Francisco Casas : tests: Add tests for assignments to self with swizzles.

[Alexandre Julliard]

Module: vkd3d
Branch: master
Commit: edf86b2248318c4359acc242b7d82874d3384b76
URL:    https://gitlab.winehq.org/wine/vkd3d/-/commit/edf86b2248318c4359acc242b7d828...

Author: Francisco Casas 
Date:   Fri Jan  6 17:33:08 2023 -0300

tests: Add tests for assignments to self with swizzles.

---

tests/swizzles.shader_test | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/tests/swizzles.shader_test b/tests/swizzles.shader_test
index 4bc8bc87..c3d3343f 100644
--- a/tests/swizzles.shader_test
+++ b/tests/swizzles.shader_test
@@ -135,3 +135,36 @@ float4 main() : sv_target
 [test]
 draw quad
 probe all rgba (1.0, 2.0, 3.0, 3.0)
+
+
+[pixel shader]
+uniform float4 color;
+
+float4 main() : sv_target
+{
+    float4 ret = color;
+    ret.xyzw = ret.xyzw; // Assignment to self.
+    return ret;
+}
+
+[test]
+uniform 0 float4 1.0 2.0 3.0 4.0
+draw quad
+probe all rgba (1.0, 2.0, 3.0, 4.0)
+
+
+[pixel shader]
+uniform float4 color;
+
+float4 main() : sv_target
+{
+    float4 ret = color;
+    ret.xyzw = ret.wxyz; // Assignment to self, shifted.
+    ret.xy = ret.yx;
+    return ret;
+}
+
+[test]
+uniform 0 float4 1.0 2.0 3.0 4.0
+draw quad
+probe all rgba (1.0, 4.0, 2.0, 3.0)