1 /* 2 * Copyright 2012 Intel Corporation 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 * Authors: 24 * Eric Anholt <eric (at) anholt.net> 25 * 26 */ 27 28 #include "brw_fs.h" 29 30 namespace brw { 31 32 struct block_data { 33 /** 34 * Which variables are defined before being used in the block. 35 * 36 * Note that for our purposes, "defined" means unconditionally, completely 37 * defined. 38 */ 39 bool *def; 40 41 /** 42 * Which variables are used before being defined in the block. 43 */ 44 bool *use; 45 46 /** Which defs reach the entry point of the block. */ 47 bool *livein; 48 49 /** Which defs reach the exit point of the block. */ 50 bool *liveout; 51 }; 52 53 class fs_live_variables { 54 public: 55 static void* operator new(size_t size, void *ctx) 56 { 57 void *node; 58 59 node = rzalloc_size(ctx, size); 60 assert(node != NULL); 61 62 return node; 63 } 64 65 fs_live_variables(fs_visitor *v, fs_cfg *cfg); 66 ~fs_live_variables(); 67 68 void setup_def_use(); 69 void compute_live_variables(); 70 71 fs_visitor *v; 72 fs_cfg *cfg; 73 void *mem_ctx; 74 75 int num_vars; 76 77 /** Per-basic-block information on live variables */ 78 struct block_data *bd; 79 }; 80 81 } /* namespace brw */ 82
