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/link_functions.cpp b/src/glsl/link_functions.cpp
index 2ce9609..f86aec6 100644
--- a/src/glsl/link_functions.cpp
+++ b/src/glsl/link_functions.cpp
@@ -307,7 +307,7 @@ find_matching_signature(const char *name, const exec_list *actual_parameters,
 	 continue;
 
       ir_function_signature *sig =
-         f->matching_signature(NULL, actual_parameters);
+         f->matching_signature(NULL, actual_parameters, use_builtin);
 
       if ((sig == NULL) ||
           (!sig->is_defined && !sig->is_intrinsic))