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| 5563 | serge | 1 | /* |
| 2 | * Copyright © 2012 Intel Corporation |
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| 3 | * |
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| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 5 | * copy of this software and associated documentation files (the "Software"), |
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| 6 | * to deal in the Software without restriction, including without limitation |
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| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 9 | * Software is furnished to do so, subject to the following conditions: |
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| 10 | * |
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| 11 | * The above copyright notice and this permission notice (including the next |
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| 12 | * paragraph) shall be included in all copies or substantial portions of the |
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| 13 | * Software. |
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| 14 | * |
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| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
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| 21 | * IN THE SOFTWARE. |
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| 22 | * |
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| 23 | * Authors: |
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| 24 | * Eric Anholt |
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| 25 | * |
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| 26 | */ |
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| 27 | |||
| 28 | #include "brw_fs.h" |
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| 29 | #include "main/bitset.h" |
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| 30 | |||
| 31 | namespace brw { |
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| 32 | |||
| 33 | struct block_data { |
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| 34 | /** |
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| 35 | * Which variables are defined before being used in the block. |
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| 36 | * |
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| 37 | * Note that for our purposes, "defined" means unconditionally, completely |
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| 38 | * defined. |
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| 39 | */ |
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| 40 | BITSET_WORD *def; |
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| 41 | |||
| 42 | /** |
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| 43 | * Which variables are used before being defined in the block. |
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| 44 | */ |
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| 45 | BITSET_WORD *use; |
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| 46 | |||
| 47 | /** Which defs reach the entry point of the block. */ |
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| 48 | BITSET_WORD *livein; |
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| 49 | |||
| 50 | /** Which defs reach the exit point of the block. */ |
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| 51 | BITSET_WORD *liveout; |
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| 52 | }; |
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| 53 | |||
| 54 | class fs_live_variables { |
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| 55 | public: |
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| 56 | static void* operator new(size_t size, void *ctx) |
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| 57 | { |
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| 58 | void *node; |
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| 59 | |||
| 60 | node = rzalloc_size(ctx, size); |
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| 61 | assert(node != NULL); |
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| 62 | |||
| 63 | return node; |
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| 64 | } |
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| 65 | |||
| 66 | fs_live_variables(fs_visitor *v, cfg_t *cfg); |
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| 67 | ~fs_live_variables(); |
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| 68 | |||
| 69 | void setup_def_use(); |
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| 70 | void compute_live_variables(); |
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| 71 | |||
| 72 | fs_visitor *v; |
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| 73 | cfg_t *cfg; |
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| 74 | void *mem_ctx; |
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| 75 | |||
| 76 | int num_vars; |
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| 77 | int bitset_words; |
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| 78 | |||
| 79 | /** Per-basic-block information on live variables */ |
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| 80 | struct block_data *bd; |
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| 81 | }; |
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| 82 | |||
| 83 | } /* namespace brw */ |