linker: Don't automatically allocate VERT_ATTRIB_GENERIC0
diff --git a/src/glsl/linker.cpp b/src/glsl/linker.cpp
index 719cae2..a53e91d 100644
--- a/src/glsl/linker.cpp
+++ b/src/glsl/linker.cpp
@@ -669,6 +669,12 @@
qsort(to_assign, num_attr, sizeof(to_assign[0]), temp_attr::compare);
+ /* VERT_ATTRIB_GENERIC0 is a psdueo-alias for VERT_ATTRIB_POS. It can only
+ * be explicitly assigned by via glBindAttribLocation. Mark it as reserved
+ * to prevent it from being automatically allocated below.
+ */
+ used_locations |= VERT_BIT_GENERIC0;
+
for (unsigned i = 0; i < num_attr; i++) {
/* Mask representing the contiguous slots that will be used by this
* attribute.