tests: Test register reservations on structs for SM5.

Approved-by: Giovanni Mascellani (@giomasce)
Approved-by: Zebediah Figura (@zfigura)
Approved-by: Henri Verbeet (@hverbeet)
Approved-by: Alexandre Julliard (@julliard)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/342

tests/hlsl/register-reservations.shader_test

@@ -156,3 +156,76 @@ float4 main() : sv_target
 [test]
 draw quad
 probe all rgba (2.0, 2.0, 2.0, 99.0)
+
+
+[require]
+shader model >= 5.0
+
+[texture 0]
+size (2, 2)
+0.0 0.0 0.0 99.0
+0.0 0.0 0.0 99.0
+0.0 0.0 0.0 99.0
+0.0 0.0 0.0 99.0
+
+[texture 1]
+size (2, 2)
+1.0 1.0 1.0 99.0
+1.0 1.0 1.0 99.0
+0.0 0.0 0.0 99.0
+0.0 0.0 0.0 99.0
+
+[sampler 0]
+filter point point point
+address clamp clamp clamp
+
+[sampler 1]
+filter linear linear linear
+address clamp clamp clamp
+
+% If a struct spans many object register sets and one is reserved, all other used object register sets must be.
+[pixel shader fail todo]
+struct
+{
+     Texture2D tex;
+     sampler sam;
+} foo : register(t1);
+
+float4 main() : sv_target
+{
+    return foo.tex.Sample(foo.sam, float2(0.4, 0));
+}
+
+
+[pixel shader todo]
+struct
+{
+     Texture2D tex;
+     sampler sam;
+} foo : register(t1) : register(s1);
+
+float4 main() : sv_target
+{
+    return foo.tex.Sample(foo.sam, float2(0, 0.5));
+}
+
+[test]
+todo draw quad
+todo probe all rgba (0.5, 0.5, 0.5, 99.0)
+
+
+[pixel shader]
+struct
+{
+     Texture2D tex;
+     sampler sam; // unused.
+} foo : register(t1);
+
+float4 main() : sv_target
+{
+    return foo.tex.Load(int3(0, 0, 0));
+}
+
+[test]
+draw quad
+todo probe all rgba (1.0, 1.0, 1.0, 99.0)