/*
- * Project: libFIRM
- * File name: ir/lower/lower_calls.c
- * Purpose: lowering of Calls with compound parameters
- * Author: Michael Beck
- * Created:
- * CVS-ID: $Id$
- * Copyright: (c) 1998-2005 Universität Karlsruhe
- * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
+ * Copyright (C) 1995-2011 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 Lowering of Calls with compound parameters and return types.
+ * @author Michael Beck
+ * @version $Id$
*/
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
+#include "lowering.h"
#include "irprog_t.h"
#include "irnode_t.h"
#include "type_t.h"
#include "ircons.h"
#include "irgmod.h"
#include "irgwalk.h"
-#include "typewalk.h"
-#include "lower_calls.h"
-#include "return.h"
+#include "irmemory.h"
#include "irtools.h"
-#include "array.h"
+#include "iroptimize.h"
+#include "array_t.h"
#include "pmap.h"
-#include "xmalloc.h"
+#include "error.h"
/** A type map for def_find_pointer_type. */
static pmap *type_map;
* Default implementation for finding a pointer type for a given element type.
* Simple create a new one.
*/
-static ir_type *def_find_pointer_type(ir_type *e_type, ir_mode *mode, int alignment)
+static ir_type *def_find_pointer_type(ir_type *e_type, ir_mode *mode,
+ int alignment)
{
- ir_type *res;
- pmap_entry *e;
-
- /* Mode and alignment are always identical in all calls to def_find_pointer_type(), so
- we simply can use a map from the element type to the pointer type. */
- e = pmap_find(type_map, e_type);
- if (e)
- res = e->value;
- else {
- res = new_type_pointer(mangle_u(get_type_ident(e_type), new_id_from_chars("Ptr", 3)), e_type, mode);
- set_type_alignment_bytes(res, alignment);
- pmap_insert(type_map, e_type, res);
- }
- return res;
+ /* Mode and alignment are always identical in all calls to def_find_pointer_type(), so
+ we simply can use a map from the element type to the pointer type. */
+ ir_type *res = (ir_type*)pmap_get(type_map, e_type);
+ if (res == NULL || get_type_mode(res) != mode) {
+ res = new_type_pointer(e_type);
+ set_type_mode(res, mode);
+ set_type_alignment_bytes(res, alignment);
+ pmap_insert(type_map, e_type, res);
+ }
+ return res;
}
/**
*/
static ir_type *create_modified_mtd_type(const lower_params_t *lp, ir_type *mtp)
{
- ir_type *lowered, *ptr_tp;
- ir_type **params, **results, *res_tp;
- ir_mode *modes[MAX_REGISTER_RET_VAL];
- int n_ress, n_params, nn_ress, nn_params, i, first_variadic;
- ident *id;
- add_hidden hidden_params;
- variadicity var;
-
- if (is_lowered_type(mtp)) {
- /* the type is already lowered. Not handled yet. */
- assert(0 && "lowered types NYI");
- }
-
- lowered = get_associated_type(mtp);
- if (lowered)
- return lowered;
-
- n_ress = get_method_n_ress(mtp);
- NEW_ARR_A(ir_type *, results, n_ress);
-
- n_params = get_method_n_params(mtp);
- NEW_ARR_A(ir_type *, params, n_params + n_ress);
-
- first_variadic = get_method_first_variadic_param_index(mtp);
-
- hidden_params = lp->hidden_params;
- if (hidden_params == ADD_HIDDEN_SMART &&
- get_method_variadicity(mtp) == variadicity_variadic)
- hidden_params = ADD_HIDDEN_ALWAYS_IN_FRONT;
-
- if (hidden_params == ADD_HIDDEN_ALWAYS_IN_FRONT) {
- /* add hidden in front */
- for (nn_ress = nn_params = i = 0; i < n_ress; ++i) {
- res_tp = get_method_res_type(mtp, i);
-
- if (is_compound_type(res_tp)) {
- int n_regs = 0;
-
- if (lp->flags & LF_SMALL_CMP_IN_REGS)
- n_regs = lp->ret_compound_in_regs(res_tp, modes);
-
- if (n_regs > 0) {
- /* this compound will be returned solely in registers */
- assert(0);
- }
- else {
- /* this compound will be allocated on callers stack and its
- address will be transmitted as a hidden parameter. */
- ptr_tp = lp->find_pointer_type(res_tp, get_modeP_data(), lp->def_ptr_alignment);
- params[nn_params++] = ptr_tp;
- if (lp->flags & LF_RETURN_HIDDEN)
- results[nn_ress++] = ptr_tp;
- }
- }
- else
- results[nn_ress++] = res_tp;
- }
-
- /* move the index of the first variadic parameter */
- first_variadic += nn_params;
-
- for (i = 0; i < n_params; ++i)
- params[nn_params++] = get_method_param_type(mtp, i);
- }
- else {
- /* add hidden parameters last */
- assert(get_method_variadicity(mtp) == variadicity_non_variadic &&
- "Cannot add hidden parameters at end of variadic function");
-
- for (nn_params = 0; nn_params < n_params; ++nn_params)
- params[nn_params] = get_method_param_type(mtp, nn_params);
-
- for (nn_ress = i = 0; i < n_ress; ++i) {
- res_tp = get_method_res_type(mtp, i);
-
- if (is_compound_type(res_tp))
- params[nn_params++] = lp->find_pointer_type(res_tp, get_modeP_data(), lp->def_ptr_alignment);
- else
- results[nn_ress++] = res_tp;
- }
- }
-
- /* create the new type */
- id = mangle_u(new_id_from_chars("L", 1), get_type_ident(mtp));
- lowered = new_d_type_method(id, nn_params, nn_ress, get_type_dbg_info(mtp));
-
- /* fill it */
- for (i = 0; i < nn_params; ++i)
- set_method_param_type(lowered, i, params[i]);
- for (i = 0; i < nn_ress; ++i)
- set_method_res_type(lowered, i, results[i]);
-
- var = get_method_variadicity(mtp);
- set_method_variadicity(lowered, var);
- if (var == variadicity_variadic)
- set_method_first_variadic_param_index(lowered, first_variadic);
-
- /* associate the lowered type with the original one for easier access */
- set_lowered_type(mtp, lowered);
-
- return lowered;
+ ir_type *lowered, *ptr_tp, *value_type;
+ ir_type **params, **results, *res_tp;
+ size_t *param_map;
+ ir_mode *modes[MAX_REGISTER_RET_VAL];
+ size_t n_ress, n_params, nn_ress, nn_params, i;
+ add_hidden hidden_params;
+ int changed = 0;
+ ir_variadicity var;
+
+ if (is_lowered_type(mtp)) {
+ /* the type is already lowered. Not handled yet. */
+ assert(0 && "lowered types NYI");
+ }
+
+ lowered = get_associated_type(mtp);
+ if (lowered != NULL)
+ return lowered;
+
+ n_ress = get_method_n_ress(mtp);
+ NEW_ARR_A(ir_type *, results, n_ress);
+
+ n_params = get_method_n_params(mtp);
+ NEW_ARR_A(ir_type *, params, n_params + n_ress);
+
+ NEW_ARR_A(size_t, param_map, n_params + n_ress);
+
+ hidden_params = lp->hidden_params;
+ if (hidden_params == ADD_HIDDEN_SMART &&
+ get_method_variadicity(mtp) == variadicity_variadic)
+ hidden_params = ADD_HIDDEN_ALWAYS_IN_FRONT;
+
+ if (hidden_params == ADD_HIDDEN_ALWAYS_IN_FRONT) {
+ /* add hidden in front */
+ for (nn_ress = nn_params = i = 0; i < n_ress; ++i) {
+ res_tp = get_method_res_type(mtp, i);
+
+ if (is_compound_type(res_tp)) {
+ int n_regs = 0;
+
+ if (lp->flags & LF_SMALL_CMP_IN_REGS)
+ n_regs = lp->ret_compound_in_regs(res_tp, modes);
+
+ if (n_regs > 0) {
+ /* this compound will be returned solely in registers */
+ panic("Returning compounds in registers not yet implemented");
+ }
+ else {
+ /* this compound will be allocated on callers stack and its
+ address will be transmitted as a hidden parameter. */
+ ptr_tp = lp->find_pointer_type(res_tp, get_modeP_data(), lp->def_ptr_alignment);
+ params[nn_params] = ptr_tp;
+ param_map[nn_params] = n_params + i;
+ ++nn_params;
+ changed++;
+ if (lp->flags & LF_RETURN_HIDDEN)
+ results[nn_ress++] = ptr_tp;
+ }
+ } else {
+ /* scalar result */
+ results[nn_ress++] = res_tp;
+ }
+ }
+
+ for (i = 0; i < n_params; ++i, ++nn_params) {
+ params[nn_params] = get_method_param_type(mtp, i);
+ param_map[nn_params] = i;
+ }
+ } else {
+ /* add hidden parameters last */
+ assert(get_method_variadicity(mtp) == variadicity_non_variadic &&
+ "Cannot add hidden parameters at end of variadic function");
+
+ for (nn_params = 0; nn_params < n_params; ++nn_params) {
+ params[nn_params] = get_method_param_type(mtp, nn_params);
+ param_map[nn_params] = nn_params;
+ }
+
+ for (nn_ress = i = 0; i < n_ress; ++i) {
+ res_tp = get_method_res_type(mtp, i);
+
+ if (is_compound_type(res_tp)) {
+ params[nn_params] = lp->find_pointer_type(res_tp, get_modeP_data(), lp->def_ptr_alignment);
+ param_map[nn_params] = n_params + i;
+ ++nn_params;
+ } else {
+ results[nn_ress++] = res_tp;
+ }
+ }
+ }
+
+ /* create the new type */
+ lowered = new_d_type_method(nn_params, nn_ress, get_type_dbg_info(mtp));
+
+ /* fill it */
+ for (i = 0; i < nn_params; ++i)
+ set_method_param_type(lowered, i, params[i]);
+ for (i = 0; i < nn_ress; ++i)
+ set_method_res_type(lowered, i, results[i]);
+
+ var = get_method_variadicity(mtp);
+ set_method_variadicity(lowered, var);
+
+ /* associate the lowered type with the original one for easier access */
+ if (changed) {
+ set_method_calling_convention(lowered, get_method_calling_convention(mtp) | cc_compound_ret);
+ }
+
+ set_lowered_type(mtp, lowered);
+
+ value_type = get_method_value_param_type(mtp);
+ if (value_type != NULL) {
+ /* set new param positions */
+ for (i = 0; i < nn_params; ++i) {
+ ir_entity *ent = get_method_value_param_ent(lowered, i);
+ size_t pos = param_map[i];
+ ident *id;
+
+ set_entity_link(ent, INT_TO_PTR(pos));
+ if (pos >= n_params) {
+ /* formally return value, ignore for now */
+ continue;
+ }
+
+ id = get_method_param_ident(mtp, pos);
+ if (id != NULL) {
+ set_method_param_ident(lowered, i, id);
+ set_entity_ident(ent, id);
+ }
+ }
+
+ set_lowered_type(value_type, get_method_value_param_type(lowered));
+ }
+
+ return lowered;
}
/**
*/
typedef struct cl_entry cl_entry;
struct cl_entry {
- cl_entry *next; /**< Pointer to the next entry. */
- ir_node *call; /**< Pointer to the Call node. */
- ir_node *copyb; /**< List of all CopyB nodes. */
+ cl_entry *next; /**< Pointer to the next entry. */
+ ir_node *call; /**< Pointer to the Call node. */
+ ir_node *copyb; /**< List of all CopyB nodes. */
};
/**
* Walker environment for fix_args_and_collect_calls().
*/
-typedef struct _wlk_env_t {
- int arg_shift; /**< The Argument index shift for parameters. */
- int first_hidden; /**< The index of the first hidden argument. */
- struct obstack obst; /**< An obstack to allocate the data on. */
- cl_entry *cl_list; /**< The call list. */
- pmap *dummy_map; /**< A map for finding the dummy arguments. */
- unsigned dnr; /**< The dummy index number. */
- const lower_params_t *params; /**< lowering parameters */
+typedef struct wlk_env_t {
+ size_t arg_shift; /**< The Argument index shift for parameters. */
+ size_t first_hidden; /**< The index of the first hidden argument. */
+ struct obstack obst; /**< An obstack to allocate the data on. */
+ cl_entry *cl_list; /**< The call list. */
+ pmap *dummy_map; /**< A map for finding the dummy arguments. */
+ unsigned dnr; /**< The dummy index number. */
+ const lower_params_t *params; /**< Lowering parameters. */
+ ir_type *lowered_mtp; /**< The lowered method type of the current irg if any. */
+ ir_type *value_params; /**< The value params type if any. */
+ unsigned only_local_mem:1; /**< Set if only local memory access was found. */
+ unsigned changed:1; /**< Set if the current graph was changed. */
} wlk_env;
/**
* @param call A Call node.
* @param env The environment.
*/
-static cl_entry *get_Call_entry(ir_node *call, wlk_env *env) {
- cl_entry *res = get_irn_link(call);
- if (res == NULL) {
- cl_entry *res = obstack_alloc(&env->obst, sizeof(*res));
- res->next = env->cl_list;
- res->call = call;
- res->copyb = NULL;
- set_irn_link(call, res);
- env->cl_list = res;
- }
- return res;
+static cl_entry *get_Call_entry(ir_node *call, wlk_env *env)
+{
+ cl_entry *res = (cl_entry*)get_irn_link(call);
+ if (res == NULL) {
+ cl_entry *res = OALLOC(&env->obst, cl_entry);
+ res->next = env->cl_list;
+ res->call = call;
+ res->copyb = NULL;
+ set_irn_link(call, res);
+ env->cl_list = res;
+ }
+ return res;
}
/**
- * Post walker: shift all parameter indeces
+ * Finds the base address of an address by skipping Sel's and address
+ * calculation.
+ *
+ * @param adr the address
+ * @param pEnt points to the base entity if any
+ */
+static ir_node *find_base_adr(ir_node *ptr, ir_entity **pEnt)
+{
+ ir_entity *ent = NULL;
+ assert(mode_is_reference(get_irn_mode(ptr)));
+
+ for (;;) {
+ if (is_Sel(ptr)) {
+ ent = get_Sel_entity(ptr);
+ ptr = get_Sel_ptr(ptr);
+ }
+ else if (is_Add(ptr)) {
+ ir_node *left = get_Add_left(ptr);
+ if (mode_is_reference(get_irn_mode(left)))
+ ptr = left;
+ else
+ ptr = get_Add_right(ptr);
+ ent = NULL;
+ } else if (is_Sub(ptr)) {
+ ptr = get_Sub_left(ptr);
+ ent = NULL;
+ } else {
+ *pEnt = ent;
+ return ptr;
+ }
+ }
+}
+
+/**
+ * Check if a given pointer represents non-local memory.
+ */
+static void check_ptr(ir_node *ptr, wlk_env *env)
+{
+ ir_storage_class_class_t sc;
+ ir_entity *ent;
+
+ /* still alias free */
+ ptr = find_base_adr(ptr, &ent);
+ sc = get_base_sc(classify_pointer(ptr, ent));
+ if (sc != ir_sc_localvar && sc != ir_sc_malloced) {
+ /* non-local memory access */
+ env->only_local_mem = 0;
+ }
+}
+
+/**
+ * Post walker: shift all parameter indexes
* and collect Calls with compound returns in the call list.
+ * If a non-alias free memory access is found, reset the alias free
+ * flag.
*/
-static void fix_args_and_collect_calls(ir_node *n, void *ctx) {
- wlk_env *env = ctx;
- int i;
- ir_type *ctp;
- ir_op *op = get_irn_op(n);
-
- if (env->arg_shift > 0 && op == op_Proj) {
- ir_node *pred = get_Proj_pred(n);
-
- /* Fix the argument numbers */
- if (pred == get_irg_args(current_ir_graph)) {
- long pnr = get_Proj_proj(n);
- set_Proj_proj(n, pnr + env->arg_shift);
- }
- }
- else if (op == op_Call) {
- ctp = get_Call_type(n);
- if (env->params->flags & LF_COMPOUND_RETURN) {
- /* check for compound returns */
- for (i = get_method_n_ress(ctp) -1; i >= 0; --i) {
- if (is_compound_type(get_method_res_type(ctp, i))) {
- /*
- * This is a call with a compound return. As the result
- * might be ignored, we must put it in the list.
- */
- (void)get_Call_entry(n, env);
- break;
- }
- }
- }
- }
- else if (op == op_CopyB && env->params->flags & LF_COMPOUND_RETURN) {
- /* check for compound returns */
- ir_node *src = get_CopyB_src(n);
- /* older scheme using value_res_ent */
- if (is_Sel(src)) {
- ir_node *proj = get_Sel_ptr(src);
- if (is_Proj(proj) && get_Proj_proj(proj) == pn_Call_P_value_res_base) {
- ir_node *call = get_Proj_pred(proj);
- if (is_Call(call)) {
- /* found a CopyB from compound Call result */
- cl_entry *e = get_Call_entry(call, env);
- set_irn_link(n, e->copyb);
- e->copyb = n;
- }
- }
- } else
- /* new scheme: compound results are determined by the call type only */
- if (is_Proj(src)) {
- ir_node *proj = get_Proj_pred(src);
- if (is_Proj(proj) && get_Proj_proj(proj) == pn_Call_T_result) {
- ir_node *call = get_Proj_pred(proj);
- if (is_Call(call)) {
- ctp = get_Call_type(call);
- if (is_compound_type(get_method_res_type(ctp, get_Proj_proj(src)))) {
- /* found a CopyB from compound Call result */
- cl_entry *e = get_Call_entry(call, env);
- set_irn_link(n, e->copyb);
- e->copyb = n;
- }
- }
- }
- }
- }
+static void fix_args_and_collect_calls(ir_node *n, void *ctx)
+{
+ wlk_env *env = (wlk_env*)ctx;
+ ir_type *ctp;
+ ir_node *ptr;
+
+ switch (get_irn_opcode(n)) {
+ case iro_Sel:
+ if (env->lowered_mtp != NULL && env->value_params != NULL) {
+ ir_entity *ent = get_Sel_entity(n);
+
+ if (get_entity_owner(ent) == env->value_params) {
+ size_t pos = get_struct_member_index(env->value_params, ent) + env->arg_shift;
+ ir_entity *new_ent;
+
+ new_ent = get_method_value_param_ent(env->lowered_mtp, pos);
+ set_entity_ident(new_ent, get_entity_ident(ent));
+ set_Sel_entity(n, new_ent);
+ }
+ }
+ break;
+ case iro_Load:
+ case iro_Store:
+ if (env->only_local_mem) {
+ ptr = get_irn_n(n, 1);
+ check_ptr(ptr, env);
+ }
+ break;
+ case iro_Proj:
+ if (env->arg_shift > 0) {
+ ir_node *pred = get_Proj_pred(n);
+
+ /* Fix the argument numbers */
+ if (pred == get_irg_args(current_ir_graph)) {
+ long pnr = get_Proj_proj(n);
+ set_Proj_proj(n, pnr + env->arg_shift);
+ env->changed = 1;
+ }
+ }
+ break;
+ case iro_Call:
+ if (! is_self_recursive_Call(n)) {
+ /* any non self recursive call might access global memory */
+ env->only_local_mem = 0;
+ }
+
+ ctp = get_Call_type(n);
+ if (env->params->flags & LF_COMPOUND_RETURN) {
+ /* check for compound returns */
+ size_t i, n_res;
+ for (i = 0, n_res = get_method_n_ress(ctp); i < n_res; ++i) {
+ if (is_compound_type(get_method_res_type(ctp, i))) {
+ /*
+ * This is a call with a compound return. As the result
+ * might be ignored, we must put it in the list.
+ */
+ (void)get_Call_entry(n, env);
+ break;
+ }
+ }
+ }
+ break;
+ case iro_CopyB:
+ if (env->only_local_mem) {
+ check_ptr(get_CopyB_src(n), env);
+ if (env->only_local_mem)
+ check_ptr(get_CopyB_dst(n), env);
+ }
+ if (env->params->flags & LF_COMPOUND_RETURN) {
+ /* check for compound returns */
+ ir_node *src = get_CopyB_src(n);
+ /* older scheme using value_res_ent */
+ if (is_Sel(src)) {
+ ir_node *proj = get_Sel_ptr(src);
+ if (is_Proj(proj) && get_Proj_proj(proj) == pn_Call_P_value_res_base) {
+ ir_node *call = get_Proj_pred(proj);
+ if (is_Call(call)) {
+ /* found a CopyB from compound Call result */
+ cl_entry *e = get_Call_entry(call, env);
+ set_irn_link(n, e->copyb);
+ e->copyb = n;
+ }
+ }
+ } else {
+ /* new scheme: compound results are determined by the call type only */
+ if (is_Proj(src)) {
+ ir_node *proj = get_Proj_pred(src);
+ if (is_Proj(proj) && get_Proj_proj(proj) == pn_Call_T_result) {
+ ir_node *call = get_Proj_pred(proj);
+ if (is_Call(call)) {
+ ctp = get_Call_type(call);
+ if (is_compound_type(get_method_res_type(ctp, get_Proj_proj(src)))) {
+ /* found a CopyB from compound Call result */
+ cl_entry *e = get_Call_entry(call, env);
+ set_irn_link(n, e->copyb);
+ e->copyb = n;
+ }
+ }
+ }
+ }
+ }
+ }
+ break;
+ default:
+ /* do nothing */
+ break;
+ }
}
/**
*/
static int is_compound_address(ir_type *ft, ir_node *adr)
{
- ir_entity *ent;
-
- if (! is_Sel(adr))
- return 0;
- if (get_Sel_n_indexs(adr) != 0)
- return 0;
- ent = get_Sel_entity(adr);
- return get_entity_owner(ent) == ft;
+ ir_entity *ent;
+
+ if (! is_Sel(adr))
+ return 0;
+ if (get_Sel_n_indexs(adr) != 0)
+ return 0;
+ ent = get_Sel_entity(adr);
+ return get_entity_owner(ent) == ft;
}
/** A pair for the copy-return-optimization. */
typedef struct cr_pair {
- ir_entity *ent; /**< the entity than can be removed from the frame */
- ir_node *arg; /**< the argument that replaces the entities address */
+ ir_entity *ent; /**< the entity than can be removed from the frame */
+ ir_node *arg; /**< the argument that replaces the entities address */
} cr_pair;
/**
* Post walker: fixes all entities addresses for the copy-return
* optimization.
*
- * Note: We expect the length of the cr_pair array (ie number of compound
+ * Note: We expect the length of the cr_pair array (i.e. number of compound
* return values) to be 1 (C, C++) in almost all cases, so ignore the
* linear search complexity here.
*/
-static void do_copy_return_opt(ir_node *n, void *ctx) {
- cr_pair *arr = ctx;
- int i;
-
- if (is_Sel(n)) {
- ir_entity *ent = get_Sel_entity(n);
-
- for (i = ARR_LEN(arr) - 1; i >= 0; --i) {
- if (ent == arr[i].ent) {
- exchange(n, arr[i].arg);
- break;
- }
- }
- }
+static void do_copy_return_opt(ir_node *n, void *ctx)
+{
+ if (is_Sel(n)) {
+ ir_entity *ent = get_Sel_entity(n);
+ cr_pair *arr = (cr_pair*)ctx;
+ size_t i, l;
+
+ for (i = 0, l = ARR_LEN(arr); i < l; ++i) {
+ if (ent == arr[i].ent) {
+ exchange(n, arr[i].arg);
+ break;
+ }
+ }
+ }
}
/**
*/
static ir_node *get_dummy_sel(ir_graph *irg, ir_node *block, ir_type *tp, wlk_env *env)
{
- ir_entity *ent;
- pmap_entry *e;
-
- /* use a map the check if we already create such an entity */
- e = pmap_find(env->dummy_map, tp);
- if (e)
- ent = e->value;
- else {
- ir_type *ft = get_irg_frame_type(irg);
- char buf[16];
-
- snprintf(buf, sizeof(buf), "dummy.%u", env->dnr++);
- ent = new_entity(ft, new_id_from_str(buf), tp);
- pmap_insert(env->dummy_map, tp, ent);
-
- if (get_type_state(ft) == layout_fixed) {
- /* Fix the layout again */
- assert(0 && "Fixed layout not implemented");
- }
- }
- return new_r_simpleSel(
- irg,
- block,
- get_irg_no_mem(irg),
- get_irg_frame(irg),
- ent);
+ ir_entity *ent;
+ pmap_entry *e;
+
+ /* use a map the check if we already create such an entity */
+ e = pmap_find(env->dummy_map, tp);
+ if (e)
+ ent = (ir_entity*)e->value;
+ else {
+ ir_type *ft = get_irg_frame_type(irg);
+ char buf[16];
+
+ snprintf(buf, sizeof(buf), "dummy.%u", env->dnr++);
+ ent = new_entity(ft, new_id_from_str(buf), tp);
+ pmap_insert(env->dummy_map, tp, ent);
+
+ if (get_type_state(ft) == layout_fixed) {
+ /* Fix the layout again */
+ assert(0 && "Fixed layout not implemented");
+ }
+ }
+ return new_r_simpleSel(
+ block,
+ get_irg_no_mem(irg),
+ get_irg_frame(irg),
+ ent);
}
/**
* @param entry the call list
* @param env the environment
*/
-static void add_hidden_param(ir_graph *irg, int n_com, ir_node **ins, cl_entry *entry, wlk_env *env)
+static void add_hidden_param(ir_graph *irg, size_t n_com, ir_node **ins, cl_entry *entry, wlk_env *env)
{
- ir_node *p, *n, *src, *mem;
- ir_entity *ent;
- ir_type *owner;
- int idx, n_args;
-
- n_args = 0;
- for (p = entry->copyb; p; p = n) {
- n = get_irn_link(p);
- src = get_CopyB_src(p);
-
- /* old scheme using value_res_ent */
- if (is_Sel(src)) {
- ent = get_Sel_entity(src);
- owner = get_entity_owner(ent);
-
- /* find the hidden parameter index */
- for (idx = 0; idx < get_struct_n_members(owner); ++idx)
- if (get_struct_member(owner, idx) == ent)
- break;
- assert(idx < get_struct_n_members(owner));
- }
- else
-
- /* new scheme: compound returns are determined by the call type and are Proj's */
- idx = get_Proj_proj(src);
-
- ins[idx] = get_CopyB_dst(p);
- mem = get_CopyB_mem(p);
-
- /* get rid of the CopyB */
- turn_into_tuple(p, pn_CopyB_max);
- set_Tuple_pred(p, pn_CopyB_M_regular, mem);
- set_Tuple_pred(p, pn_CopyB_M_except, get_irg_bad(irg));
- set_Tuple_pred(p, pn_CopyB_X_except, get_irg_bad(irg));
- ++n_args;
- }
-
- /* now create dummy entities for function with ignored return value */
- if (n_args < n_com) {
- ir_type *ctp = get_Call_type(entry->call);
- int i, j;
-
- if (is_lowered_type(ctp))
- ctp = get_associated_type(ctp);
-
- for (j = i = 0; i < get_method_n_ress(ctp); ++i) {
- ir_type *rtp = get_method_res_type(ctp, i);
- if (is_compound_type(rtp)) {
- if (ins[j] == NULL)
- ins[j] = get_dummy_sel(irg, get_nodes_block(entry->call), rtp, env);
- ++j;
- }
- }
- }
+ ir_node *p, *n, *src, *mem, *blk;
+ ir_entity *ent;
+ ir_type *owner;
+ size_t n_args;
+
+ n_args = 0;
+ for (p = entry->copyb; p; p = n) {
+ size_t idx;
+ n = (ir_node*)get_irn_link(p);
+ src = get_CopyB_src(p);
+
+ /* old scheme using value_res_ent */
+ if (is_Sel(src)) {
+ ent = get_Sel_entity(src);
+ owner = get_entity_owner(ent);
+
+ /* find the hidden parameter index */
+ for (idx = 0; idx < get_struct_n_members(owner); ++idx)
+ if (get_struct_member(owner, idx) == ent)
+ break;
+ assert(idx < get_struct_n_members(owner));
+ } else {
+ /* new scheme: compound returns are determined by the call type and are Proj's */
+ idx = get_Proj_proj(src);
+ }
+
+ ins[idx] = get_CopyB_dst(p);
+ mem = get_CopyB_mem(p);
+ blk = get_nodes_block(p);
+
+ /* get rid of the CopyB */
+ turn_into_tuple(p, pn_CopyB_max);
+ set_Tuple_pred(p, pn_CopyB_M, mem);
+ set_Tuple_pred(p, pn_CopyB_X_regular, new_r_Jmp(blk));
+ set_Tuple_pred(p, pn_CopyB_X_except, get_irg_bad(irg));
+ ++n_args;
+ }
+
+ /* now create dummy entities for function with ignored return value */
+ if (n_args < n_com) {
+ ir_type *ctp = get_Call_type(entry->call);
+ size_t i;
+ size_t j;
+
+ if (is_lowered_type(ctp))
+ ctp = get_associated_type(ctp);
+
+ for (j = i = 0; i < get_method_n_ress(ctp); ++i) {
+ ir_type *rtp = get_method_res_type(ctp, i);
+ if (is_compound_type(rtp)) {
+ if (ins[j] == NULL)
+ ins[j] = get_dummy_sel(irg, get_nodes_block(entry->call), rtp, env);
+ ++j;
+ }
+ }
+ }
}
/**
* @param irg the graph
* @param env the environment
*/
-static void fix_call_list(ir_graph *irg, wlk_env *env) {
- const lower_params_t *lp = env->params;
- cl_entry *p;
- ir_node *call, **new_in;
- ir_type *ctp, *lowered_mtp;
- add_hidden hidden_params;
- int i, n_params, n_com, pos;
-
- new_in = NEW_ARR_F(ir_node *, 0);
- for (p = env->cl_list; p; p = p->next) {
- call = p->call;
- ctp = get_Call_type(call);
- lowered_mtp = create_modified_mtd_type(lp, ctp);
- set_Call_type(call, lowered_mtp);
-
- hidden_params = lp->hidden_params;
- if (hidden_params == ADD_HIDDEN_SMART &&
- get_method_variadicity(ctp) == variadicity_variadic)
- hidden_params = ADD_HIDDEN_ALWAYS_IN_FRONT;
-
- n_params = get_Call_n_params(call);
-
- n_com = 0;
- for (i = get_method_n_ress(ctp) - 1; i >= 0; --i) {
- if (is_compound_type(get_method_res_type(ctp, i)))
- ++n_com;
- }
- pos = 2;
- ARR_RESIZE(ir_node *, new_in, n_params + n_com + pos);
- memset(new_in, 0, sizeof(*new_in) * (n_params + n_com + pos));
- if (hidden_params == ADD_HIDDEN_ALWAYS_IN_FRONT) {
- add_hidden_param(irg, n_com, &new_in[pos], p, env);
- pos += n_com;
- }
- /* copy all other parameters */
- for (i = 0; i < n_params; ++i)
- new_in[pos++] = get_Call_param(call, i);
- if (hidden_params == ADD_HIDDEN_ALWAYS_LAST) {
- add_hidden_param(irg, n_com, &new_in[pos], p, env);
- pos += n_com;
- }
- new_in[0] = get_Call_mem(call);
- new_in[1] = get_Call_ptr(call);
-
- set_irn_in(call, n_params + n_com + 2, new_in);
- }
+static void fix_call_list(ir_graph *irg, wlk_env *env)
+{
+ const lower_params_t *lp = env->params;
+ cl_entry *p;
+ ir_node *call, **new_in;
+ ir_type *ctp, *lowered_mtp;
+ add_hidden hidden_params;
+ size_t i, n_res, n_params, n_com, pos;
+
+ new_in = NEW_ARR_F(ir_node *, 0);
+ for (p = env->cl_list; p; p = p->next) {
+ call = p->call;
+ ctp = get_Call_type(call);
+ lowered_mtp = create_modified_mtd_type(lp, ctp);
+ set_Call_type(call, lowered_mtp);
+
+ hidden_params = lp->hidden_params;
+ if (hidden_params == ADD_HIDDEN_SMART &&
+ get_method_variadicity(ctp) == variadicity_variadic)
+ hidden_params = ADD_HIDDEN_ALWAYS_IN_FRONT;
+
+ n_params = get_Call_n_params(call);
+
+ n_com = 0;
+ for (i = 0, n_res = get_method_n_ress(ctp); i < n_res; ++i) {
+ if (is_compound_type(get_method_res_type(ctp, i)))
+ ++n_com;
+ }
+ pos = 2;
+ ARR_RESIZE(ir_node *, new_in, n_params + n_com + pos);
+ memset(new_in, 0, sizeof(*new_in) * (n_params + n_com + pos));
+ if (hidden_params == ADD_HIDDEN_ALWAYS_IN_FRONT) {
+ add_hidden_param(irg, n_com, &new_in[pos], p, env);
+ pos += n_com;
+ }
+ /* copy all other parameters */
+ for (i = 0; i < n_params; ++i)
+ new_in[pos++] = get_Call_param(call, i);
+ if (hidden_params == ADD_HIDDEN_ALWAYS_LAST) {
+ add_hidden_param(irg, n_com, &new_in[pos], p, env);
+ pos += n_com;
+ }
+ new_in[0] = get_Call_mem(call);
+ new_in[1] = get_Call_ptr(call);
+
+ set_irn_in(call, n_params + n_com + 2, new_in);
+ }
}
/**
*/
static void transform_irg(const lower_params_t *lp, ir_graph *irg)
{
- ir_entity *ent = get_irg_entity(irg);
- ir_type *mtp, *lowered_mtp, *tp, *ft;
- int i, j, k, n_ress = 0, n_ret_com = 0, n_cr_opt;
- ir_node **new_in, *ret, *endbl, *bl, *mem, *copy;
- cr_pair *cr_opt;
- wlk_env env;
- add_hidden hidden_params;
-
- assert(ent && "Cannot tranform graph without an entity");
- assert(get_irg_phase_state(irg) == phase_high && "call lowering must be done in phase high");
-
- mtp = get_entity_type(ent);
-
- if (lp->flags & LF_COMPOUND_RETURN) {
- /* calculate the number of compound returns */
- n_ress = get_method_n_ress(mtp);
- for (n_ret_com = i = 0; i < n_ress; ++i) {
- tp = get_method_res_type(mtp, i);
-
- if (is_compound_type(tp))
- ++n_ret_com;
- }
- }
-
- if (n_ret_com) {
- /* much easier if we have only one return */
- normalize_one_return(irg);
-
- /* This graph has a compound argument. Create a new type */
- lowered_mtp = create_modified_mtd_type(lp, mtp);
- set_entity_type(ent, lowered_mtp);
-
- hidden_params = lp->hidden_params;
- if (hidden_params == ADD_HIDDEN_SMART &&
- get_method_variadicity(mtp) == variadicity_variadic)
- hidden_params = ADD_HIDDEN_ALWAYS_IN_FRONT;
-
- if (hidden_params == ADD_HIDDEN_ALWAYS_IN_FRONT) {
- /* hidden arguments are added first */
- env.arg_shift = n_ret_com;
- env.first_hidden = 0;
- }
- else {
- /* hidden arguments are added last */
- env.arg_shift = 0;
- env.first_hidden = get_method_n_params(mtp);
- }
- }
- else {
- /* we must only search for calls */
- env.arg_shift = 0;
- }
- obstack_init(&env.obst);
- env.cl_list = NULL;
- env.dummy_map = pmap_create_ex(8);
- env.dnr = 0;
- env.params = lp;
-
- /* scan the code, fix argument numbers and collect calls. */
- irg_walk_graph(irg, firm_clear_link, fix_args_and_collect_calls, &env);
-
- /* fix all calls */
- if (env.cl_list)
- fix_call_list(irg, &env);
-
- if (n_ret_com) {
- /*
- * Now fix the Return node of the current graph.
- */
-
- /* STEP 1: find the return. This is simple, we have normalized the graph. */
- endbl = get_irg_end_block(irg);
- ret = NULL;
- for (i = get_Block_n_cfgpreds(endbl) - 1; i >= 0; --i) {
- ir_node *pred = get_Block_cfgpred(endbl, i);
-
- if (is_Return(pred)) {
- ret = pred;
- break;
- }
- }
- /* there should always be a return */
- assert(ret);
-
- /*
- * STEP 2: fix it. For all compound return values add a CopyB,
- * all others are copied.
- */
- NEW_ARR_A(ir_node *, new_in, n_ress + 1);
-
- bl = get_nodes_block(ret);
- mem = get_Return_mem(ret);
-
- ft = get_irg_frame_type(irg);
- NEW_ARR_A(cr_pair, cr_opt, n_ret_com);
- n_cr_opt = 0;
- for (j = 1, i = k = 0; i < n_ress; ++i) {
- ir_node *pred = get_Return_res(ret, i);
- tp = get_method_res_type(mtp, i);
-
- if (is_compound_type(tp)) {
- ir_node *arg = get_irg_args(irg);
- arg = new_r_Proj(irg, get_nodes_block(arg), arg, mode_P_data, env.first_hidden + k);
- ++k;
-
- if (is_compound_address(ft, pred)) {
- /* we can do the copy-return optimization here */
- cr_opt[n_cr_opt].ent = get_Sel_entity(pred);
- cr_opt[n_cr_opt].arg = arg;
- ++n_cr_opt;
- }
- else { /* copy-return optimization is impossible, do the copy. */
- copy = new_r_CopyB(
- irg, bl,
- mem,
- arg,
- pred,
- tp
- );
- mem = new_r_Proj(irg, bl, copy, mode_M, pn_CopyB_M_regular);
- }
- if (lp->flags & LF_RETURN_HIDDEN) {
- new_in[j] = arg;
- ++j;
- }
- }
- else { /* scalar return value */
- new_in[j] = pred;
- ++j;
- }
- }
- /* replace the in of the Return */
- new_in[0] = mem;
- set_irn_in(ret, j, new_in);
-
- if (n_cr_opt > 0) {
- irg_walk_graph(irg, NULL, do_copy_return_opt, cr_opt);
-
- for (i = ARR_LEN(cr_opt) - 1; i >= 0; --i) {
- remove_class_member(ft, cr_opt[i].ent);
- }
- }
- } /* if (n_ret_com) */
-
- pmap_destroy(env.dummy_map);
- obstack_free(&env.obst, NULL);
+ ir_graph *rem = current_ir_graph;
+ ir_entity *ent = get_irg_entity(irg);
+ ir_type *mtp, *lowered_mtp, *tp, *ft;
+ size_t i, j, k, n_ress = 0, n_ret_com = 0;
+ size_t n_cr_opt;
+ ir_node **new_in, *ret, *endbl, *bl, *mem, *copy;
+ cr_pair *cr_opt;
+ wlk_env env;
+ add_hidden hidden_params;
+
+ current_ir_graph = irg;
+
+ assert(ent && "Cannot transform graph without an entity");
+ assert(get_irg_phase_state(irg) == phase_high && "call lowering must be done in phase high");
+
+ mtp = get_entity_type(ent);
+
+ if (lp->flags & LF_COMPOUND_RETURN) {
+ /* calculate the number of compound returns */
+ n_ress = get_method_n_ress(mtp);
+ for (n_ret_com = i = 0; i < n_ress; ++i) {
+ tp = get_method_res_type(mtp, i);
+
+ if (is_compound_type(tp))
+ ++n_ret_com;
+ }
+ }
+
+ if (n_ret_com) {
+ /* much easier if we have only one return */
+ normalize_one_return(irg);
+
+ /* This graph has a compound argument. Create a new type */
+ lowered_mtp = create_modified_mtd_type(lp, mtp);
+ set_entity_type(ent, lowered_mtp);
+
+ hidden_params = lp->hidden_params;
+ if (hidden_params == ADD_HIDDEN_SMART &&
+ get_method_variadicity(mtp) == variadicity_variadic)
+ hidden_params = ADD_HIDDEN_ALWAYS_IN_FRONT;
+
+ if (hidden_params == ADD_HIDDEN_ALWAYS_IN_FRONT) {
+ /* hidden arguments are added first */
+ env.arg_shift = n_ret_com;
+ env.first_hidden = 0;
+ } else {
+ /* hidden arguments are added last */
+ env.arg_shift = 0;
+ env.first_hidden = get_method_n_params(mtp);
+ }
+ } else {
+ /* we must only search for calls */
+ env.arg_shift = 0;
+ lowered_mtp = NULL;
+ }
+ obstack_init(&env.obst);
+ env.cl_list = NULL;
+ env.dummy_map = pmap_create_ex(8);
+ env.dnr = 0;
+ env.params = lp;
+ env.lowered_mtp = lowered_mtp;
+ env.value_params = get_method_value_param_type(mtp);
+ env.only_local_mem = 1;
+ env.changed = 0;
+
+ /* scan the code, fix argument numbers and collect calls. */
+ irg_walk_graph(irg, firm_clear_link, fix_args_and_collect_calls, &env);
+
+ /* fix all calls */
+ if (env.cl_list) {
+ fix_call_list(irg, &env);
+ env.changed = 1;
+ }
+
+ if (n_ret_com) {
+ int idx;
+
+ /*
+ * Now fix the Return node of the current graph.
+ */
+ env.changed = 1;
+
+ /* STEP 1: find the return. This is simple, we have normalized the graph. */
+ endbl = get_irg_end_block(irg);
+ ret = NULL;
+ for (idx = get_Block_n_cfgpreds(endbl) - 1; idx >= 0; --idx) {
+ ir_node *pred = get_Block_cfgpred(endbl, idx);
+
+ if (is_Return(pred)) {
+ ret = pred;
+ break;
+ }
+ }
+ /* there should always be a return */
+ assert(ret);
+
+ /*
+ * STEP 2: fix it. For all compound return values add a CopyB,
+ * all others are copied.
+ */
+ NEW_ARR_A(ir_node *, new_in, n_ress + 1);
+
+ bl = get_nodes_block(ret);
+ mem = get_Return_mem(ret);
+
+ ft = get_irg_frame_type(irg);
+ NEW_ARR_A(cr_pair, cr_opt, n_ret_com);
+ n_cr_opt = 0;
+ for (j = 1, i = k = 0; i < n_ress; ++i) {
+ ir_node *pred = get_Return_res(ret, i);
+ tp = get_method_res_type(mtp, i);
+
+ if (is_compound_type(tp)) {
+ ir_node *arg = get_irg_args(irg);
+ arg = new_r_Proj(arg, mode_P_data, env.first_hidden + k);
+ ++k;
+
+ if (is_Unknown(pred)) {
+ /* The Return(Unknown) is the Firm construct for a missing return.
+ Do nothing. */
+ } else {
+ /**
+ * Sorrily detecting that copy-return is possible isn't that simple.
+ * We must check, that the hidden address is alias free during the whole
+ * function.
+ * A simple heuristic: all Loads/Stores inside
+ * the function access only local frame.
+ */
+ if (env.only_local_mem && is_compound_address(ft, pred)) {
+ /* we can do the copy-return optimization here */
+ cr_opt[n_cr_opt].ent = get_Sel_entity(pred);
+ cr_opt[n_cr_opt].arg = arg;
+ ++n_cr_opt;
+ } else { /* copy-return optimization is impossible, do the copy. */
+ copy = new_r_CopyB(
+ bl,
+ mem,
+ arg,
+ pred,
+ tp
+ );
+ mem = new_r_Proj(copy, mode_M, pn_CopyB_M);
+ }
+ }
+ if (lp->flags & LF_RETURN_HIDDEN) {
+ new_in[j] = arg;
+ ++j;
+ }
+ } else { /* scalar return value */
+ new_in[j] = pred;
+ ++j;
+ }
+ }
+ /* replace the in of the Return */
+ new_in[0] = mem;
+ set_irn_in(ret, j, new_in);
+
+ if (n_cr_opt > 0) {
+ size_t i, n;
+
+ irg_walk_graph(irg, NULL, do_copy_return_opt, cr_opt);
+
+ for (i = 0, n = ARR_LEN(cr_opt); i < n; ++i) {
+ free_entity(cr_opt[i].ent);
+ }
+ }
+ } /* if (n_ret_com) */
+
+ pmap_destroy(env.dummy_map);
+ obstack_free(&env.obst, NULL);
+
+ if (env.changed) {
+ /* invalidate the analysis info */
+ set_irg_outs_inconsistent(irg);
+ set_irg_loopinfo_state(irg, loopinfo_inconsistent);
+ }
+ current_ir_graph = rem;
}
/**
* @param lp lowering parameters
* @param tp The type.
*/
-static int must_be_lowered(const lower_params_t *lp, ir_type *tp) {
- int i, n_ress;
+static int must_be_lowered(const lower_params_t *lp, ir_type *tp)
+{
+ size_t i, n_ress;
ir_type *res_tp;
if (is_Method_type(tp)) {
* type-walker: lower all method types of entities
* and points-to types.
*/
-static void lower_method_types(type_or_ent *tore, void *env)
+static void lower_method_types(type_or_ent tore, void *env)
{
- const lower_params_t *lp = env;
- ir_type *tp;
-
- /* fix method entities */
- if (is_entity(tore)) {
- ir_entity *ent = (ir_entity *)tore;
- tp = get_entity_type(ent);
-
- if (must_be_lowered(lp, tp)) {
- tp = create_modified_mtd_type(lp, tp);
- set_entity_type(ent, tp);
- }
- }
- else {
- tp = (ir_type *)tore;
-
- /* fix pointer to methods */
- if (is_Pointer_type(tp)) {
- ir_type *etp = get_pointer_points_to_type(tp);
- if (must_be_lowered(lp, etp)) {
- etp = create_modified_mtd_type(lp, etp);
- set_pointer_points_to_type(tp, etp);
- }
- }
- }
+ const lower_params_t *lp = (const lower_params_t*)env;
+ ir_type *tp;
+
+ /* fix method entities */
+ if (is_entity(tore.ent)) {
+ ir_entity *ent = tore.ent;
+ tp = get_entity_type(ent);
+
+ if (must_be_lowered(lp, tp)) {
+ tp = create_modified_mtd_type(lp, tp);
+ set_entity_type(ent, tp);
+ }
+ } else {
+ tp = tore.typ;
+
+ /* fix pointer to methods */
+ if (is_Pointer_type(tp)) {
+ ir_type *etp = get_pointer_points_to_type(tp);
+ if (must_be_lowered(lp, etp)) {
+ etp = create_modified_mtd_type(lp, etp);
+ set_pointer_points_to_type(tp, etp);
+ }
+ }
+ }
}
/*
*/
void lower_calls_with_compounds(const lower_params_t *params)
{
- int i;
- ir_graph *irg;
- lower_params_t param = *params;
-
- if (param.find_pointer_type == NULL) {
- param.find_pointer_type = def_find_pointer_type;
- type_map = pmap_create_ex(8);
- }
- else
- type_map = NULL;
+ size_t i, n;
+ ir_graph *irg;
+ lower_params_t param = *params;
- /* first step: Transform all graphs */
- for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
- irg = get_irp_irg(i);
+ if (param.find_pointer_type == NULL) {
+ param.find_pointer_type = def_find_pointer_type;
+ type_map = pmap_create_ex(8);
+ } else
+ type_map = NULL;
- if (irg == get_const_code_irg())
- continue;
+ /* first step: Transform all graphs */
+ for (i = 0, n = get_irp_n_irgs(); i < n; ++i) {
+ irg = get_irp_irg(i);
- transform_irg(¶m, irg);
- }
+ transform_irg(¶m, irg);
+ }
- /* second step: Lower all method types of visible entities */
- type_walk(NULL, lower_method_types, ¶m);
+ /* second step: Lower all method types of visible entities */
+ type_walk(NULL, lower_method_types, ¶m);
- if (type_map)
- pmap_destroy(type_map);
+ if (type_map)
+ pmap_destroy(type_map);
}
+
projects / libfirm / blobdiff