[clang] [HLSL] Implement SV_GroupID semantic (PR #115911)

[Joshua Batista via cfe-commits]

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@@ -27,3 +27,25 @@ struct ST2 {
     static uint X : SV_DispatchThreadID;
     uint s : SV_DispatchThreadID;
 };
+
+[numthreads(8,8,1)]
+// expected-error at +1 {{attribute 'SV_GroupID' only applies to a field or parameter of type 'uint/uint2/uint3'}}
+void CSMain_GID(float ID : SV_GroupID) {
+}
+
+[numthreads(8,8,1)]
+// expected-error at +1 {{attribute 'SV_GroupID' only applies to a field or parameter of type 'uint/uint2/uint3'}}
+void CSMain2_GID(ST GID : SV_GroupID) {
+
+}
+
+void foo_GID() {
+// expected-warning at +1 {{'SV_GroupID' attribute only applies to parameters and non-static data members}}
+  uint GIS : SV_GroupID;
+}
+
+struct ST2_GID {
+// expected-warning at +1 {{'SV_GroupID' attribute only applies to parameters and non-static data members}}
+    static uint GID : SV_GroupID;
+    uint s_gid : SV_GroupID;
+};
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bob80905 wrote:

new line at EOF

https://github.com/llvm/llvm-project/pull/115911