#include <map>
#include <set>
-#include "evaluate.h"
#include "visitor.h"
namespace Msp {
namespace GL {
namespace SL {
+/** Assigns values to specialization constants, turning them into normal
+constants. */
+class ConstantSpecializer: private TraversingVisitor
+{
+private:
+ const std::map<std::string, int> *values = 0;
+
+public:
+ void apply(Stage &, const std::map<std::string, int> &);
+
+private:
+ virtual void visit(VariableDeclaration &);
+};
+
/** Finds functions which are candidates for inlining. Currently this means
-functions which have no parameters, contain no more than one return statement,
-and are only called once. */
+functions which have no flow control statements, no more than one return
+statement, and are either builtins or only called once. */
class InlineableFunctionLocator: private TraversingVisitor
{
private:
std::map<FunctionDeclaration *, unsigned> refcounts;
std::set<FunctionDeclaration *> inlineable;
- FunctionDeclaration *current_function;
- unsigned return_count;
+ FunctionDeclaration *current_function = 0;
+ unsigned return_count = 0;
public:
- InlineableFunctionLocator();
-
- const std::set<FunctionDeclaration *> &apply(Stage &s) { s.content.visit(*this); return inlineable; }
+ std::set<FunctionDeclaration *> apply(Stage &s) { s.content.visit(*this); return inlineable; }
private:
virtual void visit(FunctionCall &);
class InlineContentInjector: private TraversingVisitor
{
private:
- FunctionDeclaration *source_func;
- Block *target_block;
- std::map<std::string, VariableDeclaration *> variable_map;
- bool remap_names;
- bool deps_only;
+ enum Pass
+ {
+ REFERENCED,
+ INLINE,
+ RENAME
+ };
+
+ FunctionDeclaration *source_func = 0;
+ Block staging_block;
+ Pass pass = REFERENCED;
RefPtr<Statement> r_inlined_statement;
std::set<Node *> dependencies;
+ std::set<std::string> referenced_names;
std::string r_result_name;
public:
- InlineContentInjector();
-
- const std::string &apply(Stage &, FunctionDeclaration &, Block &, const NodeList<Statement>::iterator &, FunctionDeclaration &);
+ std::string apply(Stage &, FunctionDeclaration &, Block &, const NodeList<Statement>::iterator &, FunctionCall &);
private:
- std::string create_unused_name(const std::string &, bool);
-
virtual void visit(VariableReference &);
virtual void visit(InterfaceBlockReference &);
virtual void visit(FunctionCall &);
class FunctionInliner: private TraversingVisitor
{
private:
- Stage *stage;
+ Stage *stage = 0;
std::set<FunctionDeclaration *> inlineable;
- FunctionDeclaration *current_function;
+ FunctionDeclaration *current_function = 0;
NodeList<Statement>::iterator insert_point;
RefPtr<Expression> r_inline_result;
- bool r_any_inlined;
+ bool r_any_inlined = false;
+ bool r_inlined_here = false;
public:
- FunctionInliner();
-
bool apply(Stage &);
private:
- void visit_and_inline(RefPtr<Expression> &);
-
+ virtual void visit(RefPtr<Expression> &);
virtual void visit(Block &);
- virtual void visit(UnaryExpression &);
- virtual void visit(BinaryExpression &);
- virtual void visit(Assignment &a) { visit(static_cast<BinaryExpression &>(a)); }
- virtual void visit(MemberAccess &);
virtual void visit(FunctionCall &);
- virtual void visit(ExpressionStatement &);
- virtual void visit(VariableDeclaration &);
virtual void visit(FunctionDeclaration &);
- virtual void visit(Conditional &);
virtual void visit(Iteration &);
- virtual void visit(Return &);
};
/** Inlines variables into expressions. Variables with trivial values (those
class ExpressionInliner: private TraversingVisitor
{
private:
+ struct ExpressionUse
+ {
+ RefPtr<Expression> *reference = 0;
+ Block *ref_scope = 0;
+ bool blocked = false;
+ };
+
struct ExpressionInfo
{
- Expression *expression;
- Block *assign_scope;
- RefPtr<Expression> *inline_point;
- const Operator *inner_oper;
- const Operator *outer_oper;
- bool inline_on_rhs;
- bool trivial;
- bool available;
-
- ExpressionInfo();
+ Assignment::Target target;
+ RefPtr<Expression> expression;
+ Block *assign_scope = 0;
+ std::vector<ExpressionUse> uses;
+ bool trivial = false;
};
- std::map<VariableDeclaration *, ExpressionInfo> expressions;
- ExpressionInfo *r_ref_info;
- bool r_any_inlined;
- bool r_trivial;
- bool mutating;
- bool iteration_init;
- Block *iteration_body;
- const Operator *r_oper;
+ std::list<ExpressionInfo> expressions;
+ std::map<Assignment::Target, ExpressionInfo *> assignments;
+ ExpressionInfo *r_ref_info = 0;
+ bool r_trivial = false;
+ bool access_read = true;
+ bool access_write = false;
+ bool iteration_init = false;
+ Block *iteration_body = 0;
+ const Operator *r_oper = 0;
public:
- ExpressionInliner();
-
bool apply(Stage &);
private:
- void visit_and_record(RefPtr<Expression> &, const Operator *, bool);
- void inline_expression(Expression &, RefPtr<Expression> &, const Operator *, const Operator *, bool);
- virtual void visit(Block &);
+ virtual void visit(RefPtr<Expression> &);
virtual void visit(VariableReference &);
virtual void visit(MemberAccess &);
+ virtual void visit(Swizzle &);
virtual void visit(UnaryExpression &);
virtual void visit(BinaryExpression &);
virtual void visit(Assignment &);
+ virtual void visit(TernaryExpression &);
+ virtual void visit(FunctionCall &);
+ virtual void visit(VariableDeclaration &);
+ virtual void visit(Iteration &);
+};
+
+/** Replaces expressions consisting entirely of literals with the results of
+evaluating the expression.*/
+class ConstantFolder: private TraversingVisitor
+{
+private:
+ VariableDeclaration *iteration_var = 0;
+ Variant iter_init_value;
+ Variant r_constant_value;
+ bool iteration_init = false;
+ bool r_constant = false;
+ bool r_literal = false;
+ bool r_uses_iter_var = false;
+ bool r_any_folded = false;
+
+public:
+ bool apply(Stage &s) { s.content.visit(*this); return r_any_folded; }
+
+private:
+ template<typename T>
+ static T evaluate_logical(char, T, T);
+ template<typename T>
+ static bool evaluate_relation(const char *, T, T);
+ template<typename T>
+ static T evaluate_arithmetic(char, T, T);
+ template<typename T>
+ static T evaluate_int_special_op(char, T, T);
+ template<typename T>
+ void convert_to_result(const Variant &);
+ void set_result(const Variant &, bool = false);
+
+ virtual void visit(RefPtr<Expression> &);
+ virtual void visit(Literal &);
+ virtual void visit(VariableReference &);
+ virtual void visit(MemberAccess &);
+ virtual void visit(Swizzle &);
+ virtual void visit(UnaryExpression &);
+ virtual void visit(BinaryExpression &);
+ virtual void visit(Assignment &);
+ virtual void visit(TernaryExpression &);
virtual void visit(FunctionCall &);
virtual void visit(VariableDeclaration &);
- virtual void visit(Conditional &);
virtual void visit(Iteration &);
- virtual void visit(Return &);
};
/** Removes conditional statements and loops where the condition can be
-determined as constant at compile time. */
+determined as constant at compile time. Also removes such statements where
+the body is empty and the condition has no side effects. */
class ConstantConditionEliminator: private TraversingVisitor
{
private:
+ enum ConstantStatus
+ {
+ CONSTANT_FALSE,
+ CONSTANT_TRUE,
+ NOT_CONSTANT
+ };
+
NodeList<Statement>::iterator insert_point;
std::set<Node *> nodes_to_remove;
+ RefPtr<Expression> r_ternary_result;
+ bool r_external_side_effects = false;
public:
void apply(Stage &);
private:
+ ConstantStatus check_constant_condition(const Expression &);
+
virtual void visit(Block &);
+ virtual void visit(RefPtr<Expression> &);
+ virtual void visit(UnaryExpression &);
+ virtual void visit(Assignment &);
+ virtual void visit(TernaryExpression &);
+ virtual void visit(FunctionCall &);
virtual void visit(Conditional &);
virtual void visit(Iteration &);
};
+class UnreachableCodeRemover: private TraversingVisitor
+{
+private:
+ bool reachable = true;
+ std::set<Node *> unreachable_nodes;
+
+public:
+ virtual bool apply(Stage &);
+
+private:
+ virtual void visit(Block &);
+ virtual void visit(FunctionDeclaration &);
+ virtual void visit(Conditional &);
+ virtual void visit(Iteration &);
+ virtual void visit(Return &) { reachable = false; }
+ virtual void visit(Jump &) { reachable = false; }
+};
+
/** Removes types which are not used anywhere. */
class UnusedTypeRemover: private TraversingVisitor
{
bool apply(Stage &);
private:
- virtual void visit(Literal &);
- virtual void visit(UnaryExpression &);
- virtual void visit(BinaryExpression &);
- virtual void visit(FunctionCall &);
+ virtual void visit(RefPtr<Expression> &);
virtual void visit(BasicTypeDeclaration &);
virtual void visit(ImageTypeDeclaration &);
virtual void visit(StructDeclaration &);
virtual void visit(VariableDeclaration &);
+ virtual void visit(InterfaceBlock &);
virtual void visit(FunctionDeclaration &);
};
class UnusedVariableRemover: private TraversingVisitor
{
private:
- struct VariableInfo
+ struct AssignmentInfo
{
- bool local;
- std::vector<Node *> assignments;
- bool conditionally_assigned;
- bool referenced;
-
- VariableInfo();
+ Node *node = 0;
+ Assignment::Target target;
+ std::vector<Node *> used_by;
+ unsigned in_loop = 0;
};
- typedef std::map<VariableDeclaration *, VariableInfo> BlockVariableMap;
+ struct VariableInfo
+ {
+ InterfaceBlock *interface_block = 0;
+ std::vector<AssignmentInfo *> assignments;
+ bool initialized = false;
+ bool output = false;
+ bool referenced = false;
+ };
+ typedef std::map<Statement *, VariableInfo> BlockVariableMap;
+
+ Stage *stage = 0;
+ BlockVariableMap variables;
+ std::list<AssignmentInfo> assignments;
+ InterfaceBlock *interface_block = 0;
+ Assignment *r_assignment = 0;
+ bool assignment_target = false;
+ bool r_side_effects = false;
+ bool in_struct = false;
+ bool composite_reference = false;
+ unsigned in_loop = 0;
+ std::vector<Node *> loop_ext_refs;
+ Assignment::Target r_reference;
std::set<Node *> unused_nodes;
- std::map<VariableDeclaration *, Node *> aggregates;
- Node *aggregate;
- std::vector<BlockVariableMap> variables;
- Assignment *r_assignment;
- bool assignment_target;
- bool r_assign_to_subfield;
- bool r_side_effects;
public:
- UnusedVariableRemover();
-
bool apply(Stage &);
private:
+ void referenced(const Assignment::Target &, Node &);
virtual void visit(VariableReference &);
virtual void visit(InterfaceBlockReference &);
+ void visit_composite(Expression &);
virtual void visit(MemberAccess &);
+ virtual void visit(Swizzle &);
virtual void visit(UnaryExpression &);
virtual void visit(BinaryExpression &);
virtual void visit(Assignment &);
- void record_assignment(VariableDeclaration &, Node &, bool);
- void clear_assignments(VariableInfo &, bool);
+ virtual void visit(TernaryExpression &);
virtual void visit(FunctionCall &);
+ void record_assignment(const Assignment::Target &, Node &);
virtual void visit(ExpressionStatement &);
virtual void visit(StructDeclaration &);
virtual void visit(VariableDeclaration &);
virtual void visit(InterfaceBlock &);
+ void merge_variables(const BlockVariableMap &);
virtual void visit(FunctionDeclaration &);
- void merge_down_variables();
virtual void visit(Conditional &);
virtual void visit(Iteration &);
};
projects / libs / gl.git / blobdiff