Mesa (master): gallium/nir/tgsi: only scan fragment shader inputs for usage_mask

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Module: Mesa
Branch: master
Commit: a3257ae7bec68d57e79928eb202cd522d708e720
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=a3257ae7bec68d57e79928eb202cd522d708e720

Author: Dave Airlie <airlied at redhat.com>
Date:   Mon Feb 17 17:13:58 2020 +1000

gallium/nir/tgsi: only scan fragment shader inputs for usage_mask

The scanner doesn't work with tess shaders, but we don't need it for those,
in fact only frag shaders need it.

Reviewed-by: Roland Scheidegger <sroland at vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3841>

---

 src/gallium/auxiliary/nir/nir_to_tgsi_info.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/gallium/auxiliary/nir/nir_to_tgsi_info.c b/src/gallium/auxiliary/nir/nir_to_tgsi_info.c
index a761f4460c6..cc705e75804 100644
--- a/src/gallium/auxiliary/nir/nir_to_tgsi_info.c
+++ b/src/gallium/auxiliary/nir/nir_to_tgsi_info.c
@@ -135,10 +135,13 @@ static void gather_intrinsic_load_deref_info(const nir_shader *nir,
 {
    assert(var && var->data.mode == nir_var_shader_in);
 
-   gather_usage(deref, nir_ssa_def_components_read(&instr->dest.ssa),
-		info->input_usage_mask);
+   if (nir->info.stage == MESA_SHADER_FRAGMENT)
+      gather_usage(deref, nir_ssa_def_components_read(&instr->dest.ssa),
+                   info->input_usage_mask);
+
    switch (nir->info.stage) {
    case MESA_SHADER_VERTEX: {
+
       break;
    }
    default: {