X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fglsl%2Foptimize.h;h=92353a77ee1748c651d8d6f35ab266d6a429593c;hb=3bc34893905a2df622894aadcb6669f27f186772;hp=6d8a6194e7e9f5d2076fa81938a75aff421e39c2;hpb=83186c4a01ada8bfb0199c4396c0aaa64631577f;p=libs%2Fgl.git

diff --git a/source/glsl/optimize.h b/source/glsl/optimize.h
index 6d8a6194..92353a77 100644
--- a/source/glsl/optimize.h
+++ b/source/glsl/optimize.h
@@ -116,22 +116,32 @@ Variables which are only referenced once are also inlined. */
 class ExpressionInliner: private TraversingVisitor
 {
 private:
+	struct ExpressionUse
+	{
+		RefPtr<Expression> *reference;
+		Block *ref_scope;
+		bool blocked;
+
+		ExpressionUse(): reference(0), ref_scope(0), blocked(false) { }
+	};
+
 	struct ExpressionInfo
 	{
-		Expression *expression;
+		Assignment::Target target;
+		RefPtr<Expression> expression;
 		Block *assign_scope;
-		RefPtr<Expression> *inline_point;
+		std::vector<ExpressionUse> uses;
 		bool trivial;
-		bool available;
 
-		ExpressionInfo(): expression(0), assign_scope(0), inline_point(0), trivial(false), available(true) { }
+		ExpressionInfo(): expression(0), assign_scope(0), trivial(false) { }
 	};
 
-	std::map<Assignment::Target, ExpressionInfo> expressions;
+	std::list<ExpressionInfo> expressions;
+	std::map<Assignment::Target, ExpressionInfo *> assignments;
 	ExpressionInfo *r_ref_info;
-	bool r_any_inlined;
 	bool r_trivial;
-	bool mutating;
+	bool access_read;
+	bool access_write;
 	bool iteration_init;
 	Block *iteration_body;
 	const Operator *r_oper;
@@ -142,8 +152,6 @@ public:
 	bool apply(Stage &);
 
 private:
-	void inline_expression(Expression &, RefPtr<Expression> &);
-	virtual void visit(Block &);
 	virtual void visit(RefPtr<Expression> &);
 	virtual void visit(VariableReference &);
 	virtual void visit(MemberAccess &);
@@ -202,7 +210,8 @@ private:
 };
 
 /** 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:
@@ -216,6 +225,7 @@ private:
 	NodeList<Statement>::iterator insert_point;
 	std::set<Node *> nodes_to_remove;
 	RefPtr<Expression> r_ternary_result;
+	bool r_external_side_effects;
 
 public:
 	void apply(Stage &);
@@ -225,7 +235,10 @@ private:
 
 	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 &);
 };