glsl2: Add a new pass at the IR level to break down matrix ops to vector ops.

This will be used by the Mesa IR and likely most HW backends, as it
allows other optimizations to occur that might not otherwise.

Fixes glsl-vs-mat-sub-1, glsl-vs-mat-div-1.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/glsl/ir.h b/src/glsl/ir.h
index 500a8c7a00..0d5bbc20aa 100644
--- a/src/glsl/ir.h
+++ b/src/glsl/ir.h
@@ -74,6 +74,7 @@ public:
    virtual class ir_dereference *       as_dereference()      { return NULL; }
    virtual class ir_dereference_array *	as_dereference_array() { return NULL; }
    virtual class ir_dereference_variable *as_dereference_variable() { return NULL; }
+   virtual class ir_expression *        as_expression()       { return NULL; }
    virtual class ir_rvalue *            as_rvalue()           { return NULL; }
    virtual class ir_loop *              as_loop()             { return NULL; }
    virtual class ir_assignment *        as_assignment()       { return NULL; }
@@ -603,6 +604,11 @@ public:
    ir_expression(int op, const struct glsl_type *type,
 		 ir_rvalue *, ir_rvalue *);
 
+   virtual ir_expression *as_expression()
+   {
+      return this;
+   }
+
    virtual ir_expression *clone(struct hash_table *ht) const;
 
    static unsigned int get_num_operands(ir_expression_operation);