I haven't checked spirv for the specific naming, but note that prim ID can be an output in gs. <div class="gmail_extra"> <div class="gmail_quote">On Nov 11, 2016 1:34 AM, "Jason Ekstrand" <<a href="mailto:jason@jlekstrand.net">jason@jlekstrand.net</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Before, we were treating it as an output which is just completely bogus. We could go for an input but a system value makes more sense. Cc: "13.0" <<a href="mailto:mesa-stable@lists.freedesktop.org">mesa-stable@lists.freedesktop.org</a>> --- src/compiler/spirv/vtn_variables.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/compiler/spirv/vtn_variables.c b/src/compiler/spirv/vtn_variables.c index bbcca14..a4d5367 100644 --- a/src/compiler/spirv/vtn_variables.c +++ b/src/compiler/spirv/vtn_variables.c @@ -806,8 +806,8 @@ vtn_get_builtin_location(struct vtn_builder *b, set_mode_system_value(mode); break; case SpvBuiltInPrimitiveId: - *location = VARYING_SLOT_PRIMITIVE_ID; - *mode = nir_var_shader_out; + *location = SYSTEM_VALUE_PRIMITIVE_ID; + set_mode_system_value(mode); break; case SpvBuiltInInvocationId: *location = SYSTEM_VALUE_INVOCATION_ID; -- 2.5.0.400.gff86faf _______________________________________________ mesa-dev mailing list <a href="mailto:mesa-dev@lists.freedesktop.org">mesa-dev@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/mesa-dev" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/mesa-dev</a> </blockquote></div></div>