/*
- * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved.
+ * Copyright (C) 1995-2011 University of Karlsruhe. All right reserved.
*
* This file is part of libFirm.
*
* @file
* @brief lowering of Calls of intrinsic functions
* @author Michael Beck
- * @version $Id$
*/
-
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
+
+#include <stdbool.h>
#include "lowering.h"
#include "irop_t.h"
#include "irgmod.h"
#include "irgopt.h"
#include "trouts.h"
+#include "irverify.h"
#include "pmap.h"
-#include "xmalloc.h"
+#include "array_t.h"
+#include "irpass_t.h"
+#include "iropt_dbg.h"
+#include "error.h"
+#include "be.h"
+#include "util.h"
-/** Walker environment */
-typedef struct _walker_env {
+/** Walker environment. */
+typedef struct walker_env {
pmap *c_map; /**< The intrinsic call map. */
- unsigned nr_of_intrinsics; /**< statistics */
+ size_t nr_of_intrinsics; /**< statistics */
i_instr_record **i_map; /**< The intrinsic instruction map. */
} walker_env_t;
/**
* walker: call all mapper functions
*/
-static void call_mapper(ir_node *node, void *env) {
- walker_env_t *wenv = env;
+static void call_mapper(ir_node *node, void *env)
+{
+ walker_env_t *wenv = (walker_env_t*)env;
ir_op *op = get_irn_op(node);
if (op == op_Call) {
ir_entity *ent;
symconst = get_Call_ptr(node);
- if (get_irn_op(symconst) != op_SymConst ||
- get_SymConst_kind(symconst) != symconst_addr_ent)
+ if (! is_SymConst_addr_ent(symconst))
return;
ent = get_SymConst_entity(symconst);
p = pmap_find(wenv->c_map, ent);
if (p) {
- r = p->value;
+ r = (const i_call_record*)p->value;
wenv->nr_of_intrinsics += r->i_mapper(node, r->ctx) ? 1 : 0;
}
} else {
++wenv->nr_of_intrinsics;
break;
}
- r = r->link;
+ r = (const i_instr_record*)r->link;
}
}
}
}
-/* Go through all graphs and map calls to intrinsic functions. */
-unsigned lower_intrinsics(i_record *list, int length, int part_block_used) {
- int i, n_ops = get_irp_n_opcodes();
+size_t lower_intrinsics(i_record *list, size_t length, int part_block_used)
+{
+ size_t i, n;
+ size_t n_ops = get_irp_n_opcodes();
ir_graph *irg;
pmap *c_map = pmap_create_ex(length);
i_instr_record **i_map;
- unsigned nr_of_intrinsics = 0;
+ size_t nr_of_intrinsics = 0;
walker_env_t wenv;
/* we use the ir_op generic pointers here */
- NEW_ARR_A(const i_instr_record *, i_map, n_ops);
+ NEW_ARR_A(i_instr_record *, i_map, n_ops);
memset((void *)i_map, 0, sizeof(*i_map) * n_ops);
/* fill a map for faster search */
- for (i = length - 1; i >= 0; --i) {
+ for (i = 0; i < length; ++i) {
if (list[i].i_call.kind == INTRINSIC_CALL) {
pmap_insert(c_map, list[i].i_call.i_ent, (void *)&list[i].i_call);
} else {
wenv.c_map = c_map;
wenv.i_map = i_map;
- for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
+ for (i = 0, n = get_irp_n_irgs(); i < n; ++i) {
irg = get_irp_irg(i);
- if (part_block_used)
+ if (part_block_used) {
+ ir_reserve_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
collect_phiprojs(irg);
+ }
wenv.nr_of_intrinsics = 0;
irg_walk_graph(irg, NULL, call_mapper, &wenv);
- if (wenv.nr_of_intrinsics) {
- /* changes detected */
- set_irg_outs_inconsistent(irg);
- set_irg_callee_info_state(irg, irg_callee_info_inconsistent);
+ if (part_block_used)
+ ir_free_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
- /* exception control flow might have changed */
- set_irg_doms_inconsistent(irg);
- set_irg_extblk_inconsistent(irg);
- set_irg_loopinfo_inconsistent(irg);
+ if (wenv.nr_of_intrinsics > 0) {
+ /* Changes detected: we might have added/removed nodes. */
+ set_irg_callee_info_state(irg, irg_callee_info_inconsistent);
- /* calls might be removed/added */
- set_trouts_inconsistent();
+ /* Exception control flow might have changed / new block might have added. */
+ clear_irg_state(irg, IR_GRAPH_STATE_CONSISTENT_DOMINANCE
+ | IR_GRAPH_STATE_VALID_EXTENDED_BLOCKS);
- /* optimize it, tuple might be created */
- local_optimize_graph(irg);
+ /* verify here */
+ irg_verify(irg, VERIFY_NORMAL);
nr_of_intrinsics += wenv.nr_of_intrinsics;
}
return nr_of_intrinsics;
}
-/* A mapper for the integer abs. */
-int i_mapper_Abs(ir_node *call, void *ctx) {
+typedef struct pass_t {
+ ir_prog_pass_t pass;
+
+ int part_block_used;
+ size_t length;
+ i_record list[1];
+} pass_t;
+
+/**
+ * Wrapper for running lower_intrinsics() as an ir_prog pass.
+ */
+static int pass_wrapper(ir_prog *irp, void *context)
+{
+ pass_t *pass = (pass_t*)context;
+ (void) irp; /* TODO: set current irp, or remove parameter */
+ lower_intrinsics(pass->list, pass->length, pass->part_block_used);
+ /* probably this pass should not run again */
+ return 0;
+}
+
+/**
+ * Creates an ir_prog pass for lower_intrinsics.
+ *
+ * @param name the name of this pass or NULL
+ * @param list an array of intrinsic map records
+ * @param length the length of the array
+ * @param part_block_used set to true if part_block() must be using during lowering
+ */
+ir_prog_pass_t *lower_intrinsics_pass(
+ const char *name,
+ i_record *list, size_t length, int part_block_used)
+{
+ pass_t *const pass = XMALLOCF(pass_t, list, length);
+ memcpy(pass->list, list, sizeof(list[0]) * length);
+ pass->length = length;
+ pass->part_block_used = part_block_used;
+
+ return def_prog_pass_constructor(
+ &pass->pass, name ? name : "lower_intrinsics", pass_wrapper);
+}
+
+/**
+ * Helper function, replace the call by the given node.
+ *
+ * @param irn the result node
+ * @param call the call to replace
+ * @param mem the new mem result
+ * @param reg_jmp new regular control flow, if NULL, a Jmp will be used
+ * @param exc_jmp new exception control flow, if reg_jmp == NULL, a Bad will be used
+ */
+static void replace_call(ir_node *irn, ir_node *call, ir_node *mem,
+ ir_node *reg_jmp, ir_node *exc_jmp)
+{
+ ir_node *block = get_nodes_block(call);
+ ir_graph *irg = get_irn_irg(block);
+ ir_node *rest = new_r_Tuple(block, 1, &irn);
+
+ if (ir_throws_exception(call)) {
+ turn_into_tuple(call, pn_Call_max+1);
+ if (reg_jmp == NULL) {
+ reg_jmp = new_r_Jmp(block);
+ }
+ if (exc_jmp == NULL) {
+ exc_jmp = new_r_Bad(irg, mode_X);
+ }
+ set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
+ set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
+ } else {
+ assert(reg_jmp == NULL);
+ assert(exc_jmp == NULL);
+ turn_into_tuple(call, pn_Call_T_result+1);
+ assert(pn_Call_M <= pn_Call_T_result);
+ assert(pn_Call_X_regular > pn_Call_T_result);
+ assert(pn_Call_X_except > pn_Call_T_result);
+ }
+ set_Tuple_pred(call, pn_Call_M, mem);
+ set_Tuple_pred(call, pn_Call_T_result, rest);
+}
+
+int i_mapper_abs(ir_node *call, void *ctx)
+{
+ ir_node *mem = get_Call_mem(call);
+ ir_node *block = get_nodes_block(call);
+ ir_node *op = get_Call_param(call, 0);
+ ir_graph *irg = get_irn_irg(call);
+ ir_mode *mode = get_irn_mode(op);
+ dbg_info *dbg = get_irn_dbg_info(call);
+ ir_node *zero = new_r_Const(irg, get_mode_null(mode));
+ ir_node *cmp = new_rd_Cmp(dbg, block, op, zero, ir_relation_less);
+ ir_node *minus_op = new_rd_Minus(dbg, block, op, mode);
+ ir_node *mux;
+ arch_allow_ifconv_func allow_ifconv = be_get_backend_param()->allow_ifconv;
+ (void) ctx;
+
+ /* mux allowed by backend? */
+ if (!allow_ifconv(cmp, op, minus_op))
+ return 0;
+
+ /* construct Mux */
+ mux = new_rd_Mux(dbg, block, cmp, op, minus_op, mode);
+ DBG_OPT_ALGSIM0(call, mux, FS_OPT_RTS_ABS);
+ replace_call(mux, call, mem, NULL, NULL);
+ return 1;
+}
+
+int i_mapper_bswap(ir_node *call, void *ctx)
+{
ir_node *mem = get_Call_mem(call);
ir_node *block = get_nodes_block(call);
ir_node *op = get_Call_param(call, 0);
- ir_node *irn;
+ ir_type *tp = get_Call_type(call);
dbg_info *dbg = get_irn_dbg_info(call);
+ ir_node *irn;
(void) ctx;
- irn = new_rd_Abs(dbg, current_ir_graph, block, op, get_irn_mode(op));
- irn = new_Tuple(1, &irn);
-
- turn_into_tuple(call, pn_Call_max);
- set_Tuple_pred(call, pn_Call_M_regular, mem);
- set_Tuple_pred(call, pn_Call_X_regular, new_r_Jmp(current_ir_graph, block));
- set_Tuple_pred(call, pn_Call_X_except, new_Bad());
- set_Tuple_pred(call, pn_Call_T_result, irn);
- set_Tuple_pred(call, pn_Call_M_except, mem);
- set_Tuple_pred(call, pn_Call_P_value_res_base, new_Bad());
-
+ irn = new_rd_Builtin(dbg, block, get_irg_no_mem(current_ir_graph), 1, &op, ir_bk_bswap, tp);
+ set_irn_pinned(irn, op_pin_state_floats);
+ irn = new_r_Proj(irn, get_irn_mode(op), pn_Builtin_max+1);
+ replace_call(irn, call, mem, NULL, NULL);
return 1;
}
-/* A mapper for the alloca() function. */
-int i_mapper_Alloca(ir_node *call, void *ctx) {
+int i_mapper_alloca(ir_node *call, void *ctx)
+{
ir_node *mem = get_Call_mem(call);
ir_node *block = get_nodes_block(call);
ir_node *op = get_Call_param(call, 0);
dbg_info *dbg = get_irn_dbg_info(call);
(void) ctx;
- irn = new_rd_Alloc(dbg, current_ir_graph, block, mem, op, firm_unknown_type, stack_alloc);
- mem = new_Proj(irn, mode_M, pn_Alloc_M);
- no_exc = new_Proj(irn, mode_X, pn_Alloc_X_regular);
- exc = new_Proj(irn, mode_X, pn_Alloc_X_except);
- irn = new_Proj(irn, get_modeP_data(), pn_Alloc_res);
- irn = new_Tuple(1, &irn);
-
- turn_into_tuple(call, pn_Call_max);
- set_Tuple_pred(call, pn_Call_M_regular, mem);
- set_Tuple_pred(call, pn_Call_X_regular, no_exc);
- set_Tuple_pred(call, pn_Call_X_except, exc);
- set_Tuple_pred(call, pn_Call_T_result, irn);
- set_Tuple_pred(call, pn_Call_M_except, mem);
- set_Tuple_pred(call, pn_Call_P_value_res_base, new_Bad());
+ if (mode_is_signed(get_irn_mode(op))) {
+ ir_mode *mode = get_irn_mode(op);
+ mode = find_unsigned_mode(mode);
+ if (mode == NULL) {
+ panic("Cannot find unsigned mode for %M", mode);
+ }
+ op = new_rd_Conv(dbg, block, op, mode);
+ }
+
+ irn = new_rd_Alloc(dbg, block, mem, op, firm_unknown_type, stack_alloc);
+ mem = new_rd_Proj(dbg, irn, mode_M, pn_Alloc_M);
+ irn = new_rd_Proj(dbg, irn, get_modeP_data(), pn_Alloc_res);
+ if (ir_throws_exception(call)) {
+ no_exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_regular);
+ exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_except);
+ ir_set_throws_exception(irn, true);
+ } else {
+ no_exc = NULL;
+ exc = NULL;
+ }
+
+ DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
+ replace_call(irn, call, mem, no_exc, exc);
+ return 1;
+}
+
+int i_mapper_sqrt(ir_node *call, void *ctx)
+{
+ ir_node *mem;
+ ir_tarval *tv;
+ ir_node *op = get_Call_param(call, 0);
+ (void) ctx;
+
+ if (!is_Const(op))
+ return 0;
+
+ tv = get_Const_tarval(op);
+ if (! tarval_is_null(tv) && !tarval_is_one(tv))
+ return 0;
+
+ mem = get_Call_mem(call);
+
+ /* sqrt(0) = 0, sqrt(1) = 1 */
+ DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
+ replace_call(op, call, mem, NULL, NULL);
+ return 1;
+}
+
+int i_mapper_cbrt(ir_node *call, void *ctx)
+{
+ ir_node *mem;
+ ir_tarval *tv;
+ ir_node *op = get_Call_param(call, 0);
+ (void) ctx;
+
+ if (!is_Const(op))
+ return 0;
+
+ tv = get_Const_tarval(op);
+ if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
+ return 0;
+
+ mem = get_Call_mem(call);
+ /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
+ DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
+ replace_call(op, call, mem, NULL, NULL);
return 1;
}
+int i_mapper_pow(ir_node *call, void *ctx)
+{
+ ir_node *left = get_Call_param(call, 0);
+ ir_node *right = get_Call_param(call, 1);
+ ir_node *block = get_nodes_block(call);
+ ir_graph *irg = get_irn_irg(block);
+ ir_node *reg_jmp = NULL;
+ ir_node *exc_jmp = NULL;
+ ir_node *irn;
+ dbg_info *dbg;
+ ir_node *mem;
+ (void) ctx;
+
+ if (is_Const(left) && is_Const_one(left)) {
+ /* pow (1.0, x) = 1.0 */
+ irn = left;
+ } else if (is_Const(right)) {
+ ir_tarval *tv = get_Const_tarval(right);
+ if (tarval_is_null(tv)) {
+ /* pow(x, 0.0) = 1.0 */
+ ir_mode *mode = get_tarval_mode(tv);
+ irn = new_r_Const(irg, get_mode_one(mode));
+ } else if (tarval_is_one(tv)) {
+ /* pow(x, 1.0) = x */
+ irn = left;
+ } else if (tarval_is_minus_one(tv)) {
+ /* pow(x, -1.0) = 1/x */
+ irn = NULL;
+ } else
+ return 0;
+ } else {
+ return 0;
+ }
+
+ mem = get_Call_mem(call);
+ dbg = get_irn_dbg_info(call);
+
+ if (irn == NULL) {
+ ir_mode *mode = get_irn_mode(left);
+ ir_node *div;
+
+ irn = new_r_Const(irg, get_mode_one(mode));
+ div = new_rd_Div(dbg, block, mem, irn, left, mode, op_pin_state_pinned);
+ mem = new_r_Proj(div, mode_M, pn_Div_M);
+ irn = new_r_Proj(div, mode, pn_Div_res);
+ if (ir_throws_exception(call)) {
+ reg_jmp = new_r_Proj(div, mode_X, pn_Div_X_regular);
+ exc_jmp = new_r_Proj(div, mode_X, pn_Div_X_except);
+ ir_set_throws_exception(div, true);
+ }
+ }
+ DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
+ replace_call(irn, call, mem, reg_jmp, exc_jmp);
+ return 1;
+}
+
+int i_mapper_exp(ir_node *call, void *ctx)
+{
+ ir_node *val = get_Call_param(call, 0);
+ (void) ctx;
+
+ if (is_Const(val) && is_Const_null(val)) {
+ /* exp(0.0) = 1.0 */
+ ir_graph *irg = get_irn_irg(val);
+ ir_mode *mode = get_irn_mode(val);
+ ir_node *irn = new_r_Const(irg, get_mode_one(mode));
+ ir_node *mem = get_Call_mem(call);
+ DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
+ replace_call(irn, call, mem, NULL, NULL);
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * A mapper for mapping f(0.0) to 0.0.
+ */
+static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason)
+{
+ ir_node *val = get_Call_param(call, 0);
+ (void) ctx;
+
+ if (is_Const(val) && is_Const_null(val)) {
+ /* f(0.0) = 0.0 */
+ ir_node *mem = get_Call_mem(call);
+ DBG_OPT_ALGSIM0(call, val, reason);
+ replace_call(val, call, mem, NULL, NULL);
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * A mapper for mapping f(1.0) to 0.0.
+ */
+static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason)
+{
+ ir_node *val = get_Call_param(call, 0);
+ (void) ctx;
+
+ if (is_Const(val) && is_Const_one(val)) {
+ /* acos(1.0) = 0.0 */
+ ir_graph *irg = get_irn_irg(val);
+ ir_mode *mode = get_irn_mode(val);
+ ir_node *irn = new_r_Const(irg, get_mode_null(mode));
+ ir_node *mem = get_Call_mem(call);
+ DBG_OPT_ALGSIM0(call, irn, reason);
+ replace_call(irn, call, mem, NULL, NULL);
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * A mapper for mapping a functions with the following characteristics:
+ * f(-x) = f(x).
+ * f(0.0) = 1.0
+ */
+static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason)
+{
+ int changed = 0;
+ ir_node *val = get_Call_param(call, 0);
+ (void) ctx;
+
+ if (is_strictConv(val)) {
+ ir_node *op = get_Conv_op(val);
+ if (is_Minus(op)) {
+ /* f(-x) = f(x) with strictConv */
+ ir_node *block = get_nodes_block(call);
+ ir_mode *mode = get_irn_mode(val);
+ dbg_info *dbg = get_irn_dbg_info(val);
+
+ op = get_Minus_op(op);
+ val = new_rd_Conv(dbg, block, op, mode);
+ if (is_Conv(val)) {
+ /* still a Conv ? */
+ set_Conv_strict(val, 1);
+ }
+ DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
+ set_Call_param(call, 0, val);
+ changed = 1;
+ }
+ } else if (is_Minus(val)) {
+ /* f(-x) = f(x) */
+ val = get_Minus_op(val);
+ DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
+ set_Call_param(call, 0, val);
+ changed = 1;
+ }
+
+ if (is_Const(val) && is_Const_null(val)) {
+ /* f(0.0) = 1.0 */
+ ir_graph *irg = get_irn_irg(val);
+ ir_mode *mode = get_irn_mode(val);
+ ir_node *irn = new_r_Const(irg, get_mode_one(mode));
+ ir_node *mem = get_Call_mem(call);
+ DBG_OPT_ALGSIM0(call, irn, reason);
+ replace_call(irn, call, mem, NULL, NULL);
+ changed = 1;
+ }
+ return changed;
+}
+
+int i_mapper_log(ir_node *call, void *ctx)
+{
+ /* log(1.0) = 0.0 */
+ return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
+}
+
+int i_mapper_sin(ir_node *call, void *ctx)
+{
+ /* sin(0.0) = 0.0 */
+ return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
+}
+
+int i_mapper_cos(ir_node *call, void *ctx)
+{
+ /* cos(0.0) = 1.0, cos(-x) = x */
+ return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
+}
+
+int i_mapper_tan(ir_node *call, void *ctx)
+{
+ /* tan(0.0) = 0.0 */
+ return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
+}
+
+int i_mapper_asin(ir_node *call, void *ctx)
+{
+ /* asin(0.0) = 0.0 */
+ return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
+}
+
+int i_mapper_acos(ir_node *call, void *ctx)
+{
+ /* acos(1.0) = 0.0 */
+ return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
+}
+
+int i_mapper_atan(ir_node *call, void *ctx)
+{
+ /* atan(0.0) = 0.0 */
+ return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
+}
+
+int i_mapper_sinh(ir_node *call, void *ctx)
+{
+ /* sinh(0.0) = 0.0 */
+ return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
+}
+
+int i_mapper_cosh(ir_node *call, void *ctx)
+{
+ /* cosh(0.0) = 1.0, cosh(-x) = x */
+ return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
+}
+
+int i_mapper_tanh(ir_node *call, void *ctx)
+{
+ /* tanh(0.0) = 0.0 */
+ return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
+}
+
+/**
+ * Return the const entity that is accessed through the pointer ptr or
+ * NULL if there is no entity (or the entity is not constant).
+ *
+ * @param ptr the pointer
+ */
+static ir_entity *get_const_entity(ir_node *ptr)
+{
+ if (is_SymConst_addr_ent(ptr)) {
+ ir_entity *ent = get_SymConst_entity(ptr);
+
+ if (get_entity_linkage(ent) & IR_LINKAGE_CONSTANT) {
+ /* a constant entity */
+ return ent;
+ }
+ }
+ return NULL;
+}
+
+static bool initializer_val_is_null(ir_initializer_t *init)
+{
+ ir_tarval *tv;
+
+ if (get_initializer_kind(init) == IR_INITIALIZER_NULL)
+ return true;
+
+ if (get_initializer_kind(init) == IR_INITIALIZER_TARVAL) {
+ tv = get_initializer_tarval_value(init);
+ } else if (get_initializer_kind(init) == IR_INITIALIZER_CONST) {
+ ir_node *irn = get_initializer_const_value(init);
+ if (!is_Const(irn))
+ return false;
+ tv = get_Const_tarval(irn);
+ } else {
+ return false;
+ }
+
+ return tarval_is_null(tv);
+}
+
+/**
+ * Calculate the value of strlen if possible.
+ *
+ * @param ent the entity
+ * @param res_tp the result type
+ *
+ * @return a Const node containing the strlen() result or NULL
+ * if the evaluation fails
+ */
+static ir_node *eval_strlen(ir_graph *irg, ir_entity *ent, ir_type *res_tp)
+{
+ ir_type *tp = get_entity_type(ent);
+ ir_mode *mode;
+ ir_initializer_t *initializer;
+ size_t size;
+ size_t i;
+
+ if (! is_Array_type(tp))
+ return NULL;
+ tp = get_array_element_type(tp);
+ if (! is_Primitive_type(tp))
+ return NULL;
+ mode = get_type_mode(tp);
+
+ /* FIXME: This is too restrict, as the type char might be more the 8bits */
+ if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
+ return NULL;
+
+ if (!has_entity_initializer(ent)) {
+ size_t i, n;
+
+ n = get_compound_ent_n_values(ent);
+ for (i = 0; i < n; ++i) {
+ ir_node *irn = get_compound_ent_value(ent, i);
+
+ if (! is_Const(irn))
+ return NULL;
+
+ if (is_Const_null(irn)) {
+ /* found the length */
+ ir_tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
+ return new_r_Const(irg, tv);
+ }
+ }
+ return NULL;
+ }
+
+ initializer = get_entity_initializer(ent);
+ if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
+ return NULL;
+
+ size = get_initializer_compound_n_entries(initializer);
+ for (i = 0; i < size; ++i) {
+ ir_initializer_t *val = get_initializer_compound_value(initializer, i);
+ if (initializer_val_is_null(val)) {
+ ir_tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
+ return new_r_Const(irg, tv);
+ }
+ }
+
+ return NULL;
+}
+
+int i_mapper_strlen(ir_node *call, void *ctx)
+{
+ ir_node *s = get_Call_param(call, 0);
+ ir_entity *ent = get_const_entity(s);
+
+ (void) ctx;
+
+ /* FIXME: this cannot handle constant strings inside struct initializers yet */
+ if (ent != NULL) {
+ /* a constant entity */
+ ir_type *tp = get_Call_type(call);
+ ir_node *irn;
+
+ tp = get_method_res_type(tp, 0);
+ irn = eval_strlen(get_irn_irg(call), ent, tp);
+
+ if (irn) {
+ ir_node *mem = get_Call_mem(call);
+ DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
+ replace_call(irn, call, mem, NULL, NULL);
+ return 1;
+ }
+ }
+ return 0;
+}
+
+/**
+ * Calculate the value of strlen if possible.
+ *
+ * @param left the left entity
+ * @param right the right entity
+ * @param res_tp the result type
+ *
+ * @return a Const node containing the strcmp() result or NULL
+ * if the evaluation fails
+ */
+static ir_node *eval_strcmp(ir_graph *irg, ir_entity *left, ir_entity *right,
+ ir_type *res_tp)
+{
+ ir_type *tp;
+ ir_mode *mode;
+
+ tp = get_entity_type(left);
+ if (! is_Array_type(tp))
+ return NULL;
+ tp = get_array_element_type(tp);
+ if (! is_Primitive_type(tp))
+ return NULL;
+ mode = get_type_mode(tp);
+
+ /* FIXME: This is too restrict, as the type char might be more the 8bits */
+ if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
+ return NULL;
+
+ tp = get_entity_type(right);
+ if (! is_Array_type(tp))
+ return NULL;
+ tp = get_array_element_type(tp);
+ if (! is_Primitive_type(tp))
+ return NULL;
+ mode = get_type_mode(tp);
+
+ /* FIXME: This is too restrict, as the type char might be more the 8bits */
+ if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
+ return NULL;
+
+ if (!has_entity_initializer(left) && !has_entity_initializer(right)) {
+ /* code that uses deprecated compound_graph_path stuff */
+ size_t n = get_compound_ent_n_values(left);
+ size_t n_r = get_compound_ent_n_values(right);
+ size_t i;
+ int res = 0;
+
+ if (n_r < n)
+ n = n_r;
+ for (i = 0; i < n; ++i) {
+ ir_node *irn;
+ long v_l, v_r;
+ ir_tarval *tv;
+
+ irn = get_compound_ent_value(left, i);
+ if (! is_Const(irn))
+ return NULL;
+ tv = get_Const_tarval(irn);
+ v_l = get_tarval_long(tv);
+
+ irn = get_compound_ent_value(right, i);
+ if (! is_Const(irn))
+ return NULL;
+ tv = get_Const_tarval(irn);
+ v_r = get_tarval_long(tv);
+
+ if (v_l < v_r) {
+ res = -1;
+ break;
+ }
+ if (v_l > v_r) {
+ res = +1;
+ break;
+ }
+
+ if (v_l == 0) {
+ res = 0;
+ break;
+ }
+ }
+ if (i < n) {
+ /* we found an end */
+ ir_tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
+ return new_r_Const(irg, tv);
+ }
+ return NULL;
+ }
+
+ /* TODO */
+
+ return NULL;
+}
+
+/**
+ * Checks if an entity represents the empty string.
+ *
+ * @param ent the entity
+ *
+ * @return non-zero if ent represents the empty string
+ */
+static int is_empty_string(ir_entity *ent)
+{
+ ir_type *tp = get_entity_type(ent);
+ ir_mode *mode;
+ ir_node *irn;
+ ir_initializer_t *initializer;
+ ir_initializer_t *init0;
+
+ if (! is_Array_type(tp))
+ return 0;
+ tp = get_array_element_type(tp);
+ if (! is_Primitive_type(tp))
+ return 0;
+ mode = get_type_mode(tp);
+
+ /* FIXME: This is too restrict, as the type char might be more the 8bits */
+ if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
+ return 0;
+
+ if (!has_entity_initializer(ent)) {
+ /* code for deprecated compound_graph_path stuff */
+ size_t n = get_compound_ent_n_values(ent);
+ if (n < 1)
+ return 0;
+ irn = get_compound_ent_value(ent, 0);
+
+ return is_Const(irn) && is_Const_null(irn);
+ }
+
+ initializer = get_entity_initializer(ent);
+ if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
+ return 0;
+
+ if (get_initializer_compound_n_entries(initializer) < 1)
+ return 0;
+
+ init0 = get_initializer_compound_value(initializer, 0);
+ return initializer_val_is_null(init0);
+}
+
+int i_mapper_strcmp(ir_node *call, void *ctx)
+{
+ ir_node *left = get_Call_param(call, 0);
+ ir_node *right = get_Call_param(call, 1);
+ ir_node *irn = NULL;
+ ir_node *exc = NULL;
+ ir_node *reg = NULL;
+ ir_type *call_tp = get_Call_type(call);
+ ir_type *res_tp = get_method_res_type(call_tp, 0);
+ ir_entity *ent_l, *ent_r;
+ ir_type *char_tp;
+ ir_node *v;
+
+ (void) ctx;
+
+ /* do some type checks first */
+ if (! is_Primitive_type(res_tp))
+ return 0;
+ char_tp = get_method_param_type(call_tp, 0);
+ if (char_tp != get_method_param_type(call_tp, 1))
+ return 0;
+ if (! is_Pointer_type(char_tp))
+ return 0;
+ char_tp = get_pointer_points_to_type(char_tp);
+
+ if (left == right) {
+ /* a strcmp(s, s) ==> 0 */
+ ir_graph *irg = get_irn_irg(call);
+ ir_node *mem = get_Call_mem(call);
+ ir_mode *mode = get_type_mode(res_tp);
+
+ irn = new_r_Const(irg, get_mode_null(mode));
+ DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
+ replace_call(irn, call, mem, NULL, NULL);
+ return 1;
+ }
+ ent_l = get_const_entity(left);
+ ent_r = get_const_entity(right);
+
+ if (ent_l != NULL && ent_r != NULL) {
+ /* both entities are const, try to evaluate */
+ irn = eval_strcmp(get_irn_irg(call), ent_l, ent_r, res_tp);
+ } else if (ent_l != NULL) {
+ if (is_empty_string(ent_l)) {
+ /* s strcmp("", s) ==> -(*s)*/
+ v = right;
+ goto replace_by_call;
+ }
+ } else if (ent_r != NULL) {
+ if (is_empty_string(ent_r)) {
+ /* s strcmp(s, "") ==> (*s) */
+ ir_node *mem, *block;
+ dbg_info *dbg;
+ ir_mode *mode;
+
+ v = left;
+replace_by_call:
+ mem = get_Call_mem(call);
+ block = get_nodes_block(call);
+ dbg = get_irn_dbg_info(call);
+ mode = get_type_mode(char_tp);
+
+ /* replace the strcmp by (*x) */
+ irn = new_rd_Load(dbg, block, mem, v, mode, cons_none);
+ mem = new_r_Proj(irn, mode_M, pn_Load_M);
+ irn = new_r_Proj(irn, mode, pn_Load_res);
+ if (ir_throws_exception(call)) {
+ exc = new_r_Proj(irn, mode_X, pn_Load_X_except);
+ reg = new_r_Proj(irn, mode_X, pn_Load_X_regular);
+ ir_set_throws_exception(irn, true);
+ } else {
+ exc = NULL;
+ reg = NULL;
+ }
+
+ /* conv to the result mode */
+ mode = get_type_mode(res_tp);
+ irn = new_rd_Conv(dbg, block, irn, mode);
+
+ if (v == right) {
+ /* negate in the ("", s) case */
+ irn = new_rd_Minus(dbg, block, irn, mode);
+ }
+ }
+ }
+
+ if (irn != NULL) {
+ ir_node *mem = get_Call_mem(call);
+ DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
+ replace_call(irn, call, mem, reg, exc);
+ return 1;
+ }
+
+ return 0;
+}
+
+int i_mapper_strncmp(ir_node *call, void *ctx)
+{
+ ir_node *left = get_Call_param(call, 0);
+ ir_node *right = get_Call_param(call, 1);
+ ir_node *len = get_Call_param(call, 2);
+ ir_node *irn;
+ (void) ctx;
+
+ if (left == right || (is_Const(len) && is_Const_null(len))) {
+ /* a strncmp(s, s, len) ==> 0 OR
+ a strncmp(a, b, 0) ==> 0 */
+ ir_graph *irg = get_irn_irg(call);
+ ir_node *mem = get_Call_mem(call);
+ ir_node *adr = get_Call_ptr(call);
+ ir_entity *ent = get_SymConst_entity(adr);
+ ir_type *call_tp = get_entity_type(ent);
+ ir_type *res_tp = get_method_res_type(call_tp, 0);
+ ir_mode *mode = get_type_mode(res_tp);
+
+ irn = new_r_Const(irg, get_mode_null(mode));
+ DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
+ replace_call(irn, call, mem, NULL, NULL);
+ return 1;
+ }
+ return 0;
+}
+
+int i_mapper_strcpy(ir_node *call, void *ctx)
+{
+ ir_node *dst = get_Call_param(call, 0);
+ ir_node *src = get_Call_param(call, 1);
+ (void) ctx;
+
+ if (dst == src) {
+ /* a strcpy(d, s) ==> d */
+ ir_node *mem = get_Call_mem(call);
+ ir_node *dst = get_Call_param(call, 0);
+
+ DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_STRCPY);
+ replace_call(dst, call, mem, NULL, NULL);
+ return 1;
+ }
+ return 0;
+}
+
+int i_mapper_memcpy(ir_node *call, void *ctx)
+{
+ ir_node *dst = get_Call_param(call, 0);
+ ir_node *src = get_Call_param(call, 1);
+ ir_node *len = get_Call_param(call, 2);
+ (void) ctx;
+
+ if (dst == src || (is_Const(len) && is_Const_null(len))) {
+ /* a memcpy(d, d, len) ==> d OR
+ a memcpy(d, s, 0) ==> d */
+ ir_node *mem = get_Call_mem(call);
+
+ DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
+ replace_call(dst, call, mem, NULL, NULL);
+ return 1;
+ }
+ return 0;
+}
+
+int i_mapper_mempcpy(ir_node *call, void *ctx)
+{
+ ir_node *dst = get_Call_param(call, 0);
+ ir_node *src = get_Call_param(call, 1);
+ ir_node *len = get_Call_param(call, 2);
+ (void) ctx;
+
+ if (dst == src || (is_Const(len) && is_Const_null(len))) {
+ /* a memcpy(d, d, len) ==> d + len OR
+ a memcpy(d, s, 0) ==> d + 0 */
+ dbg_info *dbg = get_irn_dbg_info(call);
+ ir_node *mem = get_Call_mem(call);
+ ir_node *blk = get_nodes_block(call);
+ ir_mode *mode = get_irn_mode(dst);
+ ir_node *res = new_rd_Add(dbg, blk, dst, len, mode);
+
+ DBG_OPT_ALGSIM0(call, res, FS_OPT_RTS_MEMPCPY);
+ replace_call(res, call, mem, NULL, NULL);
+ return 1;
+ }
+ return 0;
+}
+
+int i_mapper_memmove(ir_node *call, void *ctx)
+{
+ ir_node *dst = get_Call_param(call, 0);
+ ir_node *src = get_Call_param(call, 1);
+ ir_node *len = get_Call_param(call, 2);
+ (void) ctx;
+
+ if (dst == src || (is_Const(len) && is_Const_null(len))) {
+ /* a memmove(d, d, len) ==> d OR
+ a memmove(d, s, 0) ==> d */
+ ir_node *mem = get_Call_mem(call);
+
+ DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMMOVE);
+ replace_call(dst, call, mem, NULL, NULL);
+ return 1;
+ }
+ return 0;
+}
+
+int i_mapper_memset(ir_node *call, void *ctx)
+{
+ ir_node *len = get_Call_param(call, 2);
+ (void) ctx;
+
+ if (is_Const(len) && is_Const_null(len)) {
+ /* a memset(d, C, 0) ==> d */
+ ir_node *mem = get_Call_mem(call);
+ ir_node *dst = get_Call_param(call, 0);
+
+ DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
+ replace_call(dst, call, mem, NULL, NULL);
+ return 1;
+ }
+ return 0;
+}
+
+int i_mapper_memcmp(ir_node *call, void *ctx)
+{
+ ir_node *left = get_Call_param(call, 0);
+ ir_node *right = get_Call_param(call, 1);
+ ir_node *len = get_Call_param(call, 2);
+ ir_node *irn;
+ (void) ctx;
+
+ if (left == right || (is_Const(len) && is_Const_null(len))) {
+ /* a memcmp(s, s, len) ==> 0 OR
+ a memcmp(a, b, 0) ==> 0 */
+ ir_graph *irg = get_irn_irg(call);
+ ir_node *mem = get_Call_mem(call);
+ ir_node *adr = get_Call_ptr(call);
+ ir_entity *ent = get_SymConst_entity(adr);
+ ir_type *call_tp = get_entity_type(ent);
+ ir_type *res_tp = get_method_res_type(call_tp, 0);
+ ir_mode *mode = get_type_mode(res_tp);
+
+ irn = new_r_Const(irg, get_mode_null(mode));
+ DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
+ replace_call(irn, call, mem, NULL, NULL);
+ return 1;
+ }
+ return 0;
+}
+
/**
* Returns the result mode of a node.
*/
-static ir_mode *get_irn_res_mode(ir_node *node) {
+static ir_mode *get_irn_res_mode(ir_node *node)
+{
switch (get_irn_opcode(node)) {
case iro_Load: return get_Load_mode(node);
- case iro_Quot: return get_Quot_resmode(node);
case iro_Div: return get_Div_resmode(node);
case iro_Mod: return get_Mod_resmode(node);
- case iro_DivMod: return get_DivMod_resmode(node);
default: return NULL;
}
}
-#define LMAX(a, b) ((a) > (b) ? (a) : (b))
-
-/* A mapper for mapping unsupported instructions to runtime calls. */
-int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt) {
+int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt)
+{
int i, j, arity, first, n_param, n_res;
long n_proj;
ir_type *mtp;
ir_node *mem, *bl, *call, *addr, *res_proj;
ir_node **in;
+ bool throws_exception;
+ ir_op *op;
ir_graph *irg;
symconst_symbol sym;
ir_mode *mode = get_irn_mode(node);
return 0;
}
- n_res = get_method_n_ress(mtp);
+ n_res = get_method_n_ress(mtp);
+ throws_exception = ir_throws_exception(node);
/* step 0: calculate the number of needed Proj's */
n_proj = 0;
- n_proj = LMAX(n_proj, rt->mem_proj_nr + 1);
- n_proj = LMAX(n_proj, rt->regular_proj_nr + 1);
- n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
- n_proj = LMAX(n_proj, rt->exc_mem_proj_nr + 1);
- n_proj = LMAX(n_proj, rt->res_proj_nr + 1);
+ n_proj = MAX(n_proj, rt->mem_proj_nr + 1);
+ n_proj = MAX(n_proj, rt->res_proj_nr + 1);
+ if (throws_exception) {
+ n_proj = MAX(n_proj, rt->regular_proj_nr + 1);
+ n_proj = MAX(n_proj, rt->exc_proj_nr + 1);
+ }
if (n_proj > 0) {
if (rt->mode != mode_T) /* must be mode_T */
/* ok, when we are here, the number of predecessors match as well as the parameter modes */
bl = get_nodes_block(node);
+ op = get_irn_op(node);
in = NULL;
if (n_param > 0) {
/* step 1: create the call */
sym.entity_p = rt->ent;
- addr = new_r_SymConst(irg, bl, sym, symconst_addr_ent);
- call = new_rd_Call(get_irn_dbg_info(node), irg, bl, mem, addr, n_param, in, mtp);
+ addr = new_r_SymConst(irg, mode_P_code, sym, symconst_addr_ent);
+ call = new_rd_Call(get_irn_dbg_info(node), bl, mem, addr, n_param, in, mtp);
set_irn_pinned(call, get_irn_pinned(node));
if (n_res > 0)
- res_proj = new_r_Proj(irg, bl, call, mode_T, pn_Call_T_result);
+ res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
else
res_proj = NULL;
/* we are ready */
turn_into_tuple(node, n_proj);
- for (i = 0; i < n_proj; ++i)
- set_Tuple_pred(node, i, new_r_Bad(irg));
if (rt->mem_proj_nr >= 0)
- set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(irg, bl, call, mode_M, pn_Call_M_regular));
- if (get_irn_op(mem) != op_NoMem) {
- /* Exceptions can only be handled with real memory */
- if (rt->regular_proj_nr >= 0)
- set_Tuple_pred(node, rt->regular_proj_nr, new_r_Proj(irg, bl, call, mode_X, pn_Call_X_regular));
- if (rt->exc_proj_nr >= 0)
- set_Tuple_pred(node, rt->exc_proj_nr, new_r_Proj(irg, bl, call, mode_X, pn_Call_X_except));
- if (rt->exc_mem_proj_nr >= 0)
- set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(irg, bl, call, mode_M, pn_Call_M_except));
+ set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(call, mode_M, pn_Call_M));
+ if (throws_exception) {
+ set_Tuple_pred(node, op->pn_x_regular, new_r_Proj(call, mode_X, pn_Call_X_regular));
+ set_Tuple_pred(node, op->pn_x_except, new_r_Proj(call, mode_X, pn_Call_X_except));
}
- if (rt->res_proj_nr >= 0)
- for (i = 0; i < n_res; ++i)
- set_Tuple_pred(node, rt->res_proj_nr + i,
- new_r_Proj(irg, bl, res_proj, get_type_mode(get_method_res_type(mtp, i)), i));
- return 1;
+ if (rt->res_proj_nr >= 0) {
+ for (i = 0; i < n_res; ++i) {
+ ir_mode *mode = get_type_mode(get_method_res_type(mtp, i));
+ ir_node *proj = new_r_Proj(res_proj, mode, i);
+ set_Tuple_pred(node, rt->res_proj_nr + i, proj);
+ }
+ }
+ return 1;
} else {
/* only one return value supported */
if (n_res > 0) {
ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
- res_proj = new_r_Proj(irg, bl, call, mode_T, pn_Call_T_result);
- res_proj = new_r_Proj(irg, bl, res_proj, mode, 0);
+ res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
+ res_proj = new_r_Proj(res_proj, mode, 0);
exchange(node, res_proj);
return 1;
projects / libfirm / blobdiff