[PATCH 4/7] tests: Add failing test for clip.shader_test in SM1.

[Francisco Casas]

From: Francisco Casas

We are directly translating HLSL_IR_JUMP_DISCARD_NEG to texkill, but
texkill only takes the first three components into account, so if only
the 4th component is negative, we get different results.
---
 tests/hlsl/clip.shader_test | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tests/hlsl/clip.shader_test b/tests/hlsl/clip.shader_test
index 1ebc06871..68059f216 100644
--- a/tests/hlsl/clip.shader_test
+++ b/tests/hlsl/clip.shader_test
@@ -20,3 +20,6 @@ probe all rgba (9, 8, 7, 6)
 uniform 0 float4 9 0 7 6
 todo(glsl) draw quad
 probe all rgba (9, 0, 7, 6)
+uniform 0 float4 3 3 3 -1
+todo(glsl) draw quad
+todo(sm<4) probe all rgba (9, 0, 7, 6)