glsl: Pass _mesa_glsl_parse_state into matching_signature and such.

During compilation, we'll use this to determine built-in availability.
The plan is to have a single shader containing every built-in in every
version of the language, but filter out the ones that aren't actually
available to the shader being compiled.

At link time, we don't actually need this filtering capability: we've
already imported prototypes for every built-in that the shader actually
calls, and they're flagged as is_builtin().  The linker doesn't import
any additional prototypes, so it won't pull in any unavailable
built-ins.  When resolving prototypes to function definitions, the
linker ensures the values of is_builtin() match, which means that a
shader can't trick the linker into importing the body of an unavailable
built-in by defining a suspiciously similar prototype.

In other words, during linking, we can just pass in NULL.  It will work
out fine.

Signed-off-by: Kenneth Graunke <[email protected]>
Reviewed-by: Matt Turner <[email protected]>
Reviewed-by: Paul Berry <[email protected]>

1 files changed, 6 insertions, 3 deletions

diff --git a/src/glsl/ir.h b/src/glsl/ir.h
index bd1c12cd90a..c673aac416c 100644
--- a/src/glsl/ir.h
+++ b/src/glsl/ir.h
@@ -765,20 +765,23 @@ public:
     * Find a signature that matches a set of actual parameters, taking implicit
     * conversions into account.  Also flags whether the match was exact.
     */
-   ir_function_signature *matching_signature(const exec_list *actual_param,
+   ir_function_signature *matching_signature(_mesa_glsl_parse_state *state,
+                                             const exec_list *actual_param,
 					     bool *match_is_exact);
 
    /**
     * Find a signature that matches a set of actual parameters, taking implicit
     * conversions into account.
     */
-   ir_function_signature *matching_signature(const exec_list *actual_param);
+   ir_function_signature *matching_signature(_mesa_glsl_parse_state *state,
+                                             const exec_list *actual_param);
 
    /**
     * Find a signature that exactly matches a set of actual parameters without
     * any implicit type conversions.
     */
-   ir_function_signature *exact_matching_signature(const exec_list *actual_ps);
+   ir_function_signature *exact_matching_signature(_mesa_glsl_parse_state *state,
+                                                   const exec_list *actual_ps);
 
    /**
     * Name of the function.