X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Flower%2Flower_intrinsics.c;h=f64c03953c0d3deb5a98b2a170620084e2f299d0;hb=2e291eab8268af551488b1f4fb4d9ca61b625e33;hp=8f985e761c7686e73da444b89a6d95174188e5ec;hpb=1fe88d089f25a5b40b25c65730fa3506f90d6359;p=libfirm diff --git a/ir/lower/lower_intrinsics.c b/ir/lower/lower_intrinsics.c index 8f985e761..f64c03953 100644 --- a/ir/lower/lower_intrinsics.c +++ b/ir/lower/lower_intrinsics.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved. + * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved. * * This file is part of libFirm. * @@ -38,10 +38,12 @@ #include "irgmod.h" #include "irgopt.h" #include "trouts.h" +#include "irvrfy.h" #include "pmap.h" -#include "xmalloc.h" +#include "array_t.h" +#include "iropt_dbg.h" -/** Walker environment */ +/** Walker environment. */ typedef struct _walker_env { pmap *c_map; /**< The intrinsic call map. */ unsigned nr_of_intrinsics; /**< statistics */ @@ -62,11 +64,10 @@ static void call_mapper(ir_node *node, void *env) { ir_entity *ent; symconst = get_Call_ptr(node); - if (get_irn_op(symconst) != op_SymConst || - get_SymConst_kind(symconst) != symconst_addr_ent) + if (! is_Global(symconst)) return; - ent = get_SymConst_entity(symconst); + ent = get_Global_entity(symconst); p = pmap_find(wenv->c_map, ent); if (p) { @@ -86,7 +87,7 @@ static void call_mapper(ir_node *node, void *env) { } } } -} +} /* call_mapper */ /* Go through all graphs and map calls to intrinsic functions. */ unsigned lower_intrinsics(i_record *list, int length, int part_block_used) { @@ -126,21 +127,24 @@ unsigned lower_intrinsics(i_record *list, int length, int part_block_used) { wenv.nr_of_intrinsics = 0; irg_walk_graph(irg, NULL, call_mapper, &wenv); - if (wenv.nr_of_intrinsics) { - /* changes detected */ + if (wenv.nr_of_intrinsics > 0) { + /* Changes detected: we might have added/removed nodes. */ set_irg_outs_inconsistent(irg); set_irg_callee_info_state(irg, irg_callee_info_inconsistent); - /* exception control flow might have changed */ + /* Exception control flow might have changed / new block might have added. */ set_irg_doms_inconsistent(irg); set_irg_extblk_inconsistent(irg); set_irg_loopinfo_inconsistent(irg); - /* calls might be removed/added */ + /* Calls might be removed/added. */ set_trouts_inconsistent(); - /* optimize it, tuple might be created */ - local_optimize_graph(irg); + /* verify here */ + irg_verify(irg, VRFY_NORMAL); + + /* Optimize it, tuple might be created. */ + optimize_graph_df(irg); nr_of_intrinsics += wenv.nr_of_intrinsics; } @@ -148,33 +152,57 @@ unsigned lower_intrinsics(i_record *list, int length, int part_block_used) { pmap_destroy(c_map); return nr_of_intrinsics; -} +} /* lower_intrinsics */ -/* A mapper for the integer abs. */ -int i_mapper_Abs(ir_node *call, void *ctx) { - ir_node *mem = get_Call_mem(call); +/** + * 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_node *op = get_Call_param(call, 0); - ir_node *irn; - dbg_info *dbg = get_irn_dbg_info(call); - (void) ctx; - irn = new_rd_Abs(dbg, current_ir_graph, block, op, get_irn_mode(op)); - irn = new_Tuple(1, &irn); + if (reg_jmp == NULL) { + + /* Beware: do we need here a protection against CSE? Better we do it. */ + int old_cse = get_opt_cse(); + set_opt_cse(0); + reg_jmp = new_r_Jmp(current_ir_graph, block); + set_opt_cse(old_cse); + exc_jmp = new_Bad(); + } + irn = new_r_Tuple(current_ir_graph, block, 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_X_regular, reg_jmp); + set_Tuple_pred(call, pn_Call_X_except, exc_jmp); 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()); +} /* replace_call */ +/* A mapper for the integer abs. */ +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_node *irn; + dbg_info *dbg = get_irn_dbg_info(call); + (void) ctx; + + irn = new_rd_Abs(dbg, current_ir_graph, block, op, get_irn_mode(op)); + DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ABS); + replace_call(irn, call, mem, NULL, NULL); return 1; -} +} /* i_mapper_abs */ /* 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); @@ -182,28 +210,24 @@ int i_mapper_Alloca(ir_node *call, void *ctx) { 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); + if (mode_is_signed(get_irn_mode(op))) { + op = new_rd_Conv(dbg, current_ir_graph, block, op, mode_Iu); + } - 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()); + irn = new_rd_Alloc(dbg, current_ir_graph, block, mem, op, firm_unknown_type, stack_alloc); + mem = new_rd_Proj(dbg, current_ir_graph, block, irn, mode_M, pn_Alloc_M); + no_exc = new_rd_Proj(dbg, current_ir_graph, block, irn, mode_X, pn_Alloc_X_regular); + exc = new_rd_Proj(dbg, current_ir_graph, block, irn, mode_X, pn_Alloc_X_except); + irn = new_rd_Proj(dbg, current_ir_graph, block, irn, get_modeP_data(), pn_Alloc_res); + DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA); + replace_call(irn, call, mem, no_exc, exc); return 1; -} +} /* i_mapper_alloca */ /* A mapper for the floating point sqrt. */ -int i_mapper_Sqrt(ir_node *call, void *ctx) { - dbg_info *dbg; - ir_node *irn, *mem, *block; +int i_mapper_sqrt(ir_node *call, void *ctx) { + ir_node *mem; tarval *tv; ir_node *op = get_Call_param(call, 0); (void) ctx; @@ -215,33 +239,44 @@ int i_mapper_Sqrt(ir_node *call, void *ctx) { if (! tarval_is_null(tv) && !tarval_is_one(tv)) return 0; - mem = get_Call_mem(call); - block = get_nodes_block(call); - dbg = get_irn_dbg_info(call); + mem = get_Call_mem(call); /* sqrt(0) = 0, sqrt(1) = 1 */ - irn = op; - irn = new_Tuple(1, &irn); + DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT); + replace_call(op, call, mem, NULL, NULL); + return 1; +} /* i_mapper_sqrt */ - 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()); +/* A mapper for the floating point cbrt. */ +int i_mapper_cbrt(ir_node *call, void *ctx) { + ir_node *mem; + 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; -} +} /* i_mapper_cbrt */ /* A mapper for the floating point pow. */ -int i_mapper_Pow(ir_node *call, void *ctx) { +int i_mapper_pow(ir_node *call, void *ctx) { dbg_info *dbg; ir_node *mem; ir_node *left = get_Call_param(call, 0); ir_node *right = get_Call_param(call, 1); ir_node *block = get_nodes_block(call); - ir_node *irn, *reg_jmp, *exc_jmp; + ir_node *irn, *reg_jmp = NULL, *exc_jmp = NULL; (void) ctx; if (is_Const(left) && is_Const_one(left)) { @@ -261,6 +296,8 @@ int i_mapper_Pow(ir_node *call, void *ctx) { irn = NULL; } else return 0; + } else { + return 0; } mem = get_Call_mem(call); @@ -276,26 +313,527 @@ int i_mapper_Pow(ir_node *call, void *ctx) { irn = new_r_Proj(current_ir_graph, block, quot, mode, pn_Quot_res); reg_jmp = new_r_Proj(current_ir_graph, block, quot, mode_X, pn_Quot_X_regular); exc_jmp = new_r_Proj(current_ir_graph, block, quot, mode_X, pn_Quot_X_except); - } else { - /* Beware: do we need here a protection against CSE? Better we do it. */ - int old_cse = get_opt_cse(); - set_opt_cse(0); - reg_jmp = new_r_Jmp(current_ir_graph, block); - set_opt_cse(old_cse); - exc_jmp = new_Bad(); } - irn = new_Tuple(1, &irn); + DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW); + replace_call(irn, call, mem, reg_jmp, exc_jmp); + return 1; +} /* i_mapper_pow */ - turn_into_tuple(call, pn_Call_max); - set_Tuple_pred(call, pn_Call_M_regular, mem); - set_Tuple_pred(call, pn_Call_X_regular, reg_jmp); - set_Tuple_pred(call, pn_Call_X_except, exc_jmp); - 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()); +/* A mapper for the floating point exp. */ +int i_mapper_exp(ir_node *call, void *ctx) { + ir_node *val = get_Call_param(call, 0); + (void) ctx; - return 1; -} + if (is_Const(val) && is_Const_null(val)) { + /* exp(0.0) = 1.0 */ + ir_node *block = get_nodes_block(call); + ir_mode *mode = get_irn_mode(val); + ir_node *irn = new_r_Const(current_ir_graph, block, mode, 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; +} /* i_mapper_exp */ + +/** + * 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; +} /* i_mapper_zero_to_zero */ + +/** + * 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_node *block = get_nodes_block(call); + ir_mode *mode = get_irn_mode(val); + ir_node *irn = new_r_Const(current_ir_graph, block, mode, 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; +} /* i_mapper_one_to_zero */ + +/** + * 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) { + 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, current_ir_graph, 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); + } + } 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); + } + + if (is_Const(val) && is_Const_null(val)) { + /* f(0.0) = 1.0 */ + ir_node *block = get_nodes_block(call); + ir_mode *mode = get_irn_mode(val); + ir_node *irn = new_r_Const(current_ir_graph, block, mode, get_mode_one(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; +} /* i_mapper_symmetric_zero_to_one */ + +/* A mapper for the floating point log. */ +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); +} /* i_mapper_log */ + +/* A mapper for the floating point sin. */ +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); +} /* i_mapper_sin */ + +/* A mapper for the floating point cos. */ +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); +} /* i_mapper_cos */ + +/* A mapper for the floating point tan. */ +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); +} /* i_mapper_tan */ + +/* A mapper for the floating point asin. */ +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); +} /* i_mapper_asin */ + +/* A mapper for the floating point acos. */ +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); +} /* i_mapper_acos */ + +/* A mapper for the floating point atan. */ +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); +} /* i_mapper_atan */ + +/* A mapper for the floating point sinh. */ +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); +} /* i_mapper_sinh */ + +/* A mapper for the floating point cosh. */ +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); +} /* i_mapper_cosh */ + +/* A mapper for the floating point tanh. */ +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); +} /* i_mapper_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) { + /* FIXME: this cannot handle constant strings inside struct initializers yet */ + if (is_Global(ptr)) { + ir_entity *ent = get_Global_entity(ptr); + + if (get_entity_variability(ent) == variability_constant) { + /* a constant entity */ + return ent; + } + } + return NULL; +} /* get_const_entity */ + +/** + * 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_entity *ent, ir_type *res_tp) { + ir_type *tp = get_entity_type(ent); + ir_mode *mode; + int i, n, len = -1; + + 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) != get_mode_size_bits(mode_Bs)) + return NULL; + + 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 */ + len = i; + break; + } + } + if (len >= 0) { + tarval *tv = new_tarval_from_long(len, get_type_mode(res_tp)); + return new_Const_type(tv, res_tp); + } + return NULL; +} /* eval_strlen */ + +/* A mapper for strlen */ +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(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; +} /* i_mapper_strlen */ + +/** + * 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_entity *left, ir_entity *right, ir_type *res_tp) { + ir_type *tp; + ir_mode *mode; + int i, n, n_r, res; + + 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) != get_mode_size_bits(mode_Bs)) + 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) != get_mode_size_bits(mode_Bs)) + return NULL; + + n = get_compound_ent_n_values(left); + n_r = get_compound_ent_n_values(right); + if (n_r < n) + n = n_r; + for (i = 0; i < n; ++i) { + ir_node *irn; + long v_l, v_r; + 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 */ + tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp)); + return new_Const_type(tv, res_tp); + } + return NULL; +} /* eval_strcmp */ + +/** + * 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; + int n; + ir_node *irn; + + 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) != get_mode_size_bits(mode_Bs)) + return 0; + + 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); +} /* is_empty_string */ + +/* A mapper for strcmp */ +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_node *mem = get_Call_mem(call); + ir_mode *mode = get_type_mode(res_tp); + ir_node *block = get_nodes_block(call); + + irn = new_r_Const(current_ir_graph, block, mode, 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(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, current_ir_graph, block, mem, v, mode); + mem = new_r_Proj(current_ir_graph, block, irn, mode_M, pn_Load_M); + exc = new_r_Proj(current_ir_graph, block, irn, mode_X, pn_Load_X_except); + reg = new_r_Proj(current_ir_graph, block, irn, mode_X, pn_Load_X_regular); + irn = new_r_Proj(current_ir_graph, block, irn, mode, pn_Load_res); + + /* conv to the result mode */ + mode = get_type_mode(res_tp); + irn = new_rd_Conv(dbg, current_ir_graph, block, irn, mode); + + if (v == right) { + /* negate in the ("", s) case */ + irn = new_rd_Minus(dbg, current_ir_graph, 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; +} /* i_mapper_strcmp */ + +/* A mapper for strncmp */ +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_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); + ir_node *block = get_nodes_block(call); + + irn = new_r_Const(current_ir_graph, block, mode, get_mode_null(mode)); + DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP); + replace_call(irn, call, mem, NULL, NULL); + return 1; + } + return 0; +} /* i_mapper_strncmp */ + +/* A mapper for memcpy */ +int i_mapper_memcpy(ir_node *call, void *ctx) { + ir_node *len = get_Call_param(call, 2); + (void) ctx; + + if (is_Const(len) && is_Const_null(len)) { + /* a memcpy(d, s, 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_MEMCPY); + replace_call(dst, call, mem, NULL, NULL); + return 1; + } + return 0; +} /* i_mapper_memcpy */ + +/* A mapper for memset */ +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; +} /* i_mapper_memset */ /** * Returns the result mode of a node. @@ -309,7 +847,7 @@ static ir_mode *get_irn_res_mode(ir_node *node) { case iro_DivMod: return get_DivMod_resmode(node); default: return NULL; } -} +} /* get_irn_res_mode */ #define LMAX(a, b) ((a) > (b) ? (a) : (b)) @@ -392,7 +930,7 @@ int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt) { /* step 1: create the call */ sym.entity_p = rt->ent; - addr = new_r_SymConst(irg, bl, sym, symconst_addr_ent); + addr = new_r_SymConst(irg, bl, mode_P_code, sym, symconst_addr_ent); call = new_rd_Call(get_irn_dbg_info(node), irg, bl, mem, addr, n_param, in, mtp); set_irn_pinned(call, get_irn_pinned(node)); @@ -411,7 +949,7 @@ int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt) { 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) { + if (!is_NoMem(mem)) { /* 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)); @@ -440,4 +978,4 @@ int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt) { } /* should not happen */ return 0; -} +} /* i_mapper_RuntimeCall */