1 #include <msp/core/raii.h>
2 #include <msp/strings/format.h>
3 #include <msp/strings/utils.h>
6 #include "programcompiler.h"
13 const char builtins_src[] =
15 "out gl_PerVertex {\n"
16 " vec4 gl_Position;\n"
17 " float gl_ClipDistance[];\n"
21 " vec4 gl_Position;\n"
22 " float gl_ClipDistance[];\n"
24 "out gl_PerVertex {\n"
25 " vec4 gl_Position;\n"
26 " float gl_ClipDistance[];\n"
34 using namespace ProgramSyntax;
36 ProgramCompiler::ProgramCompiler():
40 void ProgramCompiler::compile(const string &source)
42 module = &parser.parse(source);
46 void ProgramCompiler::compile(IO::Base &io)
48 module = &parser.parse(io);
52 void ProgramCompiler::add_shaders(Program &program)
55 throw invalid_operation("ProgramCompiler::add_shaders");
57 string head = "#version 150\n";
58 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
61 program.attach_shader_owned(new VertexShader(head+create_source(*i)));
62 else if(i->type==GEOMETRY)
63 program.attach_shader_owned(new GeometryShader(head+create_source(*i)));
64 else if(i->type==FRAGMENT)
65 program.attach_shader_owned(new FragmentShader(head+create_source(*i)));
68 program.bind_attribute(VERTEX4, "vertex");
69 program.bind_attribute(NORMAL3, "normal");
70 program.bind_attribute(COLOR4_FLOAT, "color");
71 program.bind_attribute(TEXCOORD4, "texcoord");
74 Module *ProgramCompiler::create_builtins_module()
77 Module *module = new Module(parser.parse(builtins_src));
78 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
80 VariableResolver resolver;
81 i->content.visit(resolver);
82 for(map<string, VariableDeclaration *>::iterator j=i->content.variables.begin(); j!=i->content.variables.end(); ++j)
83 j->second->linked_declaration = j->second;
88 Module &ProgramCompiler::get_builtins_module()
90 static RefPtr<Module> builtins_module = create_builtins_module();
91 return *builtins_module;
94 Stage *ProgramCompiler::get_builtins(StageType type)
96 Module &module = get_builtins_module();
97 for(list<Stage>::iterator i=module.stages.begin(); i!=module.stages.end(); ++i)
103 void ProgramCompiler::process()
105 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
107 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); )
110 i = module->stages.begin();
116 void ProgramCompiler::generate(Stage &stage)
118 inject_block(stage.content, module->shared.content);
120 apply<VariableResolver>(stage);
121 apply<InterfaceGenerator>(stage);
122 apply<VariableResolver>(stage);
123 apply<VariableRenamer>(stage);
126 bool ProgramCompiler::optimize(Stage &stage)
128 UnusedVariableLocator unused_locator;
129 unused_locator.apply(stage);
132 remover.to_remove = unused_locator.unused_nodes;
133 remover.apply(stage);
135 return !unused_locator.unused_nodes.empty();
138 void ProgramCompiler::inject_block(Block &target, const Block &source)
140 list<NodePtr<Node> >::iterator insert_point = target.body.begin();
141 for(list<NodePtr<Node> >::const_iterator i=source.body.begin(); i!=source.body.end(); ++i)
142 target.body.insert(insert_point, (*i)->clone());
146 void ProgramCompiler::apply(Stage &stage)
149 visitor.apply(stage);
152 string ProgramCompiler::create_source(Stage &stage)
155 formatter.apply(stage);
156 return formatter.formatted;
160 ProgramCompiler::Visitor::Visitor():
164 void ProgramCompiler::Visitor::apply(Stage &s)
166 SetForScope<Stage *> set(stage, &s);
167 stage->content.visit(*this);
171 ProgramCompiler::Formatter::Formatter():
173 parameter_list(false),
177 void ProgramCompiler::Formatter::visit(Literal &literal)
179 formatted += literal.token;
182 void ProgramCompiler::Formatter::visit(ParenthesizedExpression &parexpr)
185 parexpr.expression->visit(*this);
189 void ProgramCompiler::Formatter::visit(VariableReference &var)
191 formatted += var.name;
194 void ProgramCompiler::Formatter::visit(MemberAccess &memacc)
196 memacc.left->visit(*this);
197 formatted += format(".%s", memacc.member);
200 void ProgramCompiler::Formatter::visit(UnaryExpression &unary)
203 formatted += unary.oper;
204 unary.expression->visit(*this);
206 formatted += unary.oper;
209 void ProgramCompiler::Formatter::visit(BinaryExpression &binary)
211 binary.left->visit(*this);
212 formatted += binary.oper;
213 binary.right->visit(*this);
214 formatted += binary.after;
217 void ProgramCompiler::Formatter::visit(Assignment &assign)
219 assign.left->visit(*this);
220 formatted += format(" %s ", assign.oper);
221 assign.right->visit(*this);
224 void ProgramCompiler::Formatter::visit(FunctionCall &call)
226 formatted += format("%s(", call.name);
227 for(vector<NodePtr<Expression> >::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
229 if(i!=call.arguments.begin())
236 void ProgramCompiler::Formatter::visit(ExpressionStatement &expr)
238 expr.expression->visit(*this);
242 void ProgramCompiler::Formatter::visit(Block &block)
247 unsigned brace_indent = indent;
248 bool use_braces = (block.use_braces || (indent && block.body.size()!=1));
250 formatted += format("%s{\n", string(brace_indent*2, ' '));
252 SetForScope<unsigned> set(indent, indent+!formatted.empty());
253 string spaces(indent*2, ' ');
254 for(list<NodePtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); ++i)
256 if(i!=block.body.begin())
264 formatted += format("\n%s}", string(brace_indent*2, ' '));
267 void ProgramCompiler::Formatter::visit(Layout &layout)
269 formatted += "layout(";
270 for(vector<Layout::Qualifier>::const_iterator i=layout.qualifiers.begin(); i!=layout.qualifiers.end(); ++i)
272 if(i!=layout.qualifiers.begin())
274 formatted += i->identifier;
275 if(!i->value.empty())
276 formatted += format("=%s", i->value);
278 formatted += format(") %s;", layout.interface);
281 void ProgramCompiler::Formatter::visit(StructDeclaration &strct)
283 formatted += format("struct %s\n", strct.name);
284 strct.members.visit(*this);
288 void ProgramCompiler::Formatter::visit(VariableDeclaration &var)
291 formatted += "const ";
292 if(!var.sampling.empty())
293 formatted += format("%s ", var.sampling);
294 if(!var.interface.empty() && var.interface!=block_interface)
295 formatted += format("%s ", var.interface);
296 formatted += format("%s %s", var.type, var.name);
301 var.array_size->visit(*this);
304 if(var.init_expression)
307 var.init_expression->visit(*this);
313 void ProgramCompiler::Formatter::visit(InterfaceBlock &iface)
315 SetForScope<string> set(block_interface, iface.interface);
316 formatted += format("%s %s\n", iface.interface, iface.name);
317 iface.members.visit(*this);
321 void ProgramCompiler::Formatter::visit(FunctionDeclaration &func)
323 formatted += format("%s %s(", func.return_type, func.name);
324 for(vector<NodePtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
326 if(i!=func.parameters.begin())
328 SetFlag set(parameter_list);
335 func.body.visit(*this);
341 void ProgramCompiler::Formatter::visit(Conditional &cond)
344 formatted.replace(formatted.rfind('\n'), string::npos, 1, ' ');
349 cond.condition->visit(*this);
352 cond.body.visit(*this);
353 if(!cond.else_body.body.empty())
355 formatted += format("\n%selse\n", string(indent*2, ' '));
356 SetForScope<unsigned> set(else_if, 2);
357 cond.else_body.visit(*this);
361 void ProgramCompiler::Formatter::visit(Iteration &iter)
364 iter.init_statement->visit(*this);
366 iter.condition->visit(*this);
368 iter.loop_expression->visit(*this);
370 iter.body.visit(*this);
373 void ProgramCompiler::Formatter::visit(Return &ret)
375 formatted += "return ";
376 ret.expression->visit(*this);
381 ProgramCompiler::VariableResolver::VariableResolver():
383 record_target(false),
384 assignment_target(0),
385 self_referencing(false)
388 void ProgramCompiler::VariableResolver::apply(Stage &s)
390 SetForScope<Stage *> set(stage, &s);
391 Stage *builtins = get_builtins(stage->type);
393 blocks.push_back(&builtins->content);
394 stage->content.visit(*this);
399 void ProgramCompiler::VariableResolver::visit(Block &block)
401 blocks.push_back(&block);
402 block.variables.clear();
403 TraversingVisitor::visit(block);
407 void ProgramCompiler::VariableResolver::visit(VariableReference &var)
411 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
414 map<string, VariableDeclaration *>::iterator j = (*i)->variables.find(var.name);
415 if(j!=(*i)->variables.end())
417 var.declaration = j->second;
418 type = j->second->type_declaration;
425 if(assignment_target)
427 record_target = false;
428 assignment_target = 0;
431 assignment_target = var.declaration;
433 else if(var.declaration && var.declaration==assignment_target)
434 self_referencing = true;
437 void ProgramCompiler::VariableResolver::visit(MemberAccess &memacc)
440 TraversingVisitor::visit(memacc);
441 memacc.declaration = 0;
444 map<string, VariableDeclaration *>::iterator i = type->members.variables.find(memacc.member);
445 if(i!=type->members.variables.end())
447 memacc.declaration = i->second;
448 type = i->second->type_declaration;
455 void ProgramCompiler::VariableResolver::visit(BinaryExpression &binary)
460 SetForScope<bool> set(record_target, false);
461 binary.right->visit(*this);
464 binary.left->visit(*this);
468 TraversingVisitor::visit(binary);
473 void ProgramCompiler::VariableResolver::visit(Assignment &assign)
476 SetFlag set(record_target);
477 assignment_target = 0;
478 assign.left->visit(*this);
481 self_referencing = false;
482 assign.right->visit(*this);
484 assign.self_referencing = (self_referencing || assign.oper!="=");
485 assign.target_declaration = assignment_target;
488 void ProgramCompiler::VariableResolver::visit(StructDeclaration &strct)
490 TraversingVisitor::visit(strct);
491 blocks.back()->types[strct.name] = &strct;
494 void ProgramCompiler::VariableResolver::visit(VariableDeclaration &var)
496 for(vector<Block *>::iterator i=blocks.end(); i!=blocks.begin(); )
499 map<string, StructDeclaration *>::iterator j = (*i)->types.find(var.type);
500 if(j!=(*i)->types.end())
501 var.type_declaration = j->second;
504 if(!block_interface.empty() && var.interface.empty())
505 var.interface = block_interface;
507 TraversingVisitor::visit(var);
508 blocks.back()->variables[var.name] = &var;
509 if(anonymous && blocks.size()>1)
510 blocks[blocks.size()-2]->variables[var.name] = &var;
513 void ProgramCompiler::VariableResolver::visit(InterfaceBlock &iface)
515 SetFlag set(anonymous);
516 SetForScope<string> set2(block_interface, iface.interface);
517 TraversingVisitor::visit(iface);
521 ProgramCompiler::InterfaceGenerator::InterfaceGenerator():
526 string ProgramCompiler::InterfaceGenerator::get_out_prefix(StageType type)
530 else if(type==GEOMETRY)
536 void ProgramCompiler::InterfaceGenerator::apply(Stage &s)
538 SetForScope<Stage *> set(stage, &s);
540 in_prefix = get_out_prefix(stage->previous->type);
541 out_prefix = get_out_prefix(stage->type);
542 stage->content.visit(*this);
545 void ProgramCompiler::InterfaceGenerator::visit(Block &block)
547 SetForScope<unsigned> set(scope_level, scope_level+1);
548 for(list<NodePtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
554 for(map<string, VariableDeclaration *>::iterator j=iface_declarations.begin(); j!=iface_declarations.end(); ++j)
556 list<NodePtr<Node> >::iterator k = block.body.insert(i, j->second);
559 iface_declarations.clear();
562 for(list<Node *>::iterator j=insert_nodes.begin(); j!=insert_nodes.end(); ++j)
563 block.body.insert(i, *j);
564 insert_nodes.clear();
567 block.body.erase(i++);
574 string ProgramCompiler::InterfaceGenerator::change_prefix(const string &name, const string &prefix) const
576 unsigned offset = (name.compare(0, in_prefix.size(), in_prefix) ? 0 : in_prefix.size());
577 return prefix+name.substr(offset);
580 bool ProgramCompiler::InterfaceGenerator::generate_interface(VariableDeclaration &var, const string &iface, const string &name)
582 const map<string, VariableDeclaration *> &stage_vars = (iface=="in" ? stage->in_variables : stage->out_variables);
583 if(stage_vars.count(name) || iface_declarations.count(name))
586 VariableDeclaration* iface_var = new VariableDeclaration;
587 iface_var->sampling = var.sampling;
588 iface_var->interface = iface;
589 iface_var->type = var.type;
590 iface_var->type_declaration = var.type_declaration;
591 iface_var->name = name;
592 if(stage->type==GEOMETRY)
593 iface_var->array = ((var.array && var.interface!="in") || iface=="in");
595 iface_var->array = var.array;
597 iface_var->array_size = var.array_size;
599 iface_var->linked_declaration = &var;
600 iface_declarations[name] = iface_var;
605 void ProgramCompiler::InterfaceGenerator::insert_assignment(const string &left, ProgramSyntax::Expression *right)
607 Assignment *assign = new Assignment;
608 VariableReference *ref = new VariableReference;
612 assign->right = right;
614 ExpressionStatement *stmt = new ExpressionStatement;
615 stmt->expression = assign;
616 insert_nodes.push_back(stmt);
619 void ProgramCompiler::InterfaceGenerator::visit(VariableReference &var)
621 if(var.declaration || !stage->previous)
623 if(iface_declarations.count(var.name))
626 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
627 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
628 if(i==prev_out.end())
629 i = prev_out.find(in_prefix+var.name);
630 if(i!=prev_out.end())
631 generate_interface(*i->second, "in", var.name);
634 void ProgramCompiler::InterfaceGenerator::visit(VariableDeclaration &var)
636 if(var.interface=="out")
639 stage->out_variables[var.name] = &var;
640 else if(generate_interface(var, "out", change_prefix(var.name, string())))
643 if(var.init_expression)
644 insert_assignment(var.name, var.init_expression->clone());
647 else if(var.interface=="in")
649 stage->in_variables[var.name] = &var;
650 if(var.linked_declaration)
651 var.linked_declaration->linked_declaration = &var;
652 else if(stage->previous)
654 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
655 map<string, VariableDeclaration *>::const_iterator i = prev_out.find(var.name);
656 if(i!=prev_out.end())
658 var.linked_declaration = i->second;
659 i->second->linked_declaration = &var;
664 TraversingVisitor::visit(var);
667 void ProgramCompiler::InterfaceGenerator::visit(Passthrough &pass)
669 vector<VariableDeclaration *> pass_vars;
671 for(map<string, VariableDeclaration *>::const_iterator i=stage->in_variables.begin(); i!=stage->in_variables.end(); ++i)
672 pass_vars.push_back(i->second);
673 for(map<string, VariableDeclaration *>::const_iterator i=iface_declarations.begin(); i!=iface_declarations.end(); ++i)
674 if(i->second->interface=="in")
675 pass_vars.push_back(i->second);
679 const map<string, VariableDeclaration *> &prev_out = stage->previous->out_variables;
680 for(map<string, VariableDeclaration *>::const_iterator i=prev_out.begin(); i!=prev_out.end(); ++i)
683 for(vector<VariableDeclaration *>::const_iterator j=pass_vars.begin(); (!linked && j!=pass_vars.end()); ++j)
684 linked = ((*j)->linked_declaration==i->second);
686 if(!linked && generate_interface(*i->second, "in", i->second->name))
687 pass_vars.push_back(i->second);
691 if(stage->type==GEOMETRY)
693 VariableReference *ref = new VariableReference;
696 BinaryExpression *subscript = new BinaryExpression;
697 subscript->left = ref;
698 subscript->oper = "[";
699 subscript->right = pass.subscript;
700 subscript->after = "]";
702 MemberAccess *memacc = new MemberAccess;
703 memacc->left = subscript;
704 memacc->member = "gl_Position";
706 insert_assignment("gl_Position", memacc);
709 for(vector<VariableDeclaration *>::const_iterator i=pass_vars.begin(); i!=pass_vars.end(); ++i)
711 string out_name = change_prefix((*i)->name, out_prefix);
712 generate_interface(**i, "out", out_name);
714 VariableReference *ref = new VariableReference;
715 ref->name = (*i)->name;
718 BinaryExpression *subscript = new BinaryExpression;
719 subscript->left = ref;
720 subscript->oper = "[";
721 subscript->right = pass.subscript;
722 subscript->after = "]";
723 insert_assignment(out_name, subscript);
726 insert_assignment(out_name, ref);
733 void ProgramCompiler::VariableRenamer::visit(VariableReference &var)
736 var.name = var.declaration->name;
739 void ProgramCompiler::VariableRenamer::visit(VariableDeclaration &var)
741 if(var.linked_declaration)
742 var.name = var.linked_declaration->name;
743 TraversingVisitor::visit(var);
747 ProgramCompiler::UnusedVariableLocator::UnusedVariableLocator():
750 assignment_target(false)
753 void ProgramCompiler::UnusedVariableLocator::apply(Stage &s)
755 assignments.push_back(BlockAssignmentMap());
757 assignments.pop_back();
760 void ProgramCompiler::UnusedVariableLocator::visit(VariableReference &var)
762 unused_nodes.erase(var.declaration);
764 map<VariableDeclaration *, Node *>::iterator i = aggregates.find(var.declaration);
765 if(i!=aggregates.end())
766 unused_nodes.erase(i->second);
768 if(assignment_target)
771 for(vector<BlockAssignmentMap>::iterator j=assignments.end(); j!=assignments.begin(); )
774 BlockAssignmentMap::iterator k = j->find(var.declaration);
777 for(vector<Node *>::iterator l=k->second.nodes.begin(); l!=k->second.nodes.end(); ++l)
778 unused_nodes.erase(*l);
785 void ProgramCompiler::UnusedVariableLocator::visit(MemberAccess &memacc)
787 TraversingVisitor::visit(memacc);
788 unused_nodes.erase(memacc.declaration);
791 void ProgramCompiler::UnusedVariableLocator::visit(BinaryExpression &binary)
795 binary.left->visit(*this);
796 SetForScope<bool> set(assignment_target, false);
797 binary.right->visit(*this);
800 TraversingVisitor::visit(binary);
803 void ProgramCompiler::UnusedVariableLocator::visit(Assignment &assign)
806 SetForScope<bool> set(assignment_target, !assign.self_referencing);
807 assign.left->visit(*this);
809 assign.right->visit(*this);
810 assignment = &assign;
813 void ProgramCompiler::UnusedVariableLocator::record_assignment(VariableDeclaration &var, Node &node, bool self_ref)
815 unused_nodes.insert(&node);
816 BlockAssignmentMap &block_assignments = assignments.back();
817 AssignmentList &var_assignments = block_assignments[&var];
819 var_assignments.nodes.clear();
820 var_assignments.nodes.push_back(&node);
821 var_assignments.conditional = false;
822 var_assignments.self_referencing = self_ref;
825 void ProgramCompiler::UnusedVariableLocator::visit(ExpressionStatement &expr)
828 TraversingVisitor::visit(expr);
829 if(assignment && assignment->target_declaration)
830 record_assignment(*assignment->target_declaration, expr, assignment->self_referencing);
833 void ProgramCompiler::UnusedVariableLocator::visit(StructDeclaration &strct)
835 SetForScope<Node *> set(aggregate, &strct);
836 unused_nodes.insert(&strct);
837 TraversingVisitor::visit(strct);
840 void ProgramCompiler::UnusedVariableLocator::visit(VariableDeclaration &var)
843 aggregates[&var] = aggregate;
846 unused_nodes.insert(&var);
847 if(var.init_expression)
848 record_assignment(var, *var.init_expression, false);
850 unused_nodes.erase(var.type_declaration);
851 TraversingVisitor::visit(var);
854 void ProgramCompiler::UnusedVariableLocator::visit(InterfaceBlock &iface)
856 SetForScope<Node *> set(aggregate, &iface);
857 unused_nodes.insert(&iface);
858 TraversingVisitor::visit(iface);
861 void ProgramCompiler::UnusedVariableLocator::visit(FunctionDeclaration &func)
863 assignments.push_back(BlockAssignmentMap());
865 for(vector<NodePtr<VariableDeclaration> >::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
867 func.body.visit(*this);
869 BlockAssignmentMap &block_assignments = assignments.back();
870 for(map<string, VariableDeclaration *>::iterator i=func.body.variables.begin(); i!=func.body.variables.end(); ++i)
871 block_assignments.erase(i->second);
872 for(BlockAssignmentMap::iterator i=block_assignments.begin(); i!=block_assignments.end(); ++i)
874 if(i->first->interface=="out" && stage->type!=FRAGMENT && !i->first->linked_declaration)
877 for(vector<Node *>::iterator j=i->second.nodes.begin(); j!=i->second.nodes.end(); ++j)
878 unused_nodes.erase(*j);
881 assignments.pop_back();
884 void ProgramCompiler::UnusedVariableLocator::merge_down_assignments()
886 BlockAssignmentMap &parent_assignments = assignments[assignments.size()-2];
887 BlockAssignmentMap &block_assignments = assignments.back();
888 for(BlockAssignmentMap::iterator i=block_assignments.begin(); i!=block_assignments.end(); ++i)
890 BlockAssignmentMap::iterator j = parent_assignments.find(i->first);
891 if(j==parent_assignments.end())
892 parent_assignments.insert(*i);
893 else if(i->second.self_referencing || i->second.conditional)
895 j->second.nodes.insert(j->second.nodes.end(), i->second.nodes.begin(), i->second.nodes.end());
896 j->second.conditional |= i->second.conditional;
897 j->second.self_referencing |= i->second.self_referencing;
900 j->second = i->second;
902 assignments.pop_back();
905 void ProgramCompiler::UnusedVariableLocator::visit(Conditional &cond)
907 cond.condition->visit(*this);
908 assignments.push_back(BlockAssignmentMap());
909 cond.body.visit(*this);
911 BlockAssignmentMap if_assignments;
912 swap(assignments.back(), if_assignments);
913 cond.else_body.visit(*this);
915 BlockAssignmentMap &else_assignments = assignments.back();
916 for(BlockAssignmentMap::iterator i=else_assignments.begin(); i!=else_assignments.end(); ++i)
918 BlockAssignmentMap::iterator j = if_assignments.find(i->first);
919 if(j!=if_assignments.end())
921 i->second.nodes.insert(i->second.nodes.end(), j->second.nodes.begin(), j->second.nodes.end());
922 i->second.conditional |= j->second.conditional;
923 i->second.self_referencing |= j->second.self_referencing;
924 if_assignments.erase(j);
927 i->second.conditional = true;
930 for(BlockAssignmentMap::iterator i=if_assignments.begin(); i!=if_assignments.end(); ++i)
932 i->second.conditional = true;
933 else_assignments.insert(*i);
936 merge_down_assignments();
939 void ProgramCompiler::UnusedVariableLocator::visit(Iteration &iter)
941 assignments.push_back(BlockAssignmentMap());
942 TraversingVisitor::visit(iter);
943 merge_down_assignments();
947 void ProgramCompiler::NodeRemover::visit(Block &block)
949 for(list<NodePtr<Node> >::iterator i=block.body.begin(); i!=block.body.end(); )
952 if(to_remove.count(&**i))
953 block.body.erase(i++);
959 void ProgramCompiler::NodeRemover::visit(VariableDeclaration &var)
961 if(to_remove.count(&var))
963 stage->in_variables.erase(var.name);
964 stage->out_variables.erase(var.name);
965 if(var.linked_declaration)
966 var.linked_declaration->linked_declaration = 0;
968 else if(var.init_expression && to_remove.count(&*var.init_expression))
969 var.init_expression = 0;