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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4358 | Serge | 1 | /* |
| 2 | * Copyright © 2010 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 |
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| 21 | * DEALINGS IN THE SOFTWARE. |
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| 22 | */ |
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| 23 | |||
| 24 | /** |
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| 25 | * \file opt_noop_swizzle.cpp |
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| 26 | * |
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| 27 | * If a swizzle doesn't change the order or count of components, then |
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| 28 | * remove the swizzle so that other optimization passes see the value |
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| 29 | * behind it. |
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| 30 | */ |
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| 31 | |||
| 32 | #include "ir.h" |
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| 33 | #include "ir_visitor.h" |
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| 34 | #include "ir_rvalue_visitor.h" |
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| 35 | #include "glsl_types.h" |
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| 36 | |||
| 37 | namespace { |
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| 38 | |||
| 39 | class ir_noop_swizzle_visitor : public ir_rvalue_visitor { |
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| 40 | public: |
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| 41 | ir_noop_swizzle_visitor() |
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| 42 | { |
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| 43 | this->progress = false; |
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| 44 | } |
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| 45 | |||
| 46 | void handle_rvalue(ir_rvalue **rvalue); |
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| 47 | bool progress; |
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| 48 | }; |
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| 49 | |||
| 50 | } /* unnamed namespace */ |
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| 51 | |||
| 52 | void |
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| 53 | ir_noop_swizzle_visitor::handle_rvalue(ir_rvalue **rvalue) |
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| 54 | { |
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| 55 | if (!*rvalue) |
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| 56 | return; |
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| 57 | |||
| 58 | ir_swizzle *swiz = (*rvalue)->as_swizzle(); |
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| 59 | if (!swiz || swiz->type != swiz->val->type) |
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| 60 | return; |
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| 61 | |||
| 62 | int elems = swiz->val->type->vector_elements; |
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| 63 | if (swiz->mask.x != 0) |
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| 64 | return; |
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| 65 | if (elems >= 2 && swiz->mask.y != 1) |
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| 66 | return; |
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| 67 | if (elems >= 3 && swiz->mask.z != 2) |
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| 68 | return; |
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| 69 | if (elems >= 4 && swiz->mask.w != 3) |
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| 70 | return; |
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| 71 | |||
| 72 | this->progress = true; |
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| 73 | *rvalue = swiz->val; |
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| 74 | } |
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| 75 | |||
| 76 | bool |
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| 77 | do_noop_swizzle(exec_list *instructions) |
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| 78 | { |
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| 79 | ir_noop_swizzle_visitor v; |
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| 80 | visit_list_elements(&v, instructions); |
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| 81 | |||
| 82 | return v.progress; |
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| 83 | } |