2 * Copyright © 2012 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Eric Anholt <eric@anholt.net>
29 #include "main/bitset.h"
37 * Which variables are defined before being used in the block.
39 * Note that for our purposes, "defined" means unconditionally, completely
45 * Which variables are used before being defined in the block.
49 /** Which defs reach the entry point of the block. */
52 /** Which defs reach the exit point of the block. */
56 class fs_live_variables
{
58 DECLARE_RALLOC_CXX_OPERATORS(fs_live_variables
)
60 fs_live_variables(fs_visitor
*v
, const cfg_t
*cfg
);
63 bool vars_interfere(int a
, int b
);
64 int var_from_reg(fs_reg
*reg
);
66 /** Map from virtual GRF number to index in block_data arrays. */
70 * Map from any index in block_data to the virtual GRF containing it.
72 * For virtual_grf_sizes of [1, 2, 3], vgrf_from_var would contain
82 * Final computed live ranges for each var (each component of each virtual
89 /** Per-basic-block information on live variables */
90 struct block_data
*bd
;
94 void setup_one_read(bblock_t
*block
, fs_inst
*inst
, int ip
, fs_reg reg
);
95 void setup_one_write(bblock_t
*block
, fs_inst
*inst
, int ip
, fs_reg reg
);
96 void compute_live_variables();
97 void compute_start_end();
105 } /* namespace brw */