vnum = vnum++;
- set_insert(pathes, key, PATH_SIZE(key), path_hash(key));
+ set_insert(path_t, pathes, key, path_size(key), path_hash(key));
- SET_VNUM(sel, key->vnum);
+ set_vnum(sel, key->vnum);
DB((dbg, SET_LEVEL_3, " %+F represents value %u\n", sel, key->vnum));
- ARR_EXTO(ir_mode *, *modes, (int)((key->vnum + 15) & ~15));
+ ARR_EXTO(ir_mode *, *modes, (key->vnum + 15) & ~15);
(*modes)[key->vnum] = get_type_mode(get_entity_type(get_Sel_entity(sel)));
return vnum;
}
-/**
- * A list entry for the fixing lists
- */
-typedef struct _list_entry_t {
- ir_node *node; /**< the node that must be fixed */
- unsigned vnum; /**< the value number of this node */
-} list_entry_t;
-
/**
* environment for memory walker
*/
-typedef struct _env_t {
- int nvals; /**< number of values */
- ir_mode **modes; /**< the modes of the values */
- pset *sels; /**< A set of all Sel nodes that have a value number */
+typedef struct env_t {
+ unsigned nvals; /**< number of values */
+ ir_mode **modes; /**< the modes of the values */
+ pset *sels; /**< A set of all Sel nodes that have a value number */
} env_t;
/**
* topological post-walker.
*/
-static void topologic_walker(ir_node *node, void *ctx) {
- env_t *env = ctx;
- ir_node *adr, *block, *mem, *val;
- ir_mode *mode;
- unsigned vnum;
+static void walker(ir_node *node, void *ctx)
+{
+ env_t *env = (env_t*)ctx;
+ ir_graph *irg = get_irn_irg(node);
+ ir_node *addr, *block, *mem, *val;
+ ir_mode *mode;
+ unsigned vnum;
if (is_Load(node)) {
/* a load, check if we can resolve it */
- adr = get_Load_ptr(node);
+ addr = get_Load_ptr(node);
DB((dbg, SET_LEVEL_3, " checking %+F for replacement ", node));
- if (! is_Sel(adr)) {
- DB((dbg, SET_LEVEL_3, "no Sel input (%+F)\n", adr));
+ if (! is_Sel(addr)) {
+ DB((dbg, SET_LEVEL_3, "no Sel input (%+F)\n", addr));
return;
}
- if (! pset_find_ptr(env->sels, adr)) {
- DB((dbg, SET_LEVEL_3, "Sel %+F has no VNUM\n", adr));
+ if (! pset_find_ptr(env->sels, addr)) {
+ DB((dbg, SET_LEVEL_3, "Sel %+F has no VNUM\n", addr));
return;
}
/* ok, we have a Load that will be replaced */
- vnum = GET_VNUM(adr);
- assert(vnum < (unsigned)env->nvals);
+ vnum = get_vnum(addr);
+ assert(vnum < env->nvals);
DB((dbg, SET_LEVEL_3, "replacing by value %u\n", vnum));
Handle this here. */
mode = get_Load_mode(node);
if (mode != get_irn_mode(val))
- val = new_d_Conv(get_irn_dbg_info(node), val, mode);
+ val = new_rd_Conv(get_irn_dbg_info(node), block, val, mode);
mem = get_Load_mem(node);
- turn_into_tuple(node, pn_Load_max);
+ turn_into_tuple(node, pn_Load_max+1);
set_Tuple_pred(node, pn_Load_M, mem);
set_Tuple_pred(node, pn_Load_res, val);
- set_Tuple_pred(node, pn_Load_X_regular, new_Jmp());
- set_Tuple_pred(node, pn_Load_X_except, new_Bad());
+ set_Tuple_pred(node, pn_Load_X_regular, new_r_Jmp(block));
+ set_Tuple_pred(node, pn_Load_X_except, new_r_Bad(irg, mode_X));
} else if (is_Store(node)) {
DB((dbg, SET_LEVEL_3, " checking %+F for replacement ", node));
/* a Store always can be replaced */
- adr = get_Store_ptr(node);
+ addr = get_Store_ptr(node);
- if (! is_Sel(adr)) {
- DB((dbg, SET_LEVEL_3, "no Sel input (%+F)\n", adr));
+ if (! is_Sel(addr)) {
+ DB((dbg, SET_LEVEL_3, "no Sel input (%+F)\n", addr));
return;
}
- if (! pset_find_ptr(env->sels, adr)) {
- DB((dbg, SET_LEVEL_3, "Sel %+F has no VNUM\n", adr));
+ if (! pset_find_ptr(env->sels, addr)) {
+ DB((dbg, SET_LEVEL_3, "Sel %+F has no VNUM\n", addr));
return;
}
- vnum = GET_VNUM(adr);
- assert(vnum < (unsigned)env->nvals);
+ vnum = get_vnum(addr);
+ assert(vnum < env->nvals);
DB((dbg, SET_LEVEL_3, "replacing by value %u\n", vnum));
/* Beware: A Store can contain a hidden conversion in Firm. */
val = get_Store_value(node);
if (get_irn_mode(val) != env->modes[vnum])
- val = new_d_Conv(get_irn_dbg_info(node), val, env->modes[vnum]);
+ val = new_rd_Conv(get_irn_dbg_info(node), block, val, env->modes[vnum]);
set_value(vnum, val);
mem = get_Store_mem(node);
- turn_into_tuple(node, pn_Store_max);
+ turn_into_tuple(node, pn_Store_max+1);
set_Tuple_pred(node, pn_Store_M, mem);
- set_Tuple_pred(node, pn_Store_X_regular, new_Jmp());
- set_Tuple_pred(node, pn_Store_X_except, new_Bad());
+ set_Tuple_pred(node, pn_Store_X_regular, new_r_Jmp(block));
+ set_Tuple_pred(node, pn_Store_X_except, new_r_Bad(irg, mode_X));
}
}
* @param modes A flexible array, containing all the modes of
* the value numbers.
*/
-static void do_scalar_replacements(pset *sels, int nvals, ir_mode **modes) {
+static void do_scalar_replacements(ir_graph *irg, pset *sels, unsigned nvals,
+ ir_mode **modes)
+{
env_t env;
- ssa_cons_start(current_ir_graph, nvals);
+ ssa_cons_start(irg, (int)nvals);
- env.nvals = nvals;
- env.modes = modes;
- env.sels = sels;
+ env.nvals = nvals;
+ env.modes = modes;
+ env.sels = sels;
/*
* second step: walk over the graph blockwise in topological order
* and fill the array as much as possible.
*/
- DB((dbg, SET_LEVEL_3, "Substituting Loads and Stores in %+F\n", current_ir_graph));
- irg_walk_blkwise_graph(current_ir_graph, NULL, topologic_walker, &env);
+ DB((dbg, SET_LEVEL_3, "Substituting Loads and Stores in %+F\n", irg));
+ irg_walk_blkwise_graph(irg, NULL, walker, &env);
- ssa_cons_finish(current_ir_graph);
+ ssa_cons_finish(irg);
}
/*
*
* @param irg The current ir graph.
*/
-int scalar_replacement_opt(ir_graph *irg) {
+void scalar_replacement_opt(ir_graph *irg)
+{
unsigned nvals;
int i;
- scalars_t key, *value;
+ scalars_t key;
ir_node *irg_frame;
ir_mode **modes;
set *set_ent;
pset *sels;
ir_type *ent_type, *frame_tp;
- ir_graph *rem;
- int res = 0;
- rem = current_ir_graph;
- current_ir_graph = irg;
-
- /* Call algorithm that computes the out edges */
- assure_irg_outs(irg);
+ assure_irg_properties(irg,
+ IR_GRAPH_PROPERTY_NO_UNREACHABLE_CODE
+ | IR_GRAPH_PROPERTY_CONSISTENT_OUTS);
/* we use the link field to store the VNUM */
ir_reserve_resources(irg, IR_RESOURCE_IRN_LINK);
- irp_reserve_resources(irp, IR_RESOURCE_ENTITY_LINK);
+ irp_reserve_resources(irp, IRP_RESOURCE_ENTITY_LINK);
/* Find possible scalar replacements */
if (find_possible_replacements(irg)) {
ir_entity *ent = get_Sel_entity(succ);
/* we are only interested in entities on the frame, NOT
- on the value type */
- if (get_entity_owner(ent) != frame_tp)
+ parameters */
+ if (get_entity_owner(ent) != frame_tp
+ || is_parameter_entity(ent))
continue;
if (get_entity_link(ent) == NULL || get_entity_link(ent) == ADDRESS_TAKEN)
ent_type = get_entity_type(ent);
key.ent = ent;
- key.ent_owner = get_entity_owner(ent);
- set_insert(set_ent, &key, sizeof(key), HASH_PTR(key.ent));
+ set_insert(scalars_t, set_ent, &key, sizeof(key), hash_ptr(key.ent));
#ifdef DEBUG_libfirm
if (is_Array_type(ent_type)) {
/* If scalars were found. */
if (nvals > 0) {
- do_scalar_replacements(sels, nvals, modes);
+ do_scalar_replacements(irg, sels, nvals, modes);
- foreach_set(set_ent, value) {
- remove_class_member(value->ent_owner, value->ent);
+ foreach_set(set_ent, scalars_t, value) {
+ free_entity(value->ent);
}
/*
* neither changed control flow, cf-backedges should be still
* consistent.
*/
- set_irg_outs_inconsistent(irg);
- set_irg_loopinfo_inconsistent(irg);
-
- res = 1;
}
del_pset(sels);
del_set(set_ent);
}
ir_free_resources(irg, IR_RESOURCE_IRN_LINK);
- irp_free_resources(irp, IR_RESOURCE_ENTITY_LINK);
+ irp_free_resources(irp, IRP_RESOURCE_ENTITY_LINK);
- current_ir_graph = rem;
- return res;
+ confirm_irg_properties(irg, IR_GRAPH_PROPERTIES_NONE);
}
-ir_graph_pass_t *scalar_replacement_opt_pass(const char *name) {
- return def_graph_pass_ret(name ? name : "scalar_rep",
- scalar_replacement_opt);
+ir_graph_pass_t *scalar_replacement_opt_pass(const char *name)
+{
+ return def_graph_pass(name ? name : "scalar_rep", scalar_replacement_opt);
}
-void firm_init_scalar_replace(void) {
+void firm_init_scalar_replace(void)
+{
FIRM_DBG_REGISTER(dbg, "firm.opt.scalar_replace");
}
projects / libfirm / blobdiff