1 #ifndef MSP_GL_SL_OPTIMIZE_H_
2 #define MSP_GL_SL_OPTIMIZE_H_
13 /** Finds functions which are candidates for inlining. Currently this means
14 functions which have no parameters, contain no more than one return statement,
15 and are only called once. */
16 class InlineableFunctionLocator: private TraversingVisitor
19 std::map<FunctionDeclaration *, unsigned> refcounts;
20 std::set<FunctionDeclaration *> inlineable;
21 FunctionDeclaration *current_function;
22 unsigned return_count;
25 InlineableFunctionLocator();
27 const std::set<FunctionDeclaration *> &apply(Stage &s) { s.content.visit(*this); return inlineable; }
30 virtual void visit(FunctionCall &);
31 virtual void visit(FunctionDeclaration &);
32 virtual void visit(Conditional &);
33 virtual void visit(Iteration &);
34 virtual void visit(Return &);
37 /** Injects statements from one function into another. Local variables are
38 renamed to avoid conflicts. After inlining, uses NodeReorderer to cause
39 dependencies of the inlined statements to appear before the target function. */
40 class InlineContentInjector: private TraversingVisitor
43 FunctionDeclaration *source_func;
45 std::map<std::string, VariableDeclaration *> variable_map;
48 RefPtr<Statement> r_inlined_statement;
49 std::set<Node *> dependencies;
50 std::string r_result_name;
53 InlineContentInjector();
55 const std::string &apply(Stage &, FunctionDeclaration &, Block &, const NodeList<Statement>::iterator &, FunctionDeclaration &);
58 std::string create_unused_name(const std::string &, bool);
60 virtual void visit(VariableReference &);
61 virtual void visit(InterfaceBlockReference &);
62 virtual void visit(FunctionCall &);
63 virtual void visit(VariableDeclaration &);
64 virtual void visit(Return &);
67 /** Inlines functions. Internally uses InlineableFunctionLocator to find
68 candidate functions. Only functions which consist of a single return statement
70 class FunctionInliner: private TraversingVisitor
74 std::set<FunctionDeclaration *> inlineable;
75 FunctionDeclaration *current_function;
76 NodeList<Statement>::iterator insert_point;
77 RefPtr<Expression> r_inline_result;
86 void visit_and_inline(RefPtr<Expression> &);
88 virtual void visit(Block &);
89 virtual void visit(UnaryExpression &);
90 virtual void visit(BinaryExpression &);
91 virtual void visit(MemberAccess &);
92 virtual void visit(FunctionCall &);
93 virtual void visit(ExpressionStatement &);
94 virtual void visit(VariableDeclaration &);
95 virtual void visit(FunctionDeclaration &);
96 virtual void visit(Conditional &);
97 virtual void visit(Iteration &);
98 virtual void visit(Return &);
101 /** Inlines variables into expressions. Variables with trivial values (those
102 consisting of a single literal or variable reference) are always inlined.
103 Variables which are only referenced once are also inlined. */
104 class ExpressionInliner: private TraversingVisitor
107 struct ExpressionInfo
109 Expression *expression;
111 RefPtr<Expression> *inline_point;
112 const Operator *inner_oper;
113 const Operator *outer_oper;
121 std::map<VariableDeclaration *, ExpressionInfo> expressions;
122 ExpressionInfo *r_ref_info;
127 Block *iteration_body;
128 const Operator *r_oper;
136 void visit_and_record(RefPtr<Expression> &, const Operator *, bool);
137 void inline_expression(Expression &, RefPtr<Expression> &, const Operator *, const Operator *, bool);
138 virtual void visit(Block &);
139 virtual void visit(VariableReference &);
140 virtual void visit(MemberAccess &);
141 virtual void visit(UnaryExpression &);
142 virtual void visit(BinaryExpression &);
143 virtual void visit(Assignment &);
144 virtual void visit(FunctionCall &);
145 virtual void visit(VariableDeclaration &);
146 virtual void visit(Conditional &);
147 virtual void visit(Iteration &);
148 virtual void visit(Return &);
151 /** Removes conditional statements and loops where the condition can be
152 determined as constant at compile time. */
153 class ConstantConditionEliminator: private TraversingVisitor
156 NodeList<Statement>::iterator insert_point;
157 std::set<Node *> nodes_to_remove;
163 virtual void visit(Block &);
164 virtual void visit(Conditional &);
165 virtual void visit(Iteration &);
168 /** Removes types which are not used anywhere. */
169 class UnusedTypeRemover: private TraversingVisitor
172 std::set<Node *> unused_nodes;
178 virtual void visit(Literal &);
179 virtual void visit(UnaryExpression &);
180 virtual void visit(BinaryExpression &);
181 virtual void visit(FunctionCall &);
182 virtual void visit(BasicTypeDeclaration &);
183 virtual void visit(ImageTypeDeclaration &);
184 virtual void visit(StructDeclaration &);
185 virtual void visit(VariableDeclaration &);
186 virtual void visit(FunctionDeclaration &);
189 /** Removes variable declarations with no references to them. Assignment
190 statements where the result is not used are also removed. */
191 class UnusedVariableRemover: private TraversingVisitor
197 std::vector<Node *> assignments;
198 bool conditionally_assigned;
204 typedef std::map<VariableDeclaration *, VariableInfo> BlockVariableMap;
206 std::set<Node *> unused_nodes;
207 std::map<VariableDeclaration *, Node *> aggregates;
209 std::vector<BlockVariableMap> variables;
210 Assignment *r_assignment;
211 bool assignment_target;
212 bool r_assign_to_subfield;
216 UnusedVariableRemover();
221 virtual void visit(VariableReference &);
222 virtual void visit(InterfaceBlockReference &);
223 virtual void visit(MemberAccess &);
224 virtual void visit(UnaryExpression &);
225 virtual void visit(BinaryExpression &);
226 virtual void visit(Assignment &);
227 void record_assignment(VariableDeclaration &, Node &, bool);
228 void clear_assignments(VariableInfo &, bool);
229 virtual void visit(FunctionCall &);
230 virtual void visit(ExpressionStatement &);
231 virtual void visit(StructDeclaration &);
232 virtual void visit(VariableDeclaration &);
233 virtual void visit(InterfaceBlock &);
234 virtual void visit(FunctionDeclaration &);
235 void merge_down_variables();
236 virtual void visit(Conditional &);
237 virtual void visit(Iteration &);
240 /** Removes function declarations with no references to them. */
241 class UnusedFunctionRemover: private TraversingVisitor
244 std::set<Node *> unused_nodes;
245 std::set<FunctionDeclaration *> used_definitions;
248 bool apply(Stage &s);
251 virtual void visit(FunctionCall &);
252 virtual void visit(FunctionDeclaration &);