On Mon, 2016-10-17 at 19:25 +0200, Nicolai Hähnle wrote:
> From: Nicolai Hähnle <nicolai.haeh...@amd.com>
>
> Use a full writemask in this case. This is relevant e.g. when a
> function
> has an inout argument which is an array of structs.
> ---
> src/mesa/state_tracker/st_glsl_to_tgsi.cpp | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
> b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
> index 1662f7f..b91ebaf 100644
> --- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
> +++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
> @@ -2964,24 +2964,26 @@ glsl_to_tgsi_visitor::visit(ir_assignment
> *ir)
>
> if (variable->data.location == FRAG_RESULT_DEPTH)
> l.writemask = WRITEMASK_Z;
> else {
> assert(variable->data.location == FRAG_RESULT_STENCIL);
> l.writemask = WRITEMASK_Y;
> }
> } else if (ir->write_mask == 0) {
> assert(!ir->lhs->type->is_scalar() && !ir->lhs->type-
> >is_vector());
>
> - if (ir->lhs->type->is_array() || ir->lhs->type-
> >is_matrix()) {
> - unsigned num_elements = ir->lhs->type->without_array()-
> >vector_elements;
> + unsigned num_elements = ir->lhs->type->without_array()-
> >vector_elements;
> +
> + if (num_elements) {
> l.writemask = u_bit_consecutive(0, num_elements);
> } else {
> + // The type is a struct or an array of (array of)
> structs.
C++ style comment in Mesa :(
> l.writemask = WRITEMASK_XYZW;
> }
> } else {
> l.writemask = ir->write_mask;
> }
>
> for (int i = 0; i < 4; i++) {
> if (l.writemask & (1 << i)) {
> first_enabled_chan = GET_SWZ(r.swizzle, i);
> break;
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