Issue: https://github.com/llvm/llvm-project/issues/99172
- [x] Implement `WavePrefixSum` clang builtin
- [x] Link `WavePrefixSum` clang builtin with `hlsl_intrinsics.h`
- [x] Add sema checks for `WavePrefixSum` to
`CheckHLSLBuiltinFunctionCall` in `SemaChecking.cpp`
- [x] Add codegen for `WavePrefixSum` to `EmitHLSLBuiltinExpr` in
`CGBuiltin.cpp`
- [x] Add codegen tests to
`clang/test/CodeGenHLSL/builtins/WavePrefixSum.hlsl`
- [x] Add sema tests to
`clang/test/SemaHLSL/BuiltIns/WavePrefixSum-errors.hlsl`
- [x] Create the `int_dx_WavePrefixSum` intrinsic in
`IntrinsicsDirectX.td`
- [x] Create the `DXILOpMapping` of `int_dx_WavePrefixSum` to `121` in
`DXIL.td`
- [x] Create the `WavePrefixSum.ll` and `WavePrefixSum_errors.ll` tests
in `llvm/test/CodeGen/DirectX/`
- [x] Create the `int_spv_WavePrefixSum` intrinsic in
`IntrinsicsSPIRV.td`
- [x] In SPIRVInstructionSelector.cpp create the `WavePrefixSum`
lowering and map it to `int_spv_WavePrefixSum` in
`SPIRVInstructionSelector::selectIntrinsic`.
- [x] Create SPIR-V backend test case in
`llvm/test/CodeGen/SPIRV/hlsl-intrinsics/WavePrefixSum.ll`
I also added a new macro
`GENERATE_HLSL_INTRINSIC_FUNCTION_SELECT_UNSIGNED` in conjunction with
the new function `getUnsignedIntrinsicVariant` to make selecting
unsigned variants of the intrinsic easier. As a result, I was able to
replace `getWaveActiveSumIntrinsic`, `getWaveActiveMaxIntrinsic`, and
`getWaveActiveMinIntrinsic` using the new macro.
751a546fa9