[PATCH vkd3d v2 1/5] tests: Add some simple tests for HLSL function calls.

[Matteo Bruni]

From: Zebediah Figura

Signed-off-by: Zebediah Figura 
Signed-off-by: Giovanni Mascellani 
Signed-off-by: Francisco Casas 
Signed-off-by: Matteo Bruni 
---
v2: Get rid of the second comment entirely. I'm not sure that the C
standard really allows a void return, but regardless it's probably not
that important to bring that up here.

Makefile.am                     |   2 +
 tests/hlsl-function.shader_test | 164 ++++++++++++++++++++++++++++++++
 2 files changed, 166 insertions(+)
 create mode 100644 tests/hlsl-function.shader_test

diff --git a/Makefile.am b/Makefile.am
index 24257062..57cf5780 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -65,6 +65,7 @@ vkd3d_shader_tests = \
    tests/hlsl-cross.shader_test \
    tests/hlsl-duplicate-modifiers.shader_test \
    tests/hlsl-for.shader_test \
+	tests/hlsl-function.shader_test \
    tests/hlsl-function-overload.shader_test \
    tests/hlsl-gather-offset.shader_test \
    tests/hlsl-gather.shader_test \
@@ -316,6 +317,7 @@ XFAIL_TESTS = \
    tests/hlsl-bool-cast.shader_test \
    tests/hlsl-duplicate-modifiers.shader_test \
    tests/hlsl-for.shader_test \
+	tests/hlsl-function.shader_test \
    tests/hlsl-function-overload.shader_test \
    tests/hlsl-gather.shader_test \
    tests/hlsl-intrinsic-override.shader_test \
diff --git a/tests/hlsl-function.shader_test b/tests/hlsl-function.shader_test
new file mode 100644
index 00000000..8d17605b
--- /dev/null
+++ b/tests/hlsl-function.shader_test
@@ -0,0 +1,164 @@
+[pixel shader fail]
+
+float4 func();
+
+float4 main() : sv_target
+{
+    return func();
+}
+
+% It's legal to call an undefined function in unused code, though.
+
+[pixel shader]
+
+float4 func();
+
+float4 unused()
+{
+    return func();
+}
+
+float4 main() : sv_target
+{
+    return 0;
+}
+
+[pixel shader fail]
+
+void func(inout float o)
+{
+    o += 0.1;
+}
+
+float4 main() : sv_target
+{
+    float x = 0;
+    func(x + 1);
+    return 0;
+}
+
+[pixel shader fail]
+
+void func(inout float2 o)
+{
+    o += 0.1;
+}
+
+float4 main() : sv_target
+{
+    float2 x = 0;
+    func(x.yy);
+    return 0;
+}
+
+[pixel shader fail]
+
+void func(out float o)
+{
+    o = 0.1;
+}
+
+float4 main() : sv_target
+{
+    const float x = 0;
+    func(x);
+    return x;
+}
+
+[pixel shader fail]
+
+void func(inout float o)
+{
+}
+
+float4 main() : sv_target
+{
+    const float x = 0;
+    func(x);
+    return x;
+}
+
+[pixel shader fail]
+
+void func()
+{
+}
+
+float4 main() : sv_target
+{
+    return func();
+}
+
+[pixel shader fail]
+
+void foo()
+{
+}
+
+void bar()
+{
+    return foo();
+}
+
+float4 main() : sv_target
+{
+    bar();
+    return 0;
+}
+
+[pixel shader fail]
+
+float4 main() : sv_target
+{
+    func();
+    return 0;
+}
+
+void func()
+{
+}
+
+[pixel shader]
+
+float func(in float a, out float b, inout float c)
+{
+    c -= 0.2;
+    b = a * 2;
+    return a + 0.2;
+}
+
+float4 main() : sv_target
+{
+    float x[2], ret;
+
+    x[0] = 0.1;
+    x[1] = 0.9;
+    ret = func(0.3, x[0], x[1]);
+
+    return float4(ret, x[0], x[1], 0);
+}
+
+[test]
+draw quad
+probe all rgba (0.5, 0.6, 0.7, 0)
+
+[pixel shader]
+
+void func(in float a, inout float2 b)
+{
+    b.y += 0.1;
+    b *= a;
+}
+
+float4 main() : sv_target
+{
+    float3 q = float3(0.1, 0.2, 0.3);
+
+    func(3.0, q.zx);
+    func(0.5, q.yz);
+    return float4(q, 0);
+}
+
+[test]
+draw quad
+probe all rgba (0.6, 0.1, 0.5, 0)