glsl: Slightly change the semantic of _LinkedShaders

Previously _LinkedShaders was a compact array of the linked shaders
for each shader stage.  Now it is arranged such that each slot,
indexed by the MESA_SHADER_* defines, refers to a specific shader
stage.  As a result, some slots will be NULL.  This makes things a
little more complex in the linker, but it simplifies things in other
places.

As a side effect _NumLinkedShaders is removed.

NOTE: This may be a candidate for the 7.9 branch.  If there are other
patches that get backported to 7.9 that use _LinkedShader, this patch
should be cherry picked also.

1 files changed, 5 insertions, 4 deletions

diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 6702032679..13aa66fc1e 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2117,11 +2117,12 @@ struct gl_shader_program
 
    /**
     * Per-stage shaders resulting from the first stage of linking.
+    *
+    * Set of linked shaders for this program.  The array is accessed using the
+    * \c MESA_SHADER_* defines.  Entries for non-existent stages will be
+    * \c NULL.
     */
-   /*@{*/
-   GLuint _NumLinkedShaders;
-   struct gl_shader *_LinkedShaders[2];
-   /*@}*/
+   struct gl_shader *_LinkedShaders[MESA_SHADER_TYPES];
 };