linker: Implement first bits of intrastage linking

This currently involves an ugly hack so that every link doesn't result
in all the built-in functions showing up as multiply defined.  As soon
as the built-in functions are stored in a separate compilation unit,
ir_function_signature::is_built_in can be removed.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/glsl/ir.h b/src/glsl/ir.h
index fb94b5a560d..25bf6c6d151 100644
--- a/src/glsl/ir.h
+++ b/src/glsl/ir.h
@@ -324,6 +324,9 @@ public:
    /** Whether or not this function has a body (which may be empty). */
    unsigned is_defined:1;
 
+   /** Whether or not this function signature is a built-in. */
+   unsigned is_built_in:1;
+
    /** Body of instructions in the function. */
    struct exec_list body;