1fdf952dee
HLSL has a language feature called Semantics which get attached to declarations like attributes and are used in a variety of ways. One example of semantic use is here with the `SV_GroupIndex` semantic which, when applied to an input for a compute shader is pre-populated by the driver with a flattened thread index. Differential Revision: https://reviews.llvm.org/D122699 # Conflicts: # clang/include/clang/Basic/Attr.td # clang/include/clang/Basic/AttrDocs.td
11 lines
550 B
HLSL
11 lines
550 B
HLSL
// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-compute -x hlsl -ast-dump -o - %s | FileCheck %s
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// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-mesh -x hlsl -ast-dump -verify -o - %s
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[numthreads(8,8, 1)]
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// expected-error@+1 {{attribute 'SV_GroupIndex' is unsupported in Mesh shaders, requires Compute}}
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void CSMain(int GI : SV_GroupIndex) {
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// CHECK: FunctionDecl 0x{{[0-9a-fA-F]+}} <{{.*}}> line:[[@LINE-1]]:6 CSMain 'void (int)'
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// CHECK-NEXT: ParmVarDecl 0x{{[0-9a-fA-F]+}} <{{.*}}> col:17 GI 'int'
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// CHECK-NEXT: HLSLSV_GroupIndexAttr
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}
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