Tests: Add a set of gtest-file-based HLSL tests.
diff --git a/Test/hlsl.precedence.frag b/Test/hlsl.precedence.frag
new file mode 100644
index 0000000..eae0435
--- /dev/null
+++ b/Test/hlsl.precedence.frag
@@ -0,0 +1,9 @@
+float4 PixelShaderFunction(
+    float4 a1,
+    float4 a2,
+    float4 a3,
+    float4 a4
+    ) : COLOR0
+{
+    return a1 + a2 * a3 + a4;
+}