[all-commits] [llvm/llvm-project] a546c7: [HLSL][DXIL][SPIRV] QuadReadAcrossY intrinsic supp...

[Kai via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a546c77478ecb2c52a538e9e203adda1ae39f524
      https://github.com/llvm/llvm-project/commit/a546c77478ecb2c52a538e9e203adda1ae39f524
  Author: Kai <47328809+kcloudy0717 at users.noreply.github.com>
  Date:   2026-03-25 (Wed, 25 Mar 2026)

  Changed paths:
    M clang/include/clang/Basic/Builtins.td
    M clang/lib/CodeGen/CGHLSLBuiltins.cpp
    M clang/lib/CodeGen/CGHLSLRuntime.h
    M clang/lib/Headers/hlsl/hlsl_alias_intrinsics.h
    M clang/lib/Sema/SemaHLSL.cpp
    A clang/test/CodeGenHLSL/builtins/QuadReadAcrossY.hlsl
    A clang/test/SemaHLSL/BuiltIns/QuadReadAcrossY-errors.hlsl
    M llvm/include/llvm/IR/IntrinsicsDirectX.td
    M llvm/include/llvm/IR/IntrinsicsSPIRV.td
    M llvm/lib/Target/DirectX/DXIL.td
    M llvm/lib/Target/DirectX/DXILShaderFlags.cpp
    M llvm/lib/Target/DirectX/DirectXTargetTransformInfo.cpp
    M llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp
    A llvm/test/CodeGen/DirectX/QuadReadAcrossY.ll
    M llvm/test/CodeGen/DirectX/ShaderFlags/wave-ops.ll
    A llvm/test/CodeGen/SPIRV/hlsl-intrinsics/QuadReadAcrossY.ll

  Log Message:
  -----------
  [HLSL][DXIL][SPIRV] QuadReadAcrossY intrinsic support (#187440)

This PR adds QuadReadAcrossY intrinsic support in HLSL with codegen for
both DirectX and SPIRV backends. Resolves
https://github.com/llvm/llvm-project/issues/99176.

- [x] Implement `QuadReadAcrossY` clang builtin,
- [x] Link `QuadReadAcrossY` clang builtin with `hlsl_intrinsics.h`
- [x] Add sema checks for `QuadReadAcrossY` to
`CheckHLSLBuiltinFunctionCall` in `SemaChecking.cpp`
- [x] Add codegen for `QuadReadAcrossY` to `EmitHLSLBuiltinExpr` in
`CGBuiltin.cpp`
- [x] Add codegen tests to
`clang/test/CodeGenHLSL/builtins/QuadReadAcrossY.hlsl`
- [x] Add sema tests to
`clang/test/SemaHLSL/BuiltIns/QuadReadAcrossY-errors.hlsl`
- [x] Create the `int_dx_QuadReadAcrossY` intrinsic in
`IntrinsicsDirectX.td`
- [x] Create the `DXILOpMapping` of `int_dx_QuadReadAcrossY` to `123` in
`DXIL.td`
- [x] Create the `QuadReadAcrossY.ll` and `QuadReadAcrossY_errors.ll`
tests in `llvm/test/CodeGen/DirectX/`
- [x] Create the `int_spv_QuadReadAcrossY` intrinsic in
`IntrinsicsSPIRV.td`
- [x] In SPIRVInstructionSelector.cpp create the `QuadReadAcrossY`
lowering and map it to `int_spv_QuadReadAcrossY` in
`SPIRVInstructionSelector::selectIntrinsic`.
- [x] Create SPIR-V backend test case in
`llvm/test/CodeGen/SPIRV/hlsl-intrinsics/QuadReadAcrossY.ll`



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