1 #include <msp/core/raii.h>
2 #include <msp/strings/format.h>
3 #include <msp/strings/utils.h>
6 #include "programcompiler.h"
14 const char builtins_src[] =
16 "out gl_PerVertex {\n"
17 " vec4 gl_Position;\n"
18 " float gl_ClipDistance[];\n"
22 " vec4 gl_Position;\n"
23 " float gl_ClipDistance[];\n"
25 "out gl_PerVertex {\n"
26 " vec4 gl_Position;\n"
27 " float gl_ClipDistance[];\n"
35 using namespace ProgramSyntax;
37 ProgramCompiler::ProgramCompiler():
42 void ProgramCompiler::compile(const string &source)
45 module = &parser.parse(source);
49 void ProgramCompiler::compile(IO::Base &io, Resources *res)
52 module = &parser.parse(io);
56 void ProgramCompiler::add_shaders(Program &program)
59 throw invalid_operation("ProgramCompiler::add_shaders");
61 string head = "#version 150\n";
62 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
65 program.attach_shader_owned(new VertexShader(head+apply<Formatter>(*i)));
66 else if(i->type==GEOMETRY)
67 program.attach_shader_owned(new GeometryShader(head+apply<Formatter>(*i)));
68 else if(i->type==FRAGMENT)
69 program.attach_shader_owned(new FragmentShader(head+apply<Formatter>(*i)));
72 program.bind_attribute(VERTEX4, "vertex");
73 program.bind_attribute(NORMAL3, "normal");
74 program.bind_attribute(COLOR4_FLOAT, "color");
75 program.bind_attribute(TEXCOORD4, "texcoord");
78 Module *ProgramCompiler::create_builtins_module()
81 Module *module = new Module(parser.parse(builtins_src));
82 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
84 VariableResolver resolver;
85 i->content.visit(resolver);
86 for(map<string, VariableDeclaration *>::iterator j=i->content.variables.begin(); j!=i->content.variables.end(); ++j)
87 j->second->linked_declaration = j->second;
92 Module &ProgramCompiler::get_builtins_module()
94 static RefPtr<Module> builtins_module = create_builtins_module();
95 return *builtins_module;
98 Stage *ProgramCompiler::get_builtins(StageType type)
100 Module &module = get_builtins_module();
101 for(list<Stage>::iterator i=module.stages.begin(); i!=module.stages.end(); ++i)
107 void ProgramCompiler::process()
109 list<Import *> imports = apply<NodeGatherer<Import> >(module->shared);
110 for(list<Import *>::iterator i=imports.end(); i!=imports.begin(); )
111 import((*--i)->module);
112 apply<NodeRemover>(module->shared, set<Node *>(imports.begin(), imports.end()));
114 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
116 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); )
119 i = module->stages.begin();
125 void ProgramCompiler::import(const string &name)
128 throw runtime_error("no resources");
129 RefPtr<IO::Seekable> io = resources->open_raw(name+".glsl");
131 throw runtime_error(format("module %s not found", name));
132 ProgramParser import_parser;
133 Module &imported_module = import_parser.parse(*io);
135 inject_block(module->shared.content, imported_module.shared.content);
136 apply<DeclarationCombiner>(module->shared);
137 for(list<Stage>::iterator i=imported_module.stages.begin(); i!=imported_module.stages.end(); ++i)
139 list<Stage>::iterator j;
140 for(j=module->stages.begin(); (j!=module->stages.end() && j->type<i->type); ++j) ;
141 if(j==module->stages.end() || j->type>i->type)
143 j = module->stages.insert(j, *i);
144 list<Stage>::iterator k = j;
145 if(++k!=module->stages.end())
147 if(j!=module->stages.begin())
148 j->previous = &*--(k=j);
152 inject_block(j->content, i->content);
153 apply<DeclarationCombiner>(*j);
158 void ProgramCompiler::generate(Stage &stage)
160 inject_block(stage.content, module->shared.content);
162 apply<VariableResolver>(stage);
163 apply<InterfaceGenerator>(stage);
164 apply<VariableResolver>(stage);
165 apply<VariableRenamer>(stage);
168 bool ProgramCompiler::optimize(Stage &stage)
170 set<Node *> unused = apply<UnusedVariableLocator>(stage);
171 apply<NodeRemover>(stage, unused);
173 return !unused.empty();
176 void ProgramCompiler::inject_block(Block &target, const Block &source)
178 list<NodePtr<Node> >::iterator insert_point = target.body.begin();
179 for(list<NodePtr<Node> >::const_iterator i=source.body.begin(); i!=source.body.end(); ++i)
180 target.body.insert(insert_point, (*i)->clone());
184 typename T::ResultType ProgramCompiler::apply(Stage &stage)
187 visitor.apply(stage);
188 return visitor.get_result();
191 template<typename T, typename A>
192 typename T::ResultType ProgramCompiler::apply(Stage &stage, const A &arg)
195 visitor.apply(stage);
196 return visitor.get_result();
200 ProgramCompiler::Visitor::Visitor():
204 void ProgramCompiler::Visitor::apply(Stage &s)
206 SetForScope<Stage *> set(stage, &s);
207 stage->content.visit(*this);
211 ProgramCompiler::Formatter::Formatter():
213 parameter_list(false),
217 void ProgramCompiler::Formatter::visit(Literal &literal)
219 formatted += literal.token;
222 void ProgramCompiler::Formatter::visit(ParenthesizedExpression &parexpr)
225 parexpr.expression->visit(*this);
229 void ProgramCompiler::Formatter::visit(VariableReference &var)
231 formatted += var.name;
234 void ProgramCompiler::Formatter::visit(MemberAccess &memacc)
236 memacc.left->visit(*this);
237 formatted += format(".%s", memacc.member);
240 void ProgramCompiler::Formatter::visit(UnaryExpression &unary)
243 formatted += unary.oper;
244 unary.expression->visit(*this);
246 formatted += unary.oper;
249 void ProgramCompiler::Formatter::visit(BinaryExpression &binary)
251 binary.left->visit(*this);
252 formatted += binary.oper;
253 binary.right->visit(*this);
254 formatted += binary.after;
257 void ProgramCompiler::Formatter::visit(Assignment &assign)
259 assign.left->visit(*this);
260 formatted += format(" %s ", assign.oper);
261 assign.right->visit(*this);
264 void ProgramCompiler::Formatter::visit(FunctionCall &call)
266 formatted += format("%s(", call.name);
267 for(vector<NodePtr<Expression> >::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
269 if(i!=call.arguments.begin())
276 void ProgramCompiler::Formatter::visit(ExpressionStatement &expr)
278 expr.expression->visit(*this);
282 void ProgramCompiler::Formatter::visit(Block &block)
287 unsigned brace_indent = indent;
288 bool use_braces = (block.use_braces || (indent && block.body.size()!=1));
290 formatted += format("%s{\n", string(brace_indent*2, ' '));
292 SetForScope<unsigned> set(indent, indent+!formatted.empty());
293 string spaces(indent*2, ' ');
294 for(list<NodePtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); ++i)
296 if(i!=block.body.begin())
304 formatted += format("\n%s}", string(brace_indent*2, ' '));
307 void ProgramCompiler::Formatter::visit(Import &import)
309 formatted += format("import %s;", import.module);
312 void ProgramCompiler::Formatter::visit(Layout &layout)
314 formatted += "layout(";
315 for(vector<Layout::Qualifier>::const_iterator i=layout.qualifiers.begin(); i!=layout.qualifiers.end(); ++i)
317 if(i!=layout.qualifiers.begin())
319 formatted += i->identifier;
320 if(!i->value.empty())
321 formatted += format("=%s", i->value);
323 formatted += format(") %s;", layout.interface);
326 void ProgramCompiler::Formatter::visit(StructDeclaration &strct)
328 formatted += format("struct %s\n", strct.name);
329 strct.members.visit(*this);
333 void ProgramCompiler::Formatter::visit(VariableDeclaration &var)
336 formatted += "const ";
337 if(!var.sampling.empty())
338 formatted += format("%s ", var.sampling);
339 if(!var.interface.empty() && var.interface!=block_interface)
340 formatted += format("%s ", var.interface);
341 formatted += format("%s %s", var.type, var.name);
346 var.array_size->visit(*this);
349 if(var.init_expression)
352 var.init_expression->visit(*this);
358 void ProgramCompiler::Formatter::visit(InterfaceBlock &iface)
360 SetForScope<string> set(block_interface, iface.interface);
361 formatted += format("%s %s\n", iface.interface, iface.name);
362 iface.members.visit(*this);
366 void ProgramCompiler::Formatter::visit(FunctionDeclaration &func)
368 formatted += format("%s %s(", func.return_type, func.name);
369 for(vector<NodePtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
371 if(i!=func.parameters.begin())
373 SetFlag set(parameter_list);
377 if(func.definition==&func)
380 func.body.visit(*this);
386 void ProgramCompiler::Formatter::visit(Conditional &cond)
389 formatted.replace(formatted.rfind('\n'), string::npos, 1, ' ');
394 cond.condition->visit(*this);
397 cond.body.visit(*this);
398 if(!cond.else_body.body.empty())
400 formatted += format("\n%selse\n", string(indent*2, ' '));
401 SetForScope<unsigned> set(else_if, 2);
402 cond.else_body.visit(*this);
406 void ProgramCompiler::Formatter::visit(Iteration &iter)
409 iter.init_statement->visit(*this);
411 iter.condition->visit(*this);
413 iter.loop_expression->visit(*this);
415 iter.body.visit(*this);
418 void ProgramCompiler::Formatter::visit(Return &ret)
420 formatted += "return ";
421 ret.expression->visit(*this);
426 ProgramCompiler::DeclarationCombiner::DeclarationCombiner():
431 void ProgramCompiler::DeclarationCombiner::visit(Block &block)
436 SetForScope<bool> set(toplevel, false);
437 for(list<NodePtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
442 block.body.erase(i++);
448 void ProgramCompiler::DeclarationCombiner::visit(FunctionDeclaration &func)
450 vector<FunctionDeclaration *> &decls = functions[func.name];
453 for(vector<FunctionDeclaration *>::iterator i=decls.begin(); i!=decls.end(); ++i)
455 (*i)->definition = func.definition;
456 (*i)->body.body.clear();
459 decls.push_back(&func);
462 void ProgramCompiler::DeclarationCombiner::visit(VariableDeclaration &var)
464 VariableDeclaration *&ptr = variables[var.name];
467 if(var.init_expression)
468 ptr->init_expression = var.init_expression;
476 ProgramCompiler::VariableResolver::VariableResolver():
478 record_target(false),
479 assignment_target(0),
480 self_referencing(false)
483 void ProgramCompiler::VariableResolver::apply(Stage &s)
485 SetForScope<Stage *> set(stage, &s);
486 Stage *builtins = get_builtins(stage->type);
488 blocks.push_back(&builtins->content);
489 stage->content.visit(*this);
494 void ProgramCompiler::VariableResolver::visit(Block &block)
496 blocks.push_back(&block);
497 block.variables.clear();
498 TraversingVisitor::visit(block);
502 void ProgramCompiler::VariableResolver::visit(VariableReference &var)
506 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
509 map<string, VariableDeclaration *>::iterator j = (*i)->variables.find(var.name);
510 if(j!=(*i)->variables.end())
512 var.declaration = j->second;
513 type = j->second->type_declaration;
520 if(assignment_target)
522 record_target = false;
523 assignment_target = 0;
526 assignment_target = var.declaration;
528 else if(var.declaration && var.declaration==assignment_target)
529 self_referencing = true;
532 void ProgramCompiler::VariableResolver::visit(MemberAccess &memacc)
535 TraversingVisitor::visit(memacc);
536 memacc.declaration = 0;
539 map<string, VariableDeclaration *>::iterator i = type->members.variables.find(memacc.member);
540 if(i!=type->members.variables.end())
542 memacc.declaration = i->second;
543 type = i->second->type_declaration;
550 void ProgramCompiler::VariableResolver::visit(BinaryExpression &binary)
555 SetForScope<bool> set(record_target, false);
556 binary.right->visit(*this);
559 binary.left->visit(*this);
563 TraversingVisitor::visit(binary);
568 void ProgramCompiler::VariableResolver::visit(Assignment &assign)
571 SetFlag set(record_target);
572 assignment_target = 0;
573 assign.left->visit(*this);
576 self_referencing = false;
577 assign.right->visit(*this);
579 assign.self_referencing = (self_referencing || assign.oper!="=");
580 assign.target_declaration = assignment_target;
583 void ProgramCompiler::VariableResolver::visit(StructDeclaration &strct)
585 TraversingVisitor::visit(strct);
586 blocks.back()->types[strct.name] = &strct;
589 void ProgramCompiler::VariableResolver::visit(VariableDeclaration &var)
591 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
594 map<string, StructDeclaration *>::iterator j = (*i)->types.find(var.type);
595 if(j!=(*i)->types.end())
596 var.type_declaration = j->second;
599 if(!block_interface.empty() && var.interface.empty())
600 var.interface = block_interface;
602 TraversingVisitor::visit(var);
603 blocks.back()->variables[var.name] = &var;
604 if(anonymous && blocks.size()>1)
605 blocks[blocks.size()-2]->variables[var.name] = &var;
608 void ProgramCompiler::VariableResolver::visit(InterfaceBlock &iface)
610 SetFlag set(anonymous);
611 SetForScope<string> set2(block_interface, iface.interface);
612 TraversingVisitor::visit(iface);
616 ProgramCompiler::InterfaceGenerator::InterfaceGenerator():
621 string ProgramCompiler::InterfaceGenerator::get_out_prefix(StageType type)
625 else if(type==GEOMETRY)
631 void ProgramCompiler::InterfaceGenerator::apply(Stage &s)
633 SetForScope<Stage *> set(stage, &s);
635 in_prefix = get_out_prefix(stage->previous->type);
636 out_prefix = get_out_prefix(stage->type);
637 stage->content.visit(*this);
640 void ProgramCompiler::InterfaceGenerator::visit(Block &block)
642 SetForScope<unsigned> set(scope_level, scope_level+1);
643 for(list<NodePtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
649 for(map<string, VariableDeclaration *>::iterator j=iface_declarations.begin(); j!=iface_declarations.end(); ++j)
651 list<NodePtr<Node> >::iterator k = block.body.insert(i, j->second);
654 iface_declarations.clear();
657 for(list<Node *>::iterator j=insert_nodes.begin(); j!=insert_nodes.end(); ++j)
658 block.body.insert(i, *j);
659 insert_nodes.clear();
662 block.body.erase(i++);
669 string ProgramCompiler::InterfaceGenerator::change_prefix(const string &name, const string &prefix) const
671 unsigned offset = (name.compare(0, in_prefix.size(), in_prefix) ? 0 : in_prefix.size());
672 return prefix+name.substr(offset);
675 bool ProgramCompiler::InterfaceGenerator::generate_interface(VariableDeclaration &var, const string &iface, const string &name)
677 const map<string, VariableDeclaration *> &stage_vars = (iface=="in" ? stage->in_variables : stage->out_variables);
678 if(stage_vars.count(name) || iface_declarations.count(name))
681 VariableDeclaration* iface_var = new VariableDeclaration;
682 iface_var->sampling = var.sampling;
683 iface_var->interface = iface;
684 iface_var->type = var.type;
685 iface_var->type_declaration = var.type_declaration;
686 iface_var->name = name;
687 if(stage->type==GEOMETRY)
688 iface_var->array = ((var.array && var.interface!="in") || iface=="in");
690 iface_var->array = var.array;
692 iface_var->array_size = var.array_size;
694 iface_var->linked_declaration = &var;
695 iface_declarations[name] = iface_var;
700 void ProgramCompiler::InterfaceGenerator::insert_assignment(const string &left, ProgramSyntax::Expression *right)
702 Assignment *assign = new Assignment;
703 VariableReference *ref = new VariableReference;
707 assign->right = right;
709 ExpressionStatement *stmt = new ExpressionStatement;
710 stmt->expression = assign;
711 insert_nodes.push_back(stmt);
714 void ProgramCompiler::InterfaceGenerator::visit(VariableReference &var)
716 if(var.declaration || !stage->previous)
718 if(iface_declarations.count(var.name))
721 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
722 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
723 if(i==prev_out.end())
724 i = prev_out.find(in_prefix+var.name);
725 if(i!=prev_out.end())
726 generate_interface(*i->second, "in", var.name);
729 void ProgramCompiler::InterfaceGenerator::visit(VariableDeclaration &var)
731 if(var.interface=="out")
734 stage->out_variables[var.name] = &var;
735 else if(generate_interface(var, "out", change_prefix(var.name, string())))
738 if(var.init_expression)
739 insert_assignment(var.name, var.init_expression->clone());
742 else if(var.interface=="in")
744 stage->in_variables[var.name] = &var;
745 if(var.linked_declaration)
746 var.linked_declaration->linked_declaration = &var;
747 else if(stage->previous)
749 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
750 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
751 if(i!=prev_out.end())
753 var.linked_declaration = i->second;
754 i->second->linked_declaration = &var;
759 TraversingVisitor::visit(var);
762 void ProgramCompiler::InterfaceGenerator::visit(Passthrough &pass)
764 vector<VariableDeclaration *> pass_vars;
766 for(map<string, VariableDeclaration *>::const_iterator i=stage->in_variables.begin(); i!=stage->in_variables.end(); ++i)
767 pass_vars.push_back(i->second);
768 for(map<string, VariableDeclaration *>::const_iterator i=iface_declarations.begin(); i!=iface_declarations.end(); ++i)
769 if(i->second->interface=="in")
770 pass_vars.push_back(i->second);
774 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
775 for(map<string, VariableDeclaration *>::const_iterator i=prev_out.begin(); i!=prev_out.end(); ++i)
778 for(vector<VariableDeclaration *>::const_iterator j=pass_vars.begin(); (!linked && j!=pass_vars.end()); ++j)
779 linked = ((*j)->linked_declaration==i->second);
781 if(!linked && generate_interface(*i->second, "in", i->second->name))
782 pass_vars.push_back(i->second);
786 if(stage->type==GEOMETRY)
788 VariableReference *ref = new VariableReference;
791 BinaryExpression *subscript = new BinaryExpression;
792 subscript->left = ref;
793 subscript->oper = "[";
794 subscript->right = pass.subscript;
795 subscript->after = "]";
797 MemberAccess *memacc = new MemberAccess;
798 memacc->left = subscript;
799 memacc->member = "gl_Position";
801 insert_assignment("gl_Position", memacc);
804 for(vector<VariableDeclaration *>::const_iterator i=pass_vars.begin(); i!=pass_vars.end(); ++i)
806 string out_name = change_prefix((*i)->name, out_prefix);
807 generate_interface(**i, "out", out_name);
809 VariableReference *ref = new VariableReference;
810 ref->name = (*i)->name;
813 BinaryExpression *subscript = new BinaryExpression;
814 subscript->left = ref;
815 subscript->oper = "[";
816 subscript->right = pass.subscript;
817 subscript->after = "]";
818 insert_assignment(out_name, subscript);
821 insert_assignment(out_name, ref);
828 void ProgramCompiler::VariableRenamer::visit(VariableReference &var)
831 var.name = var.declaration->name;
834 void ProgramCompiler::VariableRenamer::visit(VariableDeclaration &var)
836 if(var.linked_declaration)
837 var.name = var.linked_declaration->name;
838 TraversingVisitor::visit(var);
842 ProgramCompiler::UnusedVariableLocator::UnusedVariableLocator():
845 assignment_target(false)
848 void ProgramCompiler::UnusedVariableLocator::apply(Stage &s)
850 assignments.push_back(BlockAssignmentMap());
852 assignments.pop_back();
855 void ProgramCompiler::UnusedVariableLocator::visit(VariableReference &var)
857 unused_nodes.erase(var.declaration);
859 map<VariableDeclaration *, Node *>::iterator i = aggregates.find(var.declaration);
860 if(i!=aggregates.end())
861 unused_nodes.erase(i->second);
863 if(assignment_target)
866 for(vector<BlockAssignmentMap>::iterator j=assignments.end(); j!=assignments.begin(); )
869 BlockAssignmentMap::iterator k = j->find(var.declaration);
872 for(vector<Node *>::iterator l=k->second.nodes.begin(); l!=k->second.nodes.end(); ++l)
873 unused_nodes.erase(*l);
880 void ProgramCompiler::UnusedVariableLocator::visit(MemberAccess &memacc)
882 TraversingVisitor::visit(memacc);
883 unused_nodes.erase(memacc.declaration);
886 void ProgramCompiler::UnusedVariableLocator::visit(BinaryExpression &binary)
890 binary.left->visit(*this);
891 SetForScope<bool> set(assignment_target, false);
892 binary.right->visit(*this);
895 TraversingVisitor::visit(binary);
898 void ProgramCompiler::UnusedVariableLocator::visit(Assignment &assign)
901 SetForScope<bool> set(assignment_target, !assign.self_referencing);
902 assign.left->visit(*this);
904 assign.right->visit(*this);
905 assignment = &assign;
908 void ProgramCompiler::UnusedVariableLocator::record_assignment(VariableDeclaration &var, Node &node, bool self_ref)
910 unused_nodes.insert(&node);
911 BlockAssignmentMap &block_assignments = assignments.back();
912 AssignmentList &var_assignments = block_assignments[&var];
914 var_assignments.nodes.clear();
915 var_assignments.nodes.push_back(&node);
916 var_assignments.conditional = false;
917 var_assignments.self_referencing = self_ref;
920 void ProgramCompiler::UnusedVariableLocator::visit(ExpressionStatement &expr)
923 TraversingVisitor::visit(expr);
924 if(assignment && assignment->target_declaration)
925 record_assignment(*assignment->target_declaration, expr, assignment->self_referencing);
928 void ProgramCompiler::UnusedVariableLocator::visit(StructDeclaration &strct)
930 SetForScope<Node *> set(aggregate, &strct);
931 unused_nodes.insert(&strct);
932 TraversingVisitor::visit(strct);
935 void ProgramCompiler::UnusedVariableLocator::visit(VariableDeclaration &var)
938 aggregates[&var] = aggregate;
941 unused_nodes.insert(&var);
942 if(var.init_expression)
943 record_assignment(var, *var.init_expression, false);
945 unused_nodes.erase(var.type_declaration);
946 TraversingVisitor::visit(var);
949 void ProgramCompiler::UnusedVariableLocator::visit(InterfaceBlock &iface)
951 SetForScope<Node *> set(aggregate, &iface);
952 unused_nodes.insert(&iface);
953 TraversingVisitor::visit(iface);
956 void ProgramCompiler::UnusedVariableLocator::visit(FunctionDeclaration &func)
958 assignments.push_back(BlockAssignmentMap());
960 for(vector<NodePtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
962 func.body.visit(*this);
964 BlockAssignmentMap &block_assignments = assignments.back();
965 for(map<string, VariableDeclaration *>::iterator i=func.body.variables.begin(); i!=func.body.variables.end(); ++i)
966 block_assignments.erase(i->second);
967 for(BlockAssignmentMap::iterator i=block_assignments.begin(); i!=block_assignments.end(); ++i)
969 if(i->first->interface=="out" && stage->type!=FRAGMENT && !i->first->linked_declaration)
972 for(vector<Node *>::iterator j=i->second.nodes.begin(); j!=i->second.nodes.end(); ++j)
973 unused_nodes.erase(*j);
976 assignments.pop_back();
979 void ProgramCompiler::UnusedVariableLocator::merge_down_assignments()
981 BlockAssignmentMap &parent_assignments = assignments[assignments.size()-2];
982 BlockAssignmentMap &block_assignments = assignments.back();
983 for(BlockAssignmentMap::iterator i=block_assignments.begin(); i!=block_assignments.end(); ++i)
985 BlockAssignmentMap::iterator j = parent_assignments.find(i->first);
986 if(j==parent_assignments.end())
987 parent_assignments.insert(*i);
988 else if(i->second.self_referencing || i->second.conditional)
990 j->second.nodes.insert(j->second.nodes.end(), i->second.nodes.begin(), i->second.nodes.end());
991 j->second.conditional |= i->second.conditional;
992 j->second.self_referencing |= i->second.self_referencing;
995 j->second = i->second;
997 assignments.pop_back();
1000 void ProgramCompiler::UnusedVariableLocator::visit(Conditional &cond)
1002 cond.condition->visit(*this);
1003 assignments.push_back(BlockAssignmentMap());
1004 cond.body.visit(*this);
1006 BlockAssignmentMap if_assignments;
1007 swap(assignments.back(), if_assignments);
1008 cond.else_body.visit(*this);
1010 BlockAssignmentMap &else_assignments = assignments.back();
1011 for(BlockAssignmentMap::iterator i=else_assignments.begin(); i!=else_assignments.end(); ++i)
1013 BlockAssignmentMap::iterator j = if_assignments.find(i->first);
1014 if(j!=if_assignments.end())
1016 i->second.nodes.insert(i->second.nodes.end(), j->second.nodes.begin(), j->second.nodes.end());
1017 i->second.conditional |= j->second.conditional;
1018 i->second.self_referencing |= j->second.self_referencing;
1019 if_assignments.erase(j);
1022 i->second.conditional = true;
1025 for(BlockAssignmentMap::iterator i=if_assignments.begin(); i!=if_assignments.end(); ++i)
1027 i->second.conditional = true;
1028 else_assignments.insert(*i);
1031 merge_down_assignments();
1034 void ProgramCompiler::UnusedVariableLocator::visit(Iteration &iter)
1036 assignments.push_back(BlockAssignmentMap());
1037 TraversingVisitor::visit(iter);
1038 merge_down_assignments();
1042 ProgramCompiler::NodeRemover::NodeRemover(const set<Node *> &r):
1046 void ProgramCompiler::NodeRemover::visit(Block &block)
1048 for(list<NodePtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
1051 if(to_remove.count(&**i))
1052 block.body.erase(i++);
1058 void ProgramCompiler::NodeRemover::visit(VariableDeclaration &var)
1060 if(to_remove.count(&var))
1062 stage->in_variables.erase(var.name);
1063 stage->out_variables.erase(var.name);
1064 if(var.linked_declaration)
1065 var.linked_declaration->linked_declaration = 0;
1067 else if(var.init_expression && to_remove.count(&*var.init_expression))
1068 var.init_expression = 0;