Further reduce overhead of applying ProgramCompiler visitors

[libs/gl.git] / source / programcompiler.h

diff --git a/source/programcompiler.h b/source/programcompiler.h
index 9a825489df87e27178cfc0b0e775de0ff6b9ebbc..2ef4aa7d9b77c5f853968da6e4e9dbc310c9abec 100644 (file)
--- a/source/programcompiler.h
+++ b/source/programcompiler.h
@@ -1,6 +1,7 @@
 #ifndef MSP_GL_PROGRAMCOMPILER_H_
 #define MSP_GL_PROGRAMCOMPILER_H_
 
+#include <set>
 #include "programparser.h"
 #include "programsyntax.h"
 
@@ -11,18 +12,41 @@ class Program;
 
 class ProgramCompiler
 {
-public:
-       struct Formatter: ProgramSyntax::NodeVisitor
+private:
+       struct Visitor: ProgramSyntax::TraversingVisitor
        {
+               typedef void ResultType;
+
+               ProgramSyntax::Stage *stage;
+
+               Visitor();
+
+               virtual void apply(ProgramSyntax::Stage &);
+               void get_result() const { }
+       };
+
+       struct Formatter: Visitor
+       {
+               typedef std::string ResultType;
+
                std::string formatted;
                unsigned indent;
                bool parameter_list;
-               bool else_if;
+               unsigned else_if;
+               std::string block_interface;
 
                Formatter();
 
-               std::string format_expression(ProgramSyntax::Expression &);
+               const std::string &get_result() const { return formatted; }
                virtual void visit(ProgramSyntax::Block &);
+               virtual void visit(ProgramSyntax::Literal &);
+               virtual void visit(ProgramSyntax::ParenthesizedExpression &);
+               virtual void visit(ProgramSyntax::VariableReference &);
+               virtual void visit(ProgramSyntax::MemberAccess &);
+               virtual void visit(ProgramSyntax::UnaryExpression &);
+               virtual void visit(ProgramSyntax::BinaryExpression &);
+               virtual void visit(ProgramSyntax::Assignment &);
+               virtual void visit(ProgramSyntax::FunctionCall &);
                virtual void visit(ProgramSyntax::ExpressionStatement &);
                virtual void visit(ProgramSyntax::Layout &);
                virtual void visit(ProgramSyntax::StructDeclaration &);
@@ -34,7 +58,106 @@ public:
                virtual void visit(ProgramSyntax::Return &);
        };
 
-private:
+       struct VariableResolver: Visitor
+       {
+               std::vector<ProgramSyntax::Block *> blocks;
+               ProgramSyntax::StructDeclaration *type;
+               bool anonymous;
+               std::string block_interface;
+               bool record_target;
+               ProgramSyntax::VariableDeclaration *assignment_target;
+               bool self_referencing;
+
+               VariableResolver();
+
+               virtual void apply(ProgramSyntax::Stage &);
+               virtual void visit(ProgramSyntax::Block &);
+               virtual void visit(ProgramSyntax::VariableReference &);
+               virtual void visit(ProgramSyntax::MemberAccess &);
+               virtual void visit(ProgramSyntax::BinaryExpression &);
+               virtual void visit(ProgramSyntax::Assignment &);
+               virtual void visit(ProgramSyntax::StructDeclaration &);
+               virtual void visit(ProgramSyntax::VariableDeclaration &);
+               virtual void visit(ProgramSyntax::InterfaceBlock &);
+       };
+
+       struct InterfaceGenerator: Visitor
+       {
+               std::string in_prefix;
+               std::string out_prefix;
+               unsigned scope_level;
+               std::map<std::string, ProgramSyntax::VariableDeclaration *> iface_declarations;
+               bool remove_node;
+               std::list<ProgramSyntax::Node *> insert_nodes;
+
+               InterfaceGenerator();
+
+               static std::string get_out_prefix(ProgramSyntax::StageType);
+               virtual void apply(ProgramSyntax::Stage &);
+               virtual void visit(ProgramSyntax::Block &);
+               std::string change_prefix(const std::string &, const std::string &) const;
+               bool generate_interface(ProgramSyntax::VariableDeclaration &, const std::string &, const std::string &);
+               void insert_assignment(const std::string &, ProgramSyntax::Expression *);
+               virtual void visit(ProgramSyntax::VariableReference &);
+               virtual void visit(ProgramSyntax::VariableDeclaration &);
+               virtual void visit(ProgramSyntax::Passthrough &);
+       };
+
+       struct VariableRenamer: Visitor
+       {
+               virtual void visit(ProgramSyntax::VariableReference &);
+               virtual void visit(ProgramSyntax::VariableDeclaration &);
+       };
+
+       struct UnusedVariableLocator: Visitor
+       {
+               struct AssignmentList
+               {
+                       std::vector<ProgramSyntax::Node *> nodes;
+                       bool conditional;
+                       bool self_referencing;
+               };
+
+               typedef std::set<ProgramSyntax::Node *> ResultType;
+               typedef std::map<ProgramSyntax::VariableDeclaration *, AssignmentList> BlockAssignmentMap;
+
+               std::set<ProgramSyntax::Node *> unused_nodes;
+               std::map<ProgramSyntax::VariableDeclaration *, ProgramSyntax::Node *> aggregates;
+               ProgramSyntax::Node *aggregate;
+               std::vector<BlockAssignmentMap> assignments;
+               ProgramSyntax::Assignment *assignment;
+               bool assignment_target;
+
+               UnusedVariableLocator();
+
+               virtual void apply(ProgramSyntax::Stage &);
+               const ResultType &get_result() const { return unused_nodes; }
+               virtual void visit(ProgramSyntax::VariableReference &);
+               virtual void visit(ProgramSyntax::MemberAccess &);
+               virtual void visit(ProgramSyntax::BinaryExpression &);
+               virtual void visit(ProgramSyntax::Assignment &);
+               void record_assignment(ProgramSyntax::VariableDeclaration &, ProgramSyntax::Node &, bool);
+               virtual void visit(ProgramSyntax::ExpressionStatement &);
+               virtual void visit(ProgramSyntax::StructDeclaration &);
+               virtual void visit(ProgramSyntax::VariableDeclaration &);
+               virtual void visit(ProgramSyntax::InterfaceBlock &);
+               virtual void visit(ProgramSyntax::FunctionDeclaration &);
+               void merge_down_assignments();
+               virtual void visit(ProgramSyntax::Conditional &);
+               virtual void visit(ProgramSyntax::Iteration &);
+       };
+
+       struct NodeRemover: Visitor
+       {
+               std::set<ProgramSyntax::Node *> to_remove;
+
+               NodeRemover() { }
+               NodeRemover(const std::set<ProgramSyntax::Node *> &);
+
+               virtual void visit(ProgramSyntax::Block &);
+               virtual void visit(ProgramSyntax::VariableDeclaration &);
+       };
+
        ProgramParser parser;
        ProgramSyntax::Module *module;
 
@@ -46,7 +169,17 @@ public:
        void add_shaders(Program &);
 
 private:
-       std::string format_context(ProgramSyntax::Context &);
+       static ProgramSyntax::Module *create_builtins_module();
+       static ProgramSyntax::Module &get_builtins_module();
+       static ProgramSyntax::Stage *get_builtins(ProgramSyntax::StageType);
+       void process();
+       void generate(ProgramSyntax::Stage &);
+       bool optimize(ProgramSyntax::Stage &);
+       static void inject_block(ProgramSyntax::Block &, const ProgramSyntax::Block &);
+       template<typename T>
+       static typename T::ResultType apply(ProgramSyntax::Stage &);
+       template<typename T, typename A>
+       static typename T::ResultType apply(ProgramSyntax::Stage &, const A &);
 };
 
 } // namespace GL