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, 1 insertions, 1 deletions

diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp
index 52059e4bfb3..2316cf8e5e4 100644
--- a/src/glsl/ast_to_hir.cpp
+++ b/src/glsl/ast_to_hir.cpp
@@ -3576,7 +3576,7 @@ ast_function::hir(exec_list *instructions,
     */
    f = state->symbols->get_function(name);
    if (f != NULL && (state->es_shader || f->has_user_signature())) {
-      sig = f->exact_matching_signature(&hir_parameters);
+      sig = f->exact_matching_signature(state, &hir_parameters);
       if (sig != NULL) {
 	 const char *badvar = sig->qualifiers_match(&hir_parameters);
 	 if (badvar != NULL) {