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| 1901 | 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 ir_variable_refcount.h |
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| 26 | * |
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| 27 | * Provides a visitor which produces a list of variables referenced, |
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| 28 | * how many times they were referenced and assigned, and whether they |
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| 29 | * were defined in the scope. |
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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 "glsl_types.h" |
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| 35 | |||
| 36 | class variable_entry : public exec_node |
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| 37 | { |
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| 38 | public: |
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| 39 | variable_entry(ir_variable *var); |
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| 40 | |||
| 41 | ir_variable *var; /* The key: the variable's pointer. */ |
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| 42 | ir_assignment *assign; /* An assignment to the variable, if any */ |
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| 43 | |||
| 44 | /** Number of times the variable is referenced, including assignments. */ |
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| 45 | unsigned referenced_count; |
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| 46 | |||
| 47 | /** Number of times the variable is assigned. */ |
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| 48 | unsigned assigned_count; |
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| 49 | |||
| 50 | bool declaration; /* If the variable had a decl in the instruction stream */ |
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| 51 | }; |
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| 52 | |||
| 53 | class ir_variable_refcount_visitor : public ir_hierarchical_visitor { |
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| 54 | public: |
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| 55 | ir_variable_refcount_visitor(void) |
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| 56 | { |
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| 57 | this->mem_ctx = ralloc_context(NULL); |
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| 58 | this->variable_list.make_empty(); |
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| 59 | } |
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| 60 | |||
| 61 | ~ir_variable_refcount_visitor(void) |
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| 62 | { |
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| 63 | ralloc_free(this->mem_ctx); |
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| 64 | } |
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| 65 | |||
| 66 | virtual ir_visitor_status visit(ir_variable *); |
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| 67 | virtual ir_visitor_status visit(ir_dereference_variable *); |
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| 68 | |||
| 69 | virtual ir_visitor_status visit_enter(ir_function_signature *); |
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| 70 | virtual ir_visitor_status visit_leave(ir_assignment *); |
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| 71 | |||
| 72 | variable_entry *get_variable_entry(ir_variable *var); |
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| 73 | |||
| 74 | /* List of variable_entry */ |
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| 75 | exec_list variable_list; |
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| 76 | |||
| 77 | void *mem_ctx; |
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| 78 | }; |