/*
* Copyright © 2012 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*
*/
#pragma once
#ifndef BRW_CFG_H
#define BRW_CFG_H
#include "brw_shader.h"
struct bblock_t;
struct bblock_link {
#ifdef __cplusplus
DECLARE_RALLOC_CXX_OPERATORS(bblock_link)
bblock_link(bblock_t *block)
: block(block)
{
}
#endif
struct exec_node link;
struct bblock_t *block;
};
struct backend_instruction;
struct bblock_t {
#ifdef __cplusplus
DECLARE_RALLOC_CXX_OPERATORS(bblock_t)
explicit bblock_t(cfg_t *cfg);
void add_successor(void *mem_ctx, bblock_t *successor);
bool is_predecessor_of(const bblock_t *block) const;
bool is_successor_of(const bblock_t *block) const;
bool can_combine_with(const bblock_t *that) const;
void combine_with(bblock_t *that);
void dump(backend_visitor *v) const;
backend_instruction *start();
const backend_instruction *start() const;
backend_instruction *end();
const backend_instruction *end() const;
bblock_t *next();
const bblock_t *next() const;
bblock_t *prev();
const bblock_t *prev() const;
bool starts_with_control_flow() const;
bool ends_with_control_flow() const;
backend_instruction *first_non_control_flow_inst();
backend_instruction *last_non_control_flow_inst();
#endif
struct exec_node link;
struct cfg_t *cfg;
struct bblock_t *idom;
int start_ip;
int end_ip;
struct exec_list instructions;
struct exec_list parents;
struct exec_list children;
int num;
};
static inline struct backend_instruction *
bblock_start(struct bblock_t *block)
{
return (struct backend_instruction *)exec_list_get_head(&block->instructions);
}
static inline const struct backend_instruction *
bblock_start_const(const struct bblock_t *block)
{
return (const struct backend_instruction *)exec_list_get_head_const(&block->instructions);
}
static inline struct backend_instruction *
bblock_end(struct bblock_t *block)
{
return (struct backend_instruction *)exec_list_get_tail(&block->instructions);
}
static inline const struct backend_instruction *
bblock_end_const(const struct bblock_t *block)
{
return (const struct backend_instruction *)exec_list_get_tail_const(&block->instructions);
}
static inline struct bblock_t *
bblock_next(struct bblock_t *block)
{
return (struct bblock_t *)block->link.next;
}
static inline const struct bblock_t *
bblock_next_const(const struct bblock_t *block)
{
return (const struct bblock_t *)block->link.next;
}
static inline struct bblock_t *
bblock_prev(struct bblock_t *block)
{
return (struct bblock_t *)block->link.prev;
}
static inline const struct bblock_t *
bblock_prev_const(const struct bblock_t *block)
{
return (const struct bblock_t *)block->link.prev;
}
static inline bool
bblock_starts_with_control_flow(const struct bblock_t *block)
{
enum opcode op = bblock_start_const(block)->opcode;
return op == BRW_OPCODE_DO || op == BRW_OPCODE_ENDIF;
}
static inline bool
bblock_ends_with_control_flow(const struct bblock_t *block)
{
enum opcode op = bblock_end_const(block)->opcode;
return op == BRW_OPCODE_IF ||
op == BRW_OPCODE_ELSE ||
op == BRW_OPCODE_WHILE ||
op == BRW_OPCODE_BREAK ||
op == BRW_OPCODE_CONTINUE;
}
static inline struct backend_instruction *
bblock_first_non_control_flow_inst(struct bblock_t *block)
{
struct backend_instruction *inst = bblock_start(block);
if (bblock_starts_with_control_flow(block))
#ifdef __cplusplus
inst = (struct backend_instruction *)inst->next;
#else
inst = (struct backend_instruction *)inst->link.next;
#endif
return inst;
}
static inline struct backend_instruction *
bblock_last_non_control_flow_inst(struct bblock_t *block)
{
struct backend_instruction *inst = bblock_end(block);
if (bblock_ends_with_control_flow(block))
#ifdef __cplusplus
inst = (struct backend_instruction *)inst->prev;
#else
inst = (struct backend_instruction *)inst->link.prev;
#endif
return inst;
}
#ifdef __cplusplus
inline backend_instruction *
bblock_t::start()
{
return bblock_start(this);
}
inline const backend_instruction *
bblock_t::start() const
{
return bblock_start_const(this);
}
inline backend_instruction *
bblock_t::end()
{
return bblock_end(this);
}
inline const backend_instruction *
bblock_t::end() const
{
return bblock_end_const(this);
}
inline bblock_t *
bblock_t::next()
{
return bblock_next(this);
}
inline const bblock_t *
bblock_t::next() const
{
return bblock_next_const(this);
}
inline bblock_t *
bblock_t::prev()
{
return bblock_prev(this);
}
inline const bblock_t *
bblock_t::prev() const
{
return bblock_prev_const(this);
}
inline bool
bblock_t::starts_with_control_flow() const
{
return bblock_starts_with_control_flow(this);
}
inline bool
bblock_t::ends_with_control_flow() const
{
return bblock_ends_with_control_flow(this);
}
inline backend_instruction *
bblock_t::first_non_control_flow_inst()
{
return bblock_first_non_control_flow_inst(this);
}
inline backend_instruction *
bblock_t::last_non_control_flow_inst()
{
return bblock_last_non_control_flow_inst(this);
}
#endif
struct cfg_t {
#ifdef __cplusplus
DECLARE_RALLOC_CXX_OPERATORS(cfg_t)
cfg_t(exec_list *instructions);
~cfg_t();
void remove_block(bblock_t *block);
bblock_t *new_block();
void set_next_block(bblock_t **cur, bblock_t *block, int ip);
void make_block_array();
void calculate_idom();
static bblock_t *intersect(bblock_t *b1, bblock_t *b2);
void dump(backend_visitor *v);
void dump_cfg();
void dump_domtree();
#endif
void *mem_ctx;
/** Ordered list (by ip) of basic blocks */
struct exec_list block_list;
struct bblock_t **blocks;
int num_blocks;
bool idom_dirty;
};
/* Note that this is implemented with a double for loop -- break will
* break from the inner loop only!
*/
#define foreach_block_and_inst(__block, __type, __inst, __cfg) \
foreach_block (__block, __cfg) \
foreach_inst_in_block (__type, __inst, __block)
/* Note that this is implemented with a double for loop -- break will
* break from the inner loop only!
*/
#define foreach_block_and_inst_safe(__block, __type, __inst, __cfg) \
foreach_block_safe (__block, __cfg) \
foreach_inst_in_block_safe (__type, __inst, __block)
#define foreach_block(__block, __cfg) \
foreach_list_typed (bblock_t, __block, link, &(__cfg)->block_list)
#define foreach_block_reverse(__block, __cfg) \
foreach_list_typed_reverse (bblock_t, __block, link, &(__cfg)->block_list)
#define foreach_block_safe(__block, __cfg) \
foreach_list_typed_safe (bblock_t, __block, link, &(__cfg)->block_list)
#define foreach_inst_in_block(__type, __inst, __block) \
foreach_in_list(__type, __inst, &(__block)->instructions)
#define foreach_inst_in_block_safe(__type, __inst, __block) \
for (__type *__inst = (__type *)__block->instructions.head, \
*__next = (__type *)__inst->next, \
*__end = (__type *)__block->instructions.tail; \
__next != __end; \
__inst = __next, \
__next = (__type *)__next->next)
#define foreach_inst_in_block_reverse(__type, __inst, __block) \
foreach_in_list_reverse(__type, __inst, &(__block)->instructions)
#define foreach_inst_in_block_reverse_safe(__type, __inst, __block) \
foreach_in_list_reverse_safe(__type, __inst, &(__block)->instructions)
#define foreach_inst_in_block_starting_from(__type, __scan_inst, __inst, __block) \
for (__type *__scan_inst = (__type *)__inst->next; \
!__scan_inst->is_tail_sentinel(); \
__scan_inst = (__type *)__scan_inst->next)
#define foreach_inst_in_block_reverse_starting_from(__type, __scan_inst, __inst, __block) \
for (__type *__scan_inst = (__type *)__inst->prev; \
!__scan_inst->is_head_sentinel(); \
__scan_inst = (__type *)__scan_inst->prev)
#endif /* BRW_CFG_H */