glsl: Make it possible to ignore built-ins when matching signatures.

Historically, we've implemented the rules for overriding built-in
functions by creating multiple ir_functions and relying on the symbol
table to hide the one containing built-in functions.  That works, but
has a few drawbacks, so the next patch will change it.

Instead, we'll have a single ir_function for a particular name, which
will contain both built-in and user-defined signatures.  Passing an
extra parameter to matching_signature makes it easy to ignore built-ins
when they're supposed to be hidden.

I didn't add the parameter to exact_matching_signature since it wasn't
necessary.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/src/glsl/lower_packed_varyings.cpp b/src/glsl/lower_packed_varyings.cpp
index c72b80a..7801483 100644
--- a/src/glsl/lower_packed_varyings.cpp
+++ b/src/glsl/lower_packed_varyings.cpp
@@ -655,7 +655,7 @@ lower_packed_varyings(void *mem_ctx, unsigned locations_used,
    ir_function *main_func = shader->symbols->get_function("main");
    exec_list void_parameters;
    ir_function_signature *main_func_sig
-      = main_func->matching_signature(NULL, &void_parameters);
+      = main_func->matching_signature(NULL, &void_parameters, false);
    exec_list new_instructions;
    lower_packed_varyings_visitor visitor(mem_ctx, locations_used, mode,
                                          gs_input_vertices, &new_instructions);