1 /* 2 * Copyright 2014 Connor Abbott 3 * 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: 10 * 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 13 * Software. 14 * 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 21 * IN THE SOFTWARE. 22 */ 23 24 #pragma once 25 26 #include "nir.h" 27 28 /** 29 * This file defines functions for creating, destroying, and manipulating an 30 * "instruction set," which is an abstraction for finding duplicate 31 * instructions using a hash set. Note that the question of whether an 32 * instruction is actually a duplicate (e.g. whether it has any side effects) 33 * is handled transparently. The user can pass any instruction to 34 * nir_instr_set_add_or_rewrite() and nir_instr_set_remove(), and if the 35 * instruction isn't safe to rewrite or isn't supported, it's silently 36 * removed. 37 */ 38 39 /*@{*/ 40 41 /** Creates an instruction set, using a given ralloc mem_ctx */ 42 struct set *nir_instr_set_create(void *mem_ctx); 43 44 /** Destroys an instruction set. */ 45 void nir_instr_set_destroy(struct set *instr_set); 46 47 /** 48 * Adds an instruction to an instruction set if it doesn't exist, or if it 49 * does already exist, rewrites all uses of it to point to the other 50 * already-inserted instruction. Returns 'true' if the uses of the instruction 51 * were rewritten. 52 */ 53 bool nir_instr_set_add_or_rewrite(struct set *instr_set, nir_instr *instr); 54 55 /** 56 * Removes an instruction from an instruction set, so that other instructions 57 * won't be merged with it. 58 */ 59 void nir_instr_set_remove(struct set *instr_set, nir_instr *instr); 60 61 /*@}*/ 62 63
