glsl: Convert ir_function_signature::is_builtin to a method.

A signature is a built-in if and only if builtin_info != NULL, so we
don't actually need a separate flag bit.  Making a boolean-valued
method allows existing code to ask the same question while not worrying
about the internal representation.

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

1 files changed, 8 insertions, 2 deletions

diff --git a/src/glsl/ir.cpp b/src/glsl/ir.cpp
index ea018eb2d9e..d9fb808c4b1 100644
--- a/src/glsl/ir.cpp
+++ b/src/glsl/ir.cpp
@@ -1585,11 +1585,17 @@ ir_function_signature::ir_function_signature(const glsl_type *return_type,
      _function(NULL)
 {
    this->ir_type = ir_type_function_signature;
-   this->is_builtin = builtin_info != NULL;
    this->origin = NULL;
 }
 
 
+bool
+ir_function_signature::is_builtin() const
+{
+   return builtin_info != NULL;
+}
+
+
 static bool
 modes_match(unsigned a, unsigned b)
 {
@@ -1661,7 +1667,7 @@ ir_function::has_user_signature()
 {
    foreach_list(n, &this->signatures) {
       ir_function_signature *const sig = (ir_function_signature *) n;
-      if (!sig->is_builtin)
+      if (!sig->is_builtin())
 	 return true;
    }
    return false;