X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=include%2Flibfirm%2Flowering.h;h=12ff0565f203486df6c14ef938ee55595a2fa0e5;hb=6bc15eba58c5d8c33b010fdb85cbf384b758283e;hp=cdc6e8d15b1ad6ca38d68c044b9fef5797e17627;hpb=6e5fd745c70d70f56fbe65df64983675897eb304;p=libfirm diff --git a/include/libfirm/lowering.h b/include/libfirm/lowering.h index cdc6e8d15..12ff0565f 100644 --- a/include/libfirm/lowering.h +++ b/include/libfirm/lowering.h @@ -1,5 +1,5 @@ /* - * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved. + * Copyright (C) 1995-2011 University of Karlsruhe. All right reserved. * * This file is part of libFirm. * @@ -21,189 +21,61 @@ * @file * @brief Lowering of high level constructs. * @author Michael Beck - * @version $Id$ */ #ifndef FIRM_LOWERING_H #define FIRM_LOWERING_H +#include + #include "firm_types.h" #include "begin.h" /** - * A type telling where to add hidden parameters. - */ -typedef enum add_hidden_params { - ADD_HIDDEN_ALWAYS_IN_FRONT = 0, /**< always add hidden parameters in front (default). */ - ADD_HIDDEN_ALWAYS_LAST = 1, /**< always add hidden parameters last, did not work for variadic functions. */ - ADD_HIDDEN_SMART = 2 /**< add hidden parameters last for non-variadic and first for variadic functions. */ -} add_hidden; - -/** - * Additional flags for the lowering. - */ -enum lowering_flags { - LF_NONE = 0, /**< no additional flags */ - LF_COMPOUND_PARAM = 1, /**< lower calls with compound parameters */ - LF_COMPOUND_RETURN = 2, /**< lower calls with compound returns */ - LF_RETURN_HIDDEN = 4, /**< return the hidden address instead of void */ - LF_SMALL_CMP_IN_REGS = 8 /**< return small compound values in registers */ -}; - -/** Maximum number of registers that can be used to return compound values. */ -#define MAX_REGISTER_RET_VAL 2 - -/** - * A struct containing all control parameters for - * lower_compound_ret_calls(). - */ -typedef struct { - int def_ptr_alignment; /**< Default alignment for data pointer. */ - unsigned flags; /**< A bitmask of enum lowering_flags. */ - add_hidden hidden_params; /**< Where to add hidden parameters. */ - - /** - * A function returning a pointer type for a given type. - * If this pointer is NULL, a new pointer type is always created. - */ - ir_type *(*find_pointer_type)(ir_type *e_type, ir_mode *mode, int alignment); - - /** - * If the LF_SMALL_CMP_IN_REGS flag is set, this function will be called - * to decide, whether a compound value should be returned in registers. - * This function must return the number of used registers and fill in the modes - * of the registers to use. Up to MAX_REGISTER_RET_VAL registers can be used. - */ - int (*ret_compound_in_regs)(ir_type *compound_tp, ir_mode **modes); -} lower_params_t; - -/** - * Lower calls with compound parameter and return types. - * This function does the following transformations: - * - * If LF_COMPOUND_PARAM is set: - * - * - Copy compound parameters to a new location on the callers - * stack and transmit the address of this new location - * - * If LF_COMPOUND_RETURN is set: - * - * - Adds a new (hidden) pointer parameter for - * any return compound type. The return type is replaced by void - * or if LOWERING_FLAGS_RETURN_HIDDEN is set by the address. - * - * - Use of the hidden parameters in the function code. - * - * - Change all calls to functions with compound return - * by providing space for the hidden parameter on the callers - * stack. + * @defgroup ir_lowering Lowering * - * - Replace a possible block copy after the function call. + * Lowering is the process of transforming a highlevel representation + * (a representation closer to the sourcecode) into a lower-level representation + * (something closer to the target machine). * - * General: - * - * - Changes the types of methods and calls to the lowered ones - * - * - lower all method types of existing entities - * - * In pseudo-code, the following transformation is done: - * - @code - struct x ret = func(a, b); - @endcode - * - * is translated into - @code - struct x ret; - func(&ret, a, b); - @endcode - * - * If the function returns only one possible result, the copy-on-return - * optimization is done, ie. - @code - struct x func(a) { - struct x ret; - ret.a = a; - return ret; - } - @endcode - * - * is transformed into - * - @code - void func(struct x *ret, a) { - ret->a = a; - } - @endcode - * - * @param params A structure containing the control parameter for this - * transformation. - * - * During the transformation, pointer types must be created or reused. - * The caller can provide params->find_pointer_type for this task to - * reduce the number of created pointer types. - * If params->find_pointer_type is NULL, new pointer types - * are always created automatically. + * @{ */ -FIRM_API void lower_calls_with_compounds(const lower_params_t *params); /** - * Lower CopyB nodes of size smaller that max_size into Loads/Stores + * Lower small CopyB nodes to Load/Store nodes, preserve medium-sized CopyB + * nodes and replace large CopyBs by a call to memcpy, depending on the given + * parameters. + * + * Small CopyB nodes (size <= max_small_size) are turned into a series of + * loads and stores. + * Medium-sized CopyB nodes (max_small_size < size < min_large_size) are + * left untouched. + * Large CopyB nodes (size >= min_large_size) are turned into a memcpy call. + * + * @param irg The graph to be lowered. + * @param max_small_size The maximum number of bytes for a CopyB node so + * that it is still considered 'small'. + * @param min_large_size The minimum number of bytes for a CopyB node so + * that it is regarded as 'large'. + * @param allow_misalignments Backend can handle misaligned loads and stores. */ -FIRM_API void lower_CopyB(ir_graph *irg, unsigned max_size, - unsigned native_mode_bytes); +FIRM_API void lower_CopyB(ir_graph *irg, unsigned max_small_size, + unsigned min_large_size, int allow_misalignments); /** * Lowers all Switches (Cond nodes with non-boolean mode) depending on spare_size. * They will either remain the same or be converted into if-cascades. * * @param irg The ir graph to be lowered. + * @param small_switch If switch has <= cases then change it to an if-cascade. * @param spare_size Allowed spare size for table switches in machine words. * (Default in edgfe: 128) * @param allow_out_of_bounds backend can handle out-of-bounds values * (values bigger than minimum and maximum proj * number) */ -FIRM_API void lower_switch(ir_graph *irg, unsigned spare_size, - int allow_out_of_bounds); - -/** - * A callback type for creating an intrinsic entity for a given opcode. - * - * @param method the method type of the emulation function entity - * @param op the emulated ir_op - * @param imode the input mode of the emulated opcode - * @param omode the output mode of the emulated opcode - * @param context the context parameter - */ -typedef ir_entity *(create_intrinsic_fkt)(ir_type *method, const ir_op *op, - const ir_mode *imode, - const ir_mode *omode, void *context); - -/** - * The lowering parameter description. - */ -typedef struct lwrdw_param_t { - unsigned little_endian : 1; /**< if true should be lowered for little endian, else big endian */ - unsigned doubleword_size; /**< bitsize of the doubleword mode */ - create_intrinsic_fkt *create_intrinsic; /**< callback that creates the intrinsic entity */ - void *ctx; /**< context parameter for the creator function */ -} lwrdw_param_t; - -/** - * Lower all double word operations. - * - * @param param parameter for lowering - */ -FIRM_API void lower_dw_ops(const lwrdw_param_t *param); - -/** - * Default implementation. Context is unused. - */ -FIRM_API ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op, - const ir_mode *imode, - const ir_mode *omode, - void *context); +FIRM_API void lower_switch(ir_graph *irg, unsigned small_switch, + unsigned spare_size, int allow_out_of_bounds); /** * Replaces SymConsts by a real constant if possible. @@ -211,25 +83,20 @@ FIRM_API ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op, * Handle bit fields by added And/Or calculations. * * @param irg the graph to lower - * @param lower_bitfields the graph contains old-style bitfield - * constructs * * @note: There is NO lowering ob objects oriented types. This is highly compiler * and ABI specific and should be placed directly in the compiler. */ -FIRM_API void lower_highlevel_graph(ir_graph *irg, int lower_bitfields); +FIRM_API void lower_highlevel_graph(ir_graph *irg); /** * Creates an ir_graph pass for lower_highlevel_graph(). * * @param name the name of this pass or NULL - * @param lower_bitfields the graph contains old-style bitfield - * constructs * * @return the newly created ir_graph pass */ -FIRM_API ir_graph_pass_t *lower_highlevel_graph_pass(const char *name, - int lower_bitfields); +FIRM_API ir_graph_pass_t *lower_highlevel_graph_pass(const char *name); /** * Replaces SymConsts by a real constant if possible. @@ -240,7 +107,7 @@ FIRM_API ir_graph_pass_t *lower_highlevel_graph_pass(const char *name, * @note There is NO lowering of objects oriented types. This is highly compiler * and ABI specific and should be placed directly in the compiler. */ -FIRM_API void lower_highlevel(int lower_bitfields); +FIRM_API void lower_highlevel(void); /** * does the same as lower_highlevel for all nodes on the const code irg @@ -256,28 +123,6 @@ FIRM_API void lower_const_code(void); */ FIRM_API ir_prog_pass_t *lower_const_code_pass(const char *name); -typedef struct lower_mode_b_config_t { - /* mode that is used to transport 0/1 values */ - ir_mode *lowered_mode; - /* preferred mode for the "set" operations (a psi that produces a 0 or 1) */ - ir_mode *lowered_set_mode; - /* whether direct Cond -> Cmps should also be lowered */ - int lower_direct_cmp; -} lower_mode_b_config_t; - -/** - * Lowers mode_b operations to integer arithmetic. After the lowering the only - * operations with mode_b are the Projs of Cmps; the only nodes with mode_b - * inputs are Cond and Psi nodes. - * - * Example: Psi(a < 0, 1, 0) => a >> 31 - * - * @param irg the firm graph to lower - * @param config configuration for mode_b lowerer - */ -FIRM_API void ir_lower_mode_b(ir_graph *irg, - const lower_mode_b_config_t *config); - /** * Used as callback, whenever a lowerable mux is found. The return value * indicates, whether the mux should be lowered. This may be used, to lower @@ -369,7 +214,7 @@ typedef union i_record { * * @return number of found intrinsics. */ -FIRM_API unsigned lower_intrinsics(i_record *list, int length, +FIRM_API size_t lower_intrinsics(i_record *list, size_t length, int part_block_used); /** @@ -381,7 +226,7 @@ FIRM_API unsigned lower_intrinsics(i_record *list, int length, * @param part_block_used set to true if part_block() must be using during lowering */ FIRM_API ir_prog_pass_t *lower_intrinsics_pass(const char *name, i_record *list, - int length, int part_block_used); + size_t length, int part_block_used); /** * A mapper for the integer/float absolute value: type abs(type v). @@ -427,8 +272,19 @@ FIRM_API int i_mapper_pow(ir_node *call, void *ctx); */ FIRM_API int i_mapper_exp(ir_node *call, void *ctx); -#define i_mapper_exp2 i_mapper_exp -#define i_mapper_exp10 i_mapper_exp +/** + * A mapper for the floating point exp2(a): floattype exp2(floattype a); + * + * @return 1 if the exp call was removed, 0 else. + */ +FIRM_API int i_mapper_exp2(ir_node *call, void *ctx); + +/** + * A mapper for the floating point exp10(a): floattype exp10(floattype a); + * + * @return 1 if the exp call was removed, 0 else. + */ +FIRM_API int i_mapper_exp10(ir_node *call, void *ctx); /** * A mapper for the floating point log(a): floattype log(floattype a); @@ -437,8 +293,19 @@ FIRM_API int i_mapper_exp(ir_node *call, void *ctx); */ FIRM_API int i_mapper_log(ir_node *call, void *ctx); -#define i_mapper_log2 i_mapper_log -#define i_mapper_log10 i_mapper_log +/** + * A mapper for the floating point log(a): floattype log(floattype a); + * + * @return 1 if the log call was removed, 0 else. + */ +FIRM_API int i_mapper_log2(ir_node *call, void *ctx); + +/** + * A mapper for the floating point log(a): floattype log(floattype a); + * + * @return 1 if the log call was removed, 0 else. + */ +FIRM_API int i_mapper_log10(ir_node *call, void *ctx); /** * A mapper for the floating point sin(a): floattype sin(floattype a); @@ -584,7 +451,6 @@ typedef struct runtime_rt { long mem_proj_nr; /**< if >= 0, create a memory ProjM() */ long regular_proj_nr; /**< if >= 0, create a regular ProjX() */ long exc_proj_nr; /**< if >= 0, create a exception ProjX() */ - long exc_mem_proj_nr; /**< if >= 0, create a exception memory ProjM() */ long res_proj_nr; /**< if >= 0, first result projection number */ } runtime_rt; @@ -649,6 +515,8 @@ typedef struct runtime_rt { */ FIRM_API int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt); +/** @} */ + #include "end.h" #endif