MSL: Make builtin argument type declaration context sensitive.

Sometimes we'll need array template, sometimes not :shrug:.

1 files changed, 72 insertions, 0 deletions

diff --git a/reference/opt/shaders-msl/frag/read-cull-clip-distance-in-function.frag b/reference/opt/shaders-msl/frag/read-cull-clip-distance-in-function.frag
new file mode 100644
index 00000000..3c9757eb
--- /dev/null
+++ b/reference/opt/shaders-msl/frag/read-cull-clip-distance-in-function.frag
@@ -0,0 +1,72 @@
+#pragma clang diagnostic ignored "-Wmissing-prototypes"
+#pragma clang diagnostic ignored "-Wmissing-braces"
+
+#include <metal_stdlib>
+#include <simd/simd.h>
+
+using namespace metal;
+
+template<typename T, size_t Num>
+struct spvUnsafeArray
+{
+    T elements[Num ? Num : 1];
+    
+    thread T& operator [] (size_t pos) thread
+    {
+        return elements[pos];
+    }
+    constexpr const thread T& operator [] (size_t pos) const thread
+    {
+        return elements[pos];
+    }
+    
+    device T& operator [] (size_t pos) device
+    {
+        return elements[pos];
+    }
+    constexpr const device T& operator [] (size_t pos) const device
+    {
+        return elements[pos];
+    }
+    
+    constexpr const constant T& operator [] (size_t pos) const constant
+    {
+        return elements[pos];
+    }
+    
+    threadgroup T& operator [] (size_t pos) threadgroup
+    {
+        return elements[pos];
+    }
+    constexpr const threadgroup T& operator [] (size_t pos) const threadgroup
+    {
+        return elements[pos];
+    }
+};
+
+struct main0_out
+{
+    float4 FragColor [[color(0)]];
+};
+
+struct main0_in
+{
+    float gl_ClipDistance_0 [[user(clip0)]];
+    float gl_ClipDistance_1 [[user(clip1)]];
+    float gl_CullDistance_0 [[user(cull0)]];
+    float gl_CullDistance_1 [[user(cull1)]];
+};
+
+fragment main0_out main0(main0_in in [[stage_in]])
+{
+    main0_out out = {};
+    spvUnsafeArray<float, 2> gl_CullDistance = {};
+    spvUnsafeArray<float, 2> gl_ClipDistance = {};
+    gl_CullDistance[0] = in.gl_CullDistance_0;
+    gl_CullDistance[1] = in.gl_CullDistance_1;
+    gl_ClipDistance[0] = in.gl_ClipDistance_0;
+    gl_ClipDistance[1] = in.gl_ClipDistance_1;
+    out.FragColor = float4(gl_CullDistance[0], gl_CullDistance[1], gl_ClipDistance[0], gl_ClipDistance[1]);
+    return out;
+}
+