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https://git.code.sf.net/p/quake/quakeforge
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d8a78fc849
Because the aliases were treated as live, every alias of a temp resulted in an assignment, which proved to be quite significant (4-5 assignments in some simple GA expressions). By using an alias node in the dag, the unaliased temp can be marked live while the alias is treated as an operation rather than an operand. Now my GA expressions have no superfluous assignments (generally no assignments at all).
188 lines
6.2 KiB
C
188 lines
6.2 KiB
C
/*
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statement.h
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Internal statements
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Copyright (C) 2011 Bill Currie <bill@taniwha.org>
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Author: Bill Currie <bill@taniwha.org>
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Date: 2011/01/18
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifndef statement_h
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#define statement_h
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#include "QF/progs/pr_comp.h"
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typedef enum {
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op_def,
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op_value,
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op_label,
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op_temp,
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op_alias,
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op_nil,
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op_pseudo,
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} op_type_e;
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struct expr_s;
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typedef struct tempop_s {
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struct def_s *def;
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int offset;
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struct type_s *type;
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struct flowvar_s *flowvar;
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struct daglabel_s *daglabel;
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struct operand_s *alias;
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struct operand_s *alias_ops;
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int users;
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int flowaddr; ///< "address" of temp in flow analysis, != 0
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} tempop_t;
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typedef struct pseudoop_s {
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struct pseudoop_s *next;
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const char *name;
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struct flowvar_s *flowvar;
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void (*uninitialized) (struct expr_s *expr, struct pseudoop_s *op);
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} pseudoop_t;
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typedef struct operand_s {
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struct operand_s *next;
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op_type_e op_type;
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struct type_s *type; ///< possibly override def's/nil's type
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int size; ///< for structures
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int width; ///< for SIMD selection
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struct expr_s *expr; ///< expression generating this operand
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void *return_addr; ///< who created this operand
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union {
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struct def_s *def;
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struct ex_value_s *value;
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struct ex_label_s *label;
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tempop_t tempop;
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struct operand_s *alias;
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pseudoop_t *pseudoop;
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};
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} operand_t;
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/** Overall type of statement.
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Statement types are broken down into expressions (binary and unary,
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includes address and pointer dereferencing (read)), assignment, pointer
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assignment (write to dereference pointer), move (special case of
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assignment), pointer move (special case of pointer assignment), state,
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function related (call, rcall, return and done), and flow control
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(conditional branches, goto, jump (single pointer and jump table)).
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*/
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typedef enum {
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st_none, ///< not a (valid) statement. Used in dags.
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st_alias, ///< not a (valid) statement. Used in dags.
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st_expr, ///< c = a op b; or c = op a;
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st_assign, ///< b = a
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st_ptrassign, ///< *b = a; or *(b + c) = a;
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st_move, ///< memcpy (c, a, b); c and a are direct def references
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st_ptrmove, ///< memcpy (c, a, b); c and a are pointers
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st_memset, ///< memset (c, a, b); c is direct def reference
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st_ptrmemset, ///< memset (c, a, b); c is pointer
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st_state, ///< state (a, b); or state (a, b, c)
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st_func, ///< call, rcall or return/done
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st_flow, ///< if/ifa/ifae/ifb/ifbe/ifnot or goto or jump/jumpb
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st_address, ///< lea
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} st_type_t;
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typedef struct statement_s {
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struct statement_s *next;
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st_type_t type;
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int number; ///< number of this statement in function
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const char *opcode;
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operand_t *opa;
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operand_t *opb;
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operand_t *opc;
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struct expr_s *expr; ///< source expression for this statement
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operand_t *use; ///< list of auxiliary operands used
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operand_t *def; ///< list of auxiliary operands defined
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operand_t *kill; ///< list of auxiliary operands killed
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int first_use;
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int num_use;
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int first_def;
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int num_def;
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} statement_t;
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typedef struct sblock_s {
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struct sblock_s *next;
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struct reloc_s *relocs;
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struct ex_label_s *labels;
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struct flownode_s *flownode;///< flow node for this block
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int offset; ///< offset of first statement of block
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int reachable;
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int number; ///< number of this block in flow graph
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statement_t *statements;
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statement_t **tail;
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} sblock_t;
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struct expr_s;
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struct type_s;
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struct dstring_s;
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extern const char * const op_type_names[];
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extern const char * const st_type_names[];
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const char *optype_str (op_type_e type) __attribute__((const));
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operand_t *nil_operand (struct type_s *type, struct expr_s *expr);
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operand_t *def_operand (struct def_s *def, struct type_s *type,
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struct expr_s *expr);
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operand_t *return_operand (struct type_s *type, struct expr_s *expr);
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operand_t *value_operand (struct ex_value_s *value, struct expr_s *expr);
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int tempop_overlap (tempop_t *t1, tempop_t *t2) __attribute__((pure));
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operand_t *temp_operand (struct type_s *type, struct expr_s *expr);
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int tempop_visit_all (tempop_t *tempop, int overlap,
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int (*visit) (tempop_t *, void *), void *data);
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operand_t *offset_alias_operand (struct type_s *type, int offset,
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operand_t *aop, struct expr_s *expr);
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operand_t *alias_operand (struct type_s *type, operand_t *op,
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struct expr_s *expr);
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operand_t *label_operand (struct expr_s *label);
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void free_operand (operand_t *op);
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sblock_t *new_sblock (void);
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void free_sblock (sblock_t *sblock);
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statement_t *new_statement (st_type_t type, const char *opcode,
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struct expr_s *expr);
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int statement_is_cond (statement_t *s) __attribute__((pure));
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int statement_is_goto (statement_t *s) __attribute__((pure));
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int statement_is_jumpb (statement_t *s) __attribute__((pure));
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int statement_is_call (statement_t *s) __attribute__((pure));
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int statement_is_return (statement_t *s) __attribute__((pure));
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sblock_t *statement_get_target (statement_t *s) __attribute__((pure));
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sblock_t **statement_get_targetlist (statement_t *s);
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void sblock_add_statement (sblock_t *sblock, statement_t *statement);
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sblock_t *make_statements (struct expr_s *expr);
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sblock_t *statement_slist (sblock_t *sblock, struct expr_s *e);
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void statements_count_temps (sblock_t *sblock);
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void print_operand (operand_t *op);
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void print_statement (statement_t *s);
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void dump_dot_sblock (void *data, const char *fname);
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void dot_sblock (struct dstring_s *dstr, sblock_t *sblock, int blockno);
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void print_sblock (sblock_t *sblock, const char *filename);
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const char *operand_string (operand_t *op);
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#endif//statement_h
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