[all-commits] [llvm/llvm-project] 8f9ee3: [HLSL] Implement `rsqrt` intrinsic (#84820)

[Farzon Lotfi via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8f9ee39c58064d3a3291a89509501ebe55d2e788
      https://github.com/llvm/llvm-project/commit/8f9ee39c58064d3a3291a89509501ebe55d2e788
  Author: Farzon Lotfi <1802579+farzonl at users.noreply.github.com>
  Date:   2024-03-14 (Thu, 14 Mar 2024)

  Changed paths:
    M clang/include/clang/Basic/Builtins.td
    M clang/lib/CodeGen/CGBuiltin.cpp
    M clang/lib/Headers/hlsl/hlsl_intrinsics.h
    M clang/lib/Sema/SemaChecking.cpp
    A clang/test/CodeGenHLSL/builtins/rsqrt.hlsl
    M clang/test/SemaHLSL/BuiltIns/frac-errors.hlsl
    M clang/test/SemaHLSL/BuiltIns/rcp-errors.hlsl
    A clang/test/SemaHLSL/BuiltIns/rsqrt-errors.hlsl
    M llvm/include/llvm/IR/IntrinsicsDirectX.td
    M llvm/lib/Target/DirectX/DXIL.td
    A llvm/test/CodeGen/DirectX/rsqrt.ll
    A llvm/test/CodeGen/DirectX/rsqrt_error.ll

  Log Message:
  -----------
  [HLSL] Implement `rsqrt` intrinsic (#84820)

This change implements #70074
- `hlsl_intrinsics.h` - add the `rsqrt` api
- `DXIL.td` add the llvm intrinsic to DXIL op lowering map.
- `Builtins.td` - add an hlsl builtin for rsqrt.
- `CGBuiltin.cpp` add the ir generation for the rsqrt intrinsic.
- `SemaChecking.cpp` - reuse the one arg float only  checks.
- `IntrinsicsDirectX.td` -add an `rsqrt` intrinsic.



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