[Mesa-dev] [PATCH 36/78] i965/nir/vec4: Derivatives are not allowed in VS

[Eduardo Lima Mitev]

From: Antia Puentes <apuentes at igalia.com>

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89580
---
 src/mesa/drivers/dri/i965/brw_vec4_nir.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
index 65c0386..0743ff1 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
@@ -909,6 +909,14 @@ vec4_visitor::nir_emit_alu(nir_alu_instr *instr)
       inst->saturate = instr->dest.saturate;
       break;
 
+   case nir_op_fddx:
+   case nir_op_fddx_coarse:
+   case nir_op_fddx_fine:
+   case nir_op_fddy:
+   case nir_op_fddy_coarse:
+   case nir_op_fddy_fine:
+      unreachable("derivatives are not valid in vertex shaders");
+
    default:
       unreachable("Unimplemented ALU operation");
    }
-- 
2.1.4