From 035b1097db339fb605964da62d01553a2bc25061 Mon Sep 17 00:00:00 2001
From: Ilia Mirkin <imirkin@alum.mit.edu>
Date: Sat, 21 May 2016 15:41:03 -0400
Subject: nvc0/ir: return 0 for gl_TessCoord.z for non-triangles modes

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Cc: "11.1 11.2" <mesa-stable@lists.freedesktop.org>
---
 src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
index dc0667fb6a9..9b4bf8230fa 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
@@ -2264,6 +2264,10 @@ NVC0LoweringPass::readTessCoord(LValue *dst, int c)
       y = dst;
    } else {
       assert(c == 2);
+      if (prog->driver->prop.tp.domain != PIPE_PRIM_TRIANGLES) {
+         bld.mkMov(dst, bld.loadImm(NULL, 0));
+         return;
+      }
       x = bld.getSSA();
       y = bld.getSSA();
    }
-- 
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