/* * 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 * */ #ifndef BRW_FS_LIVE_VARIABLES_H #define BRW_FS_LIVE_VARIABLES_H #include "brw_fs.h" #include "util/bitset.h" struct cfg_t; namespace brw { struct block_data { /** * Which variables are defined before being used in the block. * * Note that for our purposes, "defined" means unconditionally, completely * defined. */ BITSET_WORD *def; /** * Which variables are used before being defined in the block. */ BITSET_WORD *use; /** Which defs reach the entry point of the block. */ BITSET_WORD *livein; /** Which defs reach the exit point of the block. */ BITSET_WORD *liveout; BITSET_WORD flag_def[1]; BITSET_WORD flag_use[1]; BITSET_WORD flag_livein[1]; BITSET_WORD flag_liveout[1]; }; class fs_live_variables { public: DECLARE_RALLOC_CXX_OPERATORS(fs_live_variables) fs_live_variables(fs_visitor *v, const cfg_t *cfg); ~fs_live_variables(); bool vars_interfere(int a, int b); int var_from_reg(const fs_reg ®) const { return var_from_vgrf[reg.nr] + reg.offset / REG_SIZE; } /** Map from virtual GRF number to index in block_data arrays. */ int *var_from_vgrf; /** * Map from any index in block_data to the virtual GRF containing it. * * For alloc.sizes of [1, 2, 3], vgrf_from_var would contain * [0, 1, 1, 2, 2, 2]. */ int *vgrf_from_var; int num_vars; int num_vgrfs; int bitset_words; /** @{ * Final computed live ranges for each var (each component of each virtual * GRF). */ int *start; int *end; /** @} */ /** Per-basic-block information on live variables */ struct block_data *block_data; protected: void setup_def_use(); void setup_one_read(struct block_data *bd, fs_inst *inst, int ip, const fs_reg ®); void setup_one_write(struct block_data *bd, fs_inst *inst, int ip, const fs_reg ®); void compute_live_variables(); void compute_start_end(); fs_visitor *v; const cfg_t *cfg; void *mem_ctx; }; } /* namespace brw */ #endif /* BRW_FS_LIVE_VARIABLES_H */