From: Nicolai Hähnle <nicolai.haehnle@amd.com>
Date: Sun, 16 Oct 2016 15:34:33 +0000 (+0200)
Subject: st/glsl_to_tgsi: fix block copies of arrays of structs
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a1895685f8f341e7facf3c5705bdee99860e3082;p=mesa.git

st/glsl_to_tgsi: fix block copies of arrays of structs

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.

v2: use C-style comment (Timothy Arceri)

Reviewed-by: Marek Olšák <marek.olsak@amd.com> (v1)
Cc: 13.0 <mesa-stable@lists.freedesktop.org>
---

diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 562587ee58c..854decc39ac 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -2941,10 +2941,12 @@ glsl_to_tgsi_visitor::visit(ir_assignment *ir)
       } 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. */
             l.writemask = WRITEMASK_XYZW;
          }
       } else {