class ir_instruction : public exec_node {
public:
enum ir_node_type ir_type;
- const struct glsl_type *type;
/** ir_print_visitor helper for debugging. */
void print(void) const;
ir_instruction()
{
ir_type = ir_type_unset;
- type = NULL;
}
};
*/
class ir_rvalue : public ir_instruction {
public:
+ const struct glsl_type *type;
+
virtual ir_rvalue *clone(void *mem_ctx, struct hash_table *) const;
virtual void accept(ir_visitor *v)
virtual ir_visitor_status accept(ir_hierarchical_visitor *);
- virtual ir_constant *constant_expression_value();
+ virtual ir_constant *constant_expression_value(struct hash_table *variable_context = NULL);
virtual ir_rvalue * as_rvalue()
{
*/
glsl_interp_qualifier determine_interpolation_mode(bool flat_shade);
+ /**
+ * Declared type of the variable
+ */
+ const struct glsl_type *type;
+
/**
* Delcared name of the variable
*/
* Several GLSL semantic checks require knowledge of whether or not a
* variable has been used. For example, it is an error to redeclare a
* variable as invariant after it has been used.
+ *
+ * This is only maintained in the ast_to_hir.cpp path, not in
+ * Mesa's fixed function or ARB program paths.
*/
unsigned used:1;
+ /**
+ * Has this variable been statically assigned?
+ *
+ * This answers whether the variable was assigned in any path of
+ * the shader during ast_to_hir. This doesn't answer whether it is
+ * still written after dead code removal, nor is it maintained in
+ * non-ast_to_hir.cpp (GLSL parsing) paths.
+ */
+ unsigned assigned:1;
+
/**
* Storage class of the variable.
*
* no effect).
*/
unsigned explicit_location:1;
+ unsigned explicit_index:1;
/**
* Does this variable have an initializer?
*/
int location;
+ /**
+ * output index for dual source blending.
+ */
+ int index;
+
/**
* Built-in state that backs this uniform
*
virtual ir_visitor_status accept(ir_hierarchical_visitor *);
/**
- * Attempt to evaluate this function as a constant expression, given
- * a list of the actual parameters. Returns NULL for non-built-ins.
+ * Attempt to evaluate this function as a constant expression,
+ * given a list of the actual parameters and the variable context.
+ * Returns NULL for non-built-ins.
*/
- ir_constant *constant_expression_value(exec_list *actual_parameters);
+ ir_constant *constant_expression_value(exec_list *actual_parameters, struct hash_table *variable_context);
/**
* Get the name of the function for which this is a signature
virtual ir_assignment *clone(void *mem_ctx, struct hash_table *ht) const;
- virtual ir_constant *constant_expression_value();
+ virtual ir_constant *constant_expression_value(struct hash_table *variable_context = NULL);
virtual void accept(ir_visitor *v)
{
/**
* Attempt to constant-fold the expression
*
+ * The "variable_context" hash table links ir_variable * to ir_constant *
+ * that represent the variables' values. \c NULL represents an empty
+ * context.
+ *
* If the expression cannot be constant folded, this method will return
* \c NULL.
*/
- virtual ir_constant *constant_expression_value();
+ virtual ir_constant *constant_expression_value(struct hash_table *variable_context = NULL);
/**
* Determine the number of operands used by an expression
virtual ir_call *clone(void *mem_ctx, struct hash_table *ht) const;
- virtual ir_constant *constant_expression_value();
+ virtual ir_constant *constant_expression_value(struct hash_table *variable_context = NULL);
virtual ir_call *as_call()
{
virtual ir_texture *clone(void *mem_ctx, struct hash_table *) const;
- virtual ir_constant *constant_expression_value();
+ virtual ir_constant *constant_expression_value(struct hash_table *variable_context = NULL);
virtual void accept(ir_visitor *v)
{
virtual ir_swizzle *clone(void *mem_ctx, struct hash_table *) const;
- virtual ir_constant *constant_expression_value();
+ virtual ir_constant *constant_expression_value(struct hash_table *variable_context = NULL);
virtual ir_swizzle *as_swizzle()
{
virtual ir_dereference_variable *clone(void *mem_ctx,
struct hash_table *) const;
- virtual ir_constant *constant_expression_value();
+ virtual ir_constant *constant_expression_value(struct hash_table *variable_context = NULL);
virtual ir_dereference_variable *as_dereference_variable()
{
virtual ir_dereference_array *clone(void *mem_ctx,
struct hash_table *) const;
- virtual ir_constant *constant_expression_value();
+ virtual ir_constant *constant_expression_value(struct hash_table *variable_context = NULL);
virtual ir_dereference_array *as_dereference_array()
{
virtual ir_dereference_record *clone(void *mem_ctx,
struct hash_table *) const;
- virtual ir_constant *constant_expression_value();
+ virtual ir_constant *constant_expression_value(struct hash_table *variable_context = NULL);
/**
* Get the variable that is ultimately referenced by an r-value
virtual ir_constant *clone(void *mem_ctx, struct hash_table *) const;
- virtual ir_constant *constant_expression_value();
+ virtual ir_constant *constant_expression_value(struct hash_table *variable_context = NULL);
virtual ir_constant *as_constant()
{