[all-commits] [llvm/llvm-project] 951a28: [HLSL] Implement SV_GroupThreadId semantic (#117781)

[Zhengxing li via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 951a284fdff43f9b3aa2d2dbb2d01bbce3ab0673
      https://github.com/llvm/llvm-project/commit/951a284fdff43f9b3aa2d2dbb2d01bbce3ab0673
  Author: Zhengxing li <zhengxingli at microsoft.com>
  Date:   2024-12-10 (Tue, 10 Dec 2024)

  Changed paths:
    M clang/include/clang/Basic/Attr.td
    M clang/include/clang/Basic/AttrDocs.td
    M clang/include/clang/Sema/SemaHLSL.h
    M clang/lib/CodeGen/CGHLSLRuntime.cpp
    M clang/lib/CodeGen/CGHLSLRuntime.h
    M clang/lib/Parse/ParseHLSL.cpp
    M clang/lib/Sema/SemaDeclAttr.cpp
    M clang/lib/Sema/SemaHLSL.cpp
    A clang/test/CodeGenHLSL/semantics/SV_GroupThreadID.hlsl
    M clang/test/SemaHLSL/Semantics/entry_parameter.hlsl
    M clang/test/SemaHLSL/Semantics/invalid_entry_parameter.hlsl
    M clang/test/SemaHLSL/Semantics/valid_entry_parameter.hlsl
    M llvm/include/llvm/IR/IntrinsicsSPIRV.td
    M llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp
    A llvm/test/CodeGen/SPIRV/hlsl-intrinsics/SV_GroupThreadID.ll

  Log Message:
  -----------
  [HLSL] Implement SV_GroupThreadId semantic (#117781)

Support HLSL SV_GroupThreadId attribute.

For `directx` target, translate it into `dx.thread.id.in.group` in clang
codeGen and lower `dx.thread.id.in.group` to `dx.op.threadIdInGroup` in
LLVM DirectX backend.

For `spir-v` target, translate it into `spv.thread.id.in.group` in clang
codeGen and lower `spv.thread.id.in.group` to a `LocalInvocationId`
builtin variable in LLVM SPIR-V backend.

Fixes: #70122



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