glsl: Constify parameter to a couple varying_matches methods

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

diff --git a/src/glsl/link_varyings.cpp b/src/glsl/link_varyings.cpp
index c925c00e39a1c2c1b95c727de323615cf838cf4b..a9b15f6f7b197ce7b8cf3fb2fec7b2ae64e1edc6 100644 (file)
--- a/src/glsl/link_varyings.cpp
+++ b/src/glsl/link_varyings.cpp
@@ -648,8 +648,8 @@ private:
       PACKING_ORDER_VEC3,
    };
 
-   static unsigned compute_packing_class(ir_variable *var);
-   static packing_order_enum compute_packing_order(ir_variable *var);
+   static unsigned compute_packing_class(const ir_variable *var);
+   static packing_order_enum compute_packing_order(const ir_variable *var);
    static int match_comparator(const void *x_generic, const void *y_generic);
 
    /**
@@ -869,7 +869,7 @@ varying_matches::store_locations(unsigned producer_base,
  * be safely backed into the same vec4.
  */
 unsigned
-varying_matches::compute_packing_class(ir_variable *var)
+varying_matches::compute_packing_class(const ir_variable *var)
 {
    /* Without help from the back-end, there is no way to pack together
     * variables with different interpolation types, because
@@ -900,7 +900,7 @@ varying_matches::compute_packing_class(ir_variable *var)
  * other varyings in the same packing class.
  */
 varying_matches::packing_order_enum
-varying_matches::compute_packing_order(ir_variable *var)
+varying_matches::compute_packing_order(const ir_variable *var)
 {
    const glsl_type *element_type = var->type;