1 files changed, 55 insertions, 0 deletions
diff --git a/tests/spirv/tess-factor-legalize-array-size.slang b/tests/spirv/tess-factor-legalize-array-size.slang
new file mode 100644
index 000000000..70d020deb
--- /dev/null
+++ b/tests/spirv/tess-factor-legalize-array-size.slang
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+//TEST:SIMPLE(filecheck=GLSL):-target glsl -entry hullMain -stage hull -allow-glsl
+//TEST:SIMPLE(filecheck=SPIRV):-target spirv -entry hullMain -stage hull -allow-glsl
+
+// When targeting SPIRV, the tessellation factors should be an array with size 4 or 2.
+
+// GLSL: gl_TessLevelOuter[3] = 0.0;
+// GLSL: gl_TessLevelInner[1] = 0.0;
+
+// SPIRV: OpDecorate %gl_TessLevelOuter BuiltIn TessLevelOuter
+// SPIRV: OpDecorate %gl_TessLevelInner BuiltIn TessLevelInner
+
+// SPIRV-DAG: OpStore %gl_TessLevelOuter %[[OuterOpCompositeConstruct:[1-9][0-9]*]]
+// SPIRV-DAG: %[[OuterOpCompositeConstruct]] = OpCompositeConstruct %[[OuterOpTypeArray:[a-zA-Z_0-9]*]]
+// SPIRV-DAG: %[[OuterOpTypeArray]] = OpTypeArray %{{[^ ]*}} %[[OuterOpConstant:[a-zA-Z_0-9]*]]
+// SPIRV-DAG: %[[OuterOpConstant]] = OpConstant %{{[^ ]*}} 4
+
+// SPIRV-DAG: OpStore %gl_TessLevelInner %[[InnerOpCompositeConstruct:[1-9][0-9]*]]
+// SPIRV-DAG: %[[InnerOpCompositeConstruct]] = OpCompositeConstruct %[[InnerOpTypeArray:[a-zA-Z_0-9]*]]
+// SPIRV-DAG: %[[InnerOpTypeArray]] = OpTypeArray %{{[^ ]*}} %[[InnerOpConstant:[a-zA-Z_0-9]*]]
+// SPIRV-DAG: %[[InnerOpConstant]] = OpConstant %{{[^ ]*}} 2
+
+struct HsOut
+{
+    float2 pos;
+    float2 hm;
+};
+
+struct HscOut
+{
+    float EdgeTessFactor[3] : SV_TessFactor; // Should be legalized to float[4]
+    float InsideTessFactor[1] : SV_InsideTessFactor; // Should be legalized to float[2]
+};
+
+[domain("tri")]
+[partitioning("integer")]
+[outputtopology("triangle_ccw")]
+[outputcontrolpoints(4)]
+[patchconstantfunc("constants")]
+HsOut hullMain()
+{
+    HsOut o;
+    o.pos = 1;
+    o.hm = 2;
+    return o;
+}
+
+HscOut constants()
+{
+    HscOut o;
+    o.EdgeTessFactor[0] = 1;
+    o.EdgeTessFactor[1] = 2;
+    o.EdgeTessFactor[2] = 3;
+    o.InsideTessFactor[0] = 0.5;
+    return o;
+}